Relay testing device

Abstract

The utility model 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 numerical control 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 electronics measurement and control technology, and more specifically, to a relay test device. Background Art

[0002] A relay is an electrical control device with a control system and a controlled system. When the input quantity of the control system reaches the operating voltage or current, the controlled system will produce corresponding actions, that is, the armature of the relay will be attracted. Therefore, a relay is usually regarded as an "automatic switch", using a small current to control the working process of a large current, and playing important roles such as automatic regulation, safety protection, and signal conversion in the circuit. To ensure the reliability of the relays used, it is necessary to test the relays.

[0003] Currently, multimeters, oscilloscopes, etc. are usually used to test relays. During the detection process, it is necessary for experimenters to track the whole process, and when testing different parameters of the relay, it is necessary for experimenters to reset the wiring method or circuit parameters, etc., resulting in the problem of low test efficiency. Utility Model Content

[0004] In view of this, this application provides a relay test device for solving the problem of low test efficiency of existing relays.

[0005] To achieve the above purpose, the following solutions are proposed:

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

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

[0008] The parameter test module includes: a test terminal, a test parameter output terminal, a constant current source sub-module, a digital control power supply sub-module, and a signal processing sub-module. The test terminal and the test parameter output terminal are respectively connected to the constant current source sub-module, the digital control power supply sub-module, and the signal processing sub-module;

[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] Among them, the voltage output terminal and the test terminal are respectively connected to the 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 a possible implementation, the automatic voltage regulation module includes: a battery, a half-bridge rectifier circuit, a voltage transformation 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, and the feedback receiving terminal is respectively connected to the automatic voltage regulation circuit and the feedback circuit. The automatic voltage regulation circuit is connected to the feedback circuit. The voltage transformation circuit is connected between the half-bridge rectifier circuit and the feedback circuit, and the feedback circuit is in parallel with the voltage transformation circuit;

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

[0017] In a possible implementation, the half-bridge rectifier circuit includes: at least two switching tubes, and each switching tube is respectively connected to the control output terminal of the control circuit.

[0018] In a possible implementation, the feedback circuit includes: a resistor module and an optocoupler connected in series, and the output terminal of the optocoupler is connected to the feedback receiving terminal of the microcontroller processor.

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

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

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

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

[0023] In a possible implementation, the communication module at least includes: a serial communication interface or a wifi module.

[0024] The relay test device provided by this application can realize automatic regulation of the output voltage through the automatic voltage regulation module, can provide corresponding operating voltages for the relays, and eliminates the need for experimenters to adjust the voltage according to different relays, reducing the complexity of the test operation.

[0025] When the output voltage across the relay is adjusted to the operating voltage, the parameter testing module 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 based on the constant current source sub-module, the numerically controlled power supply sub-module, and the signal processing sub-module, and sends the measured parameters to the microcontroller processor, enabling the microcontroller processor to perform processing such as statistics and calculation on the measured parameters, obtain the test result of the relay, and display the test result through 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 achieve automatic testing of the relay, as well as operations such as recording and processing of the test results, improving the testing efficiency of the relay. Brief Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0028] Figure 1 It is a schematic structural diagram of a relay testing device provided by an embodiment of the present invention;

[0029] Figure 2 It is a circuit diagram of an automatic voltage regulation module provided by an embodiment of the present invention;

[0030] Figure 3 It is a circuit diagram of a relay testing device provided by an embodiment of the present invention;

[0031] Figure 4 It is a schematic structural diagram of another relay testing device provided by an embodiment of the present invention.

[0032] Legend Explanation:

[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 - Fixture; 103 - Touch display screen; 104 - Scanner; 105 - Printer; 106 - Touch key. Detailed Embodiment

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be combined and arranged to form new technical solutions without contradiction or conflict, and all are within the scope of protection required by the present invention.

[0035] All known relay parameter detection devices currently require an external power supply. The external power supply is large in volume and not convenient to carry. Moreover, different relays require different test voltages, and experimental personnel need to replace the external power supply. When testing different parameters of the relay, the connected test circuit needs to be reset, and the process is cumbersome. Based on this, the existing relay parameter detection devices cannot achieve automatic testing of relays. The entire testing process of the relay requires experimental personnel to track the whole process, and manually count the parameter test results, and cannot detect special states such as the inferior trend of the relay.

[0036] To solve the problem of low relay testing efficiency caused by the above reasons, the embodiments of the present invention propose a relay testing device. Referring to Figure 1 , a schematic structural diagram of a relay testing device provided by the embodiments of the present invention. The relay testing device includes: an automatic voltage regulation module, a parameter testing module, a microcontroller processor, 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 sub-module, a numerical control power supply sub-module, and a signal processing sub-module. The test terminal and the test parameter output terminal are respectively connected to the constant current source sub-module, the numerical control power supply sub-module, and the signal processing sub-module;

[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] Wherein, 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 regulating module can realize continuous adjustment of the output voltage. For example, the initial output voltage of the automatic voltage regulating module is 0V. After the voltage output end of the automatic voltage regulating module is connected to the relay, it is forward adjusted by 1V each time to gradually adjust the output voltage to the relay's operating voltage of 5V; or the automatic voltage regulating module can also adjust the output voltage irregularly. After the voltage output end of the automatic voltage regulating module is connected to the relay, the rated voltage or operating voltage of the relay is obtained. Test voltage, such as 5V, the automatic voltage regulating module first adjusts the output voltage from 0 to 4V, and then gradually adjusts the output voltage from 4V to 5V in small increments to avoid over-adjustment.

[0045] When the relay receives the test voltages such as the operating voltage and the rated voltage through the voltage output terminal, the parameter test module performs parameter tests on the relay through the constant current source submodule, the digital control power supply submodule and the signal processing submodule. Among them, the constant current source submodule, the digital control power supply submodule and the signal processing submodule are electronic modules integrated with the constant current source circuit, the digital control power supply circuit and the signal processing circuit respectively. The output terminal or the test terminal of each submodule is connected to the relay, and each submodule is in parallel relationship to realize independent testing of the relay.

[0046] During the test process, each submodule can test the relay independently at the same time. If the test of the relay between submodules will interfere with the test of other submodules, the relays can be tested in sequence. For example, the constant current source submodule needs to control the current flowing to the relay to be a constant current, which will affect the test parameters of the relay by the CNC power supply submodule. Therefore, the constant current source submodule can be used to test the relay first. After the constant current source submodule test is completed, the connection between the test end 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 is started to test the relay.

[0047] Among them, the constant current source submodule can test the load capacity and temperature characteristics of the relay under specific current conditions by providing a constant current to the contacts of the relay. It can also determine the contact resistance by measuring the voltage drop across the contacts of the relay under a constant current.

[0048] The numerically controlled power supply sub-module can precisely control the output voltage and current. Therefore, the numerically controlled power supply sub-module can gradually increase the output voltage while monitoring the current passing through the relay. When the relay contact closes, the voltage and current values at this time are recorded to determine the pull-in threshold of the relay, ensuring its reliable pull-in within the specified voltage range. Similarly, the numerically controlled power supply sub-module can gradually decrease the output voltage and monitor the change in the current passing through the relay. When the relay contact opens, the voltage and current values at this time are recorded to determine the release performance of the relay after losing voltage support, such as the release voltage and release current.

[0049] The signal processing sub-module can test the operation of the relay under different current conditions by simulating different load currents to verify whether it meets the design requirements of the rated current and rated voltage. The signal processing sub-module can also precisely control the application time of the excitation signal and measure the response speed of the relay to test the operating time of the relay.

[0050] In summary, the parameter test module can implement the testing of parameters such as the 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, and can test multiple parameters of the relay without adjusting the circuit connection or parameter configuration of the relay.

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

[0052] After the constant current source sub-module, numerically controlled power supply sub-module, and signal processing sub-module in the parameter test module complete the testing of the relay, the tested parameters are sent to the microcontroller through the test parameter output terminal. In the embodiments of the present invention, the microcontroller is used to statistically analyze and store the tested parameters. In the embodiments of the present invention, the microcontroller can adopt ARM-Cortex-M4. The powerful data processing ability of the ARM-Cortex-M4 core enables it to classify and store the data. Further, the parameter statistical results in the form of data tables and charts are output to the display module for experimental personnel to view the relay test results.

[0053] In summary, the relay test device provided by the present application can automatically adjust the output voltage through the automatic voltage regulation module, and can provide the corresponding operating voltage for the relay, eliminating the need for experimenters to adjust the voltage according to different relays and reducing the complexity of the test operation. When the output voltage across the relay is adjusted to the operating voltage, the parameter test module 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 based on the constant current source sub-module, the digital control power supply sub-module, and the signal processing sub-module, and sends the measured parameters to the microcontroller processor, enabling the microcontroller processor to perform statistics, calculations, and other processing on the measured parameters to obtain the test results of the relay, and display the test results through the display module for experimenters to view.

[0054] Based on this, experimenters only need to connect the relay to the voltage output terminal and the test terminal respectively, and the relay test device can achieve automatic testing of the relay, as well as operations such as recording and processing of the test results, improving the test efficiency of the relay.

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

[0056] Refer to Figure 2 , a circuit diagram of an automatic voltage regulation module provided by an embodiment of the present invention, the automatic voltage regulation module includes: a battery 10, a half-bridge rectifier circuit 20, a voltage transformation 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, and the feedback receiving terminal is respectively connected to the automatic voltage regulation circuit 50 and the feedback circuit 40. The automatic voltage regulation circuit 50 is connected to the feedback circuit 40, the voltage transformation circuit 30 is connected between the half-bridge rectifier circuit 20 and the feedback circuit 40, and the feedback circuit 40 is connected in parallel with the voltage transformation circuit 30; the voltage output terminal of the voltage transformation circuit 30 is connected to the relay.

[0058] The battery 10 is used to input current to each circuit in the automatic voltage regulation module. Among them, to improve the convenience of the relay test device, the battery 10 for power supply can use a lithium battery or other convenient batteries.

[0059] The half-bridge rectifier circuit 20 includes at least two switching tubes, which are respectively Figure 2Q1 and Q2 in it, each switching tube is respectively connected to the control output terminal of the control circuit 60. Among them, Q1 and Q2 are alternately turned on to convert direct current into pulsed direct current. Q1 and Q2 are respectively connected to the control circuit 60, and the control circuit 60 controls the duration of the alternating turn-on of Q1 and Q2 to change the pulse width of the pulsed direct current, that is, the high-level time, so as to control the voltage value at the left end of the voltage conversion circuit 30, thereby realizing the adjustment of the output voltage at the right end of the voltage conversion circuit 30.

[0060] The feedback circuit 40 includes: a series-connected resistor module and an optocoupler U1, and the output terminal of the optocoupler is connected to the feedback receiving terminal of the micro-control processor. Among them, Figure 2 in, the resistor module includes resistors R4 and R5. The feedback circuit 40 is connected in parallel with the voltage conversion circuit 30, then the voltage value at both ends of the feedback circuit 40 is equal to the output voltage, and is used to track the output voltage. The output voltage is divided by the resistors R4 and R5 in the feedback circuit 40 and then sent to the optocoupler U1, and 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, and by changing the gain of the controllable gain amplifier, the voltage value sent to the feedback receiving terminal 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 realizing voltage adjustment and has a greater impact on the performance of the whole machine. Therefore, the relatively cost-effective SG3535A is adopted, and the control method adopts constant-frequency pulse width modulation. The control circuit 60 determines the adjustment amount of the output voltage after receiving the voltage value sent by the feedback circuit 40 and / or the automatic voltage regulation circuit 50, and adjusts the output voltage by controlling the alternation of the switching tubes in the half-bridge rectification circuit 20.

[0063] The automatic voltage regulation module solves the bondage of the power cord between the relay and the external power supply. The automatic voltage regulation module can work movably, and the continuous adjustability of the output voltage reduces the complexity of the operation. There is no need to adjust the voltage according to different relays, and the functions of intelligent voltage regulation and automatic testing are truly realized.

[0064] In a possible implementation, referring to Figure 3 , the circuit diagram of a relay test device provided by an embodiment of the present invention, the relay test device may further include: a fixture for fixing at least one type of relay, and the fixture is respectively connected to the voltage output terminal and the test terminal.

[0065] The fixture is used to fix the relay, and fixtures of various sizes can be customized to adapt to various relays. The fixtures of various sizes are integrated in the relay test device to meet the on-site requirements for testing different relays.

[0066] Optionally, a contact fixing position corresponding to the adapted relay should be provided on the fixture, so that the contacts of the relay can be fixed at a preset position, and 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 at the preset position, thereby realizing the connection between the voltage output terminal, the test terminal and the relay fixed on the fixture.

[0067] Based on this, when testing a relay, the experimenter only needs to find a fixture with a suitable size or model on the relay testing device and fix the relay on the fixture, then the testing of various parameters of the relay can be completed, simplifying the testing process and improving the relay testing efficiency.

[0068] In a possible implementation, referring to Figure 3 , the relay testing device may further include: a printing module, and the printing content input end of the printing module is connected to the test result output end of the microcontroller processor.

[0069] The printing module is used for information output. The microcontroller processor sends the parameter results of the relay test obtained by statistics to the printing module, and the printing module prints and outputs the data and charts, which can save the process of the experimenter copying the test results from the display module and avoid the possible copying errors during the copying process by the experimenter, improving the accuracy of the test results obtained by the experimenter.

[0070] Optionally, it can also be printed and output in the form of a barcode, and the barcode is pasted on the relay to mark the relay, so that the experimenter can obtain the parameter results in time by scanning the barcode next time, so as to complete the whole-life management of the relay tracking statistics.

[0071] In a possible implementation, referring to Figure 3 , the relay testing device may further include: a scanning module, and the scanning result output end of the scanning module is connected to the scanning result matching end of the microcontroller processor.

[0072] The scanning module is used for information input. The scanning module scans the barcode printed by the printing module, sends the barcode to the microcontroller processor through the scanning result output end, and the microcontroller processor queries the relay test result matching it in the relay test result database according to the barcode and outputs the test result through the display module for the experimenter to view. Based on this, data tracking of the relay can be realized through the scanning module.

[0073] In a possible implementation, referring to Figure 3 , the relay testing device may further include: a communication module, and the information input end of the communication module is connected to the test result output end of the microcontroller processor. The communication module at least includes: a serial communication interface or a wifi module.

[0074] The communication module is used to connect with mobile device terminals such as PC, mobile phone, and tablet computer, and send the test results of the relay to remote users. There are three ways for the communication module to communicate with the outside world: serial communication, SWD communication, and WIFI network communication.

[0075] Refer to Figure 4 , a structural schematic diagram of another relay test device provided by an embodiment of the present invention is used to illustrate an optional implementation manner of the relay test device provided by the embodiment of the present invention.

[0076] The relay test device includes: a housing 101, a fixture 102, a touch display screen 103, a scanner 104, a printer 105, and a touch key 106.

[0077] The automatic voltage regulation module, parameter test module, and micro-control processor of the relay test device are integrated inside the housing 101, improving the aesthetics and convenience of the relay test device.

[0078] Ten fixtures 102 with different sizes are provided on the housing 101 for fixing the relay. Each fixture 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. Only when the relay is fixed on the fixture 102, the circuit will be turned on to test the relay.

[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 micro-control processor for displaying the test results.

[0080] The scanner 104 is equivalent to the scanning module described above, and the printer 105 is equivalent to the printing module described above. It can be understood by referring to the above, and will not be elaborated here.

[0081] The touch key 106 is connected to the instruction input terminal of the micro-control processor for sending instructions to start testing and stop testing to the micro-control processor. Optionally, the parameters for separately testing the relay can also be selected through the touch key.

[0082] Based on this, the relay test device proposed by the embodiment of the present invention can simultaneously meet the requirements of convenience, test accuracy rate, high test efficiency, etc.

[0083] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A relay testing device, characterized in that: include: Automatic voltage regulation module, parameter test module, microcontroller processor and display module; The automatic voltage regulation module includes a voltage output terminal; The parameter test module comprises: a test end, a test parameter output end, a constant current source submodule, a digital control power supply submodule and a signal processing submodule, wherein the test end and the test parameter output end are respectively connected to the constant current source submodule, the digital control power supply submodule and the signal processing submodule; The microcontroller comprises: a test parameter input terminal and a test result output terminal; The display module includes a test result input terminal; Wherein, 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 voltage transformation circuit, a feedback circuit, an automatic voltage regulation circuit and a control circuit; The control circuit has a control output end and a feedback receiving end, the control output end is connected to the half-bridge rectifier circuit, the feedback receiving end is respectively connected to the automatic voltage regulating circuit and the feedback circuit, the automatic voltage regulating circuit is connected to the feedback circuit, the transformer circuit is connected between the half-bridge rectifier circuit and the feedback circuit, and the feedback circuit is connected in parallel with the transformer circuit; The voltage output end of the voltage conversion 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 switch tubes, each of which is connected to the control output end of the control circuit.

4. The relay testing device according to claim 2, characterized in that: The feedback circuit includes: a resistor module and a photocoupler connected in series, and the output end of the photocoupler is connected to the feedback receiving end of the microcontroller.

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

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

7. The relay testing device according to claim 6, characterized in that: Also includes: A scanning module, wherein a scanning result output terminal of the scanning module is connected to a scanning result matching terminal of the microcontroller processor.

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 at least includes: a serial communication interface or a wifi module.

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