A vehicle camera assembly performance detection device

Abstract

This invention relates to the field of optical component testing technology, specifically proposing a performance testing device for automotive camera components. It is used to test the transmittance of the front housing of an automotive camera component, including an optical path channel, a light source, a monochromator, a positioning carrier, an integrating sphere, and a detector. The device achieves centered horizontal positioning of the front housing relative to the light source and clamps it with appropriate force to ensure the stability and repeatability of the test, avoiding positioning tilt and deformation of the front housing. Based on the horizontal positioning and side clamping of the front housing, it automatically avoids the light transmittance testing area and effectively blocks and seals the central hole and the upper and lower edges of the side walls of the front housing to prevent light transmission through gaps. This effectively improves the accuracy of the front housing transmittance test, avoids test distortion and misjudgment, and reduces product waste caused by misjudgment.

Description

Technical Field

[0001] This invention relates to the field of optical component testing technology, and specifically proposes a performance testing device for automotive camera components. Background Technology

[0002] This invention proposes a performance testing device for automotive camera components, such as... Figure 2 The image shows the front housing of a certain model of automotive camera assembly. The front housing is the front half of the automotive camera housing, which is assembled and fitted with the rear housing. It is mainly used to position and install the lens, keep the optical axis aligned, form a sealed structure for light shielding, dustproofing, and waterproofing, and can also provide electromagnetic auxiliary shielding.

[0003] The front shell has a complex structure and precise dimensions, and is usually made of engineering plastics as raw materials for one-piece rapid injection molding. After injection molding, the front shell needs to undergo corresponding quality inspections, such as light transmittance testing. The purpose of light transmittance testing is to ensure that the front shell is opaque to visible light so that the lens can shield the interference of ambient light and ensure image quality. At the same time, it needs to have high transmittance to the laser used for welding to meet the requirements of subsequent welding and assembly of the front and rear shells and ensure welding quality.

[0004] Under current technology, the front shell can be quickly and automatically inspected using transmittance testing equipment and a matching automated conveying system. As the outer shell component of the optical lens, the front shell affects the imaging quality, stability, and lifespan of the camera, so the accuracy of the inspection must be guaranteed. The positioning carrier is a necessary structure for achieving stable inspection of the front shell, but the existing transmittance testing equipment is insufficient in front shell inspection and positioning.

[0005] The upper and lower surfaces of the front shell are typically light-transmitting detection areas. When inspecting the front shell, ensuring the stability and consistency of its positioning posture is crucial for maintaining repeatability and accuracy. Specifically, the front shell should be placed horizontally so that incident light can enter perpendicularly to the detection surface, and the front shell should be centered relative to the light source. In existing positioning carriers, some use a support structure to place the front shell to ensure horizontality. However, the support surface directly obstructs and blocks the light-transmitting area at the bottom of the front shell. Even if the support structure uses a nearly fully transparent material, new optical errors will be introduced due to refraction, reflection, scattering, absorption, and interference effects, thus affecting the accuracy of the light transmittance detection. Some carriers use no support structure and rely solely on lateral clamping to position and hold the front shell. However, due to the lack of bottom support, the lateral clamping process is prone to tilting due to asymmetry or imbalance of lateral clamping forces. Simple flexible clamping can also easily cause misalignment, affecting the repeatability of the detection, while simple rigid clamping can easily lead to unsuitable lateral clamping forces.

[0006] In summary, in existing transmittance testing equipment, the positioning carrier causes detection distortion due to obstruction of the transmittance detection area or positioning tilt; the repeatability of the test is affected by non-centered positioning; the positioning stability is poor due to insufficient clamping force; and the front shell is easily deformed due to excessive clamping force, affecting the detection accuracy and subsequent use. Furthermore, improper testing may result in qualified products being judged as unqualified products. In addition, the small size of the front shell will amplify the error. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides a performance testing device for automotive camera components, which solves the problems mentioned in the background section.

[0008] To achieve the above objectives, the present invention employs the following technical solution: a performance testing device for automotive camera components, used for transmitting light through the front housing of an automotive camera component, comprising an optical path channel, a light source, a monochromator, a positioning carrier, an integrating sphere, and a detector; the monochromator is disposed within the optical path channel and is used to monochromate the light source into monochromatic incident light; the positioning carrier is assembled within the optical path channel and includes a side rubber sleeve, a guide rail, and a fixing beam arranged sequentially on the inner wall of the optical path channel; a plugging component for sealing the central hole of the front housing is fixed at the upper end of the fixing beam, and a vertically sliding and elastically fitted component is sleeved on the plugging component. The reset support platform is used to horizontally place the front shell; multiple side clamping assemblies, fitted with side rubber sleeves, are horizontally slidably mounted on the guide rail; the guide rail can limit the side clamping of the side clamping assemblies and vertically limit the support platform; a linkage assembly is assembled on the fixed beam, which works in conjunction with the support platform and the side clamping assemblies; when the support platform rises to the limit height of the guide rail, it locks into the guide rail; when the linkage assembly drives the side clamping assemblies to clamp the front shell, the side clamping assemblies first drive the side rubber sleeves to pre-clamp the side wall of the front shell, then the support platform unlocks and descends to disengage from the front shell, simultaneously driving the side clamping assemblies to move to the limit position of the guide rail and clamp into contact with the side wall of the front shell.

[0009] The integrating sphere and the light source are respectively mounted at both ends of the optical path channel to collect the transmitted light transmitted through the front shell and form a uniform illuminance. The light source, monochromator, positioning carrier and integrating sphere are vertically arranged in sequence. The optical path channel is separated and disconnected between the monochromator and the positioning carrier. The detector is mounted on the side wall of the integrating sphere to detect the illuminance.

[0010] Preferably, the guide rail frame includes a guide rail frame horizontally fixed on the inner wall of the optical path channel, and a limiting guide rail that corresponds to and cooperates with the side clamp assembly is fixed inside the guide rail frame; the side clamp assembly is slidably mounted on the limiting guide rail.

[0011] Preferably, each limiting guide rail is fixed with a locking hole block; the side wall of the support platform is fixed with a limiting block that corresponds to the locking hole block; the support platform is also equipped with a self-locking component that corresponds to the locking hole block; the locking hole block is provided with a locking hole that cooperates with the self-locking component; when the support platform rises to the point where the limiting block contacts the bottom end of the corresponding locking hole block, the self-locking component aligns with the corresponding locking hole.

[0012] Preferably, the support platform has sliding cavities that correspond one-to-one with the self-locking components, and the sliding cavities extend upward from the bottom end of the support platform; the side wall of the support platform has stepped holes that are horizontally connected to the sliding cavities; the self-locking components are assembled one-to-one in the stepped holes; the linkage assembly includes a multi-stage frame for lifting drive, and a drive rod that corresponds to the sliding cavity is fixed on the multi-stage frame. The drive rod has a clearance groove that mates with the self-locking component; when one end of the self-locking component extends into the clearance groove, the self-locking component moves out of the lock hole and is in an unlocked state; when one end of the self-locking component moves out of the clearance groove, the self-locking component is inserted into the lock hole and is in a locked state.

[0013] Preferably, the side wall of the support platform is also provided with stroke holes that are horizontally connected to the sliding cavity one by one; the stroke holes and stepped holes connected to the same sliding cavity are distributed vertically; each drive rod is fixed with a pull block that slides vertically along the corresponding stroke hole.

[0014] Preferably, the side clamp assembly includes a sliding seat that is horizontally slidably mounted on a limiting guide rail, a side clamping plate that is slidably mounted on the sliding seat along its sliding direction, and a compression spring connecting the side clamping plate and the sliding seat; the end of the limiting guide rail near the plugging part is a limiting end that restricts the sliding of the side clamping plate; each sliding seat is hinged to a connecting rod with the multi-stage frame.

[0015] Preferably, the side sleeve is provided with a sealing sleeve that is fitted onto the side clamp plate in a one-to-one correspondence; the sealing sleeve has at least one extension hole, the long side of the extension hole extends along the moving direction of the side clamp plate, and a push-pull pin that is slidably installed in the extension hole is fixed on the side clamp plate.

[0016] Preferably, there is a slit between adjacent edge sealing sleeves; when the side clamp is clamped with the front shell side wall, the slit is closed, and multiple edge sealing sleeves are clamped and sealed with the upper and lower edges of the front shell.

[0017] Preferably, the plugging component includes a central column vertically fixed to the upper end of the fixed beam, a central cylinder fixed to the top of the central column, and a sealing sleeve sleeved on the central cylinder; the sealing sleeve makes sealing contact with the central hole of the front shell; the support platform is slidably mounted on the central column by a key engagement.

[0018] Preferably, a return spring is fitted on the central column, and the two ends of the return spring are fixed to the support platform and the fixed beam, respectively.

[0019] The above technical solution has the following advantages or beneficial effects: This invention provides a performance testing device for automotive camera components, mainly targeting the light transmittance testing of the front shell of an automotive camera component. It optimizes and improves the design of the positioning carrier used for front shell positioning in the light transmittance testing system. The front shell employs center-assisted positioning, horizontal positioning support, and rigid-flexible synchronous clamping. A two-stage drive is used, prioritizing the stability and accuracy of the front shell's horizontal positioning through self-locking support and pre-clamping. Then, the front shell is positioned at the center of the side clamp under a limited state, and the support is unlocked and lowered for separation. Finally, the front shell achieves a centered horizontal positioning relative to the light source and is clamped with appropriate force to ensure the stability and repeatability of the test, avoiding positioning tilt and deformation of the front shell. Based on the horizontal positioning and side clamping fixation of the front shell, automatic avoidance of the light transmittance testing area is achieved, and effective light-shielding and sealing of the center hole and upper and lower edges of the side walls of the front shell are implemented to prevent light transmission through gaps. This effectively improves the accuracy of the front shell's light transmittance testing, avoids detection distortion and misjudgment, and reduces product waste caused by misjudgment. Attached Figure Description

[0020] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the spirit of the invention.

[0021] Figure 1 This is a 3D state diagram of a performance testing device for automotive camera components.

[0022] Figure 2 This is a three-dimensional structural diagram of the front shell of an automotive camera assembly.

[0023] Figure 3 It is a three-dimensional sectional view of the positioning vehicle.

[0024] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0025] Figure 5 It is a three-dimensional sectional view of the positioning vehicle from another perspective.

[0026] Figure 6 This is the bottom view of the positioning vehicle.

[0027] Figure 7 yes Figure 6 A cross-sectional view of BB.

[0028] Figure 8 It is a three-dimensional structural diagram of the fixed beam, plugging parts, and linkage components assembly.

[0029] Figure 9 This is a three-dimensional sectional view of the support platform.

[0030] Figure 10 This is a three-dimensional structural diagram of the side-wrapped rubber sleeve.

[0031] In the diagram: 1. Optical path channel; 11. Light source; 12. Monochromator; 13. Integrating sphere; 14. Detector; 2. Positioning carrier; 21. Fixed beam; 22. Plug; 221. Central column; 222. Central cylinder; 223. Sealing sleeve; 23. Support platform; 231. Sleeve hole; 232. Sliding cavity; 233. Stepped hole; 234. Stroke hole; 235. Limiting block; 236. Self-locking component; 24. Return spring; 25. Guide rail frame; 2 51. Guide rail frame; 252. Limiting guide rail; 253. Locking hole block; 26. Side clamp assembly; 261. Sliding seat; 262. Side clamping plate; 263. Push-pull pin; 264. Compression spring; 27. Linkage assembly; 271. Electric cylinder; 272. Multi-stage frame; 273. Drive rod; 274. Pull block; 275. Alternating groove; 276. Connecting rod; 28. Side rubber sleeve; 281. Edge sealing sleeve; 282. Fitting cavity; 283. Extension hole; 3. Front shell. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1 and Figure 2 As shown, a performance testing device for automotive camera components (hereinafter referred to as the testing device) is used to test the transmittance of the front housing 3 in an automotive camera component. Figure 2The image shows the front housing 3 of a certain model of automotive camera assembly. To test whether the front housing 3 meets the performance requirements of shielding visible light while maintaining high transmittance of the welding laser, it is necessary to test the transmittance of visible light and the laser used for welding. The front housing 3 shown in the figure is made of engineering plastic material, and the laser used for welding corresponds to the near-infrared band. Specifically, a semiconductor laser or a fiber laser can be selected for welding. It should be noted that during the test, the transmittance of visible light and the laser only needs to meet the corresponding performance range. For example, the transmittance of visible light should be less than 0.1%. The lower the transmittance, the higher the shielding effect of visible light, which is beneficial to ensuring image quality. The transmittance of the laser should not be less than 30%. A higher and more suitable transmittance is beneficial to ensuring welding quality.

[0035] like Figure 1 As shown, the detection device includes a vertically arranged cylindrical optical path channel 1. A light source 11, a monochromator 12, a positioning carrier 2, and an integrating sphere 13 are sequentially installed along the optical path channel 1 from top to bottom. The light source 11 and the integrating sphere 13 are respectively mounted at the top and bottom of the optical path channel 1, while the monochromator 12 and the positioning carrier 2 are mounted inside the optical path channel 1. It should be noted that the detection device provided by this invention can be installed in existing detection systems equipped with automated loading and unloading. To facilitate the automatic placement or removal of the front shell 3 from the optical path channel 1, the optical path channel 1 is divided into two separable sections. The design features a docking connection, with the disconnection point located between the monochromator 12 and the positioning carrier 2. The upper optical path channel 1 can be docked with and fitted with a lifting structure (not shown in the figure). The lifting structure includes a frame and a cylinder vertically fixed to the frame by bolts. The upper optical path channel 1 can be fixed to the output end of the cylinder via a connector. The lower optical path channel 1 can be fixed below the upper optical path channel 1 via a fixed bracket. The lifting structure allows for relative separation or docking closure of the two optical path channels 1. A black sealing gasket can be installed at the docking end of the two optical path channels 1 to prevent light leakage from gaps at the docking point.

[0036] like Figure 1 and Figure 2As shown, the light source 11 can be an existing coaxial integrated light source 11, which can switch between emitting white light and laser light required for detection, facilitating rapid scanning detection of the light source 11. In this embodiment, the light source 11 has a cylindrical structure and is embedded in the top of the optical path channel 1. The light source 11 and the inner wall of the optical path channel 1 are sealed with a gasket to block light. The optical path channel 1 is used to constrain and guide the beam to propagate downward. During the detection process, the intensity of ambient light is uncontrollable and is an important external interference factor. Therefore, the optical path channel 1 has high light-shielding properties to prevent ambient light from being projected into the channel, so as to provide a stable and controllable internal detection environment. Specifically, the optical path channel 1 can use stainless steel as the base material, and a light-shielding coating can be attached to the surface. It can also be further covered with black engineering plastic with sufficient carbon black or light-shielding agent as an outer layer. The light-shielding properties of the optical path channel 1 can be guaranteed by testing and verification by those skilled in the art.

[0037] During detection, the light source 11 can emit white light and near-infrared laser light. Considering that the material has different light transmittance for different wavelengths, in order to obtain true and objective transmittance data of the front shell 3 itself, the monochromator 12 can decompose the white light into monochromatic light of different wavelengths, thereby monochromating the light source 11 into monochromatic incident light, and realizing rapid scanning detection of multiple monochromatic lights. It should be noted that the monochromator 12 is an existing mature grating device. In this embodiment, the monochromator 12 has a cylindrical structure and is coaxially set with the light source 11. The monochromator 12 and the inner wall of the upper optical path channel 1 can be sealed with a gasket to block light.

[0038] like Figure 1 and Figure 2 As shown, the positioning carrier 2 is used for horizontal positioning of the front shell 3; the integrating sphere 13 is an existing mature device for transmitting light. When the incident light passes through the front shell 3, the transmitted light will be scattered. The integrating sphere 13 is a hollow sphere with its inner wall coated with a highly reflective material. The integrating sphere 13 collects the transmitted light and distributes it evenly on its inner wall; the integrating sphere 13 has a transmission window and a detection window. The transmission window is connected to the bottom end of the lower optical path channel 1, and the assembly at the connection point is light-proof; the detection window is located on the side wall of the integrating sphere 13 and avoids the transmission window. A detector 14 is fixed at the detection window, and the assembly position is also light-proof and sealed. In this embodiment, the detector 14 is specifically a photometer. The photometer is used to detect the uniform illuminance inside the integrating sphere 13 and complete the photoelectric conversion of the light signal into an electrical signal. Finally, it is converted into the total luminous flux of the transmitted light collected inside the integrating sphere 13 according to the calibration of the integrating sphere 13.

[0039] like Figure 3 , Figure 5 , Figure 7 and Figure 8As shown, the positioning carrier 2 includes a fixed beam 21 horizontally fixed to the inner wall of the optical path channel 1; a plugging component 22 coaxially arranged with the optical path channel 1 is mounted on the fixed beam 21; the plugging component 22 includes a central column 221 vertically fixed to the upper end face of the fixed beam 21 by screws, a central cylinder 222 fixed to the top of the central column 221 by screws, and a sealing sleeve 223 fitted on the central cylinder 222. The surface of the central cylinder 222 is coated with a light-shielding coating, and the center of the front shell 3 has a central hole for embedding and installing a lens. The sealing sleeve 223 is made of black rubber with added carbon black and light-shielding agent. The central cylinder 222 provides basic rigidity and sealing reliability. The central cylinder 222 is a cylindrical structure with an open top and a closed bottom to block light. Multiple contraction slits are evenly distributed around the central cylinder 222. The contraction slits extend downward from the top of the central cylinder 222, and the sealing sleeve 223 covers all the contraction slits.

[0040] like Figure 3 , Figure 5 , Figure 7 and Figure 9 As shown, a support platform 23 for horizontally positioning and supporting the front shell 3 is mounted on the central column 221. A sleeve hole 231 is vertically opened through the support platform 23 along the central axis. The support platform 23 is keyed and slidably mounted on the central column 221 through the sleeve hole 231. Four vertically extending sliding cavities 232 are opened at the bottom of the support platform 23, and the four sliding cavities 232 are evenly distributed around the central axis of the support platform 23. The side wall of the support platform 23 is provided with stroke holes 234, stepped holes 233 and limiting blocks 235 corresponding to the sliding cavities 232. The stroke holes 234, stepped holes 233 and limiting blocks 235 are distributed in sequence in the vertical direction. The stroke holes 234 and stepped holes 233 are horizontally connected to the corresponding sliding cavities 232. A return spring 24 is sleeved on the central column 221, and the upper and lower ends of the return spring 24 are fixed to the bottom end of the support platform 23 and the upper end of the fixing beam 21, respectively.

[0041] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, a guide rail frame 25 is provided above the fixed beam 21; the guide rail frame 25 includes a guide rail frame 251 horizontally fixed to the inner wall of the optical path channel 1, and four limiting guide rails 252 are welded inside the guide rail frame 251. The limiting guide rails 252 are radially arranged along the guide rail frame 251, and a locking hole block 253 is welded to one end of each limiting guide rail 252 near the center of the guide rail frame 251; the locking hole blocks 253 are distributed one-to-one above the limiting block 235, and the lower end face of the locking hole block 253 is... The limiting end face that cooperates with the limiting block 235; the limiting guide rail 252 is equipped with a corresponding side clamping assembly 26. The side clamping assembly 26 includes a sliding seat 261 that is horizontally slidably installed on the limiting guide rail 252. A side clamping plate 262 is slidably installed on the sliding seat 261 along its sliding direction. A compression spring 264 is fixedly connected between the side clamping plate 262 and the sliding seat 261. The end of the limiting guide rail 252 near the plugging hole 22 is the limiting end that restricts the sliding of the side clamping plate 262.

[0042] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 10 As shown, a side-mounted rubber sleeve 28 is provided above the guide rail frame 25. The edge of the side-mounted rubber sleeve 28 is glued and sealed to the inner wall of the optical path channel 1. The plugging part 22 is used to seal the edge of the central hole of the front shell 3 to block light, while the side-mounted rubber sleeve 28 is used to seal the side wall of the front shell 3 to block light, so as to avoid light leakage at the edges of the central hole and the side wall of the front shell 3, which would affect the accuracy of the detection. In this embodiment, the side-mounted rubber sleeve 28 and the plugging sleeve 223 are made of the same material and have light-blocking properties to reduce interference with the detection. It should be emphasized that neither the plugging sleeve 223 nor the side-mounted rubber sleeve 28 needs to have strict light-blocking properties. It is only necessary to ensure that the light transmittance of both is stable during the detection process. The key is to ensure the reliability of light blocking between the side-mounted rubber sleeve 28 and the inner wall of the optical path channel 1 and at the edge of the front shell 3 during the detection, that is, to avoid light leakage through gaps. Those skilled in the art can correct the reliability of light blocking after the equipment is assembled and perform periodic tests.

[0043] like Figure 3 , Figure 4 , Figure 8 and Figure 10As shown, the side sleeve 28 is provided with a sealing sleeve 281 that corresponds to and mates with the side clamping assembly 26. The sealing sleeve 281 has a fitting cavity 282, through which the sealing sleeve 281 is fitted onto the side clamping plate 262, and the side clamping plate 262 can extend out of the fitting cavity 282 in its moving direction. The sealing sleeve 281 has symmetrically provided extension holes 283 in a horizontal direction perpendicular to the side clamping plate 262. The two extension holes 283 communicate with the fitting cavity 282, and their length direction is along the moving direction of the side clamping plate 262. Push-pull pins 263 are horizontally and symmetrically welded to both sides of the side clamping plate 262, and each push-pull pin 263 extends into one of the extension holes 283. The extension holes 283 are positioned opposite to the side clamping plate 262. 62 provides a buffer transition section. When the side clamp 262 moves closer to the center of the optical path channel 1, after passing the transition section, the push-pull pin 263 contacts the side wall of the extension hole 283. As it continues to move, the side clamp 262 drives the edge sealing sleeve 281 to stretch and deform through the push-pull pin 263, and simultaneously moves closer to the center of the optical path channel 1. When the side clamp 262 moves back, the edge sealing sleeve 281 automatically resets under its own elastic force. In order to adapt to the push-pull deformation and avoid the contact end of the edge sealing sleeve 281 with the front shell 3, a slit is provided between adjacent edge sealing sleeves 281 to reserve space for compression deformation. In addition, compression slits are provided at the upper and lower ends of the edge sealing sleeve 281 to increase the compressible space.

[0044] The support platform 23 slides upward. When the limiting block 235 contacts the locking hole block 253, it reaches the maximum limit height, and the return spring 24 is still in a compressed state. The limiting block 235 and the locking hole block 253 are tightly attached. The purpose of limiting the height is that when the support platform 23 is at the maximum height position, the front shell 3 is placed on the support platform 23, and the clamping surface of the side clamping plate 262 is exactly located at the center of the thickness of the side wall to be clamped of the front shell 3, so that the sealing sleeve 281 can form a sealing contact with the upper and lower edges of the side wall of the front shell 3 to ensure the best light-proof sealing effect.

[0045] like Figure 4 , Figure 5 , Figure 7 and Figure 9 As shown, in order to further improve the stability of the support platform 23 when it is at its maximum height and avoid vertical displacement and horizontal positioning fluctuations, self-locking components 236 are installed in the stepped holes 233 one by one, and the self-locking components 236 and the locking hole blocks 253 are matched one by one. The self-locking component 236 includes a locking shaft that is slidably installed in the stepped hole 233. The locking shaft is a stepped cylindrical rod structure. A spring is sleeved on the locking shaft. The two ends of the spring are fixed to the locking shaft and the stepped surface of the stepped hole 233, respectively. A ball is movably embedded at the end of the locking shaft that extends into the sliding cavity 232. The locking hole block 253 has a locking hole for the locking shaft to be inserted and matched. When the support platform 23 is at its maximum height, the locking shaft and the locking hole are aligned one by one.

[0046] like Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the fixed beam 21 is equipped with a linkage assembly 27 that works in conjunction with the support platform 23 and the side clamp assembly 26. The linkage assembly 27 includes an electric cylinder 271 fixed to the bottom of the fixed beam 21 via a fixed seat. The electric cylinder 271 is a conventional miniature electric push rod. The output end of the electric cylinder 271 is equipped with a multi-stage frame 272. The multi-stage frame 272 includes a horizontal plate that is bolted to the output end of the electric cylinder 271. Two uprights are vertically welded to the upper end of the horizontal plate. A hinge seat is fixed between the tops of the two uprights by screws. A return spring 24 passes through the hinge seat. Each of the four sliding seats 261 is hinged to a connecting rod 276. The horizontal cross-sectional profile of the sliding cavity 232 is square. Four drive rods 273 are vertically welded to the upper end of the base. The drive rods 273 are square rods, and each drive rod 273 slides in a corresponding manner with the sliding cavity 232. Each drive rod 273 is horizontally fixed with a pull block 274 by screws. The pull block 274 extends into the adjacent stroke hole 234, and the pull block 274 slides vertically in a corresponding manner with the stroke hole 234. A clearance groove 275 is provided on the side wall of the drive rod 273 facing the stepped hole 233. The clearance groove 275 and the side wall of the drive rod 273 below form a smooth arc transition. The clearance groove 275 is used to cooperate with the self-locking component 236 to achieve automatic unlocking. The self-locking component 236 uses spring force to keep the ball in rolling contact with the side wall of the drive rod 273.

[0047] When the testing equipment is in its initial state, the support platform 23 is at its maximum height, the side clamping assembly 26 is at its maximum distance from the center of the optical path channel 1, the side rubber sleeve 28 is not actively stretched by the side clamping plate 262, and the window size between the four edge sealing sleeves 281 is significantly larger than the size of the front shell 3. In addition, the drive rod 273 is also at its highest position, one end of the ball of the self-locking component 236 is not in the clearance groove 275, and under the contact of the side wall of the drive rod 273, the locking shaft of the self-locking component 236 is inserted into the lock hole and is in a locked state.

[0048] Before testing, a baseline value test of the luminous flux of the testing equipment is required. This baseline test is to determine the true luminous flux value after system losses due to partial absorption, etc. Subsequent tests are based on this baseline value. In a stable testing system, system losses are considered constant. Since the side sleeve 28 is not stretched initially, it undergoes tensile deformation when the front shell 3 is clamped and sealed. This changes both the coverage area and thickness of the side sleeve 28. The system environment changes before and after testing. To obtain a reliable baseline value for luminous flux, an optical standard component can be used instead of the front shell. 3. Perform reference value calibration. The optical standard has the same central hole structure and side wall contour as the front shell 3. Theoretically, it is best to use an optical standard with 100% transmittance for calibration. However, considering that the transmittance of materials in reality cannot be absolutely 100%, an optical standard with known transmittance can be used for calibration. During calibration, the optical standard is tested in the same positioning and clamping state as the front shell 3, which can eliminate the error caused by changes in the system environment. The luminous flux of the measured projected light is divided by the known transmittance of the optical standard to obtain the actual luminous flux reference value. It should be noted that the luminous flux reference value is an array, corresponding to the luminous flux reference values ​​of different bands of white light and near-infrared laser.

[0049] During testing, in the automated testing system, the front shell 3 is automatically conveyed by the feeding conveyor mechanism. When it is conveyed to the gripping fixed position, the lifting structure of the optical path channel 1 responds accordingly, the optical path channel 1 opens, and the front shell 3 can be automatically placed on the support platform 23 by the gripping robot. The hole plug 22 passes through the center hole of the front shell 3. The support platform 23 is used to horizontally position the front shell 3, while the hole plug 22 can perform center auxiliary positioning of the front shell 3.

[0050] Subsequently, the electric cylinder 271 is activated, driving the multi-stage frame 272 to descend. The descent can be divided into two processes. In the first stage of descent, the support platform 23 is initially locked. The multi-stage frame 272 drives the drive rod 273 to slide down along the sliding cavity 232. The pull block 274 descends synchronously with the drive rod 273, while the balls of the self-locking component 236 roll relative to the relief groove 275. When the pull block 274 descends to the lower inner wall of the stroke hole 234 and makes overlapping contact, one end of the self-locking component 236 moves into the relief groove 275 and completely moves out of the locking hole, completing the self-locking process. When the machine unlocks, the multi-stage frame 272 pulls the sliding seat 261 through the connecting rod 276, causing the side clamping assembly 26 to move along the limiting guide rail 252 towards the center of the optical path channel 1. After the push-pull pin 263 passes the transition section of the extension hole 283, the side clamping plate 262 drives the sealing sleeve 281 to stretch and move through the two push-pull pins 263, so that the sealing sleeve 281 forms a surrounding pre-clamping on the side wall of the front shell 3. The pre-clamping force maintains the horizontal placement posture of the front shell 3. At this time, the side clamping plate 262 does not contact the side wall of the front shell 3.

[0051] During the second descent, on one hand, the drive rod 273 and the pull block 274 continue to descend with the multi-stage frame 272. The pull block 274 pulls the support platform 23 down at the stroke hole 234, causing the support platform 23 to disengage from the bottom of the front shell 3, thus actively avoiding the light-transmitting detection area of ​​the front shell 3 and preventing the light-transmitting area of ​​the front shell 3 from being covered. On the other hand, based on the pre-clamping of the side wall of the front shell 3 by the side rubber sleeve 28, in order to continue to maintain the horizontality of the front shell 3's placement posture, the connecting rod 276 further pulls the side clamping assembly 26 closer to the center of the optical path channel 1. The side clamping plate 262 gradually passes through the sleeve cavity 282 until the side clamping plate 262 moves to be close to the limiting end of the limiting guide rail 252. The clamping plate 262 is in rigid contact with the side wall of the front shell 3. During this process, the plugging part 22 uses a flexible sealing sleeve 223 to seal the contact, and the central cylinder 222 is provided with a contraction groove. This, combined with the lateral clamping of the side clamping plate 262, allows the front shell 3 to adaptively adjust its center position. The front shell 3 is ultimately positioned horizontally and centered in the optical path channel 1. It should be noted that, through side clamping tests, when the side clamping plate 262 is in the limit position, it can provide effective lateral clamping force to the front shell 3 to ensure the stability of the placement posture. However, the lateral clamping force is insufficient to cause lateral deformation of the front shell 3, so as to avoid affecting the accuracy of the transmittance detection. At the same time, it avoids affecting the assembly accuracy of the front shell 3 in subsequent use due to improper detection operation. The edge sealing sleeve 281 is further compressed with the side wall of the front shell 3, and the opening between adjacent edge sealing sleeves 281 is completely clamped and closed. The four edge sealing sleeves 281 together form a seal with the upper and lower edges of the front shell 3 to prevent incident light from passing through the gaps.

[0052] After the front shell 3 is clamped and positioned, the light source 11 quickly switches between white light and laser light, and the monochromator 12 converts the white light into monochromatic light, so that light of different wavelengths is projected through the front shell 3 in a rapid scanning manner. The light is collected by the integrating sphere 13 and detected by the detector 14 to obtain the luminous flux of the front shell 3 under different wavelengths of light projection. The transmittance corresponding to visible light and laser light is automatically calculated by the background computing device and compared with the performance range set in the detection system. When both the visible light transmittance and the laser transmittance meet the performance range requirements, the front shell 3 can be determined to be a qualified product in terms of transmittance. If either the visible light transmittance or the laser transmittance does not meet the performance range requirements, the transmittance of the front shell 3 can be determined to be unqualified.

[0053] After the test is completed, the optical path channel 1 is reopened, the support platform 23 is reset, and the front shell 3 is released. The gripping robot takes out the front shell 3 and places it in the position to be transported. According to the test results, the front shell 3 is transported and collected separately as qualified and unqualified products. It should be added that during the resetting process of the positioning carrier 2, the electric cylinder 271 drives the multi-stage frame 272 to rise, the pull block 274 rises synchronously with the drive rod 273, the reset spring 24 is gradually released, and the support platform 23 is lifted by the elastic force of the reset spring 24, so that the pull block 274 always overlaps the lower end of the stroke hole 234 during the initial rising process, and the self-locking component 236 is in the unlocked state until the support platform 23 rises to the maximum limit height. At this time, the side clamp 262 disengages from the side wall of the front shell 3, but the edge sealing sleeve 281 remains in a tight state. Subsequently, the support platform 23 maintains the maximum height, the drive rod 273 continues to rise and touches the self-locking component 236 to complete the self-locking, while the edge sealing sleeve 281 disengages from the side wall of the front shell 3, and the positioning carrier 2 is completely reset.

[0054] Transmittance testing is a common performance test for optical components. Its calculation method is based on existing standards and algorithms, which will be briefly introduced below without going into detail.

[0055] Light transmittance refers to the ratio of light flux passing through a material to light flux incident on the material. In this embodiment, the light flux incident on the material refers to the total light flux detected when the front shell 3 is subjected to a benchmark test, while the light flux passing through the material refers to the light flux passing through the front shell 3. Different wavelengths of light correspond to different transmittances. The transmittance of near-infrared laser light directly corresponds to the transmittance of that wavelength. Visible light is composed of multiple wavelengths, and the transmittance of visible light can be calculated by weighted fitting according to CIE specifications. The calculation formula is available.

[0056] This invention provides a performance testing device for automotive camera components, primarily targeting the light transmittance testing of the front housing 3 in an automotive camera component. The device optimizes and improves the positioning carrier 2 used for positioning the front housing 3 in the light transmittance testing system. The front housing 3 employs center-assisted positioning, horizontal positioning support, and rigid-flexible synchronous clamping, using a two-stage drive. Self-locking support and pre-clamping are used to prioritize the stability and accuracy of the front housing 3's horizontal positioning. Then, the front housing 3 is positioned at the center of the side clamp under a limited state, and the support is unlocked and lowered for separation. Finally, the front housing 3 achieves a centered horizontal positioning relative to the light source 11 and is clamped with appropriate force to ensure the stability and repeatability of the test, avoiding positioning tilt and deformation of the front housing 3. Based on the horizontal positioning and side clamping fixation of the front housing 3, automatic avoidance of the light transmittance testing area is achieved, and effective light-blocking and sealing are applied to the center hole and the upper and lower edges of the side walls of the front housing 3 to prevent light transmission through gaps. This effectively improves the accuracy of the light transmittance testing of the front housing 3, avoids detection distortion and misjudgment, and reduces product waste caused by misjudgment.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A performance testing device for automotive camera components, used to test the transmittance of the front housing in an automotive camera component, characterized in that, include: Optical path channel; light source; A monochromator, located within the optical path, is used to monochromate the light source into monochromatic incident light. The positioning carrier, assembled within the optical path channel, comprises a side-insulated rubber sleeve, a guide rail frame, and a fixed beam, which are sequentially and fixedly distributed on the inner wall of the optical path channel. A plugging component for sealing the center hole of the front housing is fixed to the upper end of the fixed beam. A vertically sliding and elastically reset support platform is fitted onto the plugging component, used for horizontally placing the front housing. Multiple side-clamping assemblies, fitted with side-insulated rubber sleeves, are horizontally slidably mounted on the guide rail frame. The guide rail frame can limit the side clamping of the side clamping assemblies and vertically limit the support platform. A linkage component, which drives and cooperates with the support platform and the side clamping assemblies, is mounted on the fixed beam. When the support platform rises to the guide rail frame's limit height, it locks into the guide rail frame. When the linkage component drives the side clamping assemblies to clamp the front housing, the side clamping assemblies first drive the side-insulated rubber sleeves to pre-clamp the side wall of the front housing. Then, the support platform unlocks and descends, disengaging from the front housing, simultaneously moving the side clamping assemblies to the guide rail frame's limit position and clamping them against the side wall of the front housing. The integrating sphere and the light source are respectively mounted at both ends of the optical path channel to collect the transmitted light transmitted through the front shell and form a uniform illuminance; the light source, monochromator, positioning carrier and integrating sphere are vertically arranged in sequence, and the optical path channel is separated and disconnected between the monochromator and the positioning carrier. And a detector, mounted on the sidewall of the integrating sphere, is used to detect illuminance.

2. The automotive camera component performance testing equipment according to claim 1, characterized in that: The guide rail frame includes a guide rail frame horizontally fixed on the inner wall of the optical path channel, and a limiting guide rail that corresponds to and cooperates with the side clamping assembly is fixed inside the guide rail frame; the side clamping assembly is slidably installed on the limiting guide rail.

3. The automotive camera component performance testing equipment according to claim 2, characterized in that: Each limit guide rail is fixed with a locking hole block; the side wall of the support platform is fixed with a limit block that corresponds to the locking hole block; the support platform is also equipped with a self-locking component that corresponds to the locking hole block; the locking hole block has a locking hole that mates with the self-locking component; when the support platform rises to the point where the limit block contacts the bottom of the corresponding locking hole block, the self-locking component aligns with the corresponding locking hole.

4. The automotive camera component performance testing device according to claim 3, characterized in that: The support platform has sliding cavities that correspond one-to-one with the self-locking components, and the sliding cavities extend upward from the bottom end of the support platform; the side wall of the support platform has stepped holes that are horizontally connected to the sliding cavities; the self-locking components are assembled one-to-one in the stepped holes; the linkage component includes a multi-stage frame for lifting drive, and a drive rod that corresponds to the sliding cavity is fixed on the multi-stage frame. The drive rod has a clearance groove that mates with the self-locking component; when one end of the self-locking component extends into the clearance groove, the self-locking component moves out of the lock hole and is in an unlocked state; when one end of the self-locking component moves out of the clearance groove, the self-locking component is inserted into the lock hole and is in a locked state.

5. The automotive camera component performance testing device according to claim 4, characterized in that: The support platform sidewall is also provided with stroke holes that are horizontally connected to the sliding cavity; the stroke holes and stepped holes connected to the same sliding cavity are distributed vertically; each drive rod is fixed with a pull block that slides vertically along the corresponding stroke hole.

6. The automotive camera component performance testing device according to claim 4, characterized in that: The side clamp assembly includes a sliding seat that is horizontally slidably mounted on a limiting guide rail. A side clamping plate is slidably mounted on the sliding seat along its sliding direction. A compression spring connects the side clamping plate and the sliding seat. The end of the limiting guide rail near the plugging part is a limiting end that restricts the sliding of the side clamping plate. Each sliding seat is hinged to a connecting rod with the multi-stage frame.

7. The automotive camera component performance testing device according to claim 6, characterized in that: The side-covered rubber sleeve is provided with a sealing sleeve that is fitted onto the side clamp plate in a one-to-one correspondence; the sealing sleeve has at least one extension hole, the long side of the extension hole extends along the moving direction of the side clamp plate, and a corresponding push-pull pin is fixed on the side clamp plate and slidably installed in the extension hole.

8. The automotive camera component performance testing device according to claim 7, characterized in that: There is a slit between adjacent edge sealing sleeves; when the side clamp is clamped with the front shell side wall, the slit is closed, and multiple edge sealing sleeves are clamped and sealed with the upper and lower edges of the front shell.

9. The automotive camera component performance testing device according to claim 1, characterized in that: The plugging component includes a central column vertically fixed to the upper end of the fixed beam, a central cylinder fixed to the top of the central column, and a plugging sleeve sleeved on the central cylinder; the plugging sleeve makes plugging contact with the central hole of the front shell; the support platform is slidably installed on the central column by key engagement.

10. The performance testing equipment for an automotive camera assembly according to claim 9, characterized in that: A return spring is fitted onto the central column, with its two ends fixed to the support platform and the fixed beam, respectively.

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