CN217545677U - Cable intermediate head embeds temperature measurement system based on electromagnetic resonance - Google Patents
Cable intermediate head embeds temperature measurement system based on electromagnetic resonance Download PDFInfo
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- CN217545677U CN217545677U CN202220155593.9U CN202220155593U CN217545677U CN 217545677 U CN217545677 U CN 217545677U CN 202220155593 U CN202220155593 U CN 202220155593U CN 217545677 U CN217545677 U CN 217545677U
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Abstract
The utility model discloses a built-in temperature measurement system of cable intermediate head based on electromagnetic resonance mainly carries out the direct measurement to cable intermediate head's conductor temperature. The temperature measuring system comprises a wireless passive flexible temperature sensor, a control circuit and interactive upper computer software. The control circuit comprises an external reading module, a signal transceiving module, an external circuit temperature and humidity reading module, a positioning module and a GSM/GPRS module. The flexible wireless passive temperature sensor is tightly attached to the outside of the conductor connecting pipe and clamped between the inner insulating layer and the conductor connecting pipe, the characteristic frequency of the sensor is detected by electromagnetic coupling, and then the temperature of the conductor of the cable joint is obtained according to the corresponding relation between the characteristic frequency and the temperature. An inductance coil of the flexible wireless passive temperature sensor is arranged in the center of the induction coil, and the induction coil is connected with the control circuit. The external circuit temperature and humidity reading module senses the temperature and humidity of the whole control circuit, and the safety of the circuit is guaranteed. The positioning module is used for accurately positioning the cable connector, so that the maintenance work is convenient to carry out. The scheme can timely and accurately monitor the temperature of the conductor of the cable joint and the running state of the temperature measuring system, and improves the power supply reliability.
Description
Technical Field
The utility model belongs to the technical field of the temperature measurement and specifically relates to a built-in temperature measurement system of cable intermediate head based on electromagnetic resonance.
Background
Along with the development of the national power internet of things, various electrical equipment is continuously upgraded, the temperature is an important characteristic of whether the electrical equipment is in a normal working state, whether the electrical equipment operates in the normal state is judged through real-time monitoring of the working temperature of the key part of the electrical equipment, the operating state of the electrical equipment can be timely mastered, the operating state of the whole system is further judged, and more dangerous accidents are avoided. For high-voltage cables, the joint is a key heating and fault hidden point, so that real-time monitoring of the temperature of the middle joint of the cable is necessary.
Aiming at the problems that the traditional temperature measuring optical fiber is arranged outside the cable skin or the shielding layer, can not be in direct contact with a conductor, can not be used for directly monitoring the running temperature state of a conductor core of a cable joint, can only monitor the temperature condition on the surface of the cable or outside the insulating layer, and can not react to the severe temperature change inside the cable joint in time, the problem that the internal space of the cable middle joint is extremely narrow is considered, so that the strict requirement on the size of a sensor is met, in addition, the strong electromagnetic field environment is arranged inside the cable middle joint, the stability of the sensor is a problem, and meanwhile, the electrical performance and the running reliability of the cable joint are required to be not influenced; based on above problem, the utility model discloses a built-in temperature measurement system of cable intermediate head based on electromagnetic resonance mainly carries out the direct measurement to cable intermediate head's conductor temperature.
This temperature measurement system includes wireless passive flexible temperature sensor, control circuit and interactive host computer software, and control circuit reads the coil through external and sends the frequency sweep signal to wireless passive flexible temperature sensor, utilizes the characteristic frequency of electromagnetic resonance return circuit and the corresponding relation of temperature, directly reads cable joint inner conductor temperature, assists with orientation module, realizes the accurate positioning to the cable joint position, and subsequent maintenance of being convenient for is simple high-efficient. Meanwhile, the temperature and humidity information of the control circuit is sent to the interactive upper computer software by an external circuit temperature and humidity reading module of the control circuit, so that the performance state of the control circuit is monitored in real time, and the running safety and stability of the whole temperature measuring system are ensured.
The invention aims to build a temperature detection system for power equipment, realizes direct monitoring of the temperature of the conductor in the cable joint, and can provide guidance and help for early warning, operation, maintenance, repair and arrangement and fault analysis of the cable joint fault.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a built-in temperature measurement system, which comprises a flexible wireless passive temperature sensor, a control circuit and interactive upper computer software; the control circuit comprises an external reading module, a signal transceiving module, an external circuit temperature and humidity reading module, a positioning module and a GSM/GPRS module, wherein the flexible wireless passive temperature sensor is tightly attached to the outside of the conductor connecting pipe and clamped between the inner insulating layer and the conductor connecting pipe, an inductance coil of the flexible wireless passive temperature sensor is arranged at the center of the induction coil, and the induction coil is connected with the control circuit. The temperature measurement system can realize the direct detection function of the temperature of the cable joint and the accurate positioning function of the cable joint, improves the maintenance efficiency, has the advantages of simple installation and lower cost, and meets the actual operation requirement.
The utility model supports the positioning of the cable joint and uses the E108-GN02D module; E108-GN02D is a high integration level, low-power consumption, low-cost multimode satellite positioning navigation module, compatible GPS and big dipper positioning system, the radio frequency baseband antenna integrated design has been adopted, and reduce the problem that temperature and electromagnetic interference influence stability through circuit design, realize the accurate positioning to cable joint, grasp cable joint's distribution situation in real time, the temperature information of cooperation cable joint conductor, can be rapid when appearing fixing a position and the trouble is first screened cable joint, large-scale troubleshooting work has been avoided, time is saved, the work load is reduced, and the overhaul efficiency is improved.
The utility model provides a to the detection function of temperature measurement system's security, DHT11 temperature and humidity sensor is selected to the scheme, has realized in time mastering temperature measurement circuit's operation situation to control circuit's humiture perception, sends control circuit's humiture information to interactive host computer software simultaneously, realizes the real-time supervision to control circuit performance state, guarantees security and the stability of whole temperature measurement system operation.
The utility model provides a built-in temperature measurement system of cable intermediate head based on electromagnetic resonance, which has the advantages that the temperature of the conductor in the cable intermediate head can be directly measured; data communication between the temperature measuring device and the interactive upper computer software is realized through the GSM/GPRS module by the SIM800C in cooperation with the SIM card, data are firstly transmitted to the cloud server and then are directly transmitted to the interactive upper computer software through the cloud, short-distance intermediate communication means such as WiFi or Bluetooth are not needed, a local area network is not needed to be built, and the defects of local area network communication are overcome.
The following detailed description of the preferred embodiments refers to the accompanying drawings.
Drawings
1. FIG. 1 is a system block diagram of a cable intermediate joint temperature measuring device based on electromagnetic resonance.
2. Fig. 2 is a schematic cross-sectional structural view of a cable intermediate joint temperature measuring device based on electromagnetic resonance, which is mounted on a cable intermediate joint.
3. Fig. 3 is a schematic diagram illustrating data transmission between the reading circuit and the interactive upper computer software.
4. Fig. 4 is a schematic diagram of the inductor and the capacitor.
5. Fig. 5 is a schematic cross-sectional view of the inductor and the capacitor shown in fig. 4.
6. Fig. 6 is a schematic cross-sectional structural view of the wireless passive flexible temperature sensor in fig. 1.
7. Fig. 7 is a block diagram of a temperature and humidity monitoring system of an external circuit of the temperature measuring system.
8. Fig. 8 is a schematic diagram of the signal generation and transceiver module in the control circuit.
9. Fig. 9 is a schematic diagram of a positioning module in the control circuit.
Detailed Description
To further explain the technical solutions adopted by the present invention to achieve the intended purpose of the invention, the following detailed description is made with reference to the accompanying drawings and preferred embodiments:
as shown in fig. 1, the temperature measuring system based on electromagnetic resonance of the present embodiment includes a wireless passive flexible temperature sensor, a control circuit, and an interactive upper computer software; the control circuit comprises an external reading module, a signal transceiving module, an external circuit temperature and humidity reading module, a positioning module and a GSM/GPRS module. The utility model provides a cable joint temperature measurement system based on electromagnetic resonance circuit can all have good adaptability to the cable joint of multiple model.
FIG. 1 is a system block diagram of a specific circuit implementation of a temperature measuring device; the external induction coil is an external reading module, and the external reading module is directly connected with the signal transceiving module through a lead.
Fig. 2 shows a schematic diagram of a temperature measuring device for a cable intermediate joint based on an electromagnetic resonance circuit according to a first embodiment of the present invention at a cable joint working portion, an external insulating layer 11, a shielding layer 13 disposed between an internal insulating layer 12 and an external insulating layer 15, and a conductor connecting pipe 14 connecting two cable ends. In this embodiment, the wireless passive flexible temperature sensor 30 is wound outside the conductor connecting pipe 14 and is sandwiched between the inner insulating layer 12 and the shielding layer 13; on one hand, the structure of the wireless passive flexible temperature sensor can be changed according to the size of the inner space of the shielding layer 13, and the wireless passive flexible temperature sensor can be fixed only by winding the wireless passive flexible temperature sensor outside the conductor connecting pipe 14, so that the wireless passive flexible temperature sensor has better adaptability to cable connectors of different models of different manufacturers; on the other hand, the wireless passive flexible temperature sensor can be closer to the conductor connecting pipe 14, so that heat conduction is facilitated, and temperature measurement is more accurate; in addition, the position setting mode of clamping between internal insulation layer 12 and conductor connecting pipe 14, the installation is more convenient, and can also make wireless passive flexible temperature sensor more closely to control circuit's signal transceiver module 20, makes the signal received more accurate.
Fig. 3 is a schematic block diagram of a communication mode between the temperature measuring device and the interactive upper computer software, based on the GSM/GPRS module, the scheme selects the SIM800C8 to cooperate with the SIM card, and transmits data to the cloud server first, and then directly transmits the data to the interactive upper computer software through the cloud; compared with the traditional short-distance intermediate communication technology such as WiFi or Bluetooth and the like, the remote communication technology is matched, data are directly transmitted to the interactive upper computer software through the cloud server, the data are directly and rapidly transmitted, intermediate short-distance communication and consumption of a large amount of local data storage time and resources are not needed, real-time display and real-time detection are achieved, errors in data secondary transmission are reduced, a large amount of local storage space is saved, secondary transmission is not needed, and a local area Internet of things is not needed to be built.
Fig. 4 is a schematic diagram of the structure of the inductor and the capacitor, which is formed by connecting 211 a capacitor and 212 a capacitor.
As shown in fig. 5, in this embodiment, the induction coil 313 is arranged in a planar spiral shape, the capacitor 311 is disposed at the center of the planar spiral induction coil 313, the plane where the plate of the capacitor 311 is located is parallel to the extending direction where the wireless passive flexible temperature sensor 30 is located, and when the wireless passive flexible temperature sensor 30 is wound on the conductor connecting pipe 14, one plate of the capacitor 311 can be disposed close to the conductor connecting pipe 14. An intermediate medium 312 is also disposed between the two plates of the capacitor 311, and the intermediate medium 312 may be an intermediate medium 312 formed of a temperature sensitive dielectric material to increase the response sensitivity of the capacitor 311 to temperature.
Fig. 6 is a schematic cross-sectional structure view of the wireless passive flexible temperature sensor in fig. 1, and as shown in fig. 6, the wireless passive flexible temperature sensor 30 includes a protective layer 32 in addition to the LC circuit 31, in this embodiment, the wireless passive flexible temperature sensor 30 may be in a sheet shape and is wound around and fixed on the conductor connecting pipe 14 during installation.
Fig. 7 is a block diagram of a temperature and humidity monitoring system of an external circuit of a temperature measurement system, and DHT11 temperature and humidity sensors are selected according to a scheme, so that temperature and humidity sensing of a control circuit is realized, that is, the operating condition of the control circuit can be known, real-time monitoring of the performance state of the temperature measurement circuit and early warning of equipment damage are realized, and the safety of the whole temperature measurement system is further ensured.
Fig. 8 is a schematic diagram of a signal generating and transceiving module in a control circuit. The signal transceiver module is characterized in that an AD9833 is used as a core chip, a sweep frequency signal generated by the signal transceiver module is amplified by an LM358 and LM6172 amplifier with low noise, low power consumption and high precision, and the common effect of other capacitance resistors is matched to realize the signal transceiver control; controlling the frequency, waveform and amplitude of the transmitted signal and the time interval of the received signal, and simply amplifying the received signal and then sending the amplified signal to a controller; the comprehensive economical and practical angle selection Enzhipu Kinetis EA series microcontroller, as many as 16-channel 12-bit high-precision ADC, does not need external high-precision ADC expansion, so that fewer components are used in a scheme external circuit, a signal flowing line is shorter, introduced noise is less, energy consumption is less, and comprehensive performance is more excellent; the cable joint has excellent electromagnetic compatibility (EMC) and is suitable for the strong magnetic field environment of the cable joint; compared with the AD9850 selected by the traditional DDS module, when the same sine frequency sweeping signal within 10M is realized, compared with the AD9850, the AD9833 can directly change the amplitude through programming, an additional circuit is not needed, the complexity of equipment is reduced, the price is lower, the programming is simple, and the debugging is easy.
FIG. 9 is a schematic diagram of a positioning module in the control circuit, with the option of the E108-GN02D module. E108-GN02D is a multimode satellite positioning navigation module of a section high integration degree, low-power consumption, low cost, compatible GPS and big dipper positioning system, radio frequency baseband antenna integrated design has been adopted, and reduce the problem that temperature and electromagnetic interference influence its stability through circuit design, realize the accurate positioning to cable joint, can master cable joint's distribution situation in real time, the temperature information of cooperation cable joint conductor, can be rapid when appearing fixing a position and the fault prescreening to cable joint, large-scale troubleshooting work has been avoided, time saving, the work load has been reduced, and the maintenance efficiency is improved.
To sum up, in this embodiment, the signal transceiver module of the control circuit generates a sine frequency-sweeping signal, which is amplified by the amplifier, and then the received signal is simply amplified by cooperating with the multi-path relay and other capacitive resistors and then sent to the controller; the control circuit transmits the sweep frequency signal to the wireless passive flexible temperature sensor through an external reading coil, and directly reads the temperature of the conductor in the cable joint by utilizing the corresponding relation between the characteristic frequency and the temperature of the electromagnetic resonance circuit; selecting an SIM800C8 module to match with an SIM card, directly transmitting data to a cloud server, and then directly transmitting the data to interactive upper computer software through a cloud so as to monitor the temperature of a conductor in a cable joint in real time; the cable connector is accurately positioned by the aid of the positioning module, so that subsequent maintenance work is facilitated; meanwhile, the external circuit temperature and humidity reading module of the control circuit sends temperature and humidity information of the control circuit to the interactive upper computer software, so that the performance state of the control circuit is monitored in real time, and the operation safety and stability of the whole temperature measuring system are guaranteed.
Claims (5)
1. The utility model provides a built-in temperature measurement system of cable intermediate head based on electromagnetic resonance which characterized in that: the built-in temperature measurement system comprises a flexible wireless passive temperature sensor, a control circuit and interactive upper computer software; the control circuit comprises an external reading module, a signal transceiving module, an external circuit temperature and humidity reading module, a positioning module and a GSM/GPRS module, wherein the flexible wireless passive temperature sensor is tightly attached to the outside of the conductor connecting pipe and clamped between the inner insulating layer and the conductor connecting pipe, an inductance coil of the flexible wireless passive temperature sensor is arranged in the center of the induction coil, and the induction coil is connected with the control circuit.
2. The electromagnetic resonance-based cable intermediate joint built-in temperature measurement system according to claim 1, characterized in that: the signal receiving and transmitting module of the control circuit is an AD9833 module, and is controlled by a Kinetis EA series microcontroller of Enzhipu.
3. The electromagnetic resonance-based cable intermediate joint built-in temperature measurement system according to claim 1, characterized in that: the GSM/GPRS module realizes data communication between the interactive upper computer software and the flexible wireless passive temperature sensor by matching SIM800C with an SIM card.
4. The electromagnetic resonance-based cable intermediate joint built-in temperature measurement system according to claim 1, characterized in that: the external circuit temperature and humidity reading module is a digital temperature and humidity sensor based on DHT11 as a core.
5. The electromagnetic resonance-based cable intermediate joint built-in temperature measurement system according to claim 1, characterized in that: the positioning module uses a high-precision low-cost E108-GN02D module and is compatible with a GPS and a Beidou positioning system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220155593.9U CN217545677U (en) | 2022-01-20 | 2022-01-20 | Cable intermediate head embeds temperature measurement system based on electromagnetic resonance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220155593.9U CN217545677U (en) | 2022-01-20 | 2022-01-20 | Cable intermediate head embeds temperature measurement system based on electromagnetic resonance |
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| CN217545677U true CN217545677U (en) | 2022-10-04 |
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| CN202220155593.9U Active CN217545677U (en) | 2022-01-20 | 2022-01-20 | Cable intermediate head embeds temperature measurement system based on electromagnetic resonance |
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