Camera module distortion center offset testing device

Abstract

The invention relates to the field of camera detection, and particularly discloses a camera module distortion center offset testing device, which comprises a mounting seat, a camera module and a detection device, the power part is mounted on the mounting seat; the rotating platform is connected with the power part and is driven by the power part to rotate; and the jig assembly is in butt joint with the rotating platform and is used for fixing a camera module. The technical scheme has the beneficial effects that the jig assembly of the system adopts a multi-station independent fixing design, a plurality of camera modules can be arranged on the jig plate at the same time, and each camera module is independently fixed, so that mutual interference among the modules in the testing process is avoided, and parallel testing of the plurality of modules is realized; the quality inspection efficiency of the production line is greatly improved, and the high-efficiency test requirement in a large-batch production scene is met. The rotating platform is kept in a constant-speed and stable state in the rotating process, and image acquisition deviation caused by shaking and jamming is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of camera detection, in particular to a camera module distortion center offset testing device. BACKGROUND

[0002] In the camera module assembly production process, the Sensor image sensor center is usually aligned with the Lens lens center, also known as OC (Optical center) alignment and monitoring measurement, that is, the image center presents the best brightness and resolution at this time. When the center brightness and resolution reach the best state, the picture stretching and compression proportion of each corner around the image is not the same due to the optical distortion of the optical lens. Although adjusting the OC can slightly correct the COD (Center of distortion), but there is still a difference between the OC and the COD, the OC cannot represent whether the distortion center is offset, and the OC cannot represent the three-dimensional world coordinate point. Therefore, it is necessary to test the offset of the distortion center of the camera module, and a large number of standard images need to be taken at multiple angles during testing, and the camera module needs to be adjusted at multiple accurate angles. SUMMARY

[0003] The purpose of the present application is to provide a camera module distortion center offset testing device that can simultaneously test multiple camera modules synchronously.

[0004] The technical solution provided by the present application is: a camera module distortion center offset testing device, comprising: a mounting seat; a power component installed on the mounting seat; a rotating platform connected with the power component and rotating under the drive of the power component; a jig assembly connected to the rotating platform for fixing the camera module.

[0005] The beneficial effects of the above technical solution are: the jig assembly of the present system adopts a multi-station independent fixing design, multiple camera modules can be arranged on the jig plate at the same time, and each camera module is independently fixed, avoiding mutual interference between the modules during testing, and realizing parallel testing of multiple modules; greatly improving the quality inspection efficiency of the production line, meeting the high-efficiency testing demand in large-batch production scenarios. The rotating platform maintains a uniform and stable state during rotation, avoiding image acquisition deviation caused by shaking and lag.

[0006] Further, the mounting seat comprises a bottom plate and a support arm, the support arm is fixed on the bottom plate, the support arm comprises a vertical section and a horizontal section, and the horizontal section is connected to the top end of the vertical section.

[0007] Further, an installation groove is formed on the horizontal section, and the power component is arranged in the installation groove.

[0008] Further, the power component comprises a motor arranged along the length direction of the horizontal section, and the rotating shaft of the motor extends out of the end of the horizontal section.

[0009] Further, the geometric center of the rotating platform is connected with the rotating shaft, and an assembly hole is arranged at the geometric center of the rotating platform, and a bearing connected with the rotating shaft is arranged in the assembly hole.

[0010] Further, the jig assembly comprises a jig plate, and the jig plate is arranged with jigs for placing the camera modules, each camera module is independently fixed, and a space is left between adjacent camera modules, and the jig plate and the rotating platform are arranged in parallel and with a space left.

[0011] Further, the jig plate is arranged with holes for penetrating data lines, and the number and positions of the holes correspond to the fixed camera modules one by one. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is an exploded view of the embodiment of the present application; Figure 2 It is a structural schematic view of an angle of the embodiment of the present application; Figure 3 It is a structural schematic view of another angle of the embodiment of the present application; Figure 4 It is a structural schematic view of the embodiment of the present application after removing the main plate; Figure 5 It is a connection schematic view of the power component and the rotating platform in the embodiment of the present application; Figure 6 It is a schematic view of the jig in the embodiment of the present application; Figure 7 It is a circuit connection diagram of the embodiment of the present application.

[0013] The reference signs are as follows: bottom plate 100, vertical section 200, horizontal section 210, mounting groove 211, main plate 300, motor 400, power line 410, rotating platform 500, bearing 510, jig plate 600, support rod 610, fixed frame 620, clamping groove 621, through hole 622, camera module 700, data line 710. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0015] AsFigures 1-7 As shown, the embodiment provides a camera module distortion center offset test device, which comprises a mounting seat, a power component, a rotating platform 500 and a jig assembly. The power component is mounted on the mounting seat, and the mounting seat is used to support additional components and ensure the structural stability of the whole. The rotating platform 500 is connected with the power component and rotates under the driving of the power component; and the jig assembly is connected with the rotating platform 500 and is used to fix the camera module 700.

[0016] The jig assembly of the system adopts a multi-station independent fixing design. A plurality of camera modules 700 can be arranged on the jig plate 600 at the same time, and each camera module 700 is independently fixed, thereby avoiding mutual interference between the modules during the test and realizing parallel test of multiple modules. The production line quality inspection efficiency is greatly improved, and the efficient test demand in the large-batch production scene is met. The rotating platform 500 maintains a uniform and stable state during rotation, thereby avoiding image acquisition deviation caused by shaking and lag.

[0017] In some embodiments, the mounting seat comprises a bottom plate 100 and a support arm fixed on the bottom plate 100. Fixed holes are configured on the bottom plate 100 near the four corners, and the bottom plate 100 can be fixed by passing bolts through the fixed holes. The support arm comprises a vertical section 200 and a horizontal section 210, and the horizontal section 210 is connected with the top end of the vertical section 200. The connection part of the horizontal section 210 and the vertical section 200 is arc transitioned to avoid stress concentration. Further, the vertical section 200 can be an I-beam, and the horizontal section 210 can also be an I-beam. An installation groove 211 is configured on the horizontal section 210 and is used to install the power component. If the horizontal section 210 is made of an I-beam, the installation groove 211 is a structural groove provided on the I-beam. If the horizontal section 210 is not an I-beam, the installation groove 211 can be machined, and the installation groove 211 is open upward to facilitate installation of the power component.

[0018] In some embodiments, the power component comprises a motor 400 fixed in the installation groove 211, preferably fixed at the bottom of the installation groove 211. The motor 400 is arranged along the length direction of the horizontal section 210, and the rotating shaft of the motor 400 extends out of the end of the horizontal section 210. This makes the motor 400 in a horizontal state after installation and fixation, and the rotating platform 500 is fixed on the rotating shaft of the motor 400, and the rotating shaft is perpendicular to the rotating platform 500. This makes the rotating platform 500 maintain a vertical state and rotate around the axis of the motor 400. During the test, the rotating platform 500 and the standard pattern to be photographed are parallel to each other to ensure that each camera module 700 on the rotating platform 500 can normally photograph the standard pattern. Further, in order to improve the accuracy of the rotation of the motor 400, the motor 400 is preferably a stepping motor 400 or a reduction motor 400. The tail of the motor is connected with a power source through a power line 410.

[0019] In some embodiments, the rotating platform 500 is rectangular, and its geometric center aligns with a rotating shaft. Furthermore, a mounting hole is provided at the geometric center of the rotating platform 500, and a bearing 510, which is connected to the rotating shaft, is installed within the mounting hole to ensure smooth rotation of the rotating platform 500. The mounting hole can be a blind hole after ensuring that the bearing 510 is inserted into the rotating platform 500.

[0020] In some embodiments, the fixture assembly includes a fixture plate 600 on which a fixture for placing camera modules 700 is arranged. Each camera module 700 is independently fixed, leaving a gap between adjacent camera modules 700. The gap between the fixture plate 600 and the rotating platform 500 is specifically achieved by connecting support rods 610 between the fixture plate 600 and the rotating platform 500. The fixture plate 600 and the rotating platform 500 are relatively parallel. There can be four support rods 610, each connected to one of the four corners of the fixture plate 600, and the four support rods 610 are of the same length. The gap between the fixture plate 600 and the rotating platform 500 facilitates the routing of data cables 710 for the camera modules 700, and the fixture plate 600 has holes for the data cables 710 to pass through. See also... Figure 6 The upper fixture does not have a camera module installed, while the lower fixture does. The fixture includes a fixed frame 620, within which a rectangular groove is defined for fixing the camera module. A recessed slot 621 is provided near the bottom of the groove, close to the bottom of the fixed frame 620. The connector of a data cable 710 is fixed within the slot 621, and a through hole 622 is formed at the bottom of the slot 621 for the data cable 710 to pass through.

[0021] In some embodiments, a motherboard 300 is included, which is equipped with a data conversion chip, a computing chip, multiple data interfaces, and a power output interface. The data interfaces include a first data interface that connects to a camera module 700, and the number of first data interfaces is consistent with the number of camera modules 700 that can be mounted on the fixture assembly. That is, each camera module 700 under test is independently connected to the motherboard 300, allowing for individual testing and verification of each camera module 700. After the camera module 700 under test is fixed to the fixture, the data cable 710 of each camera module 700 passes through holes in the fixture plate 600 and connects to the first data interface on the motherboard 300. The space between the fixture plate 600 and the rotating platform 500 facilitates the organization of all the data cables 710, preventing them from tangling. Furthermore, the motherboard 300 is fixed on the horizontal section 210 of the support arm and located directly above the motor 400, making the space more compact and the installation more convenient.

[0022] See Figure 7The circuitry mainly consists of power management, a sensor, and a serial / decoder section. The power management section primarily steps down and filters the external 12V power supply, splitting it into various voltage stages. The sensor section converts the image optical signals into electrical digital signals and outputs the image and video data via the MIPI D-PHY interface. The serial / decoder section converts the MIPI D-PHY data into serial port SION and SIOP signals. This signal transmission distance is much greater than MIPI and USB interface data; serial signal data can be transmitted 10-15 meters. Finally, these signals are processed by a computer to determine the test performance of the camera module. The sensor is the camera module under test.

[0023] In the description of this application, it should be understood that the terminology used is for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0024] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A device for testing the distortion center offset of a camera module, characterized in that, include: Mounting base; The power unit is mounted on the mounting base; A rotating platform is connected to the power component and rotates under the drive of the power component; A fixture assembly is attached to the rotating platform for fixing the camera module.

2. The camera module distortion center offset testing device according to claim 1, characterized in that, The mounting base includes a base plate and a support arm. The support arm is fixed to the base plate and includes a vertical section and a horizontal section. The horizontal section is connected to the top of the vertical section.

3. The camera module distortion center offset testing device according to claim 2, characterized in that, A mounting groove is constructed on the horizontal section, and the power component is arranged in the mounting groove.

4. A camera module distortion center offset testing device according to claim 2 or 3, characterized in that, The power unit includes a motor arranged along the length of the horizontal section, with the motor shaft extending out of the end of the horizontal section.

5. The camera module distortion center offset testing device according to claim 4, characterized in that, The geometric center of the rotating platform is connected to the rotating shaft. An assembly hole is provided at the geometric center of the rotating platform, and a bearing connected to the rotating shaft is installed in the assembly hole.

6. The camera module distortion center offset testing device according to claim 1, characterized in that, The fixture assembly includes a fixture plate on which fixtures for placing the camera modules are arranged. Each camera module is fixed independently, and there is a gap between adjacent camera modules. The fixture plate and the rotating platform are arranged in parallel with a gap between them.

7. The camera module distortion center offset testing device according to claim 6, characterized in that, The fixture plate has holes for data cables to pass through, and the number and position of the holes correspond one-to-one with the fixed camera modules.

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