CN111141410A - Passive wireless temperature measuring device of circuit breaker contact - Google Patents
Passive wireless temperature measuring device of circuit breaker contact Download PDFInfo
- Publication number
- CN111141410A CN111141410A CN202010073720.6A CN202010073720A CN111141410A CN 111141410 A CN111141410 A CN 111141410A CN 202010073720 A CN202010073720 A CN 202010073720A CN 111141410 A CN111141410 A CN 111141410A
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- reader
- contact
- passive
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000005284 excitation Effects 0.000 claims abstract description 8
- 239000000741 silica gel Substances 0.000 claims abstract description 8
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims description 2
- 238000010897 surface acoustic wave method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009421 internal insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/22—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of acoustic effects
- G01K11/26—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of acoustic effects of resonant frequencies
- G01K11/265—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of acoustic effects of resonant frequencies using surface acoustic wave [SAW]
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
本发明公开了一种断路器触头的无源无线测温装置，包括设置于断路器触头上的无线无源温度传感器，以及与所述无线无源温度传感器对应的阅读器，所述无线无源温度传感器通过导热硅胶粘附在所述断路器触头上，其包括PCB板和通过导热硅胶封装在PCB板上的声表面波元件，所述声表面波元件上的中部刻有叉指换能器，在叉指换能器两侧刻有反射栅，所述叉指换能器通过天线外接所述阅读器；所述阅读器设置在断路器室开关处，所述阅读器发射激励信号并获取表征温度信息的回波信号；所述阅读器包括依次连接的信号处理与控制模块、温度补偿电路模块、发射机、射频开关和接收机。本发明能够安全、准确的对断路器触头温度进行在线测量。
The invention discloses a passive wireless temperature measurement device for a circuit breaker contact, comprising a wireless passive temperature sensor arranged on the circuit breaker contact, and a reader corresponding to the wireless passive temperature sensor. The passive temperature sensor is adhered to the contact of the circuit breaker through thermal conductive silica gel, which includes a PCB board and a surface acoustic wave element encapsulated on the PCB board through thermal conductive silica gel, and the middle of the surface acoustic wave element is engraved with interdigital fingers Transducer, reflection gratings are engraved on both sides of the interdigital transducer, and the interdigital transducer is connected to the reader through an antenna; the reader is arranged at the switch of the circuit breaker room, and the reader emits excitation signal and obtain echo signals representing temperature information; the reader includes a signal processing and control module, a temperature compensation circuit module, a transmitter, a radio frequency switch and a receiver which are connected in sequence. The invention can safely and accurately measure the temperature of the contacts of the circuit breaker on-line.
Description
Technical Field
The invention relates to a passive wireless temperature measuring device for a breaker contact in the field of power distribution online monitoring.
Background
The China power industry is continuously developed, the construction of an intelligent power distribution network is gradually promoted, and the requirements on a power equipment detection device are higher and higher. A circuit breaker is one of the most commonly used switching devices in power systems, operating at high voltages and currents, and switches are also associated with arcing and high heat. The operational reliability of the circuit breaker is directly related to the temperature of the contacts. When the contacts of the circuit breaker encounter the conditions of arc impact, overload, incomplete closing, mechanical looseness and the like, the contact conditions of the contacts are deteriorated, and the phenomenon that the contacts are burnt due to overheating can be generated, so that the temperature of the contacts of the circuit breaker is highest in the whole circuit breaker chamber in most circuit breaker faults. According to the statistics of the national power grid, the contact overheating problem in the breaker fault accounts for more than 60%. It is therefore necessary to make temperature measurements of the breaker contacts. Common modes include infrared temperature measurement, optical fiber temperature measurement, sensor temperature measurement and the like. The infrared temperature measurement technology mainly adopts a thermal imager, is mainly used for inspection, but has limited infrared penetration capacity, and limits the measurement of the internal temperature of the circuit breaker. The optical fiber temperature measurement adopts a limited temperature measurement mode, and light is wound on a contact of the circuit breaker, so that certain potential safety hazards are caused. The temperature sensor generally uses a thermocouple, a thermal resistor or a semiconductor temperature sensor for measurement, the technology is mature, the performance is reliable, and the problems of communication electromagnetic interference and internal insulation cannot be avoided.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a passive wireless temperature measuring device for a contact of a circuit breaker, which can safely and accurately measure the temperature of the contact of the circuit breaker on line.
One technical scheme for achieving the above purpose is as follows: a passive wireless temperature measuring device of a circuit breaker contact comprises a wireless passive temperature sensor arranged on the circuit breaker contact and a reader corresponding to the wireless passive temperature sensor;
the wireless passive temperature sensor is attached to the breaker contact through heat-conducting silica gel and comprises a PCB and an acoustic surface wave element packaged on the PCB through the heat-conducting silica gel, an interdigital transducer is engraved in the middle of the acoustic surface wave element, reflection gratings are engraved on two sides of the interdigital transducer, and the interdigital transducer is externally connected with the reader through an antenna;
the reader is arranged at a switch of the breaker chamber, and transmits an excitation signal and acquires an echo signal representing temperature information; the reader comprises a signal processing and control module, a temperature compensation circuit module, a transmitter, a radio frequency switch and a receiver which are sequentially connected, wherein the signal processing and control module
Further, the PCB is made of heat-conducting ceramic.
Furthermore, the transmitter consists of a two-channel direct digital frequency synthesizer, a filter, a high-speed switch and a transmitting power amplifier which are sequentially connected in series.
Further, the receiver comprises a radio frequency front-end filter, a low noise amplifier, an isolating switch, an automatic gain controller, a first signal lamp, a first low-pass filter, a second signal lamp, a second low-pass filter and a PLL frequency synthesizer, the radio frequency front-end filter, the low noise amplifier, the isolating switch and the automatic gain controller are sequentially connected in series, the output end of the automatic gain controller is respectively connected with the first signal lamp and the second signal lamp, the first signal lamp is respectively connected with the first low-pass filter and the PLL frequency synthesizer, and the second signal lamp is connected with the second low-pass filter.
According to the passive wireless temperature measuring device for the circuit breaker contact, the wireless passive temperature sensor and the antenna thereof are fixed on the circuit breaker contact, the switch of the circuit breaker chamber is provided with the reader, and the reader is used for transmitting the excitation signal and acquiring the echo signal representing the temperature information. The invention can effectively measure the temperature of the breaker contact, and the detection device can monitor the temperature change condition of the contact in time.
Drawings
Fig. 1 is a schematic structural diagram of a passive wireless temperature measuring device of a circuit breaker contact according to the present invention.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is made by specific examples:
the invention discloses a passive wireless temperature measuring device for a contact of a circuit breaker, which comprises a wireless passive temperature sensor arranged on the contact of the circuit breaker and a reader corresponding to the wireless passive temperature sensor.
The wireless passive temperature sensor is attached to a contact of the circuit breaker through the heat-conducting silica gel, the wireless passive temperature sensor comprises a PCB and an acoustic surface wave element packaged on the PCB through the heat-conducting silica gel, an interdigital transducer is carved in the middle of the acoustic surface wave element, reflection gratings are carved on two sides of the interdigital transducer, and the interdigital transducer is externally connected with a reader through an antenna. A radio frequency excitation signal sent by the reader is captured by the interdigital transducer, generates surface acoustic waves in the surface acoustic wave element, returns to the interdigital transducer after being enhanced by the reflection grating, and is converted into a radio frequency echo signal through an inverse piezoelectric effect to be sent back. The acoustic surface wave speed is related to the temperature of the piezoelectric substrate, the wave speed determines the resonant frequency of the piezoelectric substrate, the reader emits a series of radio frequency signals with different frequencies, and the resonant frequency is detected through amplitude mutation of echo signals, so that the current sensor temperature is obtained.
The reader is arranged at a switch of the breaker chamber, and the reader transmits an excitation signal and acquires an echo signal representing temperature information. Since the switch of the breaker chamber is small in size, the size of the reader needs to be reduced in cooperation with a miniaturized design. The reader comprises a signal processing and control module 1, a temperature compensation circuit module 2, a transmitter 3, a radio frequency switch 4 and a receiver 5 which are connected in sequence. The transmitter 3 and the receiver 5 are respectively connected with the wireless passive temperature sensor through the radio frequency switch 4.
The transmitter 3 is composed of a two-channel direct digital frequency synthesizer 31, a filter 32, a high-speed switch 33 and a transmission power amplifier 34 which are connected in series in sequence. The dual-channel direct digital frequency synthesizer 31 receives the control of the signal processing and control module 1, receives the excitation signal sent by the PLL frequency synthesizer 59, receives the feedback of the temperature compensation circuit module 2, and sends out the modulated 433MHz excitation signal, and the filter 32 is a 433MHz band-pass filter. The receiver 5 comprises a radio frequency front-end filter 51, a low noise amplifier 52, an isolator 53, an automatic gain controller 54, a first signal lamp 55, a first low pass filter 56, a second signal lamp 57, a second low pass filter 58 and a PLL frequency synthesizer 59. The radio frequency front end filter 51, the low noise amplifier 52, the isolating switch 53 and the automatic gain controller 54 are sequentially connected in series, the output end of the automatic gain controller 54 is respectively connected with a first signal lamp 55 and a second signal lamp 57, the first signal lamp 55 is respectively connected with a first low-pass filter 56 and a PLL frequency synthesizer 59, and the second signal lamp 57 is connected with a second low-pass filter 58. The first signal lamp 55 and the second signal lamp 57 display the working states of the first low-pass filter 56 and the second low-pass filter 58, and the first signal lamp 55 and the second signal lamp 57 output temperature information data to the signal processing and control module 1.
The reader is provided with an antenna occupying the largest space, the application of the antenna is reduced as much as possible by the design of the reader, the radio frequency antenna is optimized, the size of hardware can be obviously reduced by selecting an integrated radio frequency device and a receiver with smaller design volumes, and the reader is arranged at a switch.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (4)
1. The utility model provides a passive wireless temperature measuring device of circuit breaker contact, including setting up the wireless passive temperature sensor on the circuit breaker contact, and with the reading ware that wireless passive temperature sensor corresponds, its characterized in that:
the wireless passive temperature sensor is attached to the breaker contact through heat-conducting silica gel and comprises a PCB and an acoustic surface wave element packaged on the PCB through the heat-conducting silica gel, an interdigital transducer is engraved in the middle of the acoustic surface wave element, reflection gratings are engraved on two sides of the interdigital transducer, and the interdigital transducer is externally connected with the reader through an antenna;
the reader is arranged at a switch of the breaker chamber, and transmits an excitation signal and acquires an echo signal representing temperature information; the reader comprises a signal processing and control module, a temperature compensation circuit module, a transmitter, a radio frequency switch and a receiver which are sequentially connected.
2. The passive wireless temperature measurement device for the contact of the circuit breaker according to claim 1, wherein the PCB is made of a heat-conducting ceramic.
3. The passive wireless temperature measurement device for the contact of the circuit breaker according to claim 1, wherein the transmitter comprises a two-channel direct digital frequency synthesizer, a filter, a high-speed switch and a transmission power amplifier which are sequentially connected in series.
4. The passive wireless temperature measuring device of the contact of the circuit breaker according to claim 1, wherein the receiver comprises a radio frequency front end filter, a low noise amplifier, a disconnecting switch, an automatic gain controller, a first signal lamp, a first low pass filter, a second signal lamp, a second low pass filter and a PLL frequency synthesizer, the radio frequency front end filter, the low noise amplifier, the disconnecting switch and the automatic gain controller are sequentially connected in series, an output end of the automatic gain controller is respectively connected with the first signal lamp and the second signal lamp, the first signal lamp is respectively connected with the first low pass filter and the PLL frequency synthesizer, and the second signal lamp is connected with the second low pass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073720.6A CN111141410A (en) | 2020-01-22 | 2020-01-22 | Passive wireless temperature measuring device of circuit breaker contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073720.6A CN111141410A (en) | 2020-01-22 | 2020-01-22 | Passive wireless temperature measuring device of circuit breaker contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111141410A true CN111141410A (en) | 2020-05-12 |
Family
ID=70526872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010073720.6A Pending CN111141410A (en) | 2020-01-22 | 2020-01-22 | Passive wireless temperature measuring device of circuit breaker contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111141410A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112468165A (en) * | 2020-11-25 | 2021-03-09 | 青岛理工大学 | Wireless passive high-voltage power grid temperature measurement system and method |
| CN112924821A (en) * | 2021-01-25 | 2021-06-08 | 广东电网有限责任公司广州供电局 | Composite detection system and method for electric power equipment discharge and heating defect detection |
| CN113155306A (en) * | 2021-01-18 | 2021-07-23 | 国网吉林省电力有限公司长春供电公司 | Built-in passive wireless temperature sensor for high-voltage power cable connector |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030164713A1 (en) * | 2000-03-06 | 2003-09-04 | Siemens Aktiengesellschaft | Product having a sensor and a surface acoustic wave element, as well as a method and arrangement for determining a measurement variable, which corresponds to a reactance, by a sensor |
| CN102435344A (en) * | 2011-10-10 | 2012-05-02 | 北京中讯四方科技股份有限公司 | Surface acoustic wave temperature sensor |
| CN202903366U (en) * | 2012-12-03 | 2013-04-24 | 德清县供电局 | Passive wireless temperature sensor used for high-voltage environment |
| CN204165670U (en) * | 2014-11-20 | 2015-02-18 | 国家电网公司 | A kind of SAW Temperature Sensors for outdoor high voltage environment |
| 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 |
| CN106643873A (en) * | 2016-11-08 | 2017-05-10 | 国网辽宁省电力有限公司电力科学研究院 | Partial discharge and temperature composite detection system and method |
-
2020
- 2020-01-22 CN CN202010073720.6A patent/CN111141410A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030164713A1 (en) * | 2000-03-06 | 2003-09-04 | Siemens Aktiengesellschaft | Product having a sensor and a surface acoustic wave element, as well as a method and arrangement for determining a measurement variable, which corresponds to a reactance, by a sensor |
| CN102435344A (en) * | 2011-10-10 | 2012-05-02 | 北京中讯四方科技股份有限公司 | Surface acoustic wave temperature sensor |
| CN202903366U (en) * | 2012-12-03 | 2013-04-24 | 德清县供电局 | Passive wireless temperature sensor used for high-voltage environment |
| CN204165670U (en) * | 2014-11-20 | 2015-02-18 | 国家电网公司 | A kind of SAW Temperature Sensors for outdoor high voltage environment |
| 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 |
| CN106643873A (en) * | 2016-11-08 | 2017-05-10 | 国网辽宁省电力有限公司电力科学研究院 | Partial discharge and temperature composite detection system and method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112468165A (en) * | 2020-11-25 | 2021-03-09 | 青岛理工大学 | Wireless passive high-voltage power grid temperature measurement system and method |
| CN112468165B (en) * | 2020-11-25 | 2022-05-03 | 青岛理工大学 | A wireless passive high-voltage power grid temperature measurement system and method |
| CN113155306A (en) * | 2021-01-18 | 2021-07-23 | 国网吉林省电力有限公司长春供电公司 | Built-in passive wireless temperature sensor for high-voltage power cable connector |
| CN113155306B (en) * | 2021-01-18 | 2023-11-10 | 国网吉林省电力有限公司长春供电公司 | Built-in passive wireless temperature-sensing sensor of high-voltage power cable joint |
| CN112924821A (en) * | 2021-01-25 | 2021-06-08 | 广东电网有限责任公司广州供电局 | Composite detection system and method for electric power equipment discharge and heating defect detection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111141410A (en) | Passive wireless temperature measuring device of circuit breaker contact | |
| US8930160B2 (en) | Measurement system for the wireless position-independent measurement of the temperature | |
| CN103630233A (en) | Acceleration sensor-based system and acceleration sensor-based method for monitoring vibration of circuit breaker | |
| CN104990638B (en) | A kind of chip based on radio temperature sensor | |
| CN203672515U (en) | Passive wireless type on-line temperature measurement system | |
| TWI436620B (en) | Portable electronic device and control method of the same | |
| KR101844806B1 (en) | wireless temperature measurement device using surface acoustic wave device | |
| CN109632146B (en) | Power equipment temperature monitoring system and wireless temperature sensor | |
| CN104483036A (en) | Passive and wireless temperature tour-inspection device for equipment in distribution network and implementation method for passive and wireless temperature tour-inspection device | |
| CN105890661A (en) | Multi-physical-parameter sensor based on multi-channel surface acoustic wave | |
| CN110736563A (en) | Passive wireless temperature sensor suitable for distribution temperature monitoring early warning system | |
| CN102879700B (en) | High voltage isolator closes a floodgate the acoustic surface wave detection device and method that put in place | |
| CN112468165B (en) | A wireless passive high-voltage power grid temperature measurement system and method | |
| CN107884091A (en) | Wireless passive sonic surface wave monitoring device of switch cabinet temperature | |
| CN107192473B (en) | Surface acoustic wave temperature detection system and detection method based on phased array antenna | |
| CN203616002U (en) | A circuit breaker vibration monitoring system based on an acceleration sensor | |
| CN202887225U (en) | Reader-writer of acoustic surface wave wireless passive sensor system | |
| CN104406710A (en) | SAW (Surface Acoustic Wave)-technology-based online monitoring system and monitoring method for running temperature of isolation switch in GIS | |
| CN215871190U (en) | Power supply control circuit and socket | |
| CN103761855B (en) | A kind of based on power carrier communication contact bounce and opening time test macro | |
| CN113155307B (en) | Built-in temperature online monitoring system for high-voltage power cable joints | |
| CN205843841U (en) | Switch cubicle long distance temperature measurement system | |
| CN111024342B (en) | Power equipment vibration detection system in high-temperature environment and detection method thereof | |
| Wang et al. | Design and application of high precision differential SAW sensor | |
| CN107782476B (en) | Self-priming power test system and method of MEMS switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200512 |