CN216899352U - Cable conductor temperature measuring device - Google Patents
Cable conductor temperature measuring device Download PDFInfo
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- CN216899352U CN216899352U CN202220696977.1U CN202220696977U CN216899352U CN 216899352 U CN216899352 U CN 216899352U CN 202220696977 U CN202220696977 U CN 202220696977U CN 216899352 U CN216899352 U CN 216899352U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
A cable conductor temperature measuring device is composed of a temperature sensor, a reading antenna, a control circuit, cloud platform monitoring software and a positioning module. The temperature sensor is attached to the cable conductor in a sensing mode of a resonant circuit. And a signal transceiver module in the control circuit sends a sweep frequency signal to the reading antenna, so that the reading antenna and the resonant circuit generate inductive coupling, the signal transceiver module receives a characteristic value fed back by the resonant circuit, and the temperature of the cable conductor is obtained through the corresponding relation between the characteristic value and the temperature. The temperature information is transmitted to the cloud platform monitoring software through the wireless transmission module, and real-time display of the temperature is achieved. The temperature and humidity reading module is placed in the control circuit, the surrounding environment state of the control circuit is monitored, and the damage of the control circuit caused by abnormal temperature or humidity is pre-warned. Through the positioning module, the abnormal temperature position of the cable is positioned, and the maintenance efficiency is improved.
Description
Technical Field
The utility model relates to the field of temperature measurement, in particular to a cable conductor temperature measuring device.
Background
Along with the improvement of the modern industrialization degree and the rapid development of the national power internet of things, the voltage grade of electrical equipment is continuously improved, the working current is also continuously increased, the demand of people on electricity is higher and higher, the phenomenon of heating and damage of the electrical equipment is more serious, and the temperature is the most obvious characteristic for detecting whether the electrical equipment normally works. Therefore, the temperature of key parts of the electrical equipment is detected to judge whether the equipment is in a healthy state. When the temperature is abnormal, the maintenance can be carried out in time, thereby avoiding larger faults. Therefore, real-time detection of the temperature of the key parts of the electrical equipment is necessary.
For high voltage cables, the cable conductor is the location of critical heating and failure. Therefore, for monitoring the temperature of the cable conductor, a sensor is required to be capable of directly contacting the inner core conductor, so that the temperature of the conductor can be monitored with higher precision. Due to the extremely small space inside the cable, there is a great demand for the design of the sensor dimensions. Meanwhile, the cable is in a strong electromagnetic field environment, so that the designed sensor is not influenced by the distribution of an internal electric field. The service life of the cable is generally 30 years, so the service life of the built-in sensor is not less than 30 years. Based on the problems, the utility model discloses a cable conductor temperature measuring device.
The temperature measurement system comprises a temperature sensor, a reading antenna, a control circuit, cloud platform monitoring software and a positioning module. A signal receiving and transmitting module in the control circuit transmits a frequency sweeping signal to the resonant sensor through the reading antenna, and the temperature of the cable conductor is directly read by utilizing the corresponding relation between the characteristic value of the loop and the temperature, so that the real-time monitoring of the temperature is realized. Meanwhile, the temperature and humidity reading module of the control circuit transmits the temperature and humidity information of the control circuit to the cloud platform monitoring software, so that the performance state of the control circuit is displayed in real time, and the control circuit is early warned to be damaged. Through the positioning module, realize the location to the unusual department of cable temperature, facilitate for follow-up maintenance.
SUMMERY OF THE UTILITY MODEL
Based on the above, the utility model provides a cable conductor temperature measuring device, which comprises a temperature sensor, a reading antenna, a control circuit, cloud platform monitoring software and a positioning module, wherein the temperature sensor is attached to a cable conductor and used for measuring the temperature of the cable conductor, the reading antenna and the temperature sensor are located in the same section and used for obtaining the measured value of the temperature sensor, and the control circuit is located outside the cable and is in wired connection with the reading antenna and used for transmitting a frequency sweeping signal to the temperature sensor.
The temperature sensor is composed of a temperature-sensitive substrate, a resonant circuit and a protective layer. The temperature sensor is formed by manufacturing a resonance circuit on a temperature-sensitive substrate and attaching a protective layer on the surface of the circuit, and the temperature sensor is tightly attached to a cable conductor. The signal transceiver module enables the reading antenna and the resonant circuit to generate inductive coupling by sending a frequency sweeping signal, and receives a characteristic value signal fed back by the resonant circuit, and the control circuit obtains the temperature of the cable conductor according to the characteristic value received by the signal transceiver module.
The temperature-sensitive substrate is polyethylene terephthalate.
In order to improve the measurement accuracy, it is preferable that the characteristic value is a Q value.
A resonant circuit in the temperature sensor adopts an upper polar plate type capacitor, a lower polar plate type capacitor and a plane spiral inductor. In order to make the inductance value as large as possible on the substrate, a multilayer spiral inductor mode is adopted. And after the capacitor is coated with the insulating protection layer, two layers of inductors are manufactured above the capacitor, the rotation directions of the two layers of inductors are the same, a protection layer is coated outside the resonant circuit, and the inductor and the capacitor are connected in series in a through hole mode. This not only achieves a larger inductance value, but also protects the circuit with more protective layers, while making the sensor smaller in size. Finally, the lower pole plate of the capacitor is attached to the cable conductor, the inductor is located in the plurality of protective layers, and therefore the sensor can be prevented from being damaged due to the fact that the inductor is directly attached to the cable conductor for a long time, and the service life of the sensor is prolonged.
In order to improve the measurement sensitivity, it is preferable that the resonance circuit in the temperature sensor employs an LC resonance circuit.
The reading antenna is composed of a plurality of turns of coils, and the reading antenna is connected with the signal receiving and transmitting module through a lead.
The control circuit comprises a signal transceiving module, a temperature and humidity reading module, a microcontroller and a wireless transmission module.
The signal transceiving module adopts an AD9833 chip. The signal receiving and transmitting module is controlled by the microcontroller, transmits the frequency sweeping signal to the reading antenna and receives the feedback signal.
The temperature and humidity reading module adopts an HDC1080 temperature and humidity sensor, and the HDC1080 temperature and humidity sensor is a digital humidity sensor with an integrated temperature sensor and is used for detecting the temperature and humidity of the control circuit and early warning the damage of the control circuit.
The wireless transmission module adopts a SIM800C module. The SIM800C module is a GSM/GPRS module, realizes data communication between the temperature measuring device and the cloud platform monitoring software through the SIM800C module and the SIM card, transmits data to a cloud server firstly, and then directly transmits the data to the cloud platform monitoring software through the cloud.
The AD9833 chip of the signal transceiving module does not need an external element, the output frequency and the phase position can be programmed through software, the adjustment and the control are easy, and the AD9833 chip is matched with a low-power-consumption microcontroller and has the advantages of small size and low power consumption. HDC1080 temperature and humidity sensor can monitor temperature and humidity simultaneously and believeHas the advantages of low cost and low power consumption, and can be well combined with a microcontroller through I2And the C bus is in information transmission with the microcontroller. The wireless transmission module SIM800C is small in appearance, stable in performance, suitable for being applied to the surrounding environment of a cable, and more accurate in data transmission.
The microcontroller adopts an S9KEAZ64AMLH chip of Enzhipu Kinetis KEA series, has 12-bit SARADC with 16 channels, is a common structure for medium-to-high resolution application, and has the characteristics of low power consumption, small size and the like.
The cloud platform monitoring software is used for displaying the temperature of the cable conductor and the temperature and the humidity of the control circuit.
The model of the cloud platform monitoring software is built based on the PYQT, and all functions of the model are realized by a python program.
The positioning module is internally provided with a Bluetooth module and an ultra-wideband wireless communication module in the working table and the control circuit board. The positioning module adopts a DWM1000 module, a clock 63.9GHz in the DWM1000 module is used as a frequency source of the counter, namely, a counting time stamp corresponds to 15.65ps, the high distance measurement precision is achieved, and the positioning precision can reach centimeter level. The DWM1000 module communicates with the microcontroller through the SPI interface. After the connection is established to bluetooth in workstation and the control circuit board, open real-time range finding and seeking the function, the range finding is opened to UWB, and the distance and the simple directionality of the corresponding cable of workstation real-time display guide. Compared with the GPS, the UWB has extremely strong penetration capability and strong anti-interference energy, and the GPS positioning system can only work within the visual range of the GPS positioning satellite.
In summary, in the present invention, the signal transceiver module sends a sweep frequency signal to the reading antenna, the reading antenna is coupled to the resonant circuit, the signal transceiver module receives a signal with a characteristic value returned from the resonant circuit, and then transmits the signal to the microcontroller, and the temperature of the cable conductor is obtained through the relationship between the characteristic value and the temperature. Data communication between the temperature measuring device and the cloud platform monitoring software is achieved through the wireless transmission module, the temperature of a cable conductor is obtained in real time through the cloud platform monitoring software, early warning of faults can be achieved, meanwhile, the surrounding environment state of the control circuit can be observed on the cloud platform monitoring software in real time through the temperature and humidity sensor, the positioning of the abnormal cable temperature position is achieved through the positioning module, and the overhauling efficiency is improved.
The above description is a technical overview of the present disclosure, and the following detailed description is given for preferred embodiments with reference to the accompanying drawings.
Drawings
FIG. 1 is a block diagram of a cable conductor temperature measuring device according to the present invention
FIG. 2 is a schematic view of a cable conductor temperature measuring device installed inside a cable
FIG. 3 is a cross-sectional view of the temperature sensor of FIG. 2
FIG. 4 is a schematic diagram of the inductor and capacitor shown in FIG. 2
FIG. 5 is a block diagram of a control circuit system
FIG. 6 is a block diagram of a positioning module system
Detailed Description
To further explain the technical solutions adopted by the present invention to achieve the intended purpose of the utility model, the following detailed description is made with reference to the accompanying drawings and preferred embodiments:
fig. 1 is a block diagram of a cable conductor temperature measuring device according to the present invention. The temperature measurement system comprises a temperature sensor, a reading antenna, a control circuit and cloud platform monitoring software, wherein the control circuit comprises a signal receiving and transmitting module, a temperature and humidity reading module, a microcontroller and a wireless transmission module. The signal transceiver module adopts an AD9833 chip, the microcontroller controls the AD9833 chip to transmit sweep frequency signals, the temperature and humidity reading module adopts an HDC1080 temperature and humidity sensor, the wireless transmission module in the control circuit adopts an SIM800C module, and the microcontroller adopts an Enzhipu S9KEAZ64AMLH chip. Through coupling of the reading antenna and the temperature sensor, the signal transceiving module AD9833 receives a signal with Q value information returned by the temperature sensor, then transmits the signal to the microcontroller S9KEAZ64AMLH, and obtains the temperature of the cable conductor through the corresponding relation between the Q value and the temperature. The temperature and humidity sensor HDC1080 transmits the obtained signals to the microcontroller S9KEAZ64AMLH by sensing the surrounding environment, and the obtained temperature and humidity information is transmitted to cloud platform monitoring software through the wireless transmission module SIM800C for the real-time monitoring of personnel.
Fig. 2 is a schematic diagram of a cable conductor temperature measuring device installed inside a cable. The cable conductor 11 and the temperature sensor 12 are attached to the cable conductor 11 and located between the inner insulating layer 13 and the outer insulating layer 15, and the reading antenna 16 is located above the shielding layer 14 and located between the shielding layer 14 and the outer insulating layer 15 and both covered in the cable shell 17.
The reading antenna 17 generates electromagnetic coupling with the temperature sensor 12 through the frequency sweep signal transmitted by the signal transceiver module AD9833, thereby performing signal transmission. The reading antenna 16 and the temperature sensor 12 are separated by only one inner insulating layer 13, so that the signal transmission process is more stable.
The control circuit provided by the utility model is arranged outside the cable shell 17 and is connected with the reading antenna 16 through a lead.
Fig. 3 is a cross-sectional view of the temperature sensor of fig. 2. The temperature sensor 12 is composed of a capacitor 121, a temperature-sensitive material 126, a first inductor 123, a second inductor 122, a capacitor protection layer 127, an insulating protection layer 125 and a protection layer 124. The inductors 122 and 123 are placed right above the capacitor 121, the temperature-sensitive material 126 is placed between the upper and lower electrode plates of the capacitor 121, the protective layer 127 is coated outside the capacitor 121, the first inductor 123 is formed above the protective layer 127, the insulating protective layer 125 is coated above the first inductor 123, the second inductor 122 is formed above the insulating protective layer 125, and finally the protective layer 124 is coated outside the resonant circuit to protect the circuit, so that the resonant circuit is prevented from being damaged due to other influences.
The temperature-sensitive substrate provided by the utility model is polyethylene terephthalate.
The temperature sensor 12 provided by the utility model is of a sheet-shaped attaching type, can be directly attached to the cable conductor 11, is convenient for heat conduction, and can detect the temperature more accurately.
The magnetic flux of the temperature-sensitive material 126 in the middle layer of the capacitor 121 is obviously changed by the temperature, so that the inductance value is obviously changed, finally the Q value is changed, and the temperature is obtained by observing the corresponding relation between the Q value and the temperature.
Fig. 4 is a schematic diagram of the inductor and capacitor structure shown in fig. 2. The capacitor 121 is a parallel plate type, and the inductors 122 and 123 are planar spiral types.
Fig. 5 is a block diagram of control circuitry. The control circuit is arranged outside the cable shell 17, the signal transceiving module AD9833 is controlled by the microcontroller S9KEAZ64AMLH to transmit sweep frequency signals to the reading antenna 16, the reading antenna is coupled with the temperature sensor 12, the signal transceiving module AD9833 receives feedback signals and transmits the feedback signals to the microcontroller S9KEAZ64AMLH for processing, the temperature and humidity sensor HDC1080 senses the external environment condition of the control circuit, and the signals received from the outside are transmitted to the microcontroller S9KEAZ64AMLH for processing. The signals received by the microcontroller S9KEAZ64AMLH will be transmitted to the cloud platform monitoring software through the SIM800C module for display.
FIG. 6 is a block diagram of a system of location modules. The positioning module is internally provided with a Bluetooth module and a UWB module in a working table and a control circuit board. The UWB end of the control circuit board is in a dormant state when flat. After the connection is established to bluetooth in workstation and the control circuit board, open real-time range finding and seeking the function, the range finding is opened to UWB, and the distance and the simple directionality of the real-time display cable of workstation guide. When the cable breaks down, the cable can be positioned in time, so that the time is saved, and the maintenance efficiency is improved.
In summary, in the cable conductor temperature measuring device of the present invention, the signal transceiver module AD9833 is controlled by the microcontroller S9KEAZ64AMLH to transmit the sweep frequency signal to the reading antenna 16, so that the reading antenna 16 is coupled to the temperature sensor 12, the signal transceiver module AD9833 receives the returned signal with the Q value information, and after the signal is amplified by a series of circuits, the signal is transmitted to the microcontroller S9KEAZ64AMLH, and then is wirelessly transmitted to the cloud platform monitoring software through the SIM800C module. The temperature and humidity sensor HDC1080 receives the change of an external environment, transmits information to the microcontroller S9KEAZ64AMLH for processing, and finally transmits the information to cloud platform monitoring software. Simultaneously, Bluetooth and UWB modules are arranged in the working hand table and the control circuit board, and after Bluetooth at two ends is connected, the working hand table can accurately position the cable. The sensor adopts a resonant sensor, has small size and can be directly attached to the cable conductor, the temperature of the cable conductor is directly monitored, and the measured temperature is more accurate.
Claims (8)
1. The utility model provides a cable conductor temperature measuring device which characterized in that: the temperature sensor is attached to a cable conductor and used for measuring the temperature of the cable conductor, the reading antenna and the temperature sensor are located in the same section and used for obtaining the measured value of the temperature sensor, the control circuit is located outside the cable, is in wired connection with the reading antenna and transmits a frequency sweeping signal to the temperature sensor.
2. The cable conductor temperature measuring device of claim 1, wherein: the temperature sensor is composed of a temperature-sensitive substrate, a resonant circuit and a protective layer.
3. The cable conductor temperature measuring device of claim 2, wherein: the temperature-sensitive substrate is polyethylene terephthalate.
4. The cable conductor temperature measuring device of claim 1, wherein: and the temperature sensor and the reading antenna perform data transmission in an inductive coupling mode.
5. The cable conductor temperature measuring device of claim 1, wherein: the control circuit comprises a signal transceiving module, a temperature and humidity reading module, a microcontroller and a wireless transmission module.
6. The cable conductor temperature measuring device of claim 5, wherein: the signal transceiver module adopts the AD9833 chip, by microcontroller control AD9833 chip transmission frequency sweep signal, the humiture reads the module and adopts HDC1080 temperature and humidity sensor, wireless transmission module among the control circuit adopts the SIM800C module, microcontroller adopts the Anzhipu S9KEAZ64AMLH chip.
7. The cable conductor temperature measuring device of claim 1, wherein: the cloud platform monitoring software is used for displaying the temperature of the cable conductor and the temperature and the humidity of the control circuit.
8. The cable conductor temperature measuring device of claim 1, wherein: the positioning module consists of an ultra-wideband wireless communication device and a Bluetooth device, and adopts a DWM1000 module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220696977.1U CN216899352U (en) | 2022-03-28 | 2022-03-28 | Cable conductor temperature measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220696977.1U CN216899352U (en) | 2022-03-28 | 2022-03-28 | Cable conductor temperature measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216899352U true CN216899352U (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220696977.1U Active CN216899352U (en) | 2022-03-28 | 2022-03-28 | Cable conductor temperature measuring device |
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| CN (1) | CN216899352U (en) |
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- 2022-03-28 CN CN202220696977.1U patent/CN216899352U/en active Active
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