CN111141409A - Transmission line cable temperature monitoring device - Google Patents
Transmission line cable temperature monitoring device Download PDFInfo
- Publication number
- CN111141409A CN111141409A CN202010073713.6A CN202010073713A CN111141409A CN 111141409 A CN111141409 A CN 111141409A CN 202010073713 A CN202010073713 A CN 202010073713A CN 111141409 A CN111141409 A CN 111141409A
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- CN
- China
- Prior art keywords
- pcb
- acoustic wave
- wave element
- surface acoustic
- cable
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- 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
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- 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]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- 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
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- 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
The invention discloses a power transmission line cable temperature monitoring device which comprises a passive wireless sensor and a reader, wherein the wireless passive temperature sensor is arranged in a packaging box and comprises a PCB (printed circuit board) and a surface acoustic wave element, the upper surface of the surface acoustic wave element is flush with the open surface of the packaging box, and the packaging box is bound on the outer side of a cable through a polyvinyl chloride lantern ring so that the surface acoustic wave element is tightly attached to the outer side surface of the cable; the PCB board connects out through receiving and dispatching antenna, receiving and dispatching antenna accesss to nearest neighbour's pole and arranges along the pole, is equipped with the access in the bottom of pole receiving and dispatching antenna read the ware. The invention can realize on-line temperature monitoring and early warning for the cable.
Description
Technical Field
The invention relates to a power transmission line cable temperature monitoring device used in the field of power online monitoring.
Background
Among the various existing grid faults, a line fault should constitute a central grid fault. From the current state of the art, line faults as a whole exhibit a frequency and a diverse characterization, including diverse fault sources. Wherein, because the cable insulation is ageing or the obstacle appears in the circuit and leads to the local resistance increase of cable, the temperature rise will lead to the cable to take place incident such as fire. Especially, due to the complexity of the transmission line, the conventional temperature monitoring means is difficult to realize, and if long-term online temperature monitoring and early warning are carried out on the transmission line, the overall stability and safety of a power grid can be threatened.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a power transmission line cable temperature monitoring device which can realize online temperature monitoring and early warning of cables.
One technical scheme for achieving the above purpose is as follows: a power transmission line cable temperature monitoring device comprises a passive wireless sensor and a reader;
the wireless passive temperature sensor is arranged in the packaging box and comprises a PCB (printed Circuit Board) and a surface acoustic wave element, the upper surface of the surface acoustic wave element is flush with the open surface of the packaging box, and the packaging box is bound on the outer side of the cable through a polyvinyl chloride lantern ring, so that the surface acoustic wave element is tightly attached to the surface of the outer side of the cable;
the PCB board connects out through receiving and dispatching antenna, receiving and dispatching antenna accesss to nearest neighbour's pole and arranges along the pole, is equipped with the access in the bottom of pole receiving and dispatching antenna read the ware.
Further, the PCB board adopts heat conduction ceramic or FR4 material.
Further, when the PCB is made of FR4 material, the side surfaces of the PCB and the contact bonding surface are coated with copper, and the PCB area at the bottom of the surface acoustic wave element is also coated with copper.
Furthermore, heat-conducting silicone grease is coated on the connecting surface of the surface acoustic wave element and the PCB.
According to the power transmission line cable temperature monitoring device, the wireless passive temperature sensor and the transceiving antenna thereof are bound on the cable, the transceiving antenna is connected to the reader fixed at the bottom of the electric pole along the cable, and the reader transmits the excitation signal and acquires the echo signal representing the temperature information. After installing wireless passive temperature sensor, need not change the cable junction mode, the cable overall dimension is unchangeable, can directly assemble on current cable conductor. The outer packaging material is made of polyvinyl chloride which is the same as the outer insulating material of the cable, so that the temperature sensor is attached to the packaging material which is connected with the cable into a whole, the temperature of the cable can be accurately measured, and meanwhile, the system can monitor the temperature change condition of the contact in time through measures of reducing thermal resistance.
Drawings
Fig. 1 is a schematic view of an installation structure of a transmission line cable temperature monitoring device on a cable according to the present invention;
fig. 2 is a schematic structural diagram of a wireless passive temperature sensor of the transmission line cable temperature monitoring device of the invention;
FIG. 3 is a schematic diagram of a surface acoustic wave element of the power transmission line cable temperature monitoring device of the present invention;
fig. 4 is a schematic diagram of a specific position of a reader of the power transmission line cable temperature monitoring device 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:
please refer to fig. 1-2. According to the transmission line cable temperature monitoring device, the wireless passive temperature sensor 1 is arranged in the packaging box, the wireless passive temperature sensor 1 comprises the PCB 4 and the surface acoustic wave element 3, and the upper surface of the surface acoustic wave element 3 is flush with the open surface of the packaging box. The packaging box is bound on the outer side of the cable through the polyvinyl chloride lantern ring 2, so that the surface acoustic wave element 3 is tightly attached to the surface of the outer side of the cable. The passive temperature sensor 1 receives radio frequency energy of an external reader through the transceiving antenna 5 and sends back a signal, and the polarization direction of the transceiving antenna 5 is over against the transceiving antenna of the reader.
The wireless passive temperature sensor 2 is made by adopting a surface acoustic wave technology, and comprises a PCB 4 and a surface acoustic wave element 3. The PCB 4 is made of heat conductive ceramic or FR4 material, and when FR4 material is used, copper is coated in a large area on the side where the PCB 4 and the contact are bonded, and copper is coated in the PCB region at the bottom of the surface acoustic wave element 3. The two copper-coated surfaces are connected through a plurality of metallized holes. And heat-conducting silicone grease is coated between the bottom of the surface acoustic wave element 3 and the PCB 4. The above measures are all for reducing the temperature difference between the surface acoustic wave element 3 and the cable to measure the accurate contact point temperature.
Referring to fig. 3, the surface acoustic wave element 3 is packaged with a piezoelectric substrate 8 on which an interdigital transducer 6 and a reflection grating 7 are printed. A radio frequency excitation signal sent by the reader 9 is captured by the interdigital transducer 6, generates surface acoustic waves in the piezoelectric substrate 8, is enhanced by the reflection grating 7, returns to the interdigital transducer 6, and is converted into a radio frequency echo signal through inverse piezoelectric effect and sent back. The wave speed of the surface acoustic wave is related to the temperature of the piezoelectric substrate, the wave speed determines the resonant frequency of the piezoelectric substrate 8, the reader 9 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. When a plurality of sensors exist, the sensors can be distinguished by changing the center frequency, adjusting the spacing of the reflecting grids, realizing coding by the width and the like.
Referring to fig. 4, the PCB 4 is connected out through the transceiving antenna 5, the transceiving antenna 5 leads to the nearest electric pole and is arranged along the electric pole, and the reader 9 connected into the transceiving antenna is arranged at the bottom of the electric pole. The temperature data is uploaded after being summarized by the reader 9. The remote device evaluates the health condition of the line cable by comparing the actual current with the cable temperature rise data, and sends out an alarm signal when the temperature rise is found to be abnormal.
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 transmission line cable temperature monitoring device, includes passive wireless sensor and reader, its characterized in that:
the wireless passive temperature sensor is arranged in the packaging box and comprises a PCB (printed Circuit Board) and a surface acoustic wave element, the upper surface of the surface acoustic wave element is flush with the open surface of the packaging box, and the packaging box is bound on the outer side of the cable through a polyvinyl chloride lantern ring, so that the surface acoustic wave element is tightly attached to the surface of the outer side of the cable;
the PCB board connects out through receiving and dispatching antenna, receiving and dispatching antenna accesss to nearest neighbour's pole and arranges along the pole, is equipped with the access in the bottom of pole receiving and dispatching antenna read the ware.
2. The transmission line cable temperature monitoring device of claim 1, wherein the PCB is made of heat-conducting ceramic or FR4 material.
3. The transmission line cable temperature monitoring device of claim 2, wherein when the PCB is made of FR4 material, the side surface of the PCB bonded with the contact is coated with copper, and the PCB area at the bottom of the surface acoustic wave element is also coated with copper.
4. The transmission line cable temperature monitoring device of claim 1, wherein a connection surface of the surface acoustic wave element and the PCB is coated with a heat conductive silicone grease.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073713.6A CN111141409A (en) | 2020-01-22 | 2020-01-22 | Transmission line cable temperature monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073713.6A CN111141409A (en) | 2020-01-22 | 2020-01-22 | Transmission line cable temperature monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111141409A true CN111141409A (en) | 2020-05-12 |
Family
ID=70526845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010073713.6A Pending CN111141409A (en) | 2020-01-22 | 2020-01-22 | Transmission line cable temperature monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111141409A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117895219A (en) * | 2023-08-22 | 2024-04-16 | 南方电网数字电网研究院股份有限公司 | Data acquisition antenna applied to ring main unit wireless monitoring system and ring main unit |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4249418A (en) * | 1978-04-20 | 1981-02-10 | Tokyo Shibaura Denki Kabushiki Kaisha | Temperature detector using a surface acoustic wave device |
| US4399441A (en) * | 1980-01-25 | 1983-08-16 | Unisearch Limited | Apparatus for remote temperature reading |
| CN202903366U (en) * | 2012-12-03 | 2013-04-24 | 德清县供电局 | Passive wireless temperature sensor used for high-voltage environment |
| CN103557955A (en) * | 2013-10-19 | 2014-02-05 | 国家电网公司 | Passive wireless temperature sensor |
| CN203551138U (en) * | 2013-04-22 | 2014-04-16 | 江苏声立传感技术有限公司 | Surface acoustic wave wireless temperature sensor for measuring power switch cabinet static contact temperature |
| CN206099273U (en) * | 2016-10-21 | 2017-04-12 | 常州智梭传感科技有限公司 | Passive antenna temperature sensor and cable end cap structure |
| CN208270101U (en) * | 2018-05-22 | 2018-12-21 | 中研新材料股份有限公司 | Switchgear passive and wireless temp measuring system |
| CN209605975U (en) * | 2018-12-14 | 2019-11-08 | 广东电网有限责任公司 | A kind of reassembling type passive wireless temperature sensor |
-
2020
- 2020-01-22 CN CN202010073713.6A patent/CN111141409A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4249418A (en) * | 1978-04-20 | 1981-02-10 | Tokyo Shibaura Denki Kabushiki Kaisha | Temperature detector using a surface acoustic wave device |
| US4399441A (en) * | 1980-01-25 | 1983-08-16 | Unisearch Limited | Apparatus for remote temperature reading |
| CN202903366U (en) * | 2012-12-03 | 2013-04-24 | 德清县供电局 | Passive wireless temperature sensor used for high-voltage environment |
| CN203551138U (en) * | 2013-04-22 | 2014-04-16 | 江苏声立传感技术有限公司 | Surface acoustic wave wireless temperature sensor for measuring power switch cabinet static contact temperature |
| CN103557955A (en) * | 2013-10-19 | 2014-02-05 | 国家电网公司 | Passive wireless temperature sensor |
| CN206099273U (en) * | 2016-10-21 | 2017-04-12 | 常州智梭传感科技有限公司 | Passive antenna temperature sensor and cable end cap structure |
| CN208270101U (en) * | 2018-05-22 | 2018-12-21 | 中研新材料股份有限公司 | Switchgear passive and wireless temp measuring system |
| CN209605975U (en) * | 2018-12-14 | 2019-11-08 | 广东电网有限责任公司 | A kind of reassembling type passive wireless temperature sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117895219A (en) * | 2023-08-22 | 2024-04-16 | 南方电网数字电网研究院股份有限公司 | Data acquisition antenna applied to ring main unit wireless monitoring system and ring main unit |
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Application publication date: 20200512 |
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