CN109374149A - A kind of switch cabinet temperature on-line monitoring system using NTC temperature measurement circuit - Google Patents
A kind of switch cabinet temperature on-line monitoring system using NTC temperature measurement circuit Download PDFInfo
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- CN109374149A CN109374149A CN201811279249.5A CN201811279249A CN109374149A CN 109374149 A CN109374149 A CN 109374149A CN 201811279249 A CN201811279249 A CN 201811279249A CN 109374149 A CN109374149 A CN 109374149A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses a kind of switch cabinet temperature on-line monitoring systems using NTC temperature measurement circuit, including signal transmission unit, data acquisition transmission unit and processing and diagnosis unit, signal transmission unit include wireless temperature module；It includes signal processing module, data acquisition module and signal transmission module that data, which acquire transmission unit,；Processing and diagnosis unit include data processing module and fault diagnosis module.Wireless temperature module is directly installed on temperature measuring point, the temperature change that electrical node can fast and effeciently be reacted improves the timeliness and accuracy of detection, and the wireless telecommunications between data acquisition transmission unit, the wiring and security risk for avoiding wired connection, solve the problems, such as high and low voltage isolation；And low power dissipation design is used, guarantee system longtime running.The information of previous data is checked with available data by fault diagnosis module, finds trouble location, carries out corresponding breakdown maintenance action, solves potential faults, it is ensured that the safety and stability of network system operation.
Description
Technical field
The invention belongs to electric device maintenance field, it is related to a kind of switch cabinet temperature using NTC temperature measurement circuit and supervises online
Examining system.
Background technique
Currently, closed 10kV high-tension switch cabinet because current-carrying load is excessive causes equipment heating in power distribution network, leads to equipment
Phenomena such as failure, influence power supply reliability, has drastically influenced the normal operation of network system, and there are biggish security risks.Cause
This will reinforce the detection to its operating status, the especially monitoring of running temperature in equipment running process, so that it is guaranteed that it is transported
Capable safety and stability.
For the normal operation for guaranteeing high-tension switch cabinet, the reliability of electric system is improved, needs to understand in switchgear at any time
Portion's device state and temperature variations, so being had a very important significance to the on-line temperature monitoring of switchgear weakness.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of switch using NTC temperature measurement circuit is provided
Cabinet temperature online monitoring system.
In order to achieve the above objectives, the present invention is achieved by the following scheme:
A kind of switch cabinet temperature on-line monitoring system using NTC temperature measurement circuit, including the acquisition of signal transmission unit, data
Transmission unit and processing and diagnosis unit, in which:
Signal transmission unit includes equipment to be monitored and wireless temperature module, and wireless temperature module is directly installed on to be monitored
The temperature measuring point of equipment is sent to data by wireless transmission for monitoring the temperature of temperature measuring point, and by the temperature signal of temperature measuring point
Acquire transmission unit；
It includes signal processing module, data acquisition module and signal transmission module that data, which acquire transmission unit, in which:
Signal processing module is used to optimize the signal that the conveying of wireless temperature module comes and noise reduction, guarantees the complete of signal
Whole property and accuracy；
Data acquisition module treated for receiving signal processing module signal, and carry out logging data after analog-to-digital conversion
Acquisition module；
Signal transmission module is used to the signal of logging data acquisition module being transmitted to processing and diagnosis unit；
Processing and diagnosis unit include data processing module and fault diagnosis module, in which:
The data processing module signal that transmission module conveys for receiving data, and signal is read and analyzed, it is right
Sensitive data is checked, and finds failure in time from data variation；
Fault diagnosis module is used to transfer the signal of previous data, and the signal come with data processing module conveying carries out core
It is right, it finds data difference, finds trouble location, generate corresponding breakdown maintenance signal and export.
A further improvement of the present invention lies in that:
It is communicated wirelessly between wireless temperature module and data acquisition transmission unit by frequency range 433MHz；The data
It acquires transmission unit and uses RS485 bus communication interface, using standard Modbus communication protocol；The wireless temperature module is micro-
The embedded system of type.
Wireless temperature module includes NTC temperature measurement circuit, the first power supply, processor module and wireless communication module, in which:
NTC temperature measurement circuit is used to measure the temperature of measurement point, and by data transfer to processor module；
First power supply takes power supply using 3.3V lithium battery or CT induction, for powering to processor module；
Processor module be used to handle NTC temperature measurement circuit send to measurement data, and carry out analog-to-digital conversion；
Wireless communication module is used for that treated that temperature data is sent to data adopts by processor module by being wirelessly transferred
Collect transmission unit.
Wireless communication module can receive the configuration order that processor module issues after the reset, periodically give after the completion of configuration
Data acquire transmission unit and send processor module treated temperature data.
Processor module uses low-power scm STM8L051F3P6, and uses the operational mode of lowest power consumption；Wirelessly
Communication module uses AS10-SMD module, includes Si4463 radio frequency chip, and use low-power consumption mode.
NTC temperature measurement circuit includes thermometric half-bridge circuit, MOS field effect transistor, the grid of MOS field effect transistor and source
Resistance and first capacitor between pole；MOS field effect transistor source electrode connects processor module, drain electrode connection half-bridge circuit；
First capacitor one end connects MOS field effect transistor gate, other end ground connection.
MOS field effect transistor is the P-channel MOS field effect transistor DTS2301 of low-power consumption.
The resistance value of resistance is 100K Ω, and the first capacitor is 104 capacitors.
Thermometric half-bridge circuit includes second source, resistor, the second capacitor and negative tempperature coefficient thermistor；Resistor is defeated
Enter end connection second source, output end connects second capacitor one end, second capacitor other end ground connection；Negative tempperature coefficient thermistor
It is in parallel with the second capacitor.
Second source is 3.3V lithium battery or CT induction takes power supply, and second capacitor is 104 capacitors.
Compared with prior art, the invention has the following advantages:
The present invention passes through letter for the power supply problem of current switchgear In-Line Temperature Measure System and the situation of intellectual analysis deficiency
Number transducing unit, data acquisition transmission unit and processing and diagnosis unit, realize and carry out state to switchgear internal components
On-line monitoring.Signal transmission unit includes wireless temperature module, and wireless temperature module is directly installed on temperature measuring point, can be quickly and effectively
Ground reacts the temperature change of electrical node, improves the timeliness and accuracy of detection；Wireless temperature module and data acquisition transmission
It is communicated wirelessly between unit by free frequency range 433MHz, avoids the wiring and security risk of wired connection, from basic
On solve the problems, such as high and low voltage isolation.Certain optimization, noise reduction etc. are carried out to signal by signal processing module, to protect
Demonstrate,prove the integrality and accuracy of signal.The information received is read and analyzed by data processing system, to sensitive number
According to being checked, so as to find failure in time from data variation, accomplish real-time detection.By fault diagnosis system transfer with
It toward the information of data, and is checked with the case where available data, finds data difference, trouble location is found, in fault diagnosis
After the completion, corresponding maintenance signal output is generated, the personnel that arrange work carry out corresponding breakdown maintenance action, it is hidden to solve failure
Suffer from, it is ensured that the safety and stability of network system operation.
Further, wireless temperature module is miniature embedded system, is penetrated using super low power consuming single chip processor and low-power consumption
Frequency chip guarantees that system can be in longtime running under hyperbaric environment.
Further, NTC temperature measurement circuit uses low power dissipation design, has carried out simplest hardware design to reach thermometric mesh
's.Using the P-channel MOS field effect transistor DTS2301 of low-power consumption as the power switch of temperature measurement circuit, it is logical to control power supply
It is disconnected.When not needing sampling, control field-effect tube is exported using processor, is allowed to close temperature measurement circuit power supply, reach
Reduce the purpose of wireless temperature module overall power.Decoupling and filtering are carried out by 104 capacitors, improves the accurate of monitoring system
Property；The biggish resistance of resistance value is set between the grid and source electrode of MOS field effect transistor, provides biased electrical for field-effect tube
Pressure, is also used as bleed off resistance, plays the role of protecting grid and source electrode；The power consumption of NTC temperature measurement circuit is decreased simultaneously.
Detailed description of the invention
Fig. 1 is on-line detecting system flow diagram of the invention；
Fig. 2 is wireless temperature module principle block diagram of the invention；
Fig. 3 is NTC temperature measurement circuit low power dissipation design circuit diagram of the invention；
Fig. 4 is the thermometric half-bridge circuit figure of NTC of the invention as measuring cell.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
The invention will be described in further detail with reference to the accompanying drawing:
Referring to Fig. 1, the present invention uses the switch cabinet temperature on-line monitoring system of NTC temperature measurement circuit, using singlechip technology,
Utilize the high-tension switch cabinet In-Line Temperature Measure System based on Internet of Things of wireless telecommunications and Design of Network Communication, including signal transmitting list
Member, data acquisition transmission unit and processing and diagnosis unit；Wherein:
Signal transmission unit includes wireless temperature module, and wireless temperature module is directly installed on the thermometric of equipment to be monitored
Point is sent to data acquisition transmission list by wireless transmission for monitoring the temperature of temperature measuring point, and by the temperature signal of temperature measuring point
Member；
It includes signal processing module, data acquisition module and signal transmission module that data, which acquire transmission unit,；Wherein:
Signal processing module is as existing for a connector arrangement, and main action is carried out centainly to signal
Optimization, noise reduction etc., to guarantee the integrality and accuracy of signal.
The main function of data acquisition module is the various signals for receiving conveying and coming, and after further progress A/D conversion
Input system.
Signal transmission module will carry a signal transmitting apparatus, be able to carry out signal for non-moving monitoring system
Conveying, and mobile monitoring system is then only needed to reinforce signal isolation.
Processing and diagnosis unit include data processing module and fault diagnosis module, in which:
The main function of data processing module is that the information received is read and analyzed, and is arranged sensitive data
It looks into, so as to find failure in time from data variation.
Fault diagnosis module transfers the information of previous data, is checked with the case where available data, development dataset difference,
Find trouble location.Also corresponding breakdown maintenance action is carried out after the completion of fault diagnosis simultaneously, solve potential faults.
Referring to fig. 2, wireless temperature module principle figure of the present invention, wireless temperature module are miniature embedded systems, it
Hardware design is made of NTC temperature measurement circuit, power supply, processor module and wireless communication interface three parts；Wherein:
NTC temperature measurement circuit is responsible for measuring the variation of electrical node temperature；
Power supply takes power supply for powering to processor module using 3.3V lithium battery or CT induction；
Processor module be used to handle NTC temperature measurement circuit send to measurement data, and carry out analog-to-digital conversion；
Wireless communication interface, which is mainly responsible for, is sent to wireless temperature acquisition machine for the temperature data of measuring point by being wirelessly transferred；
Wireless communication interface can receive the configuration order that host node issues after the reset, and the temperature number of acquisition is regularly sent after the completion of configuration
According to.
NTC temperature measurement circuit carries out thermometric using the half-bridge circuit that negative tempperature coefficient thermistor forms.
MCU (processor module) in wireless temperature module uses low-power scm STM8L051F3P6, and using most
The operational mode of low-power consumption.
Wireless communication module uses AS10-SMD module, includes the Si4463 radio frequency chip of Silicon Labs, and use
Low-power consumption mode guarantees that system can be in longtime running under hyperbaric environment.
Referring to Fig. 3, NTC temperature measurement circuit of the present invention has carried out NTC temperature measurement circuit simplest using low power dissipation design
Hardware design reaches thermometric purpose, including thermometric half-bridge circuit, MOS field effect transistor, MOS field effect transistor grid
Resistance and first capacitor between source electrode；MOS field effect transistor source electrode connects processor module, drain electrode connection half-bridge electricity
Road；First capacitor connects MOS field effect transistor gate.
Select by negative tempperature coefficient thermistor as measuring cell half-bridge circuit as thermometric half-bridge circuit.
Using the P-channel MOS field effect transistor DTS2301 of low-power consumption as the power switch of temperature measurement circuit, control electricity
Source on-off.
When not needing sampling, control field-effect tube is exported using processor module, is allowed to close temperature measurement circuit
Power supply achievees the purpose that reduce wireless temperature module overall power.
The effect of 104 capacitors is decoupling and filtering.
Resistance between the grid and source electrode of P-channel MOS field effect transistor provides biasing for P-channel metal-oxide-semiconductor field effect transistor
Voltage is also used as bleed off resistance, plays the role of that grid and source electrode is protected to select resistance value to reduce its power consumption
Bigger resistance (resistance value is 100K Ω).
Referring to fig. 4, half-bridge circuit of the NTC of the present invention as measuring cell, circuit are taken by 3.3V lithium battery or CT induction
Electric power supply power supply, including power supply, resistor, the second capacitor and negative tempperature coefficient thermistor；Resistor input terminal connects power supply,
Output end connects the second capacitor, and negative tempperature coefficient thermistor is in parallel with the second capacitor.
RX resistor and negative tempperature coefficient thermistor RT constitute temperature measurement circuit.
104 capacitors are as decoupling capacitance.
In wireless temperature module real work, negative tempperature coefficient thermistor NTC perceives the temperature change of measuring point, this
Temperature change will lead to the variation of its own resistance, and then cause voltage V0Variation.The V of variation0Value passes through wireless temperature module
In processor module (MCU) analog-to-digital conversion and processing, communicate information to wireless collection device and computer.Temperature-measuring range
It is -40 DEG C~150 DEG C, measurement accuracy is ± 1 DEG C.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (10)
1. a kind of switch cabinet temperature on-line monitoring system using NTC temperature measurement circuit, which is characterized in that including signal transmitting list
Member, data acquisition transmission unit and processing and diagnosis unit, in which:
Signal transmission unit includes equipment to be monitored and wireless temperature module, and wireless temperature module is directly installed on equipment to be monitored
Temperature measuring point, data acquisition is sent to by wireless transmission for monitoring the temperature of temperature measuring point, and by the temperature signal of temperature measuring point
Transmission unit；
It includes signal processing module, data acquisition module and signal transmission module that data, which acquire transmission unit, in which:
Signal processing module is used to optimize the signal that the conveying of wireless temperature module comes and noise reduction, guarantees the integrality of signal
And accuracy；
Data acquisition module treated for receiving signal processing module signal, and logging data acquires after carrying out analog-to-digital conversion
Module；
Signal transmission module is used to the signal of logging data acquisition module being transmitted to processing and diagnosis unit；
Processing and diagnosis unit include data processing module and fault diagnosis module, in which:
The data processing module signal that transmission module conveys for receiving data, and signal is read and analyzed, to sensitivity
Data are checked, and find failure in time from data variation；
Fault diagnosis module is used to transfer the signal of previous data, and the signal come with data processing module conveying is checked,
It was found that data difference, finds trouble location, generates corresponding breakdown maintenance signal and export.
2. the switch cabinet temperature on-line monitoring system according to claim 1 using NTC temperature measurement circuit, which is characterized in that
It is communicated wirelessly between the wireless temperature module and data acquisition transmission unit by frequency range 433MHz；The data acquisition
Transmission unit uses RS485 bus communication interface, using standard Modbus communication protocol；The wireless temperature module is miniature
Embedded system.
3. the switch cabinet temperature on-line monitoring system according to claim 2 using NTC temperature measurement circuit, which is characterized in that
The wireless temperature module includes NTC temperature measurement circuit, the first power supply, processor module and wireless communication module, in which:
NTC temperature measurement circuit is used to measure the temperature of measurement point, and by data transfer to processor module；
First power supply takes power supply using 3.3V lithium battery or CT induction, for powering to processor module；
Processor module be used to handle NTC temperature measurement circuit send to measurement data, and carry out analog-to-digital conversion；
Wireless communication module is used for processor module treated temperature data is sent to data acquisition biography through wireless transmission
Defeated unit.
4. the switch cabinet temperature on-line monitoring system according to claim 3 using NTC temperature measurement circuit, which is characterized in that
The wireless communication module can receive the configuration order that processor module issues after the reset, and data are given in timing after the completion of configuration
It acquires transmission unit and sends processor module treated temperature data.
5. the switch cabinet temperature on-line monitoring system according to claim 3 using NTC temperature measurement circuit, which is characterized in that
The processor module uses low-power scm STM8L051F3P6, and uses the operational mode of lowest power consumption；Wireless communication
Module uses AS10-SMD module, includes Si4463 radio frequency chip, and use low-power consumption mode.
6. the switch cabinet temperature on-line monitoring system according to claim 3 using NTC temperature measurement circuit, which is characterized in that
The NTC temperature measurement circuit include thermometric half-bridge circuit, MOS field effect transistor, the grid of MOS field effect transistor and source electrode it
Between resistance and first capacitor；MOS field effect transistor source electrode connects processor module, drain electrode connection half-bridge circuit；First
Capacitor one end connects MOS field effect transistor gate, other end ground connection.
7. the switch cabinet temperature on-line monitoring system according to claim 6 using NTC temperature measurement circuit, which is characterized in that
The MOS field effect transistor is the P-channel MOS field effect transistor DTS2301 of low-power consumption.
8. the switch cabinet temperature on-line monitoring system according to claim 6 using NTC temperature measurement circuit, which is characterized in that
The resistance value of the resistance is 100K Ω, and the first capacitor is 104 capacitors.
9. the switch cabinet temperature on-line monitoring system according to claim 6 using NTC temperature measurement circuit, which is characterized in that
The thermometric half-bridge circuit includes second source, resistor, the second capacitor and negative tempperature coefficient thermistor；Resistor input terminal
Second source is connected, output end connects second capacitor one end, second capacitor other end ground connection；Negative tempperature coefficient thermistor and
Two capacitors are in parallel.
10. the switch cabinet temperature on-line monitoring system according to claim 9 using NTC temperature measurement circuit, which is characterized in that
The second source is 3.3V lithium battery or CT induction takes power supply, and second capacitor is 104 capacitors.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811279249.5A CN109374149A (en) | 2018-10-30 | 2018-10-30 | A kind of switch cabinet temperature on-line monitoring system using NTC temperature measurement circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811279249.5A CN109374149A (en) | 2018-10-30 | 2018-10-30 | A kind of switch cabinet temperature on-line monitoring system using NTC temperature measurement circuit |
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| CN109374149A true CN109374149A (en) | 2019-02-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702234A (en) * | 2019-11-05 | 2020-01-17 | 广东电网有限责任公司 | GIS infrared temperature measuring device and temperature compensation calibration method thereof |
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| CN207379633U (en) * | 2017-11-07 | 2018-05-18 | 郑州华力信息技术有限公司 | Temperature of high-tension switch cabinet exception intellectual faculties |
| CN207528355U (en) * | 2017-12-04 | 2018-06-22 | 贵州电网有限责任公司 | A kind of switchgear passive and wireless high-voltage contact on-line temperature monitoring device |
| CN207570676U (en) * | 2017-10-27 | 2018-07-03 | 华北电力大学 | A kind of high-pressure switch cabinet wireless temperature-measurement |
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2018
- 2018-10-30 CN CN201811279249.5A patent/CN109374149A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3811189A1 (en) * | 1988-04-01 | 1989-10-19 | Sueddeutsche Kuehler Behr | Method for environmental control in electrical switching cabinets |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110702234A (en) * | 2019-11-05 | 2020-01-17 | 广东电网有限责任公司 | GIS infrared temperature measuring device and temperature compensation calibration method thereof |
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