Measuring unit used on measuring switch

Abstract

The utility model relates to the technical field of measuring switches, and discloses a measuring unit used on a measuring switch. The utility model discloses a measuring unit, and aims to solve the problems of unstable connection, inconvenience in assembly and disassembly, space occupation and the like due to the fact that circuit boards are in common electric connection in a traditional measuring unit. The measuring unit comprises a function board and a metering board, the function board and the metering board are connected through a first connector arranged on the function board and a second connector arranged on the metering board in a plugging mode, the first connector adopts a single-row pin, and the second connector adopts a single-row socket. A rapid and reliable connection mode is provided, assembly and disassembly between the circuit boards are facilitated, space occupation is reduced, and the compactness of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement switches, in particular to a measurement unit used on a measurement switch. Background Art

[0002] With the rapid development of power communication technology, the thermal magnetic circuit breaker used in the traditional power system only plays the role of controlling the on-off of the circuit in the line. With the development of the power grid, there are higher requirements for the power measurement, event reporting, and local or remote interaction of measurement data at each node of the power grid. The traditional thermal magnetic circuit breaker cannot meet the above development needs, and a new generation of intelligent measurement switches with data analysis and communication functions emerge as the times require. The measurement unit is a part of the intelligent measurement switch and is responsible for functions such as data processing, up and down communication, and maintenance.

[0003] In the traditional measurement unit, ordinary electrical connections are used between circuit boards, which have problems such as unstable connections, inconvenient assembly and disassembly, and occupying space. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a measurement unit used on a measurement switch. The function board and the metering board of the measurement unit are connected by plugging and unplugging, which solves the problems of inconvenient disassembly and assembly and unstable connection between circuit boards, and saves space at the same time.

[0005] To solve the above problems, a first aspect of the utility model provides a measurement unit used on a measurement switch, and the measurement unit includes: a function board and a metering board;

[0006] The function board and the metering board are connected by plugging and unplugging through a first connector provided on the function board and a second connector provided on the metering board;

[0007] The first connector uses single-row pins, and the second connector uses a single-row socket.

[0008] Preferably, the metering board includes a voltage sampling unit, a current sampling unit, and a metering chip. The voltage sampling unit is connected to the metering chip, the current sampling unit is connected to the metering chip, and the metering chip is connected to the function board.

[0009] Preferably, the metering board further includes a conversion module, the conversion module is connected to the function board, and the conversion module converts alternating current into direct current and transmits it to the function board.

[0010] Preferably, the conversion module includes a conversion part, a first voltage transformation part, and a second voltage transformation part;

[0011] The inlet end of the conversion part is connected to the incoming line end of the measurement switch, and the outlet end of the conversion part is respectively connected to the inlet ends of the first voltage transformation part and the second voltage transformation part. The conversion part converts the alternating current in the circuit into direct current;

[0012] The first voltage transformation part steps down the voltage output by the conversion part to form a first power supply, and the first power supply is connected to the function board;

[0013] The second voltage transformation part steps down the voltage output by the conversion part to form a second power supply. The second power supply supplies power to the entire measurement unit, and the voltage of the second power supply is lower than the voltage of the first power supply.

[0014] Preferably, the conversion module further includes a third voltage transformation part and a fourth voltage transformation part;

[0015] The third voltage transformation part and the fourth voltage transformation part are connected in series. The third voltage transformation part is connected to the function board, and the fourth voltage transformation part is connected to the first power supply.

[0016] Preferably, the function board includes a main control chip electrically connected to the function board, and the main control chip is electrically connected to the metering chip.

[0017] Preferably, the function board further includes an HPLC-HPRF module. The HPLC-HPRF module is connected to the first power supply, and the HPLC-HPRF module is pluggable to the function board.

[0018] Preferably, the function board further includes a characteristic current sending module connected to the HPLC-HPRF module. The characteristic current sending module acquires and identifies the current signal output by the HPLC-HPRF module.

[0019] Preferably, the function board further includes a Bluetooth module, an ESAM module, and an RS485 module electrically connected to the function board;

[0020] The Bluetooth module is electrically connected to the main control chip and is used for remotely monitoring or controlling the measurement switch;

[0021] The ESAM module is electrically connected to the main control chip. The ESAM module is used to receive the instructions of the main control chip and perform data reading, writing, and encryption;

[0022] The RS485 module is electrically connected to the main control chip, and the RS485 module performs data sending and receiving with the main control chip.

[0023] Preferably, the function board further includes a first storage module and a second storage module electrically connected to the main control chip. The first storage module is a read-only memory, and the second storage module is a flash memory.

[0024] The above technical solution of the utility model has the following beneficial technical effects:

[0025] 1. The function board and the metering board of the measurement unit are connected in a pluggable manner. At the same time, a single-row socket and pins are used to achieve the electrical connection between the circuit boards of the measurement unit, providing a fast and reliable connection method, facilitating the assembly and disassembly between the circuit boards, and also helping to reduce space occupation and improve the compactness of the device.

[0026] 2. By setting a pluggable HPLC-HPRF module on the function board, the HPLC-HPRF module is connected to the function board as a relatively independent module, which is conducive to the flexible design of the measurement switch. At the same time, during the maintenance and replacement of the HPLC-HPRF module, the impact on the entire measurement switch is reduced; in addition, the pluggable connection helps to maintain the stable operation of the module and extend its service life.

[0027] 3. By setting the connection of each module of the function board and the metering board, a conversion part and multiple voltage transformation parts are set on the metering board to form multiple power supplies with different voltages, so that each module of the measurement unit is adapted to a suitable power supply, improving the overall performance and service life of the measurement switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a system diagram of the measurement unit according to the first embodiment of the utility model;

[0029] Figure 2 is an overall structural schematic diagram of the measurement unit according to the first embodiment of the utility model;

[0030] Figure 3 shows a structural schematic diagram of the metering board according to the first embodiment of the utility model;

[0031] Figure 4 is a structural schematic diagram of the function board according to the first embodiment of the utility model;

[0032] LIST OF REFERENCE NUMERALS

[0033] 1. Function board; 11. Main control chip; 12. HPLC-HPRF module; 13. Bluetooth module; 14. ESAM module; 15. RS485 module;

[0034] 2. Metering board; 21. Voltage sampling module; 22. Current sampling module; 23. Metering chip;

[0035] 3. First connector; 4. Second connector. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present utility model. In addition, in the following descriptions, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0037] The schematic diagram of the layer structure according to an embodiment of the present utility model is shown in the accompanying drawings. These figures are not drawn to scale, where for the purpose of clarity, some details are enlarged and some details may be omitted. The various regions, the shapes of the layers, and their relative sizes and positional relationships shown in the figures are merely exemplary, and in practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0038] Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0039] In the description of the present utility model, it should be noted that the terms "first", "second", "third" and "fourth" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0040] The technical solution of the present utility model will be described in detail below with reference to the accompanying drawings. An embodiment of the present utility model provides a measuring unit used on a measuring switch, as Figure 1 and Figure 2 shown, Figure 1 is the system diagram of the measuring unit of an embodiment, Figure 2It is a schematic diagram of the overall structure of the measurement unit. The measurement unit includes a function board 1 and a metering board 2. The function board 1 and the metering board 2 are connected by plugging and unplugging through a first connector 3 provided on the function board 1 and a second connector 4 provided on the metering board 2. In a preferred case, the first connector 3 uses single-row pins, and the second connector 4 uses a single-row socket. Through such a setting, the electrical connection between the circuit boards of the measurement unit is realized, providing a fast and reliable connection method, facilitating the assembly and disassembly between the circuit boards, and at the same time helping to reduce space occupancy and improve the compactness of the device. It should be noted that the number of the first connector 3 and the second connector 4 is not limited here. The number and arrangement positions of the first connector 3 and the second connector 4 can be determined according to the actual layout of the function board 1 and the metering board 2. The number of pins of a single first connector 3 and the number of sockets of the second connector 4 are also not limited. It can also be that the first connector 3 is set as a single-row socket and the second connector 4 is set as single-row pins, as long as the number of pins of a single corresponding first connector 3 and the second connector 4 is the same to meet the plugging and unplugging requirements to realize the connection between the function board 1 and the metering board 2. Further, the first connector 3 and the second connector 4 support hot plugging. Among them, the function board 1 is responsible for the system control and information interaction of the entire measurement unit. The metering board 2 is used for data processing of metering information and transmitting it to the function board 1, and at the same time converting the current input into the measurement unit into the voltage required for the operation of each module.

[0041] Combined with Figure 1 and Figure 3 , Figure 3 is a schematic diagram of the structure of the metering board 2 in an embodiment. The metering board 2 includes a voltage sampling module 21, a current sampling module 22, and a metering chip 23. The voltage sampling module 21 is connected to the metering chip 23 and is used to reduce the voltage required at the sampling port of the metering chip 23, thereby determining the actual voltage value of the three-phase voltage. In a preferred case, the voltage sampling module 21 is responsible for dividing the three-phase voltage signal through a resistor to reduce it to the voltage required at the voltage sampling ADC sampling port of the metering chip 23. By monitoring the voltage at the ADC port, the actual voltage value of the three-phase voltage can be indirectly known. Further, the electronic devices participating in voltage metering are respectively a sampling resistor, a filtering resistor-capacitor, and the metering chip 23; the current sampling module 22 is connected to the metering chip 23 and is used to obtain the current magnitude of each phase of the current measurement switch at present. In a preferred case, the current sampling module 22 is responsible for receiving the current signal input by the current transformer in the current measurement switch, passing it through the current sampling resistor, and inputting it to the ADC current measurement pin of the metering chip 23. By monitoring the current at the ADC port, the current magnitude of each phase of the current measurement switch at present can be indirectly calculated. Further, the devices participating in current measurement are respectively a current sampling resistor, a filtering resistor-capacitor, and the metering chip; the metering chip 23 is connected to the function board 1 to realize the communication between the function board 1 and the metering board 2.

[0042] Combined with Figure 1 , in a preferred case, the metering board 2 further includes a conversion module, the conversion module is connected to the function board 1, and the conversion module converts alternating current into direct current and supplies it to the function board 1. Further, the conversion module includes a conversion unit, Figure 1 AC-DC in; a first voltage conversion unit, Figure 1 DC-DC1 in; and a second voltage conversion unit, Figure 1 DC-CD2 in. The inlet end of the conversion unit is connected to the incoming line end of the measurement switch, the outlet end of the conversion unit is respectively connected to the inlet ends of the first voltage conversion unit and the second voltage conversion unit, the conversion unit converts the alternating current in the circuit into direct current, the first voltage conversion unit reduces the voltage output by the conversion unit to form a first power supply, the first power supply is connected to the function board, the second voltage conversion unit reduces the voltage output by the conversion unit to form a second power supply, and the second power supply supplies power to the entire measurement unit. The voltage of the second power supply is lower than that of the first power supply. In this embodiment, the voltage of the first power supply is 12V and the voltage of the second power supply is 3.3V. Power supplies with different voltages supply power to modules with different rated voltages, so that each module can work in the optimal voltage range, and thus the performance of each module is the best. It should be noted that the voltage values of the first power supply and the second power supply are not limited here, and the voltage conversion design can be carried out according to the voltage requirements of the modules in the measurement switch. Nor is the connection relationship between the first power supply, the second power supply and the modules limited, and the connection with different power supplies can be selected according to the actual voltage requirements of each module in the measurement switch. Further, the conversion module further includes a third voltage conversion unit, Figure 1 DC-DC3 in; a fourth voltage conversion unit, Figure 1 DC-DC4 in. The third voltage conversion unit and the fourth voltage conversion unit are connected in series. The third voltage conversion unit is connected to the function board 1, and the fourth voltage conversion unit is connected to the first power supply. Through such a setting, the third voltage conversion unit can lead the electric energy flowing through the function board 1 to the metering board 2 and perform voltage conversion processing, and then the fourth voltage conversion unit changes the voltage to the same as that of the first power supply. Further, a super capacitor is arranged between the third voltage conversion unit and the fourth voltage conversion unit, and the super capacitor is charged during operation. Through such a setting, when the main circuit is disconnected, the super capacitor can also boost the voltage through the fourth voltage conversion unit, and then supply power to the first power supply to continue to supply power to the function board 1 to maintain the operation of the function board 1 for a period of time. It should be noted that the specifications of the super capacitor are not limited here, and the super capacitor is not a necessary setting. In an optional case, the third voltage conversion unit and the fourth voltage conversion unit can be simply connected without setting a capacitor. Through such a setting, the current of the function board 1 is led into the metering board 2, and the overall circuit operation situation can be further obtained.

[0043] Combined with Figures 1 to 4, in a preferred scenario, the function board 1 includes a main control chip 11 electrically connected to the function board. The main control chip 11 is electrically connected to the metering chip 23. Through such a setting, the main control chip 11 is responsible for the control of the entire measurement switch, and collects data through the metering chip 23 and transmits it to the main control chip 11 to realize the communication between the function board 1 and the metering board 2. In an alternative scenario, a bidirectional SPI4-MCU master interface and a unidirectional SPI3-MCU slave interface are adopted between the main control chip 11 and the metering chip 23 to ensure more stable communication between the metering chip 23 and the main control chip 11. Further, the function board further includes an HPLC-HPRF module 12. The HPLC-HPRF module 12 is connected to the first power supply, and the HPLC-HPRF module 12 and the function board 1 are pluggable. Among them, the HPLC-HPRF module 12 is a dual-mode power communication module, which sends relevant data of the measurement unit to the concentrator in the power grid and reports functions such as power outage events. Further, the function board 1 further includes a characteristic current sending module connected to the HPLC-HPRF module 12. The characteristic current sending module acquires and identifies the current signal output by the HPLC-HPRF module 12. It should be noted that in a preferred scenario, serial communication is achieved through the connection between the HPLC-HPRF module 12 and the main control chip 11 via a UART interface. Further, the function board 1 further includes a Bluetooth module 13, an ESAM module 14, and an RS485 module 15 electrically connected to the function board 1. The Bluetooth module 13 is electrically connected to the main control chip 11 and is used for remote monitoring or control of the measurement switch. In an alternative scenario, serial communication is achieved through the connection between the Bluetooth module 13 and the main control chip 11 via a UART interface; the ESAM module 14 is electrically connected to the main control chip 11. The ESAM module 14 is used to receive instructions from the main control chip 13 and perform data reading, writing, and encryption. Similarly, serial communication is achieved through the connection between the ESAM module 14 and the main control chip 11 via a UART interface; the RS485 module 15 is electrically connected to the main control chip 11. The RS485 module 15 performs data transceiver with the main control chip 11. In a preferred scenario, the RS485 module 15 is divided into a 485Ι serial port and a 485Π serial port. Among them, the 485Ι serial port is a maintenance port and a meter reading port, and 485 communication is carried out with the measurement unit through the upper computer to read the meter data connected to the measurement switch, store the data, and report the meter data through the HPLC-HPRF module 12; the 485Π serial port is a meter reading port, which reads the meter data connected to the measurement switch, stores the data, and reports the meter data through the HPLC-HPRF module 12; through such a setting, the accuracy and reliability of the meter data are ensured. Further, the function board 1 further includes a first storage module and a second storage module electrically connected to the main control chip 11. The first storage module is a read-only memory, and the second storage module is a flash memory.It should be noted that the connection method between each module on the function board 1 and the main control chip 11 is not limited here. It can be a UART interface or an SPI-MCU interface, or other methods that can achieve data transmission or connection. Among them, the ESAM module 14 is an electronic security access module, which is used to provide security access control, manage user authentication and authorization, enhance the security of the device, and ensure that only authorized users can access sensitive data or functions; the RS485 module 15 is a communication chip, which is used to achieve long-distance and highly reliable serial communication between devices and support communication between multiple devices. Optionally, the function board 1 can also be provided with a clock chip to provide a time reference for synchronizing the timing operations inside the device, ensuring that the device executes operations in the correct time sequence, and providing timestamp and time synchronization functions.

[0044] In summary, the function board 1 of the measurement unit and the metering board 2 are connected in a pluggable manner. At the same time, a single-row socket and pins are used to achieve the electrical connection between the circuit boards of the measurement unit, providing a fast and reliable connection method, facilitating the assembly and disassembly between the circuit boards, and also helping to reduce space occupancy and improve the compactness of the device. By setting the pluggable HPLC-HPRF module 12 on the function board, the HPLC-HPRF module 12 is connected to the function board as a relatively independent module, which is beneficial to the flexible design of the measurement switch. At the same time, during the maintenance and replacement of the HPLC-HPRF module 12, the impact on the entire measurement switch is reduced; in addition, the pluggable connection helps to maintain the stable operation of the module and extend its service life. By setting the connection of each module of the function board 1 and the metering board 2, a conversion part and multiple voltage transformation parts are set on the metering board 2 to form multiple power supplies with different voltages, so that each module of the measurement unit is adapted to a suitable power supply, improving the overall performance and service life of the measurement switch.

[0045] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modification examples that fall within the scope and boundary of the appended claims, or equivalent forms of such scope and boundary.

Claims

1. A measuring unit used on a measuring switch, characterized in that, The measurement unit includes: a function board and a metering board; The function board and the metering board are connected by plugging and unplugging through a first connector arranged on the function board and a second connector arranged on the metering board; The first connector uses single-row pins, and the second connector uses a single-row socket.

2. The measurement unit according to claim 1, characterized in that, The metering board includes a voltage sampling module, a current sampling module and a metering chip. The voltage sampling module is connected to the metering chip, the current sampling module is connected to the metering chip, and the metering chip is connected to the function board.

3. The measuring unit according to claim 2, characterized in that, The metering board further includes a conversion module. The conversion module is connected to the function board, and the conversion module converts alternating current into direct current and supplies it to the function board.

4. The measurement unit according to claim 3, characterized in that, The conversion module includes a conversion part, a first voltage transformation part and a second voltage transformation part; The inlet end of the conversion part is connected to the incoming line end of the measurement switch, the outlet end of the conversion part is respectively connected to the inlet ends of the first voltage transformation part and the second voltage transformation part, and the conversion part converts the alternating current in the circuit into direct current; The first voltage transformation part reduces the voltage output by the conversion part to form a first power supply, and the first power supply is connected to the function board; The second voltage transformation part reduces the voltage output by the conversion part to form a second power supply. The second power supply supplies power to the whole measurement unit, and the voltage of the second power supply is lower than the voltage of the first power supply.

5. The measuring unit according to claim 4, characterized in that, The conversion module further includes a third voltage transformation part and a fourth voltage transformation part; The third voltage transformation part and the fourth voltage transformation part are connected in series. The third voltage transformation part is connected to the function board, and the fourth voltage transformation part is connected to the first power supply.

6. The measuring unit according to claim 5, wherein The function board includes a main control chip electrically connected to the function board, and the main control chip is electrically connected to the metering chip.

7. The measuring unit according to claim 6, characterized in that, The function board further includes an HPLC-HPRF module. The HPLC-HPRF module is connected to the first power supply, and the HPLC-HPRF module and the function board are pluggable.

8. The measuring unit according to claim 7, characterized in that, The function board further includes a characteristic current sending module connected to the HPLC-HPRF module. The characteristic current sending module acquires and identifies the current signal output by the HPLC-HPRF module.

9. The measurement unit according to claim 8, characterized in that, The function board further includes a Bluetooth module, an ESAM module and an RS485 module electrically connected to the function board; The Bluetooth module is electrically connected to the main control chip and is used for remotely monitoring or controlling the measurement switch; The ESAM module is electrically connected to the main control chip. The ESAM module is used for receiving the instructions of the main control chip and performing data reading, writing and encryption; The RS485 module is electrically connected to the main control chip, and the RS485 module performs data sending and receiving with the main control chip.

10. The measuring unit according to claim 6, characterized in that, The function board further includes a first storage module and a second storage module electrically connected to the main control chip. The first storage module is a read-only memory, and the second storage module is a flash memory.

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