CN110865313A - Charging station electric leakage monitoring system - Google Patents

Abstract

The invention relates to a leakage monitoring system for a charging station. The leakage monitoring system for a charging station includes a collector, a handheld mobile terminal and a server; the collector realizes leakage measurement and uploads it to the server, and the handheld mobile terminal connects the server and the collector through a network. The server implements data transfer and storage functions; the collector includes an amplifying differential circuit, a dedicated measurement circuit, an MCU module, a GPRS network module, a DC/DC power conversion module, a charging circuit and a power management module.

Description

A charging station leakage monitoring system

technical field

The invention relates to the technical field of leakage monitoring of charging stations, in particular to a leakage monitoring system of charging stations.

Background technique

Increasing the development of new energy vehicles is of great significance to ensuring energy security, promoting energy conservation and emission reduction, and preventing and controlling air pollution. Vigorously promoting the infrastructure construction of new energy vehicle charging and swapping stations is an important guarantee for the development of the new energy vehicle industry. However, when the power supply line of the new energy vehicle charging and swapping station is laid, the power supply insulation wire skin is easy to be scratched, and there is a hidden danger of leakage; and because it is laid outdoors, it is more prone to leakage when it encounters rain and humidity; although the charging and swapping station is installed. Intelligent general insurance or leakage protector, through these intelligent devices, can monitor and protect the residual current in the charging station in real time, which greatly improves the supervision of the residual current. However, if the leakage current is too large, the general insurance or leakage protector will automatically trip, and the leakage point cannot be quickly investigated, which will inevitably affect the normal operation of the charging station.

At present, there are products such as leakage current checking equipment, residual current equipment and grounding resistance tester in the market, which are only used for a single product; although the operation is simple, it is time-consuming and laborious to thoroughly check the leakage current position and eliminate the leakage danger from the root. ; There is also a leakage current online detection system, which needs to be installed when the power supply line is laid, but because it is a fixed product, it must be installed to each line. The investment cost is high. The traditional leakage current detection technology has the problem of low efficiency and poor comprehensiveness in the leakage current investigation. And there is no leakage detection equipment for special places of new energy vehicle charging and swapping stations.

At present, in the current leakage measurement, only single-point, single-time one-dimensional leakage current measurement can be realized, but when applied to the charging and swapping station of new energy vehicles, it is impossible to achieve such a multi-branch and leakage current that is affected by the change of the load. The purpose of monitoring, and the leakage current in such an environment is easily affected by the on-site environment, thus affecting the accuracy of the leakage measurement.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a charging station leakage monitoring system, which adopts distributed leakage current sampling, realizes unified data viewing and comparison through network communication, can record leakage data at various time points online, and realizes three-dimensional leakage data detection and statistics. .

In order to solve the above problems, the present invention provides a charging station leakage monitoring system, the charging station leakage monitoring system includes a collector, a handheld mobile terminal and a server; the collector realizes leakage measurement and uploads it to the server, and the handheld mobile terminal The network connection server communicates with the collector, and the server realizes the functions of data transfer and storage.

The charging station leakage monitoring system provided by the present invention also has the following technical features:

Further, the collector includes an amplifying differential circuit, a dedicated measurement circuit, an MCU module, a GPRS network module, a DC/DC power conversion module, a charging circuit and a power management module.

Further, the collector transmits the measured data to the cloud server through GPRS communication, and the mobile terminal device accesses the cloud server through the network, reads the data measured by the collector, and sends control instructions to the collector through the server; if If there is a problem of leakage current exceeding the limit, the notification alarm information can be displayed through the terminal.

Further, the hardware of the charging station leakage monitoring system includes a measurement chip ADE, a main MCU STM32, and a GPRS communication module.

Further, the measurement chip ADE has two working modes: automatic measurement with a wide range can be completed, and under the control of the MCU, complete data measurement, the measurement chip ADE transmits the data to the MCU through SPI communication. Data processing analysis.

Further, the collector and the clamp meter are of an integrated structure, so that the inaccuracy of the clamp meter measurement can be avoided;

Further, the collector box is a waterproof and dustproof instrument case, and the collector can reach IP56 protection level; it is not restricted by the environment during use.

Further, the clamp meter includes two specifications of φ40 and φ68, which are suitable for different threading holes.

Further, the plastic instrument box of the leakage monitoring system of the charging station is a fully enclosed design structure, which has the advantages of dustproof and moisture-proof.

Further, the collector is separately installed in the charging slot of the main box, and can be separately installed in the charging slot of the main box.

Further, the charging device and the instrument case are designed in an integrated manner, and the collection box is placed in the instrument case and connected to the power supply to directly charge the collector without wiring.

Further, the collector adopts a buttonless design; after the collector is put into the instrument case, it is automatically turned off, and after it is taken out, it is automatically turned on.

The key components involved in the invention of the invention, ADE7953, GPRS module (USR-GPRS232-7S2), high-precision current clamp ETCR040 and ETCR068, power adapter GS90A12-P1M and other components, should be qualified products from regular manufacturers.

Further, the relevant description of the present invention is as follows:

The leakage current signal is collected by a high-precision leakage current test clamp; the measured leakage current signal is transmitted to the AD measurement chip through a professional amplification and differential circuit for data analog/digital conversion, calculation and processing.

GPRS channel: The MCU receives the data transmission processed by AD, compares and packs it, and transmits it to the cloud server through the GPRS module through the wireless channel.

Power supply part: The large-capacity polymer lithium battery is used, which can meet the long-term online operation of the collector and is the source power for online leakage monitoring.

Charging part: each collector adopts split intelligent charging; their respective currents do not affect each other; intelligent charging protects the lithium battery during the charging process, effectively ensuring the working life of the lithium battery.

Structural design: The current clamp adopts two specifications, which are suitable for the clamping of different laying pipes; the collector box is integrated with the clamp meter, which facilitates quick installation or placement on site; the integrated charging device is integrated with the chassis, and the collector is placed in the In the box, plug in the power supply to charge 10 collectors, which not only satisfies the recycling and placement of the equipment, but also prevents users from forgetting to charge.

Regarding data measurement, the measurement part adopts professional measurement chip ADE, which can complete automatic measurement with a wide range; and under the control of MCU, complete data measurement; data is transmitted to MCU through SPI communication for data processing and analysis.

Regarding the GPRS wireless communication module, the wireless communication module adopts the GPSR IoT module of Jinan Renren Technology; the completed data is uploaded to the server through the GPRS channel; and the control commands are received through the GPRS channel.

Regarding the power supply, the external use of MEAN WELL's dedicated power adapter provides 12 DC power supply; the inside of the instrument uses TI's special lithium battery charging management chip and voltage conversion chip to charge the lithium battery and convert the power supply voltage to provide the normal operation of the instrument. Assure.

The hardware equipment created by the invention has the following functions: leakage current detection; uploading test data to a network server through a GPRS module; network punctuality; and current error software correction.

The functions completed by the MCU created by the invention are: leakage current detection, data uploading regularly; network punctuality; current error software correction.

The communication method and relationship created by the present invention:

A. Main MCU and GPRS: used for GPRS wireless network to upload leakage data to the network server, receive server control commands, and use UART3 for communication.

B. Main MCU and LED: use basic 1O control to indicate running status, GPRS network connection status, and satellite positioning status.

C. Main MCU and ADE7878: Use SPI to read leakage data.

D. Main MCU and GPS module: used for satellite positioning, timing, communication using UART1 for communication.

The use of the MCU internal module created by the present invention: the use of the timer:

a) SysTick_Handler: Generate a 1ms timing, complete the second timing function through the counter

b) The use of on-chip FLASH:

Device marking: Use the information area 0x08019000-0x08019801 of the on-chip FLASH.

Device ID: Use the information area of the on-chip FLASH 0x08019002-0x08019805.

Correction value: use the information area of the on-chip FLASH 0x08019006-0x08019808.

c) Use of SPI: SPI1 is used for ADE communication.

d) Use of common IO port: IO port needs to be controlled for LED control

e) System clock: The system uses an external 8MHz crystal oscillator. After frequency multiplication, the system main clock uses 72MHz.

The software involved in the creation of the present invention is divided into the following three parts: APP (Android) software, MCU program, and server software, which are respectively introduced as follows:

The APP (Android) software is responsible for the display of the interface, and accepts the user's operation instructions, issues corresponding control commands, and the meter controls the collector to perform corresponding measurement operations. It can save and view measurement data, upload instructions to the server, and accept the data downloaded by the server.

The MCU program is responsible for: 1) real-time monitoring and measurement of leakage current data; 2) actively uploading data with alarm information; actively uploading data when measuring time; 3) receiving server instructions, controlling measurement and uploading communication time, and changing the collector time.

The server program is responsible for: 1) linking the mobile terminal to receive its operation instructions and responding accordingly; 2) linking the collector and sending the measurement instructions required by the terminal; receiving the data uploaded by the collector; 3) saving the measurement data uploaded by the collector; Terminal query; 4) The bridge mobile terminal communicates with the collector.

The present invention has the following beneficial effects: in conjunction with specific technical means, there are the following points:

1. The present invention provides a leakage monitoring system for a charging station. The first point is to arm at multiple points and simultaneously monitor the leakage current of the main trunk line of the charging station, each branch line, and the leakage current in the line between the trunk line and the branch line.

2. Using the Internet of Things technology, use the Internet of Things card to transmit real-time data between the leakage collector and the mobile APP, and the leakage data can be transmitted to the mobile APP in real time. Develop leakage detection mobile phone APP software, which can monitor leakage detection by multiple people, analyze test data, and draw test data graphs.

3. On each leakage module, the distributed charging management application is adopted to realize the independent charging of each leakage module, and prevent each module from influencing and interfering with each other.

Description of drawings

1 is a schematic diagram of a collector of a charging station leakage monitoring system according to an embodiment of the present invention;

2 is a schematic diagram of a networked measurement system of a charging station leakage monitoring system according to an embodiment of the present invention;

3 is a schematic diagram of a hardware system of a charging station leakage monitoring system according to an embodiment of the present invention;

4 is a schematic structural diagram of a collector terminal host of a charging station leakage monitoring system according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of the overall structure of a charging station leakage monitoring system according to an embodiment of the present invention;

6 is a schematic diagram of the connection between the MCU and the peripherals of a charging station leakage monitoring system according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a main class structure relationship of a charging station leakage monitoring system according to an embodiment of the present invention;

8 is a functional flowchart of a main function of a charging station leakage monitoring system according to an embodiment of the present invention;

9 is a schematic structural diagram of a system initialization function of a charging station leakage monitoring system according to an embodiment of the present invention;

10 is a schematic structural diagram of a system operation main loop function of a leakage monitoring system for a charging station according to an embodiment of the present invention;

11 is a schematic diagram of a serial port sending process of a charging station leakage monitoring system according to an embodiment of the present invention;

12 is a schematic diagram of a serial port receiving process of a charging station leakage monitoring system according to an embodiment of the present invention;

13 is a schematic diagram of a serial communication processing flow diagram of a charging station leakage monitoring system according to an embodiment of the present invention;

14 is a schematic diagram of second clock processing of a charging station leakage monitoring system according to an embodiment of the present invention;

FIG. 15 is an overall design framework diagram of a networking system of a charging station leakage monitoring system according to an embodiment of the present invention;

16 is a schematic diagram of an amplifier power supply circuit of a leakage monitoring system for a charging station according to an embodiment of the present invention;

17 is a schematic diagram of an ADE digital-to-analog conversion circuit of a charging station leakage monitoring system according to an embodiment of the present invention;

18 is a schematic diagram of a current measurement amplifying circuit of a charging station leakage monitoring system according to an embodiment of the present invention;

19 is a schematic diagram of an MCU circuit of a charging station leakage monitoring system according to an embodiment of the present invention;

20 is a schematic diagram of a programming interface circuit of a charging station leakage monitoring system according to an embodiment of the present invention:

21 is a schematic diagram of a power-on reset circuit of a charging station leakage monitoring system according to an embodiment of the present invention;

22 is a schematic diagram of a hardware watchdog circuit of a charging station leakage monitoring system according to an embodiment of the present invention;

23 is a schematic diagram of a main MCU power supply circuit of a charging station leakage monitoring system according to an embodiment of the present invention;

24 is a schematic diagram of a key connection circuit of a leakage monitoring system for a charging station according to an embodiment of the present invention;

25 is a schematic diagram of an in-system charging circuit of a leakage monitoring system for a charging station according to an embodiment of the present invention;

26 is a schematic diagram of a 5V power supply conversion circuit of a charging station leakage monitoring system according to an embodiment of the present invention;

27 is a schematic diagram of a 3.3V power supply conversion circuit of a charging station leakage monitoring system according to an embodiment of the present invention;

28 is a schematic diagram of a 485 communication circuit of a leakage monitoring system for a charging station according to an embodiment of the present invention;

29 is a schematic diagram of a buzzer circuit of a leakage monitoring system for a charging station according to an embodiment of the present invention;

30 is a schematic circuit diagram of a GPRS module of a charging station leakage monitoring system according to an embodiment of the present invention;

31 is a schematic diagram of an RTC temperature-compensated clock circuit of a charging station leakage monitoring system according to an embodiment of the present invention;

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

As shown in Figures 1-6, the present invention provides a charging station leakage monitoring system. The charging station leakage monitoring system includes a collector, a handheld mobile terminal and a server; the collector realizes leakage measurement and uploads it to the server, and the handheld The mobile terminal communicates with the collector through a network connection to the server, and the server realizes the functions of data transfer and storage.

When the invention is created and implemented, the first point is that the invention provides a leakage monitoring system for a charging station. The first point is to arm at multiple points, and simultaneously monitor the leakage current of the main line of the charging station, each branch line, and the leakage current in the line between the trunk line and the branch line; The second point is to adopt the Internet of Things technology, and use the Internet of Things card to transmit real-time data between the leakage collector and the mobile APP, and the leakage data can be transmitted to the mobile APP in real time. The third point is to use distributed charging management application on each leakage module to realize the independent charging of each leakage module, and prevent each module from influencing and interfering with each other. .

In an embodiment of the present application, the collector includes an amplifying differential circuit, a dedicated measurement circuit, an MCU module, a GPRS network module, a DC/DC power conversion module, a charging circuit and a power management module.

In an embodiment of the present application, the collector transmits the measured data to the cloud server through GPRS communication, and the mobile terminal device accesses the cloud server through the network, reads the data measured by the collector, and sends control instructions through the server. It is transmitted to the collector; if there is a problem of leakage current exceeding the limit, the notification alarm information can be displayed through the terminal.

In an embodiment of the present application, the hardware of the charging station leakage monitoring system includes a measurement chip ADE, a main MCU STM32, and a GPRS communication module.

In an embodiment of the present application, the measurement chip ADE has two working modes: automatic measurement with a wide range can be completed, and under the control of the MCU, complete data measurement, the measurement chip ADE communicates through SPI Send the data to the MCU for data processing and analysis.

In an embodiment of the present application, the collector and the clamp meter are an integrated structure, so that inaccuracy of the clamp meter measurement can be avoided;

In an embodiment of the present application, the collector box is a waterproof and dustproof instrument case, and the collector is used to achieve IP56 protection level; it is not restricted by the environment during use.

In an embodiment of the present application, the clamp meter includes two specifications of φ40 and φ68, which are suitable for different threading holes.

In an embodiment of the present application, the plastic instrument box of the leakage monitoring system of the charging station is a fully enclosed design structure, which has the advantages of dustproof and moisture-proof.

In an embodiment of the present application, the collector is separately installed in the charging slot of the main box, and can be separately installed in the charging slot of the main box.

In an embodiment of the present application, the charging device and the instrument case are designed in an integrated manner, and the collection box is placed in the instrument case and connected to the power supply to directly charge the collector without wiring.

In an embodiment of the present application, the collector adopts a buttonless design; after the collector is put into the instrument case, it is automatically turned off, and after it is taken out, it is automatically turned on.

In the program design idea in an embodiment of the present application, the program is written in C, with modular design and good portability; in order to further improve the portability of the system code, the following definition is used in the CPU.H file:

typedef unsigned char BOOL; // for logical variables

typedef signed char int8; //8-bit signed integer

typedef signed short int int16; //16-bit signed integer

typedef signed int int32; //32-bit signed integer

typedef signed _int64 int64; //64-bit signed integer

typedef unsigned char uint8; //8-bit unsigned integer

typedef unsigned short int uint16; //16-bit unsigned integer

typedef unsigned int uint32; //32-bit unsigned integer

typedef unsigned _int64 uint64; //64-bit unsigned integer

As shown in FIG. 7 , in an embodiment of the present application, the main class structure relationship is designed, which defines the relationship between main classes and classes in the system, and reflects the system architecture diagram.

As shown in FIG. 8 , in an embodiment of the present application, the main function flow chart is divided into two parts: initialization and system operation. The initialization part initializes the modules and off-chip components used in the system. , the main background work of the system will be implemented in the system running function.

As shown in FIG. 9, in an embodiment of the present application, the system initializes the function structure.

As shown in FIG. 10, in one embodiment of the present application, the system runs the main loop function structure.

As shown in FIG. 11 , in an embodiment of the present application, the serial port sends a process.

As shown in FIG. 12 , in an embodiment of the present application, the serial port receives the process.

As shown in FIG. 13 , in an embodiment of the present application, the serial port communication processing flow.

As shown in FIG. 14, in one embodiment of the present application, the second clock is processed.

In an embodiment of the present application, the overall design framework of the system is shown in Figure 15. The system realizes the remote transmission of data and commands through the NB-IoT network, and realizes remote monitoring and early warning of the leakage current of the charging station. The system adopts NB-IoT network, which is a single-hop cellular network. The leakage detection module communicates directly with the terminal server, and the terminal server can directly communicate with each leakage detection module to realize multi-line detection. The system uses two modes: mobile terminal and cloud server. Monitoring conditions are monitored and controlled. The mobile terminal is the APP software based on the Android system. The APP supports multiple people to monitor the monitoring results online at the same time, and set the relevant parameters of the monitoring system according to the needs. The cloud server is a server based on cloud technology. Due to the use of cloud technology, it can monitor and analyze the monitored data for a long time. As shown in Figure 15, the core part of the control module is the embedded microprocessor MCU. The embedded microprocessor is ARM Cortex-M4. The ARM Cortex-M4 processor is the latest embedded processor specially developed by ARM. To address the digital signal control market that requires a mix of effective and easy-to-use control and signal processing functions. The efficient signal processing function of ARMCortex-M4 can meet the needs of power management, NB-loT interaction and other functions in this system. Each leakage acquisition of the charging station leakage detection system is equipped with a control module. The control module measures the leakage current signal in the circuit with the leakage current collector, passes through professional amplification and differential circuits, and transmits it to the AD measurement chip for analog/digital conversion, calculation and processing, and transmits the data to the MCU of the control unit for analysis by the MCU. It is then transmitted to the mobile terminal and cloud server through the Internet of Things; at the same time, it can also accept commands from the mobile terminal and cloud server to set parameters such as the leakage limit of each leakage collector. The schematic diagram of the control module is shown in Figure 3. Under normal working conditions, the control unit receives the leakage current situation transmitted by the acquisition module without interruption, processes the data, and compares the set leakage current limit after data processing. When the limit is exceeded, the corresponding flag bit is set, and the current leakage value together with the flag bit is stored in the fixed address unit, and the corresponding relay action is controlled to protect the line. The MCU of the control unit polls the leakage current status of the line leakage current acquisition module according to a certain time distance. EEPROM, and report the fault situation to the mobile terminal and cloud server through the NB-IoT module, and the mobile terminal and cloud server can display the leakage current situation in real time;

The wireless communication module of this embodiment is used for communication between the leakage monitoring module and the control module, and the terminal server includes a cloud server and a mobile phone APP; the cloud server mainly analyzes and stores long-term received data; the mobile phone APP is convenient for multiple users to monitor in real time The leakage current situation of each detection point of the charging station, and the leakage current limit value of each detection point is equipped; this embodiment integrates the leakage current collector, the control module and the NB-IoT module to form an independent leakage current acquisition unit. It is convenient for quick installation or placement on site. The charging device of the leakage collecting unit is integrated with the chassis. Put the leakage collecting unit in the box and plug in the power supply to charge it, which not only satisfies the placement of the equipment, but also avoids forgetting to charge;

The monitoring center of the system in this embodiment is mainly established on a remote server, and the development platform of the remote server software system adopts Labview 7.0 of NI Company. This software has a friendly user interface, which can store all the collected data in the database, and Can realize waveform display and analysis. According to the function, it can be divided into communication management module, data display module, data storage module and data query module [3]. On the one hand, the communication management module encapsulates data such as instructions and SIM card numbers into IP packets and sends them to the remote data acquisition module through the GPRS network to start data acquisition; on the other hand, it receives the IP data packets sent by the remote data acquisition module and extracts data from it. Fixed information such as package number, STM card number, time, and measured data. The data display module visually displays the signal characteristics in the form of three-dimensional animation; the data storage module stores the measurement data obtained from the unpacking of the communication management module into the database. The data query module supports authorized users to query historical data;

The system software program of this embodiment performs dynamic simulation display of the entire working process, real-time dynamic data display, real-time data storage, historical data query, over-limit alarm, display alarm record, alarm query, historical report printing, etc., and can also realize network Management, direct permission access in the local area network, and connect to the mobile terminal APP, use the mobile terminal APP to operate; the monitoring software is developed on the Windows operating system, and the monitoring software has the function of automatically and manually querying the leakage detection module; the system works normally After that, when the leakage current in the line exceeds the set leakage current limit or not, the leakage detection module will report the detection data to the monitoring center at the set time interval; The center sends out sound and light alarm signals; when multiple lines have leakage faults at the same time, the frequency of sound and light signals of the monitoring center will be higher than that of a single fault, and the monitoring software will display which lines are faulty; in order to prevent the monitoring center from The data may miss the fault data of some lines. The software of the monitoring center has set the function of checking on time, and the monitoring software checks the situation of the lower line on time according to a certain date. When unrecorded leakage fault data is found, it will be kept in the database, and the alarm function will be activated to help analyze the leakage of the line. The monitoring software sets up the automatic inquiry function on time, and also sets up the manual inquiry function. The operator can start this function to inquire about the leakage current of the line. When querying, the uploaded data is compared with the stored data. If there is no such data, it will be recorded in the database, and the personnel will be reminded that there is a fault in the line. In order to improve the convenience and effectiveness of the system, this system has developed a mobile-based The APP software of the terminal, the APP software can not only receive the data transmitted by the GPRS module of the leakage current acquisition terminal in real time, but also interact with the remote server, accept the data and reports analyzed by the remote server, and can also control the remote server. Leakage detection module.

As shown in FIG. 16 , in an embodiment of the present application, a schematic diagram of an amplifier power supply circuit.

As shown in FIG. 17 , in an embodiment of the present application, a schematic diagram of an ADE digital-to-analog conversion circuit is shown.

As shown in FIG. 18 , in an embodiment of the present application, a schematic diagram of a current measurement amplifying circuit is shown.

As shown in FIG. 19 , in an embodiment of the present application, a schematic diagram of an MCU circuit is shown.

As shown in FIG. 20 , in an embodiment of the present application, a schematic diagram of a programming interface circuit is shown.

As shown in FIG. 21 , in an embodiment of the present application, a schematic diagram of a power-on reset circuit is shown.

As shown in FIG. 22, in an embodiment of the present application, a schematic diagram of a hardware watchdog circuit is shown.

As shown in FIG. 23 , in an embodiment of the present application, a schematic diagram of a main MCU power supply circuit.

As shown in FIG. 24 , in an embodiment of the present application, a schematic diagram of a key connection circuit is shown.

As shown in FIG. 25 , in an embodiment of the present application, a schematic diagram of a charging circuit in the system is shown.

As shown in FIG. 26, in an embodiment of the present application, a schematic diagram of a 5V power supply conversion circuit.

As shown in FIG. 27, in an embodiment of the present application, a schematic diagram of a 3.3V power supply conversion circuit.

As shown in FIG. 28, in an embodiment of the present application, a schematic diagram of a 485 communication circuit.

As shown in FIG. 29, in an embodiment of the present application, a schematic diagram of a buzzer circuit is shown.

As shown in FIG. 30 , in an embodiment of the present application, a schematic circuit diagram of a GPRS module is shown.

As shown in FIG. 31 , in an embodiment of the present application, a schematic diagram of an RTC temperature compensated clock circuit.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A charging station leakage monitoring system is characterized in that: the charging station leakage monitoring system comprises a collector, a handheld mobile terminal and a server; the collector realizes leakage measurement and uploads to the server, and the handheld mobile terminal is connected through a network The server communicates with the collector, and the server realizes the functions of data transfer and storage. 2. The charging station leakage monitoring system according to claim 1, wherein the collector comprises an amplifying differential circuit, a dedicated measurement circuit, an MCU module, a GPRS network module, a DC/DC power conversion module, a charging circuit and a The power management module is composed. 3. The charging station leakage monitoring system according to claim 1, characterized in that: the collector transmits the measured data to the cloud server through GPRS communication, and the mobile terminal device accesses the cloud server through the network, and reads the collector measurement data. The data received, and send control instructions to the collector through the server; if there is a problem of leakage current exceeding the limit, the notification alarm information can be displayed through the terminal. 4. The charging station leakage monitoring system according to claim 1, wherein the hardware of the charging station leakage monitoring system comprises a measurement chip ADE, a main MCU STM32, and a GPRS communication module. 5. The charging station leakage monitoring system according to claim 4, characterized in that: the working modes of the measurement chip ADE are two types: automatic measurement with a wide range can be completed, and under the control of the MCU, complete data measurement , the measurement chip ADE transmits data to the MCU through SPI communication for data processing and analysis. 6 . The leakage monitoring system for a charging station according to claim 1 , wherein the collector and the clamp meter are of an integrated structure. 7 . 7 . The leakage monitoring system of the charging station according to claim 1 , wherein the collector box is a waterproof and dustproof instrument case. 8 . 8 . The leakage monitoring system of a charging station according to claim 1 , wherein the clamp meter includes two specifications of φ40 and φ68. 9 . 9 . The electric leakage monitoring system of a charging station according to claim 1 , wherein the plastic instrument box of the electric leakage monitoring system of the charging station is a fully enclosed design structure. 10 . 10 . The leakage monitoring system of a charging station according to claim 1 , wherein the collector is separately installed in the charging slot of the main box. 11 .

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