Cable joint intelligent protection cover based on wireless passive sensing

Abstract

The invention discloses a cable joint intelligent protection cover based on wireless passive sensing, and the protection cover comprises a protection cover, an access cable joint, an output cable joint, a sensing module, a heat dissipation module, a solar power module, a relay main control board, and a background supervision system. The output cable connector, the sensing module and the heat dissipation module are sequentially installed on the access cable connector and locked through nuts, the sensing module comprises a sensing main control board, a temperature sensor, a semiconductor thermoelectric power generation module and a mutual inductance power taking module, the semiconductor thermoelectric power generation module is located between the output cable connector and the heat dissipation module, and the temperature sensor is connected with the sensing main control board. And the solar power supply module supplies power to the sensing main control board through the mutual inductance power taking module. According to the cable joint intelligent protection cover based on wireless passive sensing, through a dual energy acquisition mechanism of self-power supply and mutual inductance power taking of the sensing module, automatic activation is realized, an alarm signal is sent out, and the real-time performance of monitoring data is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of cable joint online monitoring, and in particular to an intelligent protective cover for a cable joint based on wireless passive sensing. Background Art

[0002] After the cable is laid, in order to make it a continuous line, each section of the line must be connected as a whole. These connection points are called cable joints. The cable joint in the middle of the cable line is called the intermediate joint, and the cable joints at both ends of the line are called terminal heads. The cable joint is used to lock and fix the incoming and outgoing lines to make the line unobstructed, and by installing a protective cover on the cable joint, the insulation level of the cable joint is guaranteed to make it run safely and reliably. In recent years, it has been found that the connection problems of cable terminals have been increasing year by year, and most of them are accidents caused by heating of the cable connection parts.

[0003] Traditional outdoor distribution transformer high (low voltage) cable joint protection technology mainly relies on traditional physical protection methods, such as using insulating materials to wrap cable joints, and regular manual inspections to monitor the status of cable joints. For some protective covers with temperature sensors, although they can monitor the temperature changes of cable joints in real time, the protective covers often require external power or battery power, and transmit data to the background monitoring system via wired or wireless methods. This solution has many limitations, such as complex wiring of external power supplies, limited battery life, the need for regular replacement, and the inability to achieve continuous and high-frequency monitoring, resulting in insufficient real-time monitoring data.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an intelligent cable joint protective cover based on wireless passive sensing, which realizes automatic activation and sends out an alarm signal through the dual energy collection mechanism of self-powered and mutual power supply of the sensor module, thereby ensuring the real-time nature of the monitoring data.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The invention discloses an intelligent protective cover for a cable joint based on wireless passive sensing, comprising a protective cover, an access cable joint, an output cable joint, a sensor module, a heat dissipation module, a solar power module, a relay main control board and a background supervision system. The access cable joint is installed in the protective cover, and the output cable joint, the sensor module and the heat dissipation module are installed on the access cable joint in sequence and locked in position by a nut. The sensor module comprises a sensor main control board, a temperature sensor electrically connected to the sensor main control board, a semiconductor temperature difference power generation module, and a mutual inductance power supply module. The semiconductor temperature difference power generation module is located between the output cable joint and the heat dissipation module, and the heat generated by the output cable joint when a fault occurs and the temperature difference between the heat dissipation module are used to power the sensor main control board. The solar power module and the relay main control board are both installed on the protective cover, and the solar power module is electrically connected to the relay main control board. The solar power module supplies power to the sensor main control board through the mutual inductance power supply module. The sensor main control board and the background supervision system are both communicatively connected to the relay main control board.

[0008] Furthermore, a NB-IOT communication module is electrically connected to the relay main control board.

[0009] Furthermore, the mutual inductance power supply module includes an RFID transmitter electrically connected to the relay main control board and an RFID receiver electrically connected to the sensor main control board.

[0010] Furthermore, the surface of the semiconductor temperature difference power generation module is coated with thermal conductive glue.

[0011] Furthermore, the sensor module also includes a vibration sensor electrically connected to the sensor main control board.

[0012] Furthermore, the temperature sensor and the vibration sensor are both arranged close to the wall portion connected to the cable connector.

[0013] Furthermore, an insulator is sleeved on the access cable connector, one end of the insulator is located inside the protective cover, and the other end thereof extends outside the protective cover.

[0014] Furthermore, an insulating sleeve is sleeved on the output cable connector, one end of the insulating sleeve is located inside the protective cover, and the other end of the insulating sleeve extends outside the protective cover.

[0015] Furthermore, the protective cover is provided with ventilation holes.

[0016] Furthermore, the heat dissipation module includes a connecting plate, a vertical plate arranged on the connecting plate, and a plurality of fins arranged on the vertical plate. One end of the connecting plate is provided with a connecting hole connected to the access cable connector, and the other end of the connecting plate extends to the semiconductor temperature difference power generation module.

[0017] Beneficial effects:

[0018] The present invention provides a cable joint intelligent protective cover based on wireless passive sensing, which adopts wireless passive sensing technology and two self-powered modes of RFID electromagnetic induction power supply and semiconductor temperature difference power generation, so that the sensor module does not need to be powered by an external power supply, which is conducive to the sensor module to be able to work continuously or to be autonomously activated and send signals under specific conditions to ensure the real-time monitoring data. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of the intelligent protection cover for cable joints based on wireless passive sensing provided by the present invention;

[0020] Figure 2 A partial exploded view of the intelligent protective cover for cable joints based on wireless passive sensing provided by the present invention;

[0021] Figure 3 This is a schematic diagram of the circuit structure of the intelligent protective cover for cable joints based on wireless passive sensing provided by the present invention.

[0022] Figure markings: protective cover 1, ventilation hole 11 access cable connector 2, insulator 21, output cable connector 3, insulating sleeve 31, sensor module 4, sensor main control board 41, temperature sensor 42, semiconductor temperature difference power generation module 43, mutual inductance power supply module 44, RFID transmitter 441, RFID receiver 442, vibration sensor 45, heat dissipation module 5, connecting plate 51, vertical plate 52, fin 53, solar power module 6, relay main control board 7, background supervision system 8, nut 9, NB-IOT communication module 10. DETAILED DESCRIPTION

[0023] The present invention provides a cable joint intelligent protective cover based on wireless passive sensing. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] See also Figures 1 to 3As shown, the present invention provides a cable joint intelligent protective cover based on wireless passive sensing, including a protective cover 1, an access cable joint 2, an output cable joint 3, a sensor module 4, a heat dissipation module 5, a solar power module 6, a relay main control board 7 and a background supervision system 8, the access cable joint 2 is installed in the protective cover 1, the output cable joint 3, the sensor module 4 and the heat dissipation module 5 are installed on the access cable joint 2 in sequence, and the position is locked by a nut 9, the sensor module 4 includes a sensor main control board 41, and a temperature sensor 42 electrically connected to the sensor main control board 41, a semiconductor temperature difference power generation module Block 43, and mutual inductance power supply module 44, the semiconductor temperature difference power generation module 43 is located between the output cable connector 3 and the heat dissipation module 5, and the heat generated by the output cable connector 3 during fault heating and the temperature difference between the heat dissipation module 5 are used to power the sensor main control board 41, the solar power supply module 6 and the relay main control board 7 are both installed on the protective cover 1, the solar power supply module 6 is electrically connected to the relay main control board 7, the solar power supply module 6 supplies power to the sensor main control board 41 through the mutual inductance power supply module 44, and the sensor main control board 41 and the background supervision system 8 are both communicatively connected to the relay main control board 7.

[0025] The input cable connector 2 and the output cable connector 3 are connected to form a cable connector, and the protective cover 1 is sleeved on the cable connector to provide waterproof, dustproof and insulating insulation for the entire cable connector. Preferably, the protective cover 1 is made of a transparent, insulating material so that the staff can directly view the installation of the cable connector and various components through the protective cover 1.

[0026] The solar power module 6 converts solar energy into electrical energy and stores it in the solar power module 6, which supplies power to the relay main control board 7. When monitoring the temperature data of the cable joint, when the background monitoring system 8 issues an instruction or the preset reading time has arrived, that is, when it is necessary to read the sensor data such as the real-time temperature of the cable joint, the relay main control board 7 supplies power to the sensor main control board 41 through the mutual inductance power supply module 44, thereby activating the sensor main control board 41, and then sends an instruction to the temperature sensor 42, and the temperature sensor 42 monitors the temperature of the cable joint. After the sensor main control board 41 obtains the real-time temperature data, it transmits the data to the relay main control board 7, and the relay main control board 7 transmits the received data to the background monitoring system 8 through the communication connection. In addition, when the output cable connector 3 generates heat due to oxidation, rust, poor contact and other problems, the temperature of the lower end of the semiconductor temperature difference power generation module 43 (the end close to the output cable connector 3) is higher than the temperature of the upper end (close to the heat dissipation module 5), and the heat flows from the cable connector to the heat dissipation module 5, so that the semiconductor temperature difference power generation module 43 generates a thermal current, which provides additional power to the sensor main control board 41 after rectification to activate the sensor main control board 41, so that the sensor main control board 41 sends instructions to the temperature sensor 42, and the temperature sensor 42 monitors the temperature of the cable connector, ensuring that when the cable connector fails and generates heat, an alarm signal and real-time temperature data can be sent to the relay main control board 7 in time, and the relay main control board 7 transmits the data to the background supervision system 8 in time through the communication connection. Compared with the existing technology, the sensor main control board 41 is powered by mutual induction power supply technology to achieve regular monitoring of the temperature of the cable joint. No external power supply or battery is required, which can avoid complicated wiring and is suitable for a variety of complex scenarios. The semiconductor temperature difference power generation module 43 can provide additional power to the sensor main control board 41 when the cable joint fails and generates heat, so as to activate the sensor main control board 41, so that the alarm signal can be sent to the background supervision system 8 in time, so as to realize the immediate response to the cable joint failure, thereby improving the autonomous monitoring and fault warning capabilities.

[0027] In the above, the solar power module 6 includes solar cells, a power module and a storage battery. The solar cells convert solar energy into electrical energy and store it in the storage battery, providing a stable power supply for the relay main control board 7, eliminating the need for external power wiring operations and regular battery replacement operations.

[0028] In the above, the background monitoring system 8 can receive and process data from the sensor module 4 to provide functions such as real-time monitoring, historical data query, and alarm recording, which is beneficial for the staff to supervise the cable joints.

[0029] In a preferred embodiment, see Figure 1 , 3The relay main control board 7 is electrically connected to a NB-IOT communication module 10, and the NB-IOT communication module 10 is communicatively connected to the sensor main control board 41 and the background monitoring system 8 to receive real-time data and alarm signals from the sensor main control board 41, and transmit the information to the background monitoring system 8, thereby realizing remote monitoring of the cable connector connection status and fault warning, and improving the safety and maintenance efficiency of the cable system.

[0030] In a preferred embodiment, see Figure 1 , 3 The mutual induction power supply module 44 includes an RFID transmitter 441 electrically connected to the relay main control board 7 and an RFID receiver 442 electrically connected to the sensor main control board 41. The RFID transmitter 441 transmits electromagnetic energy to the RFID receiver 442 through electromagnetic induction, and the electromagnetic energy is converted into electrical energy to activate the sensor main control board 41, and then sends the designated sensor data. The sensor main control board 41 does not need an external power supply, and uses the mutual induction power supply method to power the sensor main control board 41, so that the sensor module 4 is a wireless passive module.

[0031] In a preferred embodiment, the surface of the semiconductor temperature difference power generation module 43 is coated with thermal conductive glue to make the heat conduction between the interfaces smoother and the cable joint fault feedback more timely.

[0032] Further, see Figure 2 , the heat dissipation module 5 includes a connecting piece 51, a vertical plate 52 arranged on the connecting piece 51, and a plurality of fins 53 arranged on the vertical plate 52. One end of the connecting piece 51 is provided with a connecting hole connected to the access cable connector 2, and the other end of the connecting piece 51 extends to the semiconductor temperature difference power generation module 43. In the above, the connecting piece 51, the vertical plate 52 and the plurality of fins 53 are integrally extruded aluminum profiles, which can improve the heat dissipation speed of the heat dissipation module 5, so that the temperature difference between the heat dissipation module 5 and the output cable connector 3 is larger. Therefore, when the cable connector fails to generate heat, the temperature difference between the output cable connector 3 and the heat dissipation module 5 enables the semiconductor temperature difference power generation module 43 to provide higher power to the sensor module 4, ensuring that the temperature monitoring of the temperature sensor 42 can be carried out smoothly.

[0033] In a preferred embodiment, see Figure 2 , 3, the sensor module 4 also includes a vibration sensor 45 electrically connected to the sensor main control board 41. The vibration sensor 45 is used to monitor the vibration state of the cable joint. When a partial discharge fault occurs in the cable joint, an arc is generated. The ultrasonic wave generated by the arc causes the output cable joint 3 to vibrate. The vibration sensor 45 feeds back the signal to the sensor main control board 41, and then sends an alarm signal to the background monitoring system 8 through the NB-IOT communication module 10. Through the temperature sensor 42 and the vibration sensor 45, the temperature and vibration state of the cable joint can be monitored in real time. When abnormal temperature or arc fault is detected, an alarm signal can be immediately sent to the background monitoring system 8 to achieve timely response and processing of the fault.

[0034] Furthermore, the temperature sensor 42 and the vibration sensor 45 are both arranged close to the wall portion of the access cable connector 2 to improve the sensitivity and accuracy of the temperature sensor 42 and the vibration sensor 45 .

[0035] In a preferred embodiment, see Figure 1 An insulator 21 is sleeved on the access cable connector 2, one end of the insulator 21 is located inside the protective cover 1, and the other end thereof extends outside the protective cover 1, so as to insulate and protect the access cable connector 2 and prevent the access cable connector 2 from being exposed.

[0036] Further, see Figure 1 The output cable connector 3 is sleeved with an insulating sleeve 31, one end of the insulating sleeve 31 is located inside the protective cover 1, and the other end thereof extends outside the protective cover 1, so as to insulate and protect the output cable connector 3 and prevent the output cable connector 3 from being exposed. In actual operation, the access cable connector 2 is vertically arranged, and the output cable connector 3 is horizontally arranged. By sleeved with an insulator 21 on the access cable connector 2, the upper end of the insulator 21 can fix the position of the protective cover 1, and the lower end of the insulator 21 can be fixed on the power distribution equipment by a pressing block, so as to ensure the installation stability of the cable connector.

[0037] In a preferred embodiment, see Figure 1 The protective cover 1 is provided with ventilation holes 11, which are beneficial to ventilation and heat dissipation in the protective cover 1, thereby improving the heat dissipation speed of the heat dissipation module 5.

[0038] In summary, the present invention performs RFID electromagnetic induction power supply to the sensor module 4 through the mutual inductance power supply module 44, and performs semiconductor temperature difference power generation to the sensor module 4 through the semiconductor temperature difference power generation module 43, thereby realizing the self-power supply function of the sensor, without the need for an external power supply or battery, avoiding the complicated wiring process, and eliminating the inconvenience caused by battery life limitations and battery replacement. When the temperature data and vibration status of the cable connector are regularly monitored, the solar power module 6 keeps supplying power to the relay main control board 7, and the relay main control board 7 supplies power to the sensor module 4 through RFID electromagnetic induction to obtain real-time temperature and vibration data. When the cable connector fails and generates heat, the sensor module 4 is automatically activated and sends out an alarm signal through semiconductor temperature difference power generation, realizing a timely fault warning mechanism, which helps to quickly respond to and deal with potential problems, prevent the expansion of faults, and ensure the safe operation of the cable system.

[0039] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the claims attached to the present invention.

Claims

1. A cable joint intelligent protective cover based on wireless passive sensing, characterized in that: It includes a protective cover, an access cable connector, an output cable connector, a sensor module, a heat dissipation module, a solar power module, a relay main control board and a background supervision system. The access cable connector is installed in the protective cover, and the output cable connector, the sensor module and the heat dissipation module are installed on the access cable connector in sequence and locked in position by a nut. The sensor module includes a sensor main control board, a temperature sensor electrically connected to the sensor main control board, a semiconductor temperature difference power generation module, and a mutual inductance power supply module. The semiconductor temperature difference power generation module is located between the output cable connector and the heat dissipation module, and uses the heat generated by the output cable connector when a fault occurs and the temperature difference between the heat dissipation module to power the sensor main control board. The solar power module and the relay main control board are both installed on the protective cover, and the solar power module is electrically connected to the relay main control board. The solar power module supplies power to the sensor main control board through the mutual inductance power supply module. The sensor main control board and the background supervision system are both communicatively connected to the relay main control board.

2. The intelligent cable joint protective cover based on wireless passive sensing according to claim 1 is characterized in that: The relay main control board is electrically connected to a NB-IOT communication module.

3. The intelligent cable joint protective cover based on wireless passive sensing according to claim 1 is characterized in that: The mutual inductance power supply module includes an RFID transmitting end electrically connected to the relay main control board and an RFID receiving end electrically connected to the sensor main control board.

4. The intelligent cable joint protective cover based on wireless passive sensing according to claim 1 is characterized in that: The surface of the semiconductor temperature difference power generation module is coated with heat conductive glue.

5. The intelligent cable joint protective cover based on wireless passive sensing according to claim 1 is characterized in that: The sensor module also includes a vibration sensor electrically connected to the sensor main control board.

6. The intelligent cable joint protective cover based on wireless passive sensing according to claim 5 is characterized in that: The temperature sensor and the vibration sensor are both arranged close to the wall portion where the cable connector is connected.

7. The intelligent cable joint protective cover based on wireless passive sensing according to claim 1 is characterized in that: An insulator is sleeved on the access cable connector, one end of the insulator is located inside the protective cover, and the other end thereof extends outside the protective cover.

8. The intelligent cable joint protective cover based on wireless passive sensing according to claim 1 is characterized in that: An insulating sleeve is sleeved on the output cable connector, one end of the insulating sleeve is located inside the protective cover, and the other end thereof extends outside the protective cover.

9. The intelligent cable joint protective cover based on wireless passive sensing according to claim 1, characterized in that: The protective cover is provided with ventilation holes.

10. The intelligent cable joint protective cover based on wireless passive sensing according to claim 1, characterized in that: The heat dissipation module includes a connecting plate, a vertical plate arranged on the connecting plate, and a plurality of fins arranged on the vertical plate. One end of the connecting plate is provided with a connecting hole connected to the access cable connector, and the other end of the connecting plate extends to the semiconductor temperature difference power generation module.

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