CN103245396B - The thing liquid level sensor of tool analog functuion - Google Patents
The thing liquid level sensor of tool analog functuion Download PDFInfo
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- CN103245396B CN103245396B CN201310142601.1A CN201310142601A CN103245396B CN 103245396 B CN103245396 B CN 103245396B CN 201310142601 A CN201310142601 A CN 201310142601A CN 103245396 B CN103245396 B CN 103245396B
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Abstract
The invention discloses a kind of thing liquid level sensor of tool analog functuion, comprise light emission module, Optical Receivers, signal processing module, analog module and output module, wherein said light emission module: send light signal to material to be measured; Optical Receivers: receive described light signal, is converted into electric signal by described light signal and is exported by described electric signal; According to described electric signal, signal processing module: receive described electric signal, judges that this material is as high-order or low level; Analog module: be connected with described signal processing module, switches to normal output signal or analog output signal by described electric signal; Output module: be electrically connected with described switch, exports described normal output signal or analog output signal.The present invention can transfer low level signals to high charge level signal by analog module or high charge level signal transfers low level signals to, whether normally tests this thing liquid level sensor; The present invention simultaneously has delay function, accurately can measure the liquid level of different liquids.
Description
Technical field
The present invention relates to a kind of thing liquid level sensor, particularly a kind of thing liquid level sensor with analog functuion.
Background technology
Thing liquid level sensor plays the part of important role in warehousing management, all various industries relating to storage all can use, as petrochemical industry, large-scale grocery trade, feed industry, steel industry, cement sectors etc., it is mainly by the storage in the probe detecting storage of sensor, so as to the reserves in monitoring storage.
Wherein there is the sensor of an optical profile type, please refer to Fig. 8, it includes light emission module 80, Optical Receivers 81, signal processing module 82 and an output module 83, has a photo-sensitive cell so that light signal is converted to electric signal in this Optical Receivers 81.Be mainly emitted beam by this light emission module 80 during use, after the material reflection in storage, and obtain this reflection ray to be converted to corresponding electric signal via Optical Receivers 81, recycling signal processing module 82 is analyzed, finally can be exported the result of this signal processing module analysis by this output module 83, learn the material reserves in this storage for user.
Whether only this sensor is when manufacture completes, and whether normally most likely first test it, this sensor is first placed in one and has in the storage of material or liquid material by test mode polyphyly, with the height of material in actual measurement storage, normal so as to confirming this thing liquid level sensor.
In the method for above-mentioned testing sensor, if the thing liquid level of storage is when being high charge level, whether as normal when low material level for testing sensor, after its polyphyly waits for that the reserves in this storage are down to low material level, just test, vice versa, only above-mentioned test mode is real is inefficiency, reason high charge level is down to low material level or is risen to high charge level by low material level and must expend too much time wait, therefore have a simulation system can simulate the height of this thing liquid level, test duration can be shortened, as namely the U.S.'s No. 4354180 Patent Case disclosed the height that a simulation system can simulate liquid level, whether exception is had so as to test fluid level sensor, refer to shown in Fig. 9, this simulation system has an optical transmitting set 90, one optical receiver 91, one probe 92, one light source switch 93 and a high computational module 94, this probe 92 is that a transparent material formed, and a reflective groove 921 is formed in upper end, the another reflecting surface 922 be formed in lower end without exception in triangle taper, this high computational module 94 has an amplifier 941 again, one switch 942 and a liquid level detector 943, if it is when to be mainly probe 92 be arranged in air (liquid level is lower), after this light source switch 93 opens energising, this optical transmitting set 90 is made to send a light L, this light L enters probe 92 immediately and reflexes to this optical receiver 91 by reflecting surface 922, another this light L also can enter this reflective groove 921, and by reflective groove 921 bottom reflection and enter this optical receiver 91, wherein because of pop one's head in 92 optical index be greater than the optical index of this air, and light L is the critical angle being greater than this anaclasis corresponding to this reflecting surface 922, meaning is when even this probe 92 is arranged in air, namely this light L can be totally reflected in this reflecting surface 922, therefore light L can reflex to this optical receiver 91, otherwise, if when probe 92 is placed in liquid, because of pop one's head in 92 optical index be equivalent to the optical index of this liquid, therefore therefore this light L can pass this reflecting surface 922, make optical receiver 91 cannot obtain light L, light L can expose to this reflective groove 921 because of scattering again, and this optical receiver 91 can be made to receive this light L by reflective groove 921, wherein in optical receiver 91, there is a photo-sensitive cell, it is to produce a corresponding threshold voltage according to the brightness of light, if when therefore probe 91 is arranged in air, this optical receiver 91 is obtain light L respectively from this reflecting surface 922 and reflective groove 921, then therefore optical receiver 91 induces higher threshold voltage (5V), if when probe 91 is arranged in liquid, this optical receiver 91 only obtains light L in reflective groove 921, therefore optical receiver 91 induces lower threshold voltage (2V), in the liquid level detector 943 recycling this high computational module 94 by this, a standard voltage value differentiates that liquid is low material level or high charge level, as threshold voltage is greater than standard voltage value, namely showing liquid is low material level, vice versa, be resent to monitoring client to learn for user.
Wherein above-mentioned high computational module 94 is be available for users to be switched to a test pattern, meaning is namely as probe 92 is positioned at liquid, now former level sensing should be high charge level, the standard voltage value of this liquid level detector 943 can be made to be down to 1 volt by this switch 942, so the threshold voltage (2V) that standard voltage value is positioned at high charge level than liquid is low, can simulative display be low material level, otherwise, if probe 92 is arranged in air, express liquid height is low material level, now another this light source switch 93 to be closed, because optical receiver 91 cannot receive light, then namely this threshold voltage is expressed as 0 volt, therefore standard voltage value can be greater than threshold voltage (0V), the situation of sensor when this liquid height is high charge level can be simulated.
When only standard voltage value being down in above-mentioned simulation system 1 volt, this threshold voltage easily because of in liquid doped with drift to some extent during impurity, be directed at and cannot be positioned at the state of low material level by model fluid, and then take for this sensor abnormality, to be positioned at the test mode of high charge level comparatively numerous and diverse for its liquid again, causes user to operate inconvenience, in view of the above problems, be necessary in fact to solve, and seek feasible solution.
Summary of the invention
In order to overcome the defect of prior art, the invention provides a kind of thing liquid level sensor of tool analog functuion, it is characterized in that, comprising light emission module, Optical Receivers, signal processing module, analog module and output module,
Wherein said light emission module: send light signal to material to be measured;
Optical Receivers: receive described light signal, is converted into electric signal by described light signal and is exported by described electric signal;
According to described electric signal, signal processing module: receive described electric signal, judges that this material is as high-order or low level;
Analog module: be connected with described signal processing module, switches to normal output signal or analog output signal by described electric signal;
Output module: be electrically connected with described analog module, exports described normal output signal or analog output signal.
Preferably, described light emission module comprises a smooth modulation unit, and described smooth modulation unit is for adjusting the intensity, phase place and the luminous field pattern that comprise described light signal.
Preferably, described light emission module is wideband spectrum light source or narrow frequency spectrum light source.
Preferably, described smooth modulation unit is the one in pin hole, Photo Interrupter, frequency multiplier, grating and amplifier.
Preferably, described Optical Receivers comprises photo-sensitive cell, and described photo-sensitive cell is the one in photoresistance, optical diode, photoelectric crystal, CCD and CMOS.
Preferably, described analog module comprises a switch and phase inverter.
Preferably, described switch is an one pole double-break switch, and it has contact, one first contact and one second contact altogether;
Described first contact is electrically connected with the output terminal of signal processing module, and described second contact is electrically connected with inverter output.
Preferably, described analog module also comprises a driver, and described driver switches for the connection controlling described switch.
Preferably, the input end of described output module is connected with described contact altogether.
Preferably, described output module comprises a delayer.
Compared with prior art, beneficial effect of the present invention is as follows:
The present invention can transfer low level signals to high charge level signal by analog module or high charge level signal transfers low level signals to, whether normally tests this thing liquid level sensor; The present invention simultaneously has delay function, accurately can measure the liquid level of different liquids.
Certainly, implement arbitrary product of the present invention might not need to reach above-described all advantages simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is analog module structural representation provided by the invention;
Fig. 3: be the low material level view of an embodiment provided by the invention;
Fig. 4: be an embodiment simulation high charge level view provided by the invention;
Fig. 5: be an embodiment high charge level view provided by the invention;
Fig. 6: for an embodiment provided by the invention simulates low material level view;
Fig. 7: be an embodiment schematic diagram provided by the invention;
Fig. 8: be the structural representation of prior art;
Fig. 9: be the simulation liquid level high-level schematic of prior art.
Embodiment
Below with the drawings and specific embodiments, the present invention will be further described.
The invention provides a kind of thing liquid level sensor of tool analog functuion, comprise light emission module, Optical Receivers, signal processing module, analog module and output module,
Wherein said light emission module: send light signal to material to be measured;
Optical Receivers: receive described light signal, is converted into electric signal by described light signal and is exported by described electric signal;
According to described electric signal, signal processing module: receive described electric signal, judges that this material is as high-order or low level;
Analog module: be connected with described signal processing module, switches to normal output signal or analog output signal by described electric signal;
Output module: be electrically connected with described analog module, exports described normal output signal or analog output signal.
Wherein, analog module comprises a phase inverter and switch, when electric signal switches to normal output signal, is using forestland, when electric signal switches to analog output signal, is simulation model.Detailed process is as follows:
During for using forestland, now the input end system of switch is electrically connected with the output terminal of signal processing module, therefore after this light emission module emits beam, through material reflection and received by this Optical Receivers, after electric signal corresponding to light signal transferring to by the photo-sensitive cell of Optical Receivers, be resent to signal processing module, according to its electric signal received, this signal processing module differentiates that height of materials is after high charge level, then be sent to output module to export, monitored for user, when and for example Optical Receivers cannot obtain the light through material reflection, then signal processing module is determined as low material level according to corresponding electric signal,
If when having again tester liquid level sensor demand, analog module is switched to simulation model, now namely switch input end is electrically connected with the output terminal of this reverser, therefore signal processing module is then according to after this electric signal and the high charge level that differentiates height of materials respectively or low material level, output module is exported to again via after this reverser, wherein, if when signal processing module is determined as high charge level via electric signal, because analog module is simulation model, therefore the output signal of signal processing module can be resent to output module via this reverser, now user can be modeled as low material level when actual material is high charge level, otherwise, if when height of materials is low material level, high charge level can be modeled as through this reverser, by this can in this simulation model, thing liquid level sensor is facilitated to simulate the height in storing in a warehouse, whether normal when high charge level or low material level so as to testing this thing liquid level sensor, thus, can for promptly switching to simulation model by this analog module, and this analog module has this reverser, therefore correctly low material level can be converted to high charge level or high charge level is converted to low material level, therefore can be used in the liquid of liquid or part muddiness, and test will be caused abnormal because of signal skew, whether normally this thing liquid level sensor is tested fast for user.
Embodiment
Refer to Fig. 1, this thing liquid level sensor system includes light emission module 10, Optical Receivers 20, signal processing module 30, analog module 40 and an output module 50, wherein:
This light emission module 10 can emit beam to material to be measured or liquid, in the present embodiment, this light emission module 10 Jin mono-Walk is provided with a smooth modulation unit 11, for the intensity that adjustment light emission module 10 emits beam, phase place, luminous field pattern etc., different materials or liquid is used in so as to supplying, this light emission module 10 can be the wideband spectrum light source such as LED or neon (Ne) lamp again, also can be the narrow frequency spectrum light sources such as laser diode (LaserDiode), this light modulation unit 11 another can be pin hole (PinHole), Photo Interrupter, frequency multiplier (Etalon), grating (Grating) or image intensifer (Amplifier) etc.
This Optical Receivers 20 has an output terminal, and in Optical Receivers 20, have a photo-sensitive cell 21, a light signal so as to being obtained by Optical Receivers 20 is converted to an electric signal, and exported by output terminal, this photo-sensitive cell 21 can be photoresistance, optical diode, photoelectric crystal, CCD or CMOS etc.
This signal processing module 30 has an input end and an output terminal, this input end system is electrically connected with aforementioned Optical Receivers 20 output terminal, to obtain this electric signal, then be exported by output terminal after a high charge level signal or a low level signals by signal processing module 30 analysis.
This analog module 40 is the handoff functionality providing a using forestland and a simulation model, it has reverser 41 and a switch 42 (as shown in Figure 2), this reverser 41 input end system is electrically connected with this signal processing module 30 output terminal, switch 42 is an one pole double-break switch (SPDT again, Singlepole, doublethrow), therefore it has contact altogether, one first contact and one second contact, this the first contact system is electrically connected with signal processing module 30 output terminal, this the second contact system is electrically connected with inverter output, in the present embodiment, using forestland is entered when common contact is connected system with the first contact, and altogether contact is connected system and enters simulation model with the second contact, a driver 43 is provided with further again in this analog module 40, to control the switching of switch 42, that is user can pass through driver 43 and controls this switch 42, to switch using forestland or simulation model.
This output module 50 has an input end and an output terminal, and in the present embodiment, the input end system of this output module 50 is electrically connected with the common contact of aforementioned switch 42.
The thing liquid level sensor formed according to above-mentioned structure, when normality uses, this driver 43 is that the common contact ordering about this switch 42 is connected with the first contact, so as to entering using forestland, therefore after light emission module 10 sends a light to material, and receive by Optical Receivers 20, electric signal is converted to through photo-sensitive cell 21, via signal processing module 30 analysis, this electric signal can learn that the height of this material is high charge level, again with output module output display, otherwise, if when Optical Receivers 20 cannot obtain light, then namely this signal processing module 30 can differentiate to be highly low material level according to the electric signal of this correspondence, so namely be available for users to the storage so as to monitoring material, wherein, shown in Fig. 3, as during for simulation test thing liquid level sensor, height of materials is made to be low material level L, and order about switch 42 by driver 43 and be connected with the second contact to make this common contact, therefore this signal processing module 30 output terminal transfers this low level signals to high charge level signal via this reverser 41, therefore this output module 50 therefore output display be high charge level H (as shown in Figure 4), otherwise, if when height of materials was high charge level H originally (as shown in Figure 5), can be transferred to low level signals by this reverser 41, be low material level L (as shown in Figure 6) so as to making output module 50 output display, thus, be available for users to switch using forestland or simulation model voluntarily depending on demand by this analog module 40, and utilize this reverser 41 easily high charge level signal to be reversed to low level signals or to be reversed to high charge level signal by low level signals, person easy to use simulates the height of material by this, normal so as to testing this thing liquid level sensor, and this structure system can be widely used in material or liquid.
About the another embodiment of the present invention, please refer to Fig. 7, its basic framework is roughly the same with previous embodiment, its difference ties up to this output module 50 and is provided with a time delay device 60 in output terminal further, if its be mainly because of when liquid be High-Sr granite (ViscousFluid) or high viscoelastic fluid (HighElastomericFluid) time, this liquid level can residue on thing liquid level sensor when reducing, and then thing liquid level sensor is judged by accident, therefore namely this time delay device 60 is simulate this testing liquid to be High-Sr granite or high viscoelastic fluid and the situation residued on thing liquid level sensor, so as to being able to this thing liquid level sensor of omnibearing simulation test for user, exception is there is during to avoid being used in different testing liquid.
The disclosed preferred embodiment of the present invention just sets forth the present invention for helping above.Preferred embodiment does not have all details of detailed descriptionthe, does not limit the embodiment that this invention is only described yet.Obviously, according to the content of this instructions, can make many modifications and variations.This instructions is chosen and is specifically described these embodiments, is to explain principle of the present invention and practical application better, thus makes art technician understand well and to utilize the present invention.The present invention is only subject to the restriction of claims and four corner and equivalent.
Claims (8)
1. a thing liquid level sensor for tool analog functuion, is characterized in that, comprises light emission module, Optical Receivers, signal processing module, analog module and output module,
Wherein said light emission module: send light signal to material to be measured;
Optical Receivers: receive described light signal, is converted into electric signal by described light signal and is exported by described electric signal;
According to described electric signal, signal processing module: receive described electric signal, judges that this material is as high-order or low level;
Analog module: be connected with described signal processing module, switches to normal output signal or analog output signal by described electric signal;
Output module: be electrically connected with described analog module, exports described normal output signal or analog output signal;
Described analog module comprises a switch and phase inverter;
Described output module comprises a delayer.
2. the thing liquid level sensor of tool analog functuion as claimed in claim 1, it is characterized in that, described light emission module comprises a smooth modulation unit, and described smooth modulation unit is for adjusting the intensity, phase place and the luminous field pattern that comprise described light signal.
3. the thing liquid level sensor of tool analog functuion as claimed in claim 2, it is characterized in that, described light emission module is wideband spectrum light source or narrow frequency spectrum light source.
4. tool analog functuion thing liquid level sensor as claimed in claim 2, it is characterized in that, described smooth modulation unit is the one in pin hole, Photo Interrupter, frequency multiplier, grating and amplifier.
5. tool analog functuion thing liquid level sensor as claimed in claim 1, it is characterized in that, described Optical Receivers comprises photo-sensitive cell, and described photo-sensitive cell is the one in photoresistance, optical diode, photoelectric crystal, CCD and CMOS.
6. tool analog functuion thing liquid level sensor as claimed in claim 1, it is characterized in that, described switch is an one pole double-break switch, and it has contact, one first contact and one second contact altogether;
Described first contact is electrically connected with the output terminal of signal processing module, and described second contact is electrically connected with inverter output.
7. tool analog functuion thing liquid level sensor as claimed in claim 6, it is characterized in that, described analog module also comprises a driver, and described driver switches for the connection controlling described switch.
8. tool analog functuion thing liquid level sensor as claimed in claim 6, is characterized in that, the input end of described output module is connected with described contact altogether.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310142601.1A CN103245396B (en) | 2013-04-23 | 2013-04-23 | The thing liquid level sensor of tool analog functuion |
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| CN201310142601.1A CN103245396B (en) | 2013-04-23 | 2013-04-23 | The thing liquid level sensor of tool analog functuion |
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| CN103245396B true CN103245396B (en) | 2016-01-13 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4354180A (en) * | 1980-12-19 | 1982-10-12 | Genelco, Inc. | Electro-optical liquid level sensor |
| CN201229501Y (en) * | 2008-07-22 | 2009-04-29 | 王晓红 | Photoelectric material level controller |
| JP2010513142A (en) * | 2006-11-30 | 2010-04-30 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Assembly having a portable device with a fluid-fillable container and holder |
| CN201532693U (en) * | 2009-11-12 | 2010-07-21 | 昆明理工大学 | Infrared electronic alarm |
| TWM442501U (en) * | 2012-06-01 | 2012-12-01 | Finetek Co Ltd | Liquid level sensor |
-
2013
- 2013-04-23 CN CN201310142601.1A patent/CN103245396B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4354180A (en) * | 1980-12-19 | 1982-10-12 | Genelco, Inc. | Electro-optical liquid level sensor |
| JP2010513142A (en) * | 2006-11-30 | 2010-04-30 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Assembly having a portable device with a fluid-fillable container and holder |
| CN201229501Y (en) * | 2008-07-22 | 2009-04-29 | 王晓红 | Photoelectric material level controller |
| CN201532693U (en) * | 2009-11-12 | 2010-07-21 | 昆明理工大学 | Infrared electronic alarm |
| TWM442501U (en) * | 2012-06-01 | 2012-12-01 | Finetek Co Ltd | Liquid level sensor |
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