Matrix type detection method and device for new energy automobile lamp circuit board

Abstract

The invention discloses a matrix type detection method and a test device for a new energy automobile lamp circuit board, and belongs to the technical field of the matrix type detection method for the new energy automobile lamp circuit board, and the matrix type detection method comprises the following steps: matching a matrix type jig and a customized tool with a region decoding system; one-time parallel, high-speed and non-contact identification is carried out by the programmable digital power supply, the test system and the parameter sampling module, the efficiency and accuracy of the innovation are far higher than those of manual single-point scanning in the prior art, a foundation is laid for subsequent parallel and efficient sequential tests, and the overall test efficiency is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of matrix detection methods for new energy vehicle headlight circuit boards, and specifically relates to a matrix detection method and detection device for new energy vehicle headlight circuit boards. Background Art

[0002] In existing technology, testing circuit boards for new energy vehicle headlights typically involves manual or semi-automated testing. For example, an operator manually connects a single circuit board to test equipment via a cable. Then, by powering the circuit board, they observe whether the headlight illuminates, displays uniform brightness, and displays the correct color to verify functionality. PCB identification also often relies on manual scanning of barcodes or QR codes.

[0003] This traditional detection method has many disadvantages: Inefficiency: Manually connecting, testing, and scanning barcodes for each circuit board is time-consuming and labor-intensive, and cannot meet the mass production needs brought about by the rapid development of the new energy vehicle industry.

[0004] Poor reliability: Manual visual inspection is easily affected by factors such as the operator's subjective judgment and visual fatigue, and is prone to missed detection or misjudgment of subtle brightness differences, color deviations, or intermittent faults.

[0005] Interface damage risk: Repeated manual plugging and unplugging of cables can easily cause wear and damage to circuit board interfaces or test cables, affecting test stability and increasing maintenance costs.

[0006] Low level of data: Detailed electrical parameters during testing (such as precise current and voltage values) are difficult to effectively record and analyze, making it impossible to form a complete product quality profile. This hinders quality traceability, production process monitoring, and process improvement. Integration with the Manufacturing Execution System (MES) is also low.

[0007] Lack of flexibility and depth: Traditional testing is often performed only under a single standard condition, making it difficult to simulate the performance of the circuit board under various actual working scenarios such as startup, full load, undervoltage, and overload. It also lacks the ability to detect potential hidden defects that are only exposed under specific conditions.

[0008] Adaptation cost and cycle issues: If dedicated test equipment or fixtures are developed for each new model of headlight circuit board, the initial investment cost will be high, the development cycle will be long, and the equipment will have poor versatility, which will easily lead to waste of resources and idle equipment.

[0009] Inefficient decoding and tracing: Manually scanning barcodes is not only slow but also prone to omissions, errors, or incorrect sequences, seriously affecting the binding of subsequent data to specific products, making the product traceability chain incomplete or unreliable.

[0010] Therefore, there is an urgent need for a new energy vehicle headlight circuit board detection technology that can improve detection efficiency, ensure detection accuracy and reliability, enhance test flexibility and depth, reduce adaptation costs and realize comprehensive data management. Summary of the Invention

[0011] The object of the present invention is to provide a matrix detection method for a new energy vehicle headlight circuit board to solve the problems raised in the above background technology.

[0012] To achieve the above objectives, the present invention provides the following technical solution: a matrix detection method for a new energy vehicle headlight circuit board; comprising the following steps: Loading and adapting: Place at least one vehicle lamp circuit board to be tested on a predetermined test station of the universal matrix fixture using a customized, quickly replaceable fixture that is adapted to its interface; Parallel decoding and identification: Using a surface area decoding system, an area containing the at least one vehicle lamp circuit board to be tested is imaged, and identity information (such as a one-dimensional or two-dimensional code) of the at least one vehicle lamp circuit board to be tested and / or its position information in the matrix fixture are decoded in parallel from the image; Program-controlled power supply: The test system controls a programmable digital power supply to independently supply power to the at least one vehicle lamp circuit board under test according to a current test condition in a preset test sequence associated with the identity information or for the location information; Parameter sampling: Sampling the current and voltage parameters of at least one powered vehicle light circuit board under test using a stepper current sampling module and a parallel voltage sampling module. The test sequence may include applying multiple varying input conditions to the same vehicle light circuit board under test to simulate different operating conditions, or sequentially testing multiple vehicle light circuit boards of different types or with different test requirements on a matrix fixture. Intelligent judgment and data management: The test system receives the identity information and / or location information, the current parameters and the voltage parameters, and judges the performance of the at least one headlight circuit board to be tested according to the preset judgment logic (for example, calculating the average value, maximum / minimum value or first qualified value of multiple sampling data and then performing threshold comparison), and uploads the judgment results and related data to the MES system.

[0013] As a preferred embodiment, the step of placing at least one vehicle lamp circuit board to be tested on a universal matrix fixture includes: simultaneously placing at least one vehicle lamp circuit board to be tested on different test stations of the universal matrix fixture; The area decoding system images the area containing the plurality of vehicle lamp circuit boards to be tested once or multiple times, and decodes the identity information and / or position information of each of the plurality of vehicle lamp circuit boards to be tested from the images in parallel; The step current sampling module and the parallel voltage sampling module can perform independent sampling on the multiple powered vehicle lamp circuit boards to be tested in parallel or based on the test sequence in a fast patrol manner.

[0014] As a preferred embodiment, when the test sequence includes applying multiple changing input conditions to the same vehicle light circuit board to be tested, the input conditions include changing according to multiple preset current step values, voltage step values or a combination thereof to evaluate the performance of the circuit board under different working conditions.

[0015] As a preferred embodiment, the programmable digital power supply has a bidirectional feedback function, which includes: real-time monitoring of the current flowing through the vehicle lamp circuit board to be tested and the sampling module and / or the voltage across its two ends as feedback parameters, and when the feedback parameter exceeds a preset protection threshold, adjusting the output or triggering a protection mechanism; and / or when the feedback parameter is within the protection threshold but deviates from the preset normal working range, judging the circuit board or test loop as abnormal.

[0016] As a preferred embodiment, the test system uploads the judgment result, the sampling data including the original or processed data of multiple samplings, the identity information and / or the location information to the MES system.

[0017] As a preferred embodiment, before the test system judges the received current parameters and voltage parameters, it includes executing a preset calculation method on multiple sampling data from the same point, and the calculation method is selected from: taking the average value, taking the maximum value, taking the minimum value, or taking the first measurement value that meets the preset specifications among multiple samplings.

[0018] The present invention also provides a matrix detection device for a new energy vehicle headlight circuit board, comprising: A universal matrix fixture having at least one test station and an interface for cooperating with the test station, for installing a replaceable custom fixture adapted to the interface of a specific vehicle lamp circuit board to be tested, the custom fixture being used to support and electrically connect the vehicle lamp circuit board to be tested; A surface area decoding system, comprising a wide-angle lens, a planar light source, and a decoding module, configured to image an area on the universal matrix fixture containing the vehicle lamp circuit board to be tested, and to decode from the image the identity information and / or position information of the vehicle lamp circuit board to be tested placed on the test station in parallel; A programmable digital power supply, used to supply power to the vehicle lamp circuit board to be tested on the test station; a step current sampling module, electrically connected to the test station, for sampling current parameters flowing through the circuit board of the vehicle lamp to be tested; A parallel voltage sampling module, electrically connected to the test station, for sampling voltage parameters on the circuit board of the vehicle lamp to be tested; a test system, communicatively connected to the face area decoding system, the programmable digital power supply, the step current sampling module, and the parallel voltage sampling module, and receiving the identity information and / or location information provided by the face area decoding system; and controlling the programmable digital power supply to supply power according to current test conditions in a preset test sequence for the vehicle lamp circuit board to be tested; Controlling the step current sampling module and the parallel voltage sampling module to execute the test sequence, which may include applying multiple changing input conditions to the same vehicle lamp circuit board to be tested, or sequentially testing multiple vehicle lamp circuit boards of different types or with different test requirements on the universal matrix fixture; receiving the sampled current parameters and voltage parameters, and judging the performance of the vehicle lamp circuit board to be tested based on preset criteria; and uploading the results and data to the MES system.

[0019] As a preferred embodiment, a universal matrix fixture has at least one test station for simultaneously carrying and electrically connecting multiple vehicle lamp circuit boards to be tested; The area decoding system is capable of decoding the identity information and / or position information of the respective vehicle lamp circuit boards to be tested on the multiple test stations in parallel; The step current sampling module and the parallel voltage sampling module have N sampling channels, which respectively correspond to different sampling requirements in the multiple test stations or test sequences, so as to realize independent sampling of multiple vehicle light circuit boards to be tested or the same circuit board under different conditions in parallel or in rapid patrol.

[0020] Furthermore, the test system is configured to control the programmable digital power supply and sampling module so that the input conditions change according to a plurality of preset current step values, voltage step values or a combination thereof when the test sequence includes applying a plurality of changing input conditions to the same vehicle lamp circuit board to be tested.

[0021] Furthermore, the programmable digital power supply has a bidirectional feedback control circuit, which is configured to: monitor in real time the current flowing through the vehicle lamp circuit board and the sampling module to be tested and / or the voltage across its two ends as feedback parameters, and adjust the output or perform a protection operation based on whether the feedback parameter exceeds a preset protection threshold, and / or send an abnormal indication signal to the test system based on whether the feedback parameter deviates from a preset normal working range; the test system is also configured with a communication interface with the MES system for uploading test data and results; before judging the received current parameters and voltage parameters, the test system performs a preset calculation method on multiple sampling data from the same point, and the calculation method can be selected from: taking the average value, taking the maximum value, taking the minimum value, or taking the measurement value that first meets the preset specifications among multiple samplings.

[0022] Compared with the prior art, the present invention has the following beneficial effects: This solution supports simultaneous loading and testing of multiple boards. Combined with an area decoding system, it performs one-time, parallel, high-speed, contactless recognition of the barcodes / QR codes on N PCBs across the entire panel. This innovation far exceeds the efficiency and accuracy of existing manual single-point scanning technologies, laying the foundation for subsequent parallel and efficient sequential testing, significantly improving overall test efficiency.

[0023] When processing heterogeneous boards / multiple test processes, this solution uses the unique identity code obtained through facet decoding. The test software can automatically associate and execute specific test procedures for circuit boards with different material numbers and different test processes within the panel, achieving automated and sequential testing, greatly improving the production line's ability to handle mixed orders and complex products.

[0024] For single-board multi-operating-condition simulation, various voltage / current input conditions (step current / voltage) can be programmably applied to the same circuit board to simulate its performance under various real-world operating conditions, including startup, full load, undervoltage, and on the verge of overload. For example, for LED automotive lights, starting performance at low current, brightness uniformity (screening for dark spots and partial dimming), rated performance at normal current, and overload capacity and stability at high current can be tested. This effectively exposes hidden defects, early failure risks, or insufficient performance margins that are difficult to detect under standard single test conditions, significantly improving the reliability of the final product.

[0025] The use of high-precision current sampling modules (such as 0.1% accuracy) and high-precision parallel voltage sampling modules, combined with the complex judgment logic built into the test system (such as averaging N sampling data to resist interference, taking maximum / minimum values to capture peaks or intermittent faults, or taking the first qualified value to optimize the efficiency and stability of specific test scenarios), ensures the accuracy of test results and the ability to capture various defects.

[0026] Programmable digital power supplies feature bidirectional feedback, enabling real-time monitoring of current and voltage across the entire test loop. By setting appropriate protection thresholds, this effectively protects not only the power supply itself and the test module, but also prevents damage to expensive circuit boards under test due to accidents such as short circuits and overloads. Furthermore, by monitoring whether current and voltage are within the preset normal operating range (not just the protection threshold), it can assist in diagnosing problems within the test loop (such as poor contact and fixture aging) and more precisely screen out defective products with abnormal electrical parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of a method flow in an embodiment of the present invention; Figure 2 2 is a system architecture diagram of an embodiment of the present invention. Reference numerals include: matrix fixture 1, surface area decoding system 3, programmable digital power supply 4, step current sampling module 5, parallel voltage sampling module 6, test system 7, MES system 8 DETAILED DESCRIPTION Example

[0028] See also Figure 1-2 The present invention provides a matrix detection device for a new energy vehicle headlight circuit board, comprising: Universal matrix fixture 1 and customized tooling: The universal matrix fixture 1 is designed with a standardized mounting base and electrical connection interface. Its own development cycle is long (such as more than 1 month) and the initial investment is high, but its core value lies in its reusability. Simple and low-cost customized tooling is designed and produced for different models of new energy vehicle headlight circuit boards A, circuit boards B, etc. For example, circuit board A requires Pogo Pin connection, and circuit board B requires plug-in connector connection, then the customized tooling 2a and 2b will be integrated with the corresponding connection mechanisms respectively, and can be quickly installed on the universal matrix fixture 1. It usually takes 1-2 days from receiving the circuit board sample to completing the customized tooling. When it is necessary to test circuit board A, the customized tooling 2a is installed on the fixture 1; when switching to test circuit board B, it is replaced with customized tooling b. This combination makes full use of the expensive fixture body 1, greatly reducing the cost and time of new product testing and introduction. The customized tooling can accommodate multiple (for example, 1 to n, such as Figure 2 FIG. 1 shows n circuit boards to be tested.

[0029] Face decoding system 3: When a custom fixture loaded with multiple circuit boards (for example, a panel containing 10 PCBs) to be tested is placed in the test station, the area decoding system 3 is activated. This system comprises the following modules: a wide-angle lens, one or more planar light sources (to ensure uniform illumination across the entire panel), and a decoding module with a built-in decoding algorithm. Before operation, the decoding module locates and edits the 1D or 2D code area on each PCB on a reference image and can also set the order in which the decoded information is output. During testing, the wide-angle lens takes a high-definition image of the entire panel. After receiving the image, the decoding module simultaneously (in parallel) identifies and decodes all pre-located barcodes / QR codes within the image, obtaining the unique ID of each PCB and its relative position within the panel. This decoded data (such as the ID list and order) is transmitted in real time to the test system 7. This method significantly improves speed and accuracy compared to traditional manual barcode scanning, eliminating the risk of missed or incorrect barcodes. Test system 7 and test sequence execution: The test system 7 is the control core of the entire detection device; Receiving Decoding Information and Invoking Programs: Test system 7 receives the identity IDs and location information of all PCBs on the panel from surface decoding system 3. The test software pre-stores test programs tailored to specific IDs (material numbers) or testing requirements (e.g., different test procedures for L- and R-boards). Based on this information, test system 7 matches and loads the appropriate test program for each PCB on the panel.

[0030] Program-controlled power supply and parameter sampling: Heterogeneous Board / Multi-Process Sequential Testing: If the panel contains different types of PCBs (such as L / R pairs of headlight control boards, which often appear on the same large board but may have different test focus or parameter ranges), the test system 7 controls the programmable digital power supply 4 in a preset sequence (or according to a decoded sequence) to output the voltage and current specified by the corresponding test program to the PCB under test. The step current sampling module 5 and parallel voltage sampling module 6 (both with high precision, such as 0.1% current accuracy and 6.5 1 / 2 digit voltage accuracy) sample the actual operating current and voltage at key points on the PCB. After completing testing on one PCB, the system automatically switches to the next PCB.

[0031] Single-board multi-condition testing: For a specific PCB, the test procedure may include multiple test phases to simulate different operating conditions. For example, the test procedure may include the following: Phase 1 (Startup / Low-Load Test): Digital power supply 4 outputs a low voltage V1 (such as the chip's lower operating voltage) and a low current I1. The sampling module records the current I's1 and voltage V's1 during this phase. This phase can be used to detect defects such as dark spots, uneven brightness, or failure to start up under low current in LED lamps.

[0032] Phase 2 (rated load test): Digital power supply 4 outputs rated operating voltage V2 and rated current I2. The sampling module records current I's2 and voltage V's2. This phase evaluates its performance under normal operating conditions.

[0033] Phase 3 (overload / high load test): The digital power supply 4 outputs a higher voltage V3 (such as the upper limit voltage of the specification) and a larger current I3. The sampling module records the current I's3 and voltage V's3. This phase can be used Programmable digital power supply 4 with bidirectional feedback function: When the digital power supply 4 supplies power to the circuit board under test, its internal control circuit or cooperates with external sensors to monitor the actual output current and voltage in real time.

[0034] Protection: The test software can set upper protection thresholds for current and voltage for each test phase. If the monitored actual value exceeds this threshold (for example, due to a short circuit causing a current surge), the digital power supply 4 will immediately cut off or limit its output to protect itself, the sampling modules 5 and 6, and the circuit board under test from damage.

[0035] Intelligent monitoring: In addition to hard protection thresholds, you can also set a "normal operating range" for current and voltage. If the monitored value is still within the protection threshold but exceeds the preset "normal operating range" (for example, the quiescent current of a board is much higher than other good products in the same batch), the test system will mark it as abnormal. This may indicate leakage or other defects in the board, or there may be problems with the test circuit itself (such as poor probe contact or aging fixture).

[0036] Complex judgment logic and data management of test system 7: After receiving the N channels (corresponding to N test stations or N test phases) of current and voltage data collected by the sampling modules 5 and 6, the test system 7 processes the data according to the preset judgment logic. The specific steps are as follows: Averaging algorithm: For certain parameters that require high stability (such as a chip's operating voltage), the system may sample the same point multiple times (for example, 10 times) within a short period of time, calculate the average value, and then compare it with the standard specification. This helps eliminate random noise interference.

[0037] Maximum / minimum value algorithm: For parameters that need to capture peak or valley values (such as starting inrush current and minimum operating voltage), the system will take the maximum or minimum value from multiple samples for judgment.

[0038] First pass value algorithm: In some rapid screening scenarios, as long as one measurement value among N samples falls within the pass range, it can be judged as OK, and the test may be terminated early to improve efficiency.

[0039] Based on the judgment result (Pass / Fail), the test system 7 will bind the result with the PCB identity ID obtained previously by decoding, and upload the detailed test data (including the original sampling value, the calculated value, the test conditions, the timestamp, etc.) to the MES system 8 to form a complete electronic traceability record.

[0040] When working: Figure 1 As shown, A panel containing multiple (1-n) headlight circuit boards to be tested (using custom tooling) is placed into a matrix fixture. The area decoding system decodes the identity information of all circuit boards simultaneously.

[0041] The test system calls the corresponding test program according to the decoded information and controls the digital power supply to supply power to each circuit board according to the preset sequence and conditions.

[0042] The step current sampling module and the parallel voltage sampling module perform high-precision, independent (or time-sharing independent) sampling of the electrical parameters of each circuit board.

[0043] The test system calculates and judges the sampled data, and uploads the results and data to the MES system for real-time monitoring and management.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A matrix detection method for new energy vehicle headlight circuit boards, characterized by: The following steps are involved: Placing at least one vehicle lamp circuit board to be tested on a predetermined test station of a universal matrix fixture (1) via a customized fixture (2) that is adapted to an interface of the vehicle lamp circuit board to be tested and can be quickly replaced; An area containing the at least one vehicle lamp circuit board to be tested is imaged by a surface area decoding system (3), and identity information of the at least one vehicle lamp circuit board to be tested and / or position information thereof in the matrix fixture (1) are decoded in parallel from the image; The programmable digital power supply (4) is controlled by the test system (7) to independently supply power to the at least one vehicle lamp circuit board to be tested according to a current test condition in a preset test sequence associated with the identity information or for the location information; The current parameters and voltage parameters of the at least one powered vehicle light circuit board to be tested are sampled by a step current sampling module (5) and a parallel voltage sampling module (6), wherein the test sequence may include applying a plurality of varying input conditions to the same vehicle light circuit board to be tested, or sequentially testing a plurality of vehicle light circuit boards to be tested of different types or with different test requirements on the matrix fixture (1); The test system (7) receives the identity information and / or location information, the current parameter and the voltage parameter, and judges the performance of the at least one vehicle lamp circuit board to be tested according to a preset criterion.

2. The matrix detection method for new energy vehicle headlight circuit boards according to claim 1, characterized in that: The step of placing at least one vehicle lamp circuit board to be tested on a universal matrix jig (1) comprises: placing at least one vehicle lamp circuit board to be tested on different test stations of the universal matrix jig (1) at the same time; The area decoding system (3) images the area containing the plurality of vehicle lamp circuit boards to be tested once or multiple times, and decodes the identity information and / or position information of each of the plurality of vehicle lamp circuit boards to be tested in parallel from the images; The step current sampling module (5) and the parallel voltage sampling module (6) can perform independent sampling on the multiple powered vehicle light circuit boards to be tested in parallel or based on a rapid round-robin test sequence.

3. The matrix detection method for new energy vehicle headlight circuit boards according to claim 1 or 2, characterized in that: When the test sequence includes applying multiple changing input conditions to the same vehicle lamp circuit board to be tested, the input conditions include changing according to multiple preset current step values, voltage step values or a combination thereof to evaluate the performance of the circuit board under different working conditions.

4. The matrix detection method for new energy vehicle headlight circuit boards according to claim 1 or 2, characterized in that: The programmable digital power supply (4) has a bidirectional feedback function, which includes: real-time monitoring of the current flowing through the vehicle lamp circuit board to be tested and the sampling module and / or the voltage across the two ends thereof as feedback parameters, and when the feedback parameters exceed a preset protection threshold, adjusting the output or triggering a protection mechanism; and / or when the feedback parameters are within the protection threshold but deviate from a preset normal operating range, judging the circuit board or the test loop as abnormal.

5. The matrix detection method for new energy vehicle headlight circuit boards according to claim 1 or 2, characterized in that: The test system (7) uploads the judgment result, the sampling data including the original or processed data of multiple samplings, the identity information and / or the location information to the MES system (8).

6. The matrix detection method for new energy vehicle headlight circuit boards according to claim 1 or 2, characterized in that: Before the test system (7) judges the received current parameters and voltage parameters, it includes executing a preset calculation method on multiple sampling data from the same point, and the calculation method is selected from: taking an average value, taking a maximum value, taking a minimum value, or taking the measurement value that first meets the preset specifications among multiple samplings.

7. A matrix detection device for new energy vehicle headlight circuit boards, characterized in that: include: A universal matrix fixture (1) has at least one test station and is configured with an interface that cooperates with the test station, and is used to install a replaceable customized fixture (2) that is adapted to the interface of a specific vehicle lamp circuit board to be tested, wherein the customized fixture (2) is used to carry and electrically connect the vehicle lamp circuit board to be tested; A surface decoding system (3) comprising a wide-angle lens (3a), a planar light source (3b) and a decoding module (3c), configured to image an area on the universal matrix fixture (1) containing the vehicle lamp circuit board to be tested, and to decode from the image the identity information and / or position information of the vehicle lamp circuit board to be tested placed on the test station in parallel; A programmable digital power supply (4) is used to supply power to the circuit board of the vehicle lamp to be tested on the test station; a step current sampling module (5), electrically connected to the test station, for sampling current parameters flowing through the circuit board of the vehicle lamp to be tested; A parallel voltage sampling module (6), electrically connected to the test station, for sampling voltage parameters on the circuit board of the vehicle lamp to be tested; The test system (7) is respectively connected to the face area decoding system (3), the programmable digital power supply (4), the step current sampling module (5) and the parallel voltage sampling module (6), and receives the identity information and / or position information provided by the face area decoding system (3); controls the programmable digital power supply (4) to supply power according to the current test condition in the preset test sequence for the vehicle light circuit board to be tested; Controlling the step current sampling module (5) and the parallel voltage sampling module (6) to execute the test sequence, wherein the test sequence may include applying a plurality of varying input conditions to the same vehicle lamp circuit board to be tested, or sequentially testing a plurality of vehicle lamp circuit boards to be tested of different types or with different test requirements on the universal matrix fixture (1); The sampled current parameter and voltage parameter are received, and the performance of the vehicle light circuit board to be tested is judged according to a preset criterion.

8. The matrix detection device for new energy vehicle headlight circuit boards according to claim 7, characterized in that: The universal matrix fixture (1) has at least one test station for simultaneously carrying and electrically connecting a plurality of vehicle lamp circuit boards to be tested; The area decoding system (3) is capable of decoding the identity information and / or position information of the respective vehicle lamp circuit boards to be tested on the multiple test stations in parallel; The step current sampling module (5) and the parallel voltage sampling module (6) have N sampling channels, which respectively correspond to different sampling requirements in the multiple test stations or test sequences, so as to realize independent sampling of multiple vehicle lamp circuit boards to be tested or the same circuit board under different conditions in parallel or in a rapid patrol.

9. The matrix detection device for new energy vehicle headlight circuit boards according to claim 7 or 8, characterized in that: The test system (7) is configured to control the programmable digital power supply (4) and the sampling module so that the input conditions are changed according to a plurality of preset current step values, voltage step values or a combination thereof when the test sequence includes applying a plurality of changing input conditions to the same vehicle lamp circuit board to be tested.

10. The matrix detection device for new energy vehicle headlight circuit boards according to claim 7 or 8, characterized in that: The programmable digital power supply (4) has a bidirectional feedback control circuit, which is configured to: monitor in real time the current flowing through the vehicle lamp circuit board and the sampling module to be tested and / or the voltage across the current as feedback parameters, and adjust the output or perform a protection operation according to whether the feedback parameters exceed a preset protection threshold, and / or send an abnormal indication signal to the test system (7) according to whether the feedback parameters deviate from a preset normal working range; The test system (7) is also configured with a communication interface with the MES system (8) for uploading test data and results; before judging the received current parameters and voltage parameters, the test system (7) performs a preset calculation method on multiple sampling data from the same point, and the calculation method can be selected from: taking an average value, taking a maximum value, taking a minimum value, or taking the first measurement value that meets the preset specifications among multiple samplings.

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