CN202216778U - Acoustic urface wave temperature sensor based on multiple couplers - Google Patents
Acoustic urface wave temperature sensor based on multiple couplers Download PDFInfo
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- CN202216778U CN202216778U CN2011202651757U CN201120265175U CN202216778U CN 202216778 U CN202216778 U CN 202216778U CN 2011202651757 U CN2011202651757 U CN 2011202651757U CN 201120265175 U CN201120265175 U CN 201120265175U CN 202216778 U CN202216778 U CN 202216778U
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- acoustic wave
- surface acoustic
- input end
- resistance
- interdigital transducer
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Abstract
The utility model relates to an acoustic surface wave temperature sensor based on multiple couplers, which comprises an acoustic surface wave input end, an electronic-to-optical transducer, optical fiber couplers, photoelectric converters and acoustic surface wave output ends, wherein the two photoelectric converters and the two acoustic surface wave output ends are arranged; the acoustic surface wave input end, the electronic-to-optical transducer and the optical fiber couplers are sequentially connected; the optical fiber couplers are respectively connected with the two photoelectric converters; the two photoelectric converters are respectively connected with the corresponding acoustic surface wave output ends; and one of the two acoustic surface wave output ends is provided with a temperature sensitive membrane. Compared with the prior art, the acoustic surface wave temperature sensor has the advantages of being high in accuracy and sensitivity, convenient for large batch production, small in size, light in weight, low in power consumption, good in structure technology and the like.
Description
Technical field
The utility model relates to a kind of temperature sensor, especially relates to a kind of surface acoustic wave temperature sensor based on multiple coupled device.
Background technology
The development trend of current sensor technology mainly is:
1, from contact to contactless development, develop to active formula (band signal treatment circuit) direction from passive type.
2, realize multifunction, integrated and intelligent.Multifunction is meant that a sensor can detect a plurality of parameters, and integrated is to utilize the MEMS technology that sensitive element, processor are integrated on the chip; Intellectuality is that sensor combines with ECU, has self-detection, memory and rated capacity.
3, in order to realize the information sharing of sensor, new digital formula sensor must have Embedded microprocessor, and what have requires digital output, is fit to bus requests such as CAN Bus, LINBus.
And the SAW sensor is the pottery that continues; Up-and-coming youngster always after the semiconductor, sensors such as optical fiber.The sensor that general pottery or semiconductor material are processed adopts resistance-type or condenser type mostly.With mini signal output, need through mould/number conversion ability and computer interface; And the sensor that the SAW technology is processed, during work, signal output do not need through A/D (mould/number) conversion just can with computer interface, thereby precision height.Surface acoustic wave temperature sensor based on multiple coupled device can repeatedly be coupled through fiber coupler, can obtain the different temperature value simultaneously, measures simultaneously.
The utility model content
The purpose of the utility model be exactly in order to overcome the defective that above-mentioned prior art exists a kind of high precision, high sensitivity are provided, are convenient to produce in enormous quantities, volume is little, in light weight, low in energy consumption, the surface acoustic wave temperature sensor based on multiple coupled device that processability of product structure is good.
The purpose of the utility model can realize through following technical scheme:
A kind of surface acoustic wave temperature sensor based on multiple coupled device; It is characterized in that; Comprise surface acoustic wave input end, electrical to optical converter, fiber coupler, photoelectric commutator, surface acoustic wave output terminal; Described photoelectric commutator, surface acoustic wave output terminal are equipped with two; Described surface acoustic wave input end, electrical to optical converter, fiber coupler connect successively, and described fiber coupler is connected with two photoelectric commutators respectively, and described two photoelectric commutators connect with corresponding surface acoustic wave output terminal respectively; One of them of two surface acoustic wave output terminals is provided with the responsive to temperature film.
Described surface acoustic wave input end comprises first input end power supply, the first input interdigital transducer, first input end lead, first output interdigital transducer and first output terminal; Described first input end power supply is connected with the first input interdigital transducer through the first input end lead, and described first output interdigital transducer is connected with first output terminal.
The described first input interdigital transducer upper end is connected with the positive pole of first input end power supply, and the described first input interdigital transducer lower end is connected with the negative pole of first input end power supply.
Described electrical to optical converter comprises resistance R 211, resistance R 212, resistance R 213, capacitor C 22, slide rheostat R23, photodiode D24 and transistor Q25;
Described transistor Q25 comprises base stage, collector and emitter; Described base stage is connected with capacitor C 22 1 ends, resistance R 213 1 ends, slide rheostat R23 one end respectively; Described collector is connected with the negative pole of photodiode D24, and described emitter is through resistance R 212 ground connection;
Described capacitor C 22 other ends are through resistance R 211 ground connection, and described resistance R 213 other ends are connected with the positive pole of photodiode D24, described slide rheostat R23 other end ground connection.
Described fiber coupler comprises optical fiber and polygon prism.
Described photoelectric commutator comprises capacitor C 411, capacitor C 412, resistance R 42, amplifier and photodiode D44; Described photodiode D44 plus earth; The electrode input end of described photodiode D44 negative pole and amplifier; The negative input ground connection of described amplifier, described capacitor C 412, resistance R 42 all are connected in parallel on amplifier anode input end and the amplifier out, and described amplifier out is connected with capacitor C 411.
Described surface acoustic wave output terminal comprises the second input end power supply, the second input interdigital transducer and second output interdigital transducer, and the described second input end power supply is connected with the second input interdigital transducer.
Compared with prior art, the utlity model has following advantage:
1) high precision, high sensitivity: the utility model sensor is the up-and-coming youngster always after sensors such as pottery, semiconductor, optical fiber, and the sensor that general pottery or semiconductor material are processed adopts resistance-type or condenser type mostly.With mini signal output, need through mould/number conversion ability and computer interface; And the sensor that the utility model technology is processed, during work, signal output do not need through A/D (mould/number) conversion just can with computer interface, thereby precision height.
2) be convenient to produce in enormous quantities: the critical component that the utility model sensor is red---SAW resonator or lag line, adopt the semiconductor planar manufacture craft, very easily integrated; Integrated, various functional circuits are prone to combination and simplify sound construction; Steady quality, repeatability and good reliability.Being easy to produce in enormous quantities, is the electronic technology development, for mounted on surface and package technique all provide condition easily.
3) volume is little, in light weight, low in energy consumption: can know that from theoretical analysis the concentration of energy of the utility model product more than 90% is in the degree of depth apart from about the wavelength in surface, thereby loss is low; Add that the SAW sensor circuit is simple, so the power consumption of whole sensor is very little.
4) processability of product structure is good: the utility model sensor is a planar structure, flexible design; The sheet profile is easy to combination; Can realize monolithic multifunctionization, intellectuality more easily; Install easily, and can obtain good thermal behavior and mechanical property.
5) can repeatedly be coupled, can obtain the different temperature value simultaneously, measure simultaneously.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation of the utility model surface acoustic wave input end;
Fig. 3 is the electrical block diagram of utility model electrical to optical converter;
Fig. 4 is the structural representation of utility model fiber coupler;
Fig. 5 is the electrical block diagram of the utility model photoelectric commutator;
Fig. 6 is the structural representation of the utility model surface acoustic wave output terminal.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment
As shown in Figure 1; A kind of surface acoustic wave temperature sensor based on multiple coupled device; Comprise surface acoustic wave input end 1, electrical to optical converter 2, fiber coupler 3, photoelectric commutator 4, surface acoustic wave output terminal 5; Described photoelectric commutator 4, surface acoustic wave output terminal 5 are equipped with two, and connect one to one; One of them of two surface acoustic wave output terminals 5 is provided with responsive to temperature film 6.Electric signal obtains different output waveforms after containing responsive to temperature film and the output terminal that does not contain the responsive to temperature film, through waveform is carried out weighting, thereby finally judge the size and the temperature difference of temperature.
As shown in Figure 2; Described surface acoustic wave input end 1 comprises first input end power supply 11, the first input interdigital transducer, first input end lead 14, first output interdigital transducer 15, first output terminal 16; Described first input end power supply 11 is connected with the first input interdigital transducer through first input end lead 14, and described first output interdigital transducer 15 is connected with first output terminal 16.
The described first input interdigital transducer upper end 12 is connected with the positive pole of first input end power supply 11, and described first imports interdigital transducer lower end 13 is connected with the negative pole of first input end power supply 11.
As shown in Figure 3, described electrical to optical converter 2 comprises resistance R 211, resistance R 212, resistance R 213, capacitor C 22, slide rheostat R23, photodiode D24, transistor Q25; Described transistor Q25 comprises base stage, collector, emitter; Described base stage is connected with capacitor C 22 1 ends, resistance R 213 1 ends, slide rheostat R23 one end respectively; Described collector is connected with the negative pole of photodiode D24, and described emitter is through resistance R 212 ground connection; Described capacitor C 22 other ends are through resistance R 211 ground connection, and described resistance R 213 other ends are connected with the positive pole of photodiode D24, described slide rheostat R23 other end ground connection.
As shown in Figure 3, described fiber coupler 3 comprises optical fiber 31, polygon prism 32, and described polygon prism 32 is located in the optical fiber 31.
As shown in Figure 4; Described photoelectric commutator 4 comprises capacitor C 411, capacitor C 412, resistance R 42, amplifier 43, photodiode D44; Described photodiode D44 plus earth, the electrode input end of described photodiode D44 negative pole and amplifier 43, the negative input ground connection of described amplifier 43; Described capacitor C 412, resistance R 42 all are connected in parallel on amplifier 43 electrode input ends and amplifier 43 output terminals, and described amplifier 43 output terminals are connected with capacitor C 411.
As shown in Figure 5; Described surface acoustic wave output terminal 5 comprises the second input end power supply 51,52, the second input interdigital transducer lower end 53, the second input interdigital transducer upper end, 54, the second output interdigital transducer lower end 55, second output interdigital transducer upper end, and the described second input end power supply 51 and second is imported interdigital transducer and is connected.
Claims (7)
1. surface acoustic wave temperature sensor based on multiple coupled device; It is characterized in that; Comprise surface acoustic wave input end, electrical to optical converter, fiber coupler, photoelectric commutator, surface acoustic wave output terminal; Described photoelectric commutator, surface acoustic wave output terminal are equipped with two; Described surface acoustic wave input end, electrical to optical converter, fiber coupler connect successively, and described fiber coupler is connected with two photoelectric commutators respectively, and described two photoelectric commutators connect with corresponding surface acoustic wave output terminal respectively; One of them of two surface acoustic wave output terminals is provided with the responsive to temperature film.
2. a kind of surface acoustic wave temperature sensor according to claim 1 based on multiple coupled device; It is characterized in that; Described surface acoustic wave input end comprises first input end power supply, the first input interdigital transducer, first input end lead, first output interdigital transducer and first output terminal; Described first input end power supply is connected with the first input interdigital transducer through the first input end lead, and described first output interdigital transducer is connected with first output terminal.
3. a kind of surface acoustic wave temperature sensor according to claim 2 based on multiple coupled device; It is characterized in that; The described first input interdigital transducer upper end is connected with the positive pole of first input end power supply, and the described first input interdigital transducer lower end is connected with the negative pole of first input end power supply.
4. a kind of surface acoustic wave temperature sensor according to claim 1 based on multiple coupled device; It is characterized in that described electrical to optical converter comprises resistance R 211, resistance R 212, resistance R 213, capacitor C 22, slide rheostat R23, photodiode D24 and transistor Q25;
Described transistor Q25 comprises base stage, collector and emitter; Described base stage is connected with capacitor C 22 1 ends, resistance R 213 1 ends, slide rheostat R23 one end respectively; Described collector is connected with the negative pole of photodiode D24, and described emitter is through resistance R 212 ground connection;
Described capacitor C 22 other ends are through resistance R 211 ground connection, and described resistance R 213 other ends are connected with the positive pole of photodiode D24, described slide rheostat R23 other end ground connection.
5. a kind of surface acoustic wave temperature sensor based on multiple coupled device according to claim 1 is characterized in that described fiber coupler comprises optical fiber and polygon prism.
6. a kind of surface acoustic wave temperature sensor according to claim 1 based on multiple coupled device; It is characterized in that; Described photoelectric commutator comprises capacitor C 411, capacitor C 412, resistance R 42, amplifier and photodiode D44; Described photodiode D44 plus earth, the electrode input end of described photodiode D44 negative pole and amplifier, the negative input ground connection of described amplifier; Described capacitor C 412, resistance R 42 all are connected in parallel on amplifier anode input end and the amplifier out, and described amplifier out is connected with capacitor C 411.
7. a kind of surface acoustic wave temperature sensor according to claim 1 based on multiple coupled device; It is characterized in that; Described surface acoustic wave output terminal comprises the second input end power supply, the second input interdigital transducer and second output interdigital transducer, and the described second input end power supply is connected with the second input interdigital transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202651757U CN202216778U (en) | 2011-07-25 | 2011-07-25 | Acoustic urface wave temperature sensor based on multiple couplers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202651757U CN202216778U (en) | 2011-07-25 | 2011-07-25 | Acoustic urface wave temperature sensor based on multiple couplers |
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|---|---|
| CN202216778U true CN202216778U (en) | 2012-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202651757U Expired - Fee Related CN202216778U (en) | 2011-07-25 | 2011-07-25 | Acoustic urface wave temperature sensor based on multiple couplers |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901580A (en) * | 2011-07-25 | 2013-01-30 | 上海工程技术大学 | Multicoupler-based surface acoustic wave temperature sensor |
| CN105606245A (en) * | 2015-12-18 | 2016-05-25 | 中国电子科技集团公司第四十一研究所 | Non-contact temperature parameter extraction device in superhigh temperature environment |
-
2011
- 2011-07-25 CN CN2011202651757U patent/CN202216778U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901580A (en) * | 2011-07-25 | 2013-01-30 | 上海工程技术大学 | Multicoupler-based surface acoustic wave temperature sensor |
| CN102901580B (en) * | 2011-07-25 | 2014-05-28 | 上海工程技术大学 | Multicoupler-based surface acoustic wave temperature sensor |
| CN105606245A (en) * | 2015-12-18 | 2016-05-25 | 中国电子科技集团公司第四十一研究所 | Non-contact temperature parameter extraction device in superhigh temperature environment |
| CN105606245B (en) * | 2015-12-18 | 2018-08-17 | 中国电子科技集团公司第四十一研究所 | Temperature parameter extraction element under a kind of contactless hyperthermal environments |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20140725 |
|
| EXPY | Termination of patent right or utility model |