CN203132708U - Wireless temperature measurement sensor used for on-line detection of cable termination - Google Patents
Wireless temperature measurement sensor used for on-line detection of cable termination Download PDFInfo
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- CN203132708U CN203132708U CN201320139027.XU CN201320139027U CN203132708U CN 203132708 U CN203132708 U CN 203132708U CN 201320139027 U CN201320139027 U CN 201320139027U CN 203132708 U CN203132708 U CN 203132708U
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Abstract
The utility model relates to a wireless temperature measurement sensor used for on-line detection of cable termination, which belongs to the measuring field. The wireless temperature measurement sensor comprises a temperature sensor, a low-power one-chip microcomputer, a wireless transmitting module and a random power supply, wherein, a low-power single chip microcomputer is connected to a signal output part of the temperature sensor through a serial bus; the low-power single chip microcomputer is connected to the power supply through an I/O port and a power supply end of the temperature sensor; the wireless transmitting module is a Zigbee wireless communication module; the low-power single chip microcomputer is connected to a signal input part of the Zigbee wireless communication module through the serial bus; an electronic switching circuit is provided between the random power supply and the power supply end of the Zigbee wireless communication module; and a control end of the electronic switching circuit is connected to the I/O end of the low-power single chip microcomputer. According to the utility model, a data transmission mode of Zigbee wireless network is employed for solving the problem of reliable isolation of a high-pressure end and potential of a low voltage system, a digital temperature sensor is used for outputting digital signals, and is directly connected to CPU through serial bus, thereby the stability is high. The wireless temperature measurement sensor can be widely used in the equipment state monitoring field of an electric power system.
Description
Technical field
The utility model belongs to fields of measurement, relates in particular to a kind of on-line condition monitoring device for power equipment.
Background technology
In order to ensure the generation of electrical equipment due serviceable life, minimizing accident, except the dielectric level of equipment is monitored, must monitor and protect the heat generating spot temperature of equipment in service.
Power equipment conduction junction, splicing position to electrically contact situation bad be the major reason that causes that this place's temperature is too high.Therefore junction and splicing position are the main positions of on-line monitoring.
Existing on-line temperature monitoring mode mainly contains two kinds: the contact temperature-measuring of the contactless and employing thermosensitive device of infrared radiation.Contactless infrared sensor is owing to be subjected to environment, humidity, atmosphericly influence greatlyyer, and infrared radiation is just blocked can't accurately be measured, and use has very big limitation.And the sensor of contact directly contacts with point for measuring temperature, and it is little disturbed by environmental factor, can realize that accurate, fast temperature detects.
The deficiency of existing contact temperature-measuring scheme: the contact temperature-measuring scheme adopts thermopair, Fibre Optical Sensor, resistance sensor as temperature probe usually, when adopting thermopair to make sensor, because thermocouple cold junction can not remain on 0 ℃, at room temperature measure and to add cold junction compensation, when hot junction and cold junction spacing are far away in actual measurement, also need to adopt compensating wire; Adopt Fibre Optical Sensor to make sensor when (comprising transmitting terminal, receiving end, connector and optical fiber), how Fibre Optical Sensor installs cabling is a problem very much, the optical fiber transmission signal scheme also is not easy to accomplish the isolation fully of high electronegative potential, when transmitting terminal was installed high-pressure side, the problem of insulation against ground also can't solve; Adopt the direct contact measurement of resistance sensor, at noble potential with wired conveying signal, the simple utilization clearance isolates high electronegative potential, transmitting temperature signal by the infrared electro conversion is a good way, but infrared emission, receiving tube expose, long-term use can fall dust, filth, make the signal transmission reliability gradually the variation influence measured value also be one and be difficult to the problem that solves, also must carry out on the convenience that on-the-spot professional Installation and Debugging use undesirable in addition.
So key problem in technology of temperature on-line monitoring device: detecting major technique for low-pressure system is to solve temperature sensor to insulate and the heat conduction problem, detects for high-pressure system and must effectively solve the problem that high voltage is scurried into low-voltage system.Because temperature-sensing element, detects the control module of processing at high-pressure side in low-pressure system, so being the current potential of realizing high-pressure side and low-voltage system, technological core reliably isolates.
The utility model content
Technical problem to be solved in the utility model provides a kind of wireless temperature measurement sensor for the online detection of cable termination, it adopts the data transfer mode of Zigbee wireless network, solve the reliable isolating problem of high-pressure side and low-voltage system current potential, adopt digital temperature sensor output digital signal, direct and the cpu i/f by universal serial bus, the sensor with respect to the output of analog quantitys such as thermopair, thermal resistance need not verification, need not to revise, so stabilization is high.
The technical solution of the utility model is: a kind of wireless temperature measurement sensor for the online detection of cable termination is provided, it is characterized in that: described radio temperature sensor comprises temperature sensor, low-power scm, wireless transmitter module and power supply at random, lithium battery and storage capacitor that described power supply at random comprises and connects; Wherein, described low-power scm is connected with the signal output part of temperature sensor by universal serial bus; Described low-power scm is connected power supply by the I/O port with the power end of temperature sensor; Described wireless transmitter module is the Zigbee wireless communication module; Described low-power scm is connected through the signal input part of universal serial bus with the Zigbee wireless communication module; At random between power supply and the Zigbee wireless communication module power end, electronic switching circuit is set; The control end of described electronic switching circuit is connected with the I/O end of low-power scm.
Its described radio temperature sensor is fixed on the surface of cable splice or cable termination through insulation heat-conducting glue bonding or the binding of high temperature band.
Concrete, described radio temperature sensor comprises the radio temperature sensor housing that has loam cake, the temperature sensor of described radio temperature sensor, low-power scm, wireless transmitter module are integrated on the wiring board, be fixed in the cavity of radio temperature sensor housing, power supply is arranged in the battery compartment at random, the wireless signal transmission antenna of wireless transmitter module is fixed on and covers, the temperature probe of temperature sensor is arranged on the bottom surface of radio temperature sensor, closely contacts with the surface of testee.
Concrete, described electronic switching circuit comprises switching tube D1, first, second output terminal of described switching tube D1 respectively with corresponding connection of power input of positive pole and the wireless transmitter module of lithium battery; The control end of described switching tube D1 is connected with the I/O port of low-power scm.
Compared with the prior art, the utility model has the advantages that:
1. adopt the data transfer mode of Zigbee wireless network, solve the reliable isolating problem of current potential of high-pressure side and low-voltage system;
2. adopt the power source design of lithium battery and storage capacitor, and whether enter duty by low-power scm control Zigbee wireless communication module, reduce power consumption by this to greatest extent, prolong the serviceable life of radio temperature sensor.
3. the output of radio temperature sensor is digital signal, the direct and cpu i/f by universal serial bus, and the sensor with respect to the output of analog quantitys such as thermopair, thermal resistance need not verification, need not to revise, so stabilization is high.
Description of drawings
Fig. 1 is the physical construction synoptic diagram of radio temperature sensor of the present utility model;
Fig. 2 is the electrical block diagram of the utility model radio temperature sensor.
2-1 is the radio temperature sensor housing among the figure, and 2-2 is loam cake, and 2-3 is the temperature probe of temperature sensor, and 2-4 is cavity, and 2-5 is battery compartment, and 2-6 is the wireless signal transmission antenna.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Among Fig. 1, radio temperature sensor comprises temperature sensor, low-power scm, wireless transmitter module and power supply at random, its temperature sensor, low-power scm, wireless transmitter module are integrated on the wiring board, be fixed among the cavity 2-4 of radio temperature sensor housing 2-1, power supply is arranged among the battery compartment 2-5 at random, the wireless signal transmission antenna 2-6 of wireless transmitter module is fixed on the loam cake 2-2, the temperature probe 2-3 of temperature sensor is arranged on the bottom surface of radio temperature sensor, closely contacts with the surface of testee.
The physical construction of its sensor housing adopts flame-resistant high-temperature-resistant PE plastics to make, and is made up of housing and cover plate, and perforate is in order to expose temp probe below the housing.
After the wiring board welding of sensor, the debugging well, be assemblied in the bottom of structure, guarantee that probe exposes from housing bottom.Carry out epoxy sealing then.After embedding is good, build loam cake, and through becoming final finished product after shielding processing, the insulation processing operation.
Digital temperature sensor is close to the placement of cable termination point for measuring temperature in the technical program, is used for the temperature of induction tested point, the temperature of super low-power consumption CPU timing acquiring temperature sensor, and by the outwards transmission wirelessly of Zigbee wireless transmitter module.
Among Fig. 2, described radio temperature sensor comprises temperature sensor S1, low-power scm U1, wireless transmitter module Z1 and power supply at random, lithium battery B1 and storage capacitor C1 that described power supply at random comprises and connects.
Wherein, described low-power scm is connected with the signal output part of temperature sensor by universal serial bus; Described low-power scm is connected power supply by the I/O port with the power end of temperature sensor; Described wireless transmitter module is the Zigbee wireless communication module; Described low-power scm is connected through the signal input part of universal serial bus with the Zigbee wireless communication module; At random between power supply and the Zigbee wireless communication module power end, be provided with electronic switching circuit; The control end of described electronic switching circuit is connected with the I/O end of low-power scm.
Itself and the lithium battery B1 that connects and the positive and negative electrode of storage capacitor C1 are respectively with the corresponding connection of positive and negative power input of low-power scm.
Its described electronic switching circuit comprises switching tube D1, first, second output terminal of described switching tube D1 respectively with corresponding connection of power input of positive pole and the wireless transmitter module of lithium battery; The control end of described switching tube D1 is connected with the I/O port of low-power scm.
In the technical program, single-chip microcomputer U1 is the core of this device, it is powered to temperature sensor by the I/O pin, and the real time temperature value by universal serial bus (SPI) reading temperature sensor, when the difference of the collection value of the temperature value that collects and last time during greater than setting value, single-chip microcomputer is by the on/off of I/O foot control switching tube D1 processed, by conducting D1(PMOS switching tube), thereby give Zigbee wireless communication module Z1 power supply, and by universal serial bus (SPI) temperature value is sent by wireless mode.
The main chip model is as follows:
B1 is lithium ion battery;
C1 is Surface Mount tantalum electric capacity, is used for providing big electric current in the T-time;
D1 is PMOS switch transistor T PS1100;
Z1 is SZ05-ZBEE series Zigbee wireless communication module;
U1 is the single-chip microcomputer PIC24F16KL402 of Microchip company;
S1 is the digital temperature sensor ADT7410 of ADI company.
The temperature sensor of native system adopts digital temperature sensor, because the output of sensor is digital signal, and the direct and cpu i/f by universal serial bus, sensor with respect to the output of analog quantitys such as thermopair, thermal resistance, need not verification, need not to revise, so stabilization is high.
About the ZigbBee module, the commercially available prod of a lot of maturations has been arranged now, common Zigbee transmission of wireless signals platform all is made up of one 8 or 16 s' single-chip microcomputer and Zigbee radio frequency chip.Along with the development of chip design, wireless singlechip has appearred at present, and be about to processor module and radio-frequency module and be integrated in the same chip.The CC2430 of Ti-Chipcon company is exactly so, and CC2430 is integrated Zigbee radio-frequency front-end, ROM and 8051 microcontrollers are in a chip, and size only is 7mm * 7mm, so just make device integration height, peripheral components seldom, profile is very little; Under reception and emission mode, current loss is lower than 27mA or 25mA respectively, and supports can reduce power consumption widely by four kinds of dormancy mechanisms; CC2430 is operated in the free frequency range of 2.4GHz, and chip price is cheaper, and use cost is very low, so CC2430 meets the designing requirement of Zigbee wireless data signal transmission network platform very much.
When the transmitting/receiving communication distance is nearer, also can select for use the low-cost low energy consumption RF such as CC1100 of Chipncon AS company to receive/send out chip.
Concrete principle of work and application circuit about various ZigBee modules, can be with reference to the product information of the production firm of each chip/module, it also can provide the standard application circuit of chip and the preferred parameter of respective element separately, so its further information is no longer narrated at this.
About the concrete structure of ZigBee wireless network module, also can (www.embedcontrol.com) go up related content in the ZigBee module ZICM2410 application and development guide with reference to " embedded industry control net ", no longer narrate at this.
During actual the use, by radio temperature sensor the temperature on cable splice or cable termination surface is monitored in real time, by the Zigbee cordless communication network temperature data is sent to radio communications gateway, radio communications gateway is collected the temperature of each monitoring point in the one's respective area nearby, realizes centralized collection, the forwarding of data; At the Centralized Monitoring center one central server is set, the data that its various channel modes that possess by the scene are collected each transformer station, box type transformer, subscriber station, and gather, realize real time data demonstration, history data store, report generation, history curve or SMS alarm function.
Because the temperature that the utility model is treated the monitoring point by radio temperature sensor is monitored, by radio communication temperature data is sent to communication gate, solved the reliable isolating problem of current potential of high-pressure side and low-voltage system, it can adapt to multiple networking mode and data transfer mode, compatible good to the available data transmission network can reduce the improvement expenses of available data transmission network; The output of radio temperature sensor is digital signal, the direct and cpu i/f by universal serial bus, and the sensor with respect to the output of analog quantitys such as thermopair, thermal resistance need not verification, need not to revise, so stabilization is high.
The utility model can be widely used in power system device status monitoring field.
Claims (4)
1. wireless temperature measurement sensor that is used for the online detection of cable termination is characterized in that:
Described radio temperature sensor comprises temperature sensor, low-power scm, wireless transmitter module and power supply at random, lithium battery and storage capacitor that described power supply at random comprises and connects;
Wherein, described low-power scm is connected with the signal output part of temperature sensor by universal serial bus; Described low-power scm is connected power supply by the I/O port with the power end of temperature sensor;
Described wireless transmitter module is the Zigbee wireless communication module;
Described low-power scm is connected through the signal input part of universal serial bus with the Zigbee wireless communication module;
At random between power supply and the Zigbee wireless communication module power end, electronic switching circuit is set;
The control end of described electronic switching circuit is connected with the I/O end of low-power scm.
2. according to the described wireless temperature measurement sensor for the online detection of cable termination of claim 1, it is characterized in that described radio temperature sensor is fixed on the surface of cable splice or cable termination through insulation heat-conducting glue bonding or the binding of high temperature band.
3. according to the described wireless temperature measurement sensor for the online detection of cable termination of claim 1, it is characterized in that described radio temperature sensor comprises the radio temperature sensor housing that has loam cake, the temperature sensor of described radio temperature sensor, low-power scm, wireless transmitter module is integrated on the wiring board, be fixed in the cavity of radio temperature sensor housing, power supply is arranged in the battery compartment at random, the wireless signal transmission antenna of wireless transmitter module is fixed on and covers, the temperature probe of temperature sensor is arranged on the bottom surface of radio temperature sensor, closely contacts with the surface of testee.
4. according to the described wireless temperature measurement sensor for the online detection of cable termination of claim 1, it is characterized in that described electronic switching circuit comprises switching tube D1, first, second output terminal of described switching tube D1 respectively with corresponding connection of power input of positive pole and the wireless transmitter module of lithium battery; The control end of described switching tube D1 is connected with the I/O port of low-power scm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320139027.XU CN203132708U (en) | 2013-03-25 | 2013-03-25 | Wireless temperature measurement sensor used for on-line detection of cable termination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320139027.XU CN203132708U (en) | 2013-03-25 | 2013-03-25 | Wireless temperature measurement sensor used for on-line detection of cable termination |
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| CN203132708U true CN203132708U (en) | 2013-08-14 |
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| CN201320139027.XU Expired - Lifetime CN203132708U (en) | 2013-03-25 | 2013-03-25 | Wireless temperature measurement sensor used for on-line detection of cable termination |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104112349A (en) * | 2014-06-06 | 2014-10-22 | 辽宁立德电力电子股份有限公司 | High-voltage cable connector wireless temperature measuring apparatus |
| CN104627890A (en) * | 2014-11-29 | 2015-05-20 | 于磊 | Wireless stop limit device with height warning function |
| CN105336141A (en) * | 2015-11-04 | 2016-02-17 | 王亲武 | Intelligent wireless temperature measurement system based on Zigbee technology |
| CN105355017A (en) * | 2015-11-04 | 2016-02-24 | 王亲武 | Zigbee technology-based intelligent wireless temperature measurement terminal |
| CN106441600A (en) * | 2016-08-24 | 2017-02-22 | 西安远眺卫星通信有限公司 | Wireless temperature monitoring system and wireless temperature monitoring method based on communication satellite |
| CN106768412A (en) * | 2016-12-31 | 2017-05-31 | 东阳市光明电力建设有限公司 | The passive type cable temperature monitoring device of long-distance transmissions |
-
2013
- 2013-03-25 CN CN201320139027.XU patent/CN203132708U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104112349A (en) * | 2014-06-06 | 2014-10-22 | 辽宁立德电力电子股份有限公司 | High-voltage cable connector wireless temperature measuring apparatus |
| CN104627890A (en) * | 2014-11-29 | 2015-05-20 | 于磊 | Wireless stop limit device with height warning function |
| CN104627890B (en) * | 2014-11-29 | 2017-06-09 | 于磊 | A kind of height of antenna alarm limit stop device |
| CN105336141A (en) * | 2015-11-04 | 2016-02-17 | 王亲武 | Intelligent wireless temperature measurement system based on Zigbee technology |
| CN105355017A (en) * | 2015-11-04 | 2016-02-24 | 王亲武 | Zigbee technology-based intelligent wireless temperature measurement terminal |
| CN106441600A (en) * | 2016-08-24 | 2017-02-22 | 西安远眺卫星通信有限公司 | Wireless temperature monitoring system and wireless temperature monitoring method based on communication satellite |
| CN106768412A (en) * | 2016-12-31 | 2017-05-31 | 东阳市光明电力建设有限公司 | The passive type cable temperature monitoring device of long-distance transmissions |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |