CN216285447U

CN216285447U - Three-phase harmonic electric energy meter circuit

Info

Publication number: CN216285447U
Application number: CN202122779261.6U
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 three-phase harmonic electric energy meter circuit, which comprises a metering sampling module, a voltage measuring module and a harmonic generating module, wherein the metering sampling module is used for collecting current and voltage signals which are input in an analog mode, and converting the input analog signals into digital signals by a metering chip; the transmitting module is used for converting the input large-current signal into a standard signal; the key module is used for checking parameters and inputting settings; a signal clock module for tracking date and time; the main control module processes the digital signal output by the metering sampling module; the data storage module stores the data parameters processed by the main control module; the liquid crystal display module displays the data parameters processed by the main control module; the electric energy pulse module is used for outputting electric energy pulses; the switching value control module is used for switching control; and the alarm module is used for sending out circuit abnormity warning information. The utility model has the advantages of diversified display data and accurate small signal measurement, and has the function of power-down data storage, thereby being convenient for data storage.

Description

Three-phase harmonic electric energy meter circuit

Technical Field

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

Background

An electric energy meter is a meter for measuring electric energy. The existing electric energy meter is an LCD screen and used for displaying basic electric energy data, the LCD screen of the existing electric energy meter has the defect of single display data, the data such as voltage, current, power, frequency electric energy and the like cannot be effectively displayed, the current transformer also has the problem of inaccurate small signal measurement, the measured data of the electric energy meter has errors, the function of power failure data storage is also lacked, and the electric energy data are easily lost when the power failure occurs.

Disclosure of Invention

In view of the above, the present invention provides a three-phase harmonic electric energy meter circuit with diversified display data, accurate small signal measurement, and power-down data storage.

In order to achieve the purpose, the utility model adopts the three-phase harmonic electric energy meter circuit which comprises a metering sampling module, a voltage sampling module and a voltage sampling module, wherein the metering sampling module is used for collecting current and voltage signals which are input in an analog mode, and converting the input analog signals into digital signals by a metering chip; the transmitting module is used for converting the input large-current signal into a standard signal; the key module is used for checking parameters and inputting setting signals; a clock module for tracking date and time; the main control module processes the digital signal output by the metering sampling module; the data storage module stores the data parameters processed by the main control module; the liquid crystal display module displays the data parameters processed by the main control module; the electric energy pulse module is used for outputting electric energy pulses; the switching value control module is used for switching control; the alarm module is used for sending out circuit abnormity warning information; the communication module is used for communicating with other external equipment; the power supply module is used for providing working voltage for each module; the output end of the metering sampling module, the output end of the transmission module, the output end of the key module and the output end of the clock module are respectively connected with the input end of the main control module, the output end of the main control module is respectively connected with the input end of the electric energy pulse module, the input end of the liquid crystal display module and the input end of the alarm module, the communication module, the data storage module and the switching value control module are respectively and electrically connected with the main control module, and the output end of the metering sampling module is also connected with the input end of the transmission module.

The utility model discloses further set up as the liquid crystal display module includes segmented LCD1, liquid crystal driver chip IC3, segmented LCD1 is connected the drive by the liquid crystal driver chip IC3 that the model is HT1625 and shows.

The utility model discloses further set up as measurement sampling module includes sampling module, measurement chip IC1, sampling module includes current sampling circuit, voltage sampling circuit, current sampling circuit adopts high accuracy current transformer, measurement chip IC 1's model is V9203.

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 MB85RC64 constitutes.

The utility model discloses further set up as the host system that host system comprises the SOC chip that the model is STM32F103RBT 6.

The utility model discloses further set up to the input of switching value control module detects as many as 6 ways, the button module adopts 6 x 8 to dabble the button.

Compared with the prior art, the utility model has the beneficial effects that: adopt high accuracy current transformer through the current sampling circuit on the measurement sampling module, the mutual-inductor is bulky, the precision of sampling is higher, current transformer before comparing, the more accurate advantage of measurement of small signal has been realized, adopt the segmented liquid crystal screen through the liquid crystal display module, data such as LCD screen on the electric energy meter can show voltage, electric current, frequency electric energy, compare the LCD screen before, the advantage of showing data pluralism has been realized, adopt EEPROM memory through the data storage module, make the memory number of times of erasing and writing increase, can accomplish that the electric energy changes and just preserves once, compare memory before, the advantage of falling electric data storage has been 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 liquid crystal display module according to an embodiment of the utility model.

FIG. 3 is a schematic circuit diagram of a metrology sampling module according to an embodiment of the present invention.

Fig. 4 is a schematic circuit diagram of a main control module according to an embodiment of the present invention.

FIG. 5 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. 1-5, the utility model adopts a three-phase harmonic electric energy meter circuit, which comprises a metering sampling module for collecting analog input current and voltage signals, and converting the input analog signals into digital signals by a metering chip; the transmitting module is used for converting the input large-current signal into a standard signal; the key module is used for checking parameters and inputting setting signals; a clock module for tracking date and time; the main control module processes the digital signal output by the metering sampling module; the data storage module stores the data parameters processed by the main control module; the liquid crystal display module displays the data parameters processed by the main control module; the electric energy pulse module is used for outputting electric energy pulses; the switching value control module is used for switching control; the alarm module is used for sending out circuit abnormity warning information; the communication module is used for communicating with other external equipment; the power supply module is used for providing working voltage for each module; the output of measurement sampling module, the output of transmission module, the output of button module, the output of clock module connect host system's input respectively, power pulse module's input, liquid crystal display module's input, alarm module's input are connected respectively to host system's output, communication module, data storage module, switching value control module are connected with the host system electricity respectively, the input of transmission module is still connected to measurement sampling module's output, host system's model is STM32F103RBT 6.

As shown in fig. 2, the liquid crystal display module includes a segmentum liquid crystal panel LCD1 and a liquid crystal driving chip IC3, the segmentum liquid crystal panel LCD1 is connected to the liquid crystal driving chip IC3 with the model number HT1625 for driving display, a fifty-third pin of the segmentum liquid crystal panel LCD1 is connected to one end of a resistor R47, the other end of the resistor R47 is connected to an emitter of a triode Q5, a base of the triode Q5 is connected to one end of a resistor R48, the other end of the resistor R48 is connected to a thirty-ninth pin of the main control module IC2, a collector of the triode Q5 is grounded, a fifty-fourth pin of the segmentum liquid crystal panel LCD1 is connected to a high level, a first pin to a fifty-second pin of the segmentum liquid crystal panel LCD1 are connected to the liquid crystal driving module IC3, and the model number HT1625 of the liquid crystal driving module IC3 is.

As shown in fig. 3, the metering and sampling module includes a sampling module and a metering chip IC1, 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 as an example in the figure, the current sampling circuit includes sampling signals IA-, IA +, a high-precision current transformer T1, resistors R13-R14, resistors R21-R22, 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 the resistor R13 and one end of the resistor R21, the other end of the resistor R13 is grounded, the other end of the resistor R21 is respectively connected to one end of the capacitor C4 and a fourth pin of the 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, the output end of the high-precision current transformer T1 is respectively connected to one end of a resistor R14 and one end of a resistor R22, the other end of the resistor R14 is grounded, the other end of the resistor R22 is respectively connected to one end of a capacitor C5 and a fifth pin of a 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 a resistor R1, the other end of the resistor R1 is connected to one end of a resistor R2, the other end of a resistor R2 is connected to one end of a resistor R3, the other end of the resistor R3 is respectively connected to one end of a resistor R10, a thirteenth pin of a metering chip IC1 and one end of a capacitor C1, the other end of the resistor R10 and the other end of the capacitor C1 are both grounded, the voltage sampling circuit further comprises a rated voltage UN, the output end of the rated voltage UN is connected with one end of a magnetic bead inductor L1, the other end of the magnetic bead inductor L1 is grounded, and the type of the metering chip IC1 is V9203.

As shown in fig. 4 and 5, the data storage module is an EEPROM memory IC7, the EEPROM memory IC7 is a data storage module formed by a memory chip with a model number MB85RC64, a first pin, a second pin, a third pin and a fourth pin of the data storage module IC7 are all grounded, an eighth pin of the data storage module IC7 is connected to a high level, a seventh pin of the data storage module IC7 is connected to a twenty-seventh pin of the main control module IC2, a sixth pin of the data storage module IC7 is connected to a twenty-eighth pin of the main control module IC2, and a fifth pin of the data storage module IC7 is connected to a twenty-ninth pin of the main control module IC 2.

According to the embodiment, the three-phase harmonic electric energy meter circuit adopts the high-precision current transformer through the current sampling circuit on the metering sampling module, the transformer is large in size and higher in sampling precision, compared with the prior current transformer, the advantage that small signals are more accurately measured is realized, the LCD screen on the electric energy meter can display data such as voltage, current, frequency and frequency electric energy through the segmented liquid crystal display screen adopted by the liquid crystal display module, the advantage that the display data are diversified is realized compared with the prior LCD screen, the erasable times of the memory are increased through the EEPROM memory adopted by 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 prior 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 three-phase harmonic electric energy meter circuit is characterized in that: the device comprises a metering sampling module, a voltage sampling module and a voltage sampling module, wherein the metering sampling module is used for collecting current and voltage signals which are input in an analog mode and converting the input analog signals into digital signals by a metering chip;

the transmitting module is used for converting the input large-current signal into a standard signal;

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

a clock module for tracking date and time;

the main control module processes the digital signal output by the metering sampling module;

the data storage module stores the data parameters processed by the main control module;

the liquid crystal display module displays the data parameters processed by the main control module;

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

the switching value control module is used for switching control;

the alarm module is used for sending out circuit abnormity warning information;

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

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

the output end of the metering sampling module, the output end of the transmission module, the output end of the key module and the output end of the clock module are respectively connected with the input end of the main control module, the output end of the main control module is respectively connected with the input end of the electric energy pulse module, the input end of the liquid crystal display module and the input end of the alarm module, the communication module, the data storage module and the switching value control module are respectively and electrically connected with the main control module, and the output end of the metering sampling module is also connected with the input end of the transmission module.

2. The three-phase harmonic electric energy meter circuit according to claim 1, characterized in that: the liquid crystal display module comprises a segmented liquid crystal screen LCD1 and a liquid crystal driving chip IC3, wherein the segmented liquid crystal screen LCD1 is connected with the liquid crystal driving chip IC3 with the model number of HT1625 for driving display.

3. The three-phase harmonic electric energy meter circuit according to claim 1, characterized in that: measurement sampling module includes sampling module, measurement chip IC1, sampling module includes current sampling circuit, voltage sampling circuit, current sampling circuit adopts high accuracy current transformer, measurement chip IC 1's model is V9203.

4. The three-phase harmonic 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 64.

5. The three-phase harmonic electric energy meter circuit according to claim 1, characterized in that: the main control module is composed of an SOC chip with the model number of STM32F103RBT 6.

6. The three-phase harmonic electric energy meter circuit according to claim 1, characterized in that: the input detection of the switching value control module is up to 6 paths, and the key module adopts 6 × 8 to touch the keys.