Relay testing device

Abstract

The invention discloses a relay testing device, which relates to the technical field of power electronic measurement and control and comprises an automatic voltage regulating module, a parameter testing module, a micro-control processor and a display module. The parameter test module comprises a test end, a test parameter output end, a constant current source sub-module, a numerical control power supply sub-module and a signal processing sub-module. The test end and the test parameter output end are respectively connected with the constant current source sub-module, the data power supply sub-module and the signal processing sub-module. A voltage output end and a test end of the automatic voltage regulating module are respectively connected with the relay, a test parameter output end is connected with a test parameter input end of the micro-control processor, and a test result output end of the micro-control processor is connected with a test result input end of the display module. An experimenter only needs to connect the relay with the voltage output end and the testing end, the relay testing device can achieve automatic testing of the relay, recording and processing of testing results and other operations, and the testing efficiency of the relay is improved.

Description

Technical Field

[0001] This application relates to the field of power electronic measurement and control technology, and more specifically, to a relay testing device. Background Technology

[0002] A relay is an electrical control device that consists of a control system and a controlled system. When the input to the control system reaches the operating voltage or current, the controlled system will perform a corresponding action, i.e., the relay's armature will engage. Therefore, relays are often considered a type of "automatic switch," using a small current to control a large current in operation, playing an important role in circuits for automatic adjustment, safety protection, and signal conversion. To ensure the reliability of the relays used, they need to be tested.

[0003] Currently, multimeters and oscilloscopes are commonly used to test relays. The testing process requires the experimenter to follow the entire process, and when testing different parameters of the relay, the experimenter needs to reset the wiring method or circuit parameters, which results in low testing efficiency. Summary of the Invention

[0004] In view of the above problems, this application provides a relay testing device to solve the problem of low efficiency in existing relay testing.

[0005] To achieve the above objectives, the following solution is proposed:

[0006] The first aspect of this application provides a relay testing device, including: an automatic voltage regulation module, a parameter testing module, a microcontroller, and a display module;

[0007] The automatic voltage regulation module includes a voltage output terminal;

[0008] The parameter testing module includes: a test terminal, a test parameter output terminal, a constant current source submodule, a numerical control power supply submodule, and a signal processing submodule. The test terminal and the test parameter output terminal are respectively connected to the constant current source submodule, the data power supply submodule, and the signal processing submodule.

[0009] The microcontroller processor includes: a test parameter input terminal and a test result output terminal;

[0010] The display module includes a test result input terminal;

[0011] The voltage output terminal and the test terminal are respectively connected to a relay;

[0012] The test parameter output terminal is connected to the test parameter input terminal;

[0013] The test result output terminal is connected to the test result input terminal.

[0014] In one possible implementation, the automatic voltage regulation module includes: a battery, a half-bridge rectifier circuit, a transformer circuit, a feedback circuit, an automatic voltage regulation circuit, and a control circuit;

[0015] The control circuit has a control output terminal and a feedback receiving terminal. The control output terminal is connected to the half-bridge rectifier circuit. The feedback receiving terminal is connected to the automatic voltage regulation circuit and the feedback circuit respectively. The automatic voltage regulation circuit is connected to the feedback circuit. The transformer circuit is connected between the half-bridge rectifier circuit and the feedback circuit. The feedback circuit is connected in parallel with the transformer circuit.

[0016] The voltage output terminal of the transformer circuit is connected to the relay.

[0017] In one possible implementation, the half-bridge rectifier circuit includes at least two switching transistors, each of which is connected to the control output terminal of the control circuit.

[0018] In one possible implementation, the feedback circuit includes a series-connected resistor module and an optocoupler, the output of which is connected to the feedback receiver of the microcontroller.

[0019] In one possible implementation, it further includes: a clamp for securing at least one type of relay, the clamp being connected to the voltage output terminal and the test terminal respectively.

[0020] In one possible implementation, it further includes a printing module, wherein the input terminal of the printing content of the printing module is connected to the test result output terminal of the microcontroller.

[0021] In one possible implementation, it further includes a scanning module, wherein the scanning result output terminal of the scanning module is connected to the scanning result matching terminal of the microcontroller.

[0022] In one possible implementation, it further includes a communication module, wherein the information input terminal of the communication module is connected to the test result output terminal of the microcontroller.

[0023] In one possible implementation, the communication module includes at least a serial communication interface or a Wi-Fi module.

[0024] The relay testing device provided in this application can automatically adjust the output voltage through an automatic voltage adjustment module, providing the corresponding operating voltage for the relay. This eliminates the need for experimenters to adjust the voltage according to different relays, reducing the complexity of the testing operation.

[0025] When the output voltage across the relay is adjusted to the operating voltage, the parameter testing module performs parameter testing on the relay based on the constant current source submodule, CNC power supply submodule, and signal processing submodule. It measures various relay parameters such as contact resistance, rated current, pull-in voltage, pull-in current, release voltage, release current, pull-in time, and release time. The measured parameters are then sent to the microcontroller, which performs statistical calculations and other processing on the parameters to obtain the test results for the relay. The test results are then displayed on the display module for the experimenter to view.

[0026] Based on this, the experimenter only needs to connect the relay to the voltage output terminal and the test terminal respectively, and the relay testing device can realize automatic testing of the relay, as well as recording and processing of test results, thus improving the testing efficiency of the relay. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a relay testing device provided in an embodiment of this application;

[0029] Figure 2 A circuit diagram of an automatic voltage regulation module provided in an embodiment of this application;

[0030] Figure 3 A circuit diagram of a relay testing device provided in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of another relay testing device provided in an embodiment of this application.

[0032] Legend:

[0033] 10-Battery; 20-Half-bridge rectifier circuit; 30-Transformer circuit; 40-Feedback circuit; 50-Automatic voltage regulation circuit; 60-Control circuit; 101-Housing; 102-Clamp; 103-Touch display screen; 104-Scanner; 105-Printer; 106-Touch keys. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] Currently known relay parameter testing devices all require an external power supply. However, these external power supplies are bulky and inconvenient to carry. Furthermore, different relays require different test voltages, necessitating the use of different external power supplies by the experimenter. Testing different relay parameters also requires reconfiguring the connected test circuit, a cumbersome process. Therefore, existing relay parameter testing devices cannot achieve automated relay testing. The entire testing process requires the experimenter to monitor it closely and manually analyze the parameter test results, making it impossible to adapt to special conditions such as relay performance trends.

[0036] To address the low efficiency of relay testing caused by the aforementioned reasons, this application proposes a relay testing device, referring to... Figure 1 The present application provides a schematic diagram of the structure of a relay testing device, which includes: an automatic voltage adjustment module, a parameter testing module, a microcontroller, and a display module.

[0037] The automatic voltage regulation module includes a voltage output terminal;

[0038] The parameter testing module includes: a test terminal, a test parameter output terminal, a constant current source submodule, a numerical control power supply submodule, and a signal processing submodule. The test terminal and the test parameter output terminal are respectively connected to the constant current source submodule, the data power supply submodule, and the signal processing submodule.

[0039] The microcontroller processor includes: a test parameter input terminal and a test result output terminal;

[0040] The display module includes a test result input terminal;

[0041] The voltage output terminal and the test terminal are respectively connected to the relay;

[0042] The test parameter output terminal is connected to the test parameter input terminal;

[0043] The test result output terminal is connected to the test result input terminal.

[0044] The automatic voltage regulator module can continuously adjust the output voltage. For example, if the initial output voltage of the automatic voltage regulator module is 0V, after connecting the voltage output terminal of the automatic voltage regulator module to the relay, it will adjust the output voltage by 1V each time, gradually adjusting the output voltage to the relay's operating voltage of 5V. Alternatively, the automatic voltage regulator module can also adjust the output voltage irregularly. After connecting the voltage output terminal of the automatic voltage regulator module to the relay, it can obtain the relay's rated voltage or operating voltage, such as 5V. Then, the automatic voltage regulator module will first adjust the output voltage from 0 to 4V in a large increment, and then gradually adjust the output voltage from 4V to 5V in small increments to avoid over-adjustment.

[0045] When the relay receives test voltages such as operating voltage and rated voltage through its voltage output terminal, the parameter testing module performs parameter tests on the relay through the constant current source submodule, the CNC power supply submodule, and the signal processing submodule. The constant current source submodule, the CNC power supply submodule, and the signal processing submodule are electronic modules integrated from constant current source circuits, CNC power supply circuits, and signal processing circuits, respectively. The output or test terminal of each submodule is connected to the relay, and the submodules are connected in parallel to achieve independent testing of the relay.

[0046] During testing, each submodule can independently test the relays simultaneously. If testing the relays by one submodule would interfere with the testing of other submodules, the relays can be tested sequentially. For example, if the constant current source submodule needs to control the current flowing to the relay to be constant, it will affect the test parameters of the CNC power supply submodule for the relay. Therefore, the constant current source submodule can test the relay first. After the constant current source submodule completes its test, the connection between the test terminal of the constant current source submodule and the relay is automatically disconnected, or the operation of the constant current source submodule is stopped, and the CNC power supply submodule starts to test the relay.

[0047] The constant current source submodule provides a constant current to the relay contacts, which can test the relay's load capacity and temperature characteristics under specific current conditions. It can also determine the contact resistance by measuring the voltage drop across the relay contacts under constant current.

[0048] The CNC power supply submodule can control the output voltage and current. Therefore, the CNC power supply submodule can gradually increase the output voltage while monitoring the current through the relay. When the relay contacts close, the voltage and current values ​​at this time are recorded to determine the relay's activation threshold and ensure that the relay can reliably activate within the specified voltage range. Similarly, the CNC power supply submodule can also gradually decrease the output voltage and monitor the changes in the current through the relay. When the relay contacts open, the voltage and current values ​​at this time are recorded to determine the relay's release performance after losing voltage support, such as release voltage and release current.

[0049] The signal processing submodule can simulate different load currents to test the relay's operation under various current conditions, verifying whether it meets the design requirements for rated current and rated voltage. The signal processing submodule can also precisely control the application time of the excitation signal and measure the relay's response speed to test its operating time.

[0050] In summary, the parameter testing module can test parameters such as coil resistance, rated current, contact resistance, pull-in voltage, release voltage, pull-in time, release time, pull-in bounce time, and release bounce time of the relay. This allows for testing multiple parameters of the relay without adjusting the relay's circuit connection or parameter configuration.

[0051] It is understood that the parameter testing module is used to measure the parameters of the relay. The diversity of testing functions that the relay testing device can achieve depends on the parameter testing module. Therefore, in the embodiments of this application, the sub-modules in the parameter testing module used for relay parameter testing are not limited to the constant current source sub-module, CNC power supply sub-module and signal processing sub-module mentioned above. For example, electronic modules integrated with test circuits such as pull-in voltage and release voltage test circuits, dielectric withstand voltage and insulation resistance test circuits are also possible.

[0052] After completing the relay test, the constant current source submodule, CNC power supply submodule, and signal processing submodule in the parameter testing module send the test parameters to the microcontroller through the test parameter output terminal. In this embodiment, the microcontroller is used to statistically analyze and store the test parameters. In this embodiment, the microcontroller can be an ARM-Cortex-M4, whose powerful data processing capabilities allow it to classify and store data. Furthermore, the parameter statistical results in the form of data tables and charts are output to the display module for the experimenter to view the relay test results.

[0053] In summary, the relay testing device provided in this application can automatically adjust the output voltage through the automatic voltage adjustment module, providing the corresponding operating voltage for the relay. This eliminates the need for operators to adjust the voltage according to different relays, reducing the complexity of the testing operation. When the output voltage across the relay is adjusted to the operating voltage, the parameter testing module, based on the constant current source submodule, CNC power supply submodule, and signal processing submodule, performs parameter testing on the relay, measuring various relay parameters such as contact resistance, rated current, pull-in voltage, pull-in current, release voltage, release current, pull-in time, and release time. The obtained parameters are then sent to the microcontroller, which performs statistical calculations and other processing on the parameters to obtain the test results for the relay. These results are displayed on the display module for operators to view.

[0054] Based on this, the experimenter only needs to connect the relay to the voltage output terminal and the test terminal respectively, and the relay testing device can realize automatic testing of the relay, as well as recording and processing of test results, thus improving the testing efficiency of the relay.

[0055] Next, other possible implementations in the embodiments of this application will be described.

[0056] Reference Figure 2 The present application provides a circuit diagram of an automatic voltage regulation module, which includes: a battery 10, a half-bridge rectifier circuit 20, a transformer circuit 30, a feedback circuit 40, an automatic voltage regulation circuit 50, and a control circuit 60.

[0057] The control circuit 50 has a control output terminal and a feedback receiving terminal. The control output terminal is connected to the half-bridge rectifier circuit 20. The feedback receiving terminal is connected to the automatic voltage regulating circuit 50 and the feedback circuit 40 respectively. The automatic voltage regulating circuit 50 is connected to the feedback circuit 40. The transformer circuit 30 is connected between the half-bridge rectifier circuit 20 and the feedback circuit 40. The feedback circuit 40 and the transformer circuit 30 are connected in parallel. The voltage output terminal of the transformer circuit 30 is connected to a relay.

[0058] Battery 10 is used to input current to various circuits in the automatic voltage regulation module. To improve the convenience of the relay testing device, the battery 10 used for power supply can be a lithium battery or other convenient battery.

[0059] The half-bridge rectifier circuit 20 includes at least two switching transistors, namely... Figure 2In the transformer circuit 30, each of the switching transistors Q1 and Q2 is connected to the control output terminal of the control circuit 60. Q1 and Q2 are switched on alternately to convert direct current into pulsed direct current. Q1 and Q2 are connected to the control circuit 60, which controls the pulse width (high-level time) of the pulsed direct current by controlling the duration of the alternating switching of Q1 and Q2, thereby controlling the voltage value at the left end of the transformer circuit 30 and thus regulating the output voltage at the right end of the transformer circuit 30.

[0060] The feedback circuit 40 includes a series-connected resistor module and an optocoupler U1, the output of which is connected to the feedback receiver of the microcontroller. Figure 2 In this circuit, the resistor module includes resistors R4 and R5. The feedback circuit 40 is connected in parallel with the transformer circuit 30, so the voltage across the feedback circuit 40 is equal to the output voltage, used for tracking the output voltage. The output voltage is divided by resistors R4 and R5 in the feedback circuit 40 and then sent to the optocoupler U1. The optocoupler U1 unidirectionally sends the divided voltage to the control circuit 60.

[0061] The automatic voltage regulation circuit 50 is used for continuously adjustable voltage. The system uses a controllable gain amplifier to amplify the error signal. By changing the gain of the controllable gain amplifier, the voltage value sent to the feedback receiving end of the control circuit 60 is changed, thereby realizing the continuous adjustment of the output voltage.

[0062] The control circuit 60 is the core circuit for voltage regulation and has a significant impact on the overall performance of the device. Therefore, the cost-effective SG3535A is used, and the control method is constant frequency pulse width modulation. Upon receiving the voltage value from the feedback circuit 40 and / or the automatic voltage regulation circuit 50, the control circuit 60 determines the amount of adjustment to the output voltage and regulates the output voltage by controlling the alternation of the switching transistors in the half-bridge rectifier circuit 20.

[0063] The automatic voltage regulation module eliminates the constraints of power cables between the relay and the external power supply. The automatic voltage regulation module can be moved around and operates. The continuous adjustability of the output voltage reduces the complexity of operation. There is no need to adjust the voltage according to different relays, which truly realizes the functions of intelligent voltage regulation and automatic testing.

[0064] In one possible implementation, refer to Figure 3 The present application provides a circuit diagram of a relay testing device. The relay testing device may further include: a clamp for fixing at least one type of relay, the clamp being connected to the voltage output terminal and the test terminal respectively.

[0065] The fixture is used to fix the relay. Various sizes of fixtures can be customized to fit a variety of relays. The various sizes of fixtures can be integrated into the relay testing device to meet the field testing needs of different relays.

[0066] Optionally, the fixture should be provided with a contact fixing point corresponding to the adapted relay, so that the relay contacts can be fixed in a preset position. The preset position should be made of a conductive material such as metal, so that the voltage output terminal and the test terminal are respectively connected to the conductive material of the preset position, thereby realizing the connection between the voltage output terminal and the test terminal and the relay fixed on the fixture.

[0067] Based on this, when testing relays, researchers only need to find a fixture of suitable size or model on the relay testing device and fix the relay on the fixture to complete the testing of various parameters of the relay. The simplified testing process improves the efficiency of relay testing.

[0068] In one possible implementation, refer to Figure 3 The relay testing device may also include a printing module, wherein the input terminal of the printing module is connected to the test result output terminal of the microcontroller.

[0069] The printing module is used for information output. The microcontroller sends the statistically obtained relay test parameter results to the printing module, which prints out the data and charts. This saves the experimenter from copying the test results from the display module and avoids possible copying errors, thus improving the accuracy of the test results obtained by the experimenter.

[0070] Optionally, the barcode can be printed out and affixed to the relay to mark it, allowing researchers to easily obtain parameter results by scanning the barcode during subsequent experiments. This enables full-lifecycle management of the relay through tracking and statistics.

[0071] In one possible implementation, refer to Figure 3 The relay testing device may also include: a scanning module, wherein the scanning result output terminal of the scanning module is connected to the scanning result matching terminal of the microcontroller.

[0072] The scanning module is used for information input. It scans the barcode printed by the printing module and sends the barcode to the microcontroller via the scan result output terminal. The microcontroller then searches the relay test result database for a matching relay test result based on the barcode and outputs the result through the display module for the experimenter to view. Based on this, the scanning module enables data tracking of the relays.

[0073] In one possible implementation, refer to Figure 3 The relay testing device may also include a communication module, whose information input terminal is connected to the test result output terminal of the microcontroller. The communication module includes at least a serial communication interface or a Wi-Fi module.

[0074] The communication module is used to connect to mobile devices such as PCs, mobile phones, and tablets to send the test results of the relays to remote users. The communication module can communicate with the outside world in three ways: serial communication, SWD communication, and WIFI network communication.

[0075] Reference Figure 4 The present application provides a schematic diagram of another relay testing device, illustrating an optional implementation of the relay testing device provided in this application.

[0076] The relay testing device includes: housing 101, fixture 102, touch screen 103, scanner 104, printer 105, and touch keys 106.

[0077] The automatic voltage adjustment module, parameter testing module, and microcontroller of the relay testing device are integrated inside the housing 101, improving the aesthetics and convenience of the relay testing device.

[0078] Ten clamps 102 of different sizes are provided on the housing 101 for fixing the relay. Each clamp is connected to the voltage output terminal of the automatic voltage regulation module and the test terminal of the parameter test module hidden inside the housing 101. The circuit will only conduct and test the relay when the relay is fixed on the clamp 102.

[0079] The touch display screen 103 is equivalent to the display module described above. Its test result input terminal is connected to the test result output terminal of the microcontroller processor and is used to display the test results.

[0080] Scanner 104 is equivalent to the scanning module described above, and printer 105 is equivalent to the printing module described above. Please refer to the above for understanding, and it will not be repeated here.

[0081] The touch key 106 is connected to the instruction input terminal of the microcontroller and is used to send instructions to the microcontroller to start or stop the test. Optionally, the parameters for testing the relay can also be selected individually via the touch key.

[0082] Based on this, the relay testing device proposed in this application can simultaneously meet the requirements of convenience, testing accuracy, and high testing efficiency.

[0083] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0084] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0085] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A relay testing device, characterized in that, include: Automatic voltage regulation module, parameter testing module, microcontroller and display module; The automatic voltage regulation module includes a voltage output terminal; The parameter testing module includes: a test terminal, a test parameter output terminal, a constant current source submodule, a numerical control power supply submodule, and a signal processing submodule. The test terminal and the test parameter output terminal are respectively connected to the constant current source submodule, the data power supply submodule, and the signal processing submodule. The microcontroller processor includes: a test parameter input terminal and a test result output terminal; The display module includes a test result input terminal; The voltage output terminal and the test terminal are respectively connected to a relay; The test parameter output terminal is connected to the test parameter input terminal; The test result output terminal is connected to the test result input terminal.

2. The relay testing device according to claim 1, characterized in that, The automatic voltage regulation module includes: a battery, a half-bridge rectifier circuit, a transformer circuit, a feedback circuit, an automatic voltage regulation circuit, and a control circuit. The control circuit has a control output terminal and a feedback receiving terminal. The control output terminal is connected to the half-bridge rectifier circuit. The feedback receiving terminal is connected to the automatic voltage regulation circuit and the feedback circuit respectively. The automatic voltage regulation circuit is connected to the feedback circuit. The transformer circuit is connected between the half-bridge rectifier circuit and the feedback circuit. The feedback circuit is connected in parallel with the transformer circuit. The voltage output terminal of the transformer circuit is connected to the relay.

3. The relay testing device according to claim 2, characterized in that, The half-bridge rectifier circuit includes at least two switching transistors, each of which is connected to the control output terminal of the control circuit.

4. The relay testing device according to claim 2, characterized in that, The feedback circuit includes a series resistor module and an optocoupler, the output of which is connected to the feedback receiver of the microcontroller.

5. The relay testing device according to claim 1, characterized in that, Also includes: A clamp for fixing at least one type of relay, the clamp being connected to the voltage output terminal and the test terminal respectively.

6. The relay testing device according to claim 5, characterized in that, Also includes: A printing module, wherein the input terminal of the printing content of the printing module is connected to the output terminal of the test result of the microcontroller.

7. The relay testing device according to claim 6, characterized in that, Also includes: The scanning module has its scanning result output terminal connected to the scanning result matching terminal of the microcontroller.

8. The relay testing device according to claim 7, characterized in that, Also includes: A communication module, wherein the information input terminal of the communication module is connected to the test result output terminal of the microcontroller.

9. The relay testing device according to claim 8, characterized in that, The communication module includes at least a serial communication interface or a Wi-Fi module.

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