CN205015468U - Automatic test system of many electric energy meters - Google Patents

Abstract

An automatic test system for multi-watt-hour meters, including a computer, a communication board, a plurality of calibrated watt-hour meters, a standard source, a standard meter, an error meter, and a current terminal drawn from the standard source, which are connected in series to each calibrated watt-hour meter and the standard meter The current terminal of the standard source leads to the voltage terminal, which is connected in parallel with the corresponding voltage terminals of each watt-hour meter to be calibrated and the standard meter. The beneficial effect of the utility model is to reduce the workload of the factory test of the electric energy meter product and the hardware cost of the test source; it is highly safe and reliable, and since the whole process is completed by a computer, there are few human factors intervening, which greatly reduces the possibility of human error The information in the process is saved after completion, which greatly facilitates future query work and effectively guarantees the reliability and safety of the product. Reduced the factory inspection time of the product.

Description

An automatic test system for multi-watt-hour meters

technical field

The utility model relates to a test system for the accuracy of electric energy meters, in particular to an automatic test system for multiple electric energy meters.

Background technique

The electric energy meter automatic test platform and calibration system is a test system proposed to improve the company's production efficiency and product quality.

At present, the degree of automated testing of electric energy meters of electric equipment manufacturers is relatively low. Many electric energy meter tests still rely on manual testing. Manual testing requires a large number of personnel. Everyone needs a standard source and standard error table. At the same time, the standard source is a relatively expensive equipment, which greatly increases the cost of the company. Manual testing can only test one electric energy meter, but it cannot test multiple electric energy meters in parallel at the same time. The calibration results must be obtained by manual calculation, so the test time takes a long time Time is a huge waste of time, and a large amount of information needs to be recorded manually, which is also prone to errors. The use of multiple electric energy meter automation test platforms and systems not only improves the company's production efficiency, but also reduces the company's cost, and the company's product quality is also reliably guaranteed.

The utility model utilizes the communication between multiple electric energy meters, standard sources and error meters to complete the data sharing. Through the calibration system and the calculation of the shared data, the value of the measurement source is infinitely approached to meet the requirements of calibration, and at the same time, the calibration data is saved. The data in the table process for future query.

Contents of the invention

The purpose of the utility model is to propose an automatic testing system for multi-electric energy meters which improves testing efficiency.

In order to realize above-mentioned utility model object, the utility model adopts following technical scheme:

An automatic test system for multiple electric energy meters, including a computer, an automatic test module for multiple electric energy meters, a communication board, multiple electric energy meters to be calibrated, a standard source, a standard meter, an error meter,

The standard source leads to the current terminal, which corresponds to the current terminal of each watt-hour meter to be calibrated and the standard meter in series;

The voltage terminal of the standard source is connected in parallel with the corresponding voltage terminal of each watt-hour meter to be calibrated and the standard meter;

The input terminal of the electric energy meter to be calibrated is connected in series, the open input terminal of the electric energy meter to be calibrated is connected in series with the input terminal of the electric energy meter to be calibrated, and the input terminal of the electric energy meter to be calibrated is connected in series to the standard source open end;

The open-in public terminal of the electric energy meter to be calibrated is connected to the standard source open-out public terminal;

One end of the binary output terminal of the watt-hour meter to be calibrated is connected to the binary input terminal of the standard source,

The other end of the output terminal of the watt-hour meter to be calibrated is connected to the input common terminal of the standard source;

The pulse signal of the standard meter is incorporated into each error meter respectively, and the pulse signal of the watt-hour meter to be calibrated is connected to the corresponding terminal in the corresponding error meter;

The communication interface of the watt-hour meter to be checked and the standard source is connected to the communication board to communicate with the computer to realize data sharing.

The utility model also includes a printer to realize real-time printing of test results.

The utility model has the beneficial effects of reducing the workload of the factory test of the electric energy meter product and the hardware cost of the test source. The utility model saves the capital cost of the standard source and a large amount of labor wages, and greatly reduces the production cost.

Description of drawings

Fig. 1 is a schematic diagram of wiring of the utility model.

Fig. 2 is a test flow chart of the utility model.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in detail.

The test system is mainly composed of a computer, an automatic test module for multiple electric energy meters, a communication board, multiple electric energy meters that need to be calibrated, a standard source, a standard meter, an error meter, a printer and fixtures.

1) The computer is used to install the automatic test module and communication board of the electric energy meter, and at the same time, it can save the calibration data generated during the calibration process for later inspection.

2) The automatic test module of the electric energy meter is a test module that provides various algorithms for the correction of the electric energy meter.

3) The communication board is used for communication between the computer and multiple energy meters, error meters, standard sources and standard meters that need to be calibrated; (realize the exchange of messages between the host and the energy meter, standard source, error meter, and standard meter) .

4) Multiple calibrated energy meters are electric energy meters that need to be tested. These meters are bare meters that have just been produced without calibration, without downloading parameters, and have relatively poor accuracy coefficients.

5) The standard source is the reference device for measurement. This device can input the known current and voltage to the calibrated energy meter. The test module calibrates the energy meter according to the known current and voltage. Some standard sources also have their own binary input and output terminals. We can detect the binary input and output terminals of the watt-hour meter to be calibrated through the binary input and output terminals.

6) The standard meter is a monitoring meter to check whether there is any problem with the output of the standard source. We output the current and voltage and its active and reactive pulse constants through the standard source, and check whether the displayed value of the standard meter is close to the set value; (in within the allowable error range).

7) The tooling fixture is used to fix the wiring between the calibrated energy meter, source, standard meter and error meter, etc., and at the same time facilitates the installation and removal of the calibrated device fixture during the calibration process.

8) The printer is used to print the reports, certificates and barcodes of the electricity meters that pass the test after the test is completed.

9) The error meter is to complete the monitoring of the pulse error of the electric energy meter.

10) The voltage PT isolation is a voltage transformer, (because the current and voltage of the electric energy meter are collinear during detection, the isolation PT is added to prevent the current from being shunted due to voltage access, resulting in the difference between the current collected by the meter and the current given by the standard source).

Claims (2)

1. A multi-watt-hour meter automated testing system, comprising, a computer, a multi-watt-hour meter automated test module, a communication board, a plurality of watt-hour meters to be checked, a standard source, a standard meter, and an error meter, characterized in that, The standard source leads to the current terminal, which corresponds to the current terminal of each watt-hour meter to be calibrated and the standard meter in series; The voltage terminal of the standard source is connected in parallel with the corresponding voltage terminal of each watt-hour meter to be calibrated and the standard meter; The input terminal of the electric energy meter to be calibrated is connected in series, the open input terminal of the electric energy meter to be calibrated is connected in series with the input terminal of the electric energy meter to be calibrated, and the input terminal of the electric energy meter to be calibrated is connected in series to the standard source open end; The open-in public terminal of the electric energy meter to be calibrated is connected to the standard source open-out public terminal; One end of the binary output terminal of the watt-hour meter to be calibrated is connected to the binary input terminal of the standard source, The other end of the output terminal of the watt-hour meter to be calibrated is connected to the input common terminal of the standard source; The pulse signal of the standard meter is incorporated into each error meter respectively, and the pulse signal of the watt-hour meter to be calibrated is connected to the corresponding terminal in the corresponding error meter; The communication interface of the watt-hour meter to be checked and the standard source is connected to the communication board to communicate with the computer to realize data sharing. 2. A kind of multi-electric energy meter automatic test system according to claim 1, is characterized in that, also comprises printer, realizes the real-time printing of test result.