Mechanism for testing performance index of mobile phone camera through high-precision vibration table

Abstract

The invention discloses a high-precision vibration table mobile phone camera performance index testing mechanism, which comprises a base, a rotating and swinging module and a light source module, and is characterized in that the rotating and swinging module is in sliding connection with the base through a sliding assembly, and the rotating and swinging module is used for placing a mobile phone and overturning and swinging the mobile phone; the light source module is movably arranged above the base and provides a test light source so as to ensure that the center of a camera of the mobile phone is aligned with the test light source; high-precision adjustment of the mobile phone within the rotation angle range of 0.1-8 degrees and the swing frequency range of 1-8 Hz is achieved mainly through the first DD motor and the second DD motor, the swing support is arranged by 45 degrees relative to the fixed support, so that the mobile phone can do composite reciprocating motion in the X-axis direction and the Y-axis direction, and the mobile phone can be adjusted more accurately. And the light source of the light source assembly is photographed to judge the anti-shake performance of the mobile phone.

Description

Technical Field

[0001] The present invention relates to the technical field of testing equipment, and in particular to a mechanism for testing the performance indicators of a mobile phone camera with a high-precision vibration table. Background Art

[0002] OIS optical image stabilization camera is an imaging technology that reduces shooting jitter through a physical compensation mechanism, and is widely used in smartphones, digital cameras, and professional imaging equipment. Its core principle is to detect device jitter in real time through a gyroscope sensor, calculate the compensation displacement amount in combination with a microprocessor, and drive the lens group or image sensor to move in the opposite direction to offset the optical path offset caused by jitter, thereby significantly improving the imaging clarity in low shutter speed or moving scenarios.

[0003] In the prior art, testing the OIS anti-shake device generally uses a vibration slide table, a servo module lead screw, and a controller to match each other. The vibration slide table rotates with a certain angle and a certain frequency to provide a certain swing amplitude and shaking test environment. The OIS optical image stabilization camera combines algorithms and gyroscope sensors for offsetting the swing amplitude to keep the picture stable in this environment, and detects the quality of its photographing effect, indirectly reflecting the performance indicators of the product camera. However, in the above technology, it is impossible to adjust the swing amplitude and swing frequency of the vibration slide table, and it is difficult to perform tests under different vibration conditions. Therefore, there is an urgent need for a more reasonable OIS camera detection mechanism to solve the above technical problems. Summary of the Invention

[0004] In view of the deficiencies in the above technology that the swing frequency and angle of the anti-shake detection mechanism cannot be accurately adjusted, the present invention provides a mechanism for testing the performance indicators of a mobile phone camera with a high-precision vibration table.

[0005] To achieve the above object, the present invention provides a mechanism for testing the performance indicators of a mobile phone camera with a high-precision vibration table, including a base, a rotary swing module, a light source module, and a sliding component. An installation bracket is provided on the base. The rotary swing module is slidably connected to the base through the sliding component. The rotary swing module is used to place the mobile phone and perform flipping and swinging on the mobile phone. The light source module is movably arranged on the installation bracket. The light source module provides a test light source to ensure that the center of the camera of the mobile phone is aligned with the test light source. During operation, the rotary swing module moves to a position opposite to the light source module through the sliding component, and the rotary swing module is activated to rotate and swing the mobile phone.

[0006] As an improved solution of the present invention, the rotation and swing module includes a base, a first DD motor, a swing bracket and a fixed bracket. The base is fixedly arranged on the sliding assembly. The first DD motor is fixedly arranged on one side of the base. The two ends of the swing bracket are respectively rotationally connected to the output end of the first DD motor and the end of the base far from the first DD motor through swing bearings. At least one fixed bracket is arranged on the swing bracket for fixing the mobile phone.

[0007] As an improved solution of the present invention, at least one second DD motor is further arranged on the swing bracket, and the output end of any one second DD motor is rotationally connected to the fixed bracket.

[0008] As an improved solution of the present invention, the sliding assembly includes a retracting cylinder, a sliding track, a chassis and a connecting piece. The base is fixedly arranged on the chassis. The chassis is slidably arranged on the sliding track through a sliding block. The working end of the retracting cylinder is fixedly connected to the chassis through the connecting piece. The retracting cylinder contracts to drive the chassis to displace.

[0009] As an improved solution of the present invention, the light source module includes a test light source board, a synchronous belt, synchronous pulleys, transmission rods, an adjusting handwheel and a measuring scale. At least two synchronous pulleys are respectively arranged on two opposite brackets of the mounting bracket and are connected by the synchronous belt. One ends of at least two transmission rods are respectively coaxially connected to the synchronous pulleys, and the other ends sequentially pass through the mounting bracket and the test light source board and are coaxially connected to the adjusting handwheel. The measuring scale is fixedly arranged on the mounting bracket for measuring the displacement distance of the test light source board.

[0010] As an improved solution of the present invention, the swing bracket is arranged at 45 degrees relative to the fixed bracket.

[0011] As an improved solution of the present invention, the rotation angle range of the first DD motor is from 0.1° to 8°, and the swing frequency range is from 1 Hz to 8 Hz.

[0012] As an improved solution of the present invention, the rotation adjustment range of the first DD motor is from 0 to 1.5°, and the swing frequency adjustment range is 1 Hz.

[0013] As an improved solution of the present invention, an auxiliary bearing and an auxiliary bracket are further arranged on one side of the sliding track. The auxiliary bracket is fixedly connected to the sliding track. The auxiliary bearing is slidably sleeved on the auxiliary bracket and contacts the chassis.

[0014] As an improved solution of the present invention, at least one fixed cylinder and a fixed clamping block are provided on the fixed bracket. The output end of the fixed cylinder is fixedly connected to the fixed clamping block. When the fixed cylinder expands and contracts, the fixed clamping block squeezes the mobile phone.

[0015] The beneficial effects of the present invention are as follows: Compared with the prior art, a mechanism for testing the performance indicators of a mobile phone camera with high precision provided by the present invention includes a base, a rotating and swinging module, and a light source module. The rotating and swinging module is slidably connected to the base through a sliding component. The rotating and swinging module is used to place the mobile phone and perform flipping and swinging on the mobile phone. The light source module is movably arranged above the base, and the light source module provides a test light source to ensure that the center of the camera of the mobile phone is aligned with the test light source. During operation, the rotating and swinging module moves to a position opposite to the light source module through the sliding component, and the rotating and swinging module is activated to rotate and swing the mobile phone. The present invention mainly realizes high-precision adjustment of the mobile phone within the rotation angle range of 0.1° to 8° and the swinging frequency range of 1 Hz to 8 Hz through the first DD motor and the second DD motor, and the swinging bracket is arranged at 45° relative to the fixed bracket, so that the mobile phone can perform compound reciprocating motion in two directions of the X-axis and the Y-axis, and take pictures of the light source of the light source component to judge the anti-shake performance of the mobile phone. Description of the Drawings

[0016] Figure 1 is a three-dimensional view of the present invention; Figure 2 is a schematic diagram of the rotating and swinging module of the present invention; Figure 3 is a schematic diagram of the light source module of the present invention; Figure 4 is a schematic diagram of the fixed bracket of the present invention; Figure 5 is a diagram of the sliding component of the present invention.

[0017] The main component symbols are explained as follows: 1. Base; 2. Rotating and swinging module; 21. Base; 22. First DD motor; 23. Swinging bracket; 24. Fixed bracket; 25. Second DD motor; 26. Swinging bearing; 3. Sliding component; 31. Chassis; 32. Tensioning cylinder; 33. Sliding track; 34. Sliding block; 35. Connecting piece; 4. Light source module; 41. Test light source board; 42. Synchronous belt; 43. Synchronous pulley; 44. Transmission rod; 45. Adjusting handwheel; 46. Measuring scale; 5. Auxiliary bearing; 6. Auxiliary bracket; 7. Fixed cylinder; 8. Fixed clamping block; 9. Mounting bracket; 10. Limit block. Detailed Embodiments

[0018] In order to describe the present invention more clearly, the present invention will be further described below with reference to the drawings.

[0019] In the following description, specific details of the examples are given to provide a deeper understanding of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. It should be understood that the specific embodiments are only used to explain the present invention, and are not used to limit the present invention.

[0020] It should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of the described features, wholes, steps, operations, elements or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components or their combinations.

[0021] Please refer to Figures 1-5 , a mechanism for testing the performance indicators of a mobile phone camera with a high-precision vibration table according to the present invention includes a base 1, a rotary swing module 2, and a light source module 4. The rotary swing module 2 is slidably connected to the base 1 through a sliding component 3. The rotary swing module 2 is used to place the mobile phone and perform flipping and swinging on the mobile phone. The light source module 4 is movably arranged above the base 1. The light source module 4 provides a test light source to ensure that the center of the camera of the mobile phone is aligned with the test light source. During operation, the rotary swing module 2 moves to a position opposite to the light source module 4 through the sliding component 3, and the rotary swing module 2 is started to rotate and swing the mobile phone. Among them, the rotary swing module 2, the light source module 4, and the sliding module 3 can be electrically connected to the main control board, and each module is controlled respectively through the main control board. The present invention mainly provides a device for detecting the anti-shake performance of a camera with high precision and full automation. By swinging the mobile phone through the rotary swing module 2, in addition to the mobile phone, other electronic products with anti-shake functions and cameras are also included. High-precision control is achieved through the first DD motor 22 and the DD motor driver, such as the swing amplitude and vibration amplitude of the rotary swing module 2. The parameters of the DD motor can also be adjusted through the upper computer and the controller. When the sliding component 3 moves the rotary swing module 2 under the light source component, the rotary swing module 2 is started, and the mobile phone is driven to swing by the rotary swing module 2. At the same time, the light source module 4 emits light, and the mobile phone takes pictures during the swinging process. By adjusting the swinging parameters of the rotary swing module 2, such as frequency and swinging angle, combined with the image quality taken by the mobile phone, the anti-shake performance of the mobile phone is judged, and the swinging frequency and swinging angle received by the mobile phone can be adjusted with high precision, and the maximum performance of the mobile phone can be obtained through multiple different parameter indicators.

[0022] The working principle of the present invention is: Place the mobile phone at the fixed position of the rotary swing module 2. After fixation, the retraction cylinder 32 of the sliding component 3 drives the rotary swing module 2 to a position opposite to the light source module 4. Subsequently, start the rotary swing module 2. The first DD motor 22 rotates to drive the mobile phone to generate reciprocating swings within the frequency range of 0.1 degree to 8 degrees and 1 Hz to 8 Hz through the swing bracket 23, and perform high-precision gear adjustment through the DD motor driver to keep the amplitude sampling sine wave distortion rate within 4% for testing. At the same time, the swing bracket 23 is set at 45° relative to the fixed bracket 24, so that the mobile phone can change the positions in the X-axis and Y-axis directions simultaneously. When the swing bracket 23 swings, it is equivalent to changing the positions of the mobile phone in the X-axis and Y-axis simultaneously; at the same time, the test light source of the light source module 4 coincides with the center of the camera of the mobile phone, and the mobile phone can take pictures with the light source module 4 as a reference object. The photographing performance of the mobile phone can be obtained according to the set swing parameters and the image quality of the pictures taken by the mobile phone. And the second DD motor 26 provided on the swing bracket 23 can rotate the fixed bracket 24 to finely adjust the angle of the mobile phone to meet the automatic adjustment function of the mobile phone.

[0023] In this embodiment, the rotation and swing module 2 includes a base 21, a first DD motor 22, a swing bracket 23 and a fixed bracket 24. The base 21 is fixedly arranged on the sliding component 3. The first DD motor 22 is fixedly arranged on one side of the base 21. Both ends of the swing bracket 23 are respectively rotationally connected to the output end of the first DD motor 22 and one end of the base 21 through swing bearings 26. At least one fixed bracket 24 is arranged on the swing bracket 23 to fix the mobile phone. In the present invention, the DD motor is used to meet the high-precision test requirements of the mobile phone. The DD motor is a direct connection to the load, eliminating intermediate transmission links such as speed reducers and gears, and eliminating backlash errors and mechanical vibrations. In the present invention, the mobile phone is fixed on the fixed bracket 24. The first DD motor 22 rotates to make the swing bracket 23 rotate through the swing bearing 26, thereby realizing the vibration and swing of the mobile phone. Combining the high-resolution encoder and closed-loop control algorithm of the DD motor, it realizes ultra-high positioning accuracy of ±1 second level and millisecond-level dynamic response. Its low-speed and high-torque output solves the jitter problem of traditional servo motors with speed reducers. It adopts an ultra-thin hollow structure and through-hole design, which not only saves installation space but also facilitates wiring. At the same time, it has advantages such as high rigidity, low noise, maintenance-free and energy efficiency of more than 90%. And through the pulse control of the DD motor driver, the adjustment accuracy of the DD motor reaches a swing amplitude of 0.05° and a vibration amplitude of 1Hz. The rotation angle range of the first DD motor 22 is from 0.1° to 8°, and the swing frequency range is from 1Hz to 8Hz. And the rotation adjustment amplitude of the first DD motor 22 is 1.5°, and the swing frequency adjustment amplitude is 1Hz. Users can accurately adjust the high-frequency and low-angle or low-frequency and high-angle test environments, and obtain the upper limit of the anti-shake performance of the mobile phone through multiple tests with different parameter sizes. The swing bracket 23 is set at 45 degrees relative to the fixed bracket 24. Therefore, when the swing bracket 23 rotates and swings, the mobile phone on the fixed bracket 24 is equivalent to simultaneously displacing in the X-axis and Y-axis directions. The fixed bracket 24 displaces and swings along a straight line direction of 45°, rather than in a direction perpendicular or parallel to the swing bracket 23.

[0024] In this embodiment, the light source module 4 includes a test light source board 41, a synchronous belt 42, synchronous pulleys 43, transmission rods 44, an adjusting handwheel 45, and a measuring scale 46. At least two synchronous pulleys 43 are respectively arranged on two opposite brackets of the mounting bracket 9 and are connected by the synchronous belt 42 for transmission. One end of at least two transmission rods 44 is coaxially connected to the synchronous pulleys 43 respectively, and the other end sequentially passes through the mounting bracket 9 and the test light source board 41 and is coaxially connected to the adjusting handwheel 45. The measuring scale 46 is fixedly arranged on the mounting bracket 9 and is used to measure the displacement distance of the test light source board 41. Among them, the test light source board 41 is mainly displaced by rotating the adjusting handwheel 45, and then the transmission rod 44 rotates to drive the test light source board 41 to displace. The two synchronous pulleys 43 are also connected by the synchronous belt 42 for transmission. Therefore, when any one of the adjusting handwheels 45 is rotated, the other synchronous pulley 43 is rotated through the synchronous belt 42 to drive the corresponding transmission rod 44, so that the test light source board 41 can be displaced synchronously. Moreover, the measuring scale 46 on the mounting bracket 9 can also be used to observe the current height of the test light source board 41 to meet the test requirements at different heights, which is convenient and practical. The test light source board 41 can provide a test light source to meet the photographing requirements of the mobile phone, and according to the image quality, it is convenient to detect the anti-shake performance of the mobile phone.

[0025] In this embodiment, at least one second DD motor 26 is further arranged on the swing bracket 23, and the output end of any one second DD motor 26 is rotatably connected to the fixed bracket 24. The fixed bracket 24 can be finely rotated at an angle through the second DD motor 26 to meet the automatic adjustment function of the mobile phone and achieve the anti-shake effect test of the mobile phone.

[0026] In this embodiment, the sliding assembly 3 includes a retracting cylinder 32, a sliding track 33, a chassis 31, and a connecting piece 35. The base 21 is fixedly arranged on the chassis 31, and the chassis 31 is slidably arranged on the sliding track 33 through a sliding block 34. The working end of the retracting cylinder 32 is fixedly connected to the chassis 31 through the connecting piece 35. When the working end of the retracting cylinder 32 contracts, the chassis 31 is driven to displace through the connecting piece, so that the chassis 31 can drive the rotary swing module 2 to displace, enabling the camera of the mobile phone to be aligned with the test light source. Further, an auxiliary bearing 5 and an auxiliary bracket 6 are arranged on one side of the sliding track 33. The auxiliary bracket 6 is fixedly connected to the sliding track 33. The auxiliary bearing 5 is slidably sleeved on the auxiliary bracket 6 and contacts the chassis 31. When the chassis 31 is driven to move by the retracting cylinder 32, the auxiliary bearing 5 can reduce the friction between the sliding block 34 and the sliding track 33, help the chassis 31 slide more smoothly, and provide an additional bearing support point for the chassis 31 to ensure the stable sliding of the chassis 31.

[0027] In this embodiment, at least one fixed cylinder 7 and a fixed clamping block 8 are provided on the fixed bracket 24. The output end of the fixed cylinder 7 is fixedly connected to the fixed clamping block 8. When the fixed cylinder 7 expands and contracts, the fixed clamping block 8 presses the mobile phone through the thrust provided by the fixed cylinder 7, so that the fixed clamping block 8 can resist the mobile phone. And one fixed cylinder 7 and one fixed clamping block 8 are set as a group, and a group of fixed cylinder 7 and fixed clamping block 8 are placed at each of the four corners of the mobile phone, so that the mobile phone can be stressed evenly, making the clamping of the fixed clamping block 8 more firm and stable. A limit block 10 can also be set to limit the mobile phone, and a group of fixed cylinder 7 and fixed clamping block 8 are set in the horizontal and vertical directions of the mobile phone respectively. When the fixed cylinder 7 extends, the fixed clamping block 8 abuts a corner of the mobile phone against the limit block 10, and the mobile phone is pressed against the limit block by the pressure of the fixed cylinder to ensure that it will not be swung out.

[0028] The advantages of the present invention are as follows: The present invention mainly realizes high-precision adjustment of the mobile phone within the rotation angle range of 0.1° to 8° and the swing frequency range of 1 Hz to 8 Hz through the first DD motor and the second DD motor, and the swing bracket is set at 45° relative to the fixed bracket, so that the mobile phone can perform compound reciprocating motion in two directions of the X-axis and the Y-axis, and the anti-shake performance of the mobile phone is judged by photographing the light source of the light source component.

[0029] The above-disclosed are only several specific embodiments of the present invention, but the present invention is not limited thereto. Any changes that can be thought of by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A mechanism for testing the performance indicators of a mobile phone camera using a high-precision vibration table, characterized in that, It includes a base, a rotation and swing module, a light source module and a sliding component. An installation bracket is provided on the base. The rotation and swing module is slidably connected to the base through the sliding component. The rotation and swing module is used to place a mobile phone and perform flipping and swinging on the mobile phone. The light source module is movably arranged on the installation bracket. The light source module provides a test light source to ensure that the center of the camera of the mobile phone is aligned with the test light source. During operation, the rotation and swing module moves to a position opposite to the light source module through the sliding component, and the rotation and swing module starts to rotate and swing the mobile phone.

2. The mechanism for testing the performance indicators of a mobile phone camera using a high-precision vibration table according to claim 1, characterized in that, The rotation and swing module includes a base, a first DD motor, a swing bracket and a fixing bracket. The base is fixedly arranged on the sliding component. The first DD motor is fixedly arranged on one side of the base. Both ends of the swing bracket are rotatably connected to the output end of the first DD motor and the end of the base away from the first DD motor through swing bearings respectively. At least one fixing bracket is provided on the swing bracket to fix the mobile phone.

3. The mechanism for testing the performance indicators of a mobile phone camera using a high-precision vibration table according to claim 2, characterized in that, At least one second DD motor is also provided on the swing bracket. The output end of any one second DD motor is rotatably connected to the fixing bracket.

4. The mechanism for testing the performance indicators of a mobile phone camera using a high-precision vibration table according to claim 2, characterized in that, The swing bracket is arranged at 45 degrees relative to the fixing bracket.

5. The mechanism for testing the performance indicators of a mobile phone camera using a high-precision vibration table according to claim 2, characterized in that, The rotation angle range of the first DD motor is from 0.1° to 8°, and the swing frequency range is from 1 Hz to 8 Hz.

6. The mechanism for testing the performance indicators of a mobile phone camera using a high-precision vibration table according to claim 5, characterized in that, The rotation adjustment range of the first DD motor is from 0 to 1.5°, and the swing frequency adjustment range is 1 Hz.

7. The mechanism for testing the performance indicators of a mobile phone camera using a high-precision vibration table according to claim 2, characterized in that, At least one fixing cylinder and a fixing clamp block are provided on the fixing bracket. The output end of the fixing cylinder is fixedly connected to the fixing clamp block. When the fixing cylinder expands and contracts, the fixing clamp block clamps and fixes the mobile phone.

8. The mechanism for testing the performance indexes of a mobile phone camera by using a high-precision vibration table according to claim 2, wherein, The sliding component includes a retracting cylinder, a sliding track, a chassis and a connecting piece. The base is fixedly arranged on the chassis. The chassis is slidably arranged on the sliding track through a sliding block. The working end of the retracting cylinder is fixedly connected to the chassis through the connecting piece. The retracting cylinder contracts to drive the displacement of the chassis.

9. The mechanism for testing the performance indexes of a mobile phone camera using a high-precision vibration table according to claim 8, characterized in that, An auxiliary bearing and an auxiliary bracket are also provided on one side of the sliding track. The auxiliary bracket is fixedly connected to the sliding track. The auxiliary bearing is slidably sleeved on the auxiliary bracket and contacts the chassis.

10. The mechanism for testing the performance indicators of a mobile phone camera using a high-precision vibration table according to claim 1, wherein The light source module includes a test light source board, a synchronous belt, synchronous wheels, a transmission rod, an adjusting handwheel and a measuring scale. At least two synchronous wheels are respectively arranged on two opposite brackets of the installation bracket and are connected by the synchronous belt. One ends of at least two transmission rods are coaxially connected to the two synchronous wheels respectively, and the other ends sequentially pass through the installation bracket and the test light source board and are coaxially connected to the adjusting handwheel. The measuring scale is fixedly arranged on the installation bracket and is used to measure the displacement distance of the test light source board.

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