Light sensor calibration jig

Abstract

The utility model discloses a light sensor calibration jig which comprises a jig body, a fixing clamp, a standard light source and an illuminometer. The jig body is composed of a jig bottom plate, a jig cover plate and a jig side panel, the fixing clamp is installed on a bearing base of the jig bottom plate, and the jig is adaptive to light sensing devices to be calibrated of different sizes through sliding adjustment of the movable adjusting upper positioning block, the movable adjusting side positioning block and the positioning block. The standard light source is fixed in the jig cover plate, is composed of a light emitting diode module and a light equalizing plate and provides uniform illumination, and brightness adjustment is achieved through the light brightness control module. The illuminometer is used for measuring the brightness of the standard light source in real time and ensuring the light intensity stability of calibration of the light sensor. According to the utility model, multi-device adaptation is realized through structure adjustment, a high-precision and low-cost calibration scheme is provided, and the device has the advantages of strong adaptability, high calibration efficiency, stable structure, convenient operation and the like.

Description

Technical Field

[0001] This utility model relates to the field of industrial production testing technology, specifically to a light sensor calibration fixture. Background Technology

[0002] With the widespread use of electronic devices, light intensity sensors are widely used in many electronic devices, such as smartphones, tablets, and smartwatches. The accuracy of light intensity sensors is crucial for functions such as automatic light intensity detection, screen brightness adjustment, energy consumption control, and camera exposure control. However, during the production process, due to various factors, the initial measurement values ​​of light intensity sensors are often deviated, requiring calibration. Existing light sensor calibration fixtures have the following problems in practical applications:

[0003] 1. Difficulty in controlling consistency: The stability and consistency of standard light sources are difficult to guarantee, which may lead to inaccurate calibration results; the operation process is relatively cumbersome, requiring professional personnel to operate, which is inefficient and makes it difficult to guarantee consistency; different models of photosensors require different calibration methods and equipment, which increases production costs and makes it difficult to guarantee consistency.

[0004] 2. Simple fixtures are difficult to operate: Simple fixtures lack precise calibration and control methods, making it difficult to accurately grasp the matching between the light sensor and the light source. In addition, simple fixtures rely on manual operation, making it difficult to control the synchronization of calibration. Asynchronous reception by the light source and the sensor will cause deviations, reducing the accuracy of operation and the correctness of product data.

[0005] 3. High cost of automated calibration equipment: The design and development of automated calibration equipment for photosensitive sensors requires the entire equipment to be synchronized with the product and to ensure the accuracy and stability of calibration data. This requires complex structures and transmission devices, resulting in high overall costs for the research and development and manufacturing of such equipment. It also limits its use in a variety of products.

[0006] 4. Limited adaptability: Simple fixtures can be flexibly adjusted for different sizes and models of light sensors and different types of terminal products (such as mobile phones and tablets of various sizes), but the operation is complicated, the accuracy is poor, and automated equipment needs to explore suitable calibration parameters and methods again, resulting in poor versatility.

[0007] 5. Products that are easily damaged: During operation by personnel or testing with simple tools, the surface of the product can be easily scratched, especially some electronic devices with high appearance requirements. This will affect the overall aesthetics of the product and may even lead to the appearance defects. Utility Model Content

[0008] Technical objective: To address the shortcomings of existing light sensor calibration fixture technology, this utility model discloses a light sensor calibration fixture that can adapt to different equipment models by adjusting the fixture structure and use a stable standard light source to ensure calibration accuracy, thereby improving production efficiency and calibration quality.

[0009] Technical solution: To achieve the above technical objectives, the present invention adopts the following technical solution:

[0010] A light sensor calibration fixture includes a fixture body, which includes a fixture cover plate, a fixture side panel, and a fixture base plate. A support base is fixedly mounted on the fixture base, and a fixing clamp for placing a light sensor device to be calibrated is fixed on the support base. The fixing clamp is provided with a movable and adjustable positioning component to adapt to light sensor devices of different sizes to be calibrated. A standard light source is fixedly mounted on the fixture cover plate of the fixture body to provide a calibration light source. An illuminance meter for calibrating the brightness of the standard light source is also provided inside the fixture body.

[0011] Preferably, the positioning component of the fixing fixture includes a movable adjustable upper positioning block, a positioning block, and a movable adjustable side positioning block. The movable adjustable upper positioning block is slidably mounted on the top of the fixing fixture to limit the height range of the light sensor device to be calibrated. The movable adjustable side positioning block is slidably mounted on the side of the fixing fixture to fix the width range of the light sensor device to be calibrated. The positioning block is fixedly set on the opposite side of the movable adjustable side positioning block to limit the fixed position of the light sensor device to be calibrated.

[0012] Preferably, the support base is provided with adjustable positioning holes on both sides, and the support base is connected to the fixture base plate through the adjustable positioning holes, and its installation position can be adjusted along the adjustable positioning holes.

[0013] Preferably, the adjustable positioning hole of the base is elongated, and the base positioning hole is provided on the base plate of the fixture. The adjustable positioning hole of the base is connected to the positioning hole of the base by screws.

[0014] Preferably, the standard light source is fixed to the fixture cover plate through the standard light source positioning screw hole. The standard light source includes a light diffusion plate, a light-emitting diode module and a light brightness control module. The light-emitting diode module is arranged in a matrix. The light diffusion plate is a white light-transmitting material and its surface is sealed with a rubber ring to prevent external light interference.

[0015] Preferably, the light brightness control module converts the input 220V AC power into 24V DC power, and adjusts the current to achieve a standard light source brightness range of 50 lux to 2000 lux.

[0016] Preferably, the illuminance measurement range of the illuminance meter is 0 lux to 200,000 lux, the measurement accuracy is ±5%rdg±10, the sampling frequency is 2 times / second, the resolution is 1 lux, and it uses three 1.5V AAA batteries as power sources.

[0017] Preferably, the fixing fixture is provided with positioning screw holes, and the support base is provided with base fixture positioning screw holes. The positions of the positioning screw holes correspond to the positioning screw holes of the base fixture. The two are connected by screws to connect the fixing fixture to the support base.

[0018] Beneficial effects: 1. The fixing fixture of this utility model includes a movable and adjustable upper positioning block, a movable and adjustable side positioning block, and a positioning block. The movable and adjustable upper positioning block can slide to adjust the vertical height, and the movable and adjustable side positioning block can slide to adjust the horizontal width. The positioning block is fixed at the bottom and is used for longitudinal limiting and supporting the equipment. The base is provided with an elongated adjustable positioning hole, which can adjust the positional relationship between the bearing base and the fixture body, further improving the flexibility of the fixture. The movable and adjustable upper positioning block, the movable and adjustable side positioning block, and the positioning block constitute a three-dimensional adjustment structure, which can be adapted to electronic devices of different sizes and models (such as mobile phones, tablets, smartwatches, etc.), with strong versatility, greatly reducing the time and cost of customizing calibration fixtures for different devices.

[0019] The standard light source of this invention consists of a light-emitting diode module, which diffuses the light evenly through a light-diffusing plate. A sealing rubber ring is provided at the edge to ensure effective light shielding and prevent interference from ambient light. It is equipped with a photometer for real-time measurement and adjustment of the standard light source's brightness range (50~2000 lux), ensuring the uniformity and accuracy of the light intensity. Through the diffusion effect of the light-diffusing plate and the calibration function of the photometer, the light sensor is calibrated under ideal lighting conditions, greatly reducing calibration errors caused by uneven light or unstable light intensity.

[0020] The modular design, including the fixing fixture, support base, and standard light source, allows for quick assembly and disassembly. The adjustment mechanism is simple, requiring no complex training for operators to master its use. The illuminance meter operates at a frequency of 2 times per second, with a resolution of 1 lux, providing real-time feedback of the light intensity data needed for calibration. This modular design reduces operational difficulty, improves the work efficiency of production line operators, and minimizes human error during calibration. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0022] Figure 1 This is a schematic diagram of the structure of the fixing clamp of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the support base of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the standard light source of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the fixture body of this utility model;

[0026] Figure 5 This is a schematic diagram of the overall structure of the light sensor calibration fixture of this utility model.

[0027] In the diagram: 1. Positioning screw hole; 2. Movable and adjustable upper positioning block; 3. Positioning block; 4. Movable and adjustable side positioning block; 5. Adjustable positioning hole of the base; 6. Positioning screw hole of the base fixture; 7. Bearing base plate; 8. Standard light source; 9. Positioning screw hole of the standard light source; 10. Fixture cover plate; 11. Fixture side panel; 12. Fixture base plate. Detailed Implementation

[0028] The present invention will be described more clearly and completely below by way of a preferred embodiment in conjunction with the accompanying drawings, but this does not limit the present invention to the scope of the described embodiment.

[0029] like Figure 4 and Figure 5 As shown, this utility model provides a light sensor calibration fixture, including a fixture body, which includes a fixture cover plate 10, a fixture side panel 11, and a fixture base plate 12. A support base 7 is fixedly mounted on the fixture base plate 12, and a fixing clamp for placing a light sensor device to be calibrated is fixedly mounted on the support base 7. The light sensor device to be calibrated is an electronic device containing a light sensor, such as a mobile phone, tablet computer, or smartwatch. The fixing clamp is provided with a movable and adjustable positioning component to adapt to light sensor devices of different sizes to be calibrated. A standard light source 8 is fixedly mounted on the fixture cover plate 10 of the fixture body to provide a calibration light source. A photometer for calibrating the brightness of the standard light source 8 is also provided inside the fixture body.

[0030] like Figure 1As shown, the positioning components of the fixing fixture include a movable and adjustable upper positioning block 2, a positioning block 3, and a movable and adjustable side positioning block 4. The movable and adjustable upper positioning block 2 is slidably mounted on the top of the fixing fixture to limit the height range of the light sensor to be calibrated. The movable and adjustable side positioning block 4 is slidably mounted on the side of the fixing fixture to fix the width range of the light sensor to be calibrated. The positioning block 3 is fixedly set on the side of the fixing fixture opposite to the movable and adjustable side positioning block 4 to limit the fixed position of the light sensor to be calibrated. The positioning components of the fixing fixture are designed according to the size of the light sensor to be calibrated. Key dimensions must be accurately measured to ensure that the light sensor to be calibrated can be fixed in a uniform position. The movable and adjustable upper positioning block 2, positioning block 3, and movable and adjustable side positioning block 4 can be adapted to the light sensor to be calibrated.

[0031] The movable adjustable upper positioning block 2 and the movable adjustable side positioning block 4 are mainly fixed by screws, and can be adjusted to fix the fixed position for light sensing devices of different sizes to be calibrated, ensuring the flexibility and accuracy of positioning. The fixing fixture is provided with positioning screw holes 1, and the support base 7 is provided with base fixture positioning screw holes 6. The position of positioning screw holes 1 corresponds to the position of base fixture positioning screw holes 6. The two are connected by 6 screws, thereby connecting the fixing fixture to the support base 7.

[0032] like Figure 2 As shown, adjustable positioning holes 5 are provided on both sides of the support base 7. The support base 7 is connected to the fixture base plate 12 through the adjustable positioning holes 5 and its installation position can be adjusted along the adjustable positioning holes 5. The adjustable positioning holes 5 are elongated. The fixture base plate 12 has a base positioning hole. The adjustable positioning holes 5 are connected to the base positioning hole by screws.

[0033] like Figure 3 As shown, the standard light source 8 is fixed on the fixture cover plate 10 through the standard light source positioning screw holes 9. There are 4 standard light source positioning screw holes 9. The standard light source 8 includes a light diffuser plate, a light-emitting diode module and a light brightness control module. The light-emitting diode module contains several diodes arranged in a matrix. The light diffuser plate is made of white light-transmitting material and its surface is sealed with a rubber ring to prevent external light interference.

[0034] According to the calibration requirements, during installation, the light-emitting area of ​​the light-diffusing plate must cover the photosensitive hole of the light-sensing device to be calibrated, and the standard light source must be firmly and tightly installed on the upper part of the fixture body without any looseness or shaking.

[0035] In one embodiment, the light brightness control module converts the input 220V AC power to 24V DC power and adjusts the current to achieve a standard light source brightness range of 50 lux to 2000 lux.

[0036] In one embodiment, the illuminance measurement range of the illuminance meter is 0 lux to 200,000 lux, the measurement accuracy is ±5%rdg±10, the sampling frequency is 2 times / second, the resolution is 1 lux, and it uses three 1.5V AAA batteries as a power source.

[0037] The assembly process of this utility model's light sensor calibration fixture is as follows:

[0038] The fixture and positioning components are designed according to the dimensions of the light sensor to be calibrated, allowing the light sensor to be placed inside the fixture. The movable and adjustable upper positioning block 2, positioning block 3, and movable and adjustable side positioning block 4 can fix the light sensor to be calibrated. Then, the movable and adjustable upper positioning block 2 and the movable and adjustable side positioning block 4 are fixed with two screws respectively, completing the installation of the movable and adjustable upper positioning block 2 and the movable and adjustable side positioning block 4. According to the opening position of the positioning screw hole 1 on the fixture, the corresponding position of the base fixture positioning screw hole 6 is opened on the support base plate 7. The fixture is aligned and assembled with the support base plate 7. After assembly, six M2 screws are taken out and screwed into the corresponding screw holes one by one with an Allen wrench to ensure that the entire assembly structure is stable, completing the installation of the fixture.

[0039] Based on the position of the standard light source positioning screw hole 9 of the standard light source 8, make holes at the corresponding positions on the fixture cover plate 10, align and assemble the standard light source 8 with the fixture cover plate 10. After assembly, take out 4 M2 screws and use an Allen wrench to screw the screws into the corresponding screw holes one by one to ensure that the entire assembly structure is stable and complete the installation of the standard light source 8.

[0040] Based on the position of the adjustable positioning hole 5 on the base plate 7, screw holes are made at the corresponding positions on the fixture base plate 12. The base plate 7 and the fixture base plate 12 are aligned and assembled. After assembly, two M2 screws are taken out and screwed into the corresponding positioning holes one by one with an Allen wrench to ensure that the entire assembly structure is stable and the installation of the base plate 7 is completed.

[0041] The working principle of this new light sensor calibration fixture is as follows:

[0042] The light-sensing device to be calibrated (such as a smartphone or tablet) is positioned and stabilized within the fixture body using a fixing clamp. The movable and adjustable upper positioning block 2 slides vertically to adapt to the device height; the movable and adjustable side positioning block 4 slides horizontally to fix the device width; the positioning block 3 provides longitudinal limit and bottom support to prevent the device from moving during calibration. After locking the fixing clamp position with screws, it is ensured that the device is completely fixed in three-dimensional space, and the light sensor is directly facing the standard light source 8.

[0043] The standard light source 8 uses an internal LED module. The brightness is adjusted by regulating the current through a brightness control module. The light emitted by the LED module is diffused by a light-diffusing plate to ensure uniform light distribution and prevent uneven brightness from affecting the calibration accuracy of the light sensor. The light source brightness range is 50~2000 lux. An AC-to-DC module converts 220V AC power to 24V DC power to supply the LED module, ensuring the stability and safety of the light source. The standard light source 8 has a sealing rubber ring around its edge, and the fixture side panel 11 of the fixture body features a light-shielding design to effectively block external ambient light interference, ensuring that the light sensor receives a pure and uniform light source signal.

[0044] A photometer is installed inside the fixture to measure the brightness of the standard light source 8 in real time. The measurement range is 0~200000 lux, the accuracy is ±5%rdg ±10, and the resolution is 1 lux. During the calibration process, the operator uses the photometer to confirm whether the actual brightness of the standard light source 8 meets the required calibration value. If the brightness deviation exceeds the allowable range, the brightness of the LED module is adjusted through the brightness control module until the calibration requirements are met.

[0045] Power on the light sensor device to be calibrated and enter the engineering test mode. Start the light sensor calibration software in the device. The light emitted by the standard light source 8 is evenly irradiated onto the light sensor position of the light sensor device to be calibrated. The calibration software compares the brightness signal received by the light sensor with the preset standard brightness value, calculates the deviation of the light sensor, and automatically adjusts it. After the adjustment is completed, the calibration software outputs the calibration result and displays PASS or FAIL.

[0046] The three-dimensional adjustment structure of the movable and adjustable upper positioning block 2, movable and adjustable side positioning block 4, and positioning block 3 ensures that the equipment is completely fixed during calibration, avoiding calibration errors caused by equipment shaking; the limiting edge of positioning block 3 further prevents the equipment from shifting in the lateral or longitudinal direction. The adjustable design of the fixing fixture ensures that the light sensor of the equipment is directly facing the uniform light area of ​​the standard light source, ensuring that the light from the light source completely covers the sensor.

[0047] The illuminance meter provides real-time brightness feedback from the standard light source 8 to ensure that the standard light source is within the set working range. The calibration software in the light sensor device to be calibrated calculates the calibration result based on the actual response of the light sensor and displays the result on the device screen. If the calibration result is FAIL, the operator needs to check whether the device is placed correctly or whether the light source brightness is stable. If necessary, readjust the fixing fixture or the light source brightness until the device passes the calibration.

[0048] After successful calibration, remove the device from the fixture and repeat the above process to calibrate the next device.

[0049] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A light sensor calibration fixture, characterized in that, The fixture includes a fixture body, which includes a fixture cover plate (10), a fixture side panel (11), and a fixture base plate (12). A support base (7) is fixedly installed on the fixture base plate (12). A fixing clamp for placing the light sensing device to be calibrated is fixed on the support base (7). The fixing clamp is provided with a movable and adjustable positioning component to adapt to light sensing devices of different sizes to be calibrated. A standard light source (8) is fixedly installed on the fixture cover plate (10) of the fixture body to provide a calibration light source. A photometer for calibrating the brightness of the standard light source is also provided in the fixture body.

2. The light sensor calibration fixture according to claim 1, characterized in that, The positioning components of the fixture include a movable and adjustable upper positioning block (2), a positioning block (3), and a movable and adjustable side positioning block (4). The movable and adjustable upper positioning block (2) is slidably mounted on the top of the fixture to limit the height range of the light sensor to be calibrated. The movable and adjustable side positioning block (4) is slidably mounted on the side of the fixture to fix the width range of the light sensor to be calibrated. The positioning block (3) is fixedly set on the opposite side of the movable and adjustable side positioning block (4) to limit the fixed position of the light sensor to be calibrated.

3. The light sensor calibration fixture according to claim 1, characterized in that, The support base (7) has adjustable positioning holes (5) on both sides. The support base (7) is connected to the fixture base plate (12) through the adjustable positioning holes (5) and its installation position can be adjusted along the adjustable positioning holes (5).

4. A light sensor calibration fixture according to claim 3, characterized in that, The adjustable positioning hole (5) of the base is long and narrow. The base positioning hole is provided on the base plate (12). The adjustable positioning hole (5) of the base is connected to the base positioning hole by screws.

5. A light sensor calibration fixture according to claim 1, characterized in that, The standard light source (8) is fixed on the fixture cover plate (10) through the standard light source positioning screw hole (9). The standard light source (8) includes a light distribution plate, a light-emitting diode module and a light brightness control module. The light-emitting diode module is arranged in a matrix. The light distribution plate is made of white light-transmitting material and its surface is sealed with a rubber ring to prevent external light interference.

6. A light sensor calibration fixture according to claim 5, characterized in that, The light intensity control module converts the input 220V AC power into 24V DC power and adjusts the current to achieve a standard light source brightness range of 50 lux to 2000 lux.

7. A light sensor calibration fixture according to claim 1, characterized in that, The illuminance measurement range of the illuminance meter is 0 lux to 200,000 lux, the measurement accuracy is ±5%rdg±10, the sampling frequency is 2 times / second, the resolution is 1 lux, and it uses three 1.5V AAA batteries as a power source.

8. A light sensor calibration fixture according to claim 1, characterized in that, The fixed clamp is provided with a positioning screw hole (1), and the base (7) is provided with a base clamp positioning screw hole (6). The position of the positioning screw hole (1) corresponds to the positioning screw hole (6) of the base clamp. The two are connected by screws to connect the fixed clamp to the base (7).

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