Cable head temperature monitoring system

Abstract

The utility model discloses a cable head temperature monitoring system, which comprises a central processing unit, a temperature sensor, a temperature collector, a radio frequency gain antenna and a power management module, and is characterized in that the central processing unit is respectively connected with the temperature sensor, the temperature collector, the radio frequency gain antenna and the power management module; and the radio frequency gain antenna is respectively connected with the temperature sensor and the temperature collector. According to the cable head temperature monitoring system, the temperature collector, various temperature sensors and the radio frequency gain antenna are matched, so that the whole temperature monitoring process can be completed synchronously, and the safety, the convenience and the real-time performance of the cable head temperature monitoring system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature monitoring, in particular to a cable head temperature monitoring system. Background Art

[0002] Overcurrent in the cable head of power equipment can easily cause equipment tripping failure, reducing the reliability of power grid operation. The reason for the overcurrent is usually because the temperature of the cable head is too high. If the line is overloaded for a long time, the excessive temperature will accelerate the aging of the cable insulation. At the same time, overheating of the cable head may also cause a fire, causing casualties or equipment damage, causing huge economic losses to the power system. Therefore, it is very important to monitor the temperature of the key points of the cable head of power equipment. However, the current temperature monitoring system for the cable head usually only uses a single infrared temperature sensor for temperature measurement, but a single infrared temperature sensor cannot measure the temperature of non-exposed contact points such as cable plugs and contacts. At the same time, the existing cable head temperature measurement system only transmits the monitoring data through a wired network or serial port, but the anti-interference, transmission rate and transmission stability of data transmitted only through a wired network or serial port are insufficient, resulting in the failure of the expected effect of the temperature monitoring of the cable head. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art. The utility model provides a cable head temperature monitoring system. Through the cooperation of a temperature collector, various temperature sensors and a radio frequency gain antenna, the entire temperature monitoring process can be completed synchronously, thereby improving the safety, convenience and real-time performance of the cable head temperature monitoring system.

[0004] The utility model provides a cable head temperature monitoring system, which includes: a central processing unit, a temperature sensor, a temperature collector, a radio frequency gain antenna and a power management module, wherein:

[0005] The central processing unit is connected to the temperature sensor, the temperature collector, the radio frequency gain antenna and the power management module respectively, and the radio frequency gain antenna is connected to the temperature sensor and the temperature collector respectively.

[0006] Optionally, the temperature collector has a built-in E710 chip and an RS485 dual interface.

[0007] Optionally, the temperature sensor is a nut sensor, a hook sensor, a ring sensor, a snap sensor and a plug sensor.

[0008] Optionally, the temperature sensor adopts a nut sensor, a hook sensor, a ring sensor, a buckle sensor and a plug sensor, all of which have built-in electronic tag devices.

[0009] Optionally, the nut sensor is connected to a cable connector of the ring main unit.

[0010] Optionally, the hook-type sensor and the ring-type sensor are connected to high-voltage terminals.

[0011] Optionally, the snap sensor is connected to a moving contact of the switch cabinet.

[0012] Optionally, the plug sensor is connected to the elbow-type cable head of the ring main unit.

[0013] Optionally, the radio frequency gain antenna adopts a circularly polarized UHF band RFID tag antenna.

[0014] Optionally, the power management module includes an air switch and a power adapter.

[0015] The utility model provides a cable head temperature monitoring system. The temperature collector has a built-in E710 chip and an RS485 dual interface, which can realize fast reading and writing of data and improve the transmission rate of monitoring data. Different temperature sensors are configured for different power equipment cable heads. Different temperature sensors can be used to perform high-precision temperature monitoring of key parts. At the same time, each temperature sensor has an electronic tag device, which enables each temperature sensor to have a unique RFID identification code, solving the problems of insufficient communication transmission stability and insufficient anti-interference. The radio frequency gain antenna can emit radio frequency waves, which can meet the high reading performance of the system and make data exchange between different components more reliable. The temperature collector, various temperature sensors and the radio frequency gain antenna are coordinated to enable the entire temperature monitoring process to be completed synchronously, thereby improving the safety, convenience and real-time performance of the cable head temperature monitoring system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structural composition of the cable head temperature monitoring system in the embodiment of the utility model. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] The cable head temperature monitoring system provided by the embodiment of the utility model is as follows: Figure 1 As shown, Figure 1 A structural schematic diagram of a cable head temperature monitoring system in an embodiment of the utility model is shown, and the cable head temperature monitoring system includes: a central processing unit, a temperature sensor, a temperature collector, a radio frequency gain antenna and a power management module, wherein: the central processing unit is respectively connected to the temperature sensor, the temperature collector, the radio frequency gain antenna and the power management module, and the radio frequency gain antenna is respectively connected to the temperature sensor and the temperature collector.

[0020] During the specific implementation of the present invention, the central processing unit plays an overall control role on each component of the cable head temperature monitoring system. The temperature sensor measures the temperature of different power equipment and sends the temperature measurement results to the temperature collector through the RF gain antenna. The temperature collector uses the RF gain antenna to transmit RF waves. On the one hand, this wave activates the temperature sensor to work, and on the other hand, it also transmits the temperature measurement command to realize the functions of transmitting ultra-high frequency RF energy, temperature measurement instructions, receiving and uploading data, etc. The RF gain antenna is used for data transmission between the temperature sensor and the temperature collector, and the power management module is used to provide power to each component of the system.

[0021] In the specific implementation process of the utility model, the temperature collector has a built-in E710 chip and an RS485 dual interface.

[0022] Specifically, the E710 chip is a radio frequency identification (RFID) reader chip. Compared with other reader chips, the E710 chip has better reception sensitivity, chip power consumption and space occupation, and its functions are better, and it can also realize multi-tag recognition. The RS485 dual interface supports high-speed data transmission, long-distance transmission and multi-point communication, which can effectively resist electromagnetic interference, noise interference and interference signals in the environment. At the same time, the temperature collector also supports 9-36V DC wide voltage design, supports 8-port antenna, and supports Modbus RTU communication protocol. The temperature sensor has a metal body and its power consumption is less than 12W.

[0023] In the specific implementation process of the utility model, the temperature sensor adopts a nut sensor, a hook sensor, a ring sensor, a buckle sensor and a plug sensor.

[0024] The temperature sensor adopts a nut sensor, a hook sensor, a ring sensor, a buckle sensor and a plug sensor, all of which have built-in electronic label devices.

[0025] The nut sensor is connected to the cable connector of the ring main unit; the hook sensor and the ring sensor are connected to the high-voltage terminal; the buckle sensor is connected to the moving contact of the switch cabinet; and the plug sensor is connected to the elbow-type cable head of the ring main unit.

[0026] Specifically, each temperature sensor adopts standard protocols, integrated chip design solutions and RFID international Internet of Things standard protocols. Each temperature sensor is miniaturized and can be packaged into different forms to meet the different needs of the power site; each temperature sensor directly contacts the live metal conductor of the primary equipment, and the temperature measurement is more accurate. Each temperature sensor has a built-in electronic tag device, that is, each temperature sensor has a unique RFID identification code; each temperature sensor has a short sampling interval and data is reported in real time. After each temperature sensor receives the radio frequency wave, it starts the digital temperature measurement circuit to measure the temperature, and sends the temperature measurement result to the temperature collector through the radio frequency gain antenna. The electronic sensor tag of the nut sensor is embedded in the cable elbow-type fastening nut sensor. The nut sensor is connected to the cable connector of the ring main unit and can directly contact and measure the temperature of the conductor inside the cable connector. In the ring main unit, three phases are one interval, and three nut sensors are configured in each interval. At the same time, the nut sensor adopts a double-tag design. Its power supply mode is RF passive power supply. The measurement temperature range is -45℃-125℃, the measurement temperature accuracy is ≤±1℃, the maximum tolerance temperature is 155℃ / 2 hours, the operating frequency is 902MHz-928MHz, and it supports EPC Global C1G2v1.2 and IEC180006C standard Internet of Things protocols. The receiving distance is greater than or equal to 2m, the data sending time is less than or equal to 60 seconds, the voltage level is 10 / 35kV, and the protection level is IP68. The nut sensor is passive and wireless, small in size, easy to install, digital technology, strong anti-interference, and stable and reliable temperature values. The hook-type sensor comes with an RFID tag, which can immediately locate the sensor. The hook-type sensor is a characteristic hook-shaped shape and is easy to install. Its parameters are the same as those of the nut sensor, which will not be repeated here. Therefore, the digital technology of the hook-type sensor has strong anti-interference, and the temperature value is stable and reliable. In conjunction with the temperature collector, it can provide various data upload and networking methods. The ring-type sensor is a characteristic ring-shaped shape and is fixed with a nut. Its parameters are the same as those of the nut sensor, which will not be repeated here. At the same time, the ring-type sensor adopts an ultra-thin design. The buckle sensor is a characteristic buckle shape, and its parameters are the same as those of the nut sensor, which will not be repeated here. The buckle sensor is connected to the moving contact of the switch cabinet and is in direct contact with the conductor of the switch cabinet. The buckle sensor can also be directly clamped on the plum blossom contact of the switch cabinet. The hook-type sensor and the ring-type sensor are connected to the high-voltage terminal. At the same time, the hook-type sensor and the ring-type sensor are also connected to the low-voltage terminal. The connection between the configuration sensor and the ring-type sensor and the terminal is fixed with a nut.The plug sensor is a special ring-shaped one, and its parameters are the same as those of the nut sensor, which will not be repeated here. The plug sensor is connected to the elbow-type cable head of the ring main unit and is in direct contact with the cable head terminal of the ring main unit. Each temperature sensor has the advantages of easy installation, strong anti-interference ability of digital technology and stable and reliable temperature values. Different temperature sensors are configured for different cable heads of power equipment. Different temperature sensors can be used to perform high-precision temperature monitoring of key parts. At the same time, each temperature sensor has an electronic tag device, which enables each temperature sensor to have a unique RFID identification code, solving the problems of insufficient stability and insufficient anti-interference of communication transmission. The device can monitor the temperature changes of key points of the equipment in real time.

[0027] In the specific implementation process of the utility model, the radio frequency gain antenna adopts a circularly polarized UHF frequency band RFID tag antenna.

[0028] Specifically, the circularly polarized ultra high frequency (UHF) band RFID tag antenna is a universal far-field antenna that adopts circular polarization and is suitable for UHF band RFID applications. It has the characteristics of high gain and low standing wave. It is used in systems with high reading performance requirements. Its size is 166.5mm*166.5mm*22.5mm, the operating frequency is 902MHz-928MHz, the interface specification is the subminiature version A (SubMiniature version A, SMA) interface, and it adopts three fixing methods: fastening screws, magnetic suction and 3M adhesive. The protection level is IP68. Use the antenna extension cable to connect the temperature collector to the RF gain antenna, use the L-shaped adapter plate to fix it on the back of the RF gain antenna, tighten the screws, remove the upper adjustment plate of the pole bracket, install it on the L-shaped adapter plate, connect the lower adjustment plate of the pole bracket to the upper adjustment plate, first adjust it to a horizontal position, and then slightly adjust it downward later. Use a throat clamp to fasten the pole bracket to the preset position, and adjust the RF gain antenna so that the antenna panel is slightly downward and points to the temperature sensor. Connect the feeder to the antenna interface and tighten it. This is the installation method of the RF gain antenna. The temperature data obtained by the temperature sensor is sent to the temperature collector through the RF gain antenna, and finally uploaded to the power distribution intelligent gateway by the temperature collector. The RF gain antenna can emit radio frequency waves, which can meet the high reading performance of the system and make the data exchange between different components more reliable. At the same time, the installation and operation of the temperature collector, RF gain antenna and temperature sensor will not interfere with the normal operation of surrounding power electronics and communication equipment.

[0029] In the specific implementation process of the utility model, the power management module includes an air switch and a power adapter.

[0030] Specifically, an air switch, also known as an air circuit breaker, is a type of circuit breaker. It is a switch that automatically disconnects as long as the current in the circuit exceeds the rated current. An air switch is a very important electrical appliance in low-voltage power distribution networks and electric traction systems. It integrates control and multiple protection functions. In addition to being able to contact and disconnect circuits, it can also protect circuits or electrical equipment from short circuits, severe overloads, and undervoltages. It can also be used to start motors infrequently. A power adapter is a device that converts alternating current into direct current and outputs it stably. It is more convenient and can provide a more stable output voltage, which can effectively avoid damage to the equipment caused by fluctuations in input voltage.

[0031] In summary, the embodiment of the utility model provides a cable head temperature monitoring system. The temperature collector has a built-in E710 chip and RS485 dual interfaces, which can realize fast reading and writing of data and improve the transmission rate of monitoring data. Different temperature sensors are configured for different power equipment cable heads. Different temperature sensors can be used to perform high-precision temperature monitoring of key parts. At the same time, each temperature sensor has an electronic tag device, which enables each temperature sensor to have a unique RFID identification code, solving the problems of insufficient communication transmission stability and insufficient anti-interference. The RF gain antenna can emit RF waves, which can meet the high reading performance of the system and make data exchange between different components more reliable. The temperature collector, various temperature sensors and RF gain antenna are coordinated to enable the entire temperature monitoring process to be completed synchronously, thereby improving the safety, convenience and real-time performance of the cable head temperature monitoring system.

[0032] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the storage medium may include: a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc.

[0033] In addition, the above is a detailed introduction to a cable head temperature monitoring system provided by an embodiment of the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method of the utility model and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A cable head temperature monitoring system, characterized in that: The cable head temperature monitoring system includes: a central processing unit, a temperature sensor, a temperature collector, a radio frequency gain antenna and a power management module, wherein: The central processing unit is respectively connected to the temperature sensor, temperature collector, radio frequency gain antenna and power management module; the radio frequency gain antenna is respectively connected to the temperature sensor and temperature collector; the temperature sensor adopts a nut sensor, a hook sensor, a ring sensor, a buckle sensor and a plug sensor; the nut sensor, the hook sensor, the ring sensor, the buckle sensor and the plug sensor all have built-in electronic tag devices; the radio frequency gain antenna adopts a circularly polarized UHF band RFID tag antenna.

2. The cable head temperature monitoring system according to claim 1, characterized in that: The temperature collector has a built-in E710 chip and an RS485 dual interface.

3. The cable head temperature monitoring system according to claim 1, characterized in that: The nut sensor is connected to the cable connector of the ring main unit.

4. The cable head temperature monitoring system according to claim 1, characterized in that: The hook-type sensor and the ring-type sensor are connected to the high-voltage wiring terminal.

5. The cable head temperature monitoring system according to claim 1, characterized in that: The buckle sensor is connected to the moving contact of the switch cabinet.

6. The cable head temperature monitoring system according to claim 1, characterized in that: The plug sensor is connected to the elbow-type cable head of the ring network cabinet.

7. The cable head temperature monitoring system according to claim 1, characterized in that: The power management module includes an air switch and a power adapter.

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