Circuit board testing device and testing method

Abstract

The invention relates to the field of circuit board function testing, in particular to a circuit board testing device which comprises a power supply unit, a testing unit and a user interaction unit. The tested circuit board is installed on the test unit and is electrically connected to the test unit. The user interaction unit is electrically connected to the test unit. A tester uses the user interaction unit to generate user input and sends the user input to the test unit to generate a test instruction. And the test unit receives the test state from the tested circuit board, generates a test result, and sends the test result to the user interaction unit for display. The power supply unit is used for providing power input. Power input between the tested circuit board and the test unit and power input between the tested circuit board and the user interaction unit are isolated. The invention also comprises a test method. The testing device is convenient and easy to operate, the working efficiency of testing the circuit board is improved, and the reliability of a testing result is improved. According to the operation method, the test state is fed back in real time, the real-time working state of the tested circuit board is conveniently judged, and therefore the test function with high correction rate and high precision is achieved.

Description

Technical Field

[0001] The invention relates to the field of circuit board function testing, in particular to a circuit board testing device and a testing method. Background Art

[0002] The traditional testing process of circuit boards is manually performed by quality inspection technicians, who need to install the machine to test its various functions. After the functions are tested normally, the circuit boards need to be removed and replaced. The overall process is cumbersome, time-consuming and labor-intensive, and there is a high possibility of errors during manual operation. Summary of the invention

[0003] The purpose of the present invention is to provide a circuit board testing device and a testing method, which mainly solve the problems existing in the above-mentioned prior art and realize automatic detection of circuit boards.

[0004] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is to provide a circuit board testing device, characterized in that it comprises a power supply unit, a testing unit and a user interaction unit;

[0005] The circuit board under test is mounted on the test unit and electrically connected to the test unit; the user interaction unit is electrically connected to the test unit; the tester generates user input using the user interaction unit, and generates test instructions to the circuit board under test after sending it to the test unit; the test unit also receives the test status from the circuit board under test, and generates test results, which are sent to the user interaction unit and displayed to the tester; the power supply unit is simultaneously connected to the circuit board under test, the test unit and the user interaction unit, and is used to provide power input; the power input between the circuit board under test and the test unit and the user interaction unit is isolated.

[0006] Furthermore, the power supply unit comprises a first power supply module, a second power supply module, an AC contactor and a transformer-rectifier module. The first power supply module is connected to the circuit board under test through the AC contactor; the second power supply module is connected to the test unit and the user interaction unit through the transformer-rectifier module; the first power supply module and the second power supply module are electrically isolated.

[0007] Furthermore, the power supply unit further includes a first air switch and a second air switch; the first air switch is installed at the input end of the first power module; and the second air switch is installed at the input end of the second power module.

[0008] Furthermore, the first power module takes 380 volts AC as input; the first air switch is a four-pole air switch; the second power module takes 220 volts AC as input; and the second air switch is a two-pole air switch.

[0009] Furthermore, the power supply unit also includes an emergency stop switch; the emergency stop switch is arranged between the AC contactor and the circuit board under test, and is used to quickly disconnect the power supply of the circuit board under test.

[0010] Furthermore, the test unit comprises a switch button, an indicator light and a management module;

[0011] The switch button is used to control the input from the power supply unit and control the power supply of the test unit; the indicator light is connected to the management module and is used to prompt the test status; the management module receives the input from the user interaction unit, generates the test command from the user input, sends it to the circuit board under test, and also reads the test status from the circuit board under test, and forwards it to the user interaction unit while displaying it using the indicator light.

[0012] Further, the user interaction unit comprises a display screen and an input module;

[0013] The display screen is connected to the test unit, receives and displays the test status and the test result from the test unit; the input module obtains the user input of the tester and transmits it to the test unit through serial communication.

[0014] Furthermore, the test unit is connected to the tested circuit board and the user interaction unit via a serial port.

[0015] The present invention also discloses a testing method using the above circuit board testing device, which is characterized by comprising the steps of:

[0016] Step S10, turning on the power supply unit; turning on the switch button on the test unit, the power supply unit supplies power to the test unit and the user interaction unit; after the test unit and the user interaction unit are initialized, the management module in the test unit communicates with the user interaction unit, and the test list is displayed on the user interaction unit;

[0017] Step S20, installing and connecting the circuit board under test to the test unit; the power supply unit supplies power to the circuit board under test;

[0018] Step S30, the tester uses the input module in the user unit to select an item in the test list as the user input and sends it to the test unit;

[0019] Step S40, the testing unit generates the testing instruction according to the user input and sends it to the circuit board under test;

[0020] Step S50, the circuit board under test executes the test instruction; during the execution of the test instruction, the circuit board under test sends the test status to the test unit;

[0021] Step S60, if all test instructions are executed, go to step S70, otherwise go to step S50;

[0022] Step S70, the testing unit generates the test result based on all the received test states, and sends it to the user interaction unit;

[0023] Step S80, the display screen in the user interaction unit displays the test result; the tester determines whether the current tested circuit board is normal according to the test result;

[0024] Step S90, the test of the current circuit board under test is completed, and the process jumps to step S20 to test the new circuit board under test.

[0025] Furthermore, it is characterized in that it also includes checking the test status, and step S50 is replaced by:

[0026] Step S51, the circuit board under test executes the test instruction; during the execution of the test instruction, the circuit board under test sends the test status to the test unit;

[0027] Step S52, the test unit lights up an indicator light according to the test status;

[0028] Step S53, the testing unit sends the received test status to the user interaction unit;

[0029] Step S54: the display screen in the user interaction unit displays the test status.

[0030] In view of the above technical features, a circuit board testing device and a testing method of the present invention have the following significant advantages compared with the prior art:

[0031] 1. The circuit board testing device of the present invention has convenient and simple testing operation, improves the working efficiency of testing circuit boards, and increases the reliability of test results.

[0032] 2. The testing method using the circuit board testing device of the present invention adopts a user interaction unit as a human-computer interaction platform in the testing process, the display interface content is clear and concise, the operation process is simple and convenient, and a high-efficiency and high-precision testing function is achieved.

[0033] 3. The testing method using the circuit board testing device of the present invention uses a user interaction unit to provide real-time feedback on the testing status, thereby facilitating the determination of the real-time working status of the tested circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of a preferred embodiment of the circuit board testing device of the present invention;

[0035] Figure 2 The present invention is a method flow chart of a preferred embodiment of the testing method using the circuit board testing device.

[0036] In the figure: 100-power supply unit, 200-test unit, 300-user interaction unit, 400-tested circuit board;

[0037] 101-first power module, 102-second power module, 103-first air switch, 104-second air switch, 105-AC contactor, 106-transformer rectifier module, 107-emergency stop switch;

[0038] 201-switch button, 202-indicator light, 203-management module;

[0039] 301-display screen, 302-input module. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0041] See also Figure 1 The present invention discloses a circuit board testing device. As shown in the figure, a preferred embodiment thereof is composed of a power supply unit 100, a testing unit 200 and a user interaction unit 300, and is used to test a circuit board 400 under test.

[0042] During the test, the circuit board 400 under test is positioned by a probe, mounted and fixed on the test unit 200, and is electrically connected to the test unit 200. They exchange test information through a serial port. The power supply of the circuit board 400 under test is isolated from the power supply of the test unit 200 and the user unit 300, so the circuit board 400 under test is independently connected to the power supply unit 100 and obtains power supply from the power supply unit 100.

[0043] The test unit 200 is also connected to the power supply unit 100, and obtains power supply from the power supply unit 100. At the same time, it is also electrically connected to the user interaction unit 300 through the serial port, and uses the user interaction unit 300 to obtain the user input of the tester. Specifically, the test unit 200 includes a switch button 201, an indicator light 202 and a management module 203. Among them, the switch button 201 is connected to the power supply unit 100, which controls the power supply of the test unit 200 itself, that is, determines whether the power supply unit 100 can supply power to other parts of the test unit 200. The indicator light 202 is connected to the management module 203 and is controlled by the management module 203. The management module 203 is a core module in the test unit 200, which is generally a microprocessor or a programmable logic array. The management module 203 is equipped with multiple serial communication ports, which are respectively connected to the user interaction unit 300 and the circuit board 400 under test. The management module 203 converts the user input from the user interaction unit 300 into a test command, and then sends it to the circuit board 400 under test through the serial port, and the circuit board 400 under test executes it. During the execution of the test command, the circuit board 400 under test will feedback different test statuses to the management module 203 through the serial port according to different test commands. The management module 203 uses the indicator light 202 to feedback part or all of the test status to the tester on the one hand, and also uses the serial port to send all the test statuses to the user interaction unit 300 for display to the tester on the other hand. When all the test commands are completed, the management module 203 generates the test results in combination with all the test statuses corresponding to the test command, and then sends the test results to the user interaction unit 300 through the serial port for display to the tester.

[0044] The user interaction unit 300 includes a display screen 301 and an input module 302. The display screen 301 is an output module, which is connected to the management module 203 in the test unit 300 through a serial port and is responsible for displaying the test status and test results to the tester. The input module 302 is used to obtain the user input of the tester and then transmit it to the management module 203 through serial port communication. In other embodiments, a single device with input function can also be used to replace the display screen 301 and the input module 302, such as a touch screen with serial port communication.

[0045] In this embodiment, the power supply unit 100 includes a first power supply module 101, a second power supply module 102, a first air switch 103, a second air switch 104, an AC contactor 105, a transformer rectifier module 106 and an emergency stop switch 107. The first power supply module 101 and the second power supply module 102 are electrically isolated.

[0046] The first power module 101 provides a voltage output of 380 volts, which is connected to an external 380 volt three-phase alternating current. Between the first power module 101 and the external three-phase alternating current, a four-pole air switch is installed as the first air switch 103. The first air switch 103 will automatically cut off the connection with the external three-phase alternating current when the first power module 101 is abnormal. The output of the first power module 101 is connected to the circuit board 400 under test through the AC contactor 105 and the emergency stop switch 107 in turn, and the circuit board 400 under test is powered. When an abnormality occurs during the test, as long as the emergency stop switch 107 is actuated, the power supply to the circuit board 400 under test will be quickly cut off to ensure safety.

[0047] The second power supply module 102 provides a voltage output of 220 volts, which is connected to an external 220 volt single-phase alternating current. Between the second power supply module 102 and the external single-phase alternating current, a bipolar air switch is installed as a second air switch 104. The second air switch 104 will automatically cut off the connection with the external single-phase alternating current when the second power supply module 102 is abnormal. The second power supply module 102 is connected to the transformer and rectifier module 106 as the input of the transformer and rectifier module 106. The transformer and rectifier module 106 transforms the 220V alternating current into 12V direct current as the power supply of the test unit 200 and the user interaction unit 300.

[0048] See also Figure 2 The present invention also provides a testing method using the above-mentioned circuit board testing device, a preferred embodiment of which comprises the steps of:

[0049] Step S100, device initialization.

[0050] Start the power supply unit, and then turn on the switch button on the test unit. The power supply unit starts to supply power to the test unit and the user interaction unit. The display screen and the input module in the user interaction unit also complete the power-on self-test. After the management module (microprocessor) in the test unit completes the power-on self-test, it communicates with the display screen and the input module using the serial port module. After the self-test communication is normal, the management module sends the test list information to the display screen and displays it to the tester through the display screen.

[0051] Step S200, installing the circuit board to be tested.

[0052] The circuit board under test is positioned and fixed on the test unit through the probe, and then the electrical connection with the test unit is completed, that is, the circuit board under test is connected to the management module through the serial communication line. Then, the switch on the circuit board under test is operated, and the power supply unit is used to supply power to the circuit board under test.

[0053] Step S300, selecting a test item.

[0054] The tester uses the input module to select an item from the test list displayed on the display screen, which is then sent to the test unit in the form of user input and processed by the management module.

[0055] Step S400: Generate a test instruction.

[0056] The management module reads the user input from the input module through the serial port, combines it with the test list, generates corresponding test instructions, and sends them to the circuit board under test through the serial port.

[0057] Step S501, execute test instructions

[0058] The circuit board under test executes the test instruction. During the execution of the test instruction, the circuit board under test sends the test status to the test unit through the serial port. In particular, the content of the test status sending frequency corresponding to different test instructions will be different.

[0059] Step S502: the test unit lights up the indicator light according to the test status.

[0060] After the management module reads the test status, it lights up different indicators according to the test status. For example, a green indicator light indicates that the test status is as expected so far, a red indicator light indicates that the test status is not as expected, and so on. The test progress can also be displayed according to the number of indicators that are lit.

[0061] Step S503: Send the test status to the user interaction unit.

[0062] Because the indicator light can indicate a limited number of test states, generally only the most critical content can be displayed. Therefore, the management module will send all received test states to the user interaction unit through the serial port.

[0063] Step S504: the display screen displays the test status.

[0064] The user interaction unit uses a display screen to display the received test status for the tester to review.

[0065] Step S600: If all the test instructions are executed, go to step S700; otherwise, go to step S501 and continue to execute.

[0066] Step S700, generating test results.

[0067] The management module in the test unit generates a test result based on all the test states corresponding to the test instruction received previously, and sends the result to the user interaction unit through the serial port.

[0068] Step S800, determining whether the circuit board under test is normal.

[0069] The user interaction unit uses a display screen to display the received test results. After reading the test results, the tester manually determines whether the current circuit board under test is normal.

[0070] Step S900, the test of the current circuit board under test is completed, and the process jumps to step S200 to test the next circuit board under test.

[0071] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A circuit board testing device, characterized in that: It includes a power supply unit, a test unit and a user interaction unit; The circuit board under test is mounted on the test unit and electrically connected to the test unit; the user interaction unit is electrically connected to the test unit; The tester generates user input using the user interaction unit, and generates test instructions to the circuit board under test after sending it to the test unit; the test unit also receives the test status from the circuit board under test and generates test results, which are sent to the user interaction unit and displayed to the tester; the power supply unit is simultaneously connected to the circuit board under test, the test unit and the user interaction unit to provide power input; the power input between the circuit board under test and the test unit and the user interaction unit is isolated.

2. The circuit board testing device according to claim 1, characterized in that: The power supply unit comprises a first power supply module, a second power supply module, an AC contactor and a transformer-rectifier module. The first power supply module is connected to the circuit board under test through the AC contactor; the second power supply module is connected to the test unit and the user interaction unit through the transformer-rectifier module; the first power supply module and the second power supply module are electrically isolated.

3. The circuit board testing device according to claim 2, characterized in that: The power supply unit further includes a first air switch and a second air switch; the first air switch is installed at the input end of the first power module; the second air switch is installed at the input end of the second power module.

4. The circuit board testing device according to claim 3, characterized in that: The first power module takes 380 volts AC as input; the first air switch is a four-pole air switch; the second power module takes 220 volts AC as input; the second air switch is a two-pole air switch.

5. The circuit board testing device according to claim 2, characterized in that: The power supply unit further comprises an emergency stop switch; the emergency stop switch is arranged between the AC contactor and the circuit board under test, and is used for quickly disconnecting the power supply of the circuit board under test.

6. The circuit board testing device according to claim 1, characterized in that: The test unit includes a switch button, an indicator light, and a management module; The switch button is used to control the input from the power supply unit and control the power supply of the test unit; the indicator light is connected to the management module and is used to prompt the test status; the management module receives the input from the user interaction unit, generates the test command from the user input, sends it to the circuit board under test, and also reads the test status from the circuit board under test, and forwards it to the user interaction unit while displaying it using the indicator light.

7. The circuit board testing device according to claim 1, characterized in that: The user interaction unit comprises a display screen and an input module; The display screen is connected to the test unit, receives and displays the test status and the test result from the test unit; the input module obtains the user input of the tester and transmits it to the test unit through serial communication.

8. The circuit board testing device according to claim 1, characterized in that: The testing unit is connected to the tested circuit board and the user interaction unit through a serial port.

9. A testing method using the circuit board testing device according to claim 1, characterized in that: Contains steps: Step S10, turning on the power supply unit; turning on the switch button on the test unit, the power supply unit supplies power to the test unit and the user interaction unit; after the test unit and the user interaction unit are initialized, the management module in the test unit communicates with the user interaction unit, and the test list is displayed on the user interaction unit; Step S20, installing and connecting the circuit board under test to the test unit; the power supply unit supplies power to the circuit board under test; Step S30, the tester uses the input module in the user unit to select an item in the test list as the user input and sends it to the test unit; Step S40, the testing unit generates the testing instruction according to the user input and sends it to the circuit board under test; Step S50, the circuit board under test executes the test instruction; during the execution of the test instruction, the circuit board under test sends the test status to the test unit; Step S60, if all test instructions are executed, go to step S70, otherwise go to step S50; Step S70, the testing unit generates the test result based on all the received test states, and sends it to the user interaction unit; Step S80, the display screen in the user interaction unit displays the test result; The tester determines whether the circuit board under test is normal according to the test result; Step S90, the test of the current circuit board under test is completed, and the process jumps to step S20 to test the new circuit board under test.

10. The testing method using the circuit board testing device according to claim 9, characterized in that: The test status is also checked, and step S50 is replaced by: Step S51, the circuit board under test executes the test instruction; during the execution of the test instruction, the circuit board under test sends the test status to the test unit; Step S52, the test unit lights up an indicator light according to the test status; Step S53, the testing unit sends the received test status to the user interaction unit; Step S54: the display screen in the user interaction unit displays the test status.

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