Automobile lamp test equipment and test method thereof

Abstract

The invention is suitable for the technical field of automobile lamp testing, and provides automobile lamp testing equipment and a testing method thereof, and the equipment comprises a housing, a testing unit, a control unit, and a control system. The shell is arranged to be in a hollow cuboid shape, the shell provides a test environment for vehicle lamp detection, and the shell comprises a bottom plate, an opening and closing plate rotationally connected to one side of the bottom plate, a front panel connected to one side of the bottom plate and a top plate connected to the top of the front panel; the testing unit is arranged in the shell and comprises a support, four groups of supporting rods connected to the support, a mounting frame slidably connected to the supporting rods, a mounting plate connected to the tops of the supporting rods, and an infrared detection module mounted at the bottom of the mounting plate; according to the device, the problem that leakage points are difficult to accurately position when the automobile lamp is subjected to air tightness detection is solved, and the purposes of accurately positioning through color comparison and realizing accurate maintenance are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lamp testing, and more specifically, it relates to an automotive vehicle lamp testing device and a testing method thereof. Background Art

[0002] Automotive vehicle lamps are an indispensable part of a vehicle. They not only provide necessary lighting at night and under low visibility conditions, but also ensure driving safety through various signal lights. To ensure that the electronic components and light sources inside the automotive vehicle lamps are not damaged, the automotive vehicle lamps have a certain airtightness to prevent external air, moisture, and other contaminants from entering the lamps.

[0003] Currently, the detection of automotive vehicle lamps usually includes detecting the brightness of the automotive vehicle lamps, damage or scratches on the automotive vehicle lamps, and the airtightness of the automotive vehicle lamps. The detection of the brightness of the automotive vehicle lamps and the detection of damage or scratches are usually carried out before the automotive vehicle lamp cover and the base are installed. However, the airtightness detection of the automotive vehicle lamps must be carried out after the automotive vehicle lamps are assembled.

[0004] Generally speaking, in the actual production process, if there is an airtightness problem with the newly produced vehicle lamps and air leakage occurs, the vehicle lamps need to be centrally processed or even destroyed. However, if the used vehicle lamps are returned to the factory for repair, the airtightness problem of the vehicle lamps also needs to be detected. The different processing methods of the two types of vehicle lamps result in different levels of detection precision for the two types of vehicle lamps.

[0005] For used vehicle lamps with airtightness problems, including damage to the lamp cover or the base or leakage at the seal strip, usually if the airtightness problem is caused by damage to the lamp cover or the base, it can be observed by the naked eye of the detection personnel. Therefore, the detection agency needs to detect the seal strip between the automotive vehicle lamp base and the automotive vehicle lamp. Since the used vehicle lamps with airtightness problems need to be repaired after detection, the repair of the seal strip usually involves applying glue, so the glue application requires accurate positioning of the air leakage point.

[0006] Moreover, it should be considered that the automotive vehicle lamp cover, the seal strip, and the automotive vehicle lamp base will have a certain degree of thermal expansion and contraction. However, due to the different heat absorption capacities of the automotive vehicle lamp cover, the seal strip, and the automotive vehicle lamp base, in a certain environment, although the automotive vehicle lamps do not show leakage, it cannot be avoided that airtightness leakage does not occur in more extreme situations.

[0007] Therefore, it is necessary to design an automotive vehicle lamp testing device and a testing method thereof to solve the above problems. Summary of the Invention

[0008] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an automotive vehicle lamp testing device and a testing method thereof.

[0009] To achieve the above object, the present invention provides the following technical solutions: An automobile headlight testing device, comprising a housing, a testing unit, a control unit, and a control system; The housing is set as a hollow cuboid, and the housing provides a testing environment for headlight detection. The housing includes a bottom plate, an opening and closing plate rotatably connected to one side of the bottom plate, a front panel connected to one side of the bottom plate, and a top plate connected to the top of the front panel; The testing unit is arranged inside the housing. The testing unit is used to place the headlight to be detected, and adopts an infrared thermal imaging detection method to detect the airtightness of the headlight; The testing unit includes a support, four groups of support rods connected to the support, a mounting rack slidably connected to the support rods, a mounting plate connected to the top of the support rods, and an infrared detection module mounted on the bottom of the mounting plate; The control unit is used to control the state of the control system, switch the mode of the control system, and represent the control information of the control system; the control unit includes an air injection valve for injecting detection gas into the headlight; The control system is electrically connected to the housing, the testing unit, and the control unit. The control system receives the control signal transmitted by the control unit and performs corresponding mode and state switching.

[0010] The present invention is further configured as: the testing unit includes a support mounted on the top of the bottom plate. The support is symmetrically provided with holes. The four groups of support rods are distributed along the four corners of the support. The mounting plate is set as a rectangular structure and is adapted to the shape of the support rods.

[0011] The present invention is further configured as: the mounting rack includes two groups of limiting frames slidably connected to the support rods. The two groups of limiting frames are symmetrically arranged facing each other. The bottom of each limiting frame is connected with a limiting cylinder. The limiting cylinder passes through the hole of the support and is connected to the side wall of the limiting frame.

[0012] The present invention is further configured as: two groups of support cylinders are connected to the top of the support. The top of the two groups of support cylinders is connected with a support frame. The support frame is set as a hollow structure, and the support frame is used to place the automobile headlight.

[0013] The present invention is further configured as: the control unit is arranged on the front panel. The control unit includes a control panel arranged on the front panel. A mode switching button is arranged at the bottom of the control panel. A timing knob is installed on one side of the mode switching button. An air injection valve is installed on the side of the mode switching button away from the timing knob. One end of the air injection valve close to the testing unit is connected with an air injection hole; The air injection hole is connected with a rubber hose for injecting gas into the automobile headlight; The control panel is used to input the test parameters required for the test.

[0014] The present invention is further configured such that: the control system includes a mode control unit, a parameter control unit, a testing unit, and a characterization unit; The mode control unit of the control unit is used for mode switching and adopts different detection methods according to whether the vehicle lamp is a new vehicle lamp or an old vehicle lamp; The parameter control unit includes an environment control unit and a pressure control unit. The parameter control unit receives test parameters. The environment control unit controls the temperature inside the housing according to the test parameters and transmits the temperature information inside the housing to the characterization unit for detecting whether gas leakage occurs in the vehicle lamp under different temperature states. The pressure control unit is electrically connected to the air injection hole, and the pressure control unit controls the gas volume injected into the vehicle lamp through the air injection hole according to the test parameters; The testing unit receives the temperature distribution image transmitted by the infrared detection module, divides the temperature distribution image into regions to obtain a temperature grid map and a temperature distribution table, and transmits the temperature grid map and the temperature distribution table; The characterization unit is used to characterize the temperature grid map and the temperature distribution table transmitted by the testing unit and the temperature transmitted by the environment control unit, and characterize the temperature grid map and the temperature distribution table on the liquid crystal screen of the control panel.

[0015] The present invention is further configured such that: the testing unit divides the temperature distribution image through grid division, collects and separates the grids containing the vehicle lamp and the grids not containing the vehicle lamp; and performs color comparison on the temperature distribution image; Among them, according to the precision requirements of vehicle lamp detection, the grid density of the vehicle lamp is selected.

[0016] The present invention is further configured such that: the parameter control unit is electrically connected to the control unit, and the parameter control unit receives the test parameters transmitted by the control unit; Among them, the test parameters include environmental temperature and pressure value.

[0017] A method for testing a vehicle lamp, according to the above-mentioned vehicle lamp testing device, includes the following steps: S1. The operator opens the opening and closing plate, the mounting rack moves downward, and places the vehicle lamp to be tested on the mounting rack; S2. Perform mode switching according to whether the vehicle lamp is a new vehicle lamp or an old vehicle lamp; if it is a new vehicle lamp, execute S3, if it is an old vehicle lamp, execute S4; S3. Perform new vehicle lamp detection; S31. Inject gas into the vehicle lamp through the gas injection valve, let it stand for 5 - 10 minutes, start the infrared detection module, and obtain a temperature distribution image; If the temperatures near the edge of the vehicle lamp are inconsistent, it indicates that the vehicle lamp has leaked; If the temperatures near the edge of the vehicle lamp are consistent, it indicates that the vehicle lamp has not leaked; S4. Conduct inspection on the old vehicle lamp; S41. Inject gas into the vehicle lamp of the vehicle through the gas injection valve, let it stand for 5 - 10 minutes, start the infrared detection module, and obtain the temperature distribution image; If the temperatures near the edge of the vehicle lamp are consistent, it indicates that the vehicle lamp has not leaked; If the temperatures near the edge of the vehicle lamp are inconsistent, it indicates that the vehicle lamp has leaked; perform positioning processing.

[0018] The present invention is further configured as: The positioning processing in S41 includes the following steps: S411. Perform grid division on the temperature distribution image obtained by the infrared detection module; determine the grid division degree according to different precisions; S412. Collect and separate the grid map of the vehicle lamp and the grid map of the environmental area in the temperature distribution image; S413. Further separate the grid map containing the boundary of the vehicle lamp and the grid map without the boundary of the vehicle lamp from the separated grid map of the vehicle lamp; S414. Randomly select a grid in the grid map without the boundary of the vehicle lamp as the reference color, compare each grid map containing the boundary of the vehicle lamp with the reference color, and perform self - comparison on each grid map containing the boundary of the vehicle lamp.

[0019] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present invention provides a stable test environment through the hollow cuboid - shaped housing, ensures the internal temperature is consistent, and avoids test errors caused by inconsistent external temperatures. The test unit adopts the infrared thermal imaging detection method to accurately detect the airtightness of the vehicle lamp. The control unit is responsible for the mode switching and status management of the control system, and receives control signals through the control system to achieve accurate mode and status switching. The overall design ensures the accuracy and reliability of the test results, improves the efficiency and precision of the airtightness detection of the vehicle lamp; moreover, the test unit can perform grid division and analysis on the temperature distribution map detected by the infrared detection module, perform color comparison through grid division and analysis, and achieve precise positioning of the leakage point through color comparison.

[0020] 2. The present invention adjusts according to the height of the automotive headlamp by setting two groups of limit frames. In order to detect clearly, the support frame needs to be as close as possible to the infrared detection module. At the same time, it is necessary to ensure that the automotive headlamp can be completely irradiated by the infrared detection module. During this movement process, it may cause damage to the infrared detection module by the connector or other protruding blocks at a certain part of the headlamp during the movement. Therefore, the two groups of limit frames cooperate with the support frame to move, always staying at the highest point of the automotive headlamp, ensuring that the highest point of the automotive headlamp does not cause damage to the infrared detection module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structure diagram of a testing device for an automotive headlamp according to the present invention.

[0022] Figure 2 is Figure 1 the explosion diagram of

[0023] Figure 3 The structure diagram of the testing unit in the present invention.

[0024] Figure 4 The structure diagram of the mounting bracket in the present invention.

[0025] Figure 5 is Figure 1 the front view of

[0026] Figure 6 The structure diagram of the gas injection valve in the present invention.

[0027] Description of the reference numerals: 1. Housing; 11. Bottom plate; 12. Top plate; 13. Opening and closing plate; 14. Front panel; 2. Testing unit; 21. Support; 22. Support rod; 23. Mounting bracket; 231. Support frame; 232. Support cylinder; 233. Limit frame; 234. Limit cylinder; 24. Mounting plate; 25. Infrared detection module; 3. Control unit; 31. Control panel; 32. Gas injection valve; 33. Gas injection hole; 34. Timing knob; 35. Mode switching button. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0029] It should be pointed out that, unless otherwise specified, all the technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0030] Please refer to Figures 1 - 6 , the present invention provides the following technical solutions: Embodiment 1, please refer to Figures 1 - 6 , an automobile headlight testing device, including a housing 1, a testing unit 2, a control unit 3 and a control system; the housing 1 is set as a hollow cuboid, and the housing 1 provides a testing environment for headlight detection, ensuring that the environmental area temperature inside the housing 1 is consistent, and there is no test result error caused by inconsistent external temperatures; the testing unit 2 is arranged inside the housing 1, and the testing unit 2 is used to place the headlight to be detected, and the airtightness of the headlight is detected by using an infrared thermal imaging detection method; the control unit 3 is used to control the state of the control system, switch the mode of the control system and represent the control information of the control system; the control system is electrically connected to the housing 1, the testing unit 2 and the control unit 3, and the control system receives the control signal transmitted by the control unit 3 and performs corresponding mode and state switching.

[0031] The housing 1 includes a bottom plate 11, and a switchable plate 13 is rotatably connected to one side of the bottom plate 11. The switchable plate 13 is hinged to the bottom plate through a hinge, and the hinge has a light damping, so that the switchable plate 13 can stand upright stably in the vertical direction. A front panel 14 is also connected to one side of the bottom plate 11, and the front panel 14 provides an installation environment for the control unit 3. The top of the bottom plate 11 is connected to a top plate 12.

[0032] The testing unit 2 includes a support 21, and four groups of support rods 22 are installed on the top of the support 21. The support 21 is symmetrically provided with holes, and the four groups of support rods 22 are distributed along the four corners of the support 21. An installation frame is slidably connected to the four groups of support rods 22. The top of the four groups of support rods 22 is connected to an installation plate 24. The installation plate 24 is set as a rectangular structure and is adapted to the shape of the support rods 22. An infrared detection module 25 is installed at the bottom of the installation plate 24.

[0033] The installation frame 23 includes two groups of limit frames 233 slidably connected to the support rods 22. The two groups of limit frames 233 are symmetrically arranged facing each other. A limit cylinder 234 is connected to the bottom of each group of limit frames 233. The limit cylinder 234 passes through the hole of the support 21 and is connected to the side wall of the limit frame 233. Two support cylinders 232 are connected to the top of the support 21, and a support frame 231 is connected to the top of the two support cylinders 232. The support frame 231 is set as a hollow structure, and the support frame 231 is used to place the automobile headlight.

[0034] Specifically, the two groups of limit frames 233 in this embodiment are adjusted according to the height of the automobile headlight. Since accurate detection is required, the support frame 231 needs to be as close as possible to the infrared detection module 25, and at the same time, it is necessary to ensure that the automobile headlight can be completely irradiated by the infrared detection module 25. During this movement process, it may cause damage to the infrared detection module 25 by a connector or other protruding blocks at a certain part of the headlight during the movement. Therefore, the two groups of limit frames 233 cooperate with the support frame 231 to move, and always remain at the highest point of the automobile headlight, ensuring that the highest point of the automobile headlight does not cause damage to the infrared detection module 25.

[0035] Refer to Figure 5 , the control unit 3 is arranged on the front panel 14. The control unit 3 includes a control panel 31 arranged on the front panel 14. The control panel 31 is used to control the control system, including controlling parameters such as the environmental temperature of the test. At the bottom of the control panel 31, there is a mode switching button 35, and the mode switching button 35 facilitates the rapid switching of modes. A timing knob 34 is installed on one side of the mode switching button 35, and the timing knob 34 can adjust the temperature. An air injection valve 32 is installed on the side of the mode switching button 35 away from the timing knob 34. One end of the air injection valve 32 close to the test unit 2 is connected to an air injection hole 33; the air injection hole 33 is connected to a rubber hose for injecting gas into the interior of the automotive headlight.

[0036] Specifically, when the automotive headlight needs to be tested, the operator controls the mode switching button 35 according to whether the automotive headlight to be tested is a new headlight or an old headlight. The operator places the automotive headlight on the support frame 231, and the support frame 231 adjusts its position through the support cylinder 232. The limit frame 233 makes corresponding adjustments according to the height of the headlight, and the adjustment ensures that the automotive headlight can be completely irradiated by the infrared detection module 25 without damaging the infrared detection module 25; the operator inputs the test parameters in the control unit 3 and rotates the timing knob 34 for timing. After the test parameters are input, the operator closes the opening and closing plate 13. When the opening and closing plate 13 is closed, the air injection valve 32 is activated. According to the test parameters, the air injection hole 33 injects gas into the air injection port of the automotive headlight through the rubber hose, and stands still according to the set time of the timing knob 34. After the standing still ends, the infrared detection module 25 is activated to irradiate the automotive headlight, and the irradiation result is transmitted to the test unit for analysis to obtain whether the headlight is airtight.

[0037] Embodiment 2, please refer to Figure 1 — Figure 6 , this Embodiment 2 makes the following improvements on the basis of Embodiment 1. Although the airtightness detection of the automotive headlight can be completed through Embodiment 1, in actual detection, the automotive headlights to be detected include new headlights and old headlights. If there are airtightness problems with the two types of headlights, the means to be taken are different. Therefore, it is necessary to perform detection in different modes. And correspondingly, when there is an airtightness problem with the old headlight, usually repair needs to be considered, and for repair, it is necessary to accurately locate the air leakage point. Therefore, different modes corresponding to different headlights need to be set to solve the above problems.

[0038] In this embodiment, the control system includes a mode control unit, a parameter control unit, a test unit, and a characterization unit.

[0039] The mode control unit, the control unit mode control unit is used for mode switching and adopts different detection methods according to whether the headlight is a new headlight or an old headlight.

[0040] A parameter control unit, which includes an environment control unit and a pressure control unit. The parameter control unit receives test parameters. The environment control unit controls the temperature inside the housing 1 according to the test parameters and transmits the temperature information inside the housing 1 to the characterization unit, which is used to detect whether gas leakage occurs in the vehicle headlight under different temperature states. The pressure control unit is electrically connected to the gas injection hole 33, and the pressure control unit controls the amount of gas injected into the vehicle headlight through the gas injection hole 33 according to the test parameters.

[0041] The parameter control unit is electrically connected to the control unit 3, and the parameter control unit receives the test parameters transmitted by the control unit 3. Among them, the test parameters include the ambient temperature and the pressure value.

[0042] The change in ambient temperature is added during the test because the usage conditions of vehicle headlights are strict and need to adapt to the vast majority of temperatures in the natural environment. It should be considered that there will be a certain degree of thermal expansion and contraction in the vehicle headlight lamp cover, sealing strip, and vehicle headlight base. However, due to the different heat absorption capabilities of the vehicle headlight lamp cover, sealing strip, and vehicle headlight base, in a certain environment, no leakage occurs in the vehicle headlight, but it is impossible to avoid airtightness leakage in more extreme situations. Therefore, it is necessary to measure the airtightness of the same vehicle headlight at different ambient temperatures.

[0043] A test unit, which receives the temperature distribution image transmitted by the infrared detection module 25, divides the area of the temperature distribution image to obtain a temperature grid map and a temperature distribution table, and transmits the temperature grid map and the temperature distribution table.

[0044] A characterization unit, which is used to characterize the temperature grid map and the temperature distribution table transmitted by the test unit and the temperature transmitted by the environment control unit, and characterizes the temperature grid map and the temperature distribution table on the liquid crystal screen of the control panel 31. The characterization unit improves the visibility and interactivity of the test equipment, visually displays the detection results on the liquid crystal screen of the control panel 31, and enables the detection personnel to directly observe where air leakage occurs in the vehicle headlight, facilitating the next repair operation.

[0045] The test unit divides the temperature distribution image through grid division, collects and separates the grids that contain the car headlight and those that do not contain the car headlight; among them, according to the precision requirements of car headlight detection, different selections can be made for the grid density of the car headlight, and various types of selections such as equal can be made; the temperature detected for the image that does not contain the car headlight collected and separated is the ambient temperature in the housing 1, and its ambient temperature is set artificially, so its temperature is meaningless; the temperature detected for the image that contains the car headlight collected and separated is the temperature of the car headlight, but the temperature at the center of the car headlight usually does not change and it is difficult to evaluate the airtightness through the temperature at the center of the car headlight, so it can be used as a reference temperature for comparison.

[0046] Due to the characteristics of the computer, when comparing temperatures, after the grid division is completed, there are still pictures with multiple sets of pixel points. Therefore, in order to achieve accurate comparison, it is necessary to collect the color values of multiple random points or center points in each grid for comparison; since the reference temperature value is the temperature at the center of the car headlight, there will be no temperature fluctuations. Therefore, only the center point color needs to be selected in the car headlight grid. This temperature is implemented through the Pillow library in Python. The specific steps are as follows: A1. Open the temperature distribution image: Use Image.open to open the temperature distribution image file.

[0047] A2. Obtain the size of the temperature distribution image: Use image.size to obtain the width and height of the temperature distribution image.

[0048] A3. Calculate the center point coordinates: Calculate the center point coordinates of the temperature distribution image through the integer division operator.

[0049] A4. Obtain the center point color: Use the image.getpixel method to obtain the color value of the center point.

[0050] However, there are certain problems when taking the temperature values of the grid points including the boundary of the car headlight. If there is only a slight leakage at the boundary of the car headlight, when multiple random points are selected in the grid, there may be a situation where the temperature near the slight leakage point is not collected. If this situation occurs, it will cause the detection of the slight leakage point to fail. Therefore, there are different methods when taking the grid temperature including the car headlight border inspection. Although it is also implemented through the Pillow library in Python, the specific steps are as follows: B1. Open the temperature distribution image: Use Image.open to open the temperature distribution image file.

[0051] B2. Convert to RGB mode: Use image.convert('RGB') to convert the temperature distribution image to RGB mode to ensure that all color values are triples (R, G, B).

[0052] B3. Obtain the size of the temperature distribution image: Use image.size to obtain the width and height of the temperature distribution image.

[0053] B4. Create a color count dictionary: Use defaultdict(int) to create a dictionary to store the occurrence times of each color.

[0054] B5. Traverse the pixels of the temperature distribution image: Use nested loops to traverse each pixel of the temperature distribution image, and use image.getpixel to obtain the color of the pixel.

[0055] B6. Increase the color count: Add the color of each pixel to the dictionary and increase its count.

[0056] B7. Find the most and least frequently occurring colors: Use the max and min functions to find the most and least frequently occurring colors respectively; it should be noted that the max and min functions are built-in functions in Python, used to find the maximum and minimum values in iterable objects (such as lists, tuples, sets, etc.).

[0057] It should be further noted that if there is no leakage in the grid here that contains the boundary of the car headlight, there will be no color change. Therefore, if there is only one color in the picture, the max and min functions will return the same color because the colors of all pixels are the same. Therefore, the output will be the same color value. If this color value is the same as the reference temperature, it means that there is no leakage at this grid; but if this color value is different from the reference temperature color, it means that there is leakage at this grid, and due to the leakage, the entire grid position is at an abnormal temperature.

[0058] If the grid that contains the boundary of the car headlight leaks, there will be different colors in the picture. Then, the max and min functions will return different colors. At this time, it means that there must be leakage. At this time, there is no need to compare the different colors returned by the max and min functions with the reference temperature color. It seems that all grids can adopt the format of self-comparison, and the step of using the reference temperature color in this embodiment is redundant. However, in fact, during the actual detection process, there will be a phenomenon that although the temperature inside the grid points is the same, there has actually been leakage due to inappropriate selection of grid points or too large or too small leakage points. Therefore, both self-comparison and comparison with the reference temperature color should be carried out to ensure the accuracy of the test results.

[0059] The present invention provides a stable test environment through the hollow cuboid-shaped housing 1 to ensure consistent internal temperature and avoid test errors caused by inconsistent external temperatures. The test unit 2 uses infrared thermal imaging detection to accurately detect the airtightness of the vehicle lamp. The control unit 3 is responsible for the mode switching and status management of the control system, and receives control signals through the control system to achieve accurate mode and status switching. The overall design ensures the accuracy and reliability of the test results, improving the efficiency and accuracy of the airtightness detection of vehicle lamps; moreover, the test unit 2 can perform grid division and analysis on the temperature distribution map detected by the infrared detection module 25, conduct color comparison through grid division and analysis, and achieve precise positioning of the leakage point through color comparison.

[0060] Embodiment 3: This Embodiment 3 makes the following improvements on the basis of Embodiment 1 and Embodiment 2. Although the airtightness detection of automotive headlights and temperature-color comparison can be completed through Embodiment 1 and Embodiment 2, it should be further noted that when it is necessary to perform as little glue filling as possible (this situation is usually applied to special vehicles or special requirements of automotive headlight users), more precise positioning is required. In this case, the comparison situation in Embodiment 2 needs to be replaced to perform more precise leakage point positioning.

[0061] Specifically, the methods for obtaining the center point temperature of the automotive headlight and obtaining the colors with the least and most occurrences among the boundary grids of the automotive headlight do not change. However, after using the max and min functions to find the colors with the most and least occurrences respectively, further processing is required.

[0062] In Embodiment 2, after the max and min functions return different colors, it is directly determined that leakage has occurred at that grid point. However, this method does not perform precise positioning, but only locates to that grid. If more precise positioning is required, the positioning method is: divide this grid into multiple groups of grids again, and each group of grids is compared with the temperature of the reference grid point again as in Embodiment 2. It should be noted that at this time, the color of the reference temperature does not change, but only further precise positioning is performed to locate to a more precise grid point.

[0063] Embodiment 4: An automotive headlight test method, according to an automotive headlight test device, includes the following steps: S1. The operator opens the opening and closing plate 13, and the mounting rack 23 moves downward to place the automotive headlight to be tested on the mounting rack 23; S2. Perform mode switching according to whether the automotive headlight is a new headlight or an old headlight; if it is a new headlight, execute S3, if it is an old headlight, execute S4; S3. Conduct new headlight detection; S31. Inject gas into the vehicle headlight through the gas injection valve 32, let it stand for minutes, start the infrared detection module 25, and obtain the temperature distribution image; If the temperatures near the edge of the headlight are inconsistent, it indicates that the headlight has leaked; If the temperatures near the edge of the headlight are consistent, it indicates that the headlight has not leaked; S4. Conduct an old headlight inspection; S41. Inject gas into the vehicle headlight through the gas injection valve 32, let it stand for minutes, start the infrared detection module 25, and obtain the temperature distribution image; If the temperatures near the edge of the headlight are consistent, it indicates that the headlight has not leaked; If the temperatures near the edge of the headlight are inconsistent, it indicates that the headlight has leaked; perform positioning processing.

[0064] In this embodiment, specifically: The positioning processing in S41 includes the following steps: S411. Perform grid division according to the temperature distribution image obtained by the infrared detection module 25; determine the grid division degree according to different precisions; S412. Collect and separate the grid map of the vehicle headlight and the grid map of the environmental area in the temperature distribution image; S413. Further separate the grid map containing the headlight boundary and the grid map without the headlight boundary from the separated grid map of the vehicle headlight; S414. Randomly select a grid in the grid map without the headlight boundary as the reference color, compare each grid map containing the headlight boundary with the reference color, and compare each grid map containing the headlight boundary with itself.

[0065] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

Claims

1. An automobile lamp testing device, characterized in that: It comprises a housing (1), a test unit (2), a control unit (3) and a control system; The housing (1) is configured to be a hollow rectangular parallelepiped, and the housing (1) provides a test environment for vehicle lamp detection. The housing (1) comprises a bottom plate (11), an opening and closing plate (13) rotatably connected to one side of the bottom plate (11), a front panel (14) connected to one side of the bottom plate (11), and a top plate (12) connected to the top of the front panel (14); The test unit (2) is arranged inside the housing (1), and is used to place the vehicle lamp to be tested, and to test the air tightness of the vehicle lamp using an infrared thermal imaging test method; The test unit (2) comprises a support (21), four groups of support rods (22) connected to the support (21), a mounting frame (23) slidably connected to the support rods (22), a mounting plate (24) connected to the top of the support rods (22), and an infrared detection module (25) mounted on the bottom of the mounting plate (24); The control unit (3) is used to control the state of the control system, switch the mode of the control system, and characterize the control information of the control system; the control unit (3) comprises a gas injection valve (32) for injecting detection gas into the interior of the vehicle lamp; The control system is electrically connected to the housing (1), the test unit (2), and the control unit (3), and the control system receives a control signal transmitted by the control unit (3) and performs corresponding mode and state switching; The control system includes a mode control unit, a parameter control unit, a test unit, and a characterization unit; The test unit receives the temperature distribution image transmitted by the infrared detection module (25), divides the temperature distribution image into regions, obtains a temperature grid map and a temperature distribution table, and transmits the temperature grid map and the temperature distribution table; The testing unit collects and separates the grids containing the automobile lights and the grids not containing the automobile lights, and performs color comparison on the temperature distribution images; Among them, the grid density of the automobile lights is selected according to the precision requirements of automobile light detection.

2. The vehicle lamp testing equipment according to claim 1, characterized in that: The test unit (2) comprises a support (21) mounted on the top of the base plate (11), the support (21) being symmetrically provided with holes, four groups of support rods (22) being distributed along the four corners of the support (21), and the mounting plate (24) being arranged in a rectangular structure and adapted to the shape of the support rods (22).

3. The vehicle lamp testing device according to claim 2, characterized in that: The mounting frame (23) comprises two groups of limit frames (233) slidably connected to the support rod (22), the two groups of limit frames (233) being symmetrically arranged facing each other, the bottom of each group of limit frames (233) being connected to a limit cylinder (234), and the limit cylinder (234) passing through a hole of the support (21) and connected to a side wall of the limit frame (233).

4. The vehicle lamp testing device according to claim 3, characterized in that: Two groups of supporting cylinders (232) are connected to the top of the support (21), and a supporting frame (231) is connected to the top of the two groups of supporting cylinders (232). The supporting frame (231) is configured as a hollow structure, and the supporting frame (231) is used to place a car lamp.

5. The vehicle lamp testing device according to claim 4, characterized in that: The control unit (3) is arranged on the front panel (14), and the control unit (3) comprises a control panel (31) arranged on the front panel (14), a mode switching button (35) is arranged at the bottom of the control panel (31), a timing knob (34) is installed on one side of the mode switching button (35), a gas injection valve (32) is installed on the side of the mode switching button (35) away from the timing knob (34), and a gas injection hole (33) is connected to the end of the gas injection valve (32) close to the test unit (2); The gas injection hole (33) is connected to a rubber hose and is used to inject gas into the interior of the automobile lamp; The control panel (31) is used to input test parameters required for the test.

6. The vehicle lamp testing device according to claim 5, characterized in that: The mode control unit is used to switch the mode and adopt different detection methods according to whether the headlight is a new headlight or an old headlight; The parameter control unit comprises an environment control unit and a pressure control unit. The parameter control unit receives a test parameter, controls the temperature inside the housing (1) according to the test parameter, and transmits the temperature information inside the housing (1) to the characterization unit, so as to detect whether the vehicle lamp has gas leakage under different temperature conditions. The pressure control unit is electrically connected to the gas injection hole (33), and controls the amount of gas injected into the vehicle lamp through the gas injection hole (33) according to the test parameter. The characterization unit is used to characterize the temperature grid map and temperature distribution table transmitted by the test unit and the temperature transmitted by the environment control unit, and to characterize the temperature grid map and the temperature distribution table on the liquid crystal screen of the control panel (31).

7. The vehicle lamp testing device according to claim 6, characterized in that: The parameter control unit is electrically connected to the control unit (3), and the parameter control unit receives the test parameters transmitted by the control unit (3); Among them, the test parameters include ambient temperature and pressure value.

8. A method for testing automobile lamps, using an automobile lamp testing device as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1. An operator opens the opening and closing plate (13), moves the mounting frame (23) downward, and places the automobile lamp to be tested on the mounting frame (23); S2, switching the mode according to whether the car headlight is a new headlight or an old headlight; if it is a new headlight, executing S3, if it is an old headlight, executing S4; when switching the mode, the staff can press the corresponding button; S3, test the new headlights; S31, injecting gas into the automobile lamp through the gas injection valve (32), leaving it to stand for 5-10 minutes, and starting the infrared detection module (25) to obtain a temperature distribution image; If the temperature near the edge of the headlight is inconsistent, it means that the headlight has a leak; If the temperature near the edge of the lamp is consistent, it means that the lamp is not leaking; S4. Detect old car lights; S41, injecting gas into the automobile lamp through the gas injection valve (32), leaving it to stand for 5-10 minutes, and starting the infrared detection module (25) to obtain a temperature distribution image; If the temperature near the edge of the lamp is consistent, it means that the lamp is not leaking; If the temperature near the edge of the headlight is inconsistent, it means that the headlight has a leak; perform positioning processing.

9. The vehicle lamp testing method according to claim 8, characterized in that: The positioning process in S41 includes the following steps: S411, performing grid division according to the temperature distribution image obtained by the infrared detection module (25); determining the degree of grid division according to different accuracies; S412, collecting and separating the vehicle headlight grid map and the environmental area grid map in the temperature distribution image; S413, separating the separated automobile light grid map into a grid map containing the automobile light boundary and a grid map excluding the automobile light boundary; S414, randomly selecting a grid in the grid map that does not contain the boundary of the car lights as a reference color, comparing each grid map that contains the boundary of the car lights with the reference color, and comparing each grid map that contains the boundary of the car lights with itself.

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