Intelligent main control board detection device and method

Abstract

The invention discloses an intelligent main control board detection device and method, and the device comprises a recognition module, an operation module, a detection tool, a detection module, a control module and a display module, and the recognition module is used for transmitting a signal after recognizing that a PCB reaches a to-be-detected region; the operation module comprises a mechanical arm which is provided with a vacuum chuck and a label pasting mechanism; the detection jig is provided with a probe array and is matched with PCB test points; the detection module is connected with the PCB through a probe and executes short circuit detection and power-on function test; the control module coordinates all the modules; the display module has CAN communication, display screen and network uploading functions; wherein after receiving a signal of the identification module, the control module controls the operation module to transfer the PCB to the detection jig; then the detection module is triggered to perform short-circuit detection and then perform power-on function test; and finally, the operation module is controlled to label and sort according to a test result. According to the invention, a full-automatic transmission, identification, testing and sorting assembly line is constructed, the detection efficiency is greatly improved, and the misjudgment rate and the equipment damage rate are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of main control board detection, and in particular to an intelligent main control board detection device and method. Background Art

[0002] There are three major pain points in the main control board testing of current automotive driving simulation equipment: Manual inspection is inefficient: The traditional inspection method involves manual visual inspection combined with multimeter measurement. Single-board inspection takes more than 5 minutes and has a high misjudgment rate.

[0003] Short circuit risk out of control: Direct power-on testing of PCBs without pre-screening for short circuits can easily lead to problems such as burning out of main control boards in batches.

[0004] Serious data silos: Test results rely on paper records and cannot be linked to the MES system, making it time-consuming to trace the source of faulty boards. Summary of the Invention

[0005] To solve the above problems, this application provides an intelligent main control board detection device and method, which builds a fully automatic transmission, identification, testing, and sorting pipeline, greatly improves detection efficiency, and reduces the error rate and equipment damage rate. The technical solution is as follows: The first aspect of the present application provides an intelligent main control board detection device, including an identification module, an operation module, a detection fixture, a detection module, a control module and a display module. The identification module includes a camera, and the identification module is used to identify the PCB to the test area and then send a GPIO signal; the operation module includes a 485 communication robot arm, and the operation module has a vacuum suction cup and a label pasting mechanism; the detection fixture has a probe array, which matches the PCB test points; the detection module connects to the PCB through the probe to perform short circuit detection and power-on function test; the control module integrates 485 / USART / CAN / GPIO interfaces to coordinate various modules; the display module has CAN communication, display screen and network upload functions; wherein, after receiving the identification module signal, the control module controls the operation module to move the PCB to the detection fixture; then triggers the detection module to first perform short circuit detection, and then perform power-on function test; finally, the operation module is controlled to label and sort according to the test results.

[0006] For example, in the intelligent main control board detection device provided in one embodiment, the probe array of the detection fixture is replaceable, and different probe boards are adapted to different PCB test point layouts.

[0007] For example, in the intelligent main control board detection device provided in one embodiment, the robotic arm of the operating module includes a vacuum suction cup, a rotating label head and a position feedback encoder. The adsorption area of ​​the vacuum suction cup covers the PCB size, and the rotating label head stores qualified / unqualified label rolls.

[0008] For example, in the intelligent main control board detection device provided in one embodiment, the detection module performs hierarchical detection, including the following steps: (1) short circuit detection stage: disconnect the power supply, measure the impedance between the test points, and determine a short circuit if it is less than 10Ω; (2) functional test stage: power on only when there is no short circuit, and verify the communication protocol and GPIO level.

[0009] For example, in the intelligent main control board detection device provided in one embodiment, the camera resolution of the recognition module is ≥2 million pixels, and the recognition algorithm includes PCB contour matching and positioning hole recognition.

[0010] For example, in the intelligent main control board detection device provided in one embodiment, the control module adopts a priority interrupt mechanism: short circuit alarm has the highest priority, and the detection result is transmitted through USART.

[0011] For example, in the intelligent main control board detection device provided in one embodiment, the display module performs operations including: locally storing the number of qualified / defective products, automatically uploading the detection results to the server, and displaying the current detection status in real time.

[0012] For example, the intelligent main control board detection device provided in one embodiment also includes an audible and visual alarm unit, which triggers a red flashing light and a long buzzer when a short circuit occurs; and triggers a yellow slow flashing light when a functional failure occurs.

[0013] The second aspect of the present application provides a PCB intelligent detection method, comprising the following steps: Step 1: a transmission mechanism feeds the PCB, and an identification module visually locates the PCB; Step 2: a robotic arm moves the PCB to a detection fixture, and a probe contacts a test point; Step 3: layer detection: first an offline short-circuit test, then power-on functional verification; Step 4: controlling the robotic arm to attach qualified / unqualified labels and sort them; Step 5: the display module updates the data and uploads it to the cloud.

[0014] The beneficial effects brought about by an intelligent main control board detection device and method provided in some embodiments of the present application are: greatly improving the detection efficiency through fully automatic transmission, identification, testing, and sorting lines, reducing the misjudgment rate through visual positioning and precise probe contact, and reducing the equipment damage rate through a layered detection mechanism; and achieving full-process data traceability, reducing the time for tracing faulty boards; and adaptive multi-board type detection through a replaceable probe array. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 Figure 1 is a schematic diagram of an intelligent master control board detection device according to the present application; Figure 2 Figure 2 is a flowchart of a PCB intelligent detection method according to the present application. DETAILED DESCRIPTION

[0017] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined inventive purpose, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0018] The first aspect of the present application provides an intelligent master control board detection device, as shown in Figure 1, which comprises a recognition module, an operation module, a detection fixture (i.e. a test fixture), a detection module, a control module (i.e. the operation module) and a display module. Figure 1

[0019] The recognition module is built-in with a camera, and the recognition module is used to identify the sending of a GPIO signal after the PCB is placed in the detection area; specifically, the program controls the recognition of a specified item, and a GPIO signal communication is sent; The operation module comprises a 485 communication mechanical arm, and the operation module has a vacuum chuck and a label sticking mechanism, which moves the PCB through the self-provided chuck structure and can stick the desired label paper; The detection fixture has a probe array that matches the PCB test points, specifically a probe clamp corresponding to the test points on the PCB, which establishes a connection between the PCB and the detection circuit through the probe; The detection module connects the PCB through the probe, performs short circuit detection and power-on function test; has short circuit, communication, GPIO and other detection functions, and is connected with the probe on the detection fixture through the corresponding interface and communicates with the control module through the USART mode; The control module integrates 485 / USART / CAN / GPIO interfaces, coordinates various modules, and can receive and process information sent by other modules; The display module has CAN communication, a 7-inch display screen and network uploading function; specifically, it communicates with the control module through CAN, has a 7-inch display screen (with built-in display software) and a network interface, can automatically display and save the current detection of qualified and defective products, and the detection results of the corresponding board card in the local, and automatically uploads the data to the server through the network for saving; The control module receives the signal of the recognition module, controls the operation module to transfer the PCB to the detection fixture, triggers the detection module to perform short circuit detection first and then power-on function test, and finally controls the operation module to paste the label and sort according to the test results.

[0020] ​According to the above embodiments, this application realizes an industrial-grade automated sorting process by constructing a fully automatic transmission, identification, testing, and sorting pipeline, greatly improving detection efficiency, reducing the misjudgment rate through visual positioning and precise probe contact, and intercepting 100% of short-circuited PCBs before power-on through a layered detection mechanism, reducing the equipment damage rate to zero and significantly reducing labor costs.

[0021] For example, in the intelligent main control board detection device provided in one embodiment, the probe array of the detection fixture is replaceable, and different probe boards are adapted to different PCB test point layouts.

[0022] According to the above embodiment, the replaceable probe array supports fast switching of 12 types of main control boards and adaptive multi-board type detection.

[0023] For example, in the intelligent main control board detection device provided in one embodiment, the robotic arm of the operating module includes a vacuum suction cup, a rotating label head and a position feedback encoder. The adsorption area of ​​the vacuum suction cup covers the PCB size, and the rotating label head stores qualified / unqualified label rolls. The positioning accuracy can reach ±0.1mm through the position feedback encoder.

[0024] For example, in the intelligent main control board detection device provided in one embodiment, the detection module performs layered detection, first checking whether the PCB to be tested has a short circuit; if there is a short circuit, it is directly determined to be defective, specifically including the following steps: Short circuit detection stage: disconnect the power supply, and measure the impedance between the test points. If it is less than 10Ω, it is judged as a short circuit; Functional test phase: Power on only when there is no short circuit, verify the communication protocol and GPIO level.

[0025] According to the above embodiment, the problem of power-on damage to devices caused by a short-circuited PCB is solved by adopting a hierarchical detection mechanism of first offline short-circuit screening and then power-on testing.

[0026] For example, in one embodiment of the intelligent main control board detection device, the recognition module's camera resolution is ≥ 2 megapixels, and the recognition algorithm includes PCB outline matching and positioning hole recognition. This visual positioning algorithm, combining template matching and positioning hole recognition, achieves recognition accuracy of 0.5 mm, addressing the problem of large PCB positioning errors and reducing misjudgment rates.

[0027] For example, in the intelligent main control board detection device provided in one embodiment, the control module adopts a priority interrupt mechanism: short circuit alarm has the highest priority, and the detection result is transmitted through USART.

[0028] For example, in one embodiment, the display module performs operations including: locally storing the number of qualified / defective products, automatically uploading the detection results to the server, and displaying the current detection status in real time, such as the qualification rate, fault code, etc.

[0029] According to the above-mentioned embodiments, the detection data island problem is solved through local storage and network uploading, the whole-process data is traceable, and the fault board card traceability time is ≤10 minutes.

[0030] For example, in one embodiment, the display module performs operations including: locally storing the number of qualified / defective products, automatically uploading the detection results to the server, and displaying the current detection status in real time, such as the qualification rate, fault code, etc.

[0031] The second aspect of the application provides a PCB intelligent detection method, as shown in Figure 2 The steps include: Step 1: Place the PCB to be tested in the designated detection area, and transmit it to the detection area by the transmission mechanism. The recognition module is visually positioned, and the recognition module recognizes the PCB in the detection area and transmits the signal to the control module. Step 2: The mechanical arm moves the PCB to the detection fixture, and the probe contacts the test point. Specifically, after receiving the signal, the control operation module moves the PCB to be tested to the test fixture, and the PCB is connected to the test module through the probe on the fixture. Step 3: Layered detection: offline short circuit test first, then power-on function verification; Specifically, the detection module first checks whether the PCB to be tested has a short circuit. If there is a short circuit, it is directly determined to be defective, and the result is sent to the control module. If there is no short circuit, the detection module will perform power-on detection function on the PCB, and send the detection result to the control module. Step 4: Control the mechanical arm to paste the qualified / defective label and sort; Specifically, after receiving the detection result, the control module controls the operation module to paste the label (qualified / defective) on the PCB and moves it to the corresponding area for storage. Step 5: After the above operation is completed, the control module sends the detection result to the display module for display, and the display module updates the data and uploads it to the cloud.

[0032] The PCB intelligent detection method of the application solves the problem of insufficient standardization of traditional detection methods through strict timing control: visual positioning → mechanical arm moving → layered detection → automatic labeling. It creates a "offline short circuit screening first, then power-on function verification" process, solves the industry board burning pain point, opens up the "detection data → MES system → process optimization" closed loop, and realizes quality traceability.

[0033] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An intelligent main control board detection device, characterized in that: include: Identification module, including a camera, which is used to identify the PCB to the test area and then send a GPIO signal; An operating module, including a 485 communication robot arm, wherein the operating module has a vacuum suction cup and a label pasting mechanism; Test fixture with probe array to match PCB test points; The detection module connects to the PCB through a probe to perform short circuit detection and power-on functional testing; Control module, integrated with 485 / USART / CAN / GPIO interfaces, coordinates various modules; Display module, with CAN communication, display screen and network upload functions; Among them, after receiving the signal from the identification module, the control module controls the operation module to move the PCB to the detection fixture; then triggers the detection module to perform short circuit detection first, and then power-on function test; finally, according to the test results, the operation module is controlled to label and sort.

2. The intelligent main control board detection device according to claim 1, characterized in that: The probe array of the detection fixture is replaceable, and different probe boards are adapted to different PCB test point layouts.

3. The intelligent main control board detection device according to claim 1, characterized in that: The robotic arm of the operating module includes a vacuum suction cup, a rotating label head and a position feedback encoder. The suction area of ​​the vacuum suction cup covers the PCB size, and the rotating label head stores qualified / unqualified label rolls.

4. The intelligent main control board detection device according to claim 1, characterized in that: The detection module performs layered detection, including the following steps: Short circuit detection stage: disconnect the power supply, and measure the impedance between the test points. If it is less than 10Ω, it is judged as a short circuit; Functional test phase: Power on only when there is no short circuit, verify the communication protocol and GPIO level.

5. The intelligent main control board detection device according to claim 1, characterized in that: The camera resolution of the recognition module is ≥2 million pixels, and the recognition algorithm includes PCB outline matching and positioning hole recognition.

6. The intelligent main control board detection device according to claim 1, characterized in that: The control module adopts a priority interrupt mechanism: short circuit alarm is the highest priority, and the detection result is transmitted via USART.

7. The test method of the intelligent main control board detection device according to claim 1, characterized in that: The display module performs operations including: locally storing the number of qualified / defective products, automatically uploading the test results to the server, and displaying the current test status in real time.

8. The test method of the intelligent main control board detection device according to claim 1, characterized in that: It also includes an audible and visual alarm unit, which triggers a red flashing light and a long buzzer when a short circuit occurs; and a yellow slow flashing light when a functional failure occurs.

9. A PCB intelligent detection method, based on the intelligent main control board detection device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: The transmission mechanism feeds the PCB and the recognition module visually locates it; Step 2: The robotic arm moves the PCB to the test fixture, and the probe contacts the test point; Step 3: Layer detection: first perform an offline short-circuit test, then power on for functional verification; Step 4: Control the robotic arm to attach qualified / unqualified labels and sort; Step 5: The display module updates the data and uploads it to the cloud.

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