CN203288058U - Extra-low power consumption transmit-receive descendant node type wireless temperature measuring device for high voltage switchgear - Google Patents

Extra-low power consumption transmit-receive descendant node type wireless temperature measuring device for high voltage switchgear Download PDF

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Publication number
CN203288058U
CN203288058U CN2013201157330U CN201320115733U CN203288058U CN 203288058 U CN203288058 U CN 203288058U CN 2013201157330 U CN2013201157330 U CN 2013201157330U CN 201320115733 U CN201320115733 U CN 201320115733U CN 203288058 U CN203288058 U CN 203288058U
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China
Prior art keywords
capacitor
control center
shell
chip
inductance
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Expired - Fee Related
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CN2013201157330U
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Chinese (zh)
Inventor
梁俊斌
邓雨荣
郭丽娟
邬蓉蓉
陶松梅
张炜
吕泽承
苏永立
王家枝
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SHANGHAI LINGBU TECHNOLOGY Co Ltd
Electric Power Research Institute of Guangxi Power Grid Co Ltd
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SHANGHAI LINGBU TECHNOLOGY Co Ltd
Electric Power Research Institute of Guangxi Power Grid Co Ltd
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Priority to CN2013201157330U priority Critical patent/CN203288058U/en
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Publication of CN203288058U publication Critical patent/CN203288058U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses an extra-low power consumption transmit-receive descendant node type wireless temperature measuring device for a high voltage switchgear. The device comprises a contact-type temperature sensor, a wireless transmit-receive chip, two AA batteries and a control center, wherein the control center adopts a singlechip MSP 430; the control center is in a sleep mode in normal times and enters into a working mode when the set time is up; during the working mode, the control center completes the functions of instruction receiving, temperature data reading, data transmitting-receiving, communication statute analysis, and the like; the contact-type temperature sensor completes a temperature conversion function; the wireless transmit-receive chip is a LTP5901-IPM, is based on a 6LoWAP protocol, has a communication frequency band of 2.4 G, completes the functions of wireless data transmitting-receiving, self-networking, automatic dormancy, automatic routing, automatic wakening and the like, and is extra-low in power consumption. Due to the adoption of the technical scheme, with two AA batteries, the normal working hours of the system are ensured to be longer than 80 months comparing with that the longest time of the current system is 24 months.

Description

A kind of extremely low power dissipation high-tension switch cabinet wireless temperature measurement transmitting-receiving child node device
Technical field
The invention belongs to intelligent grid on-line monitoring and application thereof, specifically a kind of extremely low power dissipation high-tension switch cabinet wireless temperature measurement transmitting-receiving child node device.
Background technology
High-tension switch cabinet is the visual plant in electric system, and the safe operation that guarantees high-tension switch cabinet is the important foundation that ensures power grid security.In the high-tension switch cabinet During Process of Long-term Operation, the positions such as the contact of disconnector and bus bar junction are because of aging or contact resistance is excessive generates heat, and the temperature of these heating positions usually causes the accidents such as equipment burnout.Conventional manual inspection mode can not in time be found the heating accident that switch cubicle is potential, more can't failure judgement development trend and location abort situation.For the deficiency of manual inspection, people have developed series of new high-tension switch cabinet device for detecting temperature, have overcome to a certain extent the weakness of manual inspection.
current, widely used temperature monitoring technology can be divided three classes: 1, outer infrared imagery technique (the Zhang Yan of cabinet, Tian Jing, Ye Fengchun, road is bright. based on the development [J] of the high-tension switch cabinet temperature real time monitoring network of infrared sensor. and High-Voltage Electrical Appliances, 2005 (2): 91-94. Li Shuan, Yuan Huijian, sun is bright, Jiang Yan. the realization [J] of two spectrum electrical equipment online supervision devices. computer measurement and control, 2011 (12): 2829-2901. Yuan Hui builds, sun is bright, Jiang Yan, Li Shuan. infrared pair of spectrum electrical Equipment On-Line Monitoring System of ultraviolet [J]. instrument and meter for automation, 2012 (2): 58 – 62. money Yi. based on the switch cabinet temperature on-line real time monitoring system [D] of infrared sensor. Nanjing: Institutes Of Technology Of Nanjing, 2009), 2, optical fiber Surface Mount thermometry (Zhu Jianjun, Zhao Baorui, record the youth, etc. the distributed fiberoptic sensor switch cabinet temperature monitor is inquired into [J]. optical device, 2012 (2): refined during 15-17.. and the application [J] of Fibre Optical Sensor in the high-tension apparatus In-Line Temperature Measure System. High-Voltage Technology, 2007,33 (8): 169-173. Li Liang, Xia Aijun, Lu cutting edge of a knife or a sword soldier. the advantage of fiber grating sensing technology and application [J]. optical communication technique, 2007,31 (7): 62-64), 3, contact temperature-measuring and Radio Transmission Technology (Chen Chengtian, the Cai Sheng town, Li Wangbiao, Wu Yunping. the design of high-tension switch cabinet real-time temperature test sytem and realization [J]. Fujian Normal University's journal, 2008, 24 (5), 49-52. Wang Kui English, Yu Yanwei. high-tension switch cabinet temperature online monitoring system design [J]. modern electronic technology, 2012, 35(15), 52-54. Song Liang, Wen Xiufeng. high-tension switch cabinet on-line temperature monitoring research [J]. electric switch, 2012 (3): 32-34. Lanxi County post, Li Haipeng, Yan Wenjing. based on the design [J] of the high-tension switch cabinet wireless temperature measurement system of ZigBee. Anhui University of Science and Technology's journal, 2011, 31 (1): 45-50).
The infrared imagery technique major defect is that present automaticity is not high, and order of accuarcy is limited, and cost is higher.The mode of optical fiber temperature-measurement application at present is more, but its supporting optical fiber sensing network analyser volume is larger, can't be installed on inside switch cabinet.In above-mentioned several thermometrys, the wireless temperature data transmission is general ZigBee or the GPRS of using at present, and these communications have the advantages such as simple and reliable, but major defect is that power consumption is too large for the on-line monitoring application.Open source information report shows, the best level of industry is: the working times the longest of two joint AA batteries or equivalent capacity battery are 24 months.Can cause so a large amount of transmission nodes to need the frequent battery of changing, be unfavorable for the daily servicing of system.
The utility model content
The purpose of this utility model is to provide a kind of simple in structure, reliable operation, high-tension switch cabinet wireless temperature measurement transmitting-receiving child node device that power consumption is extremely low.
The technical scheme that the utility model solves the problems of the technologies described above is as follows:
A kind of extremely low power dissipation high-tension switch cabinet wireless temperature measurement transmitting-receiving child node device, mainly by contact type temperature sensor, control center, two joint AA batteries, radio transmitting and receiving chip, signal cable, emitting antenna and shell, formed, the built-in control center of shell, two joint AA battery and radio transmitting and receiving chips, their annexation: control center is connected with the AA battery with radio transmitting and receiving chip respectively.
1. above-mentioned control center consists of low-power scm MSP430, adopt 8M Low Drift Temperature crystal oscillator as system clock or adopt 32.768k Low Drift Temperature crystal oscillator as real-time clock, control center is comprised of BNC connector, power input interface, amplifying circuit, filtering circuit, single-chip microcomputer, bus interface, control center's shell: the built-in amplifying circuit of control center's shell, filtering circuit and single-chip microcomputer; BNC connector and power input interface are arranged on respectively control center's shell one side, bus interface 26 is arranged on control center's shell another side, their annexation: BNC connector is connected with amplifying circuit one end, and the amplifying circuit other end is connected with single-chip microcomputer one end; Power input interface is connected with filtering circuit one end, and the filtering circuit other end is connected with single-chip microcomputer one end; The single-chip microcomputer other end is connected with bus interface;
1) filtering circuit 24 of described control center consists of the first inductance L 31, the second inductance L 32, the 3rd inductance L 33, the first capacitor C 31, the second capacitor C 32, the 3rd capacitor C 33, the 4th capacitor C 34: wherein, the node 2 of the first inductance L 31 and the node 1 of the second inductance L 32 are respectively by the first capacitor C 31, the second capacitor C 32 ground connection; The node 2 of the second inductance L 32 and the node 1 of the 3rd inductance L 33 are respectively by the 3rd capacitor C 33, the 4th capacitor C 34 ground connection;
2) described amplifying circuit consists of operational amplifier LMV358, the first resistance R 41, the second resistance R 42, the 3rd resistance R 43, the 4th resistance R 44 and capacitor C 41: wherein, the first resistance R 41 right-hand members are connected with the positive input node 5 of operational amplifier LMV358; The positive input node 5 of LMV358 is connected with the left end of the second resistance R 42; The right-hand member of the second resistance R 42 is connected to the output terminal node 7 of operational amplifier LMV358; The output terminal of LMV358 is connected to ground by the 4th resistance R 44; The reverse input end node 6 of LMV358 is by the 5th capacitor C 41 ground connection; The reverse input end node of LMV358 is by the 3rd resistance R 43 ground connection;
2. above-mentioned radio transmitting and receiving chip is that LTP5901-IPM is comprised of spi bus interface, wireless transmission chip, filtering circuit, antennal interface, radio transmitting and receiving chip shell: wherein, the built-in wireless transmission chip of radio transmitting and receiving chip shell, filtering circuit, the spi bus interface is arranged on radio transmitting and receiving chip shell one side, and antennal interface is arranged on radio transmitting and receiving chip shell another side; Spi bus interface, wireless transmission chip, filtering circuit, antennal interface are contacted successively:
Described filtering circuit consists of the 4th inductance L 61, the 5th inductance L 62, the 6th capacitor C 61, the 7th capacitor C 62 and the 8th capacitor C 63: wherein, the 4th inductance L 61 right-hand member nodes 2 and the 5th inductance L 62 left end nodes 1 are by the 6th capacitor C 61 ground connection; The node of the 7th inductance L 62 right-hand member nodes 2 and the 8th capacitor C 63 right-hand members is by the 7th capacitor C 62 ground connection;
Install the annexation of each parts:
The BNC connector of described control center is connected with the signal cable of temperature sensor; Power input interface is connected with the output interface of two joint AA batteries; Bus interface is connected with the bus interface of transceiving chip;
The spi bus interface of described transceiving chip is connected with the bus interface of control center; The antennal interface of described transceiving chip is connected with emitting antenna.
Above-mentioned transceiving chip is LTP5901-IPM, and all adopting precision with peripheral circuit resistance is per mille, and temperature coefficient is less than 5 * 10 -6/ ℃ High Precision Low Temperature float resistance; Electric capacity adopts all that electric capacity is stable, temperature range is wide, and temperature is floated little NOP capacitor.
Above-mentioned shell, control center's shell, radio transmitting and receiving chip shell all adopt epoxy resin insulation material, can tolerate and be not less than the 35kV high pressure.
Above-mentioned signal cable be 5MHz with interior decay less than the 0.15dB/m single core coaxial cable.
The utlity model has following advantage:
1. radio transmitting and receiving chip adopts LTP5901-IPM, and this chip is based on the 6LoWPAN agreement, and communications band is 2.4G.The LTP5901-IPM chip is completed reception, transmission, MANET, the auto sleep of wireless data and the function such as is automatically waken up, and has the extremely low power dissipation characteristics.
2. control module adopts single-chip microcomputer MSP430.Single-chip microcomputer MSP430 has two kinds of mode of operations, is respectively park mode and mode of operation.
3. the utility model is cheap, simple in structure, reliable and stable, power consumption is extremely low.Only use two joint AA batteries, just can guarantee system normal working hours, greater than 80 months, to greatly reduce the workload of each node maintenance of wireless temperature measuring device.Communication distance between each child node, reach as high as 2km, can effectively reduce route child node number, guaranteed simultaneously the reliability of system works.
Description of drawings
Fig. 1 is the structural representation of a kind of extremely low power dissipation high-tension switch cabinet of the utility model wireless temperature measurement transmitting-receiving child node device.
In figure, the shell 16 of contact type temperature sensor 11, control center 12, radio transmitting and receiving chip 13, emitting antenna 14, two joint AA batteries 15, extremely low power dissipation high-tension switch cabinet wireless temperature measurement transmitting-receiving child node device.
Fig. 2 is a kind of extremely low power dissipation high-tension switch cabinet of the utility model wireless temperature measurement transmitting-receiving child node device control center structural representation.
In figure, the shell 27 of BNC connector 21, power input interface 22, amplifying circuit 23, filtering circuit 24, single-chip microcomputer 25, bus interface 26, control center.
Fig. 3 is the filtering circuit figure of a kind of extremely low power dissipation high-tension switch cabinet of the utility model wireless temperature measurement transmitting-receiving child node device.
In figure, the first inductance L 31, the second inductance L 32, the 3rd inductance L 33, the first capacitor C 31, the second capacitor C 32, the 3rd capacitor C 33, the 4th capacitor C 34.
Fig. 4 is the amplification circuit diagram of a kind of extremely low power dissipation high-tension switch cabinet of the utility model wireless temperature measurement transmitting-receiving child node device.
In figure, operational amplifier LMV358, the first resistance R 41, the first resistance R 42, the first resistance R 43, the first resistance R 44, the 5th capacitor C 41.
Fig. 5 is the radio transmitting and receiving chip structural representation of a kind of extremely low power dissipation high-tension switch cabinet of the utility model wireless temperature measurement transmitting-receiving child node device.
In figure, spi bus interface 51, wireless transmission chip 52, filtering circuit 53, antennal interface 54, radio transmitting and receiving chip shell 55.
Fig. 6 is the transceiving chip filtering circuit figure of a kind of extremely low power dissipation high-tension switch cabinet of the utility model wireless temperature measurement transmitting-receiving child node device.
In figure, the 4th inductance L 61, the 5th inductance L 62, the 6th capacitor C 61, the 7th capacitor C 62, the 8th capacitor C 63.
Fig. 7 is the program flow diagram of a kind of extremely low power dissipation high-tension switch cabinet of the utility model wireless temperature measurement transmitting-receiving child node device.
Embodiment
The above is only the utility model plan explanation,, in order more to clearly demonstrate technological means of the present invention, below in conjunction with accompanying drawing and embodiment, the utility model is elaborated.
A kind of structure of extremely low power dissipation high-tension switch cabinet wireless temperature measurement transmitting-receiving child node device as shown in Figure 1, mainly consists of contact type temperature sensor 11, control center 12, radio transmitting and receiving chip 13, emitting antenna 14, two joint AA batteries 15, shell 16.The built-in control center 12 of shell 16, two joint AA battery 15 and radio transmitting and receiving chips 13, their annexation: control center 12 is connected and is connected with the AA battery with transceiving chip 13 respectively.
The structure of above-mentioned control center 12 as shown in Figure 2, control center 12 is comprised of the shell 27 of BNC connector 21, power input interface 22, amplifying circuit 23, filtering circuit 24, single-chip microcomputer 25, bus interface 26, control center, wherein, the built-in amplifying circuit 23 of the shell 27 of control center, filtering circuit 24 and single-chip microcomputer 25; BNC connector 21 and power input interface 22 are arranged on respectively shell 27 1 sides, and bus interface 26 is arranged on shell 27 another sides of control center, wherein, and the built-in amplifying circuit 23 of control center's shell 27, filtering circuit 24 and single-chip microcomputer 25; BNC connector 21 and power input interface 22 are arranged on respectively shell 27 1 sides, bus interface 26 is arranged on shell 27 another sides, their annexation: BNC connector 21 is connected with amplifying circuit 23 1 ends, and amplifying circuit 23 other ends are connected with single-chip microcomputer 25 1 ends; Power input interface 22 is connected with filtering circuit 24 1 ends, and filtering circuit 24 other ends are connected with single-chip microcomputer 25 1 ends; Single-chip microcomputer 25 other ends are connected with bus interface 26;
Control center 12 mainly completes temperature data reception, temperature judgement, overload alarm, reception control command and sends the temperature data function;
The filtering circuit 24 of control center 12 as shown in Figure 3, consist of the first inductance L 31, the second inductance L 32, the 3rd inductance L 33, the first capacitor C 31, the second capacitor C 32, the 3rd capacitor C 33, the 4th capacitor C 34: wherein, the node 2 of the first inductance L 31 and the node 1 of the second inductance L 32 are respectively by the first capacitor C 31, the second capacitor C 32 ground connection; The node 2 of the second inductance L 32 and the node 1 of the 3rd inductance L 33 are respectively by the 3rd capacitor C 33, the 4th capacitor C 34 ground connection;
Amplifying circuit 23 structures of control center 12 as shown in Figure 4, consist of operational amplifier LMV358, the first resistance R 41, the second resistance R 42, the 3rd resistance R 43, the 4th resistance R 44 and capacitor C 41: wherein, the first resistance R 41 right-hand members are connected with the positive input node 5 of operational amplifier LMV358; The positive input node 5 of LMV358 is connected with the left end of the second resistance R 42; The right-hand member of the second resistance R 42 is connected to the output terminal node 7 of operational amplifier LMV358; The output terminal of LMV358 is connected to ground by the 4th resistance R 44; The reverse input end node 6 of LMV358 is by the 5th capacitor C 41 ground connection; The reverse input end node of LMV358 is by the 3rd resistance R 43 ground connection;
The structure of radio transmitting and receiving chip 13 as shown in Figure 5, radio transmitting and receiving chip 13 adopts LTP5901-IPM to realize the radio transmission-receiving function of temperature data, radio transmitting and receiving chip 13 is comprised of the shell 55 of spi bus interface 51, wireless transmission chip 52, filtering circuit 53, antennal interface 54, radio transmitting and receiving chip, wherein, the built-in wireless transmission chip 52 of the shell 55 of radio transmitting and receiving chip, filtering circuit 53, spi bus interface 51 is arranged on shell 55 1 sides of radio transmitting and receiving chip, and antennal interface 54 is arranged on shell 55 another sides of radio transmitting and receiving chip; Spi bus interface 51, wireless transmission chip 52, filtering circuit 53, antennal interface 54 are contacted successively.
The filtering circuit 53 of radio transmitting and receiving chip 13 as shown in Figure 6, consist of the 4th inductance L 61, the 5th inductance L 62, the 6th capacitor C 61, the 7th capacitor C 62 and the 8th capacitor C 63: wherein, the 6th inductance L 61 right-hand member nodes 2 and the 7th inductance L 62 left end nodes 1 are by the 6th capacitor C 61 ground connection; The node of the 7th inductance L 62 right-hand member nodes 2 and the 8th capacitor C 63 right-hand members is by the 7th capacitor C 62 ground connection;
Install the annexation of each parts of each parts: the BNC connector 21 of control center 12 is connected by signal cable 17 with the BNC connector of temperature sensor 11, in order to the data of temperature sensor 11 are read in control center 12.Power input interface 22 is connected with the output interface of two joint AA batteries 15, completes the power supply of control center.Bus interface 26 is connected with the bus interface 51 of transceiving chip 13, realizes the data communication between control center 12 and transceiving chip 13.
As shown in Figure 7, after the device energising, first-selection is checked control center's 12 timer timings to the operating process of device,, if timing does not arrive, waits for always; If timing arrives, read the numerical value of contact type temperature sensor 11, and judge whether this temperature value transfinites, if transfinite, report to the police, then this numerical value is written to radio transmitting and receiving chip 13 by control bus, by radio transmitting and receiving chip 13, by communication, sends to management node.Then, device enters dormant state,, until next timing arrives, so repeats.
The shell 16 of extremely low power dissipation high-tension switch cabinet wireless temperature measurement transmitting-receiving child node device, the shell 27 of control center, the shell 55 of radio transmitting and receiving chip all adopt epoxy resin insulation material.
As seen, the present invention adopts the single-chip microcomputer of the transceiving chip of extremely low power dissipation and low-power consumption as control center, can complete the radio communication of 2km with interior maximum 128 nodes, has the advantages that communication reliability is good, communication distance is suitable and power consumption is extremely low.After adopting the present invention program, two joint AA batteries can guarantee that system is not less than 80 months normal working hours, have greatly reduced the maintenance period of wireless temperature measuring device for switch cabinet, have saved cost of labor, have improved the assets utilization rate.
The above; it is only preferred embodiment of the present invention; not the present invention is done any pro forma restriction, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection scope of the present invention.

Claims (4)

1. an extremely low power dissipation high-tension switch cabinet wireless temperature measurement is received and dispatched the child node device, it is characterized in that: mainly by contact type temperature sensor, control center, two joint AA batteries, radio transmitting and receiving chip, signal cable, emitting antenna and shell, formed, the built-in control center of shell, two joint AA battery and radio transmitting and receiving chips, their annexation: control center is connected with the AA battery with transceiving chip respectively;
1) described control center consists of low-power scm MSP430, adopt 8M Low Drift Temperature crystal oscillator as system clock or adopt 32.768k Low Drift Temperature crystal oscillator as real-time clock, control center is comprised of BNC connector, power input interface, amplifying circuit, filtering circuit, single-chip microcomputer, bus interface, control center's shell: wherein, and the built-in amplifying circuit of control center's shell, filtering circuit and single-chip microcomputer; BNC connector and power input interface are arranged on respectively shell one side, and bus interface is arranged on the shell another side, their annexation: BNC connector is connected with amplifying circuit one end, and the amplifying circuit other end is connected with single-chip microcomputer one end; Power input interface is connected with filtering circuit one end, and the filtering circuit other end is connected with single-chip microcomputer one end; The single-chip microcomputer other end is connected with bus interface;
1.1) filtering circuit 24 of described control center consists of the first inductance L 31, the second inductance L 32, the 3rd inductance L 33, the first capacitor C 31, the second capacitor C 32, the 3rd capacitor C 33, the 4th capacitor C 34: wherein, the node 2 of the first inductance L 31 and the node 1 of the second inductance L 32 are respectively by the first capacitor C 31, the second capacitor C 32 ground connection; The node 2 of the second inductance L 32 and the node 1 of the 3rd inductance L 33 are respectively by the 3rd capacitor C 33, the 4th capacitor C 34 ground connection;
1.2) described amplifying circuit consists of operational amplifier LMV358, the first resistance R 41, the second resistance R 42, the 3rd resistance R 43, the 4th resistance R 44 and capacitor C 41: wherein, the first resistance R 41 right-hand members are connected with the positive input node 5 of operational amplifier LMV358; The positive input node 5 of LMV358 is connected with the left end of the second resistance R 42; The right-hand member of the second resistance R 42 is connected to the output terminal node 7 of operational amplifier LMV358; The output terminal of LMV358 is connected to ground by the 4th resistance R 44; The reverse input end node 6 of LMV358 is by the 5th capacitor C 41 ground connection; The reverse input end node of LMV358 is by the 3rd resistance R 43 ground connection;
2) described radio transmitting and receiving chip LTP5901-IPM is comprised of spi bus interface, wireless transmission chip, filtering circuit, antennal interface, radio transmitting and receiving chip shell: wherein, the built-in wireless transmission chip of radio transmitting and receiving chip shell, filtering circuit, the spi bus interface is arranged on shell one side, and antennal interface is arranged on radio transmitting and receiving chip shell another side; Spi bus interface, wireless transmission chip, filtering circuit, antennal interface are contacted successively:
Described filtering circuit consists of the 4th inductance L 61, the 5th inductance L 62, the 6th capacitor C 61, the 7th capacitor C 62 and the 8th capacitor C 63: wherein, the 4th inductance L 61 right-hand member nodes 2 and the 5th inductance L 62 left end nodes 1 are by the 6th capacitor C 61 ground connection; The node of the 7th inductance L 62 right-hand member nodes 2 and the 8th capacitor C 63 right-hand members is by the 7th capacitor C 62 ground connection;
Install the annexation of each parts:
The BNC connector of described control center is connected with the signal cable of temperature sensor; Power input interface is connected with the output interface of two joint AA batteries; Bus interface is connected with the bus interface of transceiving chip;
The spi bus interface of described transceiving chip is connected with the bus interface of control center; The antennal interface of described transceiving chip is connected with emitting antenna.
2. a kind of extremely low power dissipation high-tension switch cabinet wireless temperature measurement according to claim 1 is received and dispatched the child node device, it is characterized in that: described radio transmitting and receiving chip is LTP5901-IPM, all adopting precision with peripheral circuit resistance is per mille, and temperature coefficient is less than 5 * 10 -6/ ℃ High Precision Low Temperature float resistance; Electric capacity adopts all that electric capacity is stable, temperature range is wide, and temperature is floated little NOP capacitor.
3. a kind of extremely low power dissipation high-tension switch cabinet wireless temperature measurement according to claim 1 is received and dispatched the child node device, and it is characterized in that: shell, control center's shell, radio transmitting and receiving chip shell all adopt epoxy resin insulation material, can tolerate and be not less than the 35kV high pressure.
4. a kind of extremely low power dissipation high-tension switch cabinet wireless temperature measurement transmitting-receiving child node device according to claim 1 is characterized in that: described signal cable be 5MHz with interior decay less than the 0.15dB/m single core coaxial cable.
CN2013201157330U 2013-03-14 2013-03-14 Extra-low power consumption transmit-receive descendant node type wireless temperature measuring device for high voltage switchgear Expired - Fee Related CN203288058U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103218903A (en) * 2013-03-14 2013-07-24 广西电网公司电力科学研究院 Extreme low-power high voltage switch board wireless temperature measurement transmitting-receiving sub-node system
CN105374182A (en) * 2014-08-26 2016-03-02 上海纳普信息科技有限公司 Control method for micro-power consumption sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103218903A (en) * 2013-03-14 2013-07-24 广西电网公司电力科学研究院 Extreme low-power high voltage switch board wireless temperature measurement transmitting-receiving sub-node system
CN105374182A (en) * 2014-08-26 2016-03-02 上海纳普信息科技有限公司 Control method for micro-power consumption sensor

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Termination date: 20160314