Economical three-phase guide rail type electric energy meter based on diamagnetic technology

Abstract

The utility model provides an economical three-phase guide rail type electric energy meter based on diamagnetic technology, which solves the problems of power supply stability and the like of the electric energy meter, and comprises a master control MCU (Microprogrammed Control Unit), the master control MCU is connected with an LCD (Liquid Crystal Display) display module and a communication circuit, the master control MCU is connected with a sampling circuit through a metering module, and the sampling circuit, the metering module and the master control MCU share a power supply module. The device has the advantages of good power supply stability, high metering precision and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric energy meters, and particularly relates to an economical three-phase rail-mounted electric energy meter with anti-magnetic technology. Background Art

[0002] In various rental industries such as industry, housing, schools, and markets, the types and demands for electric energy meters are becoming more and more diverse, and the ability to resist magnetic fields is becoming more and more important. Enterprises are developing more and more types and models of electric energy meters, and the R & D funds and manpower invested are also increasing accordingly. An electric energy meter that can independently select parameters can effectively save time, avoid developing electric energy meters with similar functions, and meet the diverse needs of the market. However, in the actual use process, the internal power supply of existing electric energy meters often requires several independent power modules to meet the power supply needs of different circuits, which leads to a relatively complex overall control system of the electric energy meter.

[0003] In order to solve the deficiencies of the existing technology, people have carried out long-term explorations and proposed various solutions. For example, a Chinese patent document discloses a field standard electric energy meter [200910066370.4], which includes a channel module, a data acquisition module, a measurement and calculation module, an upper computer module, an auxiliary control module, a keyboard, a display, and a power module. The channel module is connected to the data acquisition module, the data acquisition module is connected to the measurement and calculation module, the measurement and calculation module is connected to the upper computer module, the auxiliary control module is respectively connected to the upper computer module, the measurement and calculation module, and the keyboard, and the power module is respectively connected to the channel module, the data acquisition module, the measurement and calculation module, the upper computer module, the auxiliary control module, and the display. It also includes a communication interface and a pulse interface. The communication interface is connected to the upper computer module, and the pulse interface is connected to the power module. The channel module includes voltage and current input terminals and three functionally identical blocks.

[0004] The above solution solves the problem of insufficient anti-magnetic performance of the electric energy meter to a certain extent, but there are still many deficiencies in this solution, such as poor stability of the circuit power supply. Summary of the Invention

[0005] The purpose of the utility model is to provide an economical three-phase rail-mounted electric energy meter with anti-magnetic technology, which is reasonably designed and has good power supply stability, aiming at the above problems.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: An economical three-phase rail-mounted electric energy meter with anti-magnetic technology includes a main control MCU. The main control MCU is connected to an LCD display module and a communication circuit. The main control MCU is connected to a sampling circuit through a metering module. The sampling circuit, the metering module, and the main control MCU share a power module.

[0007] In the above-mentioned economical three-phase rail-mounted energy meter with anti-magnetic technology, the power supply module includes an AC-DC conversion chip IC2 of model PN6532H. The AC-DC conversion chip IC2 is connected to rectifier chips D2 and D3. The AC-DC conversion chip IC2 is connected to a linear voltage regulator IC1 of model MD7651 and a linear voltage regulator IC3 of model WL2852K33-3 / TR. The power supply module is equipped with linear voltage regulators IC4, IC5, and IC7 of model SGM2203-3.3Y.

[0008] In the above-mentioned economical three-phase rail-mounted energy meter with anti-magnetic technology, the main control MCU includes an MCU module IC14 of model CH32V203K8T6. The MCU module IC14 is equipped with a connector J2 and a crystal oscillator XT1.

[0009] In the above-mentioned economical three-phase rail-mounted energy meter with anti-magnetic technology, the metering module includes single-phase AC metering chips IC15, IC16, and IC19 of model HCT5821. The single-phase AC metering chips IC15, IC16, and IC19 are connected to the metering MCU module IC14 of model CH32V203K8T6.

[0010] In the above-mentioned economical three-phase rail-mounted energy meter with anti-magnetic technology, the sampling circuit includes digital isolators IC6, IC8, and IC11 of model YTL224-DSPR.

[0011] In the above-mentioned economical three-phase rail-mounted energy meter with anti-magnetic technology, the main control MCU is equipped with a storage circuit using a storage chip IC18 of model TD24C02 and a peripheral circuit with a battery BT1. The LCD display module uses an LCD driver IC17 of model BU9792AFUV and an LCD display chip LCD1 of model M62153-H-02.

[0012] In the above-mentioned economical three-phase rail-mounted energy meter with anti-magnetic technology, the communication circuit has an infrared communication circuit using an infrared receiver IR1 of model BPD-BQBA31 and an infrared emitter LED1 of model IR204C-A-L.

[0013] In the above-mentioned economical three-phase rail-mounted energy meter with anti-magnetic technology, the communication circuit has a 485 communication circuit using a communication chip U1 of model YCH-N52005.

[0014] In the above-mentioned economical three-phase rail-mounted energy meter with anti-magnetic technology, the communication circuit has a pulse output circuit using an optocoupler U2 of model EL816S1.

[0015] In the above-mentioned economical three-phase guide-rail type watt-hour meter with anti-magnetic technology, the LCD display module is equipped with backlight LEDs 2 and 3 of model BL62153B1-01.

[0016] Compared with the existing technology, the advantages of the present utility model are as follows: the sampling circuit, the metering module, and the main control MCU share a power supply module, and the voltage stabilizing circuit of the power supply module cooperates with the AC-DC conversion circuit to meet the variable voltage power supply requirements of complex circuits; the metering module corresponds to the sampling circuit one by one, and cooperates with the main control MCU to calculate parameters such as current, voltage, power, and active pulse number in real time and calculate the corresponding electricity quantity; the LCD display module supports multiple display modes and can display various electricity quantity information according to actual needs. Description of the Drawings

[0017] Figure 1 is a circuit schematic diagram of the power supply module of the present utility model;

[0018] Figure 2 is a circuit schematic diagram of the main control MCU of the present utility model;

[0019] Figure 3 is a circuit schematic diagram of the metering module of the present utility model;

[0020] Figure 4 is a circuit schematic diagram of the LCD display module of the present utility model;

[0021] Figure 5 is a circuit schematic diagram of the communication circuit of the present utility model;

[0022] Figure 6 is a circuit schematic diagram of the backlight circuit of the present utility model. Detailed Embodiments

[0023] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0024] As Figure 1-6 shown, an economical three-phase guide-rail type watt-hour meter with anti-magnetic technology includes a main control MCU, the main control MCU is connected to an LCD display module and a communication circuit, the main control MCU is connected to a sampling circuit through a metering module, and the sampling circuit, the metering module, and the main control MCU share a power supply module. The main control MCU processes and calculates the three-way data collected by the sampling circuit through the metering module, and the main control MCU reads the power parameters in the metering module through serial communication. After further processing the data, data transmission and electricity quantity calculation are realized.

[0025] Specifically, the power supply module includes an AC-DC conversion chip IC2 of model PN6532H. The AC-DC conversion chip IC2 is connected to rectifier chips D2 and D3. The AC-DC conversion chip IC2 is also connected to a linear voltage regulator IC1 of model MD7651 and a linear voltage regulator IC3 of model WL2852K33-3 / TR. The power supply module is equipped with linear voltage regulators IC4, IC5, and IC7 of model SGM2203-3.3Y. The AC-DC conversion chip IC2, the rectifier chips D2 and D3, and the linear voltage regulators IC1 and IC3 form a corresponding AC-DC conversion circuit. The linear voltage regulators IC4, IC5, and IC7 respectively form voltage regulation circuits. The two cooperate to ensure the stable power supply of the sampling circuit, the metering module, and the main control MCU.

[0026] In-depth, the main control MCU calculates the electricity quantity. It includes an MCU module IC14 of model CH32V203K8T6 with low power consumption and high performance. The MCU module IC14 is equipped with a connector J2 and a crystal oscillator XT1. The main control MCU also supports power-down detection. The main control MCU separately measures the forward and reverse directions in terms of metering. The electricity quantity calculation includes total active electricity quantity, forward and reverse metering, and forward and reverse clearable electricity quantity. For each type of electricity meter, the metering method can be set according to actual needs, supporting only forward electricity quantity measurement, only reverse electricity quantity measurement, absolute value electricity quantity measurement, and algebraic sum electricity quantity measurement. The total electricity quantity is calculated through the forward and reverse electricity quantity and the metering method.

[0027] Furthermore, the metering module processes and calculates the three-way data collected by the sampling circuit. The main control MCU reads the electrical energy parameters in the metering module through serial communication. After further processing the data, data transmission and electricity quantity calculation can be achieved. It specifically includes single-phase AC metering chips IC15, IC16, and IC19 of model HCT5821, and the single-phase AC metering chips IC15, IC16, and IC19 and the metering MCU module IC14 of model CH32V203K8T6.

[0028] Even further, the sampling circuit includes digital isolators IC6, IC8, and IC11 of model YTL224-DSPR. The sampling circuit tracks the level change of the analog input signal. The digital isolators IC6, IC8, and IC11 are applicable to situations such as high voltage and large current, ensuring the isolation of the input signal from other parts of the circuit.

[0029] In addition, the main control MCU is equipped with a storage circuit using a storage chip IC18 of model TD24C02 and a peripheral circuit with a battery BT1. The LCD display module uses an LCD driver IC17 of model BU9792AFUV and an LCD display chip LCD1 of model M62153-H-02. The LCD display module can query the electricity quantity information and parameter information of the electricity meter by setting the display parameters.

[0030] Meanwhile, the communication circuit has multiple communication methods, including an infrared communication circuit with an infrared receiver IR1 of model BPD-BQBA31 and an infrared transmitter LED1 of model IR204C-A-L. The communication circuit also has a 485 communication circuit with a communication chip U1 of model YCH-N52005. The baud rates of the 485 communication circuit and the infrared communication circuit can be set.

[0031] Obviously, the communication circuit has a pulse output circuit with an optocoupler U2 of model EL816S1. Different types of pulse constants can be set according to actual requirements. The terminal output can be set to 100, 200, 400, 500, 800, 1000, 2000, 4000, etc., and the pulse lamp can be set to 800, 1000, 2000.

[0032] Preferably, the LCD display module is equipped with backlights LED2 and LED3 of model BL62153B1-01 for backlight display. The LCD display module and the backlights ensure the display effect of the power meter surface panel.

[0033] In summary, the principle of this embodiment is as follows: The sampling circuit collects current, the metering module processes data and the main control MCU calculates the power consumption. The power supply module supplies power to the sampling circuit, the metering module and the main control MCU synchronously. The LCD display module displays the power consumption information according to actual needs. The communication circuit in it satisfies the internal communication of the electric energy meter and realizes external communication at the same time.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to substitute, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0035] Although terms such as main control MCU, LCD display module, communication circuit, metering module, sampling circuit, power supply module, etc. are used more frequently in this article, the possibility of using other terms is not excluded. Using these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. An economical three-phase rail-type electric energy meter with antimagnetic technology, including a main control MCU, characterized in that: The main control MCU is connected to an LCD display module and a communication circuit. The main control MCU is connected to a sampling circuit through a metering module. The sampling circuit, the metering module and the main control MCU share a power supply module; the power supply module includes an AC / DC conversion chip IC2 of the PN6532H model, the AC / DC conversion chip IC2 is connected to rectifier chips D2 and D3, the AC / DC conversion chip IC2 is connected to a linear regulator IC1 of the MD7651 model and a linear regulator IC3 of the WL2852K33-3 / TR model, and the power supply module is equipped with linear regulators IC4, IC5 and IC7 of the SGM2203-3.3Y model.

2. According to the economical three-phase rail-type electric energy meter of antimagnetic technology of claim 1, it is characterized in that: The main control MCU includes a CH32V203K8T6 model MCU module IC14, and the MCU module IC14 is equipped with a connector J2 and a crystal oscillator XT1.

3. The economical three-phase rail-type electric energy meter with antimagnetic technology according to claim 1 is characterized in that: The metering module includes single-phase AC metering chips IC15, IC16, IC19 of the HCT5821 model, and the single-phase AC metering chips IC15, IC16, IC19 and the metering MCU module IC14 of the CH32V203K8T6 model.

4. The economical three-phase rail-type electric energy meter with antimagnetic technology according to claim 1 is characterized in that: The sampling circuit includes digital isolators IC6, IC8 and IC11 of the YTL224-DSPR model.

5. The economical three-phase rail-type electric energy meter with antimagnetic technology according to claim 1 is characterized in that: The main control MCU is equipped with a storage circuit using a TD24C02 model storage chip IC18 and a peripheral circuit with a battery BT1.

6. The economical three-phase rail-type electric energy meter with antimagnetic technology according to claim 1 is characterized in that: The LCD display module adopts BU9792AFUV model LCD driver IC17 and M62153-H-02 model LCD display chip LCD1.

7. The economical three-phase rail-type electric energy meter with antimagnetic technology according to claim 1 is characterized in that: The communication circuit has an infrared communication circuit using an infrared receiver IR1 of the BPD-BQBA31 model and an infrared transmitter LED1 of the IR204C-AL model.

8. The economical three-phase rail-type electric energy meter with antimagnetic technology according to claim 1 is characterized in that: The communication circuit has a 485 communication circuit using a communication chip U1 of model YCH-N52005.

9. The economical three-phase rail-type electric energy meter with antimagnetic technology according to claim 1, characterized in that: The communication circuit has a pulse output circuit using an optocoupler U2 of the EL816S1 model.

10. The economical three-phase rail-type electric energy meter with antimagnetic technology according to claim 1, characterized in that: The LCD display module is equipped with backlight LED2 and LED3 of model BL62153B1-01.

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