CN202230596U - Wireless network monitoring device for state of high-voltage cable connector in mines - Google Patents
Wireless network monitoring device for state of high-voltage cable connector in mines Download PDFInfo
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- CN202230596U CN202230596U CN2011202905683U CN201120290568U CN202230596U CN 202230596 U CN202230596 U CN 202230596U CN 2011202905683 U CN2011202905683 U CN 2011202905683U CN 201120290568 U CN201120290568 U CN 201120290568U CN 202230596 U CN202230596 U CN 202230596U
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Abstract
The utility model relates to a wireless network monitoring device for the state of a high-voltage cable connector in mines. The wireless network monitoring device consists of a plurality of terminal nodes, a plurality of wireless routes and a monitoring center, wherein each terminal node comprises a microprocessor unit, a data acquisition unit, a clock unit, a data storage unit, a power supply and a wireless terminal; each wireless route comprises a wireless router and a power supply; the monitoring center comprises a microprocessor unit, a clock unit, a data storage unit, a display alarm unit, a power supply, a wireless coordinator and a RS485 communication end port; and the wireless terminals of the terminal nodes, the wireless routers of the wireless routes and the wireless coordinator of the monitor center are wireless communication modules XBeePRO with Ad hoc function in the DIGI Company based on Zigbee technology. The wireless network monitoring device is mainly used for solving the shortages of data wired transmission and the nRF series communication module in real-time temperature monitoring system of the existing high-voltage cable connector in the mines and realizing the remote monitoring for the state of the cable connector in the whole mines.
Description
Technical field
The utility model relates to the cable splice state monitoring apparatus, particularly a kind of wireless network monitoring device that is used for the mine high voltage cable connector status.
Background technology
Along with deepening continuously of large-scale coal mine manufacturing schedule; The down-hole high pressure supply network is huge all the more; The cable splice number increases; High-tension cable coupling arrangement (be commonly called as anti-explosion terminal box, be specifically designed to high-tension cable under the connection well) receives temperature, humidity, band to carry the influence of situation and manufacture craft, and explosion accident frequently takes place.Therefore the health monitoring of high-voltage cable joint becomes colliery industry unavoidable major issue in the evolution of highly effective and safe direction.
At present with coal mine under high voltage cable connector status monitor relevant document and have people such as the Ren Yan of North China Electric Power University to be published in " electrical applications " 2005 the 12nd phases to be entitled as " mine high voltage power transmission temperature of cable junction tour gauging system "; Temperature of cable junction is regularly collected through vehicular or hand-held temperature polling instrument by this system; System real time is poor, can't in time report to the police to catastrophic failure.China Mining University appoints the Hui Hesun flat professor that continues to deliver in " coal science and technology " 2006 the 12nd phases and be entitled as " research of mine cable on-line temperature monitoring method " literary composition; The connector temperature on-line monitoring system that a kind of microprocessor technology and bus type digital temperature sensor technology combine has been proposed; Monitor temperature changes in real time; But system does not monitor humidity in cable current and the terminal box, the status information in the time of yet just can't comprehensively grasping the fault generation.For this reason, the Song Jiancheng of Institutes Of Technology Of Taiyuan professor and Qi Jianwei etc. are that the patent of invention of CN101614597 " a kind of monitoring device that is used for high voltage cable connector status in mine roadway " has proposed a kind of cable splice state on_line monitoring device based on many reference amounts at publication number.Above-mentioned two kinds of on-Line Monitor Device all adopt the distributed networked structure; Since under the coal mine cable splice have distribute wide, quantity is many, big characteristics of randomness apart; Need at tens of these monitoring devices of roadway arrangement; Each monitoring device is communicated by letter with master station with Monitor Sub-Station of Less through the RS485 port, and there is track laying inconvenience in this data wire transmission mode, economy is not high, communication line is fragile and to borehole operation problem such as make troubles.
Radio communication has that networking is fast, favorable expandability, data transmission are reliable, be easy to the advantage that realizes many data of monitoring point centralized management, simplify monitoring equipment; People such as the Wen Xinling of Management Colleges Of Aircraft Industry Of Zhengzhou are published in the borehole cable connector temperature online monitoring system that has proposed in the literary composition that " coal science and technology " 2008 the 6th phases are entitled as " colliery high-voltage cable joint real time temperature Design of Monitoring and Control System " based on nRF series wireless transport module; But this wireless communication module does not have the MANET function; Its networking and route all will realize through software programming, and be more loaded down with trivial details, if increase detection node; Then must on software and hardware, all do bigger change; And be single-hop systems basically based on the system of this wireless module, transmission range is near, for arranging net and System Expansion brings many problems.In addition, the nRF series module does not have the Remote configuration function yet.
Therefore; For guaranteeing mine power supply safety; The deficiency that the wireless network monitoring device that press for design a kind of low in energy consumption, long transmission distance, convenient configuration, has a fully connected topology of MANET function solves present data wire transmission and nRF series radio communication device realizes uniform data processing, early warning and the management of full borehole cable connector status.
The utility model content
The purpose of the utility model is to provide a kind of wireless network monitoring device that is used for the mine high voltage cable connector status; Mainly the deficiency of data wire transmission and nRF series communication module in the high-voltage cable joint real time temperature supervisory system of the existing colliery of solution realizes the remote monitoring of full borehole cable connector status.
For realizing above-mentioned purpose, the utility model is to realize like this.
A kind of wireless network monitoring device that is used for the mine high voltage cable connector status, it is made up of some terminal nodes, some wireless routes and a Surveillance center; It is characterized in that: each terminal node comprises microprocessor unit, data acquisition unit, clock unit, data storage cell, power supply and wireless terminal; Each wireless route comprises wireless router and power supply; Surveillance center comprises microprocessor unit, clock unit, data storage cell, display alarm unit, power supply, wireless telegon and RS485 COM1; The wireless telegon of the wireless terminal of described terminal node, the wireless router of wireless route and Surveillance center is DIGI company has the MANET function based on the Zigbee technology wireless communication module XBee PRO.
The described wireless network monitoring device that is used for the mine high voltage cable connector status is characterized in that: the microprocessor unit of described terminal node and Surveillance center is 16 high-performance low-power-consumption single-chip microcomputer MSP430F149 of TI company; The data line of described wireless communication module XBee PRO links to each other with P3.4, the P3.5 of microprocessor unit separately, and P2.0, P2.1, P2.2's sleep control line of microprocessor unit link to each other respectively with separately with the data flow con-trol line.
The described wireless network monitoring device that is used for the mine high voltage cable connector status is characterized in that: the RSSI pin of described wireless communication module XBee PRO is received three inverting input INA-, INB-and the INC-pin of voltage comparable chip through resistance R 8; Three positive input terminal INA+, INB+ and the INC+ pin of voltage comparable chip is connected on respectively between divider resistance R7 and R6, R6 and R5, R5 and the R4; Three output terminal OUTA, OUTB and OUTC link to each other with the negative electrode of light emitting diode LED3, LED2 and LED1 respectively, and three light emitting diodes are total to anode through resistance R 1, R2 and R3 respectively and meet power supply VCC.
The described wireless network monitoring device that is used for the mine high voltage cable connector status is characterized in that: the microprocessor unit of described Surveillance center connects host computer through the RS485 COM1.
The utility model is by advantage and the good effect that technique scheme had: XBee PRO wireless communication module can freely form various topological structure networks flexibly; And can change its topological structure at any time; Can not influence data communication, not need the additional software programming yet; After module powers on, seek the node in the network automatically by the wireless telegon that XBee PRO configuration forms, and automatic distribution network address, data transmission is selected route automatically, does not need manual operation and programming; XBee PRO module can be sent remote command through host computer, controls the data collection cycle of each terminal node, and sleep is provided with and data flow con-trol, guarantees that the low power operation and the data of module are effectively transmitted.The utility model is simple in structure; Distributed monitoring installation cost more originally is low, Installation and Debugging are convenient, system power dissipation is low, antijamming capability is strong, data transmission is reliable and stable, expanding function is strong, increase or minimizing monitoring node software alteration few, can conveniently monitor the real-time running state of full borehole cable joint.
Description of drawings
Fig. 1 is the system architecture diagram of the utility model;
Fig. 2 is the wireless communication unit of the utility model and the connection layout of microprocessor unit.
Fig. 3 is the strong and weak indicating circuit schematic diagram of the wireless signal of the utility model.
Fig. 4 is the wireless data transmission process flow diagram of the utility model
Fig. 5 is the communication module Remote configuration process flow diagram of the utility model.
Embodiment
See also Fig. 1, the utility model discloses a kind of wireless network monitoring device that is used for the mine high voltage cable connector status, it is made up of some terminal node 1, some wireless routes 2 and a Surveillance center 3; Each terminal node 1 comprises microprocessor unit 11, data acquisition unit 12 (as: temperature, electric current, humidity data collecting unit), clock unit 13, data storage cell 14, power supply 15 and wireless terminal 16; Route 2 that each is wireless comprises wireless router 21 and power supply 22; Surveillance center 3 comprises microprocessor unit 31, clock unit 32, data storage cell 33, display alarm unit 34, power supply 35, wireless telegon 36 and RS485 COM1; The microprocessor unit 31 of described Surveillance center 3 connects host computer 4 through the RS485 COM1.
The microprocessor unit 11,31 (U1) of terminal node 1 and Surveillance center 3 is 16 high-performance low-power-consumption single-chip microcomputer MSP430F149 of TI company in the utility model, is responsible for the execution of data acquisition, storage, processing and radio communication order.The concrete analysis of other unit is the existing explanation of patent of invention of CN101614597 " a kind of monitoring device that is used for high voltage cable connector status in mine roadway " at publication number, repeats no more here.The principal feature of the utility model is in the distributed monitoring device, to have increased wireless communication unit and radio transmitting method.
The wireless communication unit of the utility model is divided into wireless terminal, wireless router, three kinds of forms of wireless telegon; The communication module XBee PRO (U2) that its control core has all adopted DIGI company to have the MANET function based on the Zigbee technology; And becoming different shape through the X_CTU software arrangements, it is still effective to power on once more after the dead electricity.When wireless communication module U2 serves as wireless terminal 16 and wireless telegon 36; As shown in Figure 2, its data line links to each other with P3.4, the P3.5 of microprocessor unit U1 separately, and P2.0, P2.1, P2.2's sleep control line of microprocessor unit U1 link to each other respectively with separately with the data flow con-trol line; Main effect is that sampled data is sent to wireless telegon from wireless terminal; Also receive the Remote configuration data that wireless telegon transmits, if distance is far away, then automatically through wireless router 21 redirects.Fig. 3 is the strong and weak indicating circuit of wireless signal; The RSSI pin of wireless module is received INA-, INB-and the INC-pin of voltage comparable chip U3 through resistance R 8; The INA+ of voltage comparable chip, INB+ and INC+ pin are connected on respectively between resistance R 7 and R6, R6 and R5, R5 and the R4; OUTA, OUTB and OUTC link to each other with the negative electrode of light emitting diode LED3, LED2 and LED1 respectively, and three light emitting diodes are total to anode through resistance R 1, R2 and R3 respectively and meet power supply VCC.In wireless communication procedure, if signal intensity is fine, then three LED are all luminous; If signal is general, then LED2 and LED3 are luminous; If signal a little less than, then only have LED3 luminous; If there is not signal, then three LED are all not luminous.
Described radio transmitting method control comprises wireless data transmission and communication module Remote configuration, and data transmission adopts the API form.
Wireless data transmission is the microprocessor that the temperature of terminal node cable splice, electric current, humidity detection value is sent to Surveillance center place, is carried out data processing, early warning and is uploaded to host computer through the RS485 COM1 by the microprocessor unification of Surveillance center.Operating process such as Fig. 4, specific as follows:
(1) system initialization: microprocessor unit U1 is by the clock unit timing; To a certain moment; Send the sleep pin of a level signal through P2.0, activate wireless terminal, accomplish initialization simultaneously the data collecting unit to be ready for sending data to wireless terminal U2.
(2) data acquisition: microprocessor is through the log-on data capture program, and the temperature humidity of detection streamer joint and current data after the A/D conversion, form the sexadecimal valid data.
(3) generate Frame: microprocessor generates Frame according to the data layout of XBee module radio communication, and Frame has comprised information such as the length, frame identifier, destination address, data content, check code of data.For example; From the address be the wireless terminal of 00 13 A2,00 40 69 58 5D to transmit data 0x45 be 00 13 A2,00 40 69 58 60 wireless telegons to the address, then in microprocessor, should generate following hexadecimal data frame: 7E 00 0F 10 01 00 13 A2 00 40 69 58 60 FF FE 00 00 45 97.Each data implication is following successively in this Frame:
The 7E frame head; 00 0F data length; 10 frame types; 01 frame ID; 00 13 A2,00 40 69 58 60 destination addresses are 64 bit address of wireless telegon here; The network address of FF FE telegon; 00 broadcasting radius; 00 recommendation items; 45 data contents; 97 check codes.
(4) data are sent: microprocessor sends above Frame to wireless terminal through serial ports UART0:P3.4, P3.5; Wireless terminal can be sought route after receiving data automatically; Distance with the shortest path data sent out, if then can directly be sent to wireless telegon with Frame in communication range; If distance is far away, then need data be sent to wireless telegon through the wireless router transfer.
(5) Data Receiving: Frame sends from wireless terminal, and wireless telegon can receive following Frame: 7E 00 0D 90 00 13 A2 00 40 69 58 5D 00 00 01 45 15.Each data implication is following successively in this Frame:
The 7E frame head; 00 0D data length; 90 receiving flags; 00 13 A2,00 40 69 58 5D source addresses are 64 bit address of wireless terminal here; 00 broadcasting radius; 00 recommendation items; 01 accepting state, 01 expression receives successfully; 45 data contents; 13 check codes.
Can find out that through this Frame wireless telegon has successfully received the data 0x45 from wireless terminal, and can see information such as data length, source address.
(6) data processing: wireless telegon is sent to the microprocessor unit at Surveillance center place with Frame, and microprocessor can be stored data after treatment, demonstration, off-limit alarm, and data is sent to the host computer on ground through the RS485 port.
After telegon received data and finishes, feedback information from telegon can be received to show data receiving state by the wireless terminal place, if receives successfully, wireless terminal gets into sleep state, wait data transmission next time after through one section time-delay automatically; If take defeat, wireless terminal can carry out data re-transmitting automatically.If the data volume at wireless terminal place surpasses certain value; For avoiding data congestion; Then its data flow con-trol pin can be to P2.1, the P2.2 transmission level signal of microprocessor, and stops to receive the data from microprocessor, can receive the data from microprocessor once more behind the pending data relieve congestion.The wireless telegon at Surveillance center place also is same control method.This process has promptly been accomplished a wireless data and has been transmitted.
The communication module Remote configuration is through upper computer software wireless terminal to be configured; Remote configuration can change working method, sleep pattern, the node ID of wireless terminal and obtain various information of wireless terminal etc.; Be convenient to the management of wireless terminal, improve the dirigibility of monitoring network.At this, be that example is explained with the node ID of configuration of wireless terminal, configuration flow such as Fig. 5, concrete steps are following:
(1) software set: open the configuration software in the host computer, select the address of API remote command pattern and object module, selecting the address here is that the wireless terminal of 00 13 A2,00 40 69 58 5D is a destination address.
(2) input command: input NI (command code of node ID) on the software command hurdle; The input EF (the node ID code that resets) on the parameter hurdle, then software generates following Frame: 7E 00 11 17 01 00 13 A2 00 40 69 58 5D FF FE 00 4E 49 45 46 B5 automatically.Each data implication is following successively in this Frame.
The 7E frame head; 00 11 data lengths; 17 remote command request marks; 01 frame ID; 00 13 A2,00 40 69 58 5D destination addresses; The network address of the wireless telegon of FF FE; 00 recommendation items; The sexadecimal ASCLL sign indicating number that 4E 49 configuration order NI are corresponding; The sexadecimal ASCLL sign indicating number that 45 46 configuration parameter EF are corresponding; The B5 check code.
(3) order data sends: after in configuration software, configuring order and parameter; Click and send the microprocessor that can the mentioned order Frame that generate automatically be sent to Surveillance center, microprocessor is sought route automatically through wireless telegon Frame is delivered to object module.
(4) receive order data: in wireless terminal, have only the destination address of appointment in the order data frame just can receive order data.
(5) command recognition: receive the automatic recognition data of wireless terminal of order data and accomplish self configuration according to data content.
(6) information feedback: wireless terminal can feedback configuration information be given wireless telegon after accomplishing configuration, so that status poll.At this moment, the following feedback data frame that can receive of wireless telegon: 7E 00 0F 97 01 00 13 A2 00 40 69 58 5D 05 4F 4E 49 00 69.Each data implication is following successively in this Frame.
The 7E frame head; 00 0F data length; 97 remote commands receive sign; 01 frame ID; 00 13 A2,00 40 69 58 5D source addresses; The network address of FF FE wireless terminal; The sexadecimal ASCLL sign indicating number that 4E 49 configuration order NI are corresponding; 00 configuration status position, 00 shows the configuration completion; 69 check codes.
Through finding out that from the wireless terminal feedback information Remote configuration is accomplished,, then must, upper computer software reconfigure after refreshing by above step if configuration is not accomplished.Otherwise Remote configuration is all similar with said process.
Being merely the preferred embodiment of the utility model in sum, is not the practical range that is used for limiting the utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should be the technological category of the utility model.
Claims (4)
1. wireless network monitoring device that is used for the mine high voltage cable connector status, it is made up of some terminal nodes (1), some wireless routes (2) and a Surveillance center (3); It is characterized in that: each terminal node (1) comprises microprocessor unit (11), data acquisition unit (12), clock unit (13), data storage cell (14), power supply (15) and wireless terminal (16); Each wireless route (2) comprises wireless router (21) and power supply (22); Surveillance center (3) comprises microprocessor unit (31), clock unit (32), data storage cell (33), display alarm unit (34), power supply (35), wireless telegon (36) and RS485 COM1; The wireless router (21) of the wireless terminal (16) of described terminal node (1), wireless route (2) and the wireless telegon (36) of Surveillance center (3) are DIGI company has the MANET function based on the Zigbee technology wireless communication module XBee PRO.
2. the wireless network monitoring device that is used for the mine high voltage cable connector status according to claim 1 is characterized in that: the microprocessor unit (11,31) of described terminal node (1) and Surveillance center (3) is 16 high-performance low-power-consumption single-chip microcomputer MSP430F149 of TI company; The data line of described wireless communication module XBee PRO links to each other with P3.4, the P3.5 of microprocessor unit (11,31) separately, and P2.0, P2.1, P2.2's sleep control line of microprocessor unit (11,31) link to each other respectively with separately with the data flow con-trol line.
3. the wireless network monitoring device that is used for the mine high voltage cable connector status according to claim 2 is characterized in that: the RSSI pin of described wireless communication module XBee PRO is received three inverting input INA-, INB-and the INC-pin of voltage comparable chip through resistance R 8; Three positive input terminal INA+, INB+ and the INC+ pin of voltage comparable chip is connected on respectively between divider resistance R7 and R6, R6 and R5, R5 and the R4; Three output terminal OUTA, OUTB and OUTC link to each other with the negative electrode of light emitting diode LED3, LED2 and LED1 respectively, and three light emitting diodes are total to anode through resistance R 1, R2 and R3 respectively and meet power supply VCC.
4. according to claim 1 or the 2 or 3 described wireless network monitoring devices that are used for the mine high voltage cable connector status, it is characterized in that: the microprocessor unit (31) of described Surveillance center (3) connects host computer (4) through the RS485 COM1.
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| CN2011202905683U CN202230596U (en) | 2011-08-11 | 2011-08-11 | Wireless network monitoring device for state of high-voltage cable connector in mines |
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| CN2011202905683U CN202230596U (en) | 2011-08-11 | 2011-08-11 | Wireless network monitoring device for state of high-voltage cable connector in mines |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818593A (en) * | 2012-08-14 | 2012-12-12 | 苏州左海电气有限公司 | Power cable intermediate head online monitoring data centralizing and transmitting device |
| CN102841047A (en) * | 2012-08-31 | 2012-12-26 | 深圳市华星光电技术有限公司 | Cleanness monitoring system and cassette |
| CN103007465A (en) * | 2012-12-04 | 2013-04-03 | 威海北洋电气集团股份有限公司 | High-voltage cable joint comprehensive monitoring and fire protection device and application thereof |
| CN103136911A (en) * | 2013-01-25 | 2013-06-05 | 北京硕人时代科技有限公司 | Low-power dissipation on-line collecting system and collecting method based on backup redundant data |
| CN103196494A (en) * | 2013-03-29 | 2013-07-10 | 太原理工大学 | Embedded type self-powered wireless sensing system for highway health monitoring |
| CN103308955A (en) * | 2013-07-09 | 2013-09-18 | 中国海洋石油总公司 | Wireless monitoring device and method of laying state of underwater umbilical cables |
| CN103644938A (en) * | 2013-12-03 | 2014-03-19 | 大连大学 | Fault early-warning system |
| CN104101381A (en) * | 2014-07-22 | 2014-10-15 | 安徽鑫辰电气设备有限公司 | Online monitoring system of mining high voltage distribution device |
| CN105539204A (en) * | 2016-01-26 | 2016-05-04 | 王旭 | Intelligent high-speed electrified-railway contact network system |
| CN106291223A (en) * | 2016-08-11 | 2017-01-04 | 国网新疆电力公司信息通信公司 | A kind of communication cable security maintenance service system |
| CN106646131A (en) * | 2016-12-15 | 2017-05-10 | 中山市得高行知识产权中心（有限合伙） | Intelligent network data transmission cable detection and maintenance system |
| CN104660335B (en) * | 2015-03-05 | 2017-11-07 | 天津华宁电子有限公司 | A kind of mining communication pulling force optical cable Quick Connect Kit with radio transmission-receiving function |
| CN107907157A (en) * | 2017-10-10 | 2018-04-13 | 国网浙江宁波市奉化区供电公司 | Remote temperature monitoring device for electric power wire terminal |
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2011
- 2011-08-11 CN CN2011202905683U patent/CN202230596U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818593A (en) * | 2012-08-14 | 2012-12-12 | 苏州左海电气有限公司 | Power cable intermediate head online monitoring data centralizing and transmitting device |
| CN102841047A (en) * | 2012-08-31 | 2012-12-26 | 深圳市华星光电技术有限公司 | Cleanness monitoring system and cassette |
| CN102841047B (en) * | 2012-08-31 | 2015-07-01 | 深圳市华星光电技术有限公司 | Cleanness monitoring system and cassette |
| CN103007465A (en) * | 2012-12-04 | 2013-04-03 | 威海北洋电气集团股份有限公司 | High-voltage cable joint comprehensive monitoring and fire protection device and application thereof |
| CN103007465B (en) * | 2012-12-04 | 2016-06-01 | 威海北洋电气集团股份有限公司 | High-voltage cable joint comprehensively monitoring and fire protection system are applied with it |
| CN103136911B (en) * | 2013-01-25 | 2015-01-07 | 北京硕人时代科技股份有限公司 | Low-power dissipation on-line collecting system and collecting method based on backup redundant data |
| CN103136911A (en) * | 2013-01-25 | 2013-06-05 | 北京硕人时代科技有限公司 | Low-power dissipation on-line collecting system and collecting method based on backup redundant data |
| CN103196494A (en) * | 2013-03-29 | 2013-07-10 | 太原理工大学 | Embedded type self-powered wireless sensing system for highway health monitoring |
| CN103308955A (en) * | 2013-07-09 | 2013-09-18 | 中国海洋石油总公司 | Wireless monitoring device and method of laying state of underwater umbilical cables |
| CN103308955B (en) * | 2013-07-09 | 2016-05-25 | 中国海洋石油总公司 | Umbilical cables is laid state wireless monitoring device under water |
| CN103644938A (en) * | 2013-12-03 | 2014-03-19 | 大连大学 | Fault early-warning system |
| CN104101381A (en) * | 2014-07-22 | 2014-10-15 | 安徽鑫辰电气设备有限公司 | Online monitoring system of mining high voltage distribution device |
| CN104660335B (en) * | 2015-03-05 | 2017-11-07 | 天津华宁电子有限公司 | A kind of mining communication pulling force optical cable Quick Connect Kit with radio transmission-receiving function |
| CN105539204A (en) * | 2016-01-26 | 2016-05-04 | 王旭 | Intelligent high-speed electrified-railway contact network system |
| CN106291223A (en) * | 2016-08-11 | 2017-01-04 | 国网新疆电力公司信息通信公司 | A kind of communication cable security maintenance service system |
| CN106646131A (en) * | 2016-12-15 | 2017-05-10 | 中山市得高行知识产权中心（有限合伙） | Intelligent network data transmission cable detection and maintenance system |
| CN107907157A (en) * | 2017-10-10 | 2018-04-13 | 国网浙江宁波市奉化区供电公司 | Remote temperature monitoring device for electric power wire terminal |
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