CN207423377U - Wireless temperature monitoring device with current sense function - Google Patents

Wireless temperature monitoring device with current sense function Download PDF

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Publication number
CN207423377U
CN207423377U CN201721590925.1U CN201721590925U CN207423377U CN 207423377 U CN207423377 U CN 207423377U CN 201721590925 U CN201721590925 U CN 201721590925U CN 207423377 U CN207423377 U CN 207423377U
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temperature
wireless
current
module
data
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CN201721590925.1U
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邵建国
殷建强
孙芝雨
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Changshu Switchgear Manufacturing Co Ltd
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Changshu Switchgear Manufacturing Co Ltd
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Abstract

The utility model discloses a kind of wireless temperature monitoring device with current sense function, including wireless temperature monitoring unit and one group of wireless temperature-measuring terminal;Wireless temperature-measuring terminal includes:Current transformer, temperature sensor, temperature signal regulation circuit, current signal conditioning circuit, wireless module, computing module;Current transformer is used to gather current signal and extracts electric energy from major loop;Extracted electric energy is converted to the power supply of adaptation by power circuit, is the consuming parts power supply in wireless temperature-measuring terminal;The temperature signal and the current signal that is gathered of current transformer of temperature sensor acquisition after temperature signal regulation circuit, current signal conditioning circuit respectively via being sent into computing module;Computing module calculates temperature data, current data according to temperature signal, current signal respectively, and passes through wireless module and be transferred to wireless temperature monitoring unit.The utility model can be monitored electric current while temperature data is obtained, so as to more accurately carry out fault verification.

Description

Wireless temperature monitoring device with current sense function
Technical field
The utility model is related to a kind of temperature monitoring device more particularly to a kind of wireless temperatures with current sense function Monitoring device.
Background technology
With the rapid development of economy, people increasingly increase the demand of electric power.It can largely be used in electric system disconnected Road device when occurring overloading in circuit or being short-circuit, causes circuit breaker trip to cut off supply line, so as to fulfill circuit protection. In long-term operational process, due to being influenced by load, aging, contact oxidation, tie point loosening etc., electric wire can be caused, connected Run in or the rise of device temperature, if processing may cause accident of power supply or even can burn power supply unit not in time, therefore It is necessary to the temperature to these positions to monitor in real time.Occur transmitting temperature detection using communication at present The wireless temperature monitoring device of data can reduce wiring quantity, improve security reliability.
However, existing wireless temperature monitoring device usually takes energy by battery or power supply power supply, there are high temperature for battery powered Danger, power supply power supply are and inconvenient to use there is also connecting reliable problem.In addition, existing wireless temperature monitoring device is usual The temperature of measuring point can only be detected, the actual temperature that can not obtain measuring point rises data, and the foundation when carrying out fault verification is not enough.
Utility model content
The technical problem to be solved by the utility model is to overcome the shortage of prior art, provide a kind of with current detecting The wireless temperature monitoring device of function, be not required battery or power supply power supply, and can while temperature data is obtained to electric current into Row monitoring, so as to more accurately carry out fault verification.
The utility model specifically solves above-mentioned technical problem using following technical scheme:
Wireless temperature monitoring device with current sense function, including wireless temperature monitoring unit and one group of wireless temperature measurement Terminal, wireless temperature-measuring terminal are communicated by communication with wireless temperature monitoring unit;The wireless temperature-measuring terminal Including:Current transformer, temperature sensor, temperature signal regulation circuit, current signal conditioning circuit, wireless module, calculating mould Block;The current transformer is used to gather current signal and extracts electric energy from major loop;Current transformer extracts electric energy and passes through Power circuit is converted to the power supply of adaptation, is the consuming parts power supply in wireless temperature-measuring terminal;The temperature of temperature sensor acquisition The current signal that signal and current transformer are gathered after temperature signal regulation circuit, current signal conditioning circuit respectively via sending Enter computing module;Computing module calculates temperature data, current data according to temperature signal, current signal respectively, and passes through nothing Wire module is transferred to wireless temperature monitoring unit.
Preferably, the wireless temperature monitoring unit includes environment temperature detection module, computing unit, wireless module, report Alert module;Environment temperature detection module is used to detect ambient temperature data;The computing unit is received by the wireless module The temperature data of wireless temperature-measuring terminal transmission, current data calculate actual temperature according to the temperature data and ambient temperature data Data are risen, maximum allowable Wen Sheng is calculated according to the current data, and judges whether to need through the report according to these data Alert module is alarmed.
Further, the wireless temperature monitoring unit further includes the communication module for communicating with host computer.Institute It is preferably RS485 buses or CAN bus communication module to state communication module.
Further, the wireless temperature monitoring unit further includes human-computer interaction module.
Preferably, the wireless module in wireless temperature monitoring unit and wireless temperature-measuring terminal is Zigbee wireless modules.
Compared with prior art, the utility model has the advantages that:
The utility model be not only able to detection line temperature, electric current can also be detected simultaneously, can easily by electric current with Temperature rises data and is compared, and finds the exception of electric power system in time, user is facilitated to solve failure as early as possible.The utility model utilizes electricity Also electric energy is extracted from major loop to use for temperature measurement terminal, need not use battery or power supply while current transformer detects electric current, Security reliability is more preferable, more compact structure.
Description of the drawings
Fig. 1 is the schematic block circuit diagram of wireless temperature-measuring terminal;
Fig. 2 is the schematic block circuit diagram of wireless temperature monitoring unit;
Fig. 3 is the circuit diagram of the first power circuit.
Fig. 4 is the circuit diagram of current signal conditioning circuit.
Fig. 5 is the circuit diagram of second source circuit.
Specific embodiment
The wireless temperature monitoring device of the utility model, including wireless temperature monitoring unit and one group of wireless temperature-measuring terminal, Wireless temperature-measuring terminal is communicated by communication with wireless temperature monitoring unit.The wireless temperature-measuring terminal includes: Current transformer, temperature sensor, temperature signal regulation circuit, current signal conditioning circuit, wireless module, computing module;Institute Current transformer is stated for gathering current signal and extracting electric energy from major loop;Current transformer extracts electric energy and passes through power supply electricity Road is converted to the power supply of adaptation, is the consuming parts power supply in wireless temperature-measuring terminal;Temperature sensor acquisition temperature signal and The current signal that current transformer is gathered calculates respectively via feeding after temperature signal regulation circuit, current signal conditioning circuit Module;Computing module calculates temperature data, current data according to temperature signal, current signal respectively, and passes through wireless module It is transferred to wireless temperature monitoring unit.The wireless temperature monitoring unit includes environment temperature detection module, computing unit, wireless Module, alarm module;Environment temperature detection module is used to detect ambient temperature data;The computing unit passes through the wireless mould Block receives temperature data, the current data that wireless temperature-measuring terminal is sent, and is calculated according to the temperature data and ambient temperature data Actual temperature rises data, calculates maximum allowable Wen Sheng according to the current data, and judges whether to need to pass through according to these data The alarm module is alarmed.
Fig. 1, Fig. 2 respectively illustrate the circuit of wireless temperature-measuring terminal and wireless temperature monitoring unit in a specific embodiment Functional block diagram.
As shown in Figure 1, the wireless temperature-measuring terminal in the present embodiment includes current transformer, the first microcontroller, temperature sensing Device, the first zigbee modules, the first power circuit, temperature signal regulation circuit, wherein current signal conditioning circuit, Current Mutual Inductance Device also extracts energy while current measurement signal is provided from major loop, passes through the power supply of the first power circuit generation adaptation For the consuming parts power supply in wireless temperature-measuring terminal, the current signal of current transformer acquisition is by current signal conditioning circuit The first microcontroller is sent into after reason to be sampled, and calculates the current value I in real-time busbar, the temperature letter of temperature sensor output Number the first microcontroller is sent into after temperature signal regulation processing of circuit is sampled, and calculates the temperature value To of temperature measuring point, and The real-time busbar current value I and temperature measuring point temperature value To signal transmissions that one Zigbee module calculates the first microcontroller are to wireless Temperature monitoring unit.
As shown in Fig. 2, wireless temperature monitoring unit in the present embodiment include second singlechip, the 2nd zigbee modules, Second source circuit, communication module, alarm lamp, warning output relay, key-press module, display module and environment temperature Sensor;Alternating current is converted into the working power needed for module by second source circuit, and second singlechip passes through the 2nd zigbee moulds Block receives busbar current value I and the temperature measuring point temperature signal value To that wireless temperature-measuring terminal is sent, while is sensed by environment temperature Device calculates ambient temperature Te, can also give these three signal transmissions to host computer (wherein, communication mould by communication module Block is preferably using RS485 buses or CAN bus communication standard), display module can show these three signals in real time, and alarm refers to Show that lamp and warning output relay can be according to the instruction output alarm signals of second singlechip.
The temperature sensor acquisition temperature measuring point temperature of wireless temperature-measuring terminal calculates to obtain temperature measuring point temperature To through the first microcontroller, Current transformer gathers current signal and calculates to obtain busbar electric current I through the first microcontroller, and the first Zigbee module is by the first microcontroller The busbar electric current I and temperature measuring point temperature To that calculate are transferred to the second singlechip of wireless temperature monitoring unit, wireless temperature prison The environment temperature sensor of control unit measures ambient temperature Te feeding second singlechips and passes through calculating with temperature measuring point temperature To The actual temperature of temperature measuring point can be obtained and rise T1, the temperature measuring point that corresponding busbar electric current I is obtained by calculation in second singlechip allows temperature limit T2, while wireless temperature monitoring unit periodically receives the temperature measuring point temperature To of each wireless temperature-measuring terminal, is calculated by some cycles Temperature measuring point mean temperature Tavg, meets one of following condition, then sends alarm by alarm lamp and warning output relay: The actual temperature of temperature measuring point, which rises T1≤temperature measuring point, allows temperature limit T2, and the actual temperature of temperature measuring point rises T1≤setting temperature and rises maximum of T max, Temperature measuring point temperature To- temperature measuring point mean temperatures Tavg>Δ T, Δ T are a setting value.
When breaker loading current works, by that will generate thermal energy when line bank or conducting wire, a portion passes through electric current The form of conduction, convection current and radiation is outwardly transferred, and another part then is allowed to heat up for heating conductor, so that Breaker and ambient temperature generate difference, and the difference of the two is exactly the Wen Sheng of breaker.At breaker and external cabling Maximum allowable temperature, which rises, is generally no more than 80K.
In order to save electric energy, extend service life of equipment, wireless temperature-measuring terminal is periodically uploaded to wireless temperature monitoring unit Busbar current value I and temperature measuring point temperature value To, periodic time may be set to such as 1 minute, 5 minutes, 10 minutes, 20 minutes, 30 points Clock etc..The environment temperature sensor of wireless temperature monitoring unit measures ambient temperature Te and is sent into second singlechip and temperature measuring point Temperature To is by calculating to obtain the actual temperature liter T1=To-Te of temperature measuring point.Corresponding busbar electric current I is obtained by calculation in second singlechip Temperature measuring point allow temperature limit T2, due to electrical equipments such as breakers, we are able to know that the specified temperature under rated current I1 Tw1 is risen, can obtain that the power of Wen Sheng at breaker connection and electric current is directly proportional, and relational expression is according to standard GB/T 25840:
Wherein, τwTo run Wen Sheng;τw1Wen Sheng during to load rated current;I is busbar electric current;I1For rated current;1.5 < p < 2.0 can use nominal value 1.67;
This makes it possible to obtain the calculation formula that temperature measuring point allows temperature limit T2:
Wireless temperature monitoring unit periodically receives the temperature measuring point temperature To of wireless temperature-measuring terminal, goes out by certain computation of Period Temperature measuring point mean temperature Tavg, some cycles can be 1 week such as 1 day, and the afternoon of January or the day before yesterday add posteriori morning such as This etc..
Meet one of following condition, then wireless temperature monitoring unit sends alarm:The actual temperature of temperature measuring point rises T1 and is more than or equal to Temperature measuring point allows temperature limit T2, and the actual temperature of temperature measuring point rises T1 and rises maximum of T max, temperature measuring point temperature more than or equal to setting temperature To- temperature measuring point mean temperatures Tavg is more than a setting value Δ T;Wherein, setting value Δ T can be the 5% of mean temperature Tavg Deng.And it cancels alarm when the actual temperature liter T1 of temperature measuring point is less than the 95% of temperature measuring point permission temperature limit T2 or temperature measuring point is real Border temperature, which rises, cancels alarm or temperature measuring point temperature To less than temperature measuring point average temperature when T1 rises the 95% of maximum of T max less than setting temperature Degree Tavg 95% when cancel alarm.Host computer can by communication module read current signal, temperature measuring point temperature signal and Ambient temperature signal, preferably using RS485 buses or CAN bus communication module, display module can be shown communication module in real time Show these three signals.Alarm lamp and warning output relay can be reported in output when it is more than setting value to select temperature measuring point temperature Alert signal.It can be used for setting by strong module, inquire about the data such as setting value.
Actual Wen Sheng referred to above, the calculating for allowing temperature limit etc. and set alert if are existing Mature technology, those skilled in the art can be adjusted according to actual needs completely.Circuit involved by the utility model can Using various available circuit structures.
Fig. 3 is the circuit diagram of the first power circuit in the present embodiment, as shown in figure 3, when major loop flows through electric current, electric current Mutual inductor output charges to capacitance C8 after rectifier bridge rectification, generates power supply VCC.When VCC is after R9, R10 partial pressure Value when being more than Vref, comparator N4A just exports control metal-oxide-semiconductor V1 electric discharge.When values of the VCC after R9, R10 partial pressure is less than During Vref, comparator N4A just controls Mos pipes V1 to close.So Xun Huan so that the voltage of VCC is maintained in certain scope.N4 For DC-DC chips, the purpose is to power supply VCC is converted to the power supply VCC1 that the circuits such as suitable microcontroller use.Wherein comparator For N4A preferentially using LM293, DC-DC chips preferentially use LM5007.
Fig. 4 shows the circuit diagram of current signal conditioning circuit in the present embodiment, as shown in figure 4, current transformer is defeated Go out and generate voltage signal on resistance R14, after the low-pass filter circuit formed by R15, C14, be sent by resistance R16, R17, The operational amplifier circuit of R18, amplifier N5A composition, generates the signal for being suitble to microcontroller sampling processing.Wherein amplifier N5A is preferentially used LM293。
Fig. 5 shows the circuit diagram of second source circuit in the present embodiment, and second source circuit is a switch power supply Road, the power supply that the generation of the power of alterating and direct current (AC85-265V DC90-270V) of input is used for other circuits such as microcontroller.Its Middle N1 is switching power source chip, it is preferred to use NCP1014;N2 is optocoupler, it is preferred to use PC817;T1 is switch transformer, preferably Using KB-13B.
In summary, the utility model can not only detect connecting part temperature and environment temperature, and can also detect in real time Electric current in circuit.It is compared so as to which electric current easily is risen data with temperature, finds the exception of electric power system, side in time Just user solves failure as early as possible.

Claims (6)

1. the wireless temperature monitoring device with current sense function, whole including wireless temperature monitoring unit and one group of wireless temperature measurement End, wireless temperature-measuring terminal are communicated by communication with wireless temperature monitoring unit;It is it is characterized in that, described wireless Temperature measurement terminal includes:Current transformer, temperature sensor, temperature signal regulation circuit, current signal conditioning circuit, wireless mould Block, computing module;The current transformer is used to gather current signal and extracts electric energy from major loop;Current transformer is extracted Electric energy is converted to the power supply of adaptation by power circuit, is the consuming parts power supply in wireless temperature-measuring terminal;Temperature sensor is adopted The current signal that the temperature signal and current transformer of collection are gathered is nursed one's health respectively via temperature signal regulation circuit, current signal Computing module is sent into after circuit;Computing module calculates temperature data, current data according to temperature signal, current signal respectively, And pass through wireless module and be transferred to wireless temperature monitoring unit.
2. device as described in claim 1, which is characterized in that the wireless temperature monitoring unit includes environment temperature and detects mould Block, computing unit, wireless module, alarm module;Environment temperature detection module is used to detect ambient temperature data;It is described to calculate list Member receives temperature data, the current data that wireless temperature-measuring terminal is sent by the wireless module, according to the temperature data and Ambient temperature data calculates actual temperature and rises data, and maximum allowable Wen Sheng is calculated according to the current data, and according to these data Judge whether to need to alarm by the alarm module.
3. device as claimed in claim 2, which is characterized in that the wireless temperature monitoring unit further include for host computer into The communication module of row communication.
4. device as claimed in claim 3, which is characterized in that the communication module is RS485 buses or CAN bus communication mould Block.
5. device as claimed in claim 2, which is characterized in that the wireless temperature monitoring unit further includes human-computer interaction module.
6. device as claimed in claim 2, which is characterized in that the wireless mould in wireless temperature monitoring unit and wireless temperature-measuring terminal Block is Zigbee wireless modules.
CN201721590925.1U 2017-11-24 2017-11-24 Wireless temperature monitoring device with current sense function Active CN207423377U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108955918A (en) * 2018-08-27 2018-12-07 广东电网有限责任公司 One kind being used for trolley type switch cabinet wireless temperature measurement system
CN109406004A (en) * 2018-09-18 2019-03-01 广东电网有限责任公司惠州供电局 A kind of switchgear temperature rise analytical method
CN109900387A (en) * 2019-03-15 2019-06-18 西门子电力自动化有限公司 For determining the method and apparatus of the alarm temperature rise threshold value of power equipment
CN110809034A (en) * 2019-10-23 2020-02-18 南京耐百特智能电气有限公司 Internet of things sensing module of electric power Internet of things system
CN111665402A (en) * 2019-03-05 2020-09-15 深圳昊喆物联网络科技有限公司 System and method for monitoring line aging of electric bicycle
CN112304360A (en) * 2019-08-02 2021-02-02 施耐德电器工业公司 Apparatus for measuring operating parameters of electronic device and measuring method thereof
CN112350264A (en) * 2020-10-10 2021-02-09 国网河北省电力有限公司石家庄供电分公司 Cable accessory temperature detection device and method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108955918A (en) * 2018-08-27 2018-12-07 广东电网有限责任公司 One kind being used for trolley type switch cabinet wireless temperature measurement system
CN109406004A (en) * 2018-09-18 2019-03-01 广东电网有限责任公司惠州供电局 A kind of switchgear temperature rise analytical method
CN111665402A (en) * 2019-03-05 2020-09-15 深圳昊喆物联网络科技有限公司 System and method for monitoring line aging of electric bicycle
CN109900387A (en) * 2019-03-15 2019-06-18 西门子电力自动化有限公司 For determining the method and apparatus of the alarm temperature rise threshold value of power equipment
CN112304360A (en) * 2019-08-02 2021-02-02 施耐德电器工业公司 Apparatus for measuring operating parameters of electronic device and measuring method thereof
CN110809034A (en) * 2019-10-23 2020-02-18 南京耐百特智能电气有限公司 Internet of things sensing module of electric power Internet of things system
CN112350264A (en) * 2020-10-10 2021-02-09 国网河北省电力有限公司石家庄供电分公司 Cable accessory temperature detection device and method

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