CN111595562A - Dynamic test system for illumination performance of vehicle headlamp - Google Patents

Abstract

The invention relates to the technical field of vehicle testing, and specifically discloses a dynamic testing system for the lighting performance of vehicle headlights, comprising: a motion information collection subsystem for collecting GPS time, vehicle position information and pitch angle; an illumination data collection subsystem The system is used to collect the illuminance data of the headlights of the vehicle at the preset illuminance data measurement point, as well as the GPS time; the data analysis subsystem is used to calculate the front end of the vehicle and the The interval distance between the coordinate origins, and the GPS time is recorded; it is also used to correct the illuminance data according to the pitch angle, interval distance and height difference data to obtain the corrected illuminance data; The corrected illuminance data is synchronized with the distance of the vehicle to generate a curve of illuminance varying with distance. By adopting the technical scheme of the present invention, the accuracy of the lighting performance test can be improved.

Description

A dynamic test system for vehicle headlight lighting performance

technical field

The invention relates to the technical field of vehicle testing, in particular to a dynamic testing system for vehicle headlight lighting performance.

Background technique

At present, more and more cars are taking into account the safety of occupants and pedestrians. Especially at night or in poor lighting conditions, it becomes more difficult to know the road conditions. risk. The headlights are the "eyes" of the car. A good headlight can improve the driving safety at night and make the driver more relaxed and comfortable to drive at night. For this reason, strict requirements are put forward for the lighting performance of the headlights of the vehicle.

However, the existing national standards only restrict the lighting requirements of headlights from the perspective of light distribution, which is a technical requirement at the level of vehicle lighting components. After the standard car lights are installed on the vehicle, the lighting effect will be deviated due to factors such as installation position and dimming accuracy. Especially in the actual use of the headlights, the vehicle is in motion. Due to the influence of the road surface, weather, and vehicle attitude, the dynamic performance and static illumination are quite different, which also leads to the existing light distribution standard cannot meet the actual vehicle. Test requirements for lighting performance.

Therefore, a vehicle-level dynamic test system that can improve the accuracy of lighting performance test is required.

SUMMARY OF THE INVENTION

The invention provides a dynamic testing system for the lighting performance of vehicle headlights, which can improve the accuracy of lighting performance testing.

In order to solve the above-mentioned technical problems, the application provides the following technical solutions:

A dynamic test system for vehicle headlight lighting performance, comprising:

The motion information collection subsystem is used to collect the coordinate information of the preset lane line in the test lane and the height difference data relative to the preset coordinate origin, and also used to collect GPS time, vehicle position information and pitch angle;

The illuminance data acquisition subsystem is used to collect the illuminance data of the headlights of the vehicle at the preset illuminance data measurement point, as well as the GPS time;

The data analysis subsystem is used to calculate the distance between the front end of the vehicle and the coordinate origin according to the preset coordinate origin and the position information of the vehicle, and record the GPS time; The difference data is corrected against the illuminance data to obtain the corrected illuminance data; it is also used to synchronize the corrected illuminance data with the distance of the vehicle based on the GPS time to generate a curve of the illuminance changing with the distance.

The principle and beneficial effects of the basic scheme are as follows:

This solution tests the lighting performance of vehicle headlights at the vehicle level, including the different effects of installation, aiming and dimming, etc. Compared with the light distribution verification at the component level, it is more in line with the actual use of headlights; and this solution It can directly test the lighting performance of the vehicle in the actual driving process, which is more objective and accurate than the static test.

In conclusion, this solution can test the lighting performance of vehicle headlamps more realistically, improve the accuracy of lighting performance test, effectively help enterprises to improve products, promote the development of vehicle lamp technology, and greatly improve the safety of vehicles at night.

Further, the motion information collection subsystem includes a GPS differential positioning module, a lane data collection module, a motion information collection module and a first GPS signal receiving module installed on the vehicle;

The GPS differential positioning module is used to receive GPS satellite signals, calculate the distance correction number from the base station to the satellite according to the preset precise coordinates of the base station, and send the distance correction number to the first GPS signal receiving module in real time;

The first GPS signal receiving module is used to receive the GPS satellite signal and the distance correction number sent by the reference station, obtain the GPS time based on the GPS satellite signal and correct the positioning result, obtain the position information of the vehicle and send it to the motion information collection module;

The lane data collection module is used to collect the coordinate information of the lane line in the test lane and the height difference data relative to the coordinate origin and send it to the motion information collection module;

The motion information collection module is also used to collect the pitch angle of the vehicle.

By correcting the positioning result, the positioning accuracy of the vehicle can be improved and subsequent measurements are facilitated.

Further, the illumination data acquisition subsystem includes an illumination measurement module, an illumination data acquisition module and a second GPS signal receiving module;

The illuminance measurement module is used to measure the illuminance data of the vehicle headlights on the preset illuminance data measurement point and send it to the illuminance data acquisition module;

The second GPS signal receiving module is used to receive the GPS time in the GPS satellite signal and send it to the illumination data acquisition module;

The illuminance data acquisition module is used to collect the illuminance data of the headlights of the vehicle at the preset illuminance data measurement point during the test, and obtain the GPS time from the second GPS signal receiving module.

The illuminance data acquisition module simultaneously collects illuminance data and GPS time information, so as to provide basic data for subsequent processing.

Further, the data analysis subsystem includes an illumination data correction module, a vehicle distance calculation module and a data synchronization processing module;

The vehicle distance calculation module is used to obtain the position information from the motion information collection module, and calculate the distance between the front end of the vehicle and the coordinate origin during the test process according to the preset coordinate origin and the position information of the vehicle;

The illuminance data correction module is used to obtain the pitch angle from the motion information acquisition module, the separation distance from the vehicle distance calculation module, and the height difference data from the lane line data acquisition module, and correct the illuminance data to obtain the corrected illuminance data. ;

The data synchronization processing module is used for synchronizing the corrected illuminance data with the distance of the vehicle based on GPS time to generate a curve of illuminance varying with distance.

Due to the influence of vehicle motion pitch angle changes and road surface unevenness, it may cause illumination data measurement errors, so it is necessary to eliminate these two errors to improve the measurement accuracy.

Further, the motion information collection module is also used to collect the driving track of the vehicle;

The data analysis subsystem also includes a validity judgment module, which is used to obtain the coordinate information of the lane line from the lane data collection module and obtain the driving track from the motion information collection module, and calculate the vehicle's driving track based on the coordinate information of the lane line and the driving track. Lateral deviation; verify whether the lateral deviation is within the preset offset range, and if it is within the preset offset range, generate test valid information; if it exceeds the preset offset range, generate test invalid information.

The lateral deviation of the vehicle will have an impact on the accuracy of the measurement. Through the preset deviation range, the test invalid information is generated; the data collected when the lateral deviation is too large can be avoided.

Further, the validity determination module is also used to obtain driving information; the driving information includes human driving or robot driving; if it is human driving, the validity determination module is also used to set the preset offset range to ±30cm; if it is a robot Driving, the validity judgment module is also used to set the preset offset range to ±10cm.

Since it is difficult for humans to achieve the same manipulation accuracy as robots, setting different preset offset ranges is more in line with the actual situation.

Further, the illuminance data measurement points include a visibility reference measurement point and 2 actual visibility measurement points; the visibility reference measurement point is located on the boundary line of the lane; the connecting line of the 2 actual visibility measurement points passes through the visibility reference measurement point and is perpendicular to the ground. .

Setting 2 actual measurement points of visibility can facilitate calibration and improve measurement accuracy.

Further, the illumination data measurement points include a glare reference measurement point and two actual glare measurement points; the horizontal distance between the glare reference measurement point and the lane line is 3.2-3.5cm; the line connecting the two actual glare measurement points passes through the glare reference measurement point. and perpendicular to the bottom.

Setting 2 actual glare measurement points can facilitate calibration and improve measurement accuracy.

Further, when the illuminance data correction module corrects the illuminance data;

The illuminance data correction formula based on the visibility reference measurement point is as follows:

In the formula, E _c is the corrected illuminance data, h _t is the height of the visibility reference measurement point; θ is the pitch angle, h is the height difference between the position of the lane line and the coordinate origin, d is the separation distance, h ₁ and h ₂ is the height of the connecting line of the two actual visibility measurement points perpendicular to the ground; E ₁ and E ₂ are the illuminance data of the vehicle headlights on the two actual visibility measurement points.

Through the above formula, the illuminance error caused by the uneven road surface and the pitch attitude of the vehicle motion can be eliminated, and the accuracy of the illuminance data can be improved.

Further, when the illuminance data correction module corrects the illuminance data;

The illuminance data correction formula based on the glare reference measurement point is as follows:

In the formula, E _c is the corrected illuminance data, h _t is the height of the glare reference measurement point; θ is the pitch angle, h is the height difference between the position of the lane line and the coordinate origin, d is the separation distance, h ₃ and h ₄ is the height of the connecting line of the two actual glare measurement points perpendicular to the ground; E ₃ and E ₄ are the illuminance data of the vehicle headlights on the two actual glare measurement points.

Through the above formula, the illuminance error caused by the uneven road surface and the pitch attitude of the vehicle motion can be eliminated, and the accuracy of the illuminance data can be improved.

Description of drawings

FIG. 1 is a logic block diagram of a dynamic test system for the lighting performance of a vehicle headlight according to Embodiment 1;

2 is a flow chart of a dynamic testing method for the lighting performance of a vehicle headlight according to Embodiment 1;

3 is a schematic diagram of a lane of a dynamic testing method for the lighting performance of a vehicle headlight according to Embodiment 1;

4 is a schematic diagram of illumination data measurement points of a dynamic test method for vehicle headlight lighting performance according to Embodiment 1;

5 is a schematic diagram of a lane of a dynamic testing method for the lighting performance of a vehicle headlight according to Embodiment 2;

FIG. 6 is a schematic diagram of illuminance data measurement points of a dynamic testing method for the lighting performance of a vehicle headlight in Embodiment 2. FIG.

Detailed ways

The following is further described in detail by specific embodiments:

Example 1

As shown in FIG. 1 , a dynamic testing system for vehicle headlight lighting performance in this embodiment includes a motion information acquisition subsystem, an illumination data acquisition subsystem, and a data analysis subsystem.

The motion information collection subsystem includes a GPS differential positioning module, a lane data collection module, a motion information collection module and a first GPS signal receiving module installed on the vehicle,

The illumination data acquisition subsystem includes an illumination measurement module, an illumination data acquisition module and a second GPS signal receiving module.

The data analysis subsystem includes a validity determination module, an illumination data correction module, a vehicle distance calculation module and a data synchronization processing module.

The GPS differential positioning module is used to receive GPS satellite signals, calculate the distance correction number from the base station to the satellite according to the preset precise coordinates of the base station, and send the distance correction number to the first GPS signal receiving module in real time;

The first GPS signal receiving module is used to receive the GPS satellite signal and the distance correction number sent by the reference station, and correct the positioning result, and also obtain the GPS time based on the GPS satellite signal, obtain the position information of the vehicle and send it to the movement information collection module;

The lane data collection module is used to collect the coordinate information of the lane line in the test lane and the height difference data relative to the preset coordinate origin and send it to the motion information collection module;

The motion information collection module is also used to collect the speed, pitch angle and driving trajectory of the vehicle.

The illuminance measurement module is used to measure the illuminance data of the vehicle headlights on the illuminance data measurement point and send it to the illuminance data acquisition module;

The second GPS signal receiving module is used for receiving GPS satellite signals and sending them to the illumination data acquisition module. Specifically, for receiving GPS time in GPS signals;

The illuminance data acquisition module is used to collect the illuminance data of the vehicle headlights at the preset illuminance data measurement points during the test process, and obtain the GPS time from the second GPS signal receiving module.

The illuminance data measurement points include the visibility reference measurement point and two corresponding visibility actual measurement points; the visibility reference measurement point is located on the boundary line of the lane; the line connecting the two actual visibility measurement points passes through the visibility reference measurement point and is perpendicular to the ground. In this embodiment, the number of visibility reference measurement points is 2, and one visibility reference measurement point corresponds to 2 actual visibility measurement points. The two visibility reference measurement points are located on the two boundary lines of the lane, respectively.

It also includes the glare reference measurement point and 2 actual glare measurement points; the horizontal distance between the glare reference measurement point and the lane line is 3.2-3.5cm; the connecting line of the 2 glare actual measurement points passes through the glare reference measurement point and is perpendicular to the bottom surface.

The validity determination module is used to obtain the coordinate information of the lane line from the lane data collection module and obtain the driving track from the motion information collection module, judge the lateral deviation of the vehicle based on the coordinate information of the lane line and the driving track, and verify whether the lateral deviation is within the preset value. Within the offset range, if it is within the preset offset range, test valid information is generated; if it exceeds the preset offset range, test invalid information is generated.

In this embodiment, the validity determination module is also used to obtain driving information; the driving information includes human driving or robot driving; if it is human driving, the validity determination module is also used to set the preset offset range to ±30cm; Robot driving, the validity judgment module is also used to set the preset offset range to ±10cm.

The vehicle distance calculation module is used to obtain the position information from the motion information collection module, and calculate the distance between the front end of the vehicle and the coordinate origin during the test process according to the preset coordinate origin and the position information of the vehicle.

The illuminance data correction module is used to correct the illuminance data according to the pitch angle obtained from the motion information collection module, the separation distance obtained from the vehicle distance calculation module, and the height difference data obtained from the lane line data collection module, and to obtain the corrected illuminance data. Illuminance data. Due to the influence of the vehicle motion pitch angle change and the uneven road surface, it may cause the measurement error of the illuminance data, so it is necessary to eliminate these two errors to obtain the corrected illuminance data.

The illuminance data correction formula based on the visibility reference measurement point is as follows:

The illuminance data correction formula based on the glare reference measurement point is as follows:

In the formula, E _c is the corrected illuminance data, h _t is the height of the visibility reference measurement point or the glare reference measurement point, in the illumination data correction formula based on the visibility reference measurement point, the height is 25cm. The height in the illumination data correction formula is 110cm; θ is the pitch angle, h is the height difference between the position of the lane line and the coordinate origin, d is the distance between the front end of the vehicle and the coordinate origin, and h ₁ and h ₂ are 2 respectively. The height of the line connecting the actual measurement points of visibility is perpendicular to the ground; E ₁ and E ₂ are the illuminance data of the vehicle headlights on the two actual measurement points of visibility; h ₃ and h ₄ are the connection lines of the two actual measurement points of glare respectively The height perpendicular to the ground; E ₃ and E ₄ are the illuminance data of the vehicle headlights on the 2 actual glare measurement points. In other words, in this embodiment, the same illumination data correction formula is used for the data collected at the actual visibility measurement points corresponding to the two visibility reference measurement points. Corresponding corrected illuminance data can be obtained from the two visibility reference measurement points, that is, two sets of corrected illuminance data.

The data synchronization processing module is used for synchronizing the corrected illuminance data with the interval distance of the vehicle based on the GPS time, so as to generate a curve of the illuminance changing with the distance. That is, the lighting performance curve of the headlights of the vehicle is obtained. Specifically, a curve of visibility illuminance varying with distance and a curve of glare illuminance varying with distance can be obtained.

As shown in FIG. 2, based on a dynamic testing system for the lighting performance of vehicle headlights, the present embodiment also provides a dynamic testing method for vehicle headlight lighting performance, including the following steps:

S1. As shown in Figure 3, determine the test lane. In this embodiment, two adjacent straight lanes with a length of 200-250m and a width of 3.5-3.75m are used as the test lanes; A straight road with a length of 250m and a width of 3.5m is used as the test lane; the lane line is marked in the center of the lane where the vehicle is located, and the coordinate information of the lane line is recorded, and the point along the lane line with the first preset length from the vehicle is used as the end point of the vehicle. The end point of the travel is set as the coordinate origin, and the coordinate system of the test system is established; in this embodiment, the first preset length is 250m, and in other embodiments, the first preset length is determined by the length of the lane, for example, the length is 200m The first preset length is 200m. In this embodiment, the lane line refers to the dividing line at the center of the lane.

S2. Collect the height difference data of the position of the lane line relative to the coordinate origin at every second preset length along the direction of the lane where the vehicle is located through the lane data collection module as the h value, record the coordinate value of the position in the test system coordinate system, and save it is the lane line data; in other words, the lane line data includes the h value of the position and the x-axis coordinate value and the y-axis coordinate value in the test system coordinate system. The second preset length is 5-10m, and in this embodiment, it is specifically 5m.

S3. As shown in Figure 4, illuminance data measurement points are set on both sides of the coordinate origin; the illuminance data measurement points include a visibility reference measurement point and a glare reference measurement point.

In this embodiment, the visibility reference measurement points are 2, which are located on the boundary lines of the two lanes respectively, and the vertical height to the ground is 25cm; the horizontal distance between the glare reference measurement points and the lane line is 3.2-3.5cm, and the vertical height to the ground is 3.2-3.5cm. The height is 110cm; at the same time, the X-axis coordinates of the point projected on the ground by the visibility reference measurement point and the glare reference measurement point are both 0. In this embodiment, the boundary line refers to the outermost drawn line of the two lanes.

Two actual visibility measurement points are set at each visibility reference measurement point. The line connecting the two actual visibility measurement points passes through the visibility reference measurement point and is perpendicular to the ground, and the heights from the ground are h ₁ and h ₂ respectively.

Two actual glare measurement points are set at the glare reference measurement point. The line connecting the two actual glare measurement points passes through the glare reference measurement point and is perpendicular to the bottom surface, and the heights from the ground are h ₃ and h ₄ respectively. Wherein 10cm≦h ₁ , h ₂ ≦40cm, and h ₁ >h ₂ ; 90≦h ₃ , h ₄ ≦120cm, and h ₃ >h ₄ .

S4, make the vehicle drive at a constant speed along the lane line, and gradually approach the coordinate origin; collect the motion data of the vehicle through the motion information collection module, in this embodiment, the motion data includes the speed, the driving track, the pitch angle θ, and the time-varying data of the position information At the same time, the illuminance data collection module collects the illuminance data of the vehicle headlights changing with time at the illuminance data measurement point.

Among them, the data of the illuminance of the headlights of the upper vehicle on the actual measurement points h ₁ and h ₂ changing with time are recorded as E ₁ and E ₂ respectively. The time-varying data of the headlight illuminance _of the upper vehicle at the actual glare measurement points _h3 and _h4 are recorded as E3 and E4, respectively _. In this embodiment, the time adopts GPS time, and GPS time (that is, atomic time) is more accurate than UTC time (that is, universal time).

S5. Calculate the lateral deviation between the vehicle and the lane line (that is, the deviation in the direction of the Y-axis) based on the vehicle running track and the lane line coordinate information through the validity determination module, and verify whether it is within the preset deviation range and within the preset deviation range. If the offset range is set, the test is valid; if it exceeds the preset offset range, the test is invalid, and step S4 needs to be performed again; in this embodiment, driving information is also obtained, and based on the driving information, it is judged whether it is human driving or robot driving, For human driving, set the preset offset range to ±30cm; for robot driving, set the preset offset range to ±10cm.

S6. The vehicle distance calculation module calculates the separation distance d between the front end of the vehicle and the coordinate origin based on the position information of the vehicle, and obtains the data of the separation distance d changing with GPS time; the illumination data modification module uses the separation distance d and the pitch angle θ of the vehicle. And the h value of the lane line is corrected to the illuminance data to eliminate the illuminance error caused by the uneven road surface and the pitch angle of the vehicle movement, and obtain the illuminance data that changes with the GPS time after the correction.

The illuminance data correction formula based on the visibility reference measurement point is as follows:

The illuminance data correction formula based on the glare reference measurement point is as follows:

In the formula, E _c is the corrected illuminance data, h _t is the height of the visibility reference measurement point or the glare reference measurement point; in the illuminance data correction formula based on the visibility reference measurement point, it is 25cm, and in the illuminance based on the glare reference measurement point, it is 25cm. The data correction formula is 110cm.

If h ₁ coincides with h _t or h ₃ coincides with h _t , the above formula can be simplified to:

or

S7. The data synchronization processing module uses GPS time to synchronize the interval distance and the corrected illuminance data to obtain an illuminance data curve that changes with the distance, that is, to obtain a vehicle headlamp lighting performance curve. Specifically, a visibility illuminance curve that changes with distance and a glare illuminance curve that changes with distance are obtained.

Embodiment 2

The difference between this embodiment and the first embodiment is that when a dynamic test method for the lighting performance of vehicle headlights in this embodiment is applied to the curve test, in step S1, a strip with a length of 100-150m and a width of 3.5-3.75m is used. The single-lane curve is used as the test lane; in this embodiment, the length is 120m and the width is 3.5m;

In step S3, as shown in Figure 5, the visibility reference measurement point is located on the boundary line of the lane, and the vertical distance from the ground is 25cm; the horizontal distance between the glare reference measurement point and the lane line of the lane where the vehicle is located is 3.2-3.5cm, and the distance from the ground is 3.2-3.5cm. 110cm; at the same time, the X-axis coordinates of the points projected on the ground by the visibility reference measurement point and the glare reference measurement point are both 0. In this embodiment, the boundary line refers to the outermost drawing line of the single lane.

As shown in Figure 6, two actual visibility measurement points are set at each visibility reference measurement point. The line connecting the two actual visibility measurement points passes through the visibility reference measurement point and is perpendicular to the ground, and the heights from the ground are h1 and h2.

Two actual glare measurement points are set at the glare reference measurement point. The connecting line of the two actual glare measurement points passes through the glare reference measurement point and is perpendicular to the bottom surface, and the heights from the ground are h3 and h4 respectively. 10cm≤h1, h2≤40cm, and h1>h2; 90≤h3, h4≤120cm, and h3>h4.

Other test steps are the same as those in the first embodiment, and are not repeated here.

The above are only the embodiments of the present invention, and the invention is not limited to the field involved in this implementation case. The common knowledge such as the well-known specific structure and characteristics in the scheme has not been described too much here, and those of ordinary skill in the art know the filing date or priority. All the common technical knowledge in the technical field of the invention before the date, can know all the prior art in this field, and have the ability to apply the routine experimental means before the date, those of ordinary skill in the art can be given by the present application. Perfecting and implementing this solution in combination with one's own capabilities, some typical well-known structures or well-known methods should not become obstacles for those of ordinary skill in the art to implement the present application. It should be pointed out that for those skilled in the art, some modifications and improvements can be made without departing from the structure of the present invention. These should also be regarded as the protection scope of the present invention, and these will not affect the implementation of the present invention. Effectiveness and utility of patents. The scope of protection claimed in this application shall be based on the content of the claims, and the descriptions of the specific implementation manners in the description can be used to interpret the content of the claims.

Claims (10)

1. A dynamic test system for vehicle headlight lighting performance, characterized in that, comprising: The motion information collection subsystem is used to collect the coordinate information of the preset lane line in the test lane and the height difference data relative to the preset coordinate origin, and also used to collect GPS time, vehicle position information and pitch angle; The illuminance data acquisition subsystem is used to collect the illuminance data of the headlights of the vehicle at the preset illuminance data measurement point, as well as the GPS time; The data analysis subsystem is used to calculate the distance between the front end of the vehicle and the coordinate origin according to the preset coordinate origin and the position information of the vehicle, and record the GPS time; The difference data is corrected against the illuminance data to obtain the corrected illuminance data; it is also used to synchronize the corrected illuminance data with the distance of the vehicle based on the GPS time to generate a curve of the illuminance changing with the distance. 2 . The dynamic test system for vehicle headlight lighting performance according to claim 1 , wherein the motion information acquisition subsystem comprises a GPS differential positioning module, a lane data acquisition module, and motion information installed on the vehicle. 3 . an acquisition module and a first GPS signal receiving module; The GPS differential positioning module is used to receive GPS satellite signals, calculate the distance correction number from the base station to the satellite according to the preset precise coordinates of the base station, and send the distance correction number to the first GPS signal receiving module in real time; The first GPS signal receiving module is used to receive the GPS satellite signal and the distance correction number sent by the reference station, obtain the GPS time based on the GPS satellite signal and correct the positioning result, obtain the position information of the vehicle and send it to the motion information collection module; The lane data collection module is used to collect the coordinate information of the lane line in the test lane and the height difference data relative to the coordinate origin and send it to the motion information collection module; The motion information collection module is also used to collect the pitch angle of the vehicle. 3. The dynamic test system for vehicle headlight lighting performance according to claim 2, wherein the illuminance data acquisition subsystem comprises an illuminance measurement module, an illuminance data acquisition module and a second GPS signal receiving module; The illuminance measurement module is used to measure the illuminance data of the vehicle headlights on the preset illuminance data measurement point and send it to the illuminance data acquisition module; The second GPS signal receiving module is used to receive the GPS time in the GPS satellite signal and send it to the illumination data acquisition module; The illuminance data acquisition module is used to collect the illuminance data of the headlights of the vehicle at the preset illuminance data measurement point during the test, and obtain the GPS time from the second GPS signal receiving module. 4. The dynamic test system for vehicle headlight lighting performance according to claim 3, wherein the data analysis subsystem comprises an illumination data correction module, a vehicle distance calculation module and a data synchronization processing module; The vehicle distance calculation module is used to obtain the position information from the motion information collection module, and calculate the distance between the front end of the vehicle and the coordinate origin during the test process according to the preset coordinate origin and the position information of the vehicle; The illuminance data correction module is used to obtain the pitch angle from the motion information acquisition module, the separation distance from the vehicle distance calculation module, and the height difference data from the lane line data acquisition module, and correct the illuminance data to obtain the corrected illuminance data. ; The data synchronization processing module is used for synchronizing the corrected illuminance data with the distance of the vehicle based on GPS time to generate a curve of illuminance varying with distance. 5 . The dynamic testing system for vehicle headlight lighting performance according to claim 4 , wherein the motion information collection module is further used to collect the driving track of the vehicle; 6 . The data analysis subsystem also includes a validity judgment module, which is used to obtain the coordinate information of the lane line from the lane data collection module and obtain the driving track from the motion information collection module, and calculate the vehicle's driving track based on the coordinate information of the lane line and the driving track. Lateral deviation; verify whether the lateral deviation is within the preset offset range, and if it is within the preset offset range, generate test valid information; if it exceeds the preset offset range, generate test invalid information. 6 . The dynamic test system for vehicle headlight lighting performance according to claim 5 , wherein: the validity determination module is also used to obtain driving information; the driving information includes human driving or robot driving; if it is human driving , the effectiveness determination module is also used to set the preset offset range to ±30cm; if it is a robot driving, the effectiveness determination module is also used to set the preset offset range to ±10cm. 7 . The dynamic testing system for vehicle headlight lighting performance according to claim 6 , wherein the illumination data measurement points comprise a visibility reference measurement point and two actual visibility measurement points; the visibility reference measurement points are located at the On the boundary line; the line connecting the two actual visibility measurement points passes through the visibility reference measurement point and is perpendicular to the ground. 8 . The dynamic testing system for vehicle headlight lighting performance according to claim 6 , wherein the illuminance data measurement points include a glare reference measurement point and two actual glare measurement points; the glare reference measurement point and the lane line The horizontal distance is 3.2-3.5cm; the connecting line of the two actual glare measurement points passes through the glare reference measurement point and is perpendicular to the bottom surface. 9 . The dynamic testing system for vehicle headlight lighting performance according to claim 7 , wherein: when the illuminance data correction module corrects the illuminance data; 10 . The illuminance data correction formula based on the visibility reference measurement point is as follows:

In the formula, E _c is the corrected illuminance data, h _t is the height of the visibility reference measurement point; θ is the pitch angle, h is the height difference between the position of the lane line and the coordinate origin, d is the separation distance, h ₁ and h ₂ is the height of the connecting line of the two actual visibility measurement points perpendicular to the ground; E ₁ and E ₂ are the illuminance data of the vehicle headlights on the two actual visibility measurement points. 10 . The dynamic testing system for vehicle headlight lighting performance according to claim 8 , wherein: when the illuminance data correction module corrects the illuminance data; 10 . The illuminance data correction formula based on the glare reference measurement point is as follows:

In the formula, E _c is the corrected illuminance data, h _t is the height of the glare reference measurement point; θ is the pitch angle, h is the height difference between the position of the lane line and the coordinate origin, d is the separation distance, h ₃ and h ₄ is the height of the connecting line of the two actual glare measurement points perpendicular to the ground; E ₃ and E ₄ are the illuminance data of the vehicle headlights on the two actual glare measurement points.

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