CN115396338A - A load management terminal test device and test method - Google Patents

Abstract

The invention discloses a load management terminal testing device and a testing method. The testing device consists of eight parts, namely a crimping unit, a power supply control unit, an Ethernet communication unit, a relay control unit, an auxiliary terminal communication unit, a current analog output unit, a pulse metering unit and a virtual meter communication unit. The device only needs to press the load management terminal onto the pressing connection unit before testing, does not need to manually finish the connection of strong current terminal voltage, current, weak current terminal remote control, remote signaling, pulse and RS485, and avoids the possibility of personal electric shock by controlling the power supply of the switch control device, thereby saving time, being safe and easy to operate. The testing method is characterized in that the upper computer software of the PC terminal sends a testing instruction, the instruction is sent to the terminal through the testing device, the terminal returns an instruction execution result, the upper computer software automatically judges whether the result is correct or incorrect, the manual instruction issuing and manual checking processes are omitted, and the testing efficiency is improved.

Description

A load management terminal test device and test method

technical field

The invention relates to the field of automatic testing of low-voltage power consumption terminals, in particular to a load management terminal testing device and testing method.

Background technique

The load management terminal is a terminal device installed on the site of the special transformer user to realize functions such as remote meter reading, electric energy measurement, equipment working condition, customer electric load and electric energy monitoring for the special transformer user. The load management terminal adopts a wall-mounted structure. At present, the laboratory uses a hanging table to test the load management terminal. Before the test, terminal wiring operations such as voltage, RS485, pulse, remote signaling, and remote control must be performed. This method requires more manual wiring. Moreover, various parameters need to be set by matching function test software, which takes a lot of time and is cumbersome to operate.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the problems existing in the above-mentioned prior art, and provide a load management terminal testing device and testing method, aiming at solving the problems of more manual wiring, long time-consuming, cumbersome operation and safety in the prior art. It is easy to operate and improves the test efficiency.

Embodiments of the present invention provide a load management terminal test device and test method, the design method includes:

A load management terminal test device, characterized in that the test device consists of a crimping unit, a power supply control unit, an Ethernet communication unit, a relay control unit, an auxiliary terminal communication unit, a current analog output unit, a pulse metering unit, and a virtual meter communication unit It consists of eight parts, as follows:

The crimping unit provides the voltage and current terminal of the load management terminal and the terminal block of the auxiliary terminal of the load management terminal, which is used for powering on the terminal and connecting the auxiliary terminal;

The power supply control unit provides power-off and power-on control of the load management terminal;

The Ethernet communication unit provides communication control between the test device and PC-side PC software, and communication between the test device and the load management terminal;

The relay control unit provides open circuit and short circuit control at the end of the load management terminal;

The auxiliary terminal communication unit connects the remote control terminal of the terminal with the remote signal terminal for testing the terminal control function and remote signal displacement;

The current analog output unit provides three-phase current output;

The pulse metering unit provides the metering function of the output pulse of the load management terminal;

The virtual meter communication unit provides meter reading reply messages to test the meter reading function of the terminal.

A test method for a load management terminal test device, characterized in that, the details are as follows:

The load management terminal includes multiple uplink communication interfaces of RS232, RS485-3, infrared, Ethernet and 4G channels;

The load management terminal includes RS485-1, RS485-2 downlink meter reading communication interface;

The load management terminal includes round 1, round 2, round 3, round 4 and a total of 5 remote control ports for alarm;

The load management terminal includes remote signaling 1, remote signaling 2, remote signaling 3, remote signaling 4 and door contacts with a total of 5 remote signaling interfaces;

Load management terminals include positive, positive, second, and common pulse output terminals;

The test device is connected to the load management terminal through Ethernet to verify the Ethernet communication function of the load management terminal;

The test device and the PC-side host computer establish a communication connection through Ethernet, and the PC and the test device need to be connected with a network cable before testing;

The relay control unit controls the end of the load management terminal to open and short-circuit the connection. The inter-acquisition of the load management terminal recognizes the change of open and short-circuit status, and the status word of the ammeter changes. Open and short circuit identification function;

The current analog output unit is used to output small current, and the host computer at the PC end tests the measurement accuracy and alarm monitoring of the terminal by controlling the output of the current;

The pulse measurement unit converts the positive, positive and second pulses output by the load management terminal into a power value, and compares the power value with the inter-acquisition power value of the load management terminal to verify the correctness of the pulse output;

The load management terminal provides RS485-1 and RS485-2 as downlink meter reading communication ports, and the virtual meter communication unit can reply the meter reading message sent by the load management terminal through RS485, which is used to simulate the actual meter reading response on site;

PC-side host computer software judges the correctness of terminal data reading and storage by reading the data stored in the load management terminal;

When the result message returned by the load management terminal is different from the expected result message of the host computer software, the host computer software will prompt that the test failed;

When the result message returned by the load management terminal is the same as the expected result message of the host computer software, the host computer software will prompt that the test is successful.

Compared with the prior art, the present invention mainly has the following beneficial effects:

In the load management terminal test device and test method provided above, before the test of the device, only the load management terminal needs to be crimped to the crimping unit, and there is no need to manually complete the wiring of voltage, current, remote control, remote signal, pulse, and 485 ports , saving time and labor; only need to control the power supply of the equipment through the switch, safe and easy to operate; the virtual meter communication unit can reply the meter reading message sent by the load management terminal through RS485, which is used to simulate the actual meter reading reply on site, without connecting through the actual meter , reduce manpower, material resources, resource occupation, and test more comprehensively. Functional test results can be displayed through the software interface of the host computer, which is convenient and intuitive. The automatic acquisition and detection of test results eliminates the process of manually issuing instructions and manual inspection, and improves test efficiency.

Description of drawings

FIG. 1 is a structural diagram of a load management terminal testing device provided by an embodiment of the present invention;

Fig. 2 is a front view of a load management terminal testing device provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, features and advantages of the present invention more obvious and comprehensible, the embodiments of the present invention will be clearly and completely described below in conjunction with the specific implementation methods involved in the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work, such as embodiments that only change the usage without changing the basic principles involved in the claims, all belong to the protection scope of the present invention.

The implementation of the present invention will be described in detail below in conjunction with specific embodiments.

Fig. 1 shows a structure diagram of a load management terminal testing device.

The device consists of eight parts: crimping unit, power supply control unit, Ethernet communication unit, relay control unit, auxiliary terminal communication unit, current analog output unit, pulse measurement unit, and virtual meter communication unit, as follows:

The crimping unit provides the voltage and current terminals of the load management terminal and the terminal block of the auxiliary terminal of the load management terminal, which is used for terminal power-on and auxiliary terminal remote control, remote signaling, pulse, and RS485 connection physical connection. The crimping unit has a scalable Auxiliary terminal binding post, also suitable for other types of terminals;

The power supply control unit provides power-off and power-on control for the load management terminal, and controls the power-on and power-off of the end of the load management terminal through the control switch;

The Ethernet communication unit provides communication control between the test device and PC software and the communication between the test device and the load management terminal. The PC software sends communication messages to the test device through Ethernet, and the Ethernet communication unit will receive the PC The messages sent by the upper computer software at the end are forwarded to the three uplink communication ports of RS232, RS485-3 or infrared of the load management terminal respectively, and then the messages returned by the above ports are forwarded back to the upper computer software;

The relay control unit provides open-circuit and short-circuit control at the end of the load management terminal by controlling the opening and closing of the relay. The terminal will recognize the open-short circuit signal and feed back the status to the host computer software, which can judge the correctness of the status recognition;

The auxiliary terminal communication unit connects the remote control terminal of the terminal with the remote signal terminal. When the output state of the remote control terminal changes, the remote signal will change position, and the upper computer software on the PC side detects whether the terminal position is normal by detecting the position change state of the remote signal;

The current analog output unit provides three-phase current output, which can test the current measurement accuracy and alarm detection of the load management terminal;

The pulse metering unit provides the metering function of the output pulse of the load management terminal, including positive, positive, and second pulses;

The virtual meter communication unit is used to simulate the reply message of the actual electric meter. When the load management terminal sends a meter reading message through RS485, the virtual meter communication unit receives the message and gives a reply.

The specific workflow of the testing method of this device is as follows:

Figure 2 shows a front view of a load management terminal test device, the test device includes an insulation table 1, a terminal indicator 2, a device power control button 3, a crimping unit 4, a test device 232 communication port 5, and an infrared communication port of the test device 6 and the Ethernet communication port 7 between the test device and the terminal, and the Ethernet communication port 8 between the test device and the PC.

Place the load management terminal at the table position and press the crimping unit tightly to confirm that the physical connection between the terminal of the crimping unit and the auxiliary terminal of the terminal is normal. At this time, the terminal round 1, round 2, round 3, and round Remote signaling 1, remote signaling 2, remote signaling 3, remote signaling 4 alignment connection;

Connect the RS232 and infrared port of the terminal to the 232 communication port and the infrared communication port of the test device through the connecting line, and connect the terminal Ethernet port to the Ethernet communication port of the test device through the Ethernet cable;

Connect the test device to the host computer on the PC side through Ethernet;

Turn on the power control button of the device to supply power to the test device;

The upper computer software on the PC side sends a power-on command, and the power supply control unit controls the meter position to be powered on, and the terminal is powered on and started at this time;

Send control parameters and energy meter files to the terminal through the host computer software;

Send the meter reading command to the terminal through the host computer software, and the Ethernet communication unit will forward the message to the RS232, RS485-3, and infrared ports of the load management terminal in turn. After receiving the message, the terminal sends a meter reading message on port 485 , the virtual meter communication unit replies to the meter reading message, and the terminal returns the meter reading reply data to the host computer software, and the software judges whether the function of the RS232, RS485-3, and infrared ports is qualified by judging whether the message is consistent with the data to be replied;

Perform data point copying through the terminal screen buttons, check the returned data on the screen, and verify the correctness of the copying function;

The terminal power control start command is sent through the host computer software, and the terminal enters the control state according to the power data returned by reading the virtual meter. The data returned by the virtual meter remains unchanged, and the terminal will first trip in round 1. At this time, the remote signal 1 changes , the host computer software judges whether the control function is qualified by reading the terminal remote signaling status;

The upper computer software controls the opening and closing of the test state relay control unit and the output current of the current analog output unit, resulting in open circuit, short circuit and other states at the end of the terminal meter. The terminal will recognize this state and generate an alarm event. The upper computer software reads the terminal handover. Status bit and alarm content to judge whether the alarm function is qualified;

The host computer software controls the output current of the current analog output unit of the test device, and the pulse metering unit measures the output pulse power value of the terminal. The host computer verifies whether the pulse output function is correct by reading the power value of the pulse metering unit and comparing it with the terminal power;

In the load management terminal test device and test method provided above, before the test of the device, only the load management terminal needs to be crimped to the crimping unit, and there is no need to manually complete the wiring of voltage, current, remote control, remote signal, pulse, and 485 ports , saving time and labor; only need to control the power supply of the equipment through the switch, safe and easy to operate; the virtual meter communication unit can reply the meter reading message sent by the load management terminal through RS485, which is used to simulate the actual meter reading reply on site, without connecting through the actual meter , reduce manpower, material resources, and resource occupation, and test more comprehensively. The function test results can be displayed through the software interface of the host computer, which is convenient and intuitive. The automatic acquisition and detection of test results eliminates the process of manually issuing instructions and manual inspection, and improves test efficiency.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (9)

1. A load management terminal testing device and a testing method are characterized by comprising eight parts, namely a crimping unit, a power supply control unit, an Ethernet communication unit, a relay control unit, an auxiliary terminal communication unit, a current simulation output unit, a pulse metering unit and a virtual meter communication unit, and the testing method comprises the following steps:

s1, placing a terminal at a corresponding position of a testing device, and enabling a crimping unit to be in charge of physical connection of a meter tail and other auxiliary terminals;

s2, the testing device is connected with a PC end upper computer through an Ethernet communication unit;

s3, the upper computer software sends a power-on command, the power-on of the bit is controlled through the power supply control unit, and the terminal is powered on and started;

s4, the auxiliary terminal communication unit is connected with a load management terminal remote signaling and turns to judge a terminal control function;

s5, the upper computer software controls the relay control unit to be opened and closed, and the functions of identifying the open and short circuit states of the terminal are verified;

s6, the current analog output unit outputs current, the pulse metering unit meters the output pulse power value of the terminal, and the output accuracy of the terminal pulse is verified;

s7, upper computer software issues an ammeter reading command to the terminal through the Ethernet communication unit, the virtual meter communication unit replies a meter reading message, and the terminal data reading function is verified.

2. The load management terminal testing apparatus and method of claim 1, wherein the crimping unit provides voltage and current terminals of the load management terminal and a terminal block of the auxiliary terminal of the load management terminal for power-on and auxiliary terminal connection of the terminal.

3. The apparatus and method of claim 1, wherein the power control unit provides power-off control for the load management terminal.

4. The device and the method for testing the load management terminal according to claim 1, wherein the ethernet communication unit provides the testing device with a communication connection with the PC-side upper computer to verify the ethernet communication function of the load management terminal.

5. The device and the method for testing the load management terminal as claimed in claim 1, wherein the relay control unit is used for controlling the tail open and short circuit connection of the load management terminal and verifying the open and short circuit identification function of the load management terminal.

6. The device and the method as claimed in claim 1, wherein the auxiliary terminal communication unit is used to connect the remote signaling and remote control terminal of the load management terminal to verify the control function of the load management terminal.

7. The load management terminal testing device and method according to claim 1, wherein the current analog output unit is used for outputting a small current, and the PC-side upper computer tests the metering accuracy and alarm monitoring of the load management terminal by controlling the output of the current.

8. The device and method for testing the load management terminal according to claim 1, wherein the pulse measurement unit is used for converting the pulse of the load management terminal into the power value, and verifying the correctness of the pulse output of the load management terminal.

9. The load management terminal testing device and method of claim 1, wherein the virtual meter communication unit is configured to simulate an actual meter reading reply in response to a meter reading message sent by the load management terminal, and verify correctness of data reading and storage of the load management terminal.

Images