Multifunctional electric power meter supporting double network segments

Abstract

The utility model relates to a multifunctional electric power meter supporting double network segments. The multifunctional electric power meter comprises a housing, a main controller board, a coprocessor mainboard, a touch screen and a button module. A main controller, an acquisition unit and a liquid crystal driver are arranged on the main controller board, the acquisition unit is a special three-phase electric energy metering chip, the acquisition unit acquires current and voltage signals through a current and voltage transformer, the main controller adopts an internal FLASH to construct an EEPROM (Electrically Erasable Programmable Read-Only Memory) for data storage, and the main controller controls the display of the touch screen through the liquid crystal driver. The main controller is connected with the key module and communicates with the upper computer through the RS485 transceiver; the coprocessor mainboard is provided with a coprocessor and two super network ports, and the coprocessor realizes a dual-network-segment Ethernet connection function through the two super network ports; and the main controller is communicated with the coprocessor by adopting a high-speed serial bus. The electric power meter is rich in function, can collect and process various electric power parameters, and can carry out simultaneous communication of two different network segments.

Description

Technical Field

[0001] The utility model relates to the field of electric power meters, in particular to a multifunctional electric power meter supporting dual network segments. Background Art

[0002] With the gradual deepening of refined management of enterprises, enterprises have higher and higher requirements for cost control of each process, so it is very necessary to provide an efficient energy management and control system. Energy consumption data information is an important energy consumption point and key indicator of enterprises. Most enterprises have not fully utilized information-based centralized management methods to collect energy consumption information of a workshop or equipment. Without this information, it is impossible to accurately analyze energy consumption and cost in the production process, resulting in energy consumption not playing a key role and guiding role in the production process. Most enterprises still use old-fashioned instruments without reserved data communication interfaces, and the instruments cannot form network connections. The collection of energy consumption and other information mainly relies on traditional manual meter reading for data recording. The work intensity is high, and manual meter reading is prone to errors, resulting in inaccurate data. Data cannot be stored in a structured manner and cannot be shared within the enterprise through an information system.

[0003] Some smart power meters have also appeared in the prior art to realize the collection and remote transmission of power data, but most of these smart power meters have single functions and limited communication functions. For example, patent CN 115166353 A discloses a smart power meter for realizing remote data collection and control. The circuit board of the smart power meter is provided with a main control chip module, an electric quantity data collection module, a special metering module, a communication module, a data storage module and an input and output control module; the communication module communicates with the host computer by configuring the RS485 communication interface and the Ethernet interface using Mobus-RTU, DL / T645-2007 communication protocol and internal protocol; multiple smart power meters and the regional management host computer realize data communication through the RS-485 interface, and the smart power meters and the regional management host computer are connected to the remote Internet of Things platform through the smart gateway. The smart power meter can realize remote telesignaling, telemetry and remote control in one, including targeted power consumption adjustment and comprehensive intelligent monitoring. However, the smart power meter adopts a single control chip and a single network interface design, with simple functions and limited network interfaces, and cannot realize simultaneous reading of dual network segments. Summary of the invention

[0004] The utility model aims to provide a multifunctional electric power meter supporting dual network segments. The electric power meter is rich in functions, can collect and process a variety of electric power parameters, and can communicate simultaneously in two different network segments.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a multifunctional electric power meter supporting dual network segments, including a shell, a main controller board, a coprocessor mainboard, a touch screen and a key module, the main controller board and the coprocessor mainboard are arranged in the shell, and the touch screen and the key module are embedded in the shell; the main controller board is provided with a main controller, a collection unit and a liquid crystal driver, the collection unit is a three-phase electric energy dedicated metering chip, the collection unit collects current and voltage signals through a current transformer and a voltage transformer respectively, the main controller uses internal FLASH to construct an EEPROM for data storage, the main controller controls the touch screen display through a liquid crystal driver, the main controller is connected to the key module, and the main controller communicates with the host computer through an RS485 transceiver; the coprocessor mainboard is provided with a coprocessor and two super network ports, and the coprocessor realizes the dual-segment Ethernet connection function through the two super network ports; the main controller and the coprocessor communicate using a high-speed serial bus.

[0006] Furthermore, the main controller adopts the M261SIAAE chip based on the Arm Cortex-M23 core. The main controller configures parameters of the three-phase electric energy dedicated metering chip through the SPI bus, and reads the sampled data in its register for processing.

[0007] Furthermore, the acquisition unit adopts a high-precision three-phase electric energy dedicated metering chip ATT7022.

[0008] Furthermore, the external current and voltage pass through the current transformer and the voltage transformer respectively, and are converted into small voltage signals through signal conditioning. These small voltage signals are filtered and sent to the three-phase electric energy dedicated metering chip for sampling.

[0009] Furthermore, the liquid crystal driver uses a liquid crystal driver chip HT1621, and the main controller accesses two liquid crystal driver chips HT1621 respectively through a chip selection function to achieve sub-area display of the touch screen.

[0010] Furthermore, the button module includes current, voltage, power, maximum demand, harmonics, and electric energy buttons. The main controller is connected to each button through six I / O ports, and the controller scans the six I / O ports respectively to realize the six button functions of current, voltage, power, maximum demand, harmonics, and electric energy.

[0011] Furthermore, the RS485 transceiver adopts the isolated communication chip NSI83085, and the main controller accesses the isolated communication chip NSI83085 through the UART serial port, converts it into a standard RS485 serial interface to connect to the PC host computer for automatic system calibration and program upgrade.

[0012] Furthermore, the coprocessor adopts a NANO103ZD3AE chip based on the Arm Cortex-M0 core.

[0013] Furthermore, the super network port adopts a USR-K7 super network port based on the NXP Cortex-M7 core, and the coprocessor accesses two USR-K7 super network ports based on the NXP Cortex-M7 core respectively through two separate UART serial buses.

[0014] Furthermore, the co-processor is responsible for both the input and output of the instrument switch quantity.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a multifunctional electric meter supporting dual network segments. The electric meter adopts a dual control chip design of a main controller and a collaborative controller. Through the collaborative work of the dual control chips, rich functions can be realized, and various power parameters can be collected and processed to obtain energy consumption data of corresponding workstation machines; at the same time, two Ethernet super network ports are adopted to support dual network segment communication functions, so that data can be transmitted to the main control room hosts in two different network segments through different Ethernet super network ports, meeting the data collection and sharing needs of the energy management and control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a block diagram of the implementation principle of the electric power meter of the embodiment of the utility model;

[0017] Figure 2 It is a circuit diagram of the main controller board in the embodiment of the utility model;

[0018] Figure 3 is a circuit diagram of a coprocessor mainboard in an embodiment of the utility model;

[0019] Figure 4 It is a circuit diagram of a current transformer and a voltage transformer in an embodiment of the utility model. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] like Figure 1-4 As shown, this embodiment provides a multifunctional electric power meter supporting dual network segments, including a shell, a main controller board, a coprocessor mainboard, a touch screen and a key module, wherein the main controller board and the coprocessor mainboard are arranged in the shell, and the touch screen and the key module are embedded in the shell; the main controller board is provided with a main controller, a collection unit and a liquid crystal driver, the collection unit is a three-phase electric energy dedicated metering chip, the collection unit collects current and voltage signals through a current transformer and a voltage transformer respectively, the main controller uses internal FLASH to construct an EEPROM for data storage, the main controller controls the touch screen display through a liquid crystal driver, the main controller is connected to the key module, and the main controller communicates with the host computer through an RS485 transceiver; the coprocessor mainboard is provided with a coprocessor and two super network ports, and the coprocessor realizes a dual-segment Ethernet connection function through two super network ports; the main controller and the coprocessor communicate using a UART high-speed serial bus.

[0024] In this embodiment, the main controller adopts the M261SIAAE chip based on the Arm Cortex-M23 core. The main controller M261SIAAE is a new generation of 32-bit low-power microcontroller products, based on the Arm Cortex-M23 core, supporting the Armv8-M instruction set architecture; its operating frequency reaches 64MHz, embedded dual-block Flash that supports wireless firmware update technology, can operate at 1.8~3.6V operating voltage, supports -40~105℃ temperature range, low power consumption, wide operating voltage and wide temperature range, etc., which are very suitable for industrial occasions.

[0025] The main controller M261SIAAE configures the parameters of the three-phase power metering chip through the SPI bus, and reads the sampled data in its register for processing. After the calibration parameters in the EEPROM built by the MCU's internal FLASH are corrected, the sampling values ​​of electrical parameters such as current, voltage, power, and power are obtained, and then the interference signal is filtered out to obtain accurate sampling values.

[0026] The acquisition unit uses Juquan Company's high-precision three-phase power dedicated metering chip ATT7022 to collect current and voltage signals isolated by the transformer. The current and voltage transformers isolate the input signals, improving the signal's anti-interference ability. The transformers are made of Permalloy material, have a high saturation magnetic density, and have low waveform distortion, which improves the product's measurement accuracy. The external current and voltage pass through the current transformer and voltage transformer respectively, and are converted into small voltage signals through signal conditioning. These small voltage signals are filtered and sent to the three-phase power dedicated metering chip ATT7022 for sampling.

[0027] The LCD driver uses HOLTEK's multifunctional LCD driver HT1621 to control the large-screen LCD display. The main controller M261SIAAE accesses two LCD driver chips HT1621 through the chip selection function to realize the large-screen LCD sub-area display of the touch screen. The large-screen touch screen displays intuitive and rich content, including numerical displays of current, voltage, power, power factor, electric energy, etc., as well as switch input, alarm, maximum value, minimum value, average value and unit.

[0028] The button module includes current, voltage, power, maximum demand, harmonics, and electric energy buttons. The main controller M261SIAAE connects each button through six I / O ports, and scans the six I / O ports respectively to realize the six button functions of current, voltage, power, maximum demand, harmonics, and electric energy.

[0029] The RS485 transceiver adopts the isolated communication chip NSI83085 of Nanochip Corporation. The main controller M261SIAAE accesses the isolated communication chip NSI83085 through the UART serial port, converts it into a standard RS485 serial interface to connect to the PC host computer for automatic system calibration and program upgrade.

[0030] In this embodiment, the coprocessor adopts a NANO103ZD3AE chip based on the Arm Cortex-M0 core.

[0031] The super network port adopts the USR-K7 super network port based on the NXP Cortex-M7 core.

[0032] The coprocessor NANO103ZD3AE accesses two USR-K7 super network ports based on the NXP Cortex-M7 core through two separate UART serial buses. It integrates the TCP / IP protocol stack to realize data transmission between the instrument serial port and the network port, and realizes the dual-segment Ethernet connection function of the instrument. The dual-segment design of this device further meets customer needs and improves user stickiness.

[0033] The co-processor is responsible for both the input and output of the instrument switch quantity.

[0034] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A multifunctional power meter supporting dual network segments, characterized in that: It includes a shell, a main controller board, a co-processor mainboard, a touch screen and a key module, wherein the main controller board and the co-processor mainboard are arranged in the shell, and the touch screen and the key module are embedded in the shell; the main controller board is provided with a main controller, a collection unit and a liquid crystal driver, the collection unit is a three-phase electric energy dedicated metering chip, the collection unit collects current and voltage signals through a current transformer and a voltage transformer respectively, the main controller uses internal FLASH to construct an EEPROM for data storage, the main controller controls the touch screen display through a liquid crystal driver, the main controller is connected to the key module, and the main controller communicates with the host computer through an RS485 transceiver; the co-processor mainboard is provided with a co-processor and two super network ports, and the co-processor realizes a dual-segment Ethernet connection function through the two super network ports; a high-speed serial bus is used for communication between the main controller and the co-processor.

2. A multifunctional electric power meter supporting dual network segments according to claim 1, characterized in that: The main controller adopts the M261SIAAE chip based on the Arm Cortex-M23 core. The main controller configures the parameters of the three-phase electric energy dedicated metering chip through the SPI bus and reads the sampled data in its register for processing.

3. A multifunctional electric power meter supporting dual network segments according to claim 1, characterized in that: The acquisition unit adopts a high-precision three-phase electric energy dedicated metering chip ATT7022.

4. The multifunctional electric power meter supporting dual network segments according to claim 1, characterized in that: The external current and voltage pass through the current transformer and voltage transformer respectively, and are converted into small voltage signals through signal conditioning. These small voltage signals are filtered and sent to the three-phase electric energy dedicated metering chip for sampling.

5. The multifunctional electric power meter supporting dual network segments according to claim 1, characterized in that: The liquid crystal driver adopts the liquid crystal driver chip HT1621, and the main controller accesses two liquid crystal driver chips HT1621 respectively through the chip selection function to realize the touch screen display in different areas.

6. The multifunctional electric power meter supporting dual network segments according to claim 1, characterized in that: The button module includes current, voltage, power, maximum demand, harmonics, and electric energy buttons. The main controller is connected to each button through six I / O ports. The controller scans the six I / O ports respectively to realize the six button functions of current, voltage, power, maximum demand, harmonics, and electric energy.

7. The multifunctional electric power meter supporting dual network segments according to claim 1, characterized in that: The RS485 transceiver adopts the isolated communication chip NSI83085. The main controller accesses the isolated communication chip NSI83085 through the UART serial port, converts it into a standard RS485 serial interface to connect to the PC host computer for automatic system calibration and program upgrade.

8. The multifunctional electric power meter supporting dual network segments according to claim 1, characterized in that: The coprocessor adopts the NANO103ZD3AE chip based on the Arm Cortex-M0 core.

9. The multifunctional electric power meter supporting dual network segments according to claim 1, characterized in that: The super network port adopts the USR-K7 super network port based on the NXP Cortex-M7 core, and the coprocessor accesses two USR-K7 super network ports based on the NXP Cortex-M7 core respectively through two separate UART serial buses.

10. The multifunctional electric power meter supporting dual network segments according to claim 1, characterized in that: The co-processor is responsible for both the input and output of the instrument switch quantity.

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