Automatic detection device for single board of nuclear power card PCBA

Abstract

The utility model discloses a nuclear power card PCBA single board automatic detection device, which relates to the technical field of nuclear power and comprises a control unit, a conditioning box, a feeding mechanism, a PCBA feeding and discharging frame, a PCBA single board, a conveying mechanism, an AOI detector, a visual positioning and bar code scanning device, a mechanical arm, a discharging mechanism, a work indicating lamp, an NG collection box and a test needle bed. The feeding mechanism comprises a PCBA feeding and discharging frame used for containing PCBA single boards to be detected, the PCBA single boards are conveyed to the conveying mechanism one by one according to the set rhythm in a conveying belt and air cylinder push-pull mode, and the functions of recognizing the directions of the PCBA single boards and preventing the PCBA single boards from being damaged in the grabbing process are achieved. The conveying mechanism is mainly composed of a high-precision conveying belt, and the running speed and the positioning precision of the conveying mechanism can be accurately regulated and controlled. The device does not need excessive manual intervention, can quickly complete the detection of various performance indexes of the single board, greatly shortens the detection period, and meets the production rhythm requirement of a nuclear power station for quickly putting a large number of nuclear power cards into use.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power technology, and in particular to an automatic detection device for nuclear power card PCBA single board. Background Technology

[0002] In the nuclear power field, various control and monitoring systems rely on a large number of nuclear power card components to ensure the safe and stable operation of nuclear power plants. AI, AO, DI, DO, RTD, PI, TC, and IOP are core components of these nuclear power card components, and their performance and quality directly affect the proper functioning of the entire card. Traditional inspection of nuclear power card PCBA single boards often relies on manual labor combined with some simple testing instruments, which has many drawbacks. Nuclear power card PCBA inspection involves manually checking each point, which is inefficient and easily influenced by the subjective factors of the inspectors. For example, mixed components cannot be identified manually, leading to misjudgments and a high false test rate. Furthermore, nuclear power card PCBA single boards typically have complex circuit structures and high quality and performance requirements. Manual inspection struggles to comprehensively and accurately detect issues such as micro-short circuits, multi-channel soldering, Flash chip damage, EPROM damage, open circuits, and potential component malfunctions. Mixed components cannot be identified manually, MCU and FPGA programming is complex, and there are also drawbacks such as multiple proprietary communication protocols that existing equipment cannot test for communication functions, the need to manually record test data in reports, and the inability to mass-produce. Furthermore, with the continuous expansion of nuclear power plant construction, the demand for nuclear power component parts is increasing, and traditional testing methods are insufficient to meet the actual needs for rapid, efficient, and accurate testing. Therefore, in response to the shortcomings of the existing technologies, this application proposes an automatic testing device for nuclear power component PCBA single boards. Utility Model Content

[0003] The purpose of this utility model is to address the technical problems existing in the production process of nuclear power AI, AO, DI, DO, RTD, PI, TC, and IOP card PCBA, such as electrical testing, mixing, communication, and chip function verification, and to propose an automatic testing device for nuclear power card PCBA single boards.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The nuclear power component PCBA single board automatic inspection device includes a control unit, a conditioning box, a feeding mechanism, a PCBA loading and unloading rack, a PCBA single board, a conveying mechanism, AOI inspection, visual positioning and barcode scanning, a robotic arm, a unloading mechanism, a work indicator light, an NG collection box, and a test needle bed.

[0006] Furthermore, the loading mechanism includes a PCBA loading / unloading rack for placing PCBA boards to be inspected. The PCBA boards are transported one by one to the conveying mechanism by means of a conveyor belt and a cylinder push-pull method, and it has the function of identifying the orientation of the PCBA boards and preventing damage to the PCBA boards during the gripping process.

[0007] Furthermore, the conveying mechanism is mainly composed of a high-precision conveyor belt, whose running speed and positioning accuracy can be precisely controlled. It can accurately transport PCBA boards obtained from the PCBA loading and unloading racks to the AOI inspection area. At the same time, it has anti-static protection measures during transportation to avoid electrostatic damage to the PCBA boards.

[0008] Furthermore, the AOI inspection, based on the appearance atlas of the PCBA board under test, after manual data annotation, marks the relevant inspection positions and trains the SIPAI_HD_PCBA_V2.01.PTH model. Through AOI visual inspection, the main functions are: first, to initially identify missing components, incorrect placement, tombstoning, chip damage, etc.; and second, to identify the board model and compare the identified model type with the specified components to give a conclusion.

[0009] Furthermore, the visual positioning and barcode scanning record the information and type of the PCBA board being measured through barcode scanning, and guide the robotic arm to grasp the material through visual positioning.

[0010] Furthermore, the robotic arm mainly includes a robotic arm body and a pneumatic gripper. It grasps PCBA single boards based on the position information fed back by visual positioning, places the PCBA single boards into a bed of needles, waits for the test results, puts qualified PCBA single boards into the unloading mechanism for unloading, and puts unqualified PCBA single boards into the NG collection box.

[0011] Furthermore, the control unit, as the control center of the entire device, adopts a self-designed edge computing terminal as its core. The control unit receives data feedback from various unit modules, industrial cameras, and conditioning boxes. At the same time, it controls the collaborative work of the feeding mechanism, conveying mechanism, and unloading mechanism according to the preset detection program and standards, thereby realizing the automated control of the entire detection process. It also has a visual operation interface, which makes it convenient for operators to perform parameter settings, detection status monitoring, and fault alarm prompts.

[0012] Furthermore, the test bed is a workbench for placing PCBA single boards. It is a dedicated device for testing PCBA single cards used in nuclear power applications. Its surface is provided with card slots that are adapted to the positioning of the PCBA single board and electrical interfaces that connect to the testing module. This ensures that the PCBA single board is in a stable and correct electrical connection state during testing, which facilitates the testing module to carry out testing work. The test bed consists of multiple probes, each probe corresponding to a connection point, used to test the resistance, capacitance, inductance, chips, connector components, and functions of the PCBA single board.

[0013] Furthermore, the conditioning box includes a circuit connectivity detection submodule, which uses micro-resistance measurement technology to send a small current signal to the PCBA single-board circuit and detect feedback to determine whether there is an open circuit or short circuit; it also includes a component performance detection submodule, which accurately measures the capacitance, resistance, and transistor amplification factor of key components on the PCBA single board to determine whether the components meet the design requirements; and a signal transmission detection submodule, which simulates the signal input in actual operation to detect whether the single-board output signal is accurate, thereby verifying the integrity of the signal processing and transmission functions.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model requires minimal human intervention and can quickly complete the testing of various performance indicators of a single board, greatly shortening the testing cycle and meeting the production rhythm requirements of nuclear power plants for the rapid deployment of a large number of nuclear power components.

[0016] 2. This utility model overcomes the shortcomings of manual inspection, which is prone to misjudgment, through a precise detection module and a reasonable detection process. It can accurately detect problems on PCBA boards, from macroscopic circuit connections to microscopic component performance parameters, ensuring that every nuclear power card PCBA board put into use meets high-quality and high-performance nuclear power application standards.

[0017] 3. This utility model can automatically complete the testing process. From board loading, barcode scanning, AOI testing, PCBA testing to unloading, a series of operations can be completed without frequent manual operation. It can also automatically record test data, which facilitates subsequent data analysis, quality traceability and provides a basis for improving production processes, thereby improving the automation level and scientific management of nuclear power component production and testing.

[0018] In summary, this utility model has functions such as automatic material identification, automatic board detection, test data visualization, alarm for errors such as incorrect component placement, missing components, cold solder joints, tombstoning, PCB etching and solder joints, circuit misalignment, short circuits, open circuits, damaged LEDs, damaged chips, protocol and communication abnormalities, and drifting sampling resistor values. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] In the diagram: 1. Loading mechanism, 2. PCBA loading / unloading rack, 3. PCBA single board, 4. Conveying mechanism, 5. AOI inspection, 6. Vision positioning and barcode scanning, 7. Robotic arm, 8. Unloading mechanism, 9. Work indicator light, 10. Control unit, 11. NG collection box, 12. Test needle bed, 13. Conditioning box. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model;

[0023] Reference Figure 1 The automatic inspection device for nuclear power plant component PCBA single board mainly consists of a feeding mechanism 1, PCBA loading and unloading rack 2, PCBA single board 3, conveying mechanism 4, AOI inspection 5, vision positioning and barcode scanning 6, robotic arm 7, unloading mechanism 8, work indicator light 9, control unit 10, NG collection box 11, test needle bed 12, conditioning box 13, etc.

[0024] The loading mechanism 1 includes a PCBA loading and unloading rack 2 for placing PCBA single boards 3 to be inspected. It transports the single boards one by one to the conveying mechanism 4 according to a set rhythm through a conveyor belt and cylinder push-pull method. It also has the function of identifying the direction of the PCBA single board 3 and preventing the PCBA single board 3 from being damaged during the gripping process.

[0025] Conveying mechanism 4: mainly composed of high-precision conveyor belts, whose running speed and positioning accuracy can be precisely controlled. It can accurately transport PCBA single boards 3 obtained from PCBA loading and unloading racks 2 to the inspection area of ​​AOI inspection 5. At the same time, it has anti-static protection measures during transportation to avoid electrostatic damage to PCBA single boards 3.

[0026] AOI Inspection 5: Based on the appearance atlas of the PCBA board under test, the relevant inspection positions are marked after manual data annotation, and the SIPAI_HD_PCBA_V2.01.PTH model is trained. Through AOI visual inspection, the main functions are: 1. To initially identify missing components, misplaced components, tombstoning, chip damage, etc.; 2. To identify the board model and compare the identified model type with the specified components to give a conclusion.

[0027] Visual positioning and barcode scanning 6: The information and type of the measured PCBA single board 3 are recorded by barcode scanning, and the robotic arm 7 is guided by visual positioning to grasp the material;

[0028] Robotic arm 7: mainly includes the robotic arm body and pneumatic gripper. It grabs PCBA single board 3 through the position information fed back by visual positioning, puts PCBA single board 3 into needle bed 12, waits for test results, puts qualified PCBA single board 3 into unloading mechanism 8 for unloading, and puts unqualified PCBA single board 3 into NG collection box 11.

[0029] Control Unit 10: As the control center of the entire device, it adopts a self-designed edge computing terminal as its core. It receives data feedback from various unit modules, industrial cameras and conditioning boxes 13. At the same time, it controls the coordinated work of the feeding mechanism 1, conveying mechanism 4 and unloading mechanism 8 according to the preset detection program and standards to realize the automated control of the entire detection process. It also has a visual operation interface, which makes it convenient for operators to perform parameter settings, detection status monitoring and fault alarm prompts.

[0030] Test bed 12: This is a workbench for placing PCBA single board 3. It is a dedicated device for testing PCBA single cards used in nuclear power applications. Its surface is equipped with card slots that are adapted to the positioning of PCBA single board 3 and electrical interfaces that connect to the testing module. This ensures that PCBA single board 3 is in a stable and correct electrical connection state during testing, which facilitates the testing module to carry out testing work. The test bed 12 consists of multiple probes, each probe corresponding to a connection point, used to test the resistance, capacitance, inductance, chip, connector components and functional tests of PCBA single board 3.

[0031] Conditioning Box 13: This is the core component of the device, integrating multiple detection sub-modules. These include a circuit connectivity detection sub-module, which uses micro-resistance measurement technology to send a small current signal to the PCBA board 3 circuit and detect feedback to determine if there is an open circuit or short circuit; a component performance detection sub-module, which precisely measures the capacitance, resistance, and transistor amplification factor of key components on the board to determine if the components meet design requirements; and a signal transmission detection sub-module, which simulates actual signal input to detect the accuracy of the board's output signal, thereby verifying the integrity of the signal processing and transmission functions.

[0032] The testing process for this utility model is as follows:

[0033] First, the loading mechanism 1 starts, taking the nuclear power card component PCBA single board 3 to be tested from the loading rack and conveying it to the conveying mechanism 4. The conveying mechanism 4 accurately delivers the PCBA single board 3 to the detection area of ​​the AOI detection 5 for testing. The AOI feeds back the information to the control unit 10. The control unit 10 controls the conveying mechanism 4 to deliver the PCBA single board 3 to the area of ​​visual positioning and barcode scanning 6 for scanning and positioning based on the results. Then, the robotic arm 7 places the PCBA single board 3 into the needle bed 12 and sends synchronous information to the conditioning box 13. The computing power card of the conditioning box 13 begins testing according to the type of PCBA single board 3. The detection module performs various tests on the PCBA single board 3 in a preset order, such as circuit connectivity testing, component performance testing, and signal transmission testing. During the testing process, the data is fed back to the computing power card of the conditioning box 13 in real time, and the computing power card notifies the control unit 10. The control unit 10 compares the received data with the preset pass criteria and, after completing the inspection, instructs the robotic arm 7 to pick up the PCBA board 3 and place it into the unloading mechanism 8. According to the instructions of the control unit 10, the PCBA board 3 is classified and collected. The entire inspection process is carried out automatically in a loop until all the PCBA boards 3 to be inspected have completed the inspection operation.

Claims

1. A nuclear power card PCBA single board automatic detection device, comprising a control unit (10), a conditioning box (13), characterized in that, It also includes feeding mechanism (1), PCBA feeding and discharging frame (2), PCBA single board (3), conveying mechanism (4), AOI detection (5), visual positioning and barcode scanning (6), mechanical arm (7), discharging mechanism (8), working indicator light (9), NG collection box (11), test needle bed (12).

2. The nuclear power card PCBA single-board automatic detection device according to claim 1, characterized in that, The feeding mechanism (1) includes a PCBA feeding and discharging frame (2) for placing the PCBA single board (3) to be detected. Through the conveying belt and cylinder push-pull mode, the PCBA single board (3) is conveyed to the conveying mechanism (4) one by one according to the set rhythm, and has the functions of identifying the direction of the PCBA single board (3) and preventing the PCBA single board (3) from being damaged during grabbing.

3. The nuclear power card PCBA single-board automatic detection device according to claim 2, characterized in that, The conveying mechanism (4) is mainly composed of a high-precision conveying belt, and its running speed and positioning accuracy can be accurately controlled, which can accurately transport the PCBA single board (3) obtained from the PCBA feeding and discharging frame (2) to the detection area of the AOI detection (5), and has anti-static protection measures during transportation to avoid static damage to the PCBA single board (3).

4. The nuclear power card PCBA single-board automatic detection device according to claim 3, characterized in that, The AOI detection (5) is based on the appearance atlas of the PCBA measured board card, and after manual data labeling, the relevant detection positions are calibrated, and the SIPAI_HD_PCBA_V2.01.PTH model is trained. Through AOI visual detection, the main function one is to preliminarily distinguish component missing, misplacement, monument, and chip damage, and the main function two is to identify the board card model, and compare the identified model type with the set parts to give a conclusion.

5. The nuclear power card PCBA single-board automatic detection device according to claim 4, characterized in that, The visual positioning and barcode scanning (6) records the information and types of the measured PCBA single board (3) through barcode scanning, and guides the mechanical arm (7) to grab the material through visual positioning.

6. The nuclear power card PCBA single-board automatic detection device according to claim 5, characterized in that, The mechanical arm (7) mainly includes a mechanical arm body and a pneumatic gripper, which grabs the PCBA single board (3) through the position information feedback of visual positioning, puts the PCBA single board (3) into the needle bed (12), waits for the test result, and puts the qualified PCBA single board (3) into the discharging mechanism (8) for discharging, and puts the unqualified PCBA single board (3) into the NG collection box (11).

7. The nuclear power card PCBA single-board automatic detection device according to claim 6, characterized in that, The control unit (10) is the control center of the whole device, which uses the edge computing terminal designed independently as the core. The control unit (10) receives data feedback from each unit module, industrial camera and conditioning box (13), controls the cooperative work of the feeding mechanism (1), conveying mechanism (4) and discharging mechanism (8) according to the preset detection program, realizes the automatic control of the whole detection process, and has a visual operation interface, which is convenient for operators to set parameters, monitor detection state and give fault alarm prompt.

8. The nuclear power card PCBA single-board automatic detection device according to claim 7, characterized in that, The test needle bed (12) is a worktable for placing the PCBA single board (3), and is a special device for detecting the nuclear power card PCBA single card. The surface of the test needle bed (12) is provided with a clamping groove matched with the PCBA single board (3) and an electrical interface connected with the detection module, so that the PCBA single board (3) is in a stable and correct electrical connection state during detection, and the detection module is facilitated to carry out detection work. The test needle bed (12) is composed of a plurality of probes, each probe corresponds to a connection point, and is used for detecting the resistance, capacitance, inductance, chip, connector element and function test of the PCBA single board (3).

9. The nuclear power card PCBA single-board automatic detection device according to claim 8, characterized in that, The conditioning box (13) comprises a circuit continuity detection sub-module, which utilizes a micro-resistance measurement technology, sends a small current signal to the circuit of the PCBA single board (3) and detects the feedback, and judges whether the circuit is in an open circuit or a short circuit condition. The conditioning box (13) further comprises a component performance detection sub-module, which accurately measures the capacitance value, resistance value and transistor amplification of the key components on the PCBA single board (3), and judges whether the components meet the design requirements. In addition, the conditioning box (13) further comprises a signal transmission detection sub-module, which simulates the signal input in actual work, detects whether the single board output signal is accurate, and verifies the integrity of the signal processing and transmission function.

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