Sensor performance detection device

Abstract

The utility model relates to the technical field of test equipment, and provides a sensor performance detection device, which comprises a shading box, a light source, a test grey card and a distance sensor, a test board is arranged in the shading box, the test grey card can move along the horizontal direction and is arranged in the shading box in a lifting way along the vertical direction, the test grey card is positioned above the test board, and the distance sensor is arranged above the test board. The light source is fixedly installed in the shading box to provide illumination with different brightness, and the distance sensor is installed on the test grey card and used for detecting the distance between the test table and the test grey card. The sensor performance detection device provided by the utility model not only can more accurately detect the performance of the sensor of the product to be detected, but also can realize the multi-mode test of the sensor.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a sensor performance testing device. Background Technology

[0002] Electronic devices are often equipped with distance sensors, and during the product development phase, it is necessary to test and evaluate the distance sensors installed on the electronic devices.

[0003] Currently, distance sensor testing is typically done manually. Users usually use a test gray card to manually move a certain distance directly above the product under test, and then measure the distance using a tape measure or ruler. The measured distance is then compared with the distance measured by the distance sensor on the product under test. However, because the test gray card cannot be fixed in place after being moved, the accuracy of measurements taken with a tape measure or ruler is relatively low. Utility Model Content

[0004] This invention provides a sensor performance testing device to solve the problems of low measurement data accuracy and low testing efficiency in existing distance sensor performance testing devices.

[0005] This utility model provides a sensor performance testing device, including: a light-shielding box, a light source, a test gray card, and a distance sensor. A test platform is installed inside the light-shielding box. The test gray card is movable in the horizontal direction and can be raised and lowered in the vertical direction and is located above the test platform. The light source is fixedly installed inside the light-shielding box to provide illumination of different brightness. The distance sensor is installed on the test gray card to detect the distance between the test platform and the test gray card.

[0006] According to the sensor performance testing device provided by this utility model, it further includes a illuminance meter and a color temperature sensor. The illuminance meter is fixed on the test platform for detecting the current illuminance inside the light-shielding box, and the color temperature sensor is fixed on the test platform for detecting the current color temperature inside the light-shielding box.

[0007] According to the sensor performance testing device provided by this utility model, the illuminance meter and the color temperature sensor are integrated into one unit.

[0008] According to the sensor performance testing device provided by this utility model, the test platform is rotatably installed inside the light-shielding box.

[0009] According to the present invention, a sensor performance testing device further includes a rotary drive component, which is fixed inside the light-shielding box. The drive shaft of the rotary drive component is connected to the test bench to drive the test bench to rotate around a horizontal axis.

[0010] According to the sensor performance testing device provided by this utility model, a first linear module and a second linear module are installed in the light-shielding box. The test gray card is fixed to the slide of the first linear module, and the first linear module is fixed to the slide of the second linear module. The sliding directions of the first linear module and the second linear module are perpendicular.

[0011] According to the sensor performance testing device provided by this utility model, the light source is a strip light, which extends along the height direction of the light-shielding box.

[0012] According to the sensor performance testing device provided by this utility model, the light source is installed on the inner walls of opposite sides of the light-shielding box.

[0013] According to the present invention, a sensor performance testing device is provided, wherein the test platform includes a base plate, a first rod, a second rod, a third rod, and a fourth rod;

[0014] The base plate is installed on the light-shielding box;

[0015] The first rod and the second rod are arranged in parallel, the third rod and the fourth rod are arranged in parallel, and the first rod and the third rod are arranged perpendicularly.

[0016] At least one of the first rod and the second rod is movably mounted on the base plate, and at least one of the third rod and the fourth rod is movably mounted on the base plate to fix the product to be tested.

[0017] According to the present invention, a sensor performance testing device further includes a host computer located outside the light-shielding box. The light source, the illuminance meter, the color temperature sensor, and the distance sensor are all communicatively connected to the host computer.

[0018] The sensor performance testing device provided by this utility model sets up a light source, a test gray card, and a test platform in a light-shielding box. The product to be tested is placed on the test platform. The test gray card can be adjusted vertically and moved horizontally. In conjunction with a distance sensor, it meets the requirements of the TOF sensor on the product under test for evaluating the detection accuracy at different heights and angles. By adjusting the light source to simulate the illumination under different environments, it works with the distance sensor to detect the anti-interference capability of the TOF sensor on the product under test, and realizes the multimodal evaluation of the TOF sensor. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the sensor performance testing device provided by this utility model.

[0021] Figure 2 This is a schematic diagram of the product under test placed on the test bench according to this utility model.

[0022] Figure label:

[0023] 1. Detection device;

[0024] 11. Light-shielding box; 12. Light source; 13. Test gray card; 14. Illuminance meter; 15. Distance sensor; 16. Test platform; 17. Rotary drive component; 18. Host computer; 161. Base plate; 162. First rod; 163. Second rod; 164. Third rod; 165. Fourth rod;

[0025] 100. Product to be tested. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] The terms "first" and "second" in the specification and claims of this utility model may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The following is combined Figures 1-2 The sensor performance testing device provided in this utility model will be described in detail through specific embodiments and application scenarios.

[0031] In some embodiments, such as Figure 1 and Figure 2 As shown, this embodiment provides a sensor performance testing device 1, including: a light-shielding box 11, a light source 12, a test gray card 13, and a distance sensor 15. A test platform 16 is installed inside the light-shielding box 11. The test gray card 13 is movable horizontally and vertically adjustable within the light-shielding box 11, positioned above the test platform 16. The light source 12 is fixedly installed inside the light-shielding box 11 to provide illumination of different brightness levels. The distance sensor 15 is installed on the test gray card 13 to detect the distance between the test platform 16 and the test gray card 13.

[0032] The test stand 16 is used to place the product under test 100, which is an electronic device equipped with a light sensor and a TOF sensor. The sensor performance testing device provided in this embodiment is used to test the performance of the light sensor and the TOF sensor on the electronic device.

[0033] Specifically, the test gray card 13 provides a standardized reflective surface, allowing the TOF sensor on the product under test 100 and the distance sensor 15 in the detection device 1 to be tested under the same reflectivity surface, thus improving testing accuracy. The product under test 100, placed on the test stage 16, is positioned opposite the test gray card 13. The TOF sensor on the product under test 100 measures the distance between the test stage 16 and the test gray card 13. Simultaneously, the distance sensor 15 mounted on the test gray card 13 measures the distance between the test stage 16 and the test gray card 13, using this distance as a standard distance value. The distance data measured by the TOF sensor on the electronic device is compared with the test data from the distance sensor 15 in the detection device 1, and error calculation is performed to determine the measurement accuracy of the TOF sensor on the electronic device.

[0034] Specifically, the distance sensor 15 can be a laser rangefinder.

[0035] The test gray card 13 can move horizontally left and right, and vertically up and down. As the test gray card 13 moves vertically, it is positioned at different heights. The horizontal movement of the test gray card 13 adjusts the relative angle between the TOF sensor in the product under test 100 and the test gray card 13. Simultaneously, the test gray card 13, in conjunction with the light source 12, can test the anti-interference capability of the TOF sensor in the product under test 100. Specifically, as the test gray card 13 moves vertically, the distance collected by the TOF sensor on the product under test 100 is compared with the standard distance value collected by the distance sensor 15 at that height, thereby evaluating the distance measurement accuracy of the TOF sensor in the product under test 100 at different heights. Since the signal emitted by the TOF sensor on the product under test 100 during testing is conical, the test gray card 13 is moved horizontally to detect the detection range of the TOF sensor. The furthest horizontal distance that the TOF sensor can identify is the cone radius of the cone-shaped signal emitted by the TOF sensor on the product under test 100. The identification angle of the TOF sensor can be determined by moving the test gray card 13.

[0036] The light source 12 in this embodiment can emit light and change the brightness and color temperature of the emitted light. Its illuminance adjustment range is 0–20000 lux, and its color temperature adjustment range is 0–12000 K. The brightness and color temperature of the light source 12 are adjusted to match the changes in ambient light from morning to night. The light-shielding box 11 can focus the light emitted by the light source 12 into the box space, so that the product under test 100 can receive sufficient light and avoid interference from external ambient light on the test results.

[0037] During testing, the illuminance and color temperature of the light source 12 are adjusted, and the spacing values ​​detected by the TOF sensor are read under different illuminance and color temperatures. The environmental interference error of the TOF sensor is determined based on the maximum and minimum spacing values, thereby evaluating the anti-interference performance of the TOF sensor in the product under test 100.

[0038] The sensor performance testing device 1 provided by this utility model sets up a light source 12, a test gray card 13 and a test platform 16 in a light-shielding box 11. The product under test 100 is placed on the test platform 16. The test gray card 13 can be adjusted vertically and moved horizontally. Together with the distance sensor 15, it meets the requirements of the TOF sensor on the product under test 100 for evaluating the detection accuracy at different heights and angles. By adjusting the light source 12 to simulate the illumination under different environments, it works with the distance sensor 15 to detect the anti-interference capability of the TOF sensor on the product under test 100, and realizes the multimodal evaluation of the TOF sensor.

[0039] The sensor performance testing device also includes a illuminance meter 14 and a color temperature sensor. The illuminance meter 14 is fixed to the test platform 16 to detect the current illuminance inside the light-shielding box 11, and the color temperature sensor is fixed to the test platform to detect the current color temperature inside the light-shielding box 11.

[0040] During testing, the test gray card 13 is moved vertically to its furthest position from the test platform 16. The brightness of the light source 12 is then adjusted between 0 and 20,000 lux, and its color temperature is adjusted between 0 and 12,000 K. The illuminance value of the light source 12 is collected by a illuminance meter 14 on the test platform 16 as the standard illuminance value, and the color temperature value of the light source 12 is collected by a color temperature sensor on the test platform 16 as the standard color temperature value. Simultaneously, the light sensor on the product under test 100 can synchronously collect the current illuminance and color temperature of the light source 12. The illuminance value detected by the light sensor in the product under test 100 is compared with the standard illuminance value, and the color temperature value detected by the light sensor in the product under test 100 is compared with the standard color temperature value. Error calculation is used to determine the measurement accuracy of the light sensor on the electronic device, thereby evaluating the performance of the light sensor in the product under test 100.

[0041] In one optional embodiment, the illuminance meter 14 and the color temperature sensor are separate components, both mounted on the test stage 16 and positioned in the same location as the product under test 100, avoiding significant deviations in detection accuracy due to different positions. In yet another optional embodiment, the illuminance meter 14 and the color temperature sensor are integrated into a single unit. For example, the illuminance meter 14 is a spectrophotometer, capable of detecting both color temperature and illuminance.

[0042] In some embodiments, such as Figure 1 As shown, the test stand 16 is rotatably installed inside the light shield 11.

[0043] To ensure that the TOF sensor in the product under test 100 is in a horizontal position, the test stage 16 can be rotated. Specifically, when the product under test 100 is placed on the test stage 16, the test stage 16 needs to be rotated to ensure that the TOF sensor in the product under test 100 is in a horizontal position. In this way, both the TOF sensor in the product under test 100 and the test gray card 13 are in a horizontal position, ensuring that the acquisition results of the distance between the product under test 100 and the test gray card 13 are relatively accurate.

[0044] In some embodiments, such as Figure 1 As shown, the sensor performance testing device 1 of this embodiment also includes a rotation drive 17, which is fixed inside the light shield 11. The drive shaft of the rotation drive 17 is connected to the test bench 16 to drive the test bench 16 to rotate around the horizontal axis.

[0045] In this embodiment, the rotary drive 17 can drive the test platform 16 to rotate left and right around the horizontal axis, so that the test platform 16 can automatically level the product under test 100. The rotary drive 17 can also precisely control the rotation angle, improving the accuracy of the rotation control of the test platform 16.

[0046] In some embodiments, the sensor performance testing device 1 of this embodiment further includes a plurality of lifting drive components, each of which is fixed to the bottom wall of the light shield 11, and the drive end of each lifting drive component is connected to the test platform 16.

[0047] The lifting drive components are installed on the bottom wall of the test platform 16. By controlling the stroke of each lifting drive component, the test platform 16 rotates, thereby leveling the product 100 under test. For example, four lifting drive components are installed at the bottom of the test platform 16, arranged in a square array. Two lifting drive components on the same side move synchronously, causing the test platform 16 to rotate around the central axis.

[0048] In some embodiments, such as Figure 1 As shown, the light-shielding box 11 of this embodiment is equipped with a first linear module and a second linear module. The test gray card 13 is fixed to the slide of the first linear module, and the first linear module is fixed to the slide of the second linear module. The sliding directions of the first linear module and the second linear module are perpendicular.

[0049] In this embodiment, the second linear module is arranged vertically, and the slide of the second linear module slides vertically to adjust the height of the test gray card 13. By adjusting the distance between the TOF sensor on the product under test 100 and the test gray card 13, the testing accuracy of the TOF sensor on the product under test 100 at different heights can be tested.

[0050] Specifically, the slide of the second linear module can move vertically between 0 and 120 cm. When testing the detection accuracy of the TOF sensor at different heights in the product under test 100, the distance value measured by the TOF sensor of the product under test 100 is read every 10 cm, as well as the standard distance value between the test platform 16 and the test gray card 13 detected by the distance sensor 15.

[0051] In this embodiment, the first linear module is positioned horizontally, and its slide slides horizontally to adjust the horizontal position of the test gray card 13. When testing the detection accuracy of the TOF sensor in the product under test 100 at different angles, the test gray card 13 is moved vertically to a position 60cm above the test platform 16, the slide of the first linear module is controlled to slide horizontally, and the two limit recognition distances in the horizontal direction are read to calculate the recognition angle of the TOF sensor in the product under test 100.

[0052] In some embodiments, such as Figure 1 As shown, the light source 12 in this embodiment is a strip light, which extends along the height direction of the light shield 11.

[0053] The front of the light-shielding box 11 has no obstructions to facilitate observation of the operation of the detection device 1. The light-shielding box 11 does not have a top wall to prevent it from interfering with the distance between the TOF sensor on the product under test 100 and the test gray card 13. In this embodiment, the light source 12 is a strip light, ensuring uniform illumination throughout the light-shielding box 11 along its height, guaranteeing that the product under test 100 is uniformly illuminated and enhancing the high degree of fit for ambient light simulation.

[0054] In some embodiments, such as Figure 1 As shown, light sources 12 are installed on the inner walls of opposite sides of the light-shielding box 11.

[0055] In this embodiment, light sources 12 are installed on the inner walls of opposite sides of the light-shielding box 11. The light sources 12 can emit light on opposite sides, so that the internal space of the light-shielding box 11 can be evenly covered with the illumination of the light sources 12. The installation of multiple light sources 12 increases the area covered by the light sources inside the light-shielding box 11, making the illumination inside the light-shielding box 11 more uniform and improving the simulation similarity of ambient light.

[0056] In some embodiments, such as Figure 2 As shown, the test platform 16 includes a base plate 161, a first rod 162, a second rod 163, a third rod 164, and a fourth rod 165.

[0057] The base plate 161 is mounted on the light-shielding box 11. The first rod 162 and the second rod 163 are arranged in parallel, and the third rod 164 and the fourth rod 165 are arranged in parallel, with the first rod 162 and the third rod 164 arranged perpendicularly. At least one of the first rod 162 and the second rod 163, and at least one of the third rod 164 and the fourth rod 165, are movably mounted on the base plate 161 to fix the product 100 to be tested.

[0058] In this embodiment, the base plate 161 is used to place the product under test 100, and the first rod 162, the second rod 163, the third rod 164, and the fourth rod 165 are used to clamp and fix the product under test 100. Since the specifications of the product under test 100 vary, their external dimensions will also differ. To adapt to different sizes of the product under test 100, the test platform 16 of this embodiment can adjust the clamping interval. The distance between the first rod 162 and the second rod 163 is adjustable. After adjustment, the first rod 162 and the second rod 163 are fixed from one direction of the product under test 100. The distance between the third rod 164 and the fourth rod 165 is adjustable. After adjustment, the third rod 164 and the fourth rod 165 are fixed from the other direction of the product under test 100. After adjustment, the first rod 162, the second rod 163, the third rod 164, and the fourth rod 165 can be locked with fasteners to stably clamp the product under test 100.

[0059] In some embodiments, such as Figure 1 As shown, the sensor performance testing device 1 in this embodiment also includes a host computer 18, which is located outside the light-shielding box 11. The light source 12, illuminance meter 14, color temperature sensor and distance sensor 15 are all communicatively connected to the host computer 18.

[0060] The host computer 18 can control the light source 12 to emit light and adjust its illuminance and color temperature. The illuminance and color temperature values ​​of the light source 12 are displayed on the host computer 18's screen. The illuminance meter 14, color temperature sensor, and distance sensor 15 are all communicatively connected to the host computer 18, allowing data collected by these components to be sent to the host computer 18. The host computer 18 can then acquire and display the current illuminance value collected by the illuminance meter 14, the current color temperature value collected by the color temperature sensor, and the distance between the test platform 16 and the test gray card 13 collected by the distance sensor 15 on its screen.

[0061] The host computer 18 has a processor that can analyze and compare the acquired data to obtain the performance evaluation results of the TOF sensor and optical sensor in the product under test 100.

[0062] The host computer 18 is electrically connected to the rotary drive 17, thereby enabling the rotary drive 17 to drive the test bench 16 to rotate.

[0063] The host computer 18 is electrically connected to the first linear module and the second linear module. Therefore, the host computer 18 can control the linear movement of the first and second linear modules via a built-in test program or according to user-input commands.

[0064] The host computer 18 can communicate with the light source 12, the illuminance meter 14 and the distance sensor 15 either through wires or through a wireless communication module.

[0065] In some embodiments, such as Figure 1 As shown, the light-shielding box 11 in this embodiment is provided with a wire hole. The light source 12, illuminance meter 14, color temperature sensor and distance sensor 15 are connected to the host computer 18 through wires. The wires are passed through the wire hole and a sealing component is installed in the wire hole.

[0066] In this embodiment, the light source 12, illuminance meter 14, color temperature sensor, and distance sensor 15 transmit signals to the host computer 18 via wires to improve signal transmission stability. The light-shielding box 11 has a wire-passing hole on the side closest to the host computer 18, through which the wires pass. To prevent the light source 12 from exiting through the wire-passing hole, a sealing element ensures the wires can pass through, but prevents light from passing through. Specifically, the sealing element can be a silicone part or a rubber part.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sensor performance testing device, characterized in that, The device includes: a light-shielding box, a light source, a test gray card, and a distance sensor. A test platform is installed inside the light-shielding box. The test gray card is movable horizontally and can be raised and lowered vertically within the light-shielding box. The test gray card is located above the test platform. The light source is fixedly installed inside the light-shielding box to provide illumination of different brightness levels. The distance sensor is installed on the test gray card to detect the distance between the test platform and the test gray card.

2. The sensor performance testing device according to claim 1, characterized in that, It also includes a illuminance meter and a color temperature sensor. The illuminance meter is fixed to the test platform to detect the current illuminance inside the light-shielding box, and the color temperature sensor is fixed to the test platform to detect the current color temperature inside the light-shielding box.

3. The sensor performance testing device according to claim 2, characterized in that, The illuminance meter and the color temperature sensor are integrated into one unit.

4. The sensor performance testing device according to claim 1, characterized in that, The test stand is rotatably installed inside the light-shielding box.

5. The sensor performance testing device according to claim 4, characterized in that, It also includes a rotary drive component, which is fixed inside the light-shielding box, and the drive shaft of the rotary drive component is connected to the test platform to drive the test platform to rotate around a horizontal axis.

6. The sensor performance testing device according to claim 1, characterized in that, The light-shielding box is equipped with a first linear module and a second linear module. The test gray card is fixed to the slide of the first linear module, and the first linear module is fixed to the slide of the second linear module. The sliding directions of the first linear module and the second linear module are perpendicular.

7. The sensor performance testing device according to claim 1, characterized in that, The light source is a strip light, which extends along the height of the light-shielding box.

8. The sensor performance testing device according to claim 1 or 7, characterized in that, The light source is installed on the inner walls of opposite sides of the light-shielding box.

9. The sensor performance testing device according to claim 1, characterized in that, The test platform includes a base plate, a first rod, a second rod, a third rod, and a fourth rod; The base plate is installed on the light-shielding box; The first rod and the second rod are arranged in parallel, the third rod and the fourth rod are arranged in parallel, and the first rod and the third rod are arranged perpendicularly. At least one of the first rod and the second rod is movably mounted on the base plate, and at least one of the third rod and the fourth rod is movably mounted on the base plate to fix the product to be tested.

10. The sensor performance testing device according to claim 2, characterized in that, It also includes a host computer, which is located outside the light-shielding box. The light source, the illuminance meter, the color temperature sensor, and the distance sensor are all communicatively connected to the host computer.

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