CN201464075U - Long-range SAW temperature sensing system - Google Patents
Long-range SAW temperature sensing system Download PDFInfo
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- CN201464075U CN201464075U CN2009200967813U CN200920096781U CN201464075U CN 201464075 U CN201464075 U CN 201464075U CN 2009200967813 U CN2009200967813 U CN 2009200967813U CN 200920096781 U CN200920096781 U CN 200920096781U CN 201464075 U CN201464075 U CN 201464075U
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Abstract
The utility model belongs to the technical field of intelligentized and networked temperature monitoring and relates to a long-range SAW (Surface Acoustic Wave) temperature sensing system. The system comprises a plurality of signal readers; each signal reader corresponds to at least one SAW temperature sensor; the SAW temperature sensors are passive; each signal reader comprises a microprocessor, a radio frequency signal transmitter module, a radio frequency receiving module and a communication module; the signal readers can work synchronously by corresponding to a plurality of SAW temperature sensors in a frequency division multiplexing or time division multiplexing manner; and the plurality of signal readers can work alternately in a time division multiplexing manner so as to share the frequency resource of the same frequency band. The utility model has the advantages of purely passive sensing head, replacement free, maintenance free, high long-term reliability, small volume, flexile and convenient installation and the like; and the manner of frequency division multiplexing or time division multiplexing is adopted for multi-point detection.
Description
Technical field
The utility model belongs to intelligent network temperature monitoring technical field, relates to a kind of temperature-sensing system.
Background technology
In the transformer station, the thermal effect of power equipment is the major reason of various faults and abnormal occurrence, therefore the temperature of power equipment is monitored closely, is to ensure the reliable indispensable means of power equipment.But the control point to temperature in the transformer station is very many, and isolating switch, mutual inductor, disconnector tie point reach hundreds of even thousands of, for temperature monitoring brings great inconvenience.Use thermal infrared imager regularly each device scan to be patrolled and examined now in the transformer station, regularly span is long, can't realize real time and on line monitoring, makes the safe operation of transformer station's items of equipment still exist hidden danger.
Along with the development of sensor technology, signal processing technology, computer technology, artificial intelligence technology, make that the state of temperature to each equipment of transformer station carries out on-line monitoring, in time finding potential faults and accumulative total property fault made prediction becomes possibility.It reduces maintenance frequency for the normal operation that guarantees substation equipment, and the operational reliability and the automaticity that improve electric system are significant.Because high-voltage switch contact is in high voltage, high-temperature, high-intensity magnetic field and the extremely strong electromagnetic interference environment, realize the thermometric to contact, must solve the adaptability of electronic measuring device under above-mentioned severe environmental conditions.In actual applications, can adopt optical fiber temperature-measurement, perhaps wireless temperature measurement.But because there is hidden danger in optical fiber temperature-measurement, cause easily creepage, harmful to human safety, so the wireless temperature measurement scheme more is subjected to the favor of power department.
Existing wireless temperature measurement scheme adopts battery or little CT to get and can give the thermometric chip power supply, and the signal that the thermometric chip is obtained sends by radio frequency chip is wireless again.Though this scheme has realized the wireless transmission of temperature signal, the electromagnetic interference (EMI) that exists in the transformer station is very big to the influence of chip temperature.In addition, because this scheme belongs to active scheme, sensing head needs powered battery or little CT to get to power.Powered battery exists need regularly change battery, and battery summer high-temperature resistance relatively poor, bring influence for the operation of power department; Little CT gets and can then exist if the joint electric current is less, and electric energy can't take out, and sensing head quits work, if the joint electric current is bigger, then burns out little CT easily until burning out sensing head.Adopt CT to get energy in addition, the sensing head volume is bigger, and the position that lays is very big to getting the energy efficiency influence, lacks general adaptability.
The utility model content
The utility model is at above-mentioned the deficiencies in the prior art, designed the wireless long-range temperature-sensing system of a kind of passive type, this temperature-sensing system adopts the surface acoustic wave temperature sensor technology, has overcome problems such as the energy supply difficulty that employing conventional wireless temperature sensor exists, complex structure, installation inconvenience.
For this reason, the utility model adopts following technical scheme:
A kind of long-range surface acoustic wave temperature-sensing system, comprise one or more signal read write line, corresponding at least one the surface acoustic wave temperature sensor of signal read write line, described surface acoustic wave temperature sensor is passive passive-type, comprise piezoelectric crystal, be arranged on the one or more resonators on the piezoelectric crystal, described signal read write line comprises microprocessor, the emission of radio frequency signals module that links to each other respectively with microprocessor, Receiver Module and communication module, wherein, the resonator of surface acoustic wave temperature sensor is transformed into surface signal by inverse piezoelectric effect with the radiofrequency signal that receives, this surface signal forms resonance on the piezoelectric crystal surface, and this resonator is transformed into acoustical signal the emission of radio frequency signals that is loaded with temperature information again and goes out; Microprocessor produces and emitting radio frequency signal by the emission of radio frequency signals module, receive the radiofrequency signal that is loaded with temperature information of launching from the surface acoustic wave temperature sensor by Receiver Module, Receiver Module is processed into the temperature digital signal and sends into microprocessor the radiofrequency signal that is loaded with temperature information that receives, the temperature digital signal Processing of microprocessor by the signal read write line to obtaining from each surface acoustic wave temperature sensor, send out with optical fiber communication or communication through communication module after the framing, each signal read write line can be simultaneously by channeling or the corresponding a plurality of surface acoustic wave temperature sensor work of time-multiplexed mode, a plurality of signal read write lines can take turns to operate by time-multiplexed mode, share the frequency resource of same frequency range.
As preferred implementation, long-range surface acoustic wave temperature-sensing system of the present utility model, described signal read write line be emitting radio frequency signal and accept radiofrequency signal simultaneously; Every suit long-range surface acoustic wave temperature-sensing system also comprises a background monitoring device, described background monitoring device links to each other with each signal read write line by optical fiber communication or radio communication, each signal read write line takes turns to operate in time-multiplexed mode, and the temperature digital signal of collecting is transferred to the background monitoring device; A long-range surface acoustic wave temperature-sensing system can hold 1～100 signal read write line, and each signal read write line holds 1～20 surface acoustic wave temperature sensor, and whole long-range surface acoustic wave temperature-sensing system support and the temperature of holding thousands of points are surveyed.
Compared with prior art, the utlity model has following advantage:
1. pure passive sensing head exempts to replace, and is non-maintaining, the long-term reliability height;
2. volume is little, convenient and flexible installation;
3. cost is low;
4. adopt frequency division multiplexing or time division multiplexing mode to support multiple spot to survey;
5. adopt optical fiber and digitized signal transmission data, realize long-distance sensing, anti-electromagnetic interference (EMI) can smooth upgrade and IEC61850 compatibility, the reliability height.
6. except Optical Fiber Transmission, also can use wireless transmission method, safe in utilization, no creepage phenomenon, the measuring accuracy height, anti-electromagnetic interference (EMI) can conveniently be expanded and other system interconnection.
7. possess a plurality of signal read-write equipment interfaces, be convenient to the signal read-write equipment and promptly connect i.e. usefulness, simultaneously, each signal read-write equipment can have multiple spot to survey, and is convenient to expansion scale and system upgrade.
8. adopt time division multiplexing mode control and transmit the multi way temperature Monitoring Data, improved the utilization factor of frequency.The wireless power launched of whole sensor system is not high like this, and frequency bandwidth takies few, but can realize that the temperature sensing of multiple spot long-range wireless and passive measures.Can avoid signal bumping.
Description of drawings
Accompanying drawing 1 is a wireless and passive sensing head difference transducer synoptic diagram of the present utility model;
Accompanying drawing 2 read-write equipment work synoptic diagram of the present utility model;
Accompanying drawing 3 is a system architecture diagram of the present utility model.
Embodiment
Surface acoustic wave techniques is an emerge science technical field of just growing up gradually the 1970s and 1980s in last century, and it is the frontier branch of science that acoustics and electronics combine.Surface acoustic wave is a kind of elastic wave of propagating along body surface.Have on the crystal of piezoelectricity owing to have piezoelectricity, existence coupling between electroacoustic.Piezoelectric crystal itself is the transducing medium, can make electroacoustics transducer on the piezoelectric crystal surface of propagating surface acoustic wave, and electric energy and acoustic energy are changed mutually.
SAW (Surface Acoustic Wave) device is making one or more sound-electric transducers a---interdigital transducer on piezoelectric substrate. and interdigital transducer can produce and receive surface acoustic wave effectively among Fig. 1. and this transducer is two groups of distributions that intermesh of deposition on a piezoelectric crystal surface that accurately is orientated and polishes, the metal band 111 (interdigital) of pectination, every group interdigital follows a bonding jumper that is referred to as bus-bar 110 to be connected. by bus-bar 110 electric signal be added in these two groups interdigital on, will produce with a pair of interdigital Electric Field Distribution that is spaced apart the cycle. be coupled by electroacoustic, promptly producing the distribution of an elastic strain. it excites the vibration of solid particle, and in the piezoelectric substrate medium, blazing abroad along the surface with elastic wave form with Electric Field Distribution. the principle of work of surface acoustic wave thermometric is as shown in Figure 1, after the on-chip transducer of piezoelectric crystal is transformed into acoustical signal by inverse piezoelectric effect with the wireless signal of importing, two periodicity grizzly bars reflect to form resonance about quilt. and the resonance frequency of this resonator is relevant with the temperature of substrate, and the change of resonance frequency is very linear relation with the change of temperature in certain temperature range. after same transducer was transformed into acoustical signal by piezoelectric effect the output of wireless answering signal, we just can obtain temperature value by the survey frequency variation.
The utility model can have many group signal read-write equipments, and every group of signal read-write equipment managed one group of several wireless and passive temp probe, and device inside comprises microprocessor, radiofrequency emitting module, Receiver Module and communication module.Referring to Fig. 2, each signal read write line can be simultaneously by channeling or the corresponding a plurality of surface acoustic wave temperature sensor work of time-multiplexed mode, and described radiofrequency emitting module, Receiver Module, communication module are connected with microprocessor.The radiofrequency emitting module emitting radio frequency signal is given described wireless and passive temp probe, and the wireless and passive temp probe will have the Receiver Module of the radio frequency signal feedback of temperature information to described signal read-write equipment.Described Receiver Module comprises a signal amplifier, wave filter and A/D converter unit.Described signal amplifier will feed back the radiofrequency signal that has temperature information and amplify, described wave filter carries out Filtering Processing to the signal after amplifying, filter noise, pass to described A/D converter unit again and carry out analog to digital conversion, give microprocessor with digital signal transfers then, microprocessor to digital signal resample, filtering, packing, send to described communication module, be sent to described background monitoring device.
Referring to Fig. 3, background monitoring device 3 of the present utility model connects the read write line of each sensing system 1 with optical fiber 2 or wireless mode, and controls each read write line and adopt channeling or time division multiplex working method.When adopting the time division multiplex working method, take turns to operate in chronological order, share the frequency resource of same frequency range.The wireless power launched of whole sensor system is not high like this, but can realize that the temperature sensing of multiple spot long-range wireless and passive measures.Signal bumping can be avoided, the measurement reliability can be improved.
Claims (4)
1. long-range surface acoustic wave temperature-sensing system, comprise one or more signal read write line, corresponding at least one the surface acoustic wave temperature sensor of signal read write line, described surface acoustic wave temperature sensor is passive passive-type, comprise piezoelectric crystal, be arranged on the one or more resonators on the piezoelectric crystal, described signal read write line comprises microprocessor, the emission of radio frequency signals module that links to each other respectively with microprocessor, Receiver Module and communication module, it is characterized in that, the resonator of surface acoustic wave temperature sensor is transformed into surface signal by inverse piezoelectric effect with the radiofrequency signal that receives, this surface signal forms resonance on the piezoelectric crystal surface, and this resonator is transformed into acoustical signal the emission of radio frequency signals that is loaded with temperature information again and goes out; Microprocessor produces and emitting radio frequency signal by the emission of radio frequency signals module, receive the radiofrequency signal that is loaded with temperature information of launching from the surface acoustic wave temperature sensor by Receiver Module, Receiver Module is processed into the temperature digital signal and sends into microprocessor the radiofrequency signal that is loaded with temperature information that receives, the temperature digital signal Processing of microprocessor by the signal read write line to obtaining from each surface acoustic wave temperature sensor, send out with optical fiber communication or communication through communication module after the framing, each signal read write line can be simultaneously by channeling or the corresponding a plurality of surface acoustic wave temperature sensor work of time-multiplexed mode, a plurality of signal read write lines can take turns to operate by time-multiplexed mode, share the frequency resource of same frequency range.
2. long-range surface acoustic wave temperature-sensing system according to claim 1 is characterized in that, described signal read write line is emitting radio frequency signal and accept radiofrequency signal simultaneously.
3. long-range surface acoustic wave temperature-sensing system according to claim 1, it is characterized in that, every suit long-range surface acoustic wave temperature-sensing system also comprises a background monitoring device, described background monitoring device links to each other with each signal read write line by optical fiber communication or radio communication, each signal read write line takes turns to operate in time-multiplexed mode, and the temperature digital signal of collecting is transferred to the background monitoring device.
4. long-range surface acoustic wave temperature-sensing system according to claim 1, it is characterized in that: a long-range surface acoustic wave temperature-sensing system can hold 1～100 signal read write line, each signal read write line holds 1～20 surface acoustic wave temperature sensor, and whole long-range surface acoustic wave temperature-sensing system support and the temperature of holding thousands of points are surveyed.
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| CN2009200967813U CN201464075U (en) | 2009-05-15 | 2009-05-15 | Long-range SAW temperature sensing system |
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| CN2009200967813U CN201464075U (en) | 2009-05-15 | 2009-05-15 | Long-range SAW temperature sensing system |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103021A (en) * | 2010-12-31 | 2011-06-22 | 深圳市虹远通信有限责任公司 | Temperature detection method and device based on passive wireless temperature sensor |
| CN102353473A (en) * | 2011-06-23 | 2012-02-15 | 成都赛康信息技术有限责任公司 | Wireless sensor network remote temperature online monitoring system based on surface acoustic wave |
| CN102768081A (en) * | 2012-07-27 | 2012-11-07 | 重庆市电力公司永川供电局 | Passive wireless temperature measuring system for capacitors of transformer substation |
| CN102980679A (en) * | 2012-11-29 | 2013-03-20 | 中国电力科学研究院 | Device and method for measuring interior temperature of GIS equipment by surface acoustic wave sensor |
| CN103278259A (en) * | 2013-04-27 | 2013-09-04 | 国家电网公司 | Wireless passive temperature measuring system for high-tension switch cabinet |
| CN103308190A (en) * | 2012-03-14 | 2013-09-18 | 朱斌 | Temperature monitoring system and method for high-voltage charged body with zero power consumption chip implantation and wireless network mode |
| CN103983371A (en) * | 2014-04-24 | 2014-08-13 | 国家电网公司 | Method for measuring operating temperature of transformer lead connector based on surface acoustic waves |
| CN105043584A (en) * | 2015-07-10 | 2015-11-11 | 北京中讯四方科技股份有限公司 | Wireless temperature measurement system |
| CN105092080A (en) * | 2015-03-03 | 2015-11-25 | 重庆感知沃德科技发展有限公司 | Novel frequency sweep algorithm applied to surface acoustic wave wireless passive temperature measurement system |
| 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 |
| CN106197736A (en) * | 2016-07-07 | 2016-12-07 | 深圳市罗庚电气有限公司 | A kind of wireless and passive prefabricated cable unplugg monitor and using method thereof |
| CN107110718A (en) * | 2014-11-06 | 2017-08-29 | 应用材料公司 | The method of measure of the change temperature in the speed of refraction and the ripple with magnetic susceptibility |
| CN107202652A (en) * | 2017-06-07 | 2017-09-26 | 重庆工商大学 | A kind of utilization surface acoustic wave detects the system and detection method of automobile absorber temperature |
| CN107515062A (en) * | 2017-08-08 | 2017-12-26 | 雅泰歌思（上海）通讯科技有限公司 | A kind of high-precision SAW array sensor |
| CN108593136A (en) * | 2018-05-18 | 2018-09-28 | 中国科学技术大学先进技术研究院 | A kind of wearable temperature monitoring method based on passive wireless acoustic surface wave |
| CN111121988A (en) * | 2019-12-30 | 2020-05-08 | 中国船舶重工集团公司第七一一研究所 | Temperature measuring device and temperature measuring method suitable for V-shaped engine connecting rod bearing bush |
-
2009
- 2009-05-15 CN CN2009200967813U patent/CN201464075U/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103021A (en) * | 2010-12-31 | 2011-06-22 | 深圳市虹远通信有限责任公司 | Temperature detection method and device based on passive wireless temperature sensor |
| CN102353473A (en) * | 2011-06-23 | 2012-02-15 | 成都赛康信息技术有限责任公司 | Wireless sensor network remote temperature online monitoring system based on surface acoustic wave |
| CN103308190A (en) * | 2012-03-14 | 2013-09-18 | 朱斌 | Temperature monitoring system and method for high-voltage charged body with zero power consumption chip implantation and wireless network mode |
| CN102768081A (en) * | 2012-07-27 | 2012-11-07 | 重庆市电力公司永川供电局 | Passive wireless temperature measuring system for capacitors of transformer substation |
| CN102980679A (en) * | 2012-11-29 | 2013-03-20 | 中国电力科学研究院 | Device and method for measuring interior temperature of GIS equipment by surface acoustic wave sensor |
| CN103278259A (en) * | 2013-04-27 | 2013-09-04 | 国家电网公司 | Wireless passive temperature measuring system for high-tension switch cabinet |
| CN103983371A (en) * | 2014-04-24 | 2014-08-13 | 国家电网公司 | Method for measuring operating temperature of transformer lead connector based on surface acoustic waves |
| CN107110718A (en) * | 2014-11-06 | 2017-08-29 | 应用材料公司 | The method of measure of the change temperature in the speed of refraction and the ripple with magnetic susceptibility |
| CN107110718B (en) * | 2014-11-06 | 2019-11-12 | 应用材料公司 | The method of measure of the change temperature by reflecting and in the speed of the wave with magnetic susceptibility |
| CN105092080A (en) * | 2015-03-03 | 2015-11-25 | 重庆感知沃德科技发展有限公司 | Novel frequency sweep algorithm applied to surface acoustic wave wireless passive temperature measurement system |
| CN105092080B (en) * | 2015-03-03 | 2018-01-05 | 重庆感知沃德科技发展有限公司 | A kind of new Method of Sweeping Algorithm applied in the passive temp measuring system of surface acoustic wave wireless |
| CN105043584A (en) * | 2015-07-10 | 2015-11-11 | 北京中讯四方科技股份有限公司 | Wireless temperature measurement system |
| 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 |
| CN106197736A (en) * | 2016-07-07 | 2016-12-07 | 深圳市罗庚电气有限公司 | A kind of wireless and passive prefabricated cable unplugg monitor and using method thereof |
| CN107202652A (en) * | 2017-06-07 | 2017-09-26 | 重庆工商大学 | A kind of utilization surface acoustic wave detects the system and detection method of automobile absorber temperature |
| CN107515062A (en) * | 2017-08-08 | 2017-12-26 | 雅泰歌思（上海）通讯科技有限公司 | A kind of high-precision SAW array sensor |
| CN108593136A (en) * | 2018-05-18 | 2018-09-28 | 中国科学技术大学先进技术研究院 | A kind of wearable temperature monitoring method based on passive wireless acoustic surface wave |
| CN111121988A (en) * | 2019-12-30 | 2020-05-08 | 中国船舶重工集团公司第七一一研究所 | Temperature measuring device and temperature measuring method suitable for V-shaped engine connecting rod bearing bush |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20180515 |