Vehicle lamp positioning system of whole vehicle
Through the assisted positioning device of the headlight and imaging measurement technology, the problems of large errors, low efficiency or high cost of the headlight positioning are solved, and the fast and accurate positioning of the reference point of the headlight is achieved. It is suitable for vehicle lighting performance tests and provides high efficiency , low-cost solutions.
Patent Information
- Application Number
- CN202420294201.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-18
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-02-18
AI Technical Summary
The existing car light positioning methods have problems such as large positioning error, low measurement efficiency or high cost. In particular, manual manual measurements rely on subjective judgment and low accuracy, and mechanical three-coordinate measuring instruments are expensive.
The vehicle light auxiliary positioning device and imaging measurement device are adopted, and the position relationship of the reference point of the vehicle light is quickly and accurately obtained through components such as base, vertical support column, cross bar and distance measuring sensor, combined with imaging measurement technology, and replaced traditional mechanical measurement. Achieve high-precision positioning of the reference points of the headlights.
It realizes fast, accurate and low-cost positioning of the car lights, simplifies the operating process, reduces the measurement cost, and improves the measurement accuracy. It is suitable for vehicle lighting performance tests.
Smart Images
Figure CN222280109U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of vehicle lamp detection, in particular to a vehicle lamp positioning system. Background Art
[0002] The quality of motor vehicle lights is of great significance to safe driving at night. The width, distance and glare of the high and low beams of the headlights are important evaluation indicators of motor vehicle lighting performance. At present, the China New Car Program (C-NCAP) proposes to use the static indoor evaluation method of the whole vehicle for evaluation. The "C-NCAP Management Rules (2024 Edition)" also explains the test method for the whole vehicle lighting performance. The vehicle is parked at the test station, and the optical test screen is located 25m away from the zero line origin of the vehicle road. Then the left and right lights are covered respectively to measure the lighting performance, and then the data is synthesized and converted based on the spatial position of the light reference point. It can be seen that the accurate positioning of the lights is very critical.
[0003] There are two main ways to locate existing headlights. The first is manual measurement. Due to the special irregular shapes such as curved surfaces in the design of headlights, this measurement method mainly relies on human subjective judgment, with low measurement accuracy and efficiency, and poor operability. The second is to use a three-dimensional coordinate measuring instrument. The three-dimensional coordinate measuring instrument is an instrument that measures by taking three-dimensional points. It is mainly composed of a mechanical system (X, Y, Z axes, etc.), detection sensors, control systems, and data processing systems. The measurement principle is to obtain the spatial point position of the unit to be measured by coordinating the movement of the detection sensor and the mechanical system to measure the spatial axis. Through a series of mathematical calculations, the spatial coordinates of the headlight reference point are obtained. This measurement method has high measurement accuracy, but the instrument is expensive. Utility Model Content
[0004] In view of the shortcomings of the prior art, the utility model provides a whole vehicle headlight positioning system to meet the needs of whole vehicle lighting performance testing and solve the current problems of large headlight positioning errors, low measurement efficiency or high cost. The headlight auxiliary positioning device can effectively locate the headlight reference point, has a simple structure, is easy to operate, has low measurement cost and high measurement accuracy.
[0005] The utility model discloses a whole vehicle headlight positioning system, comprising a headlight auxiliary positioning device and a first imaging measurement device, wherein the headlight auxiliary positioning device comprises a base, a vertical support column, a first cross bar and a second cross bar, wherein the vertical support column is installed on the base, the first cross bar and the second cross bar are arranged vertically and parallelly on the vertical support column, and the end tip of the first cross bar and the marking point on the second cross bar are always on the same vertical axis, the first cross bar and the second cross bar can move up and down along the vertical support column to align the end tip of the first cross bar with the headlight reference point; the first imaging measurement device is arranged above the vehicle, and the measurement field covers the front end of the vehicle.
[0006] The utility model uses a headlight auxiliary positioning device to locate the headlight reference point, and can obtain the height of the headlight reference point, that is, obtain the up-down position relationship of the headlight reference point relative to the vehicle body. The first imaging measurement device can also obtain the front-back, left-right, left-right relative position relationship of the headlight reference point and the vehicle body, and then accurately obtain the front-back, left-right, left-right, up-down position relationship of the headlight reference point relative to the vehicle. Specifically, the measurement field of the first imaging measurement device covers the vehicle and the marker point on the second crossbar. A mapping relationship between the pixel coordinate system of the first imaging measurement device and the world coordinate system is established, and the marker point on the second crossbar and the vehicle body reference point correspond to a certain pixel point or pixel area in the picture taken by the first imaging measurement device respectively. The position relationship of the headlight reference point relative to the vehicle body reference point on the horizontal plane is obtained according to the coordinate conversion, and the plane position relationship includes the longitudinal and lateral lengths. Further combined with the height of the headlight reference point, the position coordinates of the headlight reference point relative to the vehicle body can be obtained. In the subsequent vehicle lighting performance test, the spatial light intensity distribution with the headlight reference point as the origin can be further calculated based on the relative position relationship between the headlight reference point and the vehicle body and combined with the coordinate conversion. It should be noted that the height of the vertical support column of the utility model covers the height of the front of most vehicles, and the marking point on the second cross bar can be a target plate, which is convenient for locating the relative position relationship between the headlights and the vehicle body.
[0007] In the above technical solution, the first crossbar and the second crossbar can be a mechanical fixing mechanism or a telescopic mechanism, that is, they can be telescoped forward and backward. Specifically, the first crossbar and the second crossbar are parallel double synchronous telescopic mechanisms, and when the first crossbar is telescoped to the reference point of the headlight, the second crossbar is synchronously telescoped to the same horizontal length, so that the first crossbar and the second crossbar always maintain a concentric and coaxial state.
[0008] Furthermore, it also includes a second imaging measurement device, the measurement field of the second imaging measurement device covers the auxiliary positioning device for the headlights; the second imaging measurement device is used to obtain the height information of the headlight reference point. Specifically, the second imaging measurement device can be set in front of the front of the vehicle and face the vehicle body for shooting. A mapping relationship between the pixel coordinate system of the second imaging measurement device and the world coordinate system is established, and the headlight reference point and the vehicle body reference point correspond to a certain pixel point or pixel area in the picture taken by the second imaging measurement device, respectively. The position relationship of the headlight reference point relative to the vehicle body reference point on the vertical plane is obtained according to the coordinate conversion, or the height information of the headlight reference point is obtained by conversion.
[0009] Furthermore, the headlight auxiliary positioning device is also provided with a distance measuring sensor, which is used to obtain the height of the first cross bar; or the vertical support column is provided with a scale, which can directly read the height of the first cross bar and then obtain the height of the headlight reference point.
[0010] Furthermore, the evenly-fixed device at the lower end of the base has three or more universal wheels, which facilitates movement to align with the reference point of the headlight.
[0011] Furthermore, the headlight auxiliary positioning device further includes a transmission unit, and the vertical support column is connected to the base through the transmission unit. Specifically, the transmission device includes a rotation mechanism and / or a translation mechanism, the translation mechanism enables the vertical support column to move in the front-back and left-right directions, and the rotation mechanism enables the vertical support column to rotate left-right, so as to meet the testing requirements of different headlight heights, and at the same time facilitate the headlight auxiliary positioning device to align with the headlight reference point for easy measurement.
[0012] Furthermore, the vertical support column is respectively provided with multiple layers of sleeve columns stacked from outside to inside, and each layer of sleeve columns can slide up and down along the inner wall of a layer of sleeve columns outside it, forming a lifting mechanism capable of adjusting the height of the first crossbar. Alternatively, it also includes a first clamping movable block and a second clamping movable block that can slide up and down on the vertical support column, and locking bolts are provided at both ends of the first clamping movable block and the second clamping movable block, and the first clamping movable block is fixedly connected to the first crossbar, and the second clamping movable block is fixedly connected to the second crossbar.
[0013] Furthermore, the vehicle lamp auxiliary positioning device is also provided with a calibrator for vertically calibrating the vertical support column.
[0014] Beneficial effects of the utility model: The utility model patent provides a whole vehicle headlight positioning system, which uses an imaging measurement device and a headlight auxiliary positioning device to quickly and accurately obtain the position relationship of the headlight reference point relative to the vehicle, replacing a mechanical three-coordinate measuring instrument, and is easy to operate, low cost, and accurate in measurement. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A schematic diagram of the structure of a vehicle headlight positioning system provided in the first embodiment of the utility model;
[0016] Figure 2 A schematic diagram of the structure of the vehicle light auxiliary positioning device provided in the first embodiment of the utility model;
[0017] Figure 3 A schematic diagram of another vehicle headlight positioning system structure provided in the second embodiment of the utility model;
[0018] In the figure: 1-vehicle, 2-headlight auxiliary positioning device, 3-first imaging measurement device, 4-base, 5-vertical support column, 6-first crossbar, 7-second crossbar, 8-second imaging measurement device, 9-marking point on the second crossbar. DETAILED DESCRIPTION Embodiment 1
[0019] This embodiment provides a vehicle headlight positioning system. Figure 1 As shown, it includes a test station for parking a vehicle 1, a headlight auxiliary positioning device 2, and a first imaging measurement device 3. Figure 2 As shown, the headlight auxiliary positioning device 2 includes a base 4, a vertical support column 5, a first cross bar 6 and a second cross bar 7; the vertical support column 5 is installed on the base 4, and a scale is provided on the vertical support column 5. The first cross bar 6 and the second cross bar 7 are arranged on the vertical support column 5 in parallel, and the first cross bar 6 is located below the second cross bar 7. The end of the second cross bar 7 away from the vertical support column 5 has a circular target plate, and the center of the circular target plate is the marking point 9 on the second cross bar. The tip of the first cross bar 6 and the center of the target plate on the second cross bar are always on the same vertical axis. The first cross bar 6 and the second cross bar 7 can move up and down along the vertical support column 5 to align the tip of the first cross bar 6 with the headlight reference point; the first imaging measurement device 3 is located above the vehicle body, and the measurement field of view covers the front end of the vehicle 1. In this embodiment, the tip of the first crossbar 6 is aligned with the headlight reference point, and the scale of the first crossbar 6 on the vertical support column 5 can be directly read, that is, the height of the headlight reference point can be obtained; the image taken by the first imaging measurement device 3 can obtain the front, rear, left, and right two-dimensional position relationship of the mark point 9 on the second crossbar relative to the vehicle body, that is, the front, rear, left, and right two-dimensional position relationship of the headlight reference point relative to the vehicle body; and then the front, rear, left, right, and top and bottom position relationship of the headlight reference point relative to the vehicle can be obtained. In the actual vehicle lighting performance test method, according to the phase position relationship between the headlight reference point and the vehicle, combined with the coordinate translation transformation and rotation transformation, the spatial light intensity distribution with the headlight reference point as the origin can be further calculated. Embodiment 2
[0020] This embodiment provides a vehicle headlight positioning system. Figure 3 As shown, it includes a vehicle 1, a headlight auxiliary positioning device 2, a first imaging measurement device 3 and a second imaging measurement device 8; the headlight auxiliary positioning device 2 includes a base 4, a vertical support column 5, a first cross bar 6 and a second cross bar 7; the vertical support column 5 is installed on the base 4, the first cross bar 6 and the second cross bar 7 are arranged on the vertical support column 5 in parallel, the first cross bar 6 and the second cross bar 7 are parallel double-linked synchronous telescopic mechanisms, when the first cross bar 6 is telescoped to the headlight reference point, the second cross bar 7 is synchronously telescoped to the same horizontal length, that is, the tip of the first cross bar 6 and the mark point 9 on the second cross bar 7 are always on the same vertical axis, the first cross bar 6 is located below the second cross bar 7, the first cross bar 6 and the second cross bar 7 can move up and down along the vertical support column 5 to align the tip of the first cross bar 6 with the headlight reference point; the first imaging measurement device 3 is located above the vehicle body, and the measurement field covers the vehicle 1 and the mark point 9 on the second cross bar 7, and the second imaging measurement device 8 is located in front of the vehicle head, and the measurement field covers the headlight auxiliary positioning device 2.
[0021] Preferably, the vehicle lamp auxiliary positioning device 2 is also provided with a calibrator for vertically calibrating the vertical support column 5 .
[0022] Preferably, the vehicle lamp auxiliary positioning device 2 further includes a transmission unit, and the vertical support column 5 is connected to the base 4 via the transmission unit. The transmission unit is a translation mechanism, so that the vertical support column can move in the front-rear and left-right directions.
[0023] Preferably, the vertical support column 5 is provided with multiple layers of sleeve columns stacked from outside to inside, and each layer of sleeve columns can slide up and down along the inner wall of the outer layer of sleeve columns, forming a lifting mechanism capable of adjusting the height of the first cross bar 6.
[0024] The specific implementation methods of the present invention are described above in conjunction with the accompanying drawings, but those skilled in the art should understand that the above embodiments are only for illustration and are not intended to limit the scope of the present invention. Those skilled in the art should understand that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of protection of the present invention is defined by the appended claims.
Claims
1. A vehicle headlight positioning system, characterized in that: The invention comprises a headlight auxiliary positioning device (2) and a first imaging measurement device (3), wherein the headlight auxiliary positioning device (2) comprises a base (4), a vertical support column (5), a first cross bar (6) and a second cross bar (7), wherein the vertical support column (5) is mounted on the base (4), the first cross bar (6) and the second cross bar (7) are arranged vertically and parallelly on the vertical support column (5), and the tip of the first cross bar (6) and the marking point (9) on the second cross bar (7) are always on the same vertical axis, and the first cross bar (6) and the second cross bar (7) can be moved vertically along the vertical support column (5) to align the tip of the first cross bar (6) with the headlight reference point; and the first imaging measurement device (3) is arranged above the vehicle (1), and the measurement field covers the front end of the vehicle (1).
2. A vehicle headlight positioning system according to claim 1, characterized in that: The first cross bar (6) and the second cross bar (7) are parallel double-linked synchronous telescopic mechanisms, and when the first cross bar (6) is telescoped to a reference point of the vehicle light, the second cross bar (7) is synchronously telescoped to the same horizontal length.
3. A vehicle headlight positioning system according to claim 1 or 2, characterized in that: It also comprises a second imaging measurement device (8), wherein the measurement field of view of the second imaging measurement device (8) covers the vehicle light auxiliary positioning device (2).
4. A vehicle headlight positioning system according to claim 1 or 2, characterized in that: The vehicle light auxiliary positioning device (2) is further provided with a distance measuring sensor, the distance measuring sensor being used to obtain the height of the first crossbar (6); or the vertical support column (5) is provided with a scale.
5. A vehicle headlight positioning system according to claim 1 or 2, characterized in that: Three or more universal wheels are evenly and fixedly mounted on the lower end of the base (4).
6. A vehicle headlight positioning system according to claim 1 or 2, characterized in that: The vehicle lamp auxiliary positioning device (2) further comprises a transmission unit, and the vertical support column (5) is connected to the base (4) via the transmission unit, and the transmission unit is a rotation mechanism and / or a translation mechanism.
7. A vehicle headlight positioning system according to claim 1 or 2, characterized in that: The vertical support column (5) is provided with multiple layers of sleeve columns stacked from the outside to the inside, and each layer of sleeve columns can slide up and down along the inner wall of a layer of sleeve columns outside it, forming a lifting mechanism capable of adjusting the height of the first cross bar (6); or it also includes a first clamping movable block and a second clamping movable block that can slide up and down along the vertical support column (5), and locking bolts are provided at both ends of the first clamping movable block and the second clamping movable block, the first clamping movable block is fixedly connected to the first cross bar (6), and the second clamping movable block is fixedly connected to the second cross bar (7).
8. A vehicle headlight positioning system according to claim 1 or 2, characterized in that: The vehicle lamp auxiliary positioning device (2) is also provided with a calibrator for vertically calibrating the vertical support column (5).