An automatic detection system and method for a car projection lamp

Abstract

The application provides an automatic detection system and method for a car projection lamp, which is provided with a testing machine and an assembling machine. The assembling machine is provided with feeding and discharging assemblies, tool carriers, air tightness detection assemblies, laser marking machines and screw driving assemblies around the periphery of a ring-shaped assembling platform. The testing platform comprises imaging colorimeter detection assemblies, electrical performance testing assemblies and moving modules, which can realize automatic assembling and functional testing of the car projection lamp and effectively realize pattern detection and traceability of the product.

Description

Technical Field

[0001] This invention relates to the field of automotive projection lamps, and in particular, to an automatic detection system and method for automotive projection lamps. Background Technology

[0002] Automotive projection lights are lighting devices installed on vehicles to project patterns, logos, or information onto the ground or other surfaces, primarily for enhancing aesthetics, brand recognition, or practical functionality. With the car-buying demographic becoming increasingly younger, automotive projection lights, as an important component of vehicle appearance, are expected to receive higher standards. Furthermore, because automotive projection lights not only function as signal indicators but also play a broader role in information interaction, they are attracting increasing attention from lighting manufacturers, OEMs, and end consumers.

[0003] Traditionally, the assembly and testing of automotive projection lights are done manually. Firstly, manual assembly is extremely inefficient and cannot meet the demands of mass production. Secondly, human eye inspection is difficult and prone to false positives and false negatives due to fatigue.

[0004] Although there are some automatic detection devices for automotive projection lights in the prior art, such as Chinese invention patent application publication CN117092128A, which discloses a defect detection device for automotive projection lights, which includes a housing, a door installed on the housing, an image acquisition mechanism, a projection board, an industrial control computer and an alarm.

[0005] For example, Chinese invention patent application CN111665022A discloses an automated device for testing the performance of automotive welcome lights. This device includes a barcode scanner, a power supply, a multimeter, a camera, a PLC, and a host computer. The PLC controls the actuators. When testing begins, it controls a cylinder to install the welcome light module into the dark chamber and then controls the cylinder to connect the circuit to the welcome light module. Simultaneously, it sends a signal to the host computer indicating that testing is ready. Upon receiving the PLC's ready signal, the host computer initiates barcode scanning, then controls the programmable power supply to provide power to the welcome light module. The host computer also controls the multimeter to measure the current while the module is powered on and controls the camera to take pictures. The pictures are analyzed, and algorithms are used to calculate the luminous flux, color coordinates, and lumen value of the LED. Upon completion of testing, the host computer sends a signal to the PLC, which removes the circuit from the welcome light module and moves the module out of the dark chamber, thus completing the testing.

[0006] The shortcomings of the aforementioned existing technologies lie in the lack of specialized automated assembly and testing equipment for automotive projection lights, and the absence of specific testing methods for pattern integrity, clarity, localized yellowing, localized ghosting, and whether the pattern is installed backwards. Furthermore, existing technologies primarily test the luminous flux, color coordinates, and lumen values ​​of LED chips, lacking pattern inspection and product traceability capabilities.

[0007] For example, Chinese utility model patent CN 215636967U discloses a projection lamp device. By rotatably mounting the projection lamp motor on a fixed bracket and connecting an adjustment component to the fixed bracket and the projection lamp motor to drive its rotation, the projection lamp motor's angle can be adjusted through rotation. This eliminates errors caused by component processing and assembly, ensuring that the projected pattern and light pattern are free from distortion and deformation, thus improving the projection effect. However, real-time online detection of the absence of distortion and deformation in the projected pattern and light pattern is not possible.

[0008] For example, Chinese utility model patent CN209485660U discloses a vehicle headlight testing device, including a machine base equipped with a conveying device, a positioning device, a distance adjustment device, and a vehicle headlight testing device; it can automatically assemble and test vehicle headlights, significantly improving assembly efficiency and yield. However, this patent only describes the testing of vehicle headlight light and assembly, using two cameras to test the quality of the headlights, mainly detecting parameters such as the color and gradient of the light. In other words, the image of the tested headlight is detected by the cameras, not by the pattern projected by the projector. It is ineffective for defective products with acceptable external appearance and acceptable light color and brightness, but internal defects such as dust.

[0009] However, there is an urgent need in the existing technology for a technical solution that can achieve automatic assembly and automatic detection of the quality of the projected pattern. Summary of the Invention

[0010] To address the aforementioned problems, this invention provides an automatic testing system and method for automotive projection lamps, which enables automated assembly and functional testing of automotive projection lamps, effectively achieving pattern detection and product traceability.

[0011] According to one aspect of the present invention, an automatic testing system for automotive projection lamps is provided, the automatic testing system for automotive projection lamps comprising a testing machine and an assembly machine connected side by side;

[0012] The testing equipment is located to the left of the automatic detection system. The testing equipment includes a darkroom, which contains a testing platform and a light projection module.

[0013] The assembly station is located to the right of the automatic detection system. The assembly station includes a transport component and a ring-shaped assembly platform that can move inside and outside the dark chamber of the test station.

[0014] The projection lamp on the vehicle platform that has completed the test on the test platform is transported to the ring assembly platform by the moving module via the lifting door located on the side of the test machine and by the transport component; the lifting door is closed in the test state and open in the non-test state.

[0015] The ring-shaped assembly platform is equipped with tooling, loading and unloading components, screw-driving components, airtightness testing components, and laser marking machines around its perimeter. The handling components include an X module that moves in the X direction, a Y module that moves in the Y direction, and a Z module that moves in the Z direction. The Z module is lifted and moved by a cylinder.

[0016] The testing equipment includes a testing platform comprising a testing module and a first moving module. The testing module includes an imaging colorimeter detection component mounted on the first moving module, capable of moving forward and backward along the Y-axis and up and down along the Z-axis via the Y-axis moving module and the first Z-axis moving module, respectively. The projection module includes an electrical performance testing component and a rotating platform. The electrical performance testing component is mounted on one side of the rotating platform. The platform is used to hold the projector lamp under test for projection and is mounted on the second moving module. It can move left and right along the X-axis and up and down along the Z-axis via the X-axis moving module and the second Z-axis moving module, respectively (this platform contains the electrical performance testing component). It is important to emphasize that, since both the second moving module and the transport assembly can move in the XZ directions, different technical terms are used to characterize them to avoid confusion. The second moving module is located inside the testing machine and can move left and right as well as up and down. The X module, Y module, and Z module refer to the transport module in the transport assembly. The X-axis moving module and Z-axis moving module refer to the moving modules in each direction of the second moving module, and do not refer to the same component. The main function of the transport module is to transport the products in the tooling on the ring assembly platform to the carrier platform on the second moving module.

[0017] Alternatively, the second moving module includes a portion inside the testing machine, wherein the aforementioned Y-axis moving module, first Z-axis moving module, second Z-axis moving module, and X-axis moving module are located inside the testing machine, while the portion outside the testing machine, namely the aforementioned X module, Y module, and Z module, is located in the transport assembly, which can provide movement support for each component.

[0018] According to the above-mentioned automatic detection system, the imaging colorimeter detection component, as a test module, is installed in parallel with the projection module. The head of the test module faces the top of the machine to detect various parameters of the pattern projected by the projector lamp, including but not limited to brightness, color (color coordinates, color temperature, etc.), character brightness, threshold brightness, two-dimensional brightness distribution, three-dimensional brightness distribution, chromaticity, character chromaticity, chromaticity, Blactmura, afterimage, viewing angle, contrast, etc.

[0019] According to the aforementioned automatic detection system, the electrical performance testing component can test various electrical properties of the projector lamp under test, such as voltage, current, power, and stability.

[0020] According to the above-mentioned automatic detection system, as a projection module, the projection lamp on the carrier platform is placed downwards. During detection, it is moved to a suitable position by the above-mentioned X-axis moving module and the second Z-axis moving module, and the rotating carrier platform is rotated 180 degrees to project an image toward the top of the machine. At this time, the test module detects the projected image.

[0021] According to the above-mentioned automatic detection system, the tooling includes a fixed base and a placement slot, which is used to firmly position the projector lamp under test in the placement slot of the fixed base during assembly and testing.

[0022] According to the aforementioned automatic detection system, the screw-fastening assembly is used to tighten the screws on the projection lamp.

[0023] According to the above-mentioned automatic detection system, the airtightness detection component is used to detect the airtightness of the projector lamp under test.

[0024] According to the aforementioned automatic detection system, the laser marking machine is used to mark on qualified projection lamps.

[0025] According to the above-mentioned automatic detection system, the first moving module includes an X-axis moving module, a Y-axis moving module, and a Z-axis moving module, and the second moving module includes an X-axis moving module and a Z-axis moving module. Among these moving modules and conveying components, at least an A-rail module and a B-rail module are installed for the moving modules to move along a set direction.

[0026] According to the above-mentioned automatic detection system, both the projection module and the test module are equipped with a Z-axis moving module.

[0027] According to the aforementioned automatic detection system, the carrier platform is used to receive the projector lamp to be tested, which is then transferred to the test platform, for optical performance testing and electrical performance testing.

[0028] According to the aforementioned automatic detection system, the carrier platform is equipped with a product sensor for sensing the product under test; a carrier module for receiving the projector lamp under test; a power supply module for providing power to the projector lamp under test; a 360° rotation module for rotating the carrier platform; a rotation sensor for sensing the rotation of the carrier platform; a combination sensor that uses different sensing logics to determine different carriers and thus identify different products, achieving compatibility with multiple products; and a clamping cylinder for driving and clamping the projector lamp under test. While the rotation module is nominally capable of rotating 360 degrees around the rotating bracket, in practice, it only needs to rotate the projector lamp's projection head 180 degrees from downward to upward. As for the combination sensor, at least three are installed on the carrier, with the number varying depending on the type of projector lamp. At least three sensors in the combined sensor array are designated as a, b, c, ... and so on. When the projector lamp under test is of the first type, sensors a, b, c, ... will sense according to the first type of sensing logic and transmit the sensing results back to the control system via short-range communication to program the automatic control program of the automated monitoring system. Similarly, when the projector lamp under test is of the second type, sensors a, b, c, ... will sense according to the second type of sensing logic and transmit the sensing results back to the control system via short-range communication to program the automatic control program of the automated monitoring system.

[0029] According to the aforementioned automatic detection system, the testing machine is installed in a darkroom, and the assembly machine is installed in a cabinet. The cabinet is also equipped with an all-in-one unit for automated operation of the entire system; a display for showing the operating status; a touchscreen and mouse / keyboard box for inputting operating commands; a gas source processing element for managing gas supply charging and discharging; a safety light curtain for emergency shutdown in case of operator intrusion during system operation; alarm lights for fault alarms; an ion fan for removing static electricity from the assembly machine; and a work platform support for assisting in the installation of the assembly machine cabinet.

[0030] According to the aforementioned automatic detection system, the automatic monitoring system has a cabinet door on the front.

[0031] The aforementioned automatic detection system also includes an air pump to provide an air source.

[0032] According to another aspect of the present invention, an automatic detection method for automotive projection lamps is provided, comprising the following steps:

[0033] S1. Place the car projection lamp cover on the circular assembly platform, and the loading and unloading components will automatically load it.

[0034] S2. Tighten the screws of the car projection light using the screw-fastening assembly;

[0035] S3. Verify the sealing performance of the tightened automotive projection lamp using an airtightness testing component.

[0036] S4. The transport assembly delivers the automotive projection light to the test platform, where electrical performance testing and optical pattern testing are performed sequentially.

[0037] S5. After the test is completed, the test platform is reset, and the transport components return the car projection light to the ring assembly platform.

[0038] S6. Automatically laser-mark qualified automotive projection lights, and alarm and record abnormal data for unqualified automotive projection lights.

[0039] Based on the above method, step S3 can be omitted to test projection lamps that do not require sealing performance verification.

[0040] Although the present invention is designed for testing automotive projection lamps, it is evident that the system and method of the present invention are applicable to any lamp that requires testing by testing a projected pattern.

[0041] According to the present invention, although the illustration shows the projection lamp moving between the test platform and the assembly platform by sharing a single track module, it is clear that an additional track module can be added to achieve non-stop back-and-forth movement, which can effectively shorten the CT time (i.e., the time interval between processing two workpieces).

[0042] Beneficial effects

[0043] The present invention has the following beneficial effects:

[0044] The automatic inspection system and method for automotive projection lamps according to the present invention enables one-stop automated assembly and functional testing of projection lamps because assembly and inspection are performed on the same assembly machine. It also enables pattern detection and effective product traceability. Fully automated operation improves production efficiency and assembly accuracy. Furthermore, through modularization and sensor combination, it can be compatible with more products, supporting flexible manufacturing. The addition of a track module allows for non-stop back-and-forth movement, effectively shortening CT time. Attached Figure Description

[0045] Figure 1 This is a perspective view of the exterior of an automatic detection system for automotive projection lights with a cabinet according to an embodiment of the present invention;

[0046] Figure 2 It is shown Figure 1 The diagram shows the internal structure of an assembly machine in an automatic detection system for automotive projection lights.

[0047] Figure 3 It is shown Figure 1 The diagram shows the internal structure of the overall machine tool in an automatic detection system for automotive projection lights.

[0048] Figure 4 It is shown Figure 3 An enlarged schematic diagram of the second Z-axis moving module in an automatic detection system for automotive projection lights;

[0049] Figure 5 This is a schematic diagram illustrating the process of generating a test report by an automatic detection system for automotive projection lights according to an embodiment of the present invention.

[0050] Figure 6 This is a schematic diagram showing the appearance of a projection lamp detected by an automatic detection system for automotive projection lamps according to an embodiment of the present invention.

[0051] Figure 7 This is a schematic diagram showing the second detection platform when the machine is turned on in an automatic detection system for automotive projection lights according to an embodiment of the present invention.

[0052] Figure 8 This is an enlarged schematic diagram showing a vehicle platform in an automatic detection system for automotive projection lights according to an embodiment of the present invention.

[0053] Reference numerals: 1-Testing machine; 2-Assembly machine; 3-Automatic testing system; 4-Projection lamp; 5-Transfer assembly; 6-Circular assembly platform; 7-Loading and unloading assembly; 8-Tooling fixture; 9-Air tightness testing assembly; 10-Testing platform; 11-Imaging colorimeter testing assembly; 12-Electrical performance testing assembly; 13-Air source treatment element; 14-Safety light curtain; 15-Mouse and keyboard box; 16-Ion fan; 17-Touch screen; 18-Monitor; 19-All-in-one machine; 20-Alarm light; 21-Laser marking machine; 22-Screw-driving assembly; 23-Laser marking position; 24-Working platform support; 25-A-rail module; 26-Screw-driving assembly robotic arm; 27-Y-axis moving module; 271-Y-axis moving... 272-Y-axis moving module's tank chain; 28-First Z-axis moving module; 281-Support frame; 29-B-rail module; 30-Second Z-axis moving module; 301-Slewing support bearing; 31-Lifting door side wall; 32-Air pump; 33-Second Z-axis moving module's tank chain; 34-Second Z-axis moving module's base; 35-Vehicle platform mounting seat; 36-Vehicle platform's rotating bracket side plate; 37-Vehicle platform; 38-X-axis moving module's moving shaft; 39-Analog imaging colorimeter detection range; 40-Product sensor; 41-Vehicle module; 42-Power supply module; 43-360° rotating module; 44-Rotation sensor; 45-Combination sensor; 46-Pressure cylinder;

[0054] 101 - Cabinet door; 102 - Lifting door; Detailed Implementation

[0055] The embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative and not restrictive.

[0056] Figure 1 This is a perspective view of the exterior of an automatic detection system for automotive projection lights with a cabinet, according to one embodiment. Figure 2 This is a structural diagram of the assembly machine in the automatic testing system; Figure 3 This is a schematic diagram of the overall structure of the automatic detection system.

[0057] like Figure 1-3 As shown, in one embodiment of the present invention, the automatic testing system for automotive projection lights includes a testing machine 1 and an assembly machine 2 connected side by side; the testing machine 1 includes a darkroom (i.e., the left cabinet), and a testing platform 10 is provided inside the darkroom. Figure 3 The assembly station 2 includes a transport assembly 5 and an annular assembly platform 6 that can move inside and outside the dark chamber of the test station 1;

[0058] The projection lamp 4 on the carrier platform 37, which has completed the test on the test platform 10, is transported to the ring assembly platform 6 via the lifting door 102 located on the side of the test machine 1 and the transport component under the transmission of the moving module; the lifting door 102 is closed in the detection state and open in the non-detection state.

[0059] The annular assembly platform 6 is surrounded by loading and unloading components 7, tooling 8, airtightness testing components 9, laser marking machine 21, and screw-driving components 22. The handling components include an X module that moves in the X direction, a Y module that moves in the Y direction, and a Z module that moves in the Z direction. The Z module is lifted and moved by a cylinder (not shown).

[0060] The testing machine 1 is equipped with a testing platform 10, which includes a testing module and a projection module. The testing module includes an imaging colorimeter detection component 11, which is mounted on the moving module and can move back and forth along the Y-axis and up and down along the Z-axis via the Y-axis moving module and the first Z-axis moving module of the moving module, respectively. The projection module includes an electrical performance testing component 12 and a rotating carrier platform 37. The electrical performance testing component 12 is mounted on one side of the rotating carrier platform 37. The carrier platform 37 is used to carry the projector lamp 4 under test for projection and is mounted on the moving module. It can move left and right along the X-axis and up and down along the Z-axis via the X-axis moving module and the second Z-axis moving module of the moving module, respectively (this carrier platform 37 contains the electrical performance testing component 12).

[0061] The test bench 1 and assembly bench 2 of the automatic testing system for automotive projection lamps are connected side by side on the table surface of the automated testing system 3. The test bench 1 has a test platform 10 inside, and the assembly bench 2 includes a transport component 5 and a ring-shaped assembly platform 6 located outside the test bench 1. The present invention is described using an automotive projection lamp 4 as an example. In fact, the present invention can be used to test the electrical and optical performance of all lamps. Figure 6 The middle section shows a front and rear view of two exemplary types of automotive projection lights 4. If other lights need to be inspected, only various changes or modifications need to be made accordingly, such as altering the corresponding size and shape. As for... Figure 8 The combined sensor 45 shown can sense different types of projection lamps according to different sensing logics.

[0062] See Figure 1-3 The annular assembly platform 6 is surrounded by loading and unloading components 7, tooling 8, airtightness testing components 9, laser marking machine 21, and screw-driving components 22. Figure 3 The robotic arm 26 of the screw-driving assembly 22 is marked in the figure; the loading and unloading assembly 7 is used to fix and position the projection lamp 4 when it enters the assembly and testing process and to allow it to flow out of the rail module after the assembly and testing is completed; the tooling fixture 8 includes a fixed base and a placement slot (not shown), which is used to firmly position the projection lamp under test in the placement slot of the fixed base during assembly and testing. In a preferred embodiment, the projection lamp 4 is locked in the loading and unloading assembly 7 or locked in the carrier module 41 that carries the projection lamp 4 (see Figure 8The airtightness testing component 9, as its name suggests, is used for airtightness testing of the projection lamp. This process is typically performed after the screw-tightening component 22, which is used to tighten the screws of the projection lamp 4, has finished tightening the screws. In some preferred embodiments, airtightness testing is unnecessary because lamps such as automotive projection lamps have already undergone airtightness testing upon arrival. The laser marking machine 21 is used to mark qualified products with information such as specifications, production number, and production date. Unqualified products do not require marking, and an alarm program is activated, such as flashing the alarm light 20, to indicate that the unqualified product has been removed from the conveyor system without requiring a marking process.

[0063] The test machine 1 is equipped with a test platform 10, which includes an imaging colorimeter detection component 11, an electrical performance test component 12, and a moving module.

[0064] The moving module provides movement support for each component within the testing machine 1. The moving module includes a first moving module and a second moving module. The first moving module includes a Y-axis moving module 27 and a first Z-axis moving module 28. The second moving module includes a second Z-axis moving module 30 and an X-axis moving module. Here, XYZ directions refer to the horizontal direction (X-axis) along the automated detection system 3, the vertical direction (Y-axis), and the center direction (Z-axis), a Cartesian coordinate system used merely for simplicity. The Y-axis moving module 27 is used for the longitudinal movement of the imaging colorimeter detection component 11 in the front-back direction. Figure 3 The diagram shows the tank chain 271 and support column 272 of the Y-axis moving module 27. The first Z-axis moving module 28 is used for the vertical movement of the imaging colorimeter detection component 11, and the second Z-axis moving module 30 is used for the vertical movement of the electrical performance testing component 12. The X-axis moving module is used for the horizontal movement of the components. Inside the test platform 1, the X-axis moving module provides lateral movement for the vehicle platform 37 to enter and exit the lifting door 102, and together with the moving modules located outside the test platform 1, completes the streamlined movement of the projection lamp. In this invention, as part of the moving module and the transport module, at least the A-rail module 25 and the B-rail module 29 are installed, and the moving module and the transport module move along the rail modules.

[0065] In this invention, the imaging colorimeter detection component 11 serves as a test module, projecting detection light onto the top of the machine platform 1. For ease of understanding, Figure 8 In the attached figure, reference numeral 39 represents a virtual detection field of view artificially drawn to simulate the detection range of the imaging colorimeter detection component, in order to detect various parameters of the projector lamp 4 under test, including but not limited to brightness, color (color coordinates, color temperature, etc.), character brightness, threshold brightness, two-dimensional brightness distribution, three-dimensional brightness distribution, chromaticity, character chromaticity, chromaticity, Blactmura, afterimage, viewing angle, contrast, etc.

[0066] The electrical performance testing component 12 is installed in the projection module (the module where the carrier platform 37 is located) and can test various electrical performance parameters of the projector lamp 4 under test, such as voltage, current, power, and stability.

[0067] In another preferred embodiment, the transport component 5 and the carrier platform 37 can be the same platform. That is, when the carrier platform 37 is moved outside the machine tool 1, it becomes the transport component 5. The carrier platform 37 is used to receive the projector lamp 4 to be tested and transferred to the test platform 1 for optical performance testing and electrical performance testing.

[0068] In this invention, for dust prevention and safety considerations, the assembly machine 2 and the testing machine 1 are installed together in the cabinet of the automated testing system 3. The testing machine 1 is located in the left cabinet, which is set as a darkroom. The assembly machine 2 is located in the right cabinet. An all-in-one machine 19 is set on the upper right side of the outside of the cabinet to automate the operation of the entire system. A display 18 is set next to it to display the operating status feedback of each component. A touch screen 17 and a mouse and keyboard box 15 are set at an appropriate height on the right cabinet to input operation commands. An air source treatment element 13 is placed in the lower cabinet door of the assembly machine 3 to manage the charging and discharging of the air source. An observation window is also set on the right cabinet to visually observe the operating status of the machine and can also be used as a simple maintenance port. A safety light curtain 14 is also set to stop the system in case foreign objects enter the observation window during operation (such as the testing operator accidentally putting their head or hand in). An alarm light 20 is used for fault alarms, including alarms when the operation of each component malfunctions and / or when unqualified products are detected. An ion fan 16 is also installed on the annular assembly platform 6 to remove static electricity from the assembly machine, or more precisely, to remove static electricity from the annular assembly platform 6 and its surrounding operating components. When the cabinet is installed on the automated monitoring system 3, the positioning and limiting function of the work platform support 24 helps to securely install the cabinet on the assembly machine 2.

[0069] According to the present invention, the front of the automated monitoring system 3 may also be provided with a cabinet door 101 to facilitate opening the machine for replacement of consumables or maintenance. In a preferred embodiment, side walls 31 are also provided on both sides of the lifting door 102 to limit the width of the lifting door 102 and facilitate its installation. In a preferred embodiment, the testing machine 1 also includes an air pump 32 as an air source for driving the cylinder (not shown).

[0070] Figure 4 It is shown Figure 3 An enlarged schematic diagram of the second Z-axis moving module in an automatic detection system for automotive projection lights. (See diagram below.) Figure 4As shown, the second Z-axis moving module 30 includes a tank track 33, a base 34, a mounting base 35, a rotating support side plate 36 for the vehicle platform, and a vehicle platform 37. This structure enables components located on the second Z-axis moving module 30, such as the electrical performance testing component 12 and the vehicle platform carrying the projection lamp 4, to switch between high and low positions and move in the vertical direction. This will be discussed later. Figure 8 The structure of the vehicle platform 37 will be described in detail below. In a preferred embodiment of the invention, the electrical performance testing assembly 12 is mounted on the rotating support side plate 36 of the vehicle platform.

[0071] Figure 5 This diagram illustrates the process by which the detection system of the present invention generates a detection report through image detection. Those skilled in the art will understand that this illustration is merely for convenience, as the detection parameters of the present invention include numerous parameters such as brightness, color (chromaticity coordinates, color temperature, etc.), character brightness, threshold brightness, two-dimensional brightness distribution, three-dimensional brightness distribution, chromaticity, character chromaticity, chromaticity, Blactmura, ghosting, viewing angle, contrast, etc. First, an image acquisition module is used to acquire an image, and the acquired image is preprocessed using a preprocessing module, such as contour construction and smoothing. Then, an analysis engine is used to compare, correct, calculate, and judge the preprocessed image data (illustrated in the diagram as pattern contour detection, distortion correction, brightness heatmap analysis, uniformity assessment, chromaticity coordinate calculation, and color tolerance judgment). Finally, an accurate image defect classification is obtained, thereby generating a detection report simultaneously with the detection of an image defect product alarm, providing guidance for subsequent production stages.

[0072] Figure 6 This is a schematic diagram showing the appearance of two different types of test projection lamps 4. Those skilled in the art will understand that this invention is applicable to many more types of automotive projection lamps and even other lighting fixtures.

[0073] Figure 7 This is a schematic diagram showing the second detection platform when the machine is turned on in an automatic detection system for automotive projection lights according to an embodiment of the present invention.

[0074] like Figure 7 As shown, the testing platform 1 includes a projection module and a testing module for performing optical and electrical performance tests on the automotive projection lamp, as well as for moving the vehicle platform. The testing module includes an imaging colorimeter detection component 11, a first Z-axis movement module 28, and a support frame 281 for supporting the detection component 11. The head of the detection component 11 faces the top of the testing platform 1 to detect whether the light image projected onto the top of the testing platform 1 by the projection lamp 4 (located on the vehicle platform 37) meets the requirements. If it does not meet the requirements, an alarm procedure is activated. Figure 7The upper part is a partially enlarged view of the imaging colorimeter detection component 11 supported by the first Z-axis moving module. The support frame 281 allows the detection component 11 to rotate around the support frame 281 at a certain angle. The projection module includes an electrical performance testing component 12, a second Z-axis moving module 30, and an X-axis moving module. A carrier platform 37 is mounted above the second Z-axis moving module. The electrical performance testing component is used to test the electrical performance of the projection lamp 4. The second Z-axis moving module 30 provides vertical movement and height adjustment for the electrical performance testing component 12 and the carrier platform 37, ensuring that the pattern of the projection lamp 4 can be completely projected onto the top of the testing machine 1. The X-axis moving module allows the second Z-axis moving module to move along the horizontal X-direction (…). Figure 7 The image shows the moving axis 38 of the X-axis moving module. The vehicle platform 37 can rotate 180 degrees around the slewing support bearing 301 of the rotating bracket side plate 36 of the vehicle platform on the second Z-axis moving module 30. Figure 8 The description details how the light projected by the projector lamp 4 (with the assistance of the X-axis movement module and the second Z-axis module) is almost entirely directed onto the light-transmitting plate (not shown) mounted on the top of the darkroom of the testing machine 1, ensuring that the detection component 11 can precisely capture the pattern projected by the projector lamp. Through testing in the testing machine 1, a comprehensive evaluation of the optical and electrical performance of the projector lamp 4 can be achieved. If a defect is detected, a defect detection report is generated and an alarm is triggered, allowing the module to exit the process.

[0075] Figure 8 This is an enlarged schematic diagram showing a vehicle platform in an automatic detection system for automotive projection lights according to an embodiment of the present invention.

[0076] like Figure 8 As shown, the carrier platform 37 includes a slewing support bearing 301 for enabling the carrier platform 37 to rotate 360 ​​degrees around the bearing 301; a product sensor 40 for sensing whether the projection lamp 4 is installed correctly; a carrier module 41 for supporting and fixing the projection lamp 4; a power supply module 42 for providing power to the projection lamp 4; a 360° rotation module 43 for driving the carrier platform 37 to rotate around the bearing 301 at a specified angle; and is mounted on the mounting platform 36 (see...). Figure 4The rotation sensor 44 on the mounting bracket (labeled) is used to sense the rotation of the vehicle platform 37; the combination sensor 45 uses different sensing logics to determine different vehicles, achieving compatibility with multiple products; the clamping cylinder 46 is used to clamp the projection lamp in the vehicle module 41 to prevent loosening during rotation, thus ensuring the accuracy of the detection results. In one embodiment of the present invention, three combination sensors are selected, denoted as a, b, and c. When the projected lamp being tested is of the first type, sensors a, b, and c will sense according to the first type of sensing logic and transmit the sensing results back to the control system via short-range communication to program the automatic control program of the automated monitoring system. Similarly, when the projected lamp being tested is of the second type, sensors a, b, and c will sense according to the second type of sensing logic and transmit the sensing results back to the control system via short-range communication to program the automatic control program of the automated monitoring system.

[0077] In one embodiment of the present invention, an automatic detection method for automotive projection lamps is also included, comprising the following steps:

[0078] S1. Place the car projection lamp cover on the circular assembly platform, and the loading and unloading components will automatically load it.

[0079] S2. Tighten the screws of the car projection light using the screw-fastening assembly;

[0080] S3. Verify the sealing performance of the tightened automotive projection lamp using an airtightness testing component.

[0081] S4. The transport assembly delivers the automotive projection light to the test platform, where electrical performance testing and optical pattern testing are performed sequentially.

[0082] S5. After the test is completed, the test platform is reset, and the transport components return the car projection light to the ring assembly platform.

[0083] S6. Automatically laser-mark qualified automotive projection lights, and alarm and record abnormal data for unqualified automotive projection lights.

[0084] In another implementation, step S3 is omitted to test projection lamps that do not require sealing performance verification.

[0085] Although the present invention pertains to the inspection of automotive projection lamps, it is evident that the system and method of the present invention are applicable to any lamp requiring inspection via test projection patterns. Since assembly inspection is performed on the same assembly machine, it enables one-stop automated assembly and functional testing of projection lamps. Because it enables pattern detection, it also effectively achieves product traceability. Due to its fully automated operation, it improves production efficiency and assembly accuracy. Furthermore, through modularization and combination of sensors, it can be compatible with more products, supporting flexible manufacturing. In another embodiment, an additional rail module can be added to enable non-stop back-and-forth movement, which can effectively shorten the CT time (i.e., the interval between processing two workpieces).

[0086] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An automatic detection system for automotive projection lights, characterized in that, The automatic testing system for automotive projection lights includes a testing machine and an assembly machine connected side by side; The testing equipment includes a darkroom containing a testing platform, and the assembly equipment includes a ring-shaped assembly platform and a transport component that can move inside and outside the darkroom of the testing equipment. The transport assembly is used to move the automotive projection light back and forth between the annular assembly platform and the vehicle platform; The vehicle platform is used to receive automotive projection lights that are transferred to the test platform for optical and electrical performance testing. The projection lamp on the vehicle platform that has completed testing on the test platform is moved to the annular assembly platform by the transfer of the moving module; the vehicle platform can rotate 180° to flip the projection direction of the projection lamp from downward to upward. The ring-shaped assembly platform is equipped with loading and unloading components, tooling fixtures, a laser marking machine, and screw-driving components around its perimeter. The test platform includes an imaging colorimeter detection component, an electrical performance testing component, and a mobile module. The mobile module provides movement support. The imaging colorimeter detection component is positioned facing the top of the test platform and is used to acquire the pattern image projected onto the top of the test platform after the projector lamp under test is flipped, in order to detect various parameters of the pattern projected by the projector lamp under test, including brightness, chromaticity, chromaticity, blactmura, afterimage, viewing angle, and contrast. The brightness includes threshold brightness, two-dimensional brightness distribution, and three-dimensional brightness distribution. The chromaticity includes character chromaticity. The imaging colorimeter detection component and the carrier platform are installed side by side. The tooling fixture includes a fixed base and a placement slot, which is used to position the projector lamp under test in the placement slot of the fixed base during assembly and testing.

2. The automatic detection system for automotive projection lamps according to claim 1, characterized in that, The electrical performance testing component is installed in the projection module and can test various electrical properties of the projector lamp under test.

3. The automatic detection system for automotive projection lamps according to claim 2, characterized in that, The annular assembly platform is also equipped with an airtightness testing component for testing the airtightness of the projector lamp being tested.

4. The automatic detection system for automotive projection lights according to claim 2, characterized in that, The laser marking machine is used to mark on qualified projection lamps.

5. The automatic detection system for automotive projection lamps according to claim 2, characterized in that, The screw-fastening assembly is used to tighten the screws on the projection lamp.

6. The automatic detection system for automotive projection lights according to claim 2, characterized in that, The projection module includes a carrier platform.

7. The automatic detection system for automotive projection lamps according to claim 6, characterized in that, The carrier platform is equipped with a product sensor to sense the product under test, a carrier module to receive the projector lamp under test, a power supply module to provide power to the projector lamp under test, a 360° rotation module to provide rotation to the carrier platform, and a rotation sensor to sense the rotation of the carrier platform.

8. A method for automatic detection using the automatic detection system as described in any one of claims 1 to 7, comprising the following steps: S1. Place the car projection lamp cover on the circular assembly platform, and the loading and unloading components will automatically load it. S2. Tighten the screws of the car projection light using the screw-fastening assembly; S3. Verify the sealing performance of the tightened automotive projection lamp using an airtightness testing component. S4. The transport assembly delivers the automotive projection light to the test platform, where electrical performance testing and optical pattern testing are performed sequentially. S5. After the test is completed, the test platform is reset, and the transport components return the car projection light to the ring assembly platform. S6. Automatically laser-mark qualified automotive projection lights, and alarm and record abnormal data for unqualified automotive projection lights.

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