CN102507047A - Non-contact passive sensor signal testing system - Google Patents
Non-contact passive sensor signal testing system Download PDFInfo
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- CN102507047A CN102507047A CN2011102944803A CN201110294480A CN102507047A CN 102507047 A CN102507047 A CN 102507047A CN 2011102944803 A CN2011102944803 A CN 2011102944803A CN 201110294480 A CN201110294480 A CN 201110294480A CN 102507047 A CN102507047 A CN 102507047A
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Abstract
The invention discloses a non-contact passive sensor signal testing system, which is capable of running in various severe environments and solves the problem that signals of existing passive pressure sensors cannot be tested accurately remotely in environments with high temperature, moist and the like. The non-contact passive sensor signal testing system comprises a signal source, a testing circuit and a passive sensor, and is provided with a transmitting antenna and a testing antenna independent to each other, wherein the signal source transmits signals to the passive sensor through the transmitting antenna, and the testing circuit receives detection signals of the passive sensor through the testing antenna. Since the transmitting antenna and the testing antenna are separated from each other, interference of the signals from the terminal of the transmitting antenna to the signals of the testing terminal can be avoided, and the sensor signals can be tested within a certain range.
Description
Technical field
The present invention relates to a kind of wireless signal measurement system, relate in particular to a kind of non-contact passive sensor signal measuring system that works under the rugged surroundings such as high temperature, humidity.
Background technology
Passive sensor self does not have power supplies such as battery, thus by the outer signals source to its emittance that transmits.Passive sensor stores it with the emittance that receives and is used as working power, because its energy consumption is considerably less, and also can operate as normal with the faint emittance that absorbs.
Because little, the stable performance of passive sensor volume; Needing to be particularly suitable in the medical treatment and industrial environment of non-contact transmission energy and survey sensor signal, to measure intraocular pressure of glaucoma patient etc. such as: high-temp pressure sensor, pyrochemistry sensor, humidity sensor, in operation with the noncontact mode continuously and accurately.
Realize the wireless and passive measuring-signal, the test macro that can accurately measure just must be arranged.Mostly the test macro of the passive pressure sensor signal of measurement that is widely used at present is to be made up of signal source, antenna, test circuit and passive sensor.Wherein to receive detection signal employed to the emission of the signal of passive sensor and test circuit from passive sensor be same antenna to signal source; This antenna be the signal emitting antenna be again test wires; Both, also be used for the detection signal of receiving sensor simultaneously to the sensor emittance.There is certain drawback in this method in actual measurement, and signal emitting antenna and test antenna are same coil, will cause the interference of signal source to detection signal.When measuring distance was distant, with regard to fainter detection signal, the interference meeting that the transmitting terminal signal source produces was more obvious for original.
Summary of the invention
To above-mentioned defective of the prior art; The present invention is in order to improve the accuracy of measurement of existing wireless sourceless sensor signal test system; Solve its measuring distance weak point and test signal and receive the more serious problem of signal source interference ratio, proposed a kind of novel non-contact passive sensor signal test macro.Test macro of the present invention separates emitting antenna and test antenna, can avoid the interference of transmitting terminal signal source to test signal, has increased measuring distance simultaneously.
Non-contact passive sensor signal test macro of the present invention; Comprise signal source, test circuit and passive sensor; It is characterized in that; Have independently emitting antenna and test antenna, said signal source transmits to said passive sensor through emitting antenna, and said test circuit receives the detection signal of said passive sensor through test antenna.
Preferably; Said emitting antenna and test antenna and passive sensor antenna are the planar spiral inductor coil; And said test macro is regulated position and angle between said emitting antenna, test antenna and the passive sensor antenna through the aerial position regulating device; So that reduce the interference of emitting antenna and test antenna, improve the transmission between emitting antenna, test antenna and the passive sensor antenna, reach best test effect.
Further preferably, said aerial position regulating device comprises base and sliding tray, and respectively with corresponding aerial position movable block of said emitting antenna, test antenna and passive sensor antenna and aerial angle swinging strut.
Preferably, said passive sensor is a pressure transducer.Further preferably; Said passive sensor has the LC resonant circuit; Keep the work of LC resonant circuit and convert pressure into resonance frequency through the energy of said transmission antennas transmit, and the detection signal of resonance frequency is sent to test antenna through sensor antenna.Said test circuit converts the detection signal of resonance frequency into pressure signal.Further preferably, said test circuit is: electric impedance analyzer is used for measuring the resonance frequency of passive sensor and releasing the pressure signal value according to impedance; Perhaps, the oscillograph or the signal deteching circuit of test test antenna end signal, the frequency of analyzing and testing signal obtains the pressure signal value.
Preferably, said signal source is a swept signal source, through the swept-frequency signal in the said transmission antennas transmit certain frequency scope.Further preferably, said swept-frequency signal is produced the frequency signal that is perhaps changed by single chip machine controlling circuit output by signal generator.Further preferably, the frequency range of said swept-frequency signal is according to the resonance frequency and the frequency range decision of passive sensor.
The invention solves the existing passive pressure transducer and under environment such as high temperature, humidity, can't accurately test the problem of sensor signal at a distance; Emitting antenna and test antenna are separated; Can avoid the signal of emitting antenna end that the test lead signal is produced interference, can in the certain distance scope, detect sensor signal simultaneously.
Description of drawings
Fig. 1 is the non-contact passive sensor signal test principle structural representation of the preferred embodiment of the present invention;
Fig. 2 is the testing process synoptic diagram of the preferred embodiment of the present invention;
Fig. 3 is the non-contact passive sensor signal test macro physical construction synoptic diagram of the preferred embodiment of the present invention.
Embodiment
By specifying technology contents of the present invention, structural attitude, realized purpose and effect, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.
The theory structure of system according to the invention is as shown in Figure 1, comprises signal source 10, test circuit 20 and passive sensor 30.As giving an example, passive sensor 30 adopts the LC resonance type pressure sensor in the present embodiment, and this sensor absorbs its electromagnetic radiation energy through the signal of sensor antenna 301 reception signal sources 10, and sensor is started working.An energy part that absorbs is used for LC resonant circuit self work of sensor, a part be used for sensor sensing to detection signal send with the form of resonance frequency.When receiving ambient pressure, the LC resonance type pressure sensor does the time spent; The electric capacity cavity pressurized generation deformation of sensor; Cause the change of capacitance; Thereby the resonance frequency that causes sensor changes, and therefore the resonance frequency that detection signal had according to this sensor emission just can calculate its pressure that receives size.Because sensor is passive; For all being suitable at environment such as high temperature, humidities; Because sensor can be launched wireless signal; Between itself and signal source 10 and the test circuit 20 certain distance can be arranged, so signal source 10 just need not be positioned under high temperature, the wet environment with test circuit 20 and antenna thereof, can avoid of the interference of these environment to instrument and test circuit generation.
Test circuit 20 converts the detection signal of passive sensor 30 resonance frequencies into pressure signal according to the transition function between the pressure resonant frequency.Said test circuit 20 can adopt electric impedance analyzer, and when the resonant circuit of sensor reached resonance, it is minimum that impedance reaches, and can measure the resonance frequency of corresponding point, thereby releases the value of institute's measuring pressure signal.Said test circuit 20 also can directly be tested the signal of test antenna 201 ends with oscillograph; Also can the signal on the test antenna of being gathered 201 be handled with signal deteching circuit; Analyzing and processing draws frequency signal, thereby draws the correlated signal values that will survey.
Fig. 2 has described the testing process of the embodiment of the invention, comprising: step S1, and signal source 10 gives emitting antenna 101 emission swept-frequency signals; Step S2, sensor antenna 301 is used for working sensor through the electromagnetic radiation received energy and transmits to test antenna 201; Step S3 changes when sensor sensing arrives, and the resonance frequency of the LC resonant circuit of itself changes, and issues test antenna 201 to detection signal through sensor antenna 301; Step S4, said test antenna 201 is received signal through test circuit 20 tests, and handles.
The method that disturb detection signal in erasure signal of the present invention source is that signal source 10 adopts antenna independent of each other respectively with test circuit 20, i.e. emitting antenna 101 and test antenna 201.And making between sensor antenna 301, emitting antenna 101 and the test antenna 201 has certain distance, has a certain degree between the antenna, thereby helps the signal transmission between the antenna.As shown in Figure 3, said sensor antenna 301, emitting antenna 101 and test antenna 201 adopt the planar spiral inductor coils.Said non-contact passive sensor signal test macro also has aerial position regulating device 40, is used to regulate position and angle between said emitting antenna 101, test antenna 201 and passive sensor 301 antennas.Said aerial position regulating device 40 comprises on base 401, the base 401 sliding tray 402 is set.Emitting antenna 101 is connected with swept signal source 10, and places on the aerial angle swinging strut 403A; Aerial angle swinging strut 403A is fixed on the aerial position movable block 404A, and aerial position movable block 404A can slide along sliding tray 402.Similar ground, have with test circuit 20 and test antenna 201 corresponding aerial angle swinging strut 403B and aerial position movable block 404B on; And with passive sensor 30 and passive sensor antenna corresponding aerial angle swinging strut 403C and aerial position movable block 404C.Along sliding tray 402 portable antenna position movable block 404A-C, can change the horizontal range between the antenna, simultaneously through aerial angle swinging strut 403A-C, change the angle position between the antenna, to reach best test effect.The filling block 405 at sliding tray 402 centers can take out, and is convenient to install and fix the sliding shoe of antenna;
In the practice, we place the environment that needs gaging pressure to passive sensor 30, place the test board of signal source 10 and test circuit 20 near the test environment.The invention solves the existing passive pressure transducer and under environment such as high temperature, humidity, can't accurately test the problem of sensor signal at a distance; Emitting antenna and test antenna are separated; Can avoid the signal of emitting antenna end that the test lead signal is produced interference, can in the certain distance scope, detect sensor signal simultaneously.
The above is merely embodiments of the invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes instructions of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, for example to municipal water facilities, gas facility, means of transportation patrol and examine equipment and system etc., all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. non-contact passive sensor signal test macro; Comprise signal source, test circuit and passive sensor; It is characterized in that; Have independently emitting antenna and test antenna, said signal source transmits to said passive sensor through emitting antenna, and said test circuit receives the detection signal of said passive sensor through test antenna.
2. test macro according to claim 1; It is characterized in that; Said emitting antenna and test antenna and passive sensor antenna are the planar spiral inductor coil, and said test macro is regulated position and angle between said emitting antenna, test antenna and the passive sensor antenna through the aerial position regulating device.
3. test macro according to claim 2; It is characterized in that; Said aerial position regulating device comprises base and sliding tray, and respectively with corresponding aerial position movable block of said emitting antenna, test antenna and passive sensor antenna and aerial angle swinging strut.
4. test macro according to claim 1 is characterized in that, said passive sensor is a pressure transducer.
5. test macro according to claim 4; It is characterized in that; Said passive sensor has the LC resonant circuit; Keep the work of LC resonant circuit and convert pressure into resonance frequency through the energy of said transmission antennas transmit, and the detection signal of resonance frequency is sent to test antenna through sensor antenna.
6. test macro according to claim 5 is characterized in that said test circuit converts the detection signal of resonance frequency into pressure signal.
7. test macro according to claim 6 is characterized in that, said test circuit is: electric impedance analyzer is used for measuring the resonance frequency of passive sensor and releasing the pressure signal value according to impedance; Perhaps, the oscillograph or the signal deteching circuit of test test antenna end signal, the frequency of analyzing and testing signal obtains the pressure signal value.
8. test macro according to claim 1 is characterized in that said signal source is a swept signal source, through the swept-frequency signal in the said transmission antennas transmit certain frequency scope.
9. test macro according to claim 8 is characterized in that, said swept-frequency signal is produced the frequency signal that is perhaps changed by single chip machine controlling circuit output by signal generator.
10. cruising inspection system according to claim 8 is characterized in that, the frequency range of said swept-frequency signal is according to the resonance frequency and the frequency range decision of passive sensor.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103278181A (en) * | 2013-05-03 | 2013-09-04 | 东南大学 | Wireless reading circuit for passive LC resonator sensor |
| CN103292836A (en) * | 2013-05-15 | 2013-09-11 | 中北大学 | Measuring system and method of LC (inductive capacitive) sensor in sweep frequency mode |
| CN103438911A (en) * | 2013-07-25 | 2013-12-11 | 中北大学 | LC resonance sensor reading system and method under fixed frequency mode |
| CN105391503A (en) * | 2015-10-21 | 2016-03-09 | 深圳市三极天线技术有限公司 | Detection method suitable for near-field communication |
| CN105702011A (en) * | 2016-01-19 | 2016-06-22 | 东南大学 | Passive wireless multiparameter sensing system switched by MEMS switch |
| CN106683387A (en) * | 2016-12-10 | 2017-05-17 | 杭州鸿雁智能科技有限公司 | Passive sensing device and passive type wireless sensing system |
| CN112729624A (en) * | 2020-12-04 | 2021-04-30 | 厦门大学 | Array LC pressure sensor integrated device |
| CN113108824A (en) * | 2021-04-13 | 2021-07-13 | 内蒙古显鸿科技股份有限公司 | Test system and test method |
| CN114124203A (en) * | 2021-10-09 | 2022-03-01 | 浙江大学 | Back scattering electric signal detection and transmission system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278181A (en) * | 2013-05-03 | 2013-09-04 | 东南大学 | Wireless reading circuit for passive LC resonator sensor |
| CN103278181B (en) * | 2013-05-03 | 2016-03-16 | 东南大学 | A kind of wireless sensing circuit of passive LC resonator sensor |
| CN103292836A (en) * | 2013-05-15 | 2013-09-11 | 中北大学 | Measuring system and method of LC (inductive capacitive) sensor in sweep frequency mode |
| CN103438911A (en) * | 2013-07-25 | 2013-12-11 | 中北大学 | LC resonance sensor reading system and method under fixed frequency mode |
| CN105391503A (en) * | 2015-10-21 | 2016-03-09 | 深圳市三极天线技术有限公司 | Detection method suitable for near-field communication |
| CN105702011A (en) * | 2016-01-19 | 2016-06-22 | 东南大学 | Passive wireless multiparameter sensing system switched by MEMS switch |
| CN106683387A (en) * | 2016-12-10 | 2017-05-17 | 杭州鸿雁智能科技有限公司 | Passive sensing device and passive type wireless sensing system |
| CN112729624A (en) * | 2020-12-04 | 2021-04-30 | 厦门大学 | Array LC pressure sensor integrated device |
| CN112729624B (en) * | 2020-12-04 | 2021-10-15 | 厦门大学 | Array LC pressure sensor integrated device |
| CN113108824A (en) * | 2021-04-13 | 2021-07-13 | 内蒙古显鸿科技股份有限公司 | Test system and test method |
| CN114124203A (en) * | 2021-10-09 | 2022-03-01 | 浙江大学 | Back scattering electric signal detection and transmission system |
| CN114124203B (en) * | 2021-10-09 | 2023-11-14 | 浙江大学 | Back scattering electric signal detection transmission system |
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