CN204495472U - High voltage isolation switch contact infrared array temperature detection monitoring system - Google Patents
High voltage isolation switch contact infrared array temperature detection monitoring system Download PDFInfo
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- CN204495472U CN204495472U CN201420683056.7U CN201420683056U CN204495472U CN 204495472 U CN204495472 U CN 204495472U CN 201420683056 U CN201420683056 U CN 201420683056U CN 204495472 U CN204495472 U CN 204495472U
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Abstract
The utility model relates to the temp measuring system of transformer station, particularly relates to a kind of high voltage isolation switch contact infrared array temperature detection monitoring system.It is made up of infrared temperature sensor array, microprocessor unit, keyboard unit, display screen unit, acousto-optic warning unit, level conversion unit, CAN controller, light-coupled isolation unit, CAN transceiver controller, power conversion unit; Infrared temperature sensor array carries out non-cpntact measurement to the high voltage isolation switch contact temperature in high-tension switch cabinet, the signal measured sends into microprocessor unit, carries out result being shown in real time by display screen on the one hand after operational analysis through microprocessor unit; On the other hand by CAN controller and CAN transceiver controller, CAN-BAS is sent in its outputs, and making to hang over far-end duty room in CAN or control center's computer equipment can real-time sharing and process these data.
Description
Technical field
The present invention relates to the temp measuring system of transformer station, particularly relate to a kind of high voltage isolation switch contact infrared array temperature detection monitoring system.
Background technology
In electric system, the high-tension switch cabinet of generating plant and transformer station and cable branch box are the important equipment ensureing that power supply is reliable and stable.The reliability requirement of existing consumer to power supply is more and more higher, and at high voltage, under current state, functional reliability and the isolation switch contact temperature rise of high-tension switch cabinet are closely related.In the operational process of electrical network, mechanical vibration, the reasons such as contact ablation can make contact conditions worsen, and contact resistance increases, and causes contact point temperature to raise, aggravation surface in contact oxygen
Change, cause local melting welding or contact to loosen place and produce arc discharge, finally cause the damage of electric equipment even to have a power failure or the major accident such as initiation fire.This kind of contact overheating fault accident is on the one hand from the quality problems of high-voltage board switch itself, more important
Reason be effective monitoring means of lacking at present for isolation switch contact temperature rise.Its reason one is to have exposed high pressure in cabinet, and common thermometry can not use; The online real-time temperature measurement system of switch cubicle adopted in its two current electric system due to install loaded down with trivial details, connect up heavy, safeguard inconvenience, cost is higher.
Summary of the invention
The object of the invention is for overcoming above-mentioned the deficiencies in the prior art, a kind of high voltage isolation switch contact infrared array contactless temperature-measuring supervisory system is provided.The present invention is by force pointed, good reliability, the advantages such as perfect function.Very large practical value is had to the operational reliability improving high voltage isolator and high-tension switch cabinet and even electric system.
For achieving the above object, the present invention adopts following technical proposals:
High voltage isolation switch contact infrared array temperature detection monitoring system is made up of infrared temperature sensor array, microprocessor unit, keyboard unit, display screen unit, acousto-optic warning unit, level conversion unit, CAN controller, light-coupled isolation unit, CAN transceiver controller, power conversion unit.
High voltage isolation switch contact temperature in infrared temperature sensor array 1 pair of high-tension switch cabinet carries out non-cpntact measurement, the signal measured sends into microprocessor unit 2, result is shown in real time by display screen 4 on the one hand after microprocessor unit 2 carries out operational analysis; Level conversion is carried out on the other hand by level conversion unit 6, level after conversion is input to CAN controller 7, CAN transceiver controller 9 is input to through light-coupled isolation unit 8, CAN-BAS is sent in its output, making to hang over far-end duty room in CAN or control center's computer equipment can real-time sharing and these data of process, when high voltage isolation switch contact temperature exceedes design temperature, acousto-optic warning unit 5 will give sound and light alarm, keyboard unit 3 and microprocessor 2 carry out man-machine conversation, arrange according to site specific needing the parameter detected; 220VAC is input to power conversion unit 10, exports many group direct supplys and provide required operating voltage voltage to different operating unit after rectifying and wave-filtering and conversion process;
The invention has the advantages that:
1, sensor adopts infrared temperature sensor array to carry out contactless temperature-measuring, effectively avoids contacting the harmful effect brought with high pressure, fundamentally solves the difficult problem that in high-tension switch cabinet, contact running temperature is not easily monitored.
2, select advanced MLX90620 infrared temperature sensor array and adopt advanced circuit design, MLX90620 is a kind of thermal imaging solution of high performance-price ratio.This 16 x 4 Far infra-red hot pile sensor array can cover the temperature range of-20 DEG C ~ 300 DEG C, the real-time calorific value collection of illustrative plates of target area can be generated, there is it, just can scan target area without the microbolometer of one point sensing device or costliness, greatly reduce manufacturing cost, improve the accuracy of the reliability of temperature monitoring, stability and data.
Accompanying drawing explanation
Fig. 1 is system chart
Fig. 2 is MLX90620 infrared temperature sensor array internal frame diagram
Fig. 3 MIX90620 infrared array sensor and microprocessor connection layout
Fig. 4 is CAN circuit
Fig. 5 infrared array principle of work FB(flow block).
Embodiment
Below in conjunction with the high voltage isolation switch contact infrared array temperature detection monitoring system following detailed description of accompanying drawing to invention.
High voltage isolation switch contact infrared array temperature detection monitoring system is made up of infrared temperature sensor array, microprocessor unit, keyboard unit, display screen unit, acousto-optic warning unit, level conversion unit, CAN controller, light-coupled isolation unit, CAN transceiver controller, power conversion unit.
High voltage isolation switch contact temperature in infrared temperature sensor array 1 pair of high-tension switch cabinet carries out non-cpntact measurement, infrared temperature sensor array 1 adopts the MLX90620 infrared temperature sensor array of Melexis Mai Lai core company, it is the non-touch sensor for measuring temperature of a kind of high precision, and the signal measured passes through I
2c interface communicates with microprocessor unit 2; After microprocessor unit 2 carries out operational analysis, result is shown the environment temperature inside high voltage isolation switch contact temperature and high-tension switch cabinet in real time by display screen 4 on the one hand;
Level conversion is carried out on the other hand by level conversion unit 6, microprocessor unit 2 output interface level is 3.3V, CAN controller 7 level is 5V, by level conversion unit 6 by microprocessor unit 2 output interface level boost to 5V, make it consistent with CAN controller 7 level.
Level after conversion is input to CAN controller 7, CAN transceiver controller 8 is input to through light-coupled isolation unit 8, CAN-BAS is sent in its output, making to hang over far-end duty room in CAN or control center's computer equipment can real-time sharing and these data of process, when high voltage isolation switch contact temperature exceedes design temperature, acousto-optic warning unit 5 will give sound and light alarm, warning message also will upload to far-end duty room or control center by CAN-BAS bus simultaneously, remind related personnel to take timely treatment measures; Keyboard unit 3 and microprocessor 2 carry out man-machine conversation, arrange according to site specific needing the parameter detected; 220VAC is input to power conversion unit 10, exports many group direct supplys and provide required operating voltage voltage to different operating unit after rectifying and wave-filtering and conversion process; Such as needed for MLX90620 infrared temperature sensor array, operating voltage is 2.6V DC voltage, and operating voltage needed for microprocessor is 3.3V DC voltage etc.
Fig. 2 is MLX90620 infrared temperature sensor array internal frame diagram, MIX90620 can be seen in the drawings by 16x4 as Suo Zucheng infrared thermopile array, that is MIX90620 comprises 64 infrared rays as rope, each as rope to having low noise chopper amplifier and high-speed ADC (Analog-digital Converter amplifier).PTAT (absolute temperature ratio circuit) sensor in chip carrys out measures ambient temperature.64 infrared rays to export through all digital filters as the output of rope and PTAT exists inner RAM, RAM and I
2c interface connects, and MLX90620 has built-in 2Kbit, and 256x8 EEPROM, EEPROM have independent I
2the configuration storing calibration constants and device is done in C address.External microprocessor passes through I
2the baseline results that the infrared ray sensor left in RAM is measured is read in C communication, in conjunction with the calibration figure of EEPROM in chip, jointly calculates final environment temperature Ta and object temperature To.
Fig. 3 is MIX90620 infrared array sensor and microprocessor connecting circuit figure,
In figure, IC1 is MIX90620 infrared array sensor, and it adopts industrial standard four pin T0-39 encapsulation, and one has 4 pins, pin 1(SCL) be I
2the serial clock signal of C communication protocol, pin 2(SDA) be I
2the serial digital I/O of C communication protocol, pin 3(VDD) be power supply input, pin 4(GND).Pin 1(SCL) with pin 2(SDA) be connected with external input power E+ respectively by the good Rb of pull-up resistor Ra, simultaneously respectively with the I of microprocessor
2c bus pin P3.1 is connected with P3.3 mouth, and what the present invention selected is MSP430F169 microprocessor.
Fig. 4 is CAN circuit, in bus circuit, IC2 is microprocessor MSP430F169, it is a kind of Mixed signal oscilloscope of TIX, have employed up-to-date Low-power Technology, a large amount of peripheral modules is incorporated in sheet by it, is particularly suitable for exploitation and design monolithic super low-power consumption system.MSP430 F169 microprocessor mainly has following features: (1) low-voltage, super low-power consumption.Operating voltage 3.3V, under RAM keeps closing working method, working current is only 0.15uA.(2) there is the analog to digital converter of 12, very high precision can be obtained, and eliminate the trouble using special analog to digital converter to come to design circuit strip.(3) jumbo storage space is had.
(4) there is serial communication interface, can be used for carrying out asynchronous or synchronous serial communication with computing machine.(5) hardware multiplier.This multiplier carries out the operation of multiplying independent of CPU, also improves the utilization ratio of CPU while improving multiplying speed.(6) serial in-system programming.By emulator, program is downloaded, and monitored by the duty of special software to program and single-chip microcomputer, be very easy to the debugging of program.
In figure, IC3 and IC4 is the two-way level converting device SN74LVC4245 of 8, supports the bi-directional conversion between 3.3V and 5V level.The output voltage of MSP430 F169 microprocessor is converted to 5V by it, for solving the level compatibling problem with CAN controller SJAl000 logical device interface.
A independently CAN controller SJAl000 of Tu ZhongIC5Shi Philips company, can complete the Physical layer of CAN and all functions of data link layer.SJAl000 is made up of CAN nucleus module, transmission buffer zone, interface FIFO, acceptance fitration and interface management logic.The transmitting-receiving of CAN nucleus module primary responsibility CAN information frame and the realization of CAN protocol, interface management logic is responsible for the interface of SJAl000 and master controller.When carrying out data transmission, master controller is sent into identifier and data and is sent buffer zone, then by sending request position, position in command register CMR, start CAN nucleus module from being about to send the data reading in buffer zone, and be assembled into complete CAN information frame by CAN protocol, bus is mail to by transceiver, thus the data started in CAN nucleus module reading transmission buffer area, complete CAN information frame is packaged into again by CAN protocol, mail to bus by transceiver, the capacity sending buffer area is 13 bytes.Acceptance fitration unit is delivered to after processing the information received and is received in FIFO, and receiving FIF0 is 64 bytes.The CAN transceiver 82C250 of Tu ZhongIC6Shi Philips company, it realizes the differential transmitting-receiving physical interface of CAN controller and bus.This transceiver has 3 kinds of different working methods available, respectively: at a high speed, slop control and standby mode.The resistance R200 connected over the ground by RS pin can carry out slop control to bus, and the electric current that slope is proportional on RS pin exports.For the application scenario that transmission rate request is higher, usually by direct for RS pin ground connection to select high speed mode.This mode does not take any measure to limit rising and descending slope, and shielded cable therefore must be adopted with shielded against radio frequency interference.The transmission of CAN controller is connected respectively by 1 high-speed photoelectric coupler 6N137 and 82C250 with receiving port, restrained effectively the interference that bus is introduced.Achieve the electrical isolation between transceiver and controller well, protection intelligent node core circuit trouble free service, and achieve the internodal electrical isolation of each CAN in bus.For realizing this electrical isolation, the direct supply of optocoupler both sides must be that two nothings are contacted directly, mutually isolated direct supply, otherwise adopts optocoupler just will lose meaning.
In figure, G1 and G2 is a for single pass high-speed light coupling apparatus BN137 photo coupler, and the 6th pin Vo output circuit of 6N137 photo coupler belongs to open collector circuit, necessary pull-up resistance; Second is between the 2nd pin of BN137 photo coupler and the 3rd pin be a LED, must be connected in series a current-limiting resistance; Signal inputs C100/C101 electric capacity from pin 2 and pin 3 can absorb ripple power lead, the impact to power supply when can reduce again photoisolator receiving terminal switch; Pin 6 is open-collector outputs, usually adds pull-up resistor R102/R103; C102/C103 is the equivalent capacity of output load, and it and R102/R103. affect the response time of device.
Fig. 5 is infrared array principle of work FB(flow block), from then on can know the course of work of MIX90620 infrared array sensor in principle of work FB(flow block).
The present invention has gone out above-mentioned case row and has also had display unit, key input unit, power conversion unit and acousto-optic warning unit, and these unit are all belong to popular very familiar publicly-owned technology, so just do not do too much elaboration at this.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (3)
1. a high voltage isolation switch contact infrared array temperature detection monitoring system, is characterized in that: it is made up of infrared temperature sensor array, microprocessor unit, keyboard unit, display screen unit, acousto-optic warning unit, level conversion unit, CAN controller, light-coupled isolation unit, CAN transceiver controller, power conversion unit, infrared temperature sensor array (1) carries out non-cpntact measurement to the high voltage isolation switch contact temperature in high-tension switch cabinet, the signal measured sends into microprocessor unit (2), result is shown in real time by display screen (4) on the one hand after microprocessor unit (2) carries out operational analysis, level conversion is carried out on the other hand by level conversion unit (6), level after conversion is input to CAN controller (7), CAN transceiver controller (9) is input to through light-coupled isolation unit (8), CAN-BAS is sent in its output, making to hang over far-end duty room in CAN or control center's computer equipment can real-time sharing and these data of process, when high voltage isolation switch contact temperature exceedes design temperature, acousto-optic warning unit (5) will give sound and light alarm, keyboard unit (3) and microprocessor (2) carry out man-machine conversation, arrange according to site specific needing the parameter detected, 220VAC is input to power conversion unit (10), exports many group direct supplys and provide required operating voltage voltage to different operating unit after rectifying and wave-filtering and conversion process.
2. a kind of high voltage isolation switch contact infrared array temperature detection monitoring system according to claim 1, be further characterized in that: infrared temperature sensor array (1) adopts the MLX90620 infrared temperature sensor array of Melexis Mai Lai core company, it is the non-touch sensor for measuring temperature of a kind of high precision, and the signal measured passes through I
2c interface and microprocessor unit (2) I
2the carrying out of C interface communicates.
3. a kind of high voltage isolation switch contact infrared array temperature detection monitoring system according to claim 1, is further characterized in that: adopt independently CAN controller SJAl000, CAN transceiver 82C250, two-way level converting device SN74LVC4245 and high-speed photoelectric coupler 6N137 to constitute the CAN control system of system; Two-way level converting device SN74LVC4245 it the output voltage of MSP430 F169 microprocessor is converted to 5V, for solving the level compatibling problem with CAN controller SJAl000 logical device interface, CAN controller SJAl000 completes the Physical layer of CAN and all functions of data link layer; CAN transceiver 82C250 realizes the differential transmitting-receiving physical interface function of CAN controller and bus; CAN controller SJAl000 is connected by high-speed photoelectric coupler 6N137 and 82C250, restrained effectively the interference that bus is introduced, achieves the electrical isolation between transceiver and controller well, protection intelligent node core circuit trouble free service.
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| CN201420683056.7U CN204495472U (en) | 2014-11-17 | 2014-11-17 | High voltage isolation switch contact infrared array temperature detection monitoring system |
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| CN201420683056.7U CN204495472U (en) | 2014-11-17 | 2014-11-17 | High voltage isolation switch contact infrared array temperature detection monitoring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334889A (en) * | 2015-11-26 | 2016-02-17 | 上海工业自动化仪表研究院 | Welding preheating temperature intelligent measurement and control system |
| CN109672477A (en) * | 2019-01-29 | 2019-04-23 | 天津师范大学 | A kind of acoustic array power supply and order downlink multiplex system and its control method based on pulse density modulated |
-
2014
- 2014-11-17 CN CN201420683056.7U patent/CN204495472U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334889A (en) * | 2015-11-26 | 2016-02-17 | 上海工业自动化仪表研究院 | Welding preheating temperature intelligent measurement and control system |
| CN109672477A (en) * | 2019-01-29 | 2019-04-23 | 天津师范大学 | A kind of acoustic array power supply and order downlink multiplex system and its control method based on pulse density modulated |
| CN109672477B (en) * | 2019-01-29 | 2023-08-29 | 四川天源宏创科技有限公司 | Acoustic array power supply and command downlink multiplexing system based on pulse density modulation and control method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150722 Termination date: 20181117 |
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| CF01 | Termination of patent right due to non-payment of annual fee |