CN205643684U - Electric energy meter reliability testing system - Google Patents

Abstract

The utility model discloses a reliability test system for an electric energy meter, which comprises a sealed box body, and the box body is provided with an electric energy meter data acquisition module, a pulse acquisition module, a standard electric energy meter, a camera, an industrial computer, a GPRS communication module, a PC, a temperature A humidity controller and a relay module; the input ends of the electric energy meter data acquisition module are respectively connected with each meter to be tested, and the output ends of the electric energy meter data acquisition module are connected with the industrial computer. The utility model can realize the transmission of remote images, clocks, environmental parameters, power data and various control quantities through the industrial computer and its supporting data acquisition and control modules, in conjunction with the existing RS-485 communication function of the electric energy meter. The lower computer can receive and save the data of electric energy, voltage, current, frequency, power factor and other data in the test electric energy meter through the electric energy meter data acquisition module and pulse acquisition module, and further compare with the standard meter data to evaluate its measurement accuracy.

Description

A Reliability Test System for Electric Energy Meter

technical field

The utility model relates to the technical field of test and measurement, in particular to a reliability test system for electric energy meters.

Background technique

At present, according to the national regulation DL/T 448-2000 "Technical Management Regulations for Electric Energy Metering Devices", the performance test of the electric energy meter is required before use to judge whether the accuracy and reliability of the meter meet the requirements for use.

In the past, these tests and verifications were carried out in the standard laboratories of manufacturers and watt-hour meter verification units. During the tests, it was necessary to ensure that the environmental influences such as temperature and humidity were within the range required by the regulations. This test method can only get the basic error of the electric energy meter in the standard environment, and it is not enough to judge the accuracy and reliability of the electric energy meter in the complex field environment.

In recent years, with the popularization of multifunctional electronic energy meters, new on-site calibration, remote transmission of power information, and fault alarm systems have begun to appear. The remote monitoring and even calibration of electric energy meters can be achieved by using the existing equipment and technology, but the automatic test system that can conduct comprehensive adaptability and long-term reliability tests on electric energy meters is still blank in China.

Utility model content

The purpose of this utility model is to provide a reliability test system for electric energy meters, which can test the comprehensive performance of electric energy meters of different manufacturers and models in complex field environments, and comprehensively evaluate the product quality.

The technical scheme that the utility model adopts is:

A reliability test system for an electric energy meter, comprising a test chamber, the test chamber is used to place a temperature and humidity controller and a meter to be tested; it also includes an electric energy meter data acquisition module, a pulse acquisition module, a standard electric energy meter, a camera, an industrial control Machine, GPRS communication module, PC machine, and temperature and humidity controller; The input end of described watt-hour meter data acquisition module connects each to-be-tested meter 485 communication interface, and the output end of watt-hour meter data acquisition module is connected with industrial computer ; The input end of the pulse collection module is respectively connected to the energy pulse and the time pulse output port of the tested electric energy meter and the standard electric energy meter; the described upper computer is remotely connected with the industrial computer through the GPRS communication module; The output terminals of the industrial computer are respectively connected with the industrial computer; the output terminals of the industrial computer are connected with the input terminals of the temperature and humidity controller.

The temperature and humidity controller includes a temperature and humidity sensor, a relay module, an electric heater, a refrigeration compressor and an evaporator, the output of the temperature and humidity sensor is connected to the input of the industrial computer, and the industrial computer is respectively connected to the electric heater through the relay module. , Refrigeration compressor and the control end of the evaporator are connected.

The data acquisition module of the electric energy meter adopts PCI-1622CU, which is used to collect the data of electric quantity, voltage, current and power factor in the electric energy meter for testing.

The pulse acquisition card adopts Advantech PCI-1780 pulse acquisition card.

The GPRS communication module adopts CM3180EP to realize the remote communication between the upper computer and the lower computer.

The model of the temperature and humidity controller is SM1910B_RS485.

The relay module adopts ER-4D40-M0 four-in four-out 485 relay module.

The utility model can realize the transmission of remote images, clocks, environmental parameters, power data and various control quantities through the industrial computer and its supporting data acquisition and control modules, and cooperate with the existing electric energy meter RS-485 communication function. Perform error test on 1~16 electric energy meters at the same time, and automatically judge whether there are faults or abnormalities in the electric energy meters; by setting the temperature and humidity controller, the temperature and humidity signals of the test inner box can be collected and controlled by the upper computer; in the lower function The electric energy, voltage, current, frequency, power factor and other data in the test electric energy meter are received and saved through the electric energy meter data acquisition module and the pulse acquisition module, and further compared with the standard meter data to evaluate its measurement accuracy. By testing the comprehensive performance of different manufacturers and different models of electric energy meters in complex field environments, the product quality can be comprehensively evaluated, and detailed references can be provided for ordering users.

Description of drawings

Fig. 1 is the electrical principle block diagram of the utility model.

detailed description

As shown in Figure 1, the utility model includes a sealed test box for placing a temperature and humidity controller and a meter to be tested. Also include electric energy meter data acquisition module, pulse acquisition module, standard electric energy meter, camera, industrial computer, GPRS communication module, PC, temperature and humidity controller and relay module; The input end of described electric energy meter data acquisition module connects each The 485 communication port of the tested meter is connected to the output terminal of the industrial computer. The data acquisition module of the electric energy meter adopts PCI-1622CU, which is used for the industrial computer to read the parameters such as voltage, current, power factor, frequency, etc. in the electric energy meter in real time. Set an appropriate threshold, and the industrial computer can automatically judge the abnormality and give a prompt on the host computer; the power and time information of each tested electric energy meter is output through the electric energy pulse and time pulse output port of the electric energy meter. The pulse acquisition module of the electric energy meter adopts PCI- The 1780 pulse acquisition card is used to collect the electric energy and time pulse of the test electric energy meter and the standard electric energy meter; the PCI-1780 pulse acquisition card collects and counts, and the industrial computer compares the synchronous pulse with the standard meter to calculate the electric energy measurement error; The output ends of the standard table and the camera are respectively connected with the industrial computer;

The temperature and humidity controller includes a temperature and humidity sensor, a relay module, an electric heater, a refrigeration compressor and an evaporator, the output of the temperature and humidity sensor is connected to the input of the industrial computer, and the industrial computer is respectively connected to the electric heater through the relay module. , Refrigeration compressor and the control end of the evaporator are connected.

The model of the temperature and humidity controller adopts SM1910B_RS485; it can accurately monitor and control temperature and humidity, and the error rate is small; the relay module adopts ER-4D40-M0 four-in and four-out 485 relay module; the utility model Using SM1910B_RS485 temperature and humidity sensor + ER-4D40-M0 four-input and four-out 485 relay module + electric heater + refrigeration compressor, evaporator, the industrial computer collects the internal temperature of the test system in real time through the 485 bus, and controls the heating through the relay module Or the refrigeration device works to reach and maintain the required experimental temperature (-20~60°C).

The utility model is widely used in the field of automation control through the industrial computer and its supporting data acquisition and control modules. Cooperating with the existing RS-485 communication function of the electric energy meter, the GPRS communication module adopts CM3180EP to realize the upper computer and the lower computer. remote communication. It can realize the transmission of remote images, clocks, environmental parameters, power data and various control quantities. The upper computer and the lower computer communicate through the GPRS communication module, so that functions such as on-site parameter configuration, error test, data collection, status monitoring, data storage and processing, and data remote transmission can be realized. The lower computer can receive and save the electric energy, voltage, current, frequency, power factor and other data in the test electric energy meter through the upper computer, and further compare with the standard table data to evaluate its measurement accuracy. Moreover, in order to test the comprehensive performance of different manufacturers and different models of electric energy meters in complex field environments, comprehensively evaluate their product quality, and provide detailed references for ordering users.

Claims (7)

1. an electric energy meter reliability test system, it is characterised in that: include that proof box, described proof box are used for placing humiture Controller and to be measured taken temperature；Also include electric energy meter data acquisition module, pulse collection module, standard electric energy meter, photographic head, work Control machine, GPRS communication module, PC and temperature and humidity controller；The input of described electric energy meter data acquisition module connects each Individual 485 communication interfaces of being taken temperature to be measured, the outfan of electric energy meter data acquisition module is connected with industrial computer；Described pulse is adopted Collection module input connects tested electric energy meter and the electrical energy pulse of standard electric energy meter and time pulse output end mouth respectively；Described Host computer is remotely connected with industrial computer by GPRS communication module；Described standard scale, the outfan of photographic head respectively with industry control Machine is connected；The outfan of described industrial computer is connected with the input of temperature and humidity controller.

Electric energy meter reliability test system the most according to claim 1, is characterized in that: described temperature and humidity controller includes Temperature Humidity Sensor, relay module, electric heater, refrigeration compressor and vaporizer, the outfan of Temperature Humidity Sensor and work Control machine input is connected, industrial computer by relay module respectively with the control of electric heater, refrigeration compressor and vaporizer End is connected.

Electric energy meter reliability test system the most according to claim 1, it is characterised in that: described electric energy meter data acquisition Module uses PCI-1622CU, the electricity in gathering test electric energy meter, voltage, electric current, power factor data.

Electric energy meter reliability test system the most according to claim 2, it is characterised in that: described pulse collection card uses Grind China's PCI-1780 pulse collection card.

Electric energy meter reliability test system the most according to claim 3, it is characterised in that: described GPRS communication module is adopted With CM3180EP, it is achieved host computer and the telecommunication of slave computer.

Electric energy meter reliability test system the most according to claim 4, it is characterised in that: described epidemic disaster controller Model use SM1910B_RS485.

Electric energy meter reliability test system the most according to claim 5, it is characterised in that: described relay module uses ER-4D40-M0 tetra-enters four and goes out 485 relay module.