CN111595562A - Dynamic test system for illumination performance of vehicle headlamp - Google Patents
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Abstract
本发明涉及车辆测试技术领域,具体公开了一种车辆前大灯照明性能的动态测试系统,包括:运动信息采集子系统,用于采集GPS时间、车辆的位置信息和俯仰角;照度数据采集子系统,用于采集预设照度数据测量点上车辆前大灯的照度数据,以及GPS时间;数据分析子系统,用于根据预设的坐标原点以及车辆的位置信息,计算测试过程中车辆前端与坐标原点之间的间隔距离,并记录GPS时间;还用于根据俯仰角、间隔距离和高度差数据,对照度数据进行修正,得到修正后的照度数据;还用于以GPS时间为基准,将修正后的照度数据与车辆的间隔距离进行同步处理,生成照度随距离变化的曲线。采用本发明的技术方案能够提高照明性能测试的准确性。
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
技术领域technical field
本发明涉及车辆测试技术领域,特别涉及一种车辆前大灯照明性能的动态测试系统。The invention relates to the technical field of vehicle testing, in particular to a dynamic testing system for vehicle headlight lighting performance.
背景技术Background technique
当前汽车越来越多的考虑到保护乘员和行人的安全,尤其在夜间或光线不佳的情况下,路况获知变得更为困难,对驾驶员是一个考验,对于行人来说也存在一定的风险。而前大灯作为汽车的“眼睛”,好的前大灯可以提高夜间的行车安全,使驾驶者在夜间行驶更为轻松舒适,为此对车辆前大灯的照明性能提出了严格的要求。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.
而目前已有的国家标准仅从配光角度对前大灯照明要求进行约束,这是在车灯零部件级别的技术要求。符合标准的车灯安装到整车后,会由于安装位置、调光精度等因素造成照明效果的偏差。尤其是前大灯在实际使用过程中,车辆处于运动状态,由于路面、天气、车辆姿态的影响,动态性能与静态光照性差异性较大,这也导致了现有配光标准不能满足实车照明性能的测试要求。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.
为此需要一种能提高照明性能测试准确性的整车级的动态测试系统。Therefore, a vehicle-level dynamic test system that can improve the accuracy of lighting performance test is required.
发明内容SUMMARY OF THE INVENTION
本发明提供了一种车辆前大灯照明性能的动态测试系统,能够提高照明性能测试的准确性。The invention provides a dynamic testing system for the lighting performance of vehicle headlights, which can improve the accuracy of lighting performance testing.
为了解决上述技术问题,本申请提供如下技术方案:In order to solve the above-mentioned technical problems, the application provides the following technical solutions:
一种车辆前大灯照明性能的动态测试系统,包括:A dynamic test system for vehicle headlight lighting performance, comprising:
运动信息采集子系统,用于采集测试车道中预设车道线的坐标信息以及相对于预设的坐标原点的高度差数据,还用于采集GPS时间、车辆的位置信息和俯仰角;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;
照度数据采集子系统,用于采集预设照度数据测量点上车辆前大灯的照度数据,以及GPS时间;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;
数据分析子系统,用于根据预设的坐标原点以及车辆的位置信息,计算测试过程中车辆前端与坐标原点之间的间隔距离,并记录GPS时间;还用于根据俯仰角、间隔距离和高度差数据,对照度数据进行修正,得到修正后的照度数据;还用于以GPS时间为基准,将修正后的照度数据与车辆的间隔距离进行同步处理,生成照度随距离变化的曲线。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.
基础方案原理及有益效果如下:The principle and beneficial effects of the basic scheme are as follows:
本方案从整车级别测试车辆前大灯的照明性能,包含了安装、照准调光等的差异影响,相比零部件级的配光验证更加符合实际前照灯的使用情况;而且本方案能直接测试车辆在实际行驶过程中的照明性能,相比静态测试更加客观准确。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.
综上采用本方案能更加真实地对车辆前照灯照明性能进行测试,提高照明性能测试的准确性,可有效帮助企业改进产品,促进车灯技术发展,大大提高汽车夜间行驶安全性。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.
进一步,所述运动信息采集子系统包括GPS差分定位模块、车道数据采集模块,以及安装在车辆上的运动信息采集模块和第一GPS信号接收模块;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;
GPS差分定位模块用于接收GPS卫星信号,根据预设的基准站的精密坐标,计算基准站到卫星的距离修正数,并实时地将距离修正数发送至第一GPS信号接收模块;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;
第一GPS信号接收模块用于接收GPS卫星信号以及基准站发送的距离修正数,基于GPS卫星信号获取GPS时间并对其定位结果进行修正,得到车辆的位置信息并发送至运动信息采集模块;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;
车道数据采集模块用于采集测试车道中车道线的坐标信息以及相对于坐标原点的高度差数据并发送至运动信息采集模块;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;
运动信息采集模块还用于采集车辆的俯仰角。The motion information collection module is also used to collect the pitch angle of the vehicle.
通过对定位结果进行修正,能提高车辆的定位精度,便于后续的测量。By correcting the positioning result, the positioning accuracy of the vehicle can be improved and subsequent measurements are facilitated.
进一步,所述照度数据采集子系统包括照度测量模块、照度数据采集模块以及第二GPS信号接收模块;Further, the illumination data acquisition subsystem includes an illumination measurement module, an illumination data acquisition module and a second GPS signal receiving module;
照度测量模块用于测量预设的照度数据测量点上车辆前大灯的照度数据并发送至照度数据采集模块;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;
第二GPS信号接收模块用于接收GPS卫星信号中的GPS时间并发送至照度数据采集模块;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;
照度数据采集模块用于在试验过程中采集预设照度数据测量点上车辆前大灯的照度数据,以及从第二GPS信号接收模块获取GPS时间。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.
照度数据采集模块同时采集照度数据以及GPS时间信息,便于为后续处理提供基础数据。The illuminance data acquisition module simultaneously collects illuminance data and GPS time information, so as to provide basic data for subsequent processing.
进一步,所述数据分析子系统包括照度数据修正模块、车辆距离计算模块以及数据同步处理模块;Further, the data analysis subsystem includes an illumination data correction module, a vehicle distance calculation module and a data synchronization processing module;
车辆距离计算模块用于从运动信息采集模块获取位置信息,根据预设的坐标原点以及车辆的位置信息,计算测试过程中车辆前端与坐标原点之间的间隔距离;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;
照度数据修正模块用于根据从运动信息采集模块获取俯仰角,从车辆距离计算模块获取的间隔距离,以及从车道线数据采集模块获取高度差数据,对照度数据进行修正,得到修正后的照度数据;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. ;
数据同步处理模块用于以GPS时间为基准,将修正后的照度数据与车辆的间隔距离进行同步处理,生成照度随距离变化的曲线。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.
由于车辆运动俯仰角变化以及路面不平的影响,可能造成照度数据测量误差,因此需要对这两项误差进行消除,提高测量准确性。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.
进一步,所述运动信息采集模块还用于采集车辆的行驶轨迹;Further, the motion information collection module is also used to collect the driving track of the vehicle;
数据分析子系统还包括有效性判定模块,有效性判定模块用于从车道数据采集模块获取车道线的坐标信息以及从运动信息采集模块获取行驶轨迹,基于车道线的坐标信息与行驶轨迹计算车辆的横向偏差;验证横向偏差是否在预设偏移范围内,如果在预设偏移范围内则生成试验有效信息;若超过预设偏移范围,则生成试验无效信息。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.
车辆的横向偏差会对测量的准确性产生影响,通过在预设偏移范围,生成试验无效信息;可以避免横向偏差过大时采集的数据被采用。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.
进一步,所述效性判定模块还用于获取驾驶信息;驾驶信息包括人类驾驶或机器人驾驶;如果是人类驾驶,效性判定模块还用于将预设偏移范围设置为±30cm;如果是机器人驾驶,效性判定模块还用于将预设偏移范围设置为±10cm。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.
由于人类难以做到很机器人一样的操控精度,设置不同的预设偏移范围,更符合实际情况。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.
进一步,所述照度数据测量点包括能见度基准测量点和2个能见度实际测量点;能见度基准测量点位于车道的边界线上;2个能见度实际测量点的连线经过能见度基准测量点且垂直于地面。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. .
设置2个能见度实际测量点能便于进行校正,提高测量精度。Setting 2 actual measurement points of visibility can facilitate calibration and improve measurement accuracy.
进一步,所述照度数据测量点包括眩光基准测量点和2个眩光实际测量点;眩光基准测量点与车道线横向距离为3.2-3.5cm;2个眩光实际测量点的连线经过眩光基准测量点且垂直于底面。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.
设置2个眩光实际测量点能便于进行校正,提高测量精度。Setting 2 actual glare measurement points can facilitate calibration and improve measurement accuracy.
进一步,所述照度数据修正模块对照度数据进行修正时;Further, when the illuminance data correction module corrects the illuminance data;
基于能见度基准测量点的照度数据修正公式如下式所示:The illuminance data correction formula based on the visibility reference measurement point is as follows:
式中,Ec为修正后的照度数据,ht为能见度基准测量点的高度;θ为俯仰角,h为车道线所在位置相对于坐标原点的高度差,d为间隔距离,h1和h2分别为2个能见度实际测量点的连线垂直于地面的高度;E1和E2为2个能见度实际测量点上车辆前大灯的照度数据。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.
通过上述公式,可以消除路面不平以及车辆运动的俯仰姿态带来的照度误差,提高照度数据的准确性。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.
进一步,所述照度数据修正模块对照度数据进行修正时;Further, when the illuminance data correction module corrects the illuminance data;
基于眩光基准测量点的照度数据修正公式如下式所示:The illuminance data correction formula based on the glare reference measurement point is as follows:
式中,Ec为修正后的照度数据,ht为眩光基准测量点的高度;θ为俯仰角,h为车道线所在位置相对于坐标原点的高度差,d为间隔距离,h3和h4分别为2个眩光实际测量点的连线垂直于地面的高度;E3和E4为2个眩光实际测量点上车辆前大灯的照度数据。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.
通过上述公式,可以消除路面不平以及车辆运动的俯仰姿态带来的照度误差,提高照度数据的准确性。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.
附图说明Description of drawings
图1为实施例一一种车辆前大灯照明性能的动态测试系统逻辑框图;FIG. 1 is a logic block diagram of a dynamic test system for the lighting performance of a vehicle headlight according to
图2为实施例一一种车辆前大灯照明性能的动态测试方法的流程图;2 is a flow chart of a dynamic testing method for the lighting performance of a vehicle headlight according to
图3为实施例一一种车辆前大灯照明性能的动态测试方法的车道示意图;3 is a schematic diagram of a lane of a dynamic testing method for the lighting performance of a vehicle headlight according to
图4为实施例一一种车辆前大灯照明性能的动态测试方法照度数据测量点的示意图;4 is a schematic diagram of illumination data measurement points of a dynamic test method for vehicle headlight lighting performance according to
图5为实施例二一种车辆前大灯照明性能的动态测试方法的车道示意图;5 is a schematic diagram of a lane of a dynamic testing method for the lighting performance of a vehicle headlight according to
图6为实施例二一种车辆前大灯照明性能的动态测试方法照度数据测量点的示意图。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
具体实施方式Detailed ways
下面通过具体实施方式进一步详细说明:The following is further described in detail by specific embodiments:
实施例一Example 1
如图1所示,本实施例的一种车辆前大灯照明性能的动态测试系统,包括运动信息采集子系统、照度数据采集子系统以及数据分析子系统。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.
运动信息采集子系统包括GPS差分定位模块、车道数据采集模块,以及安装在车辆上的运动信息采集模块和第一GPS信号接收模块,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,
照度数据采集子系统包括照度测量模块、照度数据采集模块以及第二GPS信号接收模块。The illumination data acquisition subsystem includes an illumination measurement module, an illumination data acquisition module and a second GPS signal receiving module.
数据分析子系统包括有效性判定模块、照度数据修正模块、车辆距离计算模块以及数据同步处理模块。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.
GPS差分定位模块,用于接收GPS卫星信号,根据预设的基准站的精密坐标,计算基准站到卫星的距离修正数,并实时地将距离修正数发送至第一GPS信号接收模块;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;
第一GPS信号接收模块,用于接收GPS卫星信号以及基准站发送的距离修正数,并对其定位结果进行修正,还基于GPS卫星信号获取GPS时间,得到车辆的位置信息并发送至运动信息采集模块;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;
车道数据采集模块,用于采集测试车道中车道线的坐标信息以及相对于预设的坐标原点的高度差数据并发送至运动信息采集模块;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;
运动信息采集模块,还用于采集车辆的速度、俯仰角和行驶轨迹。The motion information collection module is also used to collect the speed, pitch angle and driving trajectory of the vehicle.
照度测量模块,用于测量照度数据测量点上车辆前大灯的照度数据并发送至照度数据采集模块;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;
第二GPS信号接收模块,用于接收GPS卫星信号并发送至照度数据采集模块。具体的,用于接收GPS信号中的GPS时间;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;
照度数据采集模块,用于在试验过程中采集预设照度数据测量点上车辆前大灯的照度数据,以及从第二GPS信号接收模块获取GPS时间。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.
照度数据测量点包括能见度基准测量点和2个对应的能见度实际测量点;能见度基准测量点位于车道的边界线上;2个能见度实际测量点的连线经过能见度基准测量点且垂直于地面。本实施例中,能见度基准测量点的数量为2个,1个能见度基准测量点对应2个能见度实际测量点。2个能见度基准测量点分别位于车道的两条边界线上。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.
还包括眩光基准测量点和2个眩光实际测量点;眩光基准测量点与车道线横向距离为3.2-3.5cm;2个眩光实际测量点的连线经过眩光基准测量点且垂直于底面。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.
有效性判定模块,用于从车道数据采集模块获取车道线的坐标信息以及从运动信息采集模块获取行驶轨迹,基于车道线的坐标信息与行驶轨迹判断车辆的横向偏差,验证横向偏差是否在预设偏移范围内,如果在预设偏移范围内则生成试验有效信息;若超过预设偏移范围,则生成试验无效信息。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.
本实施例中,效性判定模块还用于获取驾驶信息;驾驶信息包括人类驾驶或机器人驾驶;如果是人类驾驶,效性判定模块还用于将预设偏移范围设置为±30cm;如果是机器人驾驶,效性判定模块还用于将预设偏移范围设置为±10cm。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.
车辆距离计算模块,用于从运动信息采集模块获取位置信息,根据预设的坐标原点以及车辆的位置信息,计算测试过程中车辆前端与坐标原点之间的间隔距离。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.
照度数据修正模块,用于根据从运动信息采集模块获取的俯仰角,从车辆距离计算模块获取的间隔距离,以及从车道线数据采集模块获取高度差数据,对照度数据进行修正,得到修正后的照度数据。由于车辆运动俯仰角变化以及路面不平的影响,可能造成照度数据测量误差,因此需要对这两项误差进行消除,得到修正后的照度数据。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.
基于能见度基准测量点的照度数据修正公式如下式所示:The illuminance data correction formula based on the visibility reference measurement point is as follows:
基于眩光基准测量点的照度数据修正公式如下式所示:The illuminance data correction formula based on the glare reference measurement point is as follows:
式中,Ec为修正后的照度数据,ht为能见度基准测量点或眩光基准测量点的高度,在基于能见度基准测量点的照度数据修正公式中高度为25cm,在基于眩光基准测量点的照度数据修正公式中高度为110cm;θ为俯仰角,h为车道线所在位置相对于坐标原点的高度差,d为车辆前端与坐标原点之间的间隔距离,h1和h2分别为2个能见度实际测量点的连线垂直于地面的高度;E1和E2为2个能见度实际测量点上车辆前大灯的照度数据;h3和h4分别为2个眩光实际测量点的连线垂直于地面的高度;E3和E4为2个眩光实际测量点上车辆前大灯的照度数据。换句话说,本实施例中,2个能见度基准测量点对应的能见度实际测量点上采集的数据均采用同样的照度数据修正公式。2个能见度基准测量点能分别得到对应的修正后的照度数据,也就是两组修正后的照度数据。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.
数据同步处理模块,用于以GPS时间为基准,将修正后的照度数据与车辆的间隔距离进行同步处理,生成照度随距离变化的曲线。也即得到车辆前大灯照明性能曲线。具体的,可以得到能见度照度随距离变化的曲线以及眩光照度随距离变化的曲线。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.
如图2所示,基于一种车辆前大灯照明性能的动态测试系统,本实施例还提供一种车辆前大灯照明性能的动态测试方法,包括如下步骤: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、如图3所示,确定测试的车道,本实施例中以两条相邻且分别长200-250m,宽3.5-3.75m的直道作为测试的车道;本实施例中,具体以两条分别长250m、宽3.5m的直道作为测试的车道;在车辆所在车道的中心标记车道线,记录车道线坐标信息,沿车道线以距离车辆第一预设长度的点作为车辆行驶的终点,并将该行驶的终点设为坐标原点,建立测试系统坐标系;本实施例中,第一预设长度为250m,在其他实施例中,第一预设长度以车道的长度而定,例如长200m的车道,第一预设长度就为200m。本实施例中,车道线指车道中心位置的分割线。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、通过车道数据采集模块沿车辆所在车道方向每间隔第二预设长度采集车道线所在位置相对于坐标原点的高度差数据作为h值,记录该位置在测试系统坐标系中的坐标值,保存为车道线数据;换句话说,车道线数据包括该位置的h值以及在测试系统坐标系中x轴坐标值、y轴坐标值。第二预设长度为5-10m,本实施例中,具体为为5m。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、如图4所示,在坐标原点的两侧设置照度数据测量点;照度数据测量点包括能见度基准测量点和眩光基准测量点。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.
本实施例中,能见度基准测量点为2个,分别位于两条车道的边界线上,且与地面垂直高度为25cm;眩光基准测量点与车道线横向距离为3.2-3.5cm,且与地面垂直高度为110cm;同时能见度基准测量点、眩光基准测量点在地面投影的点X轴坐标均为0。本实施例中,边界线指两个车道最外侧的画线。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.
在每个能见度基准测量点处设置2个能见度实际测量点,2个能见度实际测量点的连线经过能见度基准测量点且垂直于地面,且距离地面的高度分别为h1和h2。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.
在眩光基准测量点处设置2个眩光实际测量点,2个眩光实际测量点的连线经过眩光基准测量点且垂直于底面,且距离地面的高度分别为h3和h4。其中10cm≤h1,h2≤40cm,且h1>h2;90≤h3,h4≤120cm,且h3>h4。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、使车辆沿车道线匀速行驶,逐渐靠近坐标原点;通过运动信息采集模块采集车辆的运动数据,本实施例中,运动数据包括速度、行驶轨迹、俯仰角θ以及位置信息随时间变化的数据;同时通过照度数据采集模块采集照度数据测量点上车辆前大灯照度随时间变化的数据。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.
其中,能见度实际测量点h1和h2上的上车辆前大灯照度随时间变化的数据分别记为E1和E2。眩光实际测量点h3和h4上的上车辆前大灯照度随时间变化的数据分别记为E3和E4。本实施例中,时间均采用GPS时间,GPS时间(也就是原子时)也UTC时间(也就是世界时)相比,精度更高。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、通过有效性判定模块基于车辆行驶轨迹与车道线坐标信息,计算车辆与车道线之间的横向偏差(也就是Y轴方向上的偏差),验证是否在预设偏移范围内,在预设偏移范围内则试验有效;若超过预设偏移范围,则本次测试无效,需重新进行S4步骤;本实施例中,还获取驾驶信息,基于驾驶信息判断是人类驾驶还是机器人驾驶,如果是人类驾驶,将预设偏移范围设置为±30cm;如果是机器人驾驶,将预设偏移范围设置为±10cm。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、车辆距离计算模块基于车辆的位置信息计算车辆前端与坐标原点之间的间隔距离d,得到间隔距离d随GPS时间变化的数据;照度数据修改模块利用该间隔距离d、车辆的俯仰角θ以及车道线的h值对照度数据进行修正,消除路面不平以及车辆运动的俯仰角带来的照度误差,得到修正后随GPS时间变化的照度数据。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.
基于能见度基准测量点的照度数据修正公式如下式所示:The illuminance data correction formula based on the visibility reference measurement point is as follows:
基于眩光基准测量点的照度数据修正公式如下式所示:The illuminance data correction formula based on the glare reference measurement point is as follows:
式中,Ec为修正后的照度数据,ht为能见度基准测量点或眩光基准测量点的高度;在基于能见度基准测量点的照度数据修正公式中为25cm,在基于眩光基准测量点的照度数据修正公式为110cm。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.
若h1与ht重合或h3与ht重合,则上述公式可简化为:If h 1 coincides with h t or h 3 coincides with h t , the above formula can be simplified to:
或or
S7、数据同步处理模块利用GPS时间对间隔距离和修正后的照度数据进行同步处理,得到随距离变化的照度数据曲线,也即得到车辆前照灯照明性能曲线。具体的,得到随距离变化的能见度照度曲线和得到随距离变化的眩光照度曲线。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.
实施例二
本实施例和实施例一的区别在于,本实施例中一种车辆前大灯照明性能的动态测试方法应用于弯道测试时,步骤S1中以一条长100-150m,宽3.5-3.75m的单车道的弯道作为测试的车道;本实施例中,具体为长120m、宽3.5m;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;
步骤S3中,如图5所示,能见度基准测量点位于车道的边界线上,且与地面垂直距离为25cm;眩光基准测量点与车辆所在车道的车道线横向距离为3.2-3.5cm,距离地面110cm;同时能见度基准测量点、眩光基准测量点在地面投影的点X轴坐标均为0。本实施例中,边界线指单车道最外侧的画线。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.
如图6所示,在每个能见度基准测量点处设置2个能见度实际测量点,2个能见度实际测量点的连线经过能见度基准测量点且垂直于地面,且距离地面的高度分别为h1和h2。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.
在眩光基准测量点处设置2个眩光实际测量点,2个眩光实际测量点的连线经过眩光基准测量点且垂直于底面,且距离地面的高度分别为h3和h4。其中10cm≤h1,h2≤40cm,且h1>h2;90≤h3,h4≤120cm,且h3>h4。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.
其他测试步骤以实施例一相同,这里不再赘述。Other test steps are the same as those in the first embodiment, and are not repeated here.
以上的仅是本发明的实施例,该发明不限于此实施案例涉及的领域,方案中公知的具体结构及特性等常识在此未作过多描述,所属领域普通技术人员知晓申请日或者优先权日之前发明所属技术领域所有的普通技术知识,能够获知该领域中所有的现有技术,并且具有应用该日期之前常规实验手段的能力,所属领域普通技术人员可以在本申请给出的启示下,结合自身能力完善并实施本方案,一些典型的公知结构或者公知方法不应当成为所属领域普通技术人员实施本申请的障碍。应当指出,对于本领域的技术人员来说,在不脱离本发明结构的前提下,还可以作出若干变形和改进,这些也应该视为本发明的保护范围,这些都不会影响本发明实施的效果和专利的实用性。本申请要求的保护范围应当以其权利要求的内容为准,说明书中的具体实施方式等记载可以用于解释权利要求的内容。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.
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