Control panel test equipment, test method and application thereof

Abstract

The invention discloses a control panel test device which comprises a control box and a test board. The control box internally comprises a program-controlled universal meter and a control processor; the test bench comprises an electrical performance acquisition assembly, a first image acquisition assembly, a volume collector, a burner and a circuit board clamp. The circuit board clamp is used for clamping and fixing the to-be-tested control board; the distribution positions of probes in the electrical performance acquisition assembly correspond to test points in the to-be-tested control panel, and the electrical performance acquisition assembly is electrically connected with the program-controlled universal meter; the first image acquisition assembly is arranged above the circuit board clamp and is used for acquiring an image of the to-be-tested control board; the volume collector is arranged on one side of the circuit board clamp and collects the volume of the buzzer on the control board to be tested. The burner is arranged on one side of the circuit board clamp, and the burning end of the burner can be in butt joint with a burning port in the control board to be tested. According to the invention, the functions of the electronic devices can be automatically tested, and the test efficiency and the test accuracy can be improved at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of control panel testing equipment, and in particular to a control panel testing equipment, a testing method and applications thereof. Background Art

[0002] In the circuit function test process of existing electronic equipment, most manufacturers will only test the circuit performance through the control panel test equipment, and the functions and quality of other electronic devices on the circuit, such as: LED and buzzer, are basically tested manually. When manually testing the color of LED, the volume of buzzer and the bad pixels of the external display screen, there are the following defects: 1. Manual test fatigue will occur. When there are a large number of LEDs in the circuit that change color when working, manual testing is prone to omissions and the test speed is slow; 2. There will be inconsistency in test standards. Manual testing is prone to ignore or fail to identify the brightness and color difference of LEDs, especially the test of buzzer volume is also prone to different judgment standards.

[0003] At the same time, when testing most electronic devices, the test program will be burned first, and then the shipping program will be burned after the test is completed. It is easy to confuse the two burning programs during manual burning, resulting in test errors, and in serious cases, quality problems in the shipped products. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a control board testing device, a testing method and an application thereof, so as to solve the technical problems in the prior art that the functions and quality of other electronic devices in the circuit need to be tested manually, the manual testing is inefficient and has poor results, and the manual burning program is prone to errors.

[0005] The present invention provides a control panel testing device, comprising: a control box and a test bench; the test bench is arranged on the control box; The control box includes: a program-controlled multimeter and a control processor, and the program-controlled multimeter is electrically connected to the control processor; The test bench comprises: an electrical performance acquisition component, a first image acquisition component, a volume collector, a burner, and a circuit board fixture; the circuit board fixture clamps and fixes the control board to be tested; the distribution position of the probes in the electrical performance acquisition component corresponds to the test points in the control board to be tested placed on the circuit board fixture, and the electrical performance acquisition component is electrically connected to the programmable multimeter; the first image acquisition component is arranged above the circuit board fixture, the image acquisition field of view covers the control board to be tested, and the image of the control board to be tested is collected; the volume collector is arranged on one side of the circuit board fixture, and the volume of the buzzer on the control board to be tested is collected; the burner is arranged on one side of the circuit board fixture, and the burning end of the burner can be connected to the burning port on the control board to be tested; the first image acquisition component, the volume collector and the burner are electrically connected to the control processor.

[0006] Furthermore, the test bench also includes: an LCD display screen and a second image acquisition component; the LCD display screen is electrically connected to the control processor and is used to display test and burning information; the second image acquisition component faces the LCD display screen and acquires an image of the LCD display screen, and the second image acquisition component is electrically connected to the control processor.

[0007] Furthermore, the first image acquisition component and the second image acquisition device both include: a camera and a camera fixing bracket.

[0008] Furthermore, the control box also includes: an ESD detector; the ESD detector is connected to the anti-static wristband and is used to detect whether the tester wears the anti-static wristband properly.

[0009] Furthermore, the test bench also includes: a fill light sheet; the fill light sheet is arranged between the circuit board fixture and the first image acquisition component.

[0010] Furthermore, the probes in the electrical performance acquisition component include: test probes and burning probes; the distribution positions of the test probes correspond to the test points in the control board to be tested placed on the circuit board fixture; the distribution positions of the burning probes correspond to the pin positions of the burning port socket in the control board to be tested, the burning probes on the same side are staggered, and the needle tails of the burning probes are connected to the burning ends of the burner.

[0011] Furthermore, the diameter of the burning probe ranges from 40 microns to 60 microns.

[0012] Furthermore, the test bench also includes: a barcode scanner; the barcode scanner is arranged above the circuit board fixture to scan and collect the barcode of the control board to be tested.

[0013] The present invention also provides a test method for a control panel test device, comprising the following steps: Step 1: Set the position and corresponding color of the LED in the simulated image of the control board to be tested in the control processor; Step 2: Place the control board to be tested on the circuit board fixture, burn the test program through the burner, and scan the barcode of the control board to be tested; Step 3: Control the probes in the electrical performance acquisition component to contact the corresponding test points on the control board to be tested, and perform an electrical performance test process on the control board to be tested; Step 4: The circuit board image of the control board to be tested is collected by the first image acquisition component, and the circuit board image is processed to obtain the position of each LED in the circuit board image and its corresponding color information. The control processor determines whether the color of the LED at the corresponding position is normal according to the simulated image of the control board to be tested; Step 5: Adjust the volume of the buzzer of the control board to be tested, collect the sound through the volume collector, and determine whether it is normal through the control processor; Step 6: When the test is normal, the factory program is burned through the burner, and the test information of the current control board to be tested is stored according to the barcode information, and the test of the current control board to be tested is completed.

[0014] Furthermore, in the test method of the control panel test equipment, Between step 2 and step 3 and in step 6, it also includes: after the burning program, collecting the LCD display screen image through the second image acquisition component, processing the LCD display screen image, obtaining the burning version number displayed in the LCD display screen image, and judging whether the burning version is correct.

[0015] Furthermore, in step 4, the circuit board image is processed by using a NI VISION visual preprocessing algorithm.

[0016] Furthermore, when performing image processing on the LCD display screen image, the LCD display screen image is firstly grayed out, and then the text in the LCD display screen image is obtained through a text recognition algorithm.

[0017] Furthermore, the step 1 also includes: detecting the state of the tester wearing the anti-static wristband through an ESD detector. When the ESD detector detects that the wristband is not worn or has poor contact, the device does not perform subsequent testing processes; when the ESD detector detects that the wristband is qualified, the device continues the subsequent testing process.

[0018] The present invention also provides an application of a control panel testing device and a testing method thereof, which are applied to test a control panel of a combustible gas testing controller.

[0019] Beneficial effects of the present invention: The present invention realizes automatic testing of the functions of various electronic devices in the process of testing the electrical performance of the control board of the electronic device, thereby avoiding the problems of missed detection, wrong detection and inconsistent inspection standards that are easy to occur during manual testing, and can improve the test efficiency and test accuracy at the same time. At the same time, the present invention can monitor the burning program and improve the accuracy of program burning. The present invention stores the batches of the control board to be tested and the test results in correspondence through scanning codes, providing traceability of product quality. The setting of the size and distribution of the burning probe of the present invention can effectively avoid the situation that the burning probe is not inserted into place and the needle is easily bent when inserted into the burning port socket, which is often caused by the position deviation of the burning port socket during welding, and greatly improves the durability of the burning probe and the burning success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present invention in any way. In the accompanying drawings: Figure 1 It is a front view of a specific embodiment of the present invention; Figure 2 is a front view of a cross-section of a test bench in a specific embodiment of the present invention; Figure 3 is a side view of a test bench in section in a specific embodiment of the present invention; Figure 4 is a schematic diagram of the distribution of probes in a specific embodiment of the present invention; Figure 5 It is a schematic diagram of the distribution of the burning probe and the burning port socket in a specific embodiment of the present invention; Figure 6 yes Figure 4 The enlarged schematic diagram of point A in the middle; Figure 7 It is an overall three-dimensional color schematic diagram of a specific embodiment of the present invention; Figure 8 It is a three-dimensional color schematic diagram of a test bench according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0022] The present invention is further illustrated below in conjunction with specific embodiments. Those skilled in the art should understand that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention, and modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of this application.

[0023] like Figure 1-8 As shown, the present invention provides a control panel test device, comprising: a control box 1, a test bench 2; the test bench is arranged on the control box; The control box 1 includes: a control box 11, a test hardware programmable power supply 12, RS232 and RS485 communication modules, a programmable multimeter 13, a control processor 14, a display 15 and an ESD detector; the test hardware programmable power supply 12, RS232 and RS485 communication modules, the programmable multimeter 13, and the control processor 14 are all arranged in the control box 11; the display 15 is arranged on the top of the control box 11, and is used to display various relevant data of the test process; the test hardware programmable power supply 12 supplies power to various electrical equipment, the RS232 and RS485 communication modules, the programmable multimeter 13 are electrically connected to the control processor 14, and the RS232 and RS485 communication modules are used for data interaction between the test equipment and other external devices; the programmable multimeter 13 is used to test the electrical performance of the control board to be tested; static electricity will affect the test process, and the tester needs to wear an anti-static wristband, and the ESD detector is used to detect the wearing status of the tester's anti-static wristband to ensure that the product is produced in an effective ESD environment.

[0024] The test bench 2 includes: a test box 21, a shell 22, an electrical performance acquisition component, a first image acquisition component 24, a second image acquisition component 25, a volume collector 26, a burner, a circuit board fixture 27, a fill light, an LCD display screen 29, and a barcode scanner; The test box 21 contains electronic devices used by various components on the test bench 2, such as: PLC controller, burner controller, driver, LCD display, etc.; The shell cover 22 is arranged above the test box 21, covering the circuit board fixture and the electrical performance collection component. The shell cover 22 is made of dark material to avoid the interference of ambient light on the LED test; The circuit board fixture 27 clamps and fixes the control board 3 to be tested. Corresponding grooves and bosses are provided on the circuit board fixture 27 according to the device distribution of the control board 3 to be tested. The purpose is to enable the control board 3 to be tested to be placed horizontally on the circuit board fixture 27 and supported. The circuit board fixture 27 can be replaced according to the model of the control board 3 to be tested, and mainly plays the role of supporting and fixing the position of the control board 3 to be tested; the circuit board fixture 27 is also provided with a docking connector, and the test points on the back of the control board 3 to be tested can be connected to the docking connector through probes and wires, so that the upper probe can indirectly contact the test points on the back of the control board 3 to be tested.

[0025] The electrical performance acquisition assembly includes: a probe 231, a probe support rod 232, a probe support plate 233 and a driving device; the four corners of the probe support plate 233 are horizontally supported above the control board 3 to be tested by the probe support rod 232; there are several probes 231, and the probes 231 are vertically placed on the probe support plate 233 toward the control board 3 to be tested, such as Figure 4-6As shown, the probe 231 includes: a test probe 2311 and a burning probe 2312. The distribution position of the test probe 2311 corresponds to the test point in the control board 3 to be tested placed on the circuit board fixture 27 and the docking joint on the circuit board fixture 27. The test probe 2311 is electrically connected to the programmable multimeter 13. During the electrical performance test, the driving device will drive the probe support rod 232 to drive the probe support plate 233 to move toward the control board 3 to be tested until the test probe 2311 contacts the test point and the docking joint. The programmable multimeter 13 will perform an electrical performance test on the control board 3 to be tested through the probe 231 according to the test program; the diameter range of the burning probe 2312 can be: between 40 microns and 60 microns, which is much smaller than the existing burning probe. The distribution position of needle 2312 corresponds to the pin position of the burning port socket strip in the control board to be tested. The staggered setting of the burning probes on the same side can avoid mutual influence between adjacent burning probes. The needle tail of the burning probe 2312 is connected to the burning end of the burner. During burning, the burning probe 2312 will contact the welding pin of the burning port socket strip instead of being inserted into the socket of the socket strip, which can effectively avoid inaccurate insertion caused by the offset of the socket position and the situation that the probe is easy to bend when inserted into the socket. The fault tolerance rate of contact with the pin is higher than that of insertion into the socket; the probe support plate 233 can be used as a fill light sheet, and a transparent material is selected. When the LED lamp bead is a glass body and not a SMD lamp, the light is scattered and the light aggregation is weak, so a fill light sheet for LED fill light is added to the tooling to improve the light scattering phenomenon.

[0026] The first image acquisition component 24 includes: a camera and a camera bracket; a through hole is provided at the center of the top of the housing, and the camera passes through the through hole and faces the circuit board fixture below, and is fixed to the top of the housing by the camera bracket; the image acquisition field of the camera covers the control board to be tested, and the image of the control board to be tested is collected and output to the control processor; The second image acquisition component 25 includes: a camera and a camera bracket; the camera is fixed in the test box through the camera bracket, the camera faces the LCD display screen 29, and the image of the LCD display screen 29 is collected and output to the control processor, and the LCD display screen 29 is electrically connected to the control processor for displaying test and burning information; The cameras in the first image acquisition component 24 and the second image acquisition component 25 are preferably industrial cameras MV-UB500, and the specific parameters are: 5 million pixels; 1 / 2.5" target size; 2592x1944 resolution; 8fps maximum frame rate; the specific parameters of the lens MV-LD-4-4M-G are: 4 million pixels; F = 1:2.0~0 aperture; target size: 1 / 1.8"; focal length: 4 mm; distortion: <0.5%.

[0027] The volume collector 26 is arranged on the probe support plate 233 to collect the volume of the buzzer on the control board to be tested and output it to the control processor; the burner is arranged on one side of the circuit board fixture 27, and the burning end of the burner can be connected to the burning port on the control board to be tested.

[0028] The barcode scanner is arranged above the circuit board fixture 27 to scan and collect the barcode of the control board to be tested. The information reflected by the barcode may include: the model, batch, number, etc. of the control board to be tested, which is used for corresponding storage of subsequent test results.

[0029] The screenshot embodiment of the present invention also provides a test method for a control panel test device. Taking the test of the circuit board of the combustible gas test controller as an example, the test of the circuit board of the combustible gas test controller includes: testing of various voltages and currents of the analog circuit, testing of the volume of two buzzers, 4~20mA function test, 70 LED color test, 9 channel key0~key8 status test, SRAM&EEPROM&RTC test, PowerStatus and Fire signal function test, battery power test, wherein 6 of the 70 LEDs include three-color lights that light up different colors in different states, and the specific steps are as follows: Step A1: The test system will intercept the high and low electrical frequencies generated by the ESD detector from the ESD detector. According to the high and low electrical frequencies intercepted from the ESD detector, the tester will detect the state of the anti-static wristband. When the ESD detector detects that the wristband is not worn or the contact is poor, the equipment will not carry out the subsequent test process; when the ESD detector detects that the wristband is qualified, the equipment will continue the subsequent test process; Step A2: setting the position and corresponding color of the LED in the simulated image of the control board to be tested in the control processor, and using RGB to represent the color; Step A3: Place the control board to be tested on the circuit board fixture, burn the test program through the burner, and scan the barcode of the control board to be tested; Step A4: acquiring an LCD display screen image through the second image acquisition component, subjecting the LCD display screen image to image processing, obtaining a burned version number displayed in the LCD display screen image, and determining whether the burned version is a test version; Step A5: Control the probes in the electrical performance acquisition component to contact the corresponding test points on the control board to be tested, and perform the electrical performance test process of the control board to be tested, wherein the electrical performance test process includes: various voltage and current tests, 4~20mA function test, 9 channels key0~key8 status test, SRAM&EEPROM&RTC test, PowerStatus and Fire signal function test, and battery power test; Step A6: The camera in the first image acquisition component is used to acquire a color BMP format image of the circuit board of the control board to be tested. The image contains color information of three channels: R, G, and B. The circuit board image is processed by the NI VISION visual preprocessing algorithm to extract the three color images respectively, and the position of each LED in the circuit board image and its corresponding color information are obtained. The control processor determines whether the color and light intensity of the LED at the corresponding position are normal according to the simulated image of the control board to be tested. Step A7: Adjust the volume of the two buzzers of the control board to be tested, collect the sound through the volume collector, and determine whether it is normal through the control processor; Step A8: When the test is normal, the factory program is burned by the burner. After the program is burned, the LCD display screen image is captured by the second image acquisition component, the LCD display screen image is processed, the burned version number displayed in the LCD display screen image is obtained, and it is determined whether the burned version is correct; Step A9: storing the test information of the current control board to be tested according to the barcode information, and completing the test of the current control board to be tested.

[0030] When the LCD display screen image is processed in step A4 and step A8, the LCD display screen image is firstly grayed out, and then the text in the LCD display screen image is obtained by a text recognition algorithm.

[0031] By using the test equipment and the test method provided by the present invention, the test steps are all collected, judged and analyzed by the program automatically, without the need for human judgment, and the output has been increased from the original 12pcs / H to the current 35pcs / H.

[0032] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A control panel testing device, characterized in that: include: Control box, test bench; The test bench is set on the control box; The control box includes: a program-controlled multimeter and a control processor, and the program-controlled multimeter is electrically connected to the control processor; The test bench comprises: an electrical performance acquisition component, a first image acquisition component, a volume collector, a burner, and a circuit board fixture; the circuit board fixture clamps and fixes the control board to be tested; the distribution position of the probes in the electrical performance acquisition component corresponds to the test points in the control board to be tested placed on the circuit board fixture, and the electrical performance acquisition component is electrically connected to the programmable multimeter; the first image acquisition component is arranged above the circuit board fixture, the image acquisition field of view covers the control board to be tested, and the image of the control board to be tested is collected; the volume collector is arranged on one side of the circuit board fixture, and the volume of the buzzer on the control board to be tested is collected; the burner is arranged on one side of the circuit board fixture, and the burning end of the burner can be connected to the burning port on the control board to be tested; the first image acquisition component, the volume collector and the burner are electrically connected to the control processor.

2. The control board testing device according to claim 1, characterized in that: The test bench also includes: an LCD display screen and a second image acquisition component; the LCD display screen is electrically connected to the control processor and is used to display test and burning information; the second image acquisition component faces the LCD display screen and acquires an image of the LCD display screen, and the second image acquisition component is electrically connected to the control processor.

3. The control board testing device according to claim 1, characterized in that: The control box also includes: an ESD detector; the ESD detector is connected to the anti-static wristband to detect whether the tester wears the anti-static wristband properly; the test bench also includes: a fill light and a barcode scanner; the fill light is arranged between the circuit board fixture and the first image acquisition component; the barcode scanner is arranged above the circuit board fixture to scan and collect the barcode of the control board to be tested.

4. The control board testing device according to claim 1, characterized in that: The probes in the electrical performance acquisition component include: test probes and burning probes; the distribution positions of the test probes correspond to the test points in the control board to be tested placed on the circuit board fixture; the distribution positions of the burning probes correspond to the pin positions of the burning port socket in the control board to be tested, the burning probes on the same side are staggered, and the needle tails of the burning probes are connected to the burning ends of the burner.

5. The control board testing device according to claim 4, characterized in that: The diameter of the burning probe ranges from 40 microns to 60 microns.

6. A test method for a control panel test device, applicable to the control panel test device as claimed in any one of claims 1 to 5, characterized in that: The steps include: Step 1: Set the position and corresponding color of the LED in the simulated image of the control board to be tested in the control processor; Step 2: Place the control board to be tested on the circuit board fixture, burn the test program through the burner, and scan the barcode of the control board to be tested; Step 3: Control the probes in the electrical performance acquisition component to contact the corresponding test points on the control board to be tested, and perform an electrical performance test process on the control board to be tested; Step 4: The circuit board image of the control board to be tested is collected by the first image acquisition component, and the circuit board image is processed to obtain the position of each LED in the circuit board image and its corresponding color information. The control processor determines whether the color of the LED at the corresponding position is normal according to the simulated image of the control board to be tested; Step 5: Adjust the volume of the buzzer of the control board to be tested, collect the sound through the volume collector, and determine whether it is normal through the control processor; Step 6: When the test is normal, the factory program is burned through the burner, and the test information of the current control board to be tested is stored according to the barcode information, and the test of the current control board to be tested is completed.

7. The test method of the control panel test equipment according to claim 6, characterized in that: Between step 2 and step 3 and in step 6, it also includes: after the burning program, collecting the LCD display screen image through the second image acquisition component, processing the LCD display screen image, obtaining the burning version number displayed in the LCD display screen image, and judging whether the burning version is correct.

8. The test method of the control panel test equipment according to claim 7, characterized in that: In the step 4, the circuit board image is processed by the NIVISION visual preprocessing algorithm; when the LCD display screen image is processed, the LCD display screen image is first grayed out, and then the text in the LCD display screen image is obtained by the text recognition algorithm.

9. The test method of the control panel test equipment according to claim 7, characterized in that: The step 1 also includes: detecting the state of the tester wearing the anti-static wristband through an ESD detector. When the ESD detector detects that the tester is not wearing the wristband or the contact is poor, the device does not perform subsequent testing processes; when the ESD detector detects that the tester is qualified, the device continues the subsequent testing process.

10. An application of the control board testing device as claimed in any one of claims 1 to 5, characterized in that: The control panel testing device is used to test the control panel of a combustible gas test controller.

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