Device for measuring downward inclination angle of automobile dipped headlight

Abstract

The utility model relates to the technical field of vehicle illumination detection, and discloses an automobile dipped headlight downward inclination angle measuring device, which comprises a base, a measuring unit is arranged on the base, the measuring unit comprises a laser emitting module and an image acquisition module, the laser emitting module emits laser and forms a reference light spot, and the image acquisition module acquires the reference light spot. The image acquisition module acquires the reference light spot and the test light spot and forms image data, and the algorithm module can receive the image data sent by the image acquisition module and analyze and calculate the inclination angle. Interference factors such as asthenopia and subjective cognitive differences of manual observation are eliminated, and objectivity and accuracy of measurement results are remarkably improved. And the environmental adaptability and practicability of the device are improved. The equipment maintenance time and labor cost are reduced, and the economic burden of an enterprise is relieved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lighting detection technology, specifically to a device for measuring the tilt angle of automotive low beam headlights. Background Technology

[0002] In automotive lighting systems, the low beam tilt angle is a key parameter related to nighttime driving safety. A proper low beam tilt angle ensures that light is accurately projected onto the road surface, avoiding glare for oncoming drivers while guaranteeing sufficient illumination range, thus significantly improving nighttime driving safety and comfort.

[0003] Currently, the measurement of the tilt angle of automotive low beam headlights typically relies on manual visual adjustment or complex optical instruments. Manual visual adjustment depends primarily on the operator's experience and visual observation to judge and adjust the tilt angle. This method is susceptible to errors due to factors such as the operator's subjective perception, eyesight, and fatigue, making it difficult to meet high-precision testing requirements. While measurement methods based on complex optical instruments can improve accuracy to some extent, these devices often require multiple calibrations, resulting in cumbersome procedures and low testing efficiency. Furthermore, these devices have stringent environmental requirements, typically operating in darkrooms, making them unsuitable for conventional production environments like workshops, significantly limiting their practical application. In addition, high-precision optical equipment is not only expensive but also complex to maintain, leading to high operating and maintenance costs and increasing the economic burden on enterprises. Utility Model Content

[0004] The present invention aims to provide a device for measuring the tilt angle of automotive low beam headlights, thereby providing a low-cost and high-precision measuring device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a device for measuring the tilt angle of automotive low beam headlights, comprising a base, a measuring unit disposed on the base, the measuring unit comprising a laser emitting module and an image acquisition module, the laser emitting module emitting laser light and forming a reference light spot, the image acquisition module acquiring the reference light spot and the test light spot and forming image data, and an algorithm module capable of receiving the image data sent by the image acquisition module and analyzing and calculating the tilt angle.

[0006] The beneficial effects of this solution are as follows: 1. The laser beam emitted by the laser emission module has high collimation and can form a stable reference spot, providing an accurate reference for the measurement of the downtilt angle and avoiding errors caused by subjective judgment in manual visual adjustment; the image acquisition module captures the reference spot and the test spot formed by the low beam illumination in real time, and performs digital analysis on the image data through the algorithm module (such as spot position deviation, geometric angle calculation, etc.), eliminating interference factors such as visual fatigue and subjective cognitive differences caused by human observation, and significantly improving the objectivity and accuracy of the measurement results.

[0007] 2. Without the need for repeated manual adjustments or calibration steps relying on complex optical instruments, the device completes the measurement through an automated process of "laser projection → image acquisition → algorithm calculation," greatly simplifying the operation steps and shortening the single detection time. At the same time, it does not require special detection environments such as darkrooms and can be used directly in conventional production scenarios such as workshops, breaking through the limitations of traditional optical instruments' sensitivity to ambient light and improving the device's environmental adaptability and practicality.

[0008] 3. Compared with traditional high-precision optical instruments (such as dedicated photometers and complex optical path systems), the hardware cost of laser emission modules and image acquisition modules (such as industrial cameras) is significantly reduced, and they are compact and easy to integrate. They do not require frequent calibration or maintenance by professional technicians. The algorithm module can optimize the measurement logic through software upgrades, which reduces the time and labor costs of equipment maintenance and alleviates the economic burden on enterprises.

[0009] Furthermore, an adjustment component is provided below the base. One end of the adjustment component is threaded to the base, and the angle of the mounting surface can be adjusted by adjusting the distance between the free end of the adjustment component and the base.

[0010] Beneficial effects: By setting an adjustment piece under the base, when the ground being measured is uneven, the user can level the base using the adjustment piece, reducing the need to use various methods to make the base level before measurement, such as raising one side of the base, thereby reducing the preparation work before measurement.

[0011] Furthermore, a caster wheel is fixed to the lower end of the adjusting component. This caster wheel design allows the measuring device to be easily moved to the measuring site, reducing the amount of measuring equipment required.

[0012] Furthermore, a level is fixedly installed on the base. This level allows users to visually observe the base's levelness, facilitating easy adjustment of the base's mounting surface.

[0013] Furthermore, a vertical slide rail is fixedly installed on the upper surface of the base, and both the image acquisition module and the laser generation module are slidably mounted on the slide rail. The slide rail allows for height adjustment of the image acquisition module and the laser generation module, accommodating vehicles of different heights.

[0014] Furthermore, the algorithm module integrates a formula for calculating the downtilt angle using the difference in coordinates between the centers of the two light spots.

[0015] Furthermore, the algorithm module also integrates distortion correction and temperature drift compensation.

[0016] Furthermore, the image acquisition module's acquisition end is equipped with a narrowband filter whose transmission wavelength matches the laser light wave. By setting the transmission wavelength of the narrowband filter to match the laser wavelength, it can be ensured that only light of a specific wavelength generated by the laser can pass through the filter and be captured by the image acquisition module, thereby improving the accuracy and signal-to-noise ratio of image acquisition. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of Embodiment 1 of the present invention;

[0018] Figure 2 This is a schematic diagram of the base of Embodiment 2 of this utility model. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method:

[0020] The reference numerals in the accompanying drawings include: base 11, caster wheel 111, slide rail 12, mounting base 13, and image acquisition module 21.

[0021] Example 1

[0022] Example 1 is basically as shown in the appendix. Figure 1 As shown, Figure 1 The device shown is a car low beam headlight tilt angle measuring device, including a support assembly and a measuring assembly. The support assembly includes a base 11, a slide rail 12 and a mounting seat 13. A caster wheel 111 is welded to the bottom of the base 11. The upper surface of the base 11 is a mounting surface. The slide rail 12 is fixed on the mounting surface and is perpendicular to the mounting surface. The mounting seat 13 is slidably disposed on the slide rail 12.

[0023] The measurement components include an image acquisition module 21, a laser emission module, and an algorithm module. Both the image acquisition module 21 and the laser emission module are fixed on the mounting base 13. The image acquisition module 21 is a device that can acquire image data and is electrically connected to the algorithm module. In this embodiment, the image acquisition module 21 is a high-resolution CCD / CMOS camera. The laser emission module can emit laser light. The algorithm module can extract the light spot coordinate data in the image data sent by the image acquisition module 21 and calculate the downtilt angle based on the extracted coordinate data.

[0024] The specific implementation process is as follows:

[0025] First, park the vehicle in the measurement area and turn on the low beam headlights so that the low beam headlights illuminate the test surface, and a test light spot is formed at the boundary between the bright and dark areas of the low beam headlights.

[0026] Secondly, the device is leveled to ensure that the laser beam emitted by the laser emitting module is parallel to the ground reference line. Then, the laser emitting module is controlled to project the laser along the direction of the vehicle's low beam headlights and form a reference spot on the test plane. The image acquisition module 21 captures and extracts the image data of the reference spot and the test spot, and sends it to the algorithm module. Finally, the algorithm module receives the image data sent by the image acquisition module 21 and extracts the center coordinates (X1, Y1) of the reference spot and the center coordinates (X2, Y2) of the test spot from the image data. The low beam headlight tilt angle is obtained by using the extracted center coordinates (X1, Y1) of the reference spot and the center coordinates (X2, Y2) of the test spot, as well as the built-in tilt angle calculation formula.

[0027] The formula for calculating the downslope angle θ using geometric relationships is as follows:

[0028] θ=arctan{|Y2-Y1|} / {|X2-X1|}

[0029] Example 2

[0030] Example 2 is basically the same as Example 1, except that, as Figure 2 As shown, an adjusting component is provided between the base 11 and the universal wheel 111. The universal wheel 111 is welded to the lower end of the adjusting component, and the upper end of the adjusting component is threadedly connected to the base 11. A level is embedded in the mounting surface. During use, by observing the state of the level, the depth of the upper end of the adjusting component screwed into the base 11 is adjusted to ensure that the mounting surface is in a horizontal state, thereby ensuring that the slide rail 12 is in a vertical state.

[0031] The image acquisition module 21 has a narrowband filter at its acquisition end, and the transmission wavelength of the narrowband filter is matched with the laser light wave. By setting the transmission wavelength of the narrowband filter to match the laser wavelength, it can be ensured that only light of a specific wavelength generated by the laser can pass through the filter and be captured by the image acquisition module 21, thereby improving the accuracy and signal-to-noise ratio of image acquisition.

[0032] Example 3

[0033] Based on Example 1, a calibration plate is fixed on the test surface. The standard calibration plate has a grid composed of horizontal and vertical lines. The light spots generated by the low beam lamp and the laser emission module are all mapped onto the standard calibration plate, facilitating coordinate extraction. The above descriptions are merely embodiments of this utility model; common technical solutions and / or characteristics are not described in detail here. It should be noted that the technical means used to solve problems in the above embodiments of this utility model can be combined to solve multiple technical problems simultaneously. For those skilled in the art, several modifications and improvements can be made without departing from the technical solution of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for measuring the tilt angle of automotive low beam headlights, characterized in that: The device includes a base, on which a measurement unit is mounted. The measurement unit includes a laser emission module and an image acquisition module. The laser emission module emits a laser and forms a reference light spot. The image acquisition module acquires the reference light spot and the test light spot and forms image data. The algorithm module can receive the image data sent by the image acquisition module and analyze and calculate the tilt angle.

2. The device for measuring the tilt angle of automotive low beam headlights according to claim 1, characterized in that: An adjustment component is provided at the bottom of the base. One end of the adjustment component is threaded to the base, and the angle of the mounting surface can be adjusted by adjusting the distance between the free end of the adjustment component and the base.

3. The device for measuring the tilt angle of automotive low beam headlights according to claim 2, characterized in that: The lower end of the adjusting component is fixed with a movable wheel.

4. The device for measuring the tilt angle of automotive low beam headlights according to claim 3, characterized in that: A level is fixedly installed on the base.

5. The automotive low beam headlight tilt angle measuring device according to claim 4, characterized in that: A vertical slide rail is fixedly installed on the upper surface of the base, and the image acquisition module and the laser generation module are both slidably mounted on the slide rail.

6. The device for measuring the tilt angle of automotive low beam headlights according to claim 5, characterized in that: The algorithm module integrates a formula for calculating the downtilt angle using the difference in coordinates between the centers of the two light spots.

7. The automotive low beam headlight tilt angle measuring device according to claim 6, characterized in that: The algorithm module also integrates distortion correction and temperature drift compensation.

8. The device for measuring the tilt angle of automotive low beam headlights according to claim 7, characterized in that: The image acquisition module is equipped with a narrowband filter at its acquisition end, and the transmission wavelength of the narrowband filter matches the light wave of the laser.

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