Automatic detection device for single board of nuclear power card PCBA

Abstract

The invention discloses a nuclear power card PCBA single board automatic detection device, and relates to the technical field of nuclear power, the nuclear power card PCBA single board automatic detection device 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 detection device, 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 device has the functions of automatically identifying materials, automatically detecting board cards, visualizing test data, and alarming abnormal conditions such as wrong element pasting, missing pasting, insufficient welding, tombstone standing, PCB etching and continuous welding, circuit dislocation, short circuit, open circuit, lamp bead damage, chip damage, protocol and communication abnormity, sampling resistor resistance value drift and the like.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power, and in particular to a nuclear power card PCBA single board automatic detection device. Background Art

[0002] In the field of nuclear power, various control and monitoring systems rely on a large number of nuclear power cards to ensure the safe and stable operation of nuclear power plants. AI, AO, DI, DO, RTD, PI, TC, and IOP are the core components of nuclear power cards, and their performance and quality are directly related to whether the entire card can work properly. Traditionally, the PCBA single board inspection of nuclear power cards often relies on manual inspection combined with some simple detection instruments, which has many disadvantages. Nuclear power card PCBA inspections are all manual inspections of each point. Manual inspection is inefficient and easily affected by subjective factors of the inspectors. For example, mixed materials cannot be manually judged and misjudged, and the misdetection rate is high; and the PCBA single board of nuclear power cards usually has a complex circuit structure and high quality and performance requirements. Manual inspection is difficult to fully and accurately detect problems such as small short circuits, multi-way welding, Flash chip damage, EPROM damage, open circuits, and some potential poor performance of components, mixed materials cannot be manually judged, and MCU and FPGA program burning is complicated. Because there are many communication protocols and they are private protocols, existing equipment cannot test communication functions, test data records need to be manually written in reports, and cannot be mass-produced. In addition, with the continuous expansion of the scale of nuclear power plant construction, the demand for nuclear power card parts is increasing, and traditional detection methods are difficult to meet the actual needs of fast, efficient and accurate detection. Therefore, in view of the shortcomings of the above-mentioned prior art, this application proposes a nuclear power card PCBA single board automatic detection device. Summary of the invention

[0003] The purpose of the present invention is to address the problems of electrical detection, material mixing, communication, chip function verification and other technologies in the production process of nuclear power AI, AO, DI, DO, RTD, PI, TC, IOP card PCBA, and propose a nuclear power card PCBA single board automatic detection device.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

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

[0006] Furthermore, the loading mechanism includes a PCBA loading and unloading rack for placing the PCBA boards to be tested, and the PCBA boards are transported to the conveying mechanism one by one according to a set rhythm through a conveyor belt and a cylinder push-pull method, and have the function of identifying the direction of the PCBA boards and preventing the PCBA boards from being damaged during the grabbing 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, and can accurately transport the PCBA single board obtained from the PCBA loading and unloading rack to the inspection area of ​​AOI inspection. At the same time, it has anti-static and other protective measures during transportation to avoid electrostatic damage to the PCBA single board.

[0008] Furthermore, the AOI detection is based on the appearance atlas of the PCBA tested board, after manual data annotation, the relevant detection positions are calibrated, and the SIPAI_HD_PCBA_V2.01.PTH model is trained. Through AOI visual inspection, the main function is to preliminarily judge the missing components, wrong pasting, tombstones, chip damage, etc. The main function is to identify the board model, and compare the identified model type with the setting parts to give a conclusion.

[0009] Furthermore, the visual positioning and barcode scanning records the information and type of the measured PCBA board through barcode scanning, and guides the robot arm to grab the material through visual positioning.

[0010] Furthermore, the robotic arm mainly includes a robotic arm body and a pneumatic gripper, which grabs the PCBA board through the position information fed back by visual positioning, places the PCBA board into the needle bed, waits for the test results, places the qualified PCBA board into the unloading mechanism for unloading, and places the unqualified PCBA board into the NG collection box.

[0011] Furthermore, the control unit serves as the control center of the entire device, and adopts an independently designed edge computing terminal as the core. The control unit receives data feedback from various unit modules, industrial cameras and conditioning boxes, and controls the collaborative work of the loading mechanism, conveying mechanism and unloading mechanism according to preset detection procedures and standards, thereby realizing automatic control of the entire detection process and having a visual operation interface, which facilitates operators to perform operations such as parameter setting, detection status monitoring and fault alarm prompts.

[0012] Furthermore, the test needle bed is a workbench for placing a PCBA single board. It is a special equipment for nuclear power card PCBA single card detection. Its surface is provided with a card slot that is adapted to the positioning of the PCBA single board and an electrical interface connected to the detection module to ensure that the PCBA single board is in a stable and correct electrical connection state during detection, which is convenient for the detection module to carry out detection work. The test needle bed is composed of multiple probes, each probe corresponds to a connection point, which is used to detect the resistance, capacitance, inductance, chip, connector components and functional testing 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 tiny current signal to the PCBA single board circuit and detect the feedback to determine whether the circuit is open or short-circuited; it also includes a component performance detection submodule, which accurately measures the capacitance value, resistance value, and transistor amplification factor of key components on the PCBA single board to determine whether the components meet the design requirements; there is also a signal transmission detection submodule, which simulates the signal input in actual work and detects whether the single board output signal is accurate, so as to verify the integrity of the signal processing and transmission functions.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention does not require excessive human intervention and can quickly complete the detection of various performance indicators of the single board, greatly shortening the detection cycle and meeting the production rhythm requirements of nuclear power plants for the rapid commissioning of a large number of nuclear power cards.

[0016] 2. The present invention overcomes the defect of easy misjudgment in manual detection through precise detection modules and reasonable detection processes, and can accurately detect problems in many aspects of PCBA boards, from macro circuit connection conditions to micro component performance parameters, to ensure that every nuclear power card PCBA board put into use meets high-quality and high-performance nuclear power application standards.

[0017] 3. The present invention can automatically complete the inspection process, and a series of operations from single board loading, code scanning, AOI inspection, PCBA inspection to unloading do not require frequent manual operations, and can automatically record the inspection data, which is convenient for subsequent data analysis, quality traceability and provides a basis for production process improvement, and overall improves the automation level and scientific management of nuclear power card production and inspection links.

[0018] In summary, the present invention has the functions of automatic material identification, automatic board detection, test data visualization, component mis-pasting, missing placement, cold soldering, tombstone, PCB etching and continuous soldering, line dislocation, short circuit, open circuit, lamp bead damage, chip damage, protocol and communication anomalies, sampling resistor resistance drift and other abnormal alarm functions. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] In the figure: 1 loading mechanism, 2 PCBA loading and unloading racks, 3 PCBA single board, 4 conveying mechanism, 5 AOI detection, 6 visual positioning and barcode scanning, 7 robotic arm, 8 unloading mechanism, 9 working indicator light, 10 control unit, 11 NG collection box, 12 test needle bed, 13 conditioning box. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention;

[0023] Reference Figure 1 The nuclear power card PCBA single board automatic detection device is mainly composed of a loading mechanism 1, a PCBA loading and unloading rack 2, a PCBA single board 3, a conveying mechanism 4, an AOI detection 5, a visual positioning and barcode scanning 6, a robotic arm 7, a loading and unloading mechanism 8, a working indicator light 9, a control unit 10, an NG collection box 11, a test needle bed 12, a conditioning box 13 and other parts.

[0024] The feeding mechanism 1 includes a PCBA loading and unloading rack 2 for placing the PCBA single board 3 to be tested. The single boards are transported to the conveying mechanism 4 one by one according to the set rhythm through the conveyor belt and the cylinder push-pull method, and have the function of identifying the direction of the PCBA single board 3 and preventing the PCBA single board 3 from being damaged during the grabbing process.

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

[0026] AOI inspection 5: According to the appearance atlas of the PCBA board under test, after manual data annotation, the relevant inspection positions are calibrated, and the SIPAI_HD_PCBA_V2.01.PTH model is trained. Through AOI visual inspection, the main function 1 is to preliminarily identify the missing components, wrong pasting, tombstones, chip damage, etc. The main function 2 is to identify the board model, and compare the identified model type with the setting parts to give a conclusion;

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

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

[0029] Control unit 10: As the control center of the entire device, it adopts the independently designed edge computing terminal as the core. It receives data feedback from various unit modules, industrial cameras and conditioning boxes 13, and controls the collaborative work of the loading mechanism 1, the conveying mechanism 4 and the unloading mechanism 8 according to the preset detection procedures and standards, so as to realize the automatic control of the entire detection process, and has a visual operation interface, which is convenient for operators to perform operations such as parameter setting, detection status monitoring and fault alarm prompts.

[0030] The test needle bed 12 is a workbench for placing the PCBA single board 3. It is a special device for detecting nuclear power card PCBA single cards. The surface of the test needle bed 12 is provided with a card slot adapted to the positioning of the PCBA single board 3 and an electrical interface connected to the detection module to ensure that the PCBA single board 3 is in a stable and correct electrical connection state during detection, which is convenient for the detection module to carry out detection work. The test needle bed 12 is composed of multiple probes, each probe corresponds to a connection point, which is used to detect the resistance, capacitance, inductance, chip, connector components and functional tests of the PCBA single board 3;

[0031] Conditioning box 13: It is the core part of the device and integrates multiple detection submodules; including a circuit connectivity detection submodule, which uses micro-resistance measurement technology to send a small current signal to the PCBA single board 3 circuit and detect the feedback to determine whether the circuit is open or short-circuited; it also includes a component performance detection submodule, which accurately measures the capacitance value, resistance value, and transistor amplification factor of key components on the single board to determine whether the components meet the design requirements; in addition, there is a signal transmission detection submodule, which simulates the signal input in actual work and detects whether the single board output signal is accurate, so as to verify the integrity of the signal processing and transmission functions;

[0032] The detection process of the present invention is:

[0033] First, the feeding mechanism 1 is started, and the nuclear power card PCBA single board 3 to be tested is taken out from the feeding rack and conveyed 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 detection. The AOI feeds back the information to the control unit 10. The control unit 10 controls the conveying mechanism 4 to the area of ​​the visual positioning and barcode scanning 6 for scanning and positioning according to the results. Then the mechanical arm 7 puts the PCBA single board 3 into the needle bed 12 and sends synchronization information to the conditioning box 13. The computing power card of the conditioning box 13 starts to detect according to the type of the PCBA single board 3. The detection module carries out various detection tasks such as circuit connectivity detection, component performance detection and signal transmission detection on the PCBA single board 3 in a preset order. During the detection 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 and judges the received data with the preset qualified standards. After completing the inspection, it notifies the robot arm 7 to grab the PCBA single board 3 and put it into the unloading mechanism 8 to classify and collect the PCBA single board 3 according to the instructions of the control unit 10. The entire inspection process is automatically circulated until all the PCBA single 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) and a conditioning box (13), characterized in that: It also includes a loading mechanism (1), a PCBA loading and unloading rack (2), a PCBA single board (3), a conveying mechanism (4), AOI detection (5), visual positioning and barcode scanning (6), a robotic arm (7), a loading and unloading mechanism (8), a working indicator light (9), an NG collection box (11), and a test needle bed (12).

2. The nuclear power card PCBA single board automatic detection device according to claim 1 is characterized in that: The loading mechanism (1) comprises a PCBA loading and unloading rack (2) for placing the PCBA single boards (3) to be tested, and conveys the PCBA single boards (3) one by one to the conveying mechanism (4) in a set rhythm by means of a conveyor belt and a cylinder push-pull method, and has the function of identifying the direction of the PCBA single boards (3) and preventing the PCBA single boards (3) from being damaged during the grasping process.

3. The nuclear power card PCBA single board automatic detection device according to claim 2 is characterized in that: The conveying mechanism (4) is mainly composed of a high-precision conveyor belt, the running speed and positioning accuracy of which can be precisely controlled, and can accurately transport the PCBA single board (3) obtained from the PCBA loading and unloading rack (2) to the detection area of ​​the AOI detection (5), and at the same time, has anti-static and other protective measures during the transportation process to avoid electrostatic damage to the PCBA single board (3).

4. The nuclear power card PCBA single board automatic detection device according to claim 3 is characterized in that: The AOI inspection (5) is based on the PCBA board appearance atlas, after manual data annotation, the relevant inspection positions are calibrated, and the SIPAI_HD_PCBA_V2.01.PTH model is trained. Through AOI visual inspection, the main function is to preliminarily identify the missing components, wrong pasting, tombstones, chip damage, etc. The main function is to identify the board model, and compare the identified model type with the setting parts to give a conclusion.

5. The nuclear power card PCBA single board automatic detection device according to claim 4 is characterized in that: The visual positioning and barcode scanning (6) records the information and type of the PCBA single board (3) being measured 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 is characterized in that: The robot arm (7) mainly comprises a robot arm body and a pneumatic gripper, and grasps the PCBA single board (3) through position information fed back by visual positioning, places the PCBA single board (3) into a needle bed (12), waits for the test result, places the qualified PCBA single board (3) into a feeding mechanism (8) for feeding, and places the unqualified PCBA single board (3) into an NG collection box (11).

7. The nuclear power card PCBA single board automatic detection device according to claim 6 is characterized in that: The control unit (10) serves as the control center of the entire device, and adopts an independently designed edge computing terminal as the core. The control unit (10) receives data feedback from various unit modules, industrial cameras and conditioning boxes (13), and controls the coordinated work of the loading mechanism (1), the conveying mechanism (4) and the unloading mechanism (8) according to preset detection procedures and standards, thereby realizing automatic control of the entire detection process, and having a visual operation interface, which facilitates operators to perform operations such as parameter setting, detection status monitoring and fault alarm prompts.

8. The nuclear power card PCBA single board automatic detection device according to claim 7 is characterized in that: The test needle bed (12) is a workbench on which a PCBA single board (3) is placed. It is a special device for detecting a nuclear power card PCBA single card. A card slot adapted for positioning the PCBA single board (3) and an electrical interface connected to a detection module are provided on its surface to ensure that the PCBA single board (3) is in a stable and correct electrical connection state during detection, so as to facilitate the detection module to carry out detection work. The test needle bed (12) is composed of a plurality of probes, each of which corresponds to a connection point, and is used to detect the resistance, capacitance, inductance, chip, connector components and function test of the PCBA single board (3).

9. The nuclear power card PCBA single board automatic detection device according to claim 8 is characterized in that: The conditioning box (13) comprises a circuit connectivity detection submodule, which uses micro-resistance measurement technology to send a tiny current signal to the circuit of the PCBA single board (3) and detect the feedback to determine whether the circuit is open or short-circuited; and also comprises a component performance detection submodule, which accurately measures the capacitance value, resistance value, and transistor amplification factor of key components on the PCBA single board (3) to determine whether the components meet the design requirements; In addition, there is a signal transmission detection submodule, which simulates the signal input in actual work and detects whether the output signal of the single board is accurate, so as to verify the integrity of the signal processing and transmission functions.

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