CN203965517U - A kind of single-phase intelligent type electric energy meter - Google Patents

Abstract

A single-phase intelligent electric energy meter, which is mainly composed of a sampling unit, a metering unit, and a data processing unit with a data memory. The sampling unit includes a voltage sampling loop, a current sampling loop, and a zero line current sampling loop. The sampling circuits are respectively connected to the metering unit composed of metering chips, and the metering unit is connected to the data processing unit; the data processing unit is connected with a 485 communication interface and an infrared communication interface that can realize the automatic meter reading function, and is also connected There is an LED display; the voltage sampling loop mainly includes a resistor divider, and the current sampling loop mainly includes a manganin shunt, and the two loops are respectively processed by respective filter circuits and connected to convert the electric energy signal It is a measurement unit for pulse signals, and is connected by the measurement unit to a data processing unit that can perform power pulse collection, power accumulation, various calculations, analysis and processing, and save the results in the data memory; it has a simple structure and is easy to use It is convenient, reliable in use, high in precision, and capable of realizing intelligent meter reading.

Description

A single-phase intelligent electric energy meter

technical field

The utility model relates to a single-phase electric energy meter for electricity metering, especially a single-phase intelligent electric energy meter capable of intelligent meter reading, which belongs to the technical field of electric power metering.

Background technique

As a power meter, the use of the electric energy meter can be said to be quite popular. Whether in rural areas or cities, every household that uses electricity needs to install an electric energy meter that can indicate the electricity consumption. The structure of the early electric energy meters was relatively simple. People could only read the value of electricity consumption from the electric meter, and the value was continuous. The number of meter readings, that is, the monthly electricity consumption of the user in the current month. Therefore, this relatively primitive meter reading work not only has a large workload, but also has extremely low work efficiency. The power company needs to equip a large number of meter reading workers to complete this work, thereby increasing labor costs. With the increase of urban households and the doubled number of electricity users, this traditional meter reading method has been far behind the pace of the development of the times. Therefore, there is an urgent need for a simple structure, convenient use, and reliable use Good, high precision, intelligent energy meter that can realize intelligent meter reading. Although there are also smart electric energy meters with various structures on the market, there are still problems of one kind or another in terms of the composition of the structure and the effect of use.

Contents of the invention

The purpose of this utility model is to overcome the shortcomings of the existing technology, and provide a single-phase intelligent electric energy meter with simple structure, convenient use, good reliability, high precision, and intelligent meter reading.

The purpose of the utility model is accomplished through the following technical scheme, which is mainly composed of a sampling unit, a metering unit and a data processing unit with a data memory, and the sampling unit includes a voltage sampling loop, a current sampling loop and a zero line current The sampling circuit, the three sampling circuits are respectively connected to the metering unit composed of metering chips, and the metering unit is connected to the data processing unit; the data processing unit is connected with a 485 communication interface and infrared communication that can realize the automatic meter reading function interface, and also connected to an LED display.

The voltage sampling loop mainly includes a resistor divider, the current sampling loop mainly includes a manganin shunt, and the two loops are respectively processed by respective filter circuits and then connected to a circuit that can convert the electric energy signal into a pulse signal. The metering unit is connected by the metering unit to a data processing unit that can perform power pulse collection, power accumulation, various calculations, analysis and processing, and store the results in the data memory.

The data processing unit has a power supply and a clock chip, and is connected with a key input module for the user to control and operate the meter, and a switch control module.

The utility model belongs to an improvement on the prior art. It has the characteristics of simple structure, convenient use, good reliability, high precision, and the ability to realize intelligent meter reading.

Description of drawings

Figure 1 is a schematic diagram of the structure and principle of the utility model.

Figure 2 is a circuit schematic diagram of the sampling unit described in the utility model.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings: as shown in Figure 1, the utility model is mainly made up of sampling unit 1, metering unit 2 and the data processing unit 3 with data memory, and described sampling unit 1 includes voltage Sampling loop 11, current sampling loop 12 and zero line current sampling loop 13, three-way sampling loop is respectively connected to the metering unit 2 that is made up of metering chip, and is connected to data processing unit 3 by this metering unit 2; Said data processing unit 3 is connected with a 485 communication interface 31 and an infrared communication interface 32 that can realize the automatic meter reading function, and is also connected with an LED display 33, and the LED display includes an LED indicator 38, an LCD display 39 and a backlight display 40.

2, the voltage sampling loop 11 mainly includes a resistor divider R104, R105, R107, R108, the current sampling loop mainly includes a manganin shunt 14, and the two loops pass through respective filter After the circuit is processed, it is connected to the metering unit 2 that can convert the electric energy signal into a pulse signal, and the metering unit 2 is connected to perform power pulse collection, power accumulation, various calculations, analysis and processing, and save the results in the data Data processing unit 3 in memory.

The data processing unit 3 has a power supply 34, a clock chip 35 and a backup battery 41, and is connected with a key input module 36 for the user to control and operate the electric meter, and a switch control module 37.

Example:

When the smart meter described in the utility model is working, the voltage and current (including the zero-line current) are sampled (the voltage is sampled through a resistor divider, and the current is sampled through a manganin shunt), converted into a sampled signal and sent to the metering chip after filtering. , the metering chip converts the energy signal into a pulse signal and sends it to the CPU (also known as the data processing unit in the MCU) for power pulse collection, power accumulation and various calculation and analysis processing, and the results are stored in the data storage; At the same time, the CPU completes functional processing such as security authentication, infrared, 485 meter reading, and LCD display.

Claims (3)

1. A single-phase intelligent electric energy meter, which is mainly composed of a sampling unit, a metering unit and a data processing unit with a data memory, is characterized in that said sampling unit includes a voltage sampling loop, a current sampling loop and a neutral current The sampling circuit, the three sampling circuits are respectively connected to the metering unit composed of metering chips, and the metering unit is connected to the data processing unit; the data processing unit is connected with a 485 communication interface and infrared communication that can realize the automatic meter reading function interface, and also connected to an LED display. 2. The single-phase intelligent watt-hour meter according to claim 1, wherein said voltage sampling loop mainly includes a resistor divider, said current sampling loop mainly includes a manganin shunt, and the two loops respectively After being processed by the respective filter circuits, it is connected to a metering unit that can convert the electric energy signal into a pulse signal, and the metering unit is connected to perform power pulse collection, power accumulation, various calculations, analysis and processing, and save the results. Data processing unit in data memory. 3. The single-phase intelligent electric energy meter according to claim 1 or 2, characterized in that the data processing unit has a power supply and a clock chip, and is connected with a key input module for the user to control and operate the electric meter , and pull the switch control module.