Multi-communication high-speed electric energy meter

Abstract

The utility model provides a kind of multi-communication high-speed electric energy meter, it solves the problem such as insufficient heterogeneous network compatibility, it includes MCU module IC15, and MCU module IC15 is connected with metering module, power module, display module, communication module, storage module and peripheral module, MCU module IC15 uses STM32H523 model, communication module has LoRaWAN&wM-BUS communication module, RS485 communication module and infrared communication module.The utility model has the advantages of good heterogeneous network compatibility, high communication security.

Description

Technical Field

[0001] This utility model belongs to the field of high-speed energy meter technology, specifically relating to a high-speed energy meter with multiple communication capabilities. Background Technology

[0002] In the current digital transformation of the power system, with the continuous improvement of the digitalization level of critical facility control networks and the emergence of technologies and equipment such as intelligent primary equipment and wireless communication, the energy system, especially the power sector, has suffered a significant increase in cyberattacks, becoming a major threat to power grid security. Existing communication data security protection systems need to focus on addressing three core threats: data transmission integrity protection; equipment authentication mechanisms; and heterogeneous network compatibility design.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a highly integrated energy meter based on a multi-mode communication metering SOC chip [202510119270.2], which includes a chip, as well as an externally connected radio frequency antenna, HPLC line drive module, Ethernet modulation and demodulation module, and signal acquisition module. The communication signal on the power line reaches the HPLCAFE through a coupling circuit and filter, and is then demodulated and processed by the MCU; the power signal reaches the power metering ADC after signal acquisition, is quantized and sent to the DSP, and the active and reactive power are calculated and stored in the SRAM. The meter's operating information, fault information, and energy information are encrypted by the encryption / decryption and chip ID storage module and then transmitted under the control of the MCU via Bluetooth, or after being modulated by HRFMAC&PHY and transmitted through a high-speed radio frequency transceiver, or after being modulated by the HPLCAFE, amplified by the drive module, and coupled to the power line by the coupling circuit.

[0004] The above solution has solved the problem of communication security of electricity meters to a certain extent, but it still has many shortcomings, such as insufficient compatibility with heterogeneous networks. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a high-speed energy meter with a reasonable design and good compatibility with heterogeneous networks and multiple communications.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-speed energy meter with multiple communications, including an MCU module IC15. The MCU module IC15 is connected to a metering module, a power supply module, a display module, a communication module, a storage module, and a peripheral module. The MCU module IC15 adopts the STM32H523 model. The communication module has a LoRaWAN & wM-BUS communication module, an RS485 communication module, and an infrared communication module.

[0007] In the aforementioned high-speed energy meter with multiple communications, the MCU module IC15 is equipped with a crystal oscillator XT3, the MCU module IC15 is connected to switches S2 and S3, the MCU module IC15 is equipped with a light-emitting diode LED3, and the MCU module IC15 is connected to interfaces J3, J5, and J6.

[0008] In the aforementioned high-speed energy meter with multiple communications, the power module includes a constant voltage switching power supply chip IC1. The constant voltage switching power supply chip IC1 is connected to three 3.3V power supply circuits, one RS4585 power supply circuit, and two 12V power supply circuits. The 3.3V power supply circuits have linear regulators IC2, IC3, and IC4, and the RS4585 power supply circuits have a switching regulator IC14.

[0009] In the aforementioned high-speed energy meter with multiple communications, the LoRaWAN&wM-BUS communication module includes a LoRaWAN&wM-BUS communication chip U4, which is connected to an interface J4.

[0010] In the aforementioned high-speed energy meter with multiple communications, the RS485 communication module includes a multi-channel operational amplifier IC17, which is connected to an RS485 communication transceiver IC16. The RS485 communication module has optocouplers U2 and U3, as well as interfaces JP1 and JP2.

[0011] In the aforementioned high-speed energy meter with multiple communications, the infrared communication module includes a light-emitting diode (LED1) and an infrared receiver (IR1), with the infrared receiver (IR1) connected to a transistor (Q1).

[0012] In the aforementioned high-speed energy meter with multiple communications, the metering module includes metering chips IC7, IC10, and IC12, as well as operational amplifiers IC8, IC9, and IC11. The metering module is equipped with interfaces FA, FB, and FC. The metering module also includes metering chip IC6, which is equipped with crystal oscillator XT1, multi-channel operational amplifier IC5, and interface J1.

[0013] In the aforementioned high-speed energy meter with multiple communications, the display module includes an LCD driver module IC13, which is connected to an LCD display screen LCD1.

[0014] In the aforementioned high-speed energy meter with multiple communications, the storage module includes a FLASH memory chip IC13 and an EEPROM memory chip IC16.

[0015] In the aforementioned high-speed energy meter with multiple communications, the peripheral modules include a Hall sensor IC17 and an optocoupler U5.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: it adopts an STM32H523 MCU module with multiple communication modules, and reserves an RS485 interface to ensure compatibility with heterogeneous networks; it has a built-in LoRaWAN & wM-BUS communication module, integrating the LoRaWAN™ protocol stack and the wM-Bus protocol stack without additional wiring, which is convenient for meter reading; the firmware integrates TLS1.2 to effectively prevent data tampering and ensure the security of data transmission and network connection. Attached Figure Description

[0017] Figure 1 This is a circuit diagram of the MCU module of this utility model;

[0018] Figure 2 This is a circuit diagram of the power module of this utility model;

[0019] Figure 3 This is another circuit diagram of the power supply module of this utility model;

[0020] Figure 4 This is a circuit diagram of the LoRaWAN & wM-BUS communication module of this utility model;

[0021] Figure 5 This is a circuit diagram of the RS485 communication module of this utility model;

[0022] Figure 6 This is a circuit diagram of the infrared communication module of this utility model;

[0023] Figure 7 This is a circuit diagram of the metering module of this utility model;

[0024] Figure 8 This is another circuit diagram of the metering module of this utility model;

[0025] Figure 9 This is a circuit diagram of the display module of this utility model;

[0026] Figure 10 This is a circuit diagram of the storage module of this utility model;

[0027] Figure 11 This is a circuit diagram of the peripheral module of this utility model. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1-11As shown, a high-speed energy meter with multiple communications supports active power level 1 and reactive power level 2 accuracy metering. It includes an MCU module IC15, which connects to a metering module, a power supply module, a display module, a communication module, a storage module, and peripheral modules. The MCU module IC15 uses the STM32H523 model. The communication modules include LoRaWAN & WM-BUS communication modules, RS485 communication modules, and infrared communication modules. The MCU module IC15 used in this high-speed energy meter is based on the Arm Cortex-M33 core and provides multiple security functions, including TrustZone mechanism, AES and Public Key Accelerator (PKA) side-channel hardware resistance, TRNG compliant with FIPS SP800-90B, Hardware Unique Key (HUK) storage, Secure Firmware Installation (SFI) with protected software IP initial programming, and debug access control certified by ECDSA-P256.

[0030] Specifically, the MCU module IC15 is equipped with a crystal oscillator XT3, the MCU module IC15 is connected to switches S2 and S3, the MCU module IC15 is equipped with a light-emitting diode LED3, and the MCU module IC15 is connected to interfaces J3, J5, and J6.

[0031] Specifically, the power module includes a constant voltage switching power supply chip IC1, which features a modular design that is small in size, high in output power, low in output ripple, and includes load short-circuit protection. The constant voltage switching power supply chip IC1 connects to three 3.3V power supply circuits, one RS4585 power supply circuit, and two 12V power supply circuits. The 3.3V power supply circuits include linear regulators IC2, IC3, and IC4, while the RS4585 power supply circuits include a switching regulator IC14. The 12V power supply circuit powers the module, and the 3.3V power supply circuit powers the MCU module IC15 and other peripheral modules.

[0032] Furthermore, the LoRaWAN & wM-BUS communication module includes the LoRaWAN & wM-BUS communication chip U4, which integrates the LoRaWAN™ protocol stack and the wM-Bus protocol stack. The LoRaWAN & wM-BUS communication chip U4 is connected to interface J4. The LoRaWAN & wM-BUS communication chip U4 complies with the LoRaWAN™ Specification 1.0.4 (TS001-1.0.4) Class A / C standard published by the LoRa Alliance and the Regional Parameters (RP002-1.0.3) standard established by LoRaWAN. The wM-Bus protocol stack complies with the EN13757-4:2019 standard published by the European Committee for Standardization (CEN).

[0033] Furthermore, the RS485 communication module adopts a high-speed isolation scheme with a baud rate of up to 921600 bits / s. Specifically, it includes a multi-channel operational amplifier IC17, which is connected to an RS485 communication transceiver IC16. The RS485 communication module has optocouplers U2 and U3, as well as interfaces JP1 and JP2.

[0034] In addition, the infrared communication module adopts a single-phase communication method, including an LED1 and an infrared receiver IR1, with a transistor Q1 connected to the IR1. The LED1 periodically transmits metering data, and the IR1 is used for page turning.

[0035] Meanwhile, the metering module includes metering chips IC7, IC10, and IC12, as well as operational amplifiers IC8, IC9, and IC11. Metering chips IC7, IC10, and IC12 utilize the V9240 chip to support full-wave and fundamental-wave energy metering in multiple modes and to monitor various power grid events. Waveform data can be transmitted via DMA using the SPI protocol or stored locally through waveform buffering. The metering module is equipped with interfaces FA, FB, and FC; it includes metering chip IC6, which is equipped with a crystal oscillator XT1, a multi-channel operational amplifier IC5, and interface J1. The metering module, using hardware-isolated communication technology and software PWM technology, along with four single-phase metering chips, implements four-channel manganese-copper shunt sampling, replacing the use of a current transformer (CT) and offering better resistance to DC magnetic fields.

[0036] As can be seen, the display module includes an LCD driver module IC13, which is connected to an LCD display LCD1. The LCD driver module IC13 is driven by a BU9795, and the LCD display LCD1 is a segment LCD display designed by 8COM×21SEG. With the help of key input, it can display various real-time metering parameters and power consumption data of the electricity meter.

[0037] Clearly, the storage module includes a 4MB FLASH storage chip IC13 and a 512KB EEPROM storage chip IC16, meeting the large data storage requirements of smart meters.

[0038] Preferably, the peripheral module includes a Hall sensor IC17 and an optocoupler U5, which can realize the detection of external rate input signals and magnetic field detection.

[0039] In summary, the principle of this embodiment is as follows: using the STM32H523 MCU module IC15 as the core controller, it coordinates and connects the metering module, power supply module, communication module, display module, storage module and peripheral module to achieve high-precision power metering, multi-protocol data communication and system-level security protection.

[0040] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0041] Although this document frequently uses terms such as metering module, power supply module, display module, communication module, storage module, and peripheral module, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A high-speed energy meter with multiple communication capabilities, comprising an MCU module IC15, wherein the MCU module IC15 is connected to a metering module, a power supply module, a display module, a communication module, a storage module, and a peripheral module, characterized in that, The MCU module IC15 is an STM32H523, and the communication module has a LoRaWAN & WM-BUS communication module, an RS485 communication module, and an infrared communication module.

2. The high-speed energy meter with multiple communications according to claim 1, characterized in that, The MCU module IC15 is equipped with a crystal oscillator XT3, the MCU module IC15 is connected to switches S2 and S3, the MCU module IC15 is equipped with a light-emitting diode LED3, and the MCU module IC15 is connected to interfaces J3, J5, and J6.

3. A high-speed energy meter with multiple communications according to claim 1, characterized in that, The power module includes a constant voltage switching power supply chip IC1, which is connected to three 3.3V power supply circuits, one RS4585 power supply circuit, and two 12V power supply circuits. The 3.3V power supply circuits have linear regulators IC2, IC3, and IC4, and the RS4585 power supply circuits have a switching regulator IC14.

4. A high-speed energy meter with multiple communications according to claim 1, characterized in that, The LoRaWAN & wM-BUS communication module includes a LoRaWAN & wM-BUS communication chip U4, which is connected to an interface J4.

5. A high-speed energy meter with multiple communications according to claim 1, characterized in that, The RS485 communication module includes a multi-channel operational amplifier IC17, which is connected to an RS485 communication transceiver IC16. The RS485 communication module has optocouplers U2 and U3 and interfaces JP1 and JP2.

6. A high-speed energy meter with multiple communications according to claim 1, characterized in that, The infrared communication module includes a light-emitting diode (LED1) and an infrared receiver (IR1), wherein the infrared receiver (IR1) is connected to a transistor (Q1).

7. A high-speed energy meter with multiple communications according to claim 1, characterized in that, The metering module includes metering chips IC7, IC10, and IC12, as well as operational amplifiers IC8, IC9, and IC11. The metering module is equipped with interfaces FA, FB, and FC. The metering module also includes metering chip IC6, which is equipped with crystal oscillator XT1, multi-channel operational amplifier IC5, and interface J1.

8. A high-speed energy meter with multiple communications according to claim 1, characterized in that, The display module includes an LCD driver module IC13, which is connected to an LCD display screen LCD1.

9. A high-speed energy meter with multiple communications according to claim 1, characterized in that, The storage module includes a FLASH memory chip IC13 and an EEPROM memory chip IC16.

10. A high-speed energy meter with multiple communications according to claim 1, characterized in that, The peripheral module includes a Hall sensor IC17 and an optocoupler U5.

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