Three-phase four-section guide rail type electric energy meter based on multiple rate modes

Abstract

The utility model provides a three-phase four-section guide rail type electric energy meter based on multiple rate modes, which solves the problems of single wiring mode and the like of the electric energy meter, and comprises a master control metering MCU (Microprogrammed Control Unit), the master control metering MCU is connected with a battery module and a pulse output module, and the master control metering MCU is connected with an LCD (Liquid Crystal Display) display module, a key control module, a communication module and a data storage module. The main control metering MCU is connected with a metering module and a power supply module, the metering module is connected with a power supply module through a sampling module, and the power supply module is connected with the metering module through the power supply module. The utility model has the advantages of various wiring modes, stable operation and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of charging electric meters, and specifically relates to a three-phase four-section guide rail type electric energy meter based on multiple rate modes. Background Art

[0002] As a new type of electric meter, the three-phase rail-type electric meter has the advantages of high precision, high stability, and strong anti-interference ability. It has gradually become one of the important applications in the power system and is widely used in industrial production, power system monitoring, energy management, smart grids, and household electric meters. However, in actual use, the existing three-phase rail-type electric meter has a small measurement range and inaccurate measurement when dealing with small current and light load conditions. In addition, the existing electric energy meter has a relatively single function and cannot adjust the wiring mode to adapt to different current sizes and different wiring scenarios.

[0003] In order to solve the shortcomings of the existing technology, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a wide-range three-phase rail-type electric energy meter [201320319959.2], which includes a SoC system integrated chip, and the SoC system integrated chip is electrically connected to a communication module, a data storage module, a key module, a display module, a pulse output module, a signal acquisition module, and a power module, wherein the power module supplies power to the SoC system integrated chip, the communication module, and the signal acquisition module.

[0004] The above solution solves the problem of small measurement range of existing electricity meters to a certain extent, but the solution still has many shortcomings, such as the inability to adapt to different wiring scenarios. Summary of the invention

[0005] The purpose of the utility model is to provide a three-phase four-section rail-type electric energy meter based on multiple rate modes with reasonable design and high wiring flexibility in view of the above problems.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a three-phase four-section guide-type electric energy meter based on multiple rate modes, including a main control metering MCU, the main control metering MCU is connected to a battery module and a pulse output module, the main control metering MCU is connected to an LCD display module, a button control module, a communication module and a data storage module, the main control metering MCU is connected to a metering module and a power supply module, the metering module is connected to the power supply module through a sampling module, and the power supply module is connected to the metering module through the power supply module.

[0007] In the above-mentioned three-phase four-section rail-type electric energy meter based on multiple rate modes, the power module includes a rectifier circuit and a voltage stabilizing circuit; the power circuit is equipped with a voltage stabilizing chip IC3, and the voltage stabilizing chip IC3 is connected to an optocoupler U1.

[0008] In the above-mentioned three-phase four-section rail-type electric energy meter based on multiple rate modes, the sampling module includes a mutual inductance current and voltage sampling module and a direct current and voltage sampling module.

[0009] In the above-mentioned three-phase four-section rail-type electric energy meter based on multiple rate modes, the mutual inductance current and voltage sampling module includes a sampling circuit and a voltage stabilizing circuit; the mutual inductance current and voltage sampling module is equipped with a metering unit IC8.

[0010] In the above-mentioned three-phase four-section rail-type electric energy meter based on multiple rate modes, the direct current and voltage sampling module includes a sampling circuit and a voltage stabilizing circuit, and the direct current and voltage sampling module is equipped with metering units IC19, IC20, and IC22; the direct current and voltage sampling module is equipped with a metering unit IC18, and the metering unit IC18 is connected to the interface J10.

[0011] In the above-mentioned three-phase four-cell rail-type electric energy meter based on multiple rate modes, the main control metering MCU includes a metering unit IC9 of the HT6015 model, and the metering unit IC9 is connected to an interface J14; the data storage module includes a storage chip IC7.

[0012] In the above-mentioned three-phase four-section guide-type electric energy meter based on multiple rate modes, the LCD display module includes a display chip LCD1.

[0013] In the above-mentioned three-phase four-cell guide-rail type electric energy meter based on multiple rate modes, the button control module includes a touch chip IC10.

[0014] In the above-mentioned three-phase four-section guide-type electric energy meter based on multiple rate modes, the communication module includes an IR communication unit, an MBus communication unit and an RS485 communication unit; the MBus communication unit includes a communication chip IC4, and the RS485 communication unit includes communication chips IC1 and IC2.

[0015] In the above-mentioned three-phase four-section rail-type electric energy meter based on multiple rate modes, the pulse output module includes a pulse output interface J7, the pulse output module is equipped with a detection interface J11, and the battery module includes a voltage stabilization interface J15.

[0016] Compared with the existing technology, the advantages of the utility model are: the sampling module can select different sampling methods, collect information to the main control metering MCU, and switch the wiring method to meet different metering modes; the electric energy meter supports multiple communication methods to ensure stable information transmission and ensure billing accuracy; the LCD display module and the button control module can meet the electric energy meter parameter query and setting requirements, and improve the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the structural principle diagram of the utility model;

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

[0019] Figure 3 It is a circuit diagram of the mutual inductance current and voltage sampling module of the utility model;

[0020] Figure 4 It is a circuit diagram of the direct current and voltage sampling module of the utility model;

[0021] Figure 5 It is a circuit diagram of the main control metering MCU and the data storage module of the utility model;

[0022] Figure 6 It is a circuit diagram of the LCD display module and the key control module of the utility model;

[0023] Figure 7 It is a circuit diagram of the communication module of the utility model;

[0024] Figure 8 It is a circuit diagram of the battery module and the pulse output module of the utility model;

[0025] In the figure, the main control metering MCU1, battery module 2, pulse output module 3, LCD display module 4, key control module 5, communication module 6, data storage module 7, metering module 8, sampling module 81, power module 82, and power supply module 9. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1-8 As shown, a three-phase four-section rail-type electric energy meter based on multiple rate modes includes a main control metering MCU1, the main control metering MCU1 is connected to a battery module 2 and a pulse output module 3, the main control metering MCU1 is connected to an LCD display module 4, a key control module 5, a communication module 6 and a data storage module 7, the main control metering MCU1 is connected to a metering module 8 and a power supply module 9, the metering module 8 is connected to a power supply module 82 through a sampling module 81, and the power supply module 82 is connected to the metering module 8 through the power supply module 9. Different metering modules 8 and sampling modules 81 are selected according to actual needs, and different communication modules 6 are matched to realize the switching of electric energy meter types.

[0028] Specifically, the power module 82 includes a rectifier circuit and a voltage stabilizing circuit; the power module 82 is equipped with a voltage stabilizing chip IC3, and the voltage stabilizing chip IC3 is connected to an optocoupler U1.

[0029] In depth, the sampling module 81 collects voltage and current from the power module 82, including a mutual inductance current and voltage sampling module and a direct current and voltage sampling module. The mutual inductance current and voltage sampling module and the direct current and voltage sampling module are respectively equipped with independent metering modules 8,

[0030] Furthermore, the mutual inductance current and voltage sampling module includes a sampling circuit and a voltage stabilization circuit; the mutual inductance current and voltage sampling module is equipped with a metering unit IC8.

[0031] Furthermore, the direct current and voltage sampling module includes a sampling circuit and a voltage stabilizing circuit; the direct current and voltage sampling module is equipped with metering units IC19, IC20, and IC22; the direct current and voltage sampling module is equipped with a metering unit IC18, and the metering unit IC18 is connected to the interface J10.

[0032] In addition, the main control metering MCU1 includes a metering unit IC9 of the HT6015 model, and the metering unit IC9 is connected to an interface J14; the data storage module 7 includes a storage chip IC7. The main control metering MCU1 is also equipped with a corresponding reset unit and a clock module. The main control metering MCU1 performs rate calculation. The key control module 5 supports multiple rate metering, including time rate mode and external input detection rate mode. The time rate mode can be used for traditional peak and valley periods or holiday mode. The external input detection rate mode can be used for special billing such as generator power generation.

[0033] Meanwhile, the LCD display module 4 includes a display chip LCD1. The LCD display module 4 also has a backlight, an active indicator light, and a reactive indicator light. The display chip LCD1 is specifically selected as the H86771 model.

[0034] It can be seen that the key control module 5 includes a touch chip IC10, which is connected to interfaces J12 and J13. The key control module 5 cooperates with the LCD display module 4 to realize touch sensing and improve the convenience of operation. The LCD display module 4 displays the content including the power, instantaneous parameters and meter configuration information. When the electric energy meter enters the setting through the LCD display module 4 and the key control module 5, a 4-digit password needs to be entered to ensure security.

[0035] Obviously, the communication module 6 includes an IR communication unit, an MBus communication unit and an RS485 communication unit; the MBus communication unit includes a communication chip IC4, and the RS485 communication unit includes communication chips IC1 and IC2. The communication module 6 is also compatible with infrared communication functions, so as to read and set the meter data and parameters. The communication parameters of the communication module 6, such as baud rate, check bit and stop bit, can be set.

[0036] Preferably, the pulse output module 3 includes a pulse output interface J7, the pulse output module 3 is equipped with a detection interface J11, and the battery module 2 includes a voltage stabilization interface J15. By selecting different sampling modules 81, the electric energy meter can be divided into a mutual inductance type with RS485 and battery version, a mutual inductance type with M-Bus and battery version, a mutual inductance type with pulse output version, a direct type with RS485 and battery version, a direct type with M-Bus and battery version, and a direct type with pulse output version. Among them, the direct type supports a maximum current of 100A, and the mutual inductance type has a maximum current of 10A. The pulse terminal output type active and reactive can be switched and the constant can be set.

[0037] To sum up, the principle of this embodiment is that the metering module 8 and the sampling module 81 select a mutual inductance current and voltage sampling module or a direct current and voltage sampling module according to actual needs, and are combined with the battery module 2, the pulse output module 3 and the communication module 6 to form different electric energy meters to meet various wiring requirements such as three-phase four-wire and three-phase three-wire.

[0038] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0039] Although this article uses more terms such as main control metering MCU1, battery module 2, pulse output module 3, LCD display module 4, key control module 5, communication module 6, data storage module 7, metering module 8, sampling module 81, power module 82, power supply module 9, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A three-phase four-section rail-type electric energy meter based on multiple rate modes, comprising a main control metering MCU (1), wherein the main control metering MCU (1) is connected to a battery module (2) and a pulse output module (3), and the main control metering MCU (1) is connected to an LCD display module (4), a key control module (5), a communication module (6) and a data storage module (7), characterized in that: The master metering MCU (1) is connected to a metering module (8) and a power supply module (9); the metering module (8) is connected to the power supply module (82) via a sampling module (81); and the power supply module (82) is connected to the metering module (8) via the power supply module (9).

2. According to claim 1, a three-phase four-section rail-type electric energy meter based on multiple rate modes is characterized in that: The power module (82) comprises a rectifier circuit and a voltage stabilizing circuit; the power module (82) is equipped with a voltage stabilizing chip IC3, and the voltage stabilizing chip IC3 is connected to an optical coupler U1.

3. According to claim 1, a three-phase four-section rail-type electric energy meter based on multiple rate modes is characterized in that: The sampling module (81) comprises a mutual inductance current and voltage sampling module and a direct current and voltage sampling module.

4. A three-phase four-section rail-type electric energy meter based on multiple rate modes according to claim 3, characterized in that: The mutual inductance current and voltage sampling module comprises a sampling circuit and a voltage stabilizing circuit; the mutual inductance current and voltage sampling module is equipped with a metering unit IC8.

5. According to claim 3, a three-phase four-section rail-type electric energy meter based on multiple rate modes is characterized in that: The direct current and voltage sampling module includes a sampling circuit and a voltage stabilizing circuit; the direct current and voltage sampling module is equipped with metering units IC19, IC20, and IC22; the direct current and voltage sampling module is equipped with a metering unit IC18, and the metering unit IC18 is connected to an interface J10.

6. A three-phase four-section rail-type electric energy meter based on multiple rate modes according to claim 1, characterized in that: The master metering MCU (1) comprises a metering unit IC9 of the HT6015 model, and the metering unit IC9 is connected to an interface J14; the data storage module (7) comprises a storage chip IC7.

7. A three-phase four-section rail-type electric energy meter based on multiple rate modes according to claim 1, characterized in that: The LCD display module (4) comprises a display chip LCD1.

8. The three-phase four-section rail-type electric energy meter based on multiple rate modes according to claim 1 is characterized in that: The key control module (5) comprises a touch control chip IC10.

9. A three-phase four-section rail-type electric energy meter based on multiple rate modes according to claim 1, characterized in that: The communication module (6) comprises an IR communication unit, an MBus communication unit and an RS485 communication unit; the MBus communication unit comprises a communication chip IC4, and the RS485 communication unit comprises communication chips IC1 and IC2.

10. A three-phase four-section rail-type electric energy meter based on multiple rate modes according to claim 1, characterized in that: The pulse output module (3) comprises a pulse output interface J7, the pulse output module (3) is equipped with a detection interface J11, and the battery module (2) comprises a voltage stabilization interface J15.

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