CN100442319C - Composite line type temperature sensing fire detector and its data fusing warning method - Google Patents
Composite line type temperature sensing fire detector and its data fusing warning method Download PDFInfo
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Abstract
The invention relates to a fire detector of complex linear temperature sensing and the alarm method of data fusion. It consists of a linear temperature sensing element A, a linear temperature sensing B, a device of measuring electric signal. The described linear temperature sensing element A and linear temperature sensing element B are set together in parallel. The linear temperature sensing element A and linear temperature sensing element B has a detector and two electrical parameters signal output terminals respectively. The descried electrical parameters signal output terminal is connected with the device of measuring electric signal. The electrical parameters signals which are output from the described linear temperature sensing element A and linear temperature sensing element B output are not equivalent. The present invention can eliminate the influence of the heated length of linear temperature sensing detector to the fire alarm function, improve the alarm accuracy and effectively reduce the mistaken rate of detector.
Description
Technical field
The present invention relates to the alarm method of a kind of composite line type temperature sensing fire detector and data fusion thereof, this fire detector contains two of the same type or dissimilar linear temperature sensors, and described two linear temperature sensors output to the electrical quantity signal inequivalence of electric signal measurement device.The electric signal measurement device merges the electrical quantity signal of two inequivalences and carries out fire alarm (being that differential temperature, constant temperature or different constant temperature are reported to the police) according to fusion results.
Background technology
In the prior art, line style constant temperature, differential temperature or different constant temperature fire detector commonly used are a kind of broad-spectrum line type fire detectors, and its principal feature has been to use a temperature sensing cable (air hose or cable formula NTC type temperature sensing cable or cable formula thermocouple type temperature sensing cable).Accompanying drawing 1 has shown the structure of traditional cable linear fire detector, and detector is made up of three parts: temperature sensing cable (temperature sensing element) 100; Electric signal measurement device (boxcar) 200; Termination box 300.Termination box is used to detect the short circuit and the open circuit fault (also can cancel in some cases) of temperature sensing cable; Electric signal measurement device (also claiming boxcar) is used to measure resistance, voltage, electric current or other electrical quantity between two terminals of temperature sensing cable.Accompanying drawing 2 has shown the structure of traditional air hose line style fire detector, and detector is made up of three parts: air hose (temperature sensing element) 101; Electric signal measurement device 201; Pressure-electric signal transducer 400.The temperature sensing cable of line type fire detector or air hose are linear temperature sensors, when wherein a certain section is heated, and the value of the electrical quantity between two terminals that the electric signal measurement device joins (resistance, voltage, electric current, electric capacity or other electrical quantity) changes, the electric signal measurement device according to the electrical quantity size of the said temperature induction element that records and over time rate carry out constant temperature and differential temperature respectively and report to the police, and the size of electrical quantity depends on four factors: i.e. the residing environment temperature Ti of temperature sensing element; The use length L m of temperature sensing element; The length L of the heated portion of temperature sensing element; The temperature T of the heated portion of temperature sensing element.Under the certain situation of the use length L m of the residing environment temperature Ti of temperature sensing element, temperature sensing element, the electrical quantity size of the said temperature induction element that the electric signal measurement device records depends on the temperature T of the be heated length L and the heated portion of temperature sensing element.And in the fire of reality and in the testing experiment under the laboratory condition, the temperature and the length of the heated portion of temperature sensing element all change.Obviously, the size of the above-mentioned electrical quantity that records and rate of change can not reflect the size of temperature of temperature sensing element heated portion and the size of variation of temperature rate fully.Technical standard according to line type fire detector, qualified line type fire detector must be by two detections of the test of the action under certain test condition and the test of being failure to actuate, and qualified and underproof judgement is mainly carried out according to this single parameter of temperature T of the heated portion of temperature sensing element.As seen, the line type fire detector of the single temperature sensing element of employing of the prior art can't be measured the size of temperature T of temperature sensing element heated portion and the size of variation of temperature rate T ' accurately, thereby can't under fire condition, accurately report to the police, also be difficult to two tests testing and be failure to actuate and test by the action of line type fire detector being carried out according to the technical standard of line type fire detector.Therefore, need to propose the alarm method of a kind of composite line type temperature sensing fire detector and data fusion thereof.
Summary of the invention
The object of the present invention is to provide the alarm method of a kind of composite line type temperature sensing fire detector and data fusion thereof, this fire detector contains two of the same type or dissimilar linear temperature sensors, and described two linear temperature sensors output to two kinds of electrical quantity signal inequivalences of electric signal measurement device.The electric signal measurement device merges the electrical quantity signal of two kinds of inequivalences and carries out fire alarm according to fusion results.(being that differential temperature, constant temperature or different constant temperature are reported to the police).The present invention can eliminate the length of being heated of temperature sensing element of line-type heat detector to the influence of its fire alarm function, improves the warning accuracy of detector, and can reduce the rate of false alarm of detector effectively.
The objective of the invention is to be realized by following technical proposals: a kind of composite line type temperature sensing fire detector is made of a linear temperature sensor A, linear temperature sensor B, an electric signal measurement device; Described linear temperature sensor A, linear temperature sensor B are parallel to be set together; Described linear temperature sensor A, linear temperature sensor B respectively have at least one and survey body and two electrical quantity signal output terminals, and described electrical quantity signal output terminal is electrically connected with the electric signal measurement device respectively; Described linear temperature sensor A, linear temperature sensor B output to the electrical quantity signal inequivalence of electric signal measurement device.
A kind of alarm method of data fusion uses a linear temperature sensor A as an alerting signal generator, uses another linear temperature sensor B as another alerting signal generator; Described linear temperature sensor A, linear temperature sensor B are parallel to be set together; Described linear temperature sensor A outputs to the electrical quantity a of electric signal measurement device and the electrical quantity b inequivalence that linear temperature sensor B outputs to the electric signal measurement device;
Set a binary function f relevant with electrical quantity b with described electrical quantity a (a, b), (a is b) with the corresponding data input electrical signal measurement mechanism of described electrical quantity a and electrical quantity b with described binary function f; With a constant d input electrical signal measurement mechanism;
Make the electric signal measurement device gather the numerical value a1 of the electrical quantity a that obtains a certain moment and the numerical value b1 of electrical quantity b in real time, described electrical quantity a and electrical quantity b are respectively the electrical quantitys of two inequivalences of described linear temperature sensor A, linear temperature sensor B output;
Make the electric signal measurement device according to described numerical value a1 and numerical value b1 and the described binary function f (a that formerly imports, b) data operation produces an evaluation with binary function value f (a1, b1), this binary function value and described constant d are compared, according to comparative result, send fire alarm signal or do not send fire alarm signal by the electric signal measurement device.
A kind of alarm method of data fusion uses a linear temperature sensor A as an alerting signal generator, uses another linear temperature sensor B as another alerting signal generator; Described linear temperature sensor A, linear temperature sensor B are parallel to be set together; Described linear temperature sensor A outputs to the electrical quantity a of electric signal measurement device and the electrical quantity b inequivalence that linear temperature sensor B outputs to the electric signal measurement device;
Set one and variable a
T1, b
T1, a
T2, b
T2Relevant function f (a
T1, b
T1, a
T2, b
T2), this function f (a
T1, b
T1, a
T2, b
T2) and described variable a
T1, b
T1, a
T2, b
T2Become corresponding funtcional relationship, described variable a
T1, b
T1Be described electrical quantity a and electrical quantity b at the detected value in a moment, described variable a
T2, b
T2Be that described electrical quantity a and electrical quantity b are at another detected value constantly, with function f (a
T1, b
T1, a
T2, b
T2) and described variable a
T1, b
T1, a
T2, b
T2Corresponding data input electrical signal measurement mechanism; With a constant d input electrical signal measurement mechanism;
Make the collection of electric signal measurement device obtain the numerical value a1 of t1 electrical quantity a constantly and numerical value b1 and the numerical value a2 of t2 electrical quantity a constantly and the numerical value b2 of electrical quantity b of electrical quantity b; Make the electric signal measurement device according to numerical value a1, a2 and numerical value b1, b2 and the described function f (a of input formerly
T1, b
T1, a
T2, b
T2) data operation produce an evaluation with functional value f (a1, b1, a2, b2); The t2 moment and the time period of t1 between the moment are Δ t, Δ t=t2-t1; Described evaluation is compared with functional value and described constant d,, send fire alarm signal or do not send fire alarm signal by the electric signal measurement device according to comparative result.
Compared with the prior art the present invention has following advantage:
1, since the present invention with the electrical quantity signal combination of two kinds of inequivalences together, can eliminate the influence of length of being heated of the temperature sensing element of line-type heat detector to its fire alarm function, improve the warning accuracy of detector, and can reduce the rate of false alarm of detector effectively.
2, the temperature sensing element of the present invention's employing has reversibility, after finishing warning, and along with the releasing of alert, the recovery naturally of environment temperature, this temperature sensing element can recover its original state, so can reuse after reporting to the police.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
The structural representation of Fig. 1, traditional cable linear fire detector
The structural representation of Fig. 2, traditional air hose line style fire detector
The structural representation of Fig. 3, embodiments of the invention one
One of temperature sensing element structure among Fig. 4, the present invention synoptic diagram
Two synoptic diagram of the temperature sensing element structure among Fig. 5, the present invention
Three synoptic diagram of the temperature sensing element structure among Fig. 6, the present invention
Four synoptic diagram of the temperature sensing element structure among Fig. 7, the present invention
Five synoptic diagram of the temperature sensing element structure among Fig. 8, the present invention
Six synoptic diagram of the temperature sensing element structure among Fig. 9, the present invention
Seven synoptic diagram of the temperature sensing element structure among Figure 10, the present invention
Eight synoptic diagram of the temperature sensing element structure among Figure 11, the present invention
Nine synoptic diagram of the temperature sensing element structure among Figure 12, the present invention
Ten synoptic diagram of the temperature sensing element structure among Figure 13, the present invention
Figure 14, two parallel structural representations that are arranged that divide of temperature sensing element
The structural representation of Figure 15, two parallel compound settings of temperature sensing element
Embodiment
Embodiment one:
Referring to Fig. 3, composite line type temperature sensing fire detector of the present invention is made of a linear temperature sensor A, linear temperature sensor B, an electric signal measurement device 500; Described linear temperature sensor A, linear temperature sensor B are parallel to be set together; Described linear temperature sensor A, linear temperature sensor B respectively have at least one and survey body 501 and two electrical quantity signal output terminals 502, and described electrical quantity signal output terminal is electrically connected with the electric signal measurement device respectively; Described linear temperature sensor A, linear temperature sensor B output to the electrical quantity signal inequivalence of electric signal measurement device.
Temperature sensing element A among the present invention or temperature sensing element B can be structures (this figure has only shown the xsect of temperature sensing element, and vertically view omits) shown in Figure 4.This temperature sensing element is made of the parallel detection body 1 that is provided with of two wire, detection body 2, survey body 1 and survey between the body 2 thermo-sensitive material barrier layer 3 is arranged, the thermo-sensitive material barrier layer is the thermo-sensitive material of PTC or NTC or CTR characteristic, surveying body can be conductor or semiconductor, and it can be hollow or solid surveying body 1, survey body 2 or metal fibre is worked out.So-called parallel the setting be meant and survey body 1, survey body 2 or parallel to each other, or twine mutually (in twos mutually around or one around another), or one along the circumferential direction surrounded another and be coaxial configuration.The electrical quantity signal output terminal is equipped with in the end of surveying body, and this terminal has constituted the electrical quantity signal output terminal of temperature sensing element.In the present invention, article one, temperature sensing element has a pair of electrical quantity signal output terminal, article one, the two ends of surveying body can be provided with two electrical quantity signal output terminals, and a pair of electrical quantity signal output terminal also can only be set when surveying temperature sensing element of the common formation of body for two.Resistance or electric capacity when temperature sensing element is heated between the electrical quantity signal output terminal change.The thermo-sensitive material of ptc characteristics is meant that material has ptc characteristics in the present invention, and the thermo-sensitive material of NTC characteristic is meant that material has negative temperature coefficient feature, and the thermo-sensitive material of CTR characteristic is meant that material has the critical temperature characteristic.
Temperature sensing element A among the present invention or B also can be structures (this figure has only shown the longitudinal profile of temperature sensing element, and xsect omits) shown in Figure 5.This temperature sensing element is made of the parallel detection body 4,5 that is provided with of a pair of wire, article two, survey between the body and be provided with insulation course 6, article two, surveying among the body at least one is wire temperature-sensitive material bodies, wire temperature-sensitive material bodies has PTC or NTC or CTR characteristic, surveying body is hollow or solid or works out, parallel setting is meant surveys body 4,5 or parallel to each other, or twine mutually (in twos mutually around or one around another), or one along the circumferential direction surrounded another and be coaxial configuration.Article two, an end of surveying body connects with terminal resistance R (R=0～300M Ω), article two, the pair of terminal 502,503 of surveying the other end of body has been formed the electrical quantity signal output terminal of temperature sensing element, and resistance or electric capacity when temperature sensing element is heated between the signal output terminal change.
Temperature sensing element A among the present invention or B can be structures (this figure has only shown the xsect of temperature sensing element, and vertically view omits) shown in Figure 6.This temperature sensing element is made of the parallel detection body that is provided with of a pair of wire, survey between the body 7,8 and be parallel with a plurality of thermal resistances 9, thermal resistance is the thermal resistance of PTC or NTC or CTR characteristic, surveying body can be conductor or semiconductor, surveying body can be hollow or solid or work out, article two, survey body or parallel to each other, or twine mutually (in twos mutually around or one around another), or one along the circumferential direction surrounded another and be coaxial configuration.Article two, each terminal of surveying body has been formed a pair of signal output terminal of temperature sensing cable, and resistance or electric capacity when temperature sensing element is heated between the signal output terminal change.Described thermal resistance can be metal fever resistance or semiconductor heat resistance (germanium thermal resistance, silicon thermal resistance, carbon are thermal resistance, thermistor).
Temperature sensing element A among the present invention or B also can be structures (this figure has only shown the longitudinal profile of temperature sensing element, and xsect omits) shown in Figure 7.This temperature sensing element constitutes (surveying body can be conductor or semiconductor or thermal resistance serial connection body) by the parallel detection body that is provided with of a pair of wire, article two, survey body 10, insulation course 12 is arranged between 11, survey body 10, among 11 at least one form for a plurality of thermal resistance R1 serial connections, thermal resistance is the thermal resistance with PTC or NTC or CTR characteristic, article two, an end of surveying body connects with terminal resistance R (R=0～300M Ω), article two, the pair of terminal of surveying the other end of body has been formed the signal output terminal of temperature sensing cable, and resistance or electric capacity when temperature sensing element is heated between the signal output terminal change.Described thermal resistance can be metal fever resistance or semiconductor heat resistance (germanium thermal resistance, silicon thermal resistance, carbon are thermal resistance, thermistor).
Temperature sensing element A among the present invention or B can also be structures (this figure has only shown the longitudinal profile of temperature sensing element, and xsect omits) shown in Figure 8.Present embodiment is the continuous thermocouple type temperature sensing cable of a kind of FTLD or CTTC.Described temperature sensing element is made of the parallel detection body that is provided with of a pair of wire (surveying body can be conductor or semiconductor or thermocouple wire) 13,14, article two, among being arranged between the detection body, NTC or PTC or 15, two detections of CTR thermo-sensitive material barrier layer body have at least one to be thermocouple wire.Article two, each terminal of surveying body has been formed a pair of electrical quantity signal output terminal of temperature sensing element, and voltage when temperature sensing element is heated between the electrical quantity signal output terminal or resistance or electric capacity change.Described thermocouple wire is meant and constitutes thermopair two in extremely.Present embodiment is the continuous thermocouple type temperature sensing cable of a kind of FTLD or CTTC.
Temperature sensing element A among the present invention or B can also be structures (this figure has only shown the longitudinal profile of temperature sensing element, and xsect omits) shown in Figure 9.Present embodiment is the continuous thermocouple type temperature sensing cable of a kind of FTLD or CTTC.Described temperature sensing element constitutes (surveying body can be conductor or semiconductor or thermocouple wire) by the parallel detection body that is provided with of a pair of wire, survey between the body 16,17 insulating material barrier layer 18 is arranged, article two, have at least one to be thermocouple wire among surveying body, article two, each terminal of surveying body has been formed a pair of electrical quantity signal output terminal of temperature sensing element, and voltage when temperature sensing element is heated between the electrical quantity signal output terminal or resistance or electric capacity change.Voltage or electric capacity when temperature sensing element is heated between the signal output terminal change.
Temperature sensing element A among the present invention or B can also be structures (this figure has only shown the longitudinal profile of temperature sensing element, and xsect omits) shown in Figure 10.Described temperature sensing element is made of a wire temperature-sensitive materials detection body 19, wire temperature-sensitive material bodies has PTC or NTC or CTR characteristic, surveying body is hollow or solid or works out, the two ends of described detection body respectively are provided with an electrical quantity signal output terminal, and resistance or electric capacity when temperature sensing element is heated between two electrical quantity signal output terminals change.
Temperature sensing element A among the present invention or B also can be structures (this figure has only shown the longitudinal profile of temperature sensing element, and xsect omits) shown in Figure 11.Described temperature sensing element constitutes wire by a plurality of thermal resistance Rf serial connections and surveys body 20, thermal resistance is the thermal resistance with PTC or NTC or CTR characteristic, described detection body 20 is hollow or solid or works out, the two ends of described detection body respectively are provided with an electrical quantity signal output terminal, and resistance or electric capacity when temperature sensing element is heated between two electrical quantity signal output terminals change.Described thermal resistance can be metal fever resistance or semiconductor heat resistance (germanium thermal resistance, silicon thermal resistance, carbon are thermal resistance, thermistor).
Temperature sensing element A among the present invention or B also can be structures (this figure has only shown the longitudinal profile of temperature sensing element, and xsect omits) shown in Figure 12.This temperature sensing element belongs to the linear temperature sensor of ultrasound wave principle.Constitute detection body 21 by a solid filament (can be that metal also can be nonmetal), described detection body 21 is hollow or solid or works out, one end of described detection body 21 (or a side) is equipped with ultrasonic transmission/reception measures conversion equipment 600, the ultrasonic propagation velocity of surveying between body 21 two ends when temperature sensing element is heated changes, or the ultrasonic resonance frequency of surveying between body 21 two ends (natural frequency) changes.Above-mentioned variable quantity can convert electric signal to by described ultrasonic transmission/reception measurement conversion equipment and carry out fire alarm.
Temperature sensing element A among the present invention or B also can be structures (this figure has only shown the longitudinal profile of temperature sensing element, and xsect omits) shown in Figure 13.This temperature sensing element belongs to the linear temperature sensor of quartz crystal alternating current resonance principle, the detection body 22 that constitutes by a quartzy crystalline fiber, described detection body 22 is hollow or solid or works out, a quartz crystal measurement mechanism 700 is installed at the two ends of described detection body 22, alternating current resonant frequency (natural frequency) when temperature sensing element is heated between the two ends of detection body 22 changes, and this variable quantity can convert electric signal to by above-mentioned quartz crystal AC measurment conversion equipment and carry out fire alarm.
Temperature sensing element A among the present invention or B can also be the air hoses of air hose line style heat detector.
Parallel being set together of described in the present invention two temperature sensing element A, B is meant that in the installation or lab investigation of reality, the length of being heated of two temperature sensing elements is corresponding: about equally or proportional.For example:
Mode one: described linear temperature sensor A, linear temperature sensor B can walk abreast and separately be set together, and promptly the distance between the center line of two temperature sensing elements and is not more than 3 meters about equally, as shown in figure 14.Every temperature sensing element can be straight line, curve or wave setting.
Two: two temperature sensing elements of mode are parallel in conjunction with being set together, i.e. two temperature sensing elements or parallel to each other, or twine mutually (one twine another or in twos mutually around), or one be hollow-core construction, the outside that is sleeved on another is coaxial configuration.
Mode three: described linear temperature sensor A, linear temperature sensor B compound being set together that can walk abreast, as shown in figure 15, shared one of described linear temperature sensor A, linear temperature sensor B survey body.Promptly two shared one of temperature sensing elements are surveyed body 24, a pair of detection body 23,24 has constituted temperature sensing element A with the thermo-sensitive material barrier layer 25 (or thermal resistance of insulating material barrier layer or access in parallel) that is arranged between the two, a pair of detection body 24,26 has constituted temperature sensing element B with the thermo-sensitive material barrier layer 27 (or thermal resistance of insulating material barrier layer access in parallel) that is arranged between the two, and surveying body can be linear conductor or wire semiconductor or wire thermocouple wire or wire temperature-sensitive material bodies.
Among the present invention, the electrical quantity signal of described temperature sensing element can be voltage signal, current signal, resistance signal, capacitance signal, inductance signal, time constant, natural frequency signals such as (resonant frequencies) or above-mentioned signal rate over time, local or when all being heated when temperature sensing element, the size of electrical quantity signal changes, can according to the size of electrical quantity signal or electrical quantity signal over time the size of rate carry out constant temperature or differential temperature is reported to the police.
Among the present invention, described electric signal measurement device is instrument or the instrument that is used for measuring voltage, resistance, electric current, electric capacity, discharges and recharges signals such as time or oscillation frequency, also can be called boxcar, microcomputer head, microcomputer modulator or detection module etc.
Embodiment two:
A kind of alarm method of data fusion uses a linear temperature sensor A as an alerting signal generator, uses another linear temperature sensor B as another alerting signal generator; Described linear temperature sensor A, linear temperature sensor B are parallel to be set together; Described linear temperature sensor A outputs to the electrical quantity a of electric signal measurement device and the electrical quantity b inequivalence that linear temperature sensor B outputs to the electric signal measurement device;
Set a binary function f relevant with electrical quantity b with described electrical quantity a (a, b), (a is b) with the corresponding data input electrical signal measurement mechanism of described electrical quantity a and electrical quantity b with described binary function f; With a constant d input electrical signal measurement mechanism;
Make the electric signal measurement device gather the numerical value a1 of the electrical quantity a that obtains a certain moment and the numerical value b1 of electrical quantity b in real time, described electrical quantity a and electrical quantity b are respectively the electrical quantitys of two inequivalences of described linear temperature sensor A, linear temperature sensor B output;
Make the electric signal measurement device according to described numerical value a1 and numerical value b1 and the described binary function f (a that formerly imports, b) data operation produces an evaluation with binary function value f (a1, b1), this binary function value and described constant d are compared, according to comparative result, send fire alarm signal or do not send fire alarm signal by the electric signal measurement device.
The temperature sensing element that present embodiment uses can be the temperature sensing element described in the embodiment one.
In the present embodiment, described electric signal measurement device merges the electrical quantity signal of two inequivalences and carries out fire alarm according to fusion results.The fusion of the electrical quantity signal of described two inequivalences can be that physical quantity merges.The fusion of the electrical quantity signal of described two inequivalences can be a data fusion.
In the present embodiment, to described temperature sensing element A, two electrical quantity signals of temperature sensing element B merge and report to the police according to fusion results and are meant: the electric signal measurement device is not according to temperature sensing element A, temperature sensing element B reports to the police as the result of the simple logic computing of the comparative result of the fire alarm threshold values of fire detector separately, promptly be not according to temperature sensing element A reports a fire and temperature sensing element B reports a fire two alarming result " with " or " or " logic operation result carries out fire alarm, for example, make up by a linear temperature sensor rate-of-rise detector that constitutes and the fixed temperature detector that constitutes by another linear temperature sensor, form a line style different constant temperature fire detector, the type of alarm of this line style different constant temperature fire detector just belongs to according to temperature sensing element A, the logic operation result of the alarming result separately of temperature sensing element B is carried out the method for fire alarm.The electrical quantity signal of described temperature sensing element A, B merges the method a lot (referring to " multisensor data fusion and application ") of warning, is exemplified below:
Method one: with described temperature sensing element A, the signal output terminal of a temperature sensing element among the temperature sensing element B inserts in the mode of series connection in the testing circuit of electrical quantity of signal output terminal of described another temperature sensing element, the variation of the electrical quantity of last temperature sensing element will cause the variation of sampled value of the electrical quantity of a back temperature sensing element, promptly two electrical quantitys carry out physical quantity and merge, and in fact the testing result of the electrical quantity of a back temperature sensing element is exactly the testing result after the electrical quantity of two temperature sensing elements merges; The electric signal measurement device carries out fire alarm according to the detection numerical value after merging and the comparative result of its alarming threshold value;
Method two: the signal output terminal of a temperature sensing element among described temperature sensing element A, the temperature sensing element B is inserted in parallel in the testing circuit of electrical quantity of described another temperature sensing element, the variation of the electrical quantity of last temperature sensing element will cause the variation of detected value of the electrical quantity of back one temperature sensing element, promptly two electrical quantitys carry out physical quantity and merge, and in fact the testing result of the electrical quantity of a back temperature sensing element is exactly the testing result after the electrical quantity of two temperature sensing elements merges; The electric signal measurement device carries out fire alarm according to the detection numerical value after merging and the comparative result of its alarming threshold value;
Method three: the electric signal measurement device is gathered in real time electrical quantity (or electrical quantity signal rate) the over time a of two temperature sensing elements, b, by described electric signal measurement device according to the electrical quantity a that records, the data of b reach the warning parameter f (a that is input in advance in the electric signal measurement device, b) with electrical quantity a, the relation data of b, computing produces a warning parameter f (a, b) fixed number value really, promptly two electrical quantitys carry out data fusion, the warning parameter f that the electric signal measurement device produces according to data fusion (a, b) comparative result with its alarming threshold value d carries out fire alarm;
Method four: the electric signal measurement device is gathered in real time electrical quantity (or electrical quantity signal rate) the over time a of described temperature sensing element, b, the size of the electrical quantity of a temperature sensing element that obtains according to detection by described electric signal measurement device and be input to program in the electric signal measurement device in advance, the testing circuit of the electrical quantity of another temperature sensing element of real time altering (is promptly regulated the resistance in the detection line, electric capacity, electric current, the size of electrical quantitys such as supply voltage), the variation of the electrical quantity of last temperature-sensing element (device) causes the variation of detected value of the electrical quantity of a back temperature sensing element indirectly, in fact the testing result of electrical quantity of the temperature sensing element in back is exactly the testing result after the electrical quantity of two temperature sensing elements merges, and the electric signal measurement device carries out fire alarm according to the detection numerical value after merging and the comparative result of its alarming threshold value; The data fusion that above-mentioned fusion process is actually two electrical quantitys combines with the physical quantity fusion.
In the present embodiment, the described a certain moment is meant the once sampling pairing moment of electric signal measurement device in two electrical quantity a, b of two temperature sensing elements being gathered in real time by certain time interval according to the programmed instruction of setting, because this measurement belongs to the category of static measurement, the so-called moment does not also require it is an absolute moment, can allow the regular hour sluggishness.During actual enforcement, can be with two sampling channels, two electrical quantitys to two inequivalences of two temperature sensing elements carry out while or time sharing sampling, also can be with a sampling channel, earlier, sample respectively to the electrical quantity of two inequivalences of two linear temperature sensors in the back, the time interval of elder generation's post-sampling can be set as required, the accuracy and the response speed that influence fire alarm not produce excessive hysteresis are precondition, although the sampling instant of two electrical quantitys of inequivalence may be different, can think synchronization.In order to improve the reliability of warning, can carry out the digital filtering processing to the electrical quantity a or the b in a certain moment, promptly at computing f (a, b) electrical quantity a that uses in or the numerical value of b can also be respectively the mean value (can reject the bigger sampled value of some dispersivenesses when calculating mean value) of the numerical value of sampling several times in a certain little time period, the numerical value of electrical quantity a or b can be the mean value of sampling numerical value of two electrical quantitys of the temperature sensing element of same time period, also can be the mean value of sampling numerical value of two electrical quantitys of different time sections, but the interval of two time periods unsuitable excessive (should not above 30 seconds) be in order to avoid influence the accuracy and the response speed of fire alarm; (also can adopt this mode: one of them numerical value is a sampled value for a, b) middle electrical quantity a that uses or the numerical value of b, and another numerical value is the mean value of the numerical value of sampling several times in the time period at computing f.
In the present embodiment, the temperature T of the heated portion of described linear temperature sensor (or temperature rise rate T ') can be the actual temperature (or temperature rise rate T ') of the heated portion of linear temperature sensor, also can be the temperature (or temperature rise rate T ') of the hot-air that centers on of the appearance of the heated portion of linear temperature sensor, have certain functional relation between these two temperature (or temperature rise rate T ').Ignore the difference between the temperature (or temperature rise rate T ') of the hot-air that the appearance of the heated portion of the actual temperature (or temperature rise rate T ') of heated portion of the linear temperature sensor that heat transfer process causes and linear temperature sensor centers on, can be similar to and think the big or small identical of above-mentioned two temperature (or temperature rise rate T ').In lab investigation, the temperature (or temperature rise rate T ') of each section of the heated portion of linear temperature sensor evenly equates usually.In the fire test of reality, the temperature of each section of the heated portion of linear temperature sensor (or temperature rise rate T ') is not necessarily evenly equal, but can be the temperature (or temperature rise rate T ') of the mean value of the temperature (or temperature rise rate T ') of the different sections of the heated portion of linear temperature sensor as the heated portion of linear temperature sensor.
Described operation result f (a1, the mode that numerical value b1) and described constant d compare warning has five kinds: (a1's f reports to the police during b1) greater than d; (a1's f reports to the police during b1) less than d; (a1's f reports to the police during b1) more than or equal to d; (a1's f reports to the police when b1) being less than or equal to d; (a1's f reports to the police when b1) equaling d.
In the present embodiment, (a b) is a warning parameter to described binary function f, and described constant d is warning parameter f (a, alarming threshold value b).F (a, b) become corresponding funtcional relationship with electrical quantity a, b, its funtcional relationship can provide with forms such as tabulation, formula or curves, the size of funtcional relationship that it is concrete and alarming threshold value d can according to the theoretical analysis and calculation result or the result be tested in the detector test or empirical data waits to determine, is precondition with the action experiment test by the line style detector with the experiment test of being failure to actuate.Illustrate below how to determine f (a, the method step of concrete form b) and the concrete numerical value of d:
One of for example:
(a b) is the temperature T of the heated portion of linear temperature sensor, i.e. T=f (a to set f, b), like this according to a1, the b1 in a certain moment of recording, (a1, concrete numerical value b1) are the sizes of temperature T 1 of the line-type heat detector heated portion in this moment to the f that computing obtains; It is a temperature value that concrete constant temperature is reported to the police that setting is input to alarming threshold value d in the electric signal measurement device, as 85 ℃ or 105 ℃, also can be 85 ℃, 105 ℃ combination, as f (a, once report to the police during b) more than or equal to 85 ℃, carry out secondary during more than or equal to 105 ℃ and report to the police.
The following describes f (a, procurement process b):
Under the certain condition of the use length L m of linear temperature sensor and residing environment temperature Ti, electrical quantity a, b depend on the temperature T of be heated length L and the heated portion of linear temperature sensor A, B, can be by carrying out a series of experiments under various be heated length and the various heating temperatures, record a series of data of electrical quantity a, b, these data are carried out analyzing and processing and curve fitting with the method for regretional analysis, can obtain the funtcional relationship of temperature T of the be heated length L and the heated portion of electrical quantity a, b and linear temperature sensor:
a＝f1(L，T) (1)
b＝f2(L，T) (2)
The mode that above-mentioned relation formula (1) and (2) also can combine with experimental data by the mode or the Theoretical Calculation of Theoretical Calculation obtains, and relational expression (1) and (2) have constituted one with L, and T is the equation with two unknowns group of unknown number;
By Substitution method or method of elimination above-mentioned system of equations is found the solution, is tried to achieve the formula that embodies of temperature T of the heated portion of linear temperature sensor:
T＝f(a，b) (3)
Measuring the concrete numerical value a1 of a, b, behind the b1, with a1, b1 substitution formula (3) can be in the hope of the actual temp T1 of correspondence; Try to achieve the concrete length L 1 of being heated according to formula (1) or (2) again.
For mounted linear temperature sensor A, a B, its length L m fixes, it is constant that the residing environment temperature Ti of linear temperature sensor is difficult to, may change to some extent, the variation of Ti can influence by said method carries out the accuracy that constant temperature is reported to the police, and in this case, an ambient temperature measurement element can be inserted the electric signal measurement device, to revise the influence of environment variation of temperature to alarm temperature, concrete grammar is as follows:
The warning parameter changes with the variation of the residing environment temperature Ti of linear temperature sensor, be T=f (a, b, Ti), different environment temperature correspondences the value of different warning parameters, by the electric signal measurement device according to the warning parameter f (a that is input in advance wherein, b, Ti) with the data of the Ti funtcional relationship of environment temperature, a, the b that obtains according to real-time detection, the concrete data of Ti, the concrete numerical value of warning parameter is tried to achieve in computing.Environment temperature can adopt the mode of spot measurement, also the mode that can adopt the diverse location multimetering to average.Can ignore the influence of environment temperature Ti to the temperature T of heated portion under following situation: the variation of the residing environment temperature Ti of linear temperature sensor is very little; The variation of the residing environment temperature Ti of linear temperature sensor is very little to the influence of electrical quantity a, the b of A, two temperature sensing elements of B; The residing environment temperature Ti of linear temperature sensor (usually between 15 ℃ ~ 35 ℃) compares very little with the alarm temperature T that sets.
Alarming threshold value d also can be a relative constant, the numerical value that is d can change with the variation of the residing environment temperature Ti of linear temperature sensor, ambient humidity Hi, be that different environment temperature correspondences different constant temperature alarming threshold values, when for example environment temperature Ti is less than 25 ℃, d=85 ℃; Ti is during greater than 25 ℃, the every rising of environment temperature Ti once, alarm temperature d was once improving.According to the data that are input to wherein alarming threshold value d and the Ti funtcional relationship of environment temperature in advance, according to the concrete data of the Ti of real-time detection acquisition, the concrete numerical value of d is tried to achieve in computing by the electric signal measurement device.
Alarming threshold value d also can change according to the difference of the length of being heated of linear temperature sensor, and the promptly different length correspondences of being heated different constant temperature alarming threshold values, when the length of for example being heated is one meter, and d=85 ℃; The length of being heated less than ten meters greater than one meter, one meter of every increase, alarming threshold value d reduces by 0.5 ℃; The length of being heated surpasses ten meters, and alarming threshold value d remains unchanged.
Alarming threshold value d also can change according to the be heated difference of different and residing environment temperature Ti ambient humidity Hi of length L of linear temperature sensor, and promptly d is the function of L, Ti, Hi.When some parameters in L, Ti, Hi remained unchanged, d was the function of remaining parameter.
For example two:
(a b) is the temperature rise rate T ' of linear temperature sensor A, B heated portion, i.e. T '=f (a to set f, b), according to a1, the b1 in a certain moment that records in real time, (a1, concrete numerical value b1) are the temperature rise rate T ' of the heated portion of linear temperature sensor to the f that computing obtains like this; It is a temperature rise rate value that concrete differential temperature is reported to the police that setting is input to alarming threshold value d in the electric signal measurement device, as 10 ℃/min., 20 ℃/min., 30 ℃/min. etc., it also can be the combination of 10 ℃/min., 20 ℃/min., as f (a, once report to the police during b) more than or equal to 10 ℃/min., carry out secondary during more than or equal to 20 ℃/min. and report to the police.
The following describes f (a, procurement process b):
At linear temperature sensor A, the use length L m of B, residing environment temperature Ti, under the certain condition of the temperature T of heated portion, electrical quantity a, b depends on the temperature speed T ' of the be heated length L and the heated portion of linear temperature sensor, can be by carrying out the various length of being heated, a series of experiments under the various temperature rise rates, record electrical quantity a, a series of data of b, data are carried out analyzing and processing and curve fitting with the method for regretional analysis, can obtain electrical quantity a, the funtcional relationship of the temperature speed T ' of the be heated length L and the heated portion of b and linear temperature sensor:
a＝f1(L，T’) (4)
b＝f2(L，T’) (5)
The mode that above-mentioned relation formula (4) and (5) also can combine with experimental data by the mode or the Theoretical Calculation of Theoretical Calculation obtains, and relational expression (4) and (5) have constituted one with L, and T ' is the equation with two unknowns group of unknown number;
By Substitution method or method of elimination above-mentioned system of equations is found the solution, is tried to achieve the formula that embodies of temperature speed T ' of the heated portion of linear temperature sensor:
T’＝f(a，b) (6)
Measuring the concrete numerical value a1 of a, b, behind the b1, with a1, b1 substitution formula (6) can be in the hope of the actual temp T1 ' of correspondence; Try to achieve the concrete length L 1 of being heated according to formula (4) or (5) again.
For mounted linear temperature sensor A, a B, it uses length L m to fix, residing environment temperature Ti is not constant, the variation of Ti can influence by said method carries out the accuracy that differential temperature is reported to the police, in this case, one ambient temperature measurement element can be inserted the electric signal measurement device, to revise the influence that the environment variation of temperature is reported to the police to differential temperature, concrete grammar is as follows:
The warning parameter changes with the variation of the residing environment temperature Ti of linear temperature sensor, be T '=f (a, b, Ti), different environment temperature correspondences the value of different warning parameters, by the electric signal measurement device according to the warning parameter f (a that is input in advance wherein, b, Ti) with the data of the Ti funtcional relationship of environment temperature, a, the b that obtains according to real-time detection, the concrete data of Ti, the concrete numerical value of warning parameter is tried to achieve in computing.Environment temperature can adopt the mode of spot measurement, also the mode that can adopt the diverse location multimetering to average.Can ignore the influence of environment temperature Ti to the temperature rise rate T ' of heated portion under following situation: residing environment temperature Ti is more constant for linear temperature sensor; The variation of the residing environment temperature Ti of linear temperature sensor is very little to the influence of electrical quantity a, the b of A, two temperature sensing elements of B; The alarming threshold value of the T ' that sets is very big.
The warning parameter also can change with the variation of the temperature T of the heated portion of linear temperature sensor, be T '=f (a, b, T), the temperature T correspondence of different heated portions the value of different warning parameters, can be by the electric signal measurement device according to the warning parameter f (a, the b that are input in advance wherein, T) with the data of the funtcional relationship of the temperature T of heated portion, a, the b that obtains according to real-time detection, the concrete data operation of T are tried to achieve the concrete numerical value of warning parameter.
The warning parameter also can be simultaneously changes with the temperature T of the heated portion of linear temperature sensor, the variation of residing environment temperature Ti, promptly T '=f (a, b, T, Ti).
Give an example two in, electrical quantity a, b are respectively electrical quantitys of rate of change in time, the size of a, b can directly detect and draw, also can obtain indirectly, promptly by detect respectively and calculate in the time period Δ t=t2-t1 that sets, obtain with the variable quantity of corresponding two electrical quantitys of electrical quantity a, b (pairing two electrical quantitys were respectively Ω, V when for example a, b were respectively Ω/s, V/s), that is to say, rate of change a, b in fact be exactly in regular hour section Δ t, with the variable quantity of electrical quantity a, the corresponding electrical quantity of b.The time period Δ t of described setting can equal line-type heat detector and move the alarm time section in when experiment, also can equal given as required section At All Other Times.Used time period Δ t can be the same time period when calculating a or b, also can be the different time periods.Length corresponding to the time period Δ t of two electrical quantitys of temperature sensing element A, B when calculating the numerical value of a or b should be identical as far as possible, the time interval between time period should reduce as far as possible, and determining of time period Δ t should be precondition to guarantee that detector detects by the action experiment detection and the experiment of being failure to actuate.
Alarming threshold value d also can be a relative constant, promptly can change according to the Ti of the residing environment temperature of linear temperature sensor, the difference of ambient humidity Hi, be that different environment temperature correspondences different differential temperature alarming threshold values, when for example environment temperature Ti is less than 25 ℃, d=10 ℃/min.; Ti is during greater than 25 ℃, the every rising of environment temperature Ti once, alarming threshold value d improves 1 ℃/min..
Alarming threshold value d also can change according to the difference of the length L of heated portion, and the promptly different length correspondences of being heated different differential temperature alarming threshold values, when the length of for example being heated is one meter, and 10 ℃/min.; The length of being heated less than ten meters greater than one meter, one meter of every increase, alarming threshold value d reduces by 0.5 ℃/min.; The length of being heated surpasses ten meters, and alarming threshold value d remains unchanged.
Alarming threshold value d can also change according to the difference of the temperature T of heated portion, and the temperature T correspondence of promptly different heated portions different differential temperature alarming threshold values.The acquisition of temperature T is referring to for example description in.
In sum, alarming threshold value d can be the function of L, Ti, Hi, T, and alarming threshold value d also can be according to the difference of Ti, the ambient humidity Hi of the different and residing environment temperature of the temperature T of the difference of the length L of the heated portion of linear temperature sensor, heated portion and difference.When some parameters in L, Ti, T, Hi remained unchanged, d was the function of remaining parameter.
Embodiment three:
A kind of alarm method of data fusion uses a linear temperature sensor A as an alerting signal generator, uses another linear temperature sensor B as another alerting signal generator; Described linear temperature sensor A, linear temperature sensor B are parallel to be set together; Described linear temperature sensor A outputs to the electrical quantity a of electric signal measurement device and the electrical quantity b inequivalence that linear temperature sensor B outputs to the electric signal measurement device;
Set one and variable a
T1, b
T1, a
T2, b
T2Relevant function f (a
T1, b
T1, a
T2, b
T2), this function f (a
T1, b
T1, a
T2, b
T2) and described variable a
T1, b
T1, a
T2, b
T2Become corresponding funtcional relationship, described variable a
T1, b
T1Be described electrical quantity a and electrical quantity b at the detected value in a moment, described variable a
T2, b
T2Be that described electrical quantity a and electrical quantity b are at another detected value constantly, with function f (a
T1, b
T1, a
T2, b
T2) and described variable a
T1, b
T1, a
T2, b
T2Corresponding data input electrical signal measurement mechanism; With a constant d input electrical signal measurement mechanism;
Make the collection of electric signal measurement device obtain the numerical value a1 of t1 electrical quantity a constantly and numerical value b1 and the numerical value a2 of t2 electrical quantity a constantly and the numerical value b2 of electrical quantity b of electrical quantity b; Make the electric signal measurement device according to numerical value a1, a2 and numerical value b1, b2 and the described function f (a of input formerly
T1, b
T1, a
T2, b
T2) data operation produce an evaluation with functional value f (a1, b1, a2, b2); The t2 moment and the time period of t1 between the moment are Δ t, Δ t=t2-t1; Described evaluation is compared with functional value and described constant d,, send fire alarm signal or do not send fire alarm signal by the electric signal measurement device according to comparative result.
Among the present invention, described linear temperature sensor A outputs to the electrical quantity a of electric signal measurement device and electrical quantity b inequivalence that linear temperature sensor B outputs to the electric signal measurement device is meant: linear temperature sensor is heated under the uncertain condition of length, line type fire detector is experimentized in the intensification or cooling test of chamber and actual fire, each of detected electrical quantity a and electrical quantity b a series of data constantly do not constitute certain functional relation, a ≠ f1 (b) or b ≠ f2 (a) promptly can not be tried to achieve the b1 (or a1) in this moment according to the numerical value a1 (or b1) in electrical quantity a (or electrical quantity b) a certain moment by the funtcional relationship of determining.Article one, a pair of signal output terminal of temperature sensing element can be exported electrical quantity signal not of the same race, it specifically is which kind of signal, depend on the signal kinds that the electric signal measurement device of temperature sensing element is received, the electrical quantity signal of temperature sensing element is meant the electrical quantity signal that is used for fire alarm that the electric signal measurement device is detected in the present embodiment.In the present embodiment, why requiring the electrical quantity signal inequivalence of two temperature sensing elements, is because have only in this case, just can merge the size of two electrical quantity signal a, b and produce a warning parameter, and principle is as follows:
Under the situation of the use length L m of temperature sensing element and the residing environment temperature Ti of detector certain (perhaps ignoring the influence of variation of ambient temperature), electrical quantity a, b depend on the length L and the temperature T (or temperature rise rate T ') of the heated portion of temperature sensing element respectively, be a=f1 (L, T) (or a=f1 (L, T '), b=f2 (L, T) (or b=f2 (L, T '); When the electrical quantity signal inequivalence of two temperature sensing elements, above-mentioned two is that the equation with two unknowns of unknown number constitutes one the equation with two unknowns group of separating is arranged with L, T (or T '), behind the concrete numerical value of having determined a, b, can determine out the concrete numerical value of L, T (or T '), the size of L, T (or T ') has been represented the scale of fire and the degree of fire respectively, temperature sensing element mainly carries out constant temperature according to the size of T reports to the police, and carries out differential temperature according to the size of T ' and reports to the police.
Realize that the electrical quantity a of two temperature sensing elements and the mode of electrical quantity b inequivalence have:
Mode one: the type difference of selected two temperature sensing element A, B, NTC temperature sensing element type, electric thermo-couple temperature induction element type, generally dissimilar temperature sensing element inequivalences;
Mode two: the type of the first A of two selected temperature perception, B spare is identical, but electrical quantity is with variation of temperature rate (also claiming temperature coefficient) difference, the content difference of for example kind difference of the conductive filler in the NTC type temperature sensing element, or conductive filler all can cause NTC type temperature sensing element to have different temperature-coefficient of electrical resistances;
Mode three: selected two temperature sensing element A, B are physically identical, but the type difference of the electrical quantity of the temperature sensing element that the electric signal measurement device is measured, for example A, B all select same thermocouple type temperature sensing element for use, the electric signal measurement measurement device is two of the temperature sensing element resistance signals of surveying between the bodies wherein, measure two of another temperature sensing element and survey between the bodies and be subjected to thermogenetic voltage signal; Again for example, A, B all select NTC type temperature sensing element for use, and the electric signal measurement measurement device is two resistance signals of surveying between the body of a temperature sensing element wherein, measure two capacitance signals of surveying between the body of another temperature sensing element; Under the situation of identical temperature sensing element,, also can realize the inequivalence of two temperature sensing elements owing to the different electrical quantity of the same temperature sensing element of electric signal measurement measurement device.
Claims (10)
1, a kind of composite line type temperature sensing fire detector is characterized in that: be made of a linear temperature sensor A, linear temperature sensor B, an electric signal measurement device; Described linear temperature sensor A, linear temperature sensor B are parallel to be set together; Described linear temperature sensor A, linear temperature sensor B respectively have at least one and survey body and two electrical quantity signal output terminals, and described electrical quantity signal output terminal is electrically connected with the electric signal measurement device respectively; Described linear temperature sensor A, linear temperature sensor B output to the electrical quantity signal inequivalence of electric signal measurement device.
2, composite line type temperature sensing fire detector according to claim 1 is characterized in that: described linear temperature sensor A, linear temperature sensor B can walk abreast and separately be set together.
3, composite line type temperature sensing fire detector according to claim 1 is characterized in that: described linear temperature sensor A, linear temperature sensor B can walk abreast in conjunction with being set together.
4, composite line type temperature sensing fire detector according to claim 1, it is characterized in that: described linear temperature sensor A, linear temperature sensor B compound being set together that can walk abreast, shared one of described linear temperature sensor A, linear temperature sensor B survey body.
5, composite line type temperature sensing fire detector according to claim 1 is characterized in that: the electrical quantity signal of described linear temperature sensor A, linear temperature sensor B output can be voltage signal, current signal, resistance signal, capacitance signal, inductance signal, resonance frequency signal, time constant.
6, composite line type temperature sensing fire detector according to claim 1 is characterized in that: described electric signal measurement device merges the electrical quantity signal of two inequivalences and carries out fire alarm according to fusion results.
7, a kind of alarm method of data fusion is characterized in that: use a linear temperature sensor A as an alerting signal generator, use another linear temperature sensor B as another alerting signal generator; Described linear temperature sensor A, linear temperature sensor B are parallel to be set together; Described linear temperature sensor A outputs to the electrical quantity a of electric signal measurement device and the electrical quantity b inequivalence that linear temperature sensor B outputs to the electric signal measurement device;
Set a binary function f relevant with electrical quantity b with described electrical quantity a (a, b), (a is b) with the corresponding data input electrical signal measurement mechanism of described electrical quantity a and electrical quantity b with described binary function f; With a constant d input electrical signal measurement mechanism;
Make the electric signal measurement device gather the numerical value a1 of the electrical quantity a that obtains a certain moment and the numerical value b1 of electrical quantity b in real time, described electrical quantity a and electrical quantity b are respectively the electrical quantitys of two inequivalences of described linear temperature sensor A, linear temperature sensor B output;
Make the electric signal measurement device according to described numerical value a1 and numerical value b1 and the described binary function f (a that formerly imports, b) data operation produces an evaluation with binary function value f (a1, b1), this binary function value and described constant d are compared, according to comparative result, send fire alarm signal or do not send fire alarm signal by the electric signal measurement device.
8, the alarm method of data fusion according to claim 7, it is characterized in that: described constant d is a relative constant, and promptly d changes with at least one the variation in the length L Several Parameters of the temperature T of the residing environment temperature Ti of linear temperature sensor, ambient humidity Hi, heated portion, heated portion.
9, a kind of alarm method of data fusion is characterized in that: use a linear temperature sensor A as an alerting signal generator, use another linear temperature sensor B as another alerting signal generator; Described linear temperature sensor A, linear temperature sensor B are parallel to be set together; Described linear temperature sensor A outputs to the electrical quantity a of electric signal measurement device and the electrical quantity b inequivalence that linear temperature sensor B outputs to the electric signal measurement device;
Set one and variable a
T1, b
T1, a
T2, b
T2Relevant function f (a
T1, b
T1, a
T2, b
T2), this function f (a
T1, b
T1, a
T2, b
T2) and described variable a
T1, b
T1, a
T2, b
T2Become corresponding funtcional relationship, described variable a
T1, b
T1Be described electrical quantity a and electrical quantity b at the detected value in a moment, described variable a
T2, b
T2Be that described electrical quantity a and electrical quantity b are at another detected value constantly, with function f (a
T1, b
T1, a
T2, b
T2) and described variable a
T1, b
T1, a
T2, b
T2Corresponding data input electrical signal measurement mechanism; With a constant d input electrical signal measurement mechanism;
Make the collection of electric signal measurement device obtain the numerical value a1 of t1 electrical quantity a constantly and numerical value b1 and the numerical value a2 of t2 electrical quantity a constantly and the numerical value b2 of electrical quantity b of electrical quantity b; Make the electric signal measurement device according to numerical value a1, a2 and numerical value b1, b2 and the described function f (a of input formerly
T1, b
T1, a
T2, b
T2) data operation produce an evaluation with functional value f (a1, b1, a2, b2); The t2 moment and the time period of t1 between the moment are Δ t, Δ t=t2-t1; Described evaluation is compared with functional value and described constant d,, send fire alarm signal or do not send fire alarm signal by the electric signal measurement device according to comparative result.
10, the alarm method of data fusion according to claim 9, it is characterized in that: described constant d is a relative constant, and promptly d changes with at least one the variation in the length L Several Parameters of the temperature T of the residing environment temperature Ti of linear temperature sensor, ambient humidity Hi, heated portion, heated portion.
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| CN1987944A (en) | 2007-06-27 |
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