CN207232281U - A kind of exchange conversion module automatic testing equipment - Google Patents

Abstract

The utility model provides an automatic test device for an AC conversion module, which includes a host computer, a standard signal source connected to the host computer by communication, a signal detection device, a test quantity output switching module and a signal detection switching module; the test quantity output switching module is provided with at least two test channels Quantity output circuit, the input side of each test quantity output circuit is connected to the standard source, the output side is used to connect the input terminal of the AC conversion module to be tested, and the input side and the output side are connected through the corresponding electric control switch; the signal detection switch The module is equipped with a signal detection circuit corresponding to the number of test output circuits. The input side of the signal detection circuit is used to connect the output end of the AC conversion module to be tested, and the output side is connected to the signal detection device. The electric control switch connection. The technical scheme provided by the utility model can test the multi-channel channels of the AC conversion module to be tested through one-time connection, thereby improving the working efficiency.

Description

An automatic test device for an AC conversion module

technical field

The utility model belongs to the technical field of electric equipment detection, in particular to an automatic testing device for an AC conversion module.

Background technique

The AC conversion module is an important part of the secondary protection equipment in the power system. It can convert the current/voltage on the secondary side of the current/voltage transformer in the power system into a small current/voltage that can be used by the protection device. It can be used in power systems, etc. occasions are widely used. Therefore, the quality of the AC conversion module directly affects whether the secondary protection equipment of the power system can operate normally.

In order to ensure the quality of the AC conversion module, it is necessary to test the characteristics of the conversion ratio accuracy, linearity, and phase before the AC conversion module leaves the factory. The current commonly used test method is to build a temporary test environment to manually test the performance of the AC conversion module according to the technical requirements of the components. When setting up the test environment, it is necessary to manually operate the standard source to generate the required standard signal, and transmit the standard signal to the AC conversion module to be tested through the corresponding wiring, and then use a high-precision detection instrument to detect the output signal of the module to be tested, according to the output The signal judges the performance of the AC conversion module to be tested. However, since the AC conversion module often has multiple channels, the existing test method can only test one of them each time, resulting in relatively low test efficiency. And in the test process, the generation of the standard signal, the connection of the line and the judgment of the test result are all manually participated. Therefore, the test result will be largely affected by the subjective consciousness of the tester, resulting in the measurement of the AC conversion module. The performance does not match the actual performance.

Utility model content

The utility model provides an automatic testing device for an AC conversion module, which is used for improving the efficiency of performance testing of the AC module.

In order to achieve the above object, the technical solution provided by the utility model is:

An automatic test device for an AC conversion module, including a host computer, the host computer is connected to a standard signal source and a signal detection device by communication; it also includes a test quantity output switching module and a signal detection switching module connected to the host computer by communication;

The test quantity output switching module is provided with at least two test quantity output circuits, the input side of each test quantity output circuit is connected to a standard source, the output side is used to connect the input end of the AC conversion module to be tested, and each test quantity output circuit The input side and output side are connected through the corresponding electric control switch;

The signal detection switching module is provided with a signal detection circuit corresponding to the number of test quantity output circuits. The input side of the signal detection circuit is used to connect the output end of the AC conversion module to be tested, and the output side is connected to the signal detection device. Each signal detection circuit The input side and output side are connected through corresponding electric control switches.

Because the technical solution provided by the utility model can test multiple channels of the AC conversion module to be tested through one connection, it can improve work efficiency and reduce workload. In addition, the standard source, test output switching module, signal detection switching module and detection module are all connected to the host computer through communication, so the test process can be controlled by the command script set at the test host, reducing manual participation and making the test results more accurate.

Further, it also includes a backplane plug-in and a test case, the backplane plug-in is arranged in the test case, and the test quantity output switching module and the signal detection switching module are all set in the form of plug-ins; the backplane plug-in is provided for connecting to the The interface for measuring the AC conversion module, the interface for connecting the test output switching module and the interface for connecting the signal detection switching module, the test output switching module and the signal detection switching module are connected to the AC conversion module to be tested through the backplane plug-in.

Each module in the automatic test device for the AC conversion module is in the form of a plug-in, which is convenient for later maintenance and upgrading.

Further, the backplane plug-in is also provided with a power plug-in, and the power plug-in supplies power to the test quantity output switching module and the signal detection switching module through the backplane.

Further, the electric control switch is a relay, and the contact part of each relay is set in the corresponding test quantity output circuit or signal detection circuit.

The relay is used as the electric control switch, and its control method is relatively simple and convenient.

Further, the coil part of each relay is provided with a corresponding control circuit, and each coil control circuit is provided with a corresponding photocoupler; the positive pole on the input side of each photocoupler is used to connect the power supply, and the negative pole is used to receive the control signal; each photocoupler The anode on the output side of the relay is used to connect the coil part of the corresponding relay, and the cathode is used for grounding.

Further, the test quantity output switching module and the signal detection switching module are connected through an RS232 interface host computer communication.

Further, the host computer is connected to the standard signal source and the signal detection device through Ethernet communication.

Description of drawings

Fig. 1 is the structural representation of test cabinet in the embodiment;

Fig. 2 is the schematic diagram that plug-in is set in the test case in the embodiment;

Fig. 3 is the schematic diagram of the test case voltage switching plug-in in the embodiment;

Fig. 4 is the schematic diagram of the test case current switching plug-in in the embodiment;

Fig. 5 is the working principle diagram of test cabinet in the embodiment;

Fig. 6 is the flowchart of upper computer software control in the embodiment;

Fig. 7 is a flowchart of the automatic test in the embodiment.

Detailed ways

The utility model provides an automatic testing device for an AC conversion module, which is used for improving the efficiency of performance testing of the AC module.

In order to achieve the above object, the technical solution provided by the utility model is:

An automatic test device for an AC conversion module, including a host computer, the host computer is connected to a standard signal source and a signal detection device by communication; it also includes a test quantity output switching module and a signal detection switching module connected to the host computer by communication;

The test quantity output switching module is provided with at least two test quantity output circuits, the input side of each test quantity output circuit is connected to a standard source, the output side is used to connect the input end of the AC conversion module to be tested, and each test quantity output circuit The input side and output side are connected through the corresponding electric control switch;

The signal detection switching module is provided with a signal detection circuit corresponding to the number of test quantity output circuits. The input side of the signal detection circuit is used to connect the output end of the AC conversion module to be tested, and the output side is connected to the signal detection device. Each signal detection circuit The input side and output side are connected through corresponding electric control switches.

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model will be further described.

This embodiment provides an automatic test device for an AC conversion module, as shown in Figure 1, including a host computer, a test box, a standard source and an acquisition module, the host computer is connected to the test box through RS232 bus communication, and connected to the acquisition module through Ethernet communication And the standard source module, the test box is connected to the board to be tested through the fixture.

The composition of the test box is shown in Figure 2, including power supply plug-in, auxiliary switch plug-in 1, auxiliary switch plug-in 2 and backplane plug-in, power supply plug-in, auxiliary switch plug-in 1 and auxiliary switch 1 is the test quantity output switching plug-in, and the auxiliary switching plug-in 2 is the signal detection switching plug-in. There is also a test interface on the backplane plug-in, and the test interface is used to connect the AC conversion module to be tested.

The power supply plug-in is used to provide voltage for the backplane plug-in. In order to meet the voltage requirements of the backplane plug-in and the equipment connected to the backplane plug-in, the power supply plug-in in this embodiment adopts a voltage auxiliary switching board with two output specifications of 5V and 24V.

Auxiliary switching plug-in 1, that is, the test volume output switching plug-in, its circuit structure is shown in Fig. The positive pole on the input side of the coupler is connected to the power supply VCC, and the negative pole is used to receive the corresponding control signal; the positive pole on the output side of each optocoupler is connected to the control coil of the corresponding relay, and the negative pole is grounded. One end of the coil part of each relay is connected to the power supply, and the other end is connected to the positive electrode corresponding to the output side of the photocoupler. The contact part of each relay is set in the corresponding test quantity output circuit, one side of which is connected to the input terminal of the AC conversion module to be tested, and the other side is connected to the output terminal of the test quantity signal output circuit.

The auxiliary switching plug-in 2, i.e. the signal detection switching plug-in, has a circuit structure as shown in Figure 4, wherein there are signal detection circuits corresponding in number to the test output circuit in the auxiliary switching plug-in 1, that is to say, there are 8 signal detection circuits, each Correspondingly, a relay and a photocoupler are provided in the signal detection circuit of each photocoupler. The positive pole of each photocoupler input side is connected to the power supply VCC, and the negative pole is used to receive the corresponding control signal; the positive pole of each photocoupler output side is connected to the corresponding relay. Control coil, negative ground. One end of the coil part of each relay is connected to the power supply, and the other end is connected to the positive electrode corresponding to the output side of the photocoupler. The contact part of each relay is set in the corresponding signal test circuit, one side of which is connected to the input end of the signal detection circuit, and the other side is connected to the output end of the AC conversion module to be tested.

Both the test quantity output switching plug-in and the signal detection switching plug-in are provided with corresponding RS232 interfaces, and communicate with the host computer through the corresponding RS232 interface, and receive corresponding control instructions from the host computer. The working principle of the automatic test device for the AC conversion module in this embodiment is shown in Figure 5. When a certain channel of the AC conversion module to be tested needs to be tested, the upper computer sends corresponding control commands to the auxiliary switching plug-in 1 and the auxiliary switching plug-in 2 , this way corresponds to the test quantity switching circuit in the auxiliary plug-in 1. The negative pole of the input side of the optocoupler receives a low potential signal. The poles are also conducting, at this time, the coil part of the corresponding relay is energized, and the contact part is activated. The photocoupler and relay corresponding to the signal detection circuit in the auxiliary switch plug-in 2 also perform corresponding actions, so that the signal source- The AC conversion module to be tested and the acquisition module are connected. The acquisition module adopts a multimeter and is equipped with an Ethernet communication module connected to the upper computer. The multimeter detects the output signal of the AC conversion module to be tested and sends it to the upper computer through Ethernet. The upper computer communicates to the AC according to the output information of the AC conversion module The performance of the conversion module is analyzed and judged, and a test report is formed.

For the AC module testing device provided in this embodiment, the software control process at the host computer is shown in Figure 6. Before the test starts, the testers analyze and test the AC conversion module to be tested, and formulate the corresponding test process and test Method, and according to the test process and test method, write the automatic test command script file, and compile the test report template. For the same type of test object, it is only necessary to compile the test command script and test report template once.

After preparing the numbered test command script and test report template, the tester configures the corresponding automatic test command file and test report file at the upper computer automatic test software, and then starts the upper computer software to perform automatic testing. After the test is completed, check the test report and confirm Whether the test object is qualified or not, the automatic test process is shown in Figure 7.

Claims (7)

1. a kind of exchange conversion module automatic testing equipment, including host computer, host computer communication connection standard signal source and signal Detection device；Switch it is characterized in that, further including with the test volume output handover module of host computer communication connection and signal detection Module；

The test volume output handover module is equipped with least two-way test volume output circuit, per the input of road test volume output circuit Side connects standard source, and outlet side is used for the input terminal for connecting exchange conversion module to be measured, the input of every test volume output circuit Connected between side and outlet side by corresponding electric-controlled switch；

The signal detection handover module is equipped with signal deteching circuit corresponding with test volume output circuit quantity, signal detection electricity The input side on road is used for the output terminal for connecting exchange conversion module to be measured, and outlet side connection signal supervisory instrument, is examined per bars Connected between the input side and outlet side of slowdown monitoring circuit by corresponding electric-controlled switch.

2. a kind of exchange conversion module automatic testing equipment according to claim 1, it is characterised in that further include backboard and insert Part and test cabinet, backboard plug-in unit are arranged in test cabinet, the test volume output handover module and signal detection switching mould Block is set in the form of plug-in unit；The backboard plug-in unit is equipped with the interface for being used for connecting exchange conversion module to be measured, for connecting The interface and interface for connecting signal detection handover module of test volume output handover module, test volume output handover module and Signal detection handover module is connected by backboard plug-in unit with exchange conversion module to be measured.

A kind of 3. exchange conversion module automatic testing equipment according to claim 2, it is characterised in that the backboard plug-in unit On be additionally provided with power insert, power insert exports handover module by backboard for the test volume and signal detection handover module supplies Electricity.

A kind of 4. exchange conversion module automatic testing equipment according to claim 1, it is characterised in that the electric-controlled switch For relay, the contact part of each relay is arranged in corresponding test volume output circuit or in signal deteching circuit.

A kind of 5. exchange conversion module automatic testing equipment according to claim 4, it is characterised in that the line of each relay Circle part is equipped with corresponding control circuit, and corresponding photoelectrical coupler is equipped with each coil control circuit；Each photoelectrical coupler input The cathode of side is used to connect power supply, and anode is used to receive control signal；The anode of each photoelectrical coupler outlet side is used for connection pair The coiler part of relay is answered, cathode is used to be grounded.

6. a kind of exchange conversion module automatic testing equipment according to claim 1, it is characterised in that the test volume is defeated Go out handover module and signal detection handover module and connection is communicated by RS232 interface host computer.

7. a kind of exchange conversion module automatic testing equipment according to claim 1, it is characterised in that the host computer leads to Cross ethernet communication connection standard signal source and signal supervisory instrument.