CN103557958A - Passive wireless temperature measuring antenna device - Google Patents
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- CN103557958A CN103557958A CN201310490433.5A CN201310490433A CN103557958A CN 103557958 A CN103557958 A CN 103557958A CN 201310490433 A CN201310490433 A CN 201310490433A CN 103557958 A CN103557958 A CN 103557958A
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Abstract
The invention discloses a passive wireless temperature measuring antenna device, and belongs to the technical field of temperature monitoring devices of substation equipment. The passive wireless temperature measuring antenna device facilitates wireless monitoring of the contact temperature of the substation equipment. According to the technical scheme of the passive wireless temperature measuring antenna device, a passive wireless temperature measuring sensor comprises an interdigital transducer, a reflecting grating, a piezoelectric substrate and a sensor antenna, wherein the interdigital transducer and the reflecting grating are arranged on the piezoelectric substrate, the sensor antenna is electrically connected with the interdigital transducer, and a helical antenna is adopted in the sensor antenna. The passive wireless temperature measuring antenna device is applicable to the electric power department.
Description
Technical field
Passive and wireless thermometric antenna assembly of the present invention, belongs to substation equipment device for detecting temperature technical field.
Background technology
Power grid security is produced and is not only a huge and complicated systems engineering, and be Utilities Electric Co. and even whole society's reform, the basis of development and stabilization, it is the most important thing of following China and even the development of whole world intelligent grid, State Council issued in a series of vital documents such as the < < Green Development white paper > > of State Grid Corporation of China in < < National Program for Medium-to Long-term Scientific and Technological Development > > and the national grid of in February, 2006 issue April 19, intelligent grid safety guarantee has been included the great theme of first developing and setting about implementing of country in.
Each equipment in transformer station is in During Process of Long-term Operation, the positions such as the contact of switch and bus connection are because of aging or contact resistance is excessive generates heat, and the temperature of these heating positions cannot be monitored, finally cause thus accident to occur, power equipment safety reliability is the important step that ultra-large power transmission and distribution and power grid security ensure, in lasting expansion power supply, bring a series of safety problem to electrical network electric equipment simultaneously, for avoiding as much as possible all kinds of electric power accidents, the task of power equipment safety operation monitoring is in real time extremely urgent.
An important hidden danger of the contact in grid equipment and the power grid security of joint, existing statistics shows, it mainly occurs in fault as upper/lower positions: one, dynamic and static contact fault in switch cubicle, switch cubicle is as a kind of power equipment of extensive utilization, switch cubicle is the visual plant in electrical power trans mission/distribution system, is bearing the vital role of cut-offfing and closing power circuit, line fault protection, monitoring operation electric quantity data; Switchgear is bad because of the dynamic and static contact of primary cut-out, adds that the factors such as long-term large electric current, contact are aging easily cause its contact resistance and increase, thereby causes long-time heating, the too high high-voltage board that even finally occurs of contact temperature rise to burn fault; Two, cable splice fault, along with loosening, the insulation ag(e)ing of the prolongation of working time, crimp head and shelf depreciation, high-pressure leakage etc., the rising of heating and temperature will be caused, the rising of temperature will make these situations further worsen, this will impel temperature further to promote, the result of this vicious cycle just causes short circuit blows out, even fire.
For solving this difficult problem, from temperature-measurement principle, conventionally there are several modes, from transmission of angle, comprise wired and Wireless Data Transmission mode.
One, conventional thermometric mode: the shortcoming of the thermometric modes such as conventional thermopair, thermal resistance, semiconductor temperature sensor is cannot wireless and passive, need plain conductor signal transmission, cannot independent wireless work, insulating property can not guarantee, even employing wireless sending module, under magnetic field, electric field and the thermal field complex situations of electrical network, antijamming capability is weak and cannot work.
Two, optical fiber temperature-measurement: fibre optic temperature sensor adopts fiber optic transmission temperature signal, light transmitting fiber has excellent insulating property, high pressure in can isolating switch cabinet, therefore fibre optic temperature sensor can directly be installed on the high-voltage contact in switch cubicle, the running temperature of Measurement accuracy high-voltage contact, realize the on-line monitoring of switch cubicle contact running temperature, yet, optical fiber has easy to break, easily broken, the characteristics such as non-refractory, thereby after accumulation dust, easily cause optical fiber creeping discharge that insulativity is reduced, optical fiber belongs to wired mode, can destroy existing equipment framework, affected by switch cabinet structure, the difficulty that connects up in cabinet is larger, in addition, the cost of optical fiber temperature-measurement is also relatively high.
Three, infrared measurement of temperature: infrared measurement of temperature is contactless temperature-measuring, in the temperature monitoring of the equipment such as transformer station's sleeve pipe, lightning arrester, bus, apply more, but because high-tension switch cabinet inner structure is complicated, element blocks mutually more, by infared spectrum, indirectly obtaining its accuracy of temperature data can not meet the demands, and to the Computer Recognition Technology level of infared spectrum, can't substitute artificial cognition, and automaticity is not high, the cost of thermal infrared imager is higher simultaneously, is unfavorable for promoting the use of; Infrared measurement of temperature is subject to environment and the interference of electromagnetic field around in addition, because the space in switch cubicle is very narrow and small, cannot installation infrared temperature probe (because probe must keep certain safe distance with testee, and need to be over against the surface of testee), require measured point can in the visual field, there is no coverage, and surface clean, to guarantee accuracy, has dead angle to occur while therefore using infrared thermoviewer to carry out temperature survey to it, cannot all monitor; Infrared thermoviewer is measured and must staff be held instrument and measure to scene, cannot realize long-range, Real-Time Monitoring, wastes a large amount of manpowers; When the disconnecting link to outdoor etc. is monitored, due to distant, cost is higher, runs into ice and snow weather, and this monitoring of equipment was lost efficacy.
Four, active radio thermometric: active radio temperature sensor size conventionally relatively large and need is often changed battery, system maintenance cost is higher, simultaneously, battery is unsuitable for working under the condition of high temperature, excess Temperature can affect battery normal operation, finally affect measuring accuracy, even there will be false alarm; When battery electric quantity is not enough, there will be the phenomenon of false alarm in addition, affect monitoring accuracy; The antenna that current most wireless senser adopts is in addition common sucker antenna, and this antenna, due to its profile reason, when the contact temperature monitoring in switch cubicle, cannot be realized the installation in handcart cabinet.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, and technical matters to be solved is: a kind of device that facilitates substation equipment contact temperature wireless monitor is provided.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: passive and wireless thermometric antenna assembly, passive and wireless temperature probe comprises interdigital transducer, reflecting grating, piezoelectric substrate and sensor antenna, described interdigital transducer and reflecting grating are arranged on piezoelectric substrate, described sensor antenna is electrically connected to interdigital transducer, and sensor antenna adopts helical antenna.
Described sensor antenna is the helical antenna of omnidirectional in normal orientation.
Sensor antenna in described passive and wireless temperature probe is connected and carries out communication with the collector antenna of Temperature sampler by wireless radiofrequency network.
Described collector antenna adopts dipole antenna.
Described collector antenna is spiral arm dipole sky.
The beneficial effect that the present invention compared with prior art has is:
One, the present invention arranges helical antenna on passive and wireless temperature probe, can be good at solving the problem of switch cubicle narrow space, and all directions can both receive the request signal of Temperature sampler, spiral arm dipole antenna is set on Temperature sampler, can make Temperature sampler can arbitrarily adjust in its installation site, integral body has reduced engineering and has raised the difficulty that between line all day, directivity is aimed at;
Two, without power supply, reduce high maintenance and false alarm that battery produces, sensor adopts passive induction mode, without battery-operated, has reduced the maintenance cost that battery altering brings, and can not impact ecologic environment simultaneously;
Three, safe and reliable, wireless temperature sampling mode is without line in measured point or related support structure, between sensor and receiving equipment without electrical link, thereby realized high pressure isolation, support equipment safe operation;
Four, easy for installation flexibly, temperature sensor volume little and and collector between data wireless transmission, easy for installation flexibly, be not subject to switch cabinet structure and spacial influence.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described in detail:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of sensor antenna in the present invention;
Fig. 3 is the structural representation of collector antenna in the present invention;
In figure:, 1 be that interdigital transducer, 2 is for reflecting grating, 3 is for piezoelectric substrate, 4 is for sensor antenna, 5 is for passive and wireless temperature probe, 6 is for Temperature sampler, 7 is for collector antenna.
Embodiment
As shown in Figure 1, passive and wireless thermometric antenna assembly of the present invention, passive and wireless temperature probe 5 comprises interdigital transducer 1, reflecting grating 2, piezoelectric substrate 3 and sensor antenna 4, described interdigital transducer 1 and reflecting grating 2 are arranged on piezoelectric substrate 3, described sensor antenna 4 is electrically connected to interdigital transducer 1, sensor antenna 4 adopts helical antenna, and the sensor antenna 4 in described passive and wireless temperature probe 5 is connected and carries out communication with the collector antenna 7 of Temperature sampler 6 by wireless radiofrequency network.
Described interdigital transducer 1(is called for short IDT), it is the core component of SAW (Surface Acoustic Wave) device, IDT is a kind of sound-electric transducer that excites on piezoelectric crystal and detect surface acoustic wave temperature, IDT is deposited on metallic aluminium on piezoelectric substrate 3 by semiconductor planar technique, then by photoetching technique, metallic film is carved into the structure of specific size and shape.
Described reflecting grating 2 is Primary Components of realizing surface acoustic wave temperature resonator, surface acoustic wave temperature can only form surface acoustic wave temperature catoptron based on reflector array, surface acoustic wave temperature reflecting grating array has two kinds of reflective trenches and reflective metals bands, wherein groove reflective array performance is better, but metallic reflection grating array is the most easily realized.
The present invention in use needs to be equipped with the Temperature sampler 6 that can transmit and receive radio frequency signal, temperature sensor is directly installed on testee surface, it is responsible for receiving and inquires after radiofrequency signal, and the radiofrequency signal of returning with temperature information arrives Temperature sampler 6, temperature sensor is to adopt the design of surface acoustic wave (Surface Acoustic Wave) sensing technology, sensor surface wave technology has been applied the physical characteristics of crystalline material, the change of the physical characteristics of crystal has been changed into electric signal automatically by piezoelectricity principle of induction, the principle of work of sensor is the surface to piezoelectric by emission of radio frequency signals, then the reflection wave that is subject to temperature and has affected is gone back to electric signal again and obtains temperature data.
Temperature acquisition process of the present invention comprises the steps: one, Temperature sampler 6 is by its antenna transmission radio-frequency pulse, two, after pulse signal is received by sensor antenna 4, by interdigital transducer 1(IDT) at surface wave of surface activation of piezoelectric inductor; Three, there is variation owing to being subject to the impact of sensor self-temperature in sensor surface wave frequency, is subject to the mechanism of temperature variation just because of frequency, and temperature data measurement is achieved; Four, interdigital transducer 1 changes into radiofrequency signal by the hunting of frequency of surface wave again, and this radiofrequency signal is processed after being received by the antenna on collector; Five, due to the high-quality characteristic of resonator, even if access ripple has the bandwidth of 50Hz, also guaranteed that the signal reflecting has comprised accurate radio-frequency information; Six, the rf frequency reflecting changes the proportionate relationship that is varied to temperature.
Described Temperature sampler 6 is responsible for communicating by letter with one group of temperature sensor, transmitting thermometric is inquired after radiofrequency signal to temperature sensor, receive the return signal of temperature sensor, and resolve to temperature information and send it back temperature monitoring Master Station Software system, Temperature sampler 6 is connected with collector antenna 7, described collector antenna 7 is embedded in switch cubicle inwall, like this, can shield outside wave interference, other parts (receiving magazine) of Temperature sampler 6 are arranged on the outside of switch cubicle, collector antenna 7 is adsorbed on cabinet wall by the gap with cabinet through dividing plate, Temperature sampler 6 is placed on top, this cabinet door can be opened without having a power failure, facilitate managerial personnel to operate.
Antenna is indispensable parts in wireless communication system, be the important tool of contact emitter and receiving trap, its basic function is for receiving and radiated electromagnetic wave, in this passive sensing system, for increasing wireless sensing distance, adoptable method has: the gain and the performance that improve antenna; Increase the emissive power of transmitter and the receiving sensitivity of receiver; Native system works in the public wave band of 429-436MHz, the signal transmission power of this wave band of national regulation must not surpass 10mW, the sensitivity of receiver is just difficult to after arriving to a certain degree promote, highly sensitive receiver cost is also very large, design high performance antenna can clearly improve the performance of wireless sensing system, thereby the design tool of antenna has very important significance.
Known according to the characteristic of antenna: the ratio of gains omnidirectional antenna with direction-sense antenna wants high, directivity is more obvious, gain in its greatest irradiation direction is maximum, in addition, performance for wireless communications between antenna is affected by the level of impedance match between antenna and transmission line, load, the impedance matching of antenna and transmission line and load must be better, antenna just greatly the energy of signal source launch maybe the signal energy of reception passed.
As shown in Figures 2 and 3, described sensor antenna 4 is the helical antenna of omnidirectional in normal orientation, can be good at solving the problem of switch cubicle narrow space, and all directions can both receive the request signal of Temperature sampler 6; Described collector antenna 7 is spiral arm dipole antenna, can make Temperature sampler 6 can arbitrarily adjust in its installation site, and integral body has reduced engineering and raised the difficulty that between line all day, directivity is aimed at.
Above-mentioned collector antenna 7 at 433M place in theory total length be 34cm, to not accepting in this engineering, in the present invention, we replace two arms of dipole antenna with spiral helicine tinsel, and silver-plated on tinsel (experiment show silver-plated than copper facing and when gold-plated the gain of antenna larger), the benefit of doing is like this, spiral helicine winding has realized less lateral length, and effective length still can reach 34cm.Its greatest irradiation directive gain reaches 2.8dB; Described sensor antenna 4 is omnidirectional radiation in normal direction, but its gain is less; In the present invention, the impedance of collector antenna 7 approaches 50, matches with coaxial transmission line; Sensor antenna 4 mates with the impedance phase of sensing head, can reach optimal communication effect like this; Experiment shows, outdoor, the steady operation of this wireless communication system distance can reach 3m; In switch cubicle, signal is stronger, remains on stable wireless sensing state.
By reference to the accompanying drawings embodiments of the invention are explained in detail above, but the present invention is not limited to above-described embodiment, in the ken possessing those of ordinary skills, can also under the prerequisite that does not depart from aim of the present invention, makes a variety of changes.
Claims (5)
1. passive and wireless thermometric antenna assembly, it is characterized in that: passive and wireless temperature probe (5) comprises interdigital transducer (1), reflecting grating (2), piezoelectric substrate (3) and sensor antenna (4), described interdigital transducer (1) and reflecting grating (2) are arranged on piezoelectric substrate (3), described sensor antenna (4) is electrically connected to interdigital transducer (1), and sensor antenna (4) adopts helical antenna.
2. passive and wireless thermometric antenna assembly according to claim 1, is characterized in that: described sensor antenna (4) is the helical antenna of omnidirectional in normal orientation.
3. passive and wireless thermometric antenna assembly according to claim 1 and 2, is characterized in that: the sensor antenna (4) in described passive and wireless temperature probe (5) is connected and carries out communication with the collector antenna (7) of Temperature sampler (6) by wireless radiofrequency network.
4. passive and wireless thermometric antenna assembly according to claim 3, is characterized in that: described collector antenna (7) adopts dipole antenna.
5. passive and wireless thermometric antenna assembly according to claim 4, is characterized in that: described collector antenna (7) is spiral arm dipole antenna.
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| CN201310490433.5A CN103557958A (en) | 2013-10-19 | 2013-10-19 | Passive wireless temperature measuring antenna device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184641A (en) * | 2014-09-11 | 2014-12-03 | 国网山西省电力公司太原供电公司 | Substation equipment contact state analysis and early-warning annular network platform |
| CN104202405A (en) * | 2014-09-11 | 2014-12-10 | 国网山西省电力公司太原供电公司 | Bus network platform for online monitoring of substation equipment contact statuses |
| CN104202406A (en) * | 2014-09-11 | 2014-12-10 | 国网山西省电力公司太原供电公司 | Circular network platform for online monitoring of substation equipment contact statuses |
| CN104406711A (en) * | 2014-12-10 | 2015-03-11 | 广东电网有限责任公司电力科学研究院 | SAW (Surface Acoustic Wave)-technology-based online monitoring system and monitoring method for running temperature of circuit breaker in GIS |
| CN104458053A (en) * | 2014-12-10 | 2015-03-25 | 广东电网有限责任公司电力科学研究院 | GIS internal bus operating temperature online monitoring system and method based on acoustic surface wave technology |
| CN104142191B (en) * | 2014-08-22 | 2016-08-17 | 广东电网有限责任公司电力科学研究院 | Vacuum isolation circuit breakers In-Line Temperature Measure System |
| CN108844653A (en) * | 2018-07-16 | 2018-11-20 | 湖北工业大学 | A kind of temperature checking method based on passive and wireless radio frequency temperature sensor |
| CN110346062A (en) * | 2019-07-19 | 2019-10-18 | 国家电网有限公司 | A kind of unit rotor magnetic-pole connection wire temperature measuring equipment |
| CN110736563A (en) * | 2019-10-24 | 2020-01-31 | 深圳市三和电力科技有限公司 | Passive wireless temperature sensor suitable for distribution temperature monitoring early warning system |
| CN114730985A (en) * | 2019-12-03 | 2022-07-08 | 阿自倍尔株式会社 | Wireless sensor |
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| CN102708394A (en) * | 2012-04-17 | 2012-10-03 | 重庆大学 | SAW (surface acoustic wave)-based passive temperature tag and SAW-based passive temperature tag reader |
| CN102709678A (en) * | 2012-05-23 | 2012-10-03 | 西北工业大学 | Miniaturization S-band vertical polarization wideband dipole antenna |
| CN203551142U (en) * | 2013-10-19 | 2014-04-16 | 国家电网公司 | Passive wireless temperature measurement antenna device |
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2013
- 2013-10-19 CN CN201310490433.5A patent/CN103557958A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102708394A (en) * | 2012-04-17 | 2012-10-03 | 重庆大学 | SAW (surface acoustic wave)-based passive temperature tag and SAW-based passive temperature tag reader |
| CN102709678A (en) * | 2012-05-23 | 2012-10-03 | 西北工业大学 | Miniaturization S-band vertical polarization wideband dipole antenna |
| CN203551142U (en) * | 2013-10-19 | 2014-04-16 | 国家电网公司 | Passive wireless temperature measurement antenna device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142191B (en) * | 2014-08-22 | 2016-08-17 | 广东电网有限责任公司电力科学研究院 | Vacuum isolation circuit breakers In-Line Temperature Measure System |
| CN104184641A (en) * | 2014-09-11 | 2014-12-03 | 国网山西省电力公司太原供电公司 | Substation equipment contact state analysis and early-warning annular network platform |
| CN104202405A (en) * | 2014-09-11 | 2014-12-10 | 国网山西省电力公司太原供电公司 | Bus network platform for online monitoring of substation equipment contact statuses |
| CN104202406A (en) * | 2014-09-11 | 2014-12-10 | 国网山西省电力公司太原供电公司 | Circular network platform for online monitoring of substation equipment contact statuses |
| CN104406711A (en) * | 2014-12-10 | 2015-03-11 | 广东电网有限责任公司电力科学研究院 | SAW (Surface Acoustic Wave)-technology-based online monitoring system and monitoring method for running temperature of circuit breaker in GIS |
| CN104458053A (en) * | 2014-12-10 | 2015-03-25 | 广东电网有限责任公司电力科学研究院 | GIS internal bus operating temperature online monitoring system and method based on acoustic surface wave technology |
| CN108844653A (en) * | 2018-07-16 | 2018-11-20 | 湖北工业大学 | A kind of temperature checking method based on passive and wireless radio frequency temperature sensor |
| CN110346062A (en) * | 2019-07-19 | 2019-10-18 | 国家电网有限公司 | A kind of unit rotor magnetic-pole connection wire temperature measuring equipment |
| CN110736563A (en) * | 2019-10-24 | 2020-01-31 | 深圳市三和电力科技有限公司 | Passive wireless temperature sensor suitable for distribution temperature monitoring early warning system |
| CN114730985A (en) * | 2019-12-03 | 2022-07-08 | 阿自倍尔株式会社 | Wireless sensor |
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Application publication date: 20140205 |