Electric transmission and transformation equipment internet of things current measuring device

Abstract

The utility model discloses an Internet of Things current measuring device for power transmission and transformation equipment, relates to the field of power systems, and solves the defects of poor anti-interference performance and poor communication stability in the existing Internet of Things current measuring device for power transmission and transformation equipment. Comprising a current sensor, a filter circuit, a digital signal processing chip, a communication module, an embedded processor, a power management circuit, a lightning protection circuit, a temperature sensor, a vibration sensor and a protective shell. According to the utility model, the influence of external electromagnetic interference on current measurement is effectively suppressed through the filter circuit and the lightning protection circuit; through cooperation of the digital signal processing chip and the communication module, accurate acquisition and stable transmission of data are realized. The temperature sensor and the vibration sensor are introduced into the device, so that real-time monitoring and feedback of environmental parameters are realized, the environmental adaptability of the device is enhanced, and the device can stably operate under severe environmental conditions.

Description

Technical Field

[0001] The utility model relates to the field of power systems, and more specifically to an Internet of Things current measuring device for power transmission and transformation equipment. Background Art

[0002] With the rapid development of society and the advancement of science and technology, the power industry has an increasing demand for intelligence and automation. With the vigorous development of technologies such as the Internet of Things, big data, and artificial intelligence, traditional power transmission and transformation equipment also needs to keep pace with the times and achieve intelligent management and monitoring. This trend stems from the continuous pursuit of safe and stable operation of the power grid and the continuous improvement of energy efficiency.

[0003] In this era, traditional power transmission and transformation equipment needs more data support to achieve real-time monitoring, fault prediction and remote control. The emergence of Internet of Things technology makes it possible to achieve this goal. By combining sensors, communication technology and data analysis, Internet of Things technology enables power transmission and transformation equipment to achieve remote monitoring, data transmission and intelligent control, thereby improving the safety and reliability of the power grid.

[0004] Traditional power transmission and transformation equipment monitoring systems usually use wired connections or simple wireless transmission methods. When faced with external interference such as electromagnetic interference and voltage fluctuations, data distortion and measurement deviation are prone to occur, affecting data accuracy and reliability. In addition, traditional power transmission and transformation equipment monitoring equipment is susceptible to signal interference and transmission distance limitations, resulting in unstable communication between the equipment and the monitoring center, affecting the timeliness and accuracy of the data.

[0005] Therefore, the utility model discloses an Internet of Things current measuring device for power transmission and transformation equipment. Utility Model Content

[0006] The purpose of the utility model is to design a current measuring device for the Internet of Things of power transmission and transformation equipment to solve the shortcomings of poor anti-interference and communication stability existing in the existing current measuring devices for the Internet of Things of power transmission and transformation equipment.

[0007] In order to achieve the above technical effects, the utility model adopts the following technical solutions:

[0008] A current measuring device for the Internet of Things of power transmission and transformation equipment, comprising: a current sensor, a filter circuit, a digital signal processing chip, a communication module, an embedded processor, a power management circuit, a lightning protection circuit, a temperature sensor, a vibration sensor and a protective shell; the current sensor transmits the collected current signal to the filter circuit through a connection interface; the output end of the filter circuit is electrically connected to the input end of the digital signal processing chip; the output end of the digital signal processing chip is electrically connected to the input end of the communication module; the communication module sends data to the embedded processor through the communication interface; the embedded processor controls the power management circuit through a control interface; the power management circuit receives the control signal of the embedded processor through an electrical connection, and performs power management according to the signal; the output end of the lightning protection circuit is electrically connected to the input end of the current sensor, the temperature sensor and the vibration sensor; the temperature sensor and the vibration sensor transmit environmental parameter data to the embedded processor through an electrical interface; the above devices are encapsulated in the protective shell.

[0009] As a further description of the above technical solution:

[0010] The model of the current sensor is CT-2CH2000, and the chip of the current sensor is made of magnetostrictive material; a dual-channel current sensing coil is arranged around the chip of the current sensor to sense the current passing through the transmission line.

[0011] As a further description of the above technical solution:

[0012] The communication module includes a main control chip, an antenna, a radio frequency front-end module, a power amplifier and a radio frequency filter; the model of the main control chip is MDM9206; the communication interface pin of the main control chip is electrically connected to the radio frequency front-end module for sending and receiving data; the control interface pin of the main control chip is connected to the power amplifier and the radio frequency filter for controlling the working state of the power amplifier and the radio frequency filter; the antenna is connected to the radio frequency front-end module through a coaxial cable to transmit radio frequency signals; the radio frequency interface pin of the radio frequency front-end module is connected to the antenna to receive and send radio frequency signals; the data interface pin of the radio frequency front-end module is connected to the digital signal after the main control chip transmits and processes; the radio frequency front-end module includes a radio frequency receiver, a radio frequency transmitter and a radio frequency signal conditioner; the input interface pin of the power amplifier is connected to the output interface pin of the radio frequency front-end module to receive radio frequency signals; the output interface pin of the power amplifier is connected to the antenna to provide an amplified radio frequency signal; the input interface pin of the radio frequency filter is connected to the output interface pin of the radio frequency front-end module to receive radio frequency signals; the output interface pin of the radio frequency filter is connected to the input interface pin of the power amplifier to provide a radio frequency signal after filtering.

[0013] As a further description of the above technical solution:

[0014] The vibration sensor model is ADXL345; the vibration sensor is composed of a silicon wafer, a metal wire, and an insulating material.

[0015] As a further description of the above technical solution:

[0016] The embedded processor adopts TISAM335x series chips; the embedded processor integrates a processor chip, an on-chip memory, a temporary memory, an analog-to-digital converter, a communication interface, a universal input-output interface, a timer, and a clock and reset circuit; the data bus pins, address bus pins, and control bus pins of the processor chip are connected to the on-chip memory and temporary memory and other peripheral interfaces; the interrupt request pin of the processor chip is connected to an external interrupt controller for processing external interrupt events; the clock signal interface and reset signal interface of the processor chip are connected to the clock and reset circuit to provide system clock and reset; the analog-to-digital converter is connected to the processor chip through a data bus for processing; the output end of the communication interface is electrically connected to the input end of the processor chip; the universal input-output interface is electrically connected to an external device for input / output control; the output end of the timer is electrically connected to the input end of the processor chip for generating timing and pulse signals.

[0017] As a further description of the above technical solution:

[0018] The power management circuit includes a power input interface, a power management chip, a power output interface, a protection circuit and a power status indicator light; the power input interface is connected to the VIN input pin of the power management chip through a data transmission line; the power management chip integrates a DC-DC converter, a battery charging manager and a power timing controller; the output pins VOUT1 and VOUT2 of the power management chip are connected to the power output interface; the protection circuit integrates an overcurrent protector, an overvoltage protector and an undervoltage protector; the output end of the protection circuit is electrically connected to the monitoring pin of the power management chip; the output pin of the protection circuit is connected to the power input pin of each component; the general input / output GPIO pin of the power management chip is connected to the input end of the power status indicator light.

[0019] As a further description of the above technical solution:

[0020] The lightning protection circuit includes a lightning arrester, an overvoltage protector, a discharge tube, a suppression inductor and a filter; the lightning arrester is made of a metal oxide MOV; the metal oxide MOV is composed of zinc oxide, tungsten and zirconium; the lightning arrester is electrically connected to the input end and the ground wire of the circuit; the output ends of the lightning arrester, the overvoltage protector and the discharge tube are connected to the ground wire; the input pin of the lightning arrester is connected to the power line of the circuit; the suppression inductor is connected to the power line of the circuit to limit current fluctuations and stabilize voltage; the output end of the filter is connected to the load end of the circuit.

[0021] As a further description of the above technical solution:

[0022] The protective shell is made of polycarbonate material; the interior of the protective shell is covered with a carbon nanotube shielding layer.

[0023] Positive beneficial effects:

[0024] In summary, due to the adoption of the above technical scheme, the beneficial effect of the utility model is as follows: the utility model effectively suppresses the influence of external electromagnetic interference on current measurement by introducing a filter circuit and a lightning protection circuit in the device. The filter circuit can filter out high-frequency noise and ensure the accuracy of the current sensor, while the lightning protection circuit can prevent external factors such as lightning strikes from damaging the equipment, thereby improving the anti-interference performance of the device. Through the cooperation of the digital signal processing chip and the communication module, accurate data collection and stable transmission are achieved. The digital signal processing chip can accurately process and filter the collected current signal to ensure the accuracy and stability of the data; the communication module can transmit the processed data to the monitoring center or other equipment through the network, ensuring the stability and reliability of the communication. Real-time monitoring and feedback of environmental parameters are achieved by introducing temperature sensors and vibration sensors in the device. These sensors can timely perceive changes in ambient temperature, vibration, etc., thereby providing an important reference for the normal operation of the device, enhancing the environmental adaptability of the device, and enabling it to operate stably under harsh environmental conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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 prior art descriptions are 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 creative labor, among which:

[0026] Figure 1 This is the equipment architecture diagram of the utility model;

[0027] Figure 2This is a schematic diagram of the overall structure of the embedded processor of the utility model;

[0028] Figure 3 This is a framework diagram of the communication module of the utility model;

[0029] Numbers in the figure: 1. Current sensor; 2. Filter circuit; 3. Digital signal processing chip; 4. Communication module; 5. Embedded processor; 6. Power management circuit; 7. Lightning protection circuit; 8. Temperature sensor; 9. Vibration sensor; 10. Protective shell; 401. Main control chip; 402. Antenna; 403. RF front-end module; 404. Power amplifier; 405. RF filter; 501. Processor chip; 502. On-chip memory; 503. Temporary memory; 504. Analog-to-digital converter; 505. Communication interface. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this utility model.

[0031] like Figure 1-Figure 3 As shown, in the above embodiment, a current measuring device of the Internet of Things for power transmission and transformation equipment includes: a current sensor 1, a filter circuit 2, a digital signal processing chip 3, a communication module 4, an embedded processor 5, a power management circuit 6, a lightning protection circuit 7, a temperature sensor 8, a vibration sensor 9 and a protective shell 10; the current sensor 1 transmits the collected current signal to the filter circuit 2 through a connection interface; the output end of the filter circuit 2 is electrically connected to the input end of the digital signal processing chip 3; the output end of the digital signal processing chip 3 is electrically connected to the input end of the communication module 4; the communication module 4 sends data to the embedded processor 5 through the communication interface; the embedded processor 5 controls the power management circuit 6 through a control interface; the power management circuit 6 receives the control signal of the embedded processor 5 through an electrical connection, and performs power management according to the signal; the output end of the lightning protection circuit 7 is electrically connected to the input end of the current sensor 1, the temperature sensor 8 and the vibration sensor 9; the temperature sensor 8 and the vibration sensor 9 transmit environmental parameter data to the embedded processor 5 through an electrical interface; the above device is encapsulated in the protective shell 10.

[0032] In the above embodiment, the model of the current sensor 1 is CT-2CH2000, and the chip of the current sensor 1 is made of magnetostrictive material; a dual-channel current sensing coil is arranged around the chip of the current sensor 1 for sensing the current passing through the transmission line.

[0033] In a specific embodiment, the chip of the dual-channel current sensor 1 is made of magnetostrictive material and has a good magnetostrictive effect. A dual-channel current sensing coil is arranged around the sensor chip to sense the current passing through the transmission line. When the current passes through the transmission line, the magnetic field generated will affect the magnetostrictive material around the sensor, causing it to deform, thereby causing the voltage in the induction coil to change.

[0034] In a specific embodiment of an IoT current measuring device for power transmission and transformation equipment, a dual-channel current sensor 1 is installed on a transmission line and receives a current signal through an induction coil. The sensor chip converts the sensed voltage signal into a digital signal and sends it to an embedded processor for processing through a communication module. The embedded processor analyzes, processes and stores the received current data, and transmits the processed data to an IoT platform or a monitoring center through a communication module. In a specific embodiment of an IoT current measuring device for power transmission and transformation equipment, a dual-channel current sensor 1 is made of magnetostrictive material, has high sensitivity and stability, and can accurately sense the current signal on the transmission line. Through the dual-channel design, the sensor can sense two current signals at the same time, realize the simultaneous measurement of multiple currents, and improve the measurement efficiency and accuracy. The sensor has a simple installation method and good adaptability, can be widely used in power transmission and transformation systems, helps to achieve accurate monitoring and management of current, and improves the safety and stability of the system.

[0035] In the above embodiment, the communication module 4 includes a main control chip 401, an antenna 402, a RF front-end module 403, a power amplifier 404 and a RF filter 405; the model of the main control chip 401 is MDM9206; the communication interface pins of the main control chip 401 are electrically connected to the RF front-end module 403 for sending and receiving data; the control interface pins of the main control chip 401 are connected to the power amplifier 404 and the RF filter 405 for controlling the working states of the power amplifier 404 and the RF filter 405; the antenna 402 is connected to the RF front-end module 403 via a coaxial cable to transmit RF signals; the RF interface pins of the RF front-end module 403 are connected to the antenna 402 to receive and send RF signals. The RF front-end module 403 includes an RF receiver, an RF transmitter and an RF signal conditioner; the input interface pin of the power amplifier 404 is connected to the output interface pin of the RF front-end module 403 to receive the RF signal; the output interface pin of the power amplifier 404 is connected to the antenna 402 to provide the amplified RF signal; the input interface pin of the RF filter 405 is connected to the output interface pin of the RF front-end module 403 to receive the RF signal; the output interface pin of the RF filter 405 is connected to the input interface pin of the power amplifier 404 to provide the RF signal after filtering.

[0036] In a specific embodiment, the communication module is a key component in the current measurement device of the Internet of Things for power transmission and transformation equipment, and is responsible for transmitting the collected current data to the monitoring center or other equipment through wireless communication technology. The communication module uses a series of components, including a main control chip, an antenna, a radio frequency front-end module, a power amplifier, and a radio frequency filter. The main control chip is responsible for controlling the workflow and data processing of the communication module, the antenna is used to receive and send wireless signals, the radio frequency front-end module is responsible for receiving and processing wireless signals, the power amplifier enhances the transmission power of the signal, and the radio frequency filter is used to filter out unnecessary frequency components to ensure communication quality.

[0037] In the specific implementation process, the communication module first receives the collected current data through the antenna, then processes and modulates the signal through the RF front-end module, then enhances the signal transmission power through the power amplifier, and finally filters the signal through the RF filter, and sends the processed signal through the antenna. At the receiving end, the same communication module receives the signal, and then demodulates the signal through the reverse processing process and transmits it to the main control chip for data processing and analysis.

[0038] By adopting such a communication module design, the RF front-end module and RF filter can effectively suppress external interference signals and ensure stable communication quality. The power amplifier can enhance the signal transmission power, extend the communication distance, and ensure that the signal can be transmitted stably over a long distance. By optimizing the design of the communication module, a higher data transmission rate can be achieved, and real-time monitoring and response can be realized.

[0039] In the above embodiment, the vibration sensor 9 is of model ADXL345; the vibration sensor 9 is composed of a silicon wafer, a metal wire, and an insulating material.

[0040] In a specific embodiment, the vibration sensor 9 adopts the ADXL345 model, which is a micro-electromechanical system (MEMS) acceleration sensor, which converts acceleration signals into electrical signals using micro-electromechanical technology. The sensor is composed of a silicon wafer, a metal wire and an insulating material. A microstructure is integrated on the silicon wafer. When subjected to external vibration or acceleration changes, the mass in the microstructure undergoes relative displacement and generates an electrical signal. The metal wire is used to connect the sensor to the measurement system and transmit the data collected by the sensor.

[0041] In a specific implementation, the vibration sensor 9 is installed on or around the power transmission and transformation equipment to monitor the vibration of the equipment. When the equipment is subjected to external vibration or acceleration changes, the microstructure in the silicon wafer of the sensor will undergo relative displacement, generating an electrical signal related to the acceleration change. The sensor transmits the collected electrical signal to an embedded processor or data acquisition unit through a metal wire. The embedded processor or data acquisition unit receives and processes the data transmitted by the sensor, can monitor the vibration of the equipment in real time, and perform corresponding data analysis and processing.

[0042] In a specific implementation, the vibration sensor 9 can monitor the vibration of the power transmission and transformation equipment in real time, including the vibration during the operation of the equipment and the vibration caused by the external environment. By monitoring the vibration of the equipment, the abnormal operation state or failure of the equipment can be discovered in time, which helps to warn in advance and prevent damage or accidents of the equipment. In addition, the sensor is manufactured using MEMS technology, and has the characteristics of small size, light weight, low power consumption, etc., and will not affect the normal operation of the equipment. Secondly, the application of sensors can improve the operating safety and reliability of power transmission and transformation equipment, reduce downtime, reduce maintenance costs, and improve the overall operating efficiency of the equipment.

[0043] In the above embodiment, the embedded processor 5 adopts TISAM335x series chips; the embedded processor 5 integrates a processor chip 501, an on-chip memory 502, a temporary memory 503, an analog-to-digital converter 504, a communication interface 505, a general input and output interface 506, a timer 507, and a clock and reset circuit 508; the data bus pins, address bus pins, and control bus pins of the processor chip 501 are connected to the on-chip memory 502 and the temporary memory 503 and other peripheral interfaces; the interrupt request pin of the processor chip 501 is connected to the external interrupt A controller is used to handle external interrupt events; the clock signal interface and reset signal interface of the processor chip 501 are connected to the clock and reset circuit 508 to provide system clock and reset; the analog-to-digital converter 504 is connected to the processor chip 501 through a data bus for processing; the output end of the communication interface 505 is electrically connected to the input end of the processor chip 501; the general input and output interface 506 is electrically connected to external devices for input / output control; the output end of the timer 507 is electrically connected to the input end of the processor chip 501 to generate timing and pulse signals.

[0044] In a specific embodiment, the embedded processor 5 is the core component of the current measuring device of the Internet of Things for power transmission and transformation equipment, and adopts the TISAM335x series chip. The processor integrates multiple functional modules, including a processor chip, an on-chip memory, a temporary memory, an analog-to-digital converter, a communication interface, a general input-output interface, a timer, and a clock and reset circuit. The processor chip is responsible for performing various calculation and control tasks, the on-chip memory is used to store program code and data, the temporary memory is used to temporarily store intermediate results, the analog-to-digital converter is used to convert analog current signals into digital signals, the communication interface is used to exchange data with other devices, the general input-output interface is used to connect external sensors and actuators, the timer is used to manage timing tasks, and the clock and reset circuit is used for system clock management and reset control.

[0045] In the specific implementation process, the embedded processor 5 first receives the collected current signal through the analog-to-digital converter 504 and converts it into a digital signal. Then, the processor chip 501 executes the pre-written program code to process and analyze the received digital signal to obtain the required current data. At the same time, the processor chip 501 transmits the processed data to the monitoring center or other equipment through the communication interface 505 to achieve data exchange and communication. The general input and output interface 506 can be connected to external sensors or actuators to achieve control and monitoring of power transmission and transformation equipment. The timer 507 can manage timing tasks to ensure the normal operation of the system. The clock and reset circuit 508 is used for system clock management and reset control to ensure the stability and reliability of the system.

[0046] Specifically, the TISAM335x series chip has powerful computing power and rich peripheral interfaces, which can meet complex data processing and communication needs. In addition, the embedded processor 5 integrates multiple functional modules, reduces the number and complexity of external devices, and reduces system cost and power consumption. Secondly, the clock and reset circuit 508 ensures the stability and reliability of the system and ensures the normal progress of data acquisition and communication. At the same time, the general input and output interface 506 can be connected to external sensors or actuators to achieve flexible expansion and customization of system functions.

[0047] In the above embodiment, the power management circuit 6 includes a power input interface, a power management chip, a power output interface, a protection circuit and a power status indicator light; the power input interface is connected to the VIN input pin of the power management chip through a data transmission line; the power management chip integrates a DC-DC converter, a battery charging manager and a power timing controller; the output pins VOUT1 and VOUT2 of the power management chip are connected to the power output interface; the protection circuit integrates an overcurrent protector, an overvoltage protector and an undervoltage protector; the output end of the protection circuit is electrically connected to the monitoring pin of the power management chip; the output pin of the protection circuit is connected to the power input pin of each component; the general input / output GPIO pin of the power management chip is connected to the input end of the power status indicator light.

[0048] In a specific embodiment, the power input interface is used to connect an external power source, such as an AC power source or a DC power source. The power management chip is responsible for monitoring and controlling the input and output of the power source to ensure stable power supply to the current measuring device. The protection circuit is used to detect and handle power supply abnormalities, such as overload, short circuit or overvoltage, to protect the device and other components from damage. The power status indicator light is used to indicate the working status of the power source, such as normal operation, abnormal operation or power off state.

[0049] In a current measuring device of the Internet of Things for power transmission and transformation equipment, the implementation process of the power management circuit 6 is as follows: first, the power input interface is connected to an external power supply to guide the power input to the power management chip. Next, the power management chip monitors and processes the input power to ensure the stability and safety of the output. The processed power is supplied to other components of the current measuring device, such as sensors, embedded processors, etc. At the same time, the protection circuit monitors the status of the power supply in real time. Once an abnormal situation is detected, such as overload or short circuit, the power supply will be cut off in time to protect the safety of the equipment and system. The power status indicator light indicates the working status of the current power supply according to the feedback status of the power management chip, which is convenient for users to understand the power supply status of the equipment.

[0050] Specifically, the power management circuit 6 can ensure the stable power supply of the current measuring device of the Internet of Things of the power transmission and transformation equipment, and ensure its normal operation. Secondly, through the intelligent control of the power management chip and the role of the protection circuit, it can effectively prevent equipment damage or failure caused by power problems. In addition, the power status indicator provides an intuitive power status prompt, so that the user can understand the working status of the device in time. At the same time, integrating the power management circuit 6 in the device helps to improve the reliability and stability of the equipment, reduce the downtime caused by power problems, and improve the overall performance and service life of the device.

[0051] In the above embodiment, the lightning protection circuit 7 includes a lightning arrester, an overvoltage protector, a discharge tube, a suppression inductor and a filter; the lightning arrester is made of a metal oxide MOV; the metal oxide MOV is composed of zinc oxide, tungsten and zirconium; the lightning arrester is electrically connected to the input end and the ground wire of the circuit; the output ends of the lightning arrester, the overvoltage protector and the discharge tube are connected to the ground wire; the input pin of the lightning arrester is connected to the power line of the circuit; the suppression inductor is connected to the power line of the circuit to limit current fluctuations and stabilize voltage; the output end of the filter is connected to the load end of the circuit.

[0052] In a specific embodiment, the arrester is used to absorb lightning energy when lightning strikes, preventing overvoltage from damaging other circuits. The overvoltage protector is used to limit the voltage level when the system is overvoltage, protecting the subsequent circuits from damage. The discharge tube is used to provide a low impedance path when overvoltage occurs, discharging the overvoltage to the ground to protect the equipment. The suppression inductor is used to suppress high-frequency electromagnetic interference to ensure the normal operation of the equipment. The filter is used to filter out high-frequency noise and interference in the power supply, and provide a stable power supply to the subsequent circuit.

[0053] In the specific implementation process, the lightning protection circuit 7 first filters the power supply and suppresses interference through the suppression inductor and filter to ensure the stability of the power supply provided to the subsequent circuit. When encountering lightning strikes or overvoltage, the lightning arrester and overvoltage protector will respond quickly to absorb or limit the overvoltage to prevent it from propagating to the subsequent circuit. At the same time, the discharge tube will provide a low-impedance discharge path to discharge the overvoltage to the ground to protect the equipment from damage.

[0054] In this lightning protection circuit 7, the lightning arrester and overvoltage protector can effectively absorb and limit the overvoltage caused by lightning strikes, protecting the equipment from damage. The discharge tube provides a low-impedance discharge path to ensure that the overvoltage can be discharged to the ground in time, protecting the equipment from overvoltage damage. The suppression inductor and filter can effectively suppress high-frequency electromagnetic interference, ensuring the normal operation of the equipment and data accuracy.

[0055] In the above embodiment, the protective shell 10 is made of polycarbonate material; the interior of the protective shell 10 is covered with a carbon nanotube shielding layer.

[0056] In a specific embodiment, the protective housing 10 serves as the housing of the current measuring device, and its main function is to protect the internal circuits and components from interference and damage from the external environment. The polycarbonate material has good heat resistance, corrosion resistance and mechanical strength, and can effectively protect the internal circuits from the influence of the external environment. The carbon nanotube shielding layer is internally covered on the surface of the protective housing 10 to further enhance the shielding effect against electromagnetic interference and ensure the accuracy and stability of the current measuring device.

[0057] In an IoT current measuring device for power transmission and transformation equipment, first, a polycarbonate material is selected to make the shell structure of the protective shell 10 to ensure that it has good heat resistance, corrosion resistance and mechanical strength. Secondly, a carbon nanotube shielding layer is covered on the surface of the protective shell 10, which can be achieved by coating or spraying. The microstructure formed by the carbon nanotube shielding layer can effectively absorb and shield external electromagnetic waves to prevent them from interfering with the internal circuit.

[0058] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these specific embodiments are only examples, and those skilled in the art may omit, replace, and change the details of the above methods and systems without departing from the principles and essence of the present invention. For example, merging the above method steps so as to perform substantially the same functions in substantially the same manner to achieve substantially the same results is within the scope of the present invention. Therefore, the scope of the present invention is limited only by the appended claims.

Claims

1. A current measuring device for Internet of Things of power transmission and transformation equipment, characterized in that: include: A current sensor (1), a filter circuit (2), a digital signal processing chip (3), a communication module (4), an embedded processor (5), a power management circuit (6), a lightning protection circuit (7), a temperature sensor (8), a vibration sensor (9) and a protective housing (10); the current sensor (1) transmits a collected current signal to the filter circuit (2) via a connection interface; the output end of the filter circuit (2) is electrically connected to the input end of the digital signal processing chip (3); the output end of the digital signal processing chip (3) is electrically connected to the input end of the communication module (4); the communication module (4) receives the collected current signal via a communication interface. The embedded processor (5) controls the power management circuit (6) through the control interface; the power management circuit (6) receives the control signal of the embedded processor (5) through an electrical connection, and performs power management according to the signal; the output end of the lightning protection circuit (7) is electrically connected to the input ends of the current sensor (1), the temperature sensor (8) and the vibration sensor (9); the temperature sensor (8) and the vibration sensor (9) transmit the environmental parameter data to the embedded processor (5) through the electrical interface; and the above devices are encapsulated in the protective housing (10).

2. The current measuring device of the Internet of Things for power transmission and transformation equipment according to claim 1 is characterized in that: The model of the current sensor (1) is CT-2CH2000, and the chip of the current sensor (1) is made of magnetostrictive material; a dual-channel current sensing coil is arranged around the chip of the current sensor (1) for sensing the current passing through the transmission line.

3. The current measuring device of the Internet of Things for power transmission and transformation equipment according to claim 1 is characterized in that: The communication module (4) comprises a main control chip (401), an antenna (402), a radio frequency front-end module (403), a power amplifier (404) and a radio frequency filter (405); the model of the main control chip (401) is MDM9206; the communication interface pins of the main control chip (401) are electrically connected to the radio frequency front-end module (403) for sending and receiving data; the control interface pins of the main control chip (401) are connected to the power amplifier (404) and the radio frequency filter (405) for controlling the working states of the power amplifier (404) and the radio frequency filter (405); the antenna (402) is connected to the radio frequency front-end module (403) via a coaxial cable to transmit radio frequency signals; The radio frequency interface pins of the radio frequency front-end module (403) are connected to the antenna (402) to receive and send radio frequency signals; The data interface pin of the radio frequency front-end module (403) is connected to the digital signal after transmission and processing by the main control chip (401); the radio frequency front-end module (403) comprises a radio frequency receiver, a radio frequency transmitter and a radio frequency signal regulator; the input interface pin of the power amplifier (404) is connected to the output interface pin of the radio frequency front-end module (403) to receive the radio frequency signal; the output interface pin of the power amplifier (404) is connected to the antenna (402) to provide the amplified radio frequency signal; the input interface pin of the radio frequency filter (405) is connected to the output interface pin of the radio frequency front-end module (403) to receive the radio frequency signal; the output interface pin of the radio frequency filter (405) is connected to the input interface pin of the power amplifier (404) to provide the radio frequency signal after filtering processing.

4. The current measuring device of the Internet of Things for power transmission and transformation equipment according to claim 1, characterized in that: The vibration sensor (9) is of model ADXL345; the vibration sensor (9) is composed of a silicon wafer, a metal wire, and an insulating material.

5. The current measuring device of the Internet of Things for power transmission and transformation equipment according to claim 1, characterized in that: The embedded processor (5) adopts a TISAM335x series chip; the embedded processor (5) integrates a processor chip (501), an on-chip memory (502), a temporary memory (503), an analog-to-digital converter (504), a communication interface (505), a general input-output interface (506), a timer (507), and a clock and reset circuit (508); the data bus pins, address bus pins, and control bus pins of the processor chip (501) are connected to the on-chip memory (502) and the temporary memory (503) and other peripheral interfaces; The interrupt request pin of the processor chip (501) is connected to an external interrupt controller for processing external interrupt events; the clock signal interface and reset signal interface of the processor chip (501) are connected to a clock and reset circuit (508) for providing system clock and reset; the analog-to-digital converter (504) is connected to the processor chip (501) via a data bus for processing; the output end of the communication interface (505) is electrically connected to the input end of the processor chip (501); the universal input / output interface (506) is electrically connected to an external device for input / output control; The output end of the timer (507) is electrically connected to the input end of the processor chip (501) for generating timing and pulse signals.

6. The current measuring device of the Internet of Things for power transmission and transformation equipment according to claim 1, characterized in that: The power management circuit (6) comprises a power input interface, a power management chip, a power output interface, a protection circuit and a power status indicator light; the power input interface is connected to the VIN input pin of the power management chip through a data transmission line; the power management chip integrates a DC-DC converter, a battery charging manager and a power timing controller; the output pins VOUT1 and VOUT2 of the power management chip are connected to the power output interface; the protection circuit integrates an overcurrent protector, an overvoltage protector and an undervoltage protector; the output end of the protection circuit is electrically connected to the monitoring pin of the power management chip; the output pin of the protection circuit is connected to the power input pin of each component; the general input / output GPIO pin of the power management chip is connected to the input end of the power status indicator light.

7. The current measuring device of the Internet of Things for power transmission and transformation equipment according to claim 1 is characterized in that: The lightning protection circuit (7) comprises a lightning arrester, an overvoltage protector, a discharge tube, a suppression inductor and a filter; the lightning arrester is made of a metal oxide MOV; the metal oxide MOV is composed of zinc oxide, tungsten and zirconium; the lightning arrester is electrically connected to the input end and the ground wire of the circuit; the output ends of the lightning arrester, the overvoltage protector and the discharge tube are connected to the ground wire; the input pin of the lightning arrester is connected to the power supply line of the circuit; The suppression inductor is connected to the power line of the circuit to limit current fluctuation and stabilize voltage; the output end of the filter is connected to the load end of the circuit.

8. The current measuring device of the Internet of Things for power transmission and transformation equipment according to claim 1, characterized in that: The protective shell (10) is made of a polycarbonate material; the interior of the protective shell (10) is covered with a carbon nanotube shielding layer.

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