CN216285478U

CN216285478U - Single-phase electric energy meter circuit

Info

Publication number: CN216285478U
Application number: CN202122783574.9U
Authority: CN
Inventors: 汤珍敏; 汤晓晖; 叶佰昊
Original assignee: Zhiming Group Co ltd
Current assignee: Zhiming Group Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-04-12
Anticipated expiration: 2031-11-11

Abstract

The utility model relates to a single-phase electric energy meter circuit, which comprises a sampling module, a signal amplifying module and a control module, wherein the sampling module is used for collecting current and voltage signals which are input in an analog mode and transmitting the input analog signals to the signal amplifying module; the signal amplification module is used for amplifying the transmitted analog signal; the SOC measures the chip, is used for digitizing the analog signal after amplifying; the liquid crystal display module displays the data parameters processed by the SOC metering chip; the data storage module stores the data parameters processed by the SOC metering chip; the key module is used for checking parameters and inputting setting signals; the electric energy pulse module is used for outputting electric energy pulses; the indicating lamp module is used for reminding a user of purchasing electricity in time; the relay driving module is used for controlling the opening of the brake; the communication module is used for communicating with other external equipment; and the IC card interface is used for purchasing power according to actual requirements by a user. The utility model has the advantage of accurate small signal measurement, has the function of power failure data storage and is convenient for data storage.

Description

Single-phase electric energy meter circuit

Technical Field

The utility model relates to the technical field of electronic instruments, in particular to a single-phase electric energy meter circuit.

Background

An electric energy meter is a meter for measuring electric energy. The current transformer that current energy meter adopted for the effect of current transformation and electrical isolation, and the current transformer that current energy meter adopted exists to the imprecise defect of small-signal measurement, causes the measured data of electric energy meter to have the error, influences the user and uses, and the electric energy meter still lacks the function of power down data storage, loses electric energy data easily when the outage.

Disclosure of Invention

In view of this, the utility model aims to provide a single-phase electric energy meter circuit with accurate small-signal measurement and power-down data storage.

In order to achieve the above purpose, the present invention adopts such a single-phase electric energy meter circuit, which comprises a sampling module, a signal amplifying module, a signal processing module and a signal processing module, wherein the sampling module is used for collecting current and voltage signals which are input in an analog manner, and transmitting the input analog signals to the signal amplifying module; the signal amplification module is used for amplifying the transmitted analog signal; the SOC measures the chip, is used for digitizing the analog signal after amplifying; the liquid crystal display module displays the data parameters processed by the SOC metering chip; the data storage module stores the data parameters processed by the SOC metering chip; the key module is used for checking parameters and inputting setting signals; the electric energy pulse module is used for outputting electric energy pulses; the indicating lamp module is used for reminding a user of purchasing electricity in time; the relay driving module is used for controlling the opening of the brake; the communication module is used for communicating with other external equipment; the IC card interface is used for purchasing power according to actual requirements by a user; the power supply module is used for providing working voltage for each module; the output of sampling module connects the input of signal amplification module, the input of SOC measurement chip is connected respectively to the output of signal amplification module, the output of button module, the output of IC joint interface, the input of electric energy pulse module, the input of liquid crystal display module, the input of pilot lamp module, relay drive module are connected respectively to the output of SOC measurement chip, communication module, data storage module are connected with SOC measurement chip electricity respectively.

The utility model discloses further set up as sampling module includes current sampling circuit, voltage sampling circuit, current sampling circuit adopts high accuracy current transformer.

The utility model discloses a data storage module is EEPROM memory IC7, EEPROM memory IC7 is the data storage module that the memory chip of model MB85RC16 constitutes.

The utility model discloses set up further to the model of SOC measures the chip is V9811B.

Compared with the prior art, the utility model has the beneficial effects that: the current sampling circuit on the sampling module adopts a high-precision current transformer, the transformer is large in size, the sampling precision is higher, the current transformer before the sampling is compared, the advantage of more accurate measurement of small signals is realized, the EEPROM memory is adopted through the data storage module, the erasable times of the memory are increased, the electric energy change can be realized, the storage is once stored, the memory before the comparison is realized, and the advantage of power-down data storage is realized.

Drawings

Fig. 1 is a schematic block diagram of an embodiment of the present invention.

Fig. 2 is a schematic circuit diagram of a sampling module according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of an SOC metering chip circuit according to an embodiment of the utility model.

FIG. 4 is a circuit schematic of a data storage module according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-4, the single-phase electric energy meter circuit of the present invention includes a sampling module for collecting analog input current and voltage signals and transmitting the input analog signals to a signal amplifying module; the signal amplification module is used for amplifying the transmitted analog signal; the SOC measures the chip, is used for digitizing the analog signal after amplifying; the liquid crystal display module displays the data parameters processed by the SOC metering chip; the data storage module stores the data parameters processed by the SOC metering chip; the key module is used for checking parameters and inputting setting signals; the electric energy pulse module is used for outputting electric energy pulses; the indicating lamp module is used for reminding a user of purchasing electricity in time; the relay driving module is used for controlling the opening of the brake; the communication module is used for communicating with other external equipment; the IC card interface is used for purchasing power according to actual requirements by a user; the power supply module is used for providing working voltage for each module; the input of signal amplification module is connected to the output of sampling module, the input of SOC measurement chip is connected respectively to the output of signal amplification module, the output of button module, the output of IC joint interface, the input of electric energy pulse module, the input of liquid crystal display module, the input of pilot lamp module, relay drive module are connected respectively to the output of SOC measurement chip, communication module, data storage module are connected with SOC measurement chip electricity respectively, the model of SOC measurement chip is V9811B.

As shown in fig. 2, the sampling module includes a current sampling circuit, the current sampling circuit employs a high-precision current transformer, and is illustrated by taking one current sampling circuit in the figure as an example, the current sampling circuit includes sampling signals IA-, IA +, and a high-precision current transformer T1, resistors R13-R14, resistors R19-R20, and capacitors C4-C5, the sampling signal IA-is connected to an input terminal of the high-precision current transformer T1, an output terminal of the high-precision current transformer T1 is respectively connected to one end of a resistor R13 and one end of a resistor R19, the other end of the resistor R13 is grounded, the other end of the resistor R19 is respectively connected to one end of a capacitor C4 and a fourth pin of a metering chip IC1, the other end of the capacitor C4 is grounded, the sampling signal IA + is connected to an input terminal of the high-precision current transformer T1, and output terminals of the high-precision current transformer T1 are respectively connected to one end of a resistor R14, One end of a resistor R20, the other end of the resistor R14 is grounded, the other end of the resistor R20 is respectively connected to one end of a capacitor C5 and the fifth pin of the metering chip IC1, the other end of the capacitor C5 is grounded, the sampling module further includes a voltage sampling circuit, which is also exemplified by one of the voltage sampling circuits in the figure, the voltage sampling circuit includes a sampling signal U _ a, resistors R1 to R3, a resistor R10 and a capacitor C1, the sampling signal U _ a is connected to one end of the resistor R1, the other end of the resistor R1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to one end of the resistor R3, the other end of the resistor R3 is respectively connected to one end of the resistor R10, the thirteenth pin of the metering chip IC1 and one end of the capacitor C1, the other end of the resistor R10 and the other end of the capacitor C1 are grounded, the voltage sampling circuit further includes a rated voltage UN, the output end of the rated voltage UN is connected with one end of a magnetic bead inductor L1, and the other end of the magnetic bead inductor L1 is grounded.

As shown in fig. 3 and 4, the data storage module is an EEPROM memory IC7, the EEPROM memory IC7 is a data storage module formed by a memory chip with model number MB85RC16, the first pin, the second pin, the third pin and the fourth pin of the data storage module IC7 are all grounded, the eighth pin of the data storage module IC7 is connected to a high level, the seventh pin of the data storage module IC7 is connected to the fifty-fourth pin of the SOC metering chip IC1, the sixth pin of the data storage module IC7 is connected to the fifty-eighth pin of the SOC metering chip IC1, and the fifth pin of the data storage module IC7 is connected to the fifty-seventh pin of the SOC metering chip IC 1.

According to the embodiment, the single-phase electric energy meter circuit adopts the high-precision current transformer through the current sampling circuit on the sampling module, the transformer is large in size and higher in sampling precision, compared with the conventional current transformer, the advantage of more accurate measurement of small signals is realized, the erasable times of the memory are increased by adopting the EEPROM memory through the data storage module, the electric energy can be stored once after being changed, and the advantage of power-down data storage is realized compared with the conventional memory.

The present invention may be embodied in many other forms without departing from the spirit or essential characteristics thereof, and it should be understood that various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. A single-phase electric energy meter circuit is characterized in that: the device comprises a sampling module, a signal amplification module and a signal processing module, wherein the sampling module is used for collecting current and voltage signals which are input in an analog mode and transmitting the input analog signals to the signal amplification module;

the signal amplification module is used for amplifying the transmitted analog signal;

the SOC measures the chip, is used for digitizing the analog signal after amplifying;

the liquid crystal display module displays the data parameters processed by the SOC metering chip;

the data storage module stores the data parameters processed by the SOC metering chip;

the key module is used for checking parameters and inputting setting signals;

the electric energy pulse module is used for outputting electric energy pulses;

the indicating lamp module is used for reminding a user of purchasing electricity in time;

the relay driving module is used for controlling the opening of the brake;

the communication module is used for communicating with other external equipment;

the IC card interface is used for purchasing power according to actual requirements by a user;

the power supply module is used for providing working voltage for each module;

the output of sampling module connects the input of signal amplification module, the input of SOC measurement chip is connected respectively to the output of signal amplification module, the output of button module, the output of IC joint interface, the input of electric energy pulse module, the input of liquid crystal display module, the input of pilot lamp module, relay drive module are connected respectively to the output of SOC measurement chip, communication module, data storage module are connected with SOC measurement chip electricity respectively.

2. The single-phase electric energy meter circuit according to claim 1, characterized in that: the sampling module comprises a current sampling circuit and a voltage sampling circuit, wherein the current sampling circuit adopts a high-precision current transformer.

3. The single-phase electric energy meter circuit according to claim 1, characterized in that: the data storage module is an EEPROM memory IC7, and the EEPROM memory IC7 is a data storage module formed by memory chips with the model number MB85RC 16.

4. The single-phase electric energy meter circuit according to claim 1, characterized in that: the model of the SOC metering chip is V9811B.