Portable relay contactor performance detector

Abstract

The utility model belongs to the field of relay detectors, and discloses a portable relay contactor performance detector, which is provided with a direct-current high-voltage module and an alternating-current high-voltage module, can apply direct-current or alternating-current high voltage to a load, and realizes intelligent control and detection through a control circuit board. Different testing modes are selected for testing according to requirements, so that testing requirements of different types of relays and contactors are met. According to the utility model, the signal acquisition and processing module can acquire level signals of the load in real time and send the level signals to the control module unit for processing, so that high-precision testing of the electrical performance of the load is realized. According to the utility model, the touch display screen is adopted for control interaction, so that the operation is more intelligent and convenient, a user can input a test instruction through the touch screen, and the system can correspondingly execute a control instruction.

Description

Technical Field

[0001] The utility model belongs to the field of relay detection, and in particular relates to a portable relay contactor performance detector. Background Art

[0002] A relay is an electronically controlled device that produces a predetermined step change in the output when the change in the input quantity reaches the specified requirements. It has an interactive relationship between the input circuit (control quantity) and the output circuit (controlled quantity). As an "automatic switch" that controls strong electricity with weak electricity, relays are often used to control circuits and switch signals. The main characteristics of a relay are relay characteristics, that is, the response of the relay to action, retention, release and repeated action. Relay characteristics are mainly measured by indicators such as action voltage, action current, action power, action time, return voltage and return time. A contactor is a switching device that uses electromagnetic principles to control the main circuit through a control circuit. As a typical electromagnetic device, contactors are widely used in industrial control occasions such as motor and power load control. The performance of a contactor depends mainly on the dynamic characteristics of its pull-in and segmentation processes, which are mainly measured by indicators such as action voltage, action current, action power, action time, return voltage and return time. To sum up, the characteristics of relays and contactors are mainly determined by parameters such as operating voltage, operating current, operating power, operating time, return voltage and return time. Therefore, detection instruments that can simultaneously measure the above parameters are particularly important.

[0003] Chinese patent CN 219369939 U discloses a relay multi-parameter calibrator, which includes a housing, the housing is provided with a test interface for connecting the relay to be tested, the test interface is connected to the positive and negative ends and contacts of the relay coil to be tested through a wire connector, and the housing contains an MCU module, a human-computer interaction module, a digital-to-analog conversion module, a high-voltage test module, a collection feedback module, and a power conversion module. This solution combines the traditional process of calibration through multimeters, DC adjustable sources, withstand voltage testers and other equipment into one instrument. It only needs to connect the relay to be tested, and the calibrator automatically completes the calibration test process, which saves time and effort and greatly improves the test efficiency. However, since the high-voltage test module used in the scheme adopts a DC-DC boost converter, the scheme cannot measure the parameters such as the action voltage, action current, action power, action time, return voltage and return time of the AC relay and AC contactor, and naturally cannot evaluate the relay characteristics of the AC relay and the dynamic characteristics of the AC contactor. In addition, the human-computer interaction module in this solution separates the command input key and the data information display screen into two parts, and communicates with the MCU separately, which inevitably leads to problems such as complex circuit structure, increased circuit volume, reduced circuit reliability and increased circuit cost. Finally, the digital-to-analog conversion module circuit in this solution uses an MCU external digital-to-analog converter, which also leads to problems such as complex circuit structure, increased circuit volume and increased circuit cost. Summary of the invention

[0004] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a portable relay contactor performance tester capable of testing the electrical performance of a DC load or an AC load.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A portable relay contactor performance tester comprises a housing, a test interface for connecting a relay to be tested and a contactor is arranged on the housing, the test interface is used to connect a load, and a control circuit board is arranged in the housing;

[0007] The control circuit board includes a control module, the control module is connected to the touch display screen, the signal acquisition and processing module, the DC high voltage module and the AC high voltage module, the DC high voltage module is connected to the AC high voltage module, and the signal acquisition and processing module, the DC high voltage module and the AC high voltage module are all connected to the load through the test interface;

[0008] The touch screen is used to input test instructions;

[0009] The control module is used to send corresponding control instructions to the DC high voltage module and the AC high voltage module according to the test instructions;

[0010] The DC high voltage module is used to send DC high voltage to the AC high voltage module or load;

[0011] The AC high voltage module is used to convert the received DC high voltage into AC high voltage and send it to the load;

[0012] The signal acquisition and processing module is used to collect the level signal of the load and send it to the control module.

[0013] A lithium battery is arranged in the shell, and the lithium battery is connected to a DC power supply module, and the DC power supply module is used to supply power to the downstream modules.

[0014] The voltage of the lithium battery is 24V, and the DC power module is used to convert the 24V DC voltage into 12V, 5V and 3.3V DC voltages step by step.

[0015] The shell is provided with a charging port, and the charging port is connected to the lithium battery.

[0016] The test interface includes a first group of test interfaces and a second group of test interfaces. The first group of test interfaces can be connected to the positive and negative ends and contacts of the DC load through wires, and the second group of test interfaces can be connected to the positive and negative ends and contacts of the AC load through wires.

[0017] DC loads include DC relays and DC contactors, and AC loads include AC relays and AC contactors.

[0018] The control module is connected to the data storage module, and the data storage module is used to store the data sent to the control module by the signal acquisition and processing module.

[0019] The control module adopts STM32 series microcontroller.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The utility model is equipped with a DC high-voltage module and an AC high-voltage module, which can apply DC or AC high voltage to the load, and realize intelligent control and detection through the control circuit board, and select different test modes for testing according to needs to meet the testing requirements of different types of relays and contactors. The signal acquisition and processing module in the utility model can collect the level signal of the load in real time, and send it to the control module unit for processing, so as to realize high-precision testing of the electrical performance of the load. The utility model adopts a touch display screen for control interaction, making the operation more intelligent and convenient. The user can input the test instruction through the touch screen, and the system will execute the control instruction accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 It is a system diagram of the utility model;

[0024] Among them, 1. Shell; 2. The first set of test interfaces; 3. The second set of test interfaces; 4. Touch screen; 5. Charging port. DETAILED DESCRIPTION

[0025] In order to further understand the content of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments are only for explaining the utility model and are not intended to limit it.

[0026] See also Figure 1 The utility model includes a shell 1, on which a test interface for connecting a relay to be tested and a contactor is provided, the test interface is used to connect a load, the test interface includes a first group of test interfaces 2 and a second group of test interfaces 3, the first group of test interfaces 2 can be connected to the positive and negative ends and contacts of a DC load through a wire, the second group of test interfaces 3 can be connected to the positive and negative ends and contacts of an AC load through a wire, a control circuit board is provided in the shell 1, and a touch display screen 4 is provided on the shell 1; a lithium battery is provided in the shell 1, the lithium battery is connected to a DC power module, the DC power module is used to power a downstream module, the voltage of the lithium battery is 24V, the DC power module is used to convert the 24V DC voltage into 12V, 5V and 3.3V DC voltages step by step, and a charging port 5 is provided on the shell 1, and the charging port 5 is connected to the lithium battery.

[0027] Preferably, the DC load includes a DC relay and a DC contactor, and the AC load includes an AC relay and an AC contactor.

[0028] See also Figure 2 The control circuit board includes a control module, the control module is connected to the touch display screen 4, the signal acquisition and processing module, the DC high voltage module and the AC high voltage module, the DC high voltage module is connected to the AC high voltage module, and the signal acquisition and processing module, the DC high voltage module and the AC high voltage module are all connected to the load through the test interface.

[0029] The touch screen 4 is used to input test instructions; the control module is used to send corresponding control instructions to the DC high voltage module and the AC high voltage module according to the test instructions; the DC high voltage module is used to send DC high voltage to the AC high voltage module or the load; the AC high voltage module is used to convert the received DC high voltage into AC high voltage and send it to the load; the signal acquisition and processing module is used to collect the level signal of the load and send it to the control module. The control module is connected to the data storage module, and the data storage module is used to store the data sent to the control module by the signal acquisition and processing module.

[0030] When testing DC loads:

[0031] The first group of test interfaces 2 on the housing 1 are connected to the positive and negative ends and contacts of the DC load through wires, and a test instruction is input on the touch screen 4. After the control module receives the test instruction issued by the touch screen 4, the control module will issue a control instruction for the DC high voltage module, and the DC high voltage module will load the DC high voltage to both ends of the DC load coil according to the control instruction issued by the control module. The signal acquisition and processing module collects the signals at both ends of the DC load coil in real time and uploads them to the control module, which stores the received signals in the data storage module.

[0032] When testing AC loads:

[0033] The second group of test interfaces 3 on the housing 1 are connected to the positive and negative ends and contacts of the AC load through wires, and a test instruction is input on the touch screen 4. After receiving the test instruction issued by the touch screen 4, the control module will issue a control instruction to the DC high voltage module, and the DC high voltage module will send the DC high voltage to the AC high voltage module. After the AC high voltage module converts the received DC high voltage into AC high voltage, it will load the AC high voltage to both ends of the AC load coil according to the control instruction issued by the control module. The signal acquisition and processing module collects the signals at both ends of the DC load coil in real time and uploads them to the control module, which stores the received signals in the data storage module.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.

Claims

1. A portable relay contactor performance tester, characterized in that: It comprises a housing (1), the housing (1) is provided with a test interface for connecting a relay to be tested and a contactor, the test interface is used to connect a load, and a control circuit board is provided in the housing (1); The control circuit board comprises a control module, the control module is connected to the touch display screen (4), the signal acquisition and processing module, the DC high voltage module and the AC high voltage module, the DC high voltage module is connected to the AC high voltage module, and the signal acquisition and processing module, the DC high voltage module and the AC high voltage module are all connected to a load via a test interface; The touch display screen (4) is used to input test instructions; The control module is used to send corresponding control instructions to the DC high voltage module and the AC high voltage module according to the test instructions; The DC high voltage module is used to send DC high voltage to the AC high voltage module or load; The AC high voltage module is used to convert the received DC high voltage into AC high voltage and send it to the load; The signal acquisition and processing module is used to collect the level signal of the load and send it to the control module.

2. A portable relay contactor performance tester according to claim 1, characterized in that: A lithium battery is arranged in the housing (1), and the lithium battery is connected to a DC power module, and the DC power module is used to supply power to downstream modules.

3. A portable relay contactor performance tester according to claim 2, characterized in that: The voltage of the lithium battery is 24V, and the DC power module is used to convert the 24V DC voltage into 12V, 5V and 3.3V DC voltages step by step.

4. A portable relay contactor performance tester according to claim 2, characterized in that: The housing (1) is provided with a charging port (5), and the charging port (5) is connected to a lithium battery.

5. A portable relay contactor performance tester according to claim 1, characterized in that: The test interface comprises a first group of test interfaces (2) and a second group of test interfaces (3); the first group of test interfaces (2) can be connected to the positive and negative ends and contacts of a DC load via a wire, and the second group of test interfaces (3) can be connected to the positive and negative ends and contacts of an AC load via a wire.

6. A portable relay contactor performance tester according to claim 5, characterized in that: DC loads include DC relays and DC contactors, and AC loads include AC relays and AC contactors.

7. A portable relay contactor performance tester according to claim 1, characterized in that: The control module is connected to the data storage module, and the data storage module is used to store the data sent to the control module by the signal acquisition and processing module.

8. A portable relay contactor performance tester according to claim 1, characterized in that: The control module adopts STM32 series microcontroller.

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