基于汽车运行与道路线形各因素影响下眩目的分析及规律研究

发布时间：2018-04-30 12:50

本文选题：汽车会车 + 眩目　；参考：《重庆交通大学》2014年硕士论文

【摘要】：夜间行驶时,很多交通事故都是由于汽车前照灯给对方驾驶员造成眩目引起的。怎样防止眩目已成为汽车安全的一个重要问题。影响汽车前照灯眩目的因素有很多,人、车、路和环境都影响着前照灯眩目的程度。而目前的关于防眩目的控制策略上多采用控制单因素变量的方法,但是仅仅控制单因素对眩目程度的判断精度较低。本文综合考虑了汽车运行和道路线形多因素对眩目的影响,分析了各因素对眩目的影响规律。本文所分析的汽车运行和道路线形各因素对眩目的影响规律能够顺应以后汽车信息化发展的趋势,在会车的过程中交换彼此的物理信息,车载处理器根据全面的信息判断前照灯是否给对方驾驶员造成眩目,从而给出适当的灯光光型,给双方驾驶员提供良好的会车照明环境。本文分析的规律可以作为其判断是否眩目和控制自适应前照灯转角使其光形不致眩目的理论基础。在数据拟合方面,利用最小二乘法对等光强曲线的近似椭圆的长半轴和短半轴进行关系拟合,验证相关性系数达到了要求,选择一元一次函数作为基础建立起模型,并用三次样条插值曲线进行比对验证,最终确定拟合函数；对椭圆的短半轴和其代表的光强值进行关系拟合,对比DataFit软件和最小二乘法,最终选用DataFit软件拟合出其关系模型。在分析水平直线公路上行驶下各因素对眩目的影响时,控制其他因素不变,求出在会车过程中不同年龄下的眩目程度,做出曲线分析驾驶员年龄对眩目的影响规律,然后依次分析驾驶员相对视线高度、横向距离对眩目的影响规律,最后模拟一个实际的会车情况,分析会车过程中眩目程度的变化规律。在分析有横向坡度的转弯公路上行驶眩目的变化规律时,将有横向坡度的公路假设为锥形体的内壁,建立三维直角坐标系,确定两车的坐标,再建立平面直角坐标系,将坐标系中相会车辆的坐标转换到等光强曲线坐标系中。根据我国公路设计标准中的参数和实际驾驶员的状况模拟一个实际的会车情况,计算出会车过程中眩目程度的变化,做出曲线并分析具体的变化规律。
[Abstract]:At night, many traffic accidents are caused by headlights causing dizziness to the other driver. How to prevent glare has become an important problem of automobile safety. There are many factors that influence the dazzling of automobile headlights. People, cars, roads and environment all affect the degree of headlights dazzling. However, most of the current control strategies for anti-glare use the method of controlling single-factor variables, but the accuracy of judging the degree of glare by only controlling single-factor is low. In this paper, the influence of vehicle running and road alignment on dazzle is considered comprehensively, and the influence law of each factor on dazzle is analyzed. The influence law of vehicle running and road alignment factors on dazzle in this paper can conform to the development trend of automobile informatization in the future, and exchange physical information between each other in the process of meeting the vehicle. According to the comprehensive information, the vehicle processor determines whether the headlight causes dazzling to the other driver, thus gives the appropriate light type and provides a good lighting environment for the drivers of both sides. The law analyzed in this paper can be used as the theoretical basis for judging whether the headlamp is dazzling or not and for controlling the turning angle of the adaptive headlamp so that its light form will not be dazzling. In the aspect of data fitting, the relationship between the long half axis and short half axis of the approximate ellipse of the equivalent light intensity curve of the least square method is used to fit the relationship, and the correlation coefficient is verified to meet the requirements. The model is established on the basis of the univariate first order function. Finally, the fitting function is determined by comparing the cubic spline interpolation curve, and the relationship between the short half axis of the ellipse and the light intensity represented by the ellipse is fitted. Compared with the DataFit software and the least square method, the DataFit software is used to fit the relationship model. In the analysis of the influence of the factors under driving on the horizontal straight road on the dazzle, the other factors are not changed, the degree of dazzling at different ages in the process of meeting the vehicle is obtained, and the curve analysis is made to analyze the influence of the driver's age on the dazzle. Then the influence law of the driver's relative sight height and lateral distance on the dazzle is analyzed in turn. Finally, a real meeting situation is simulated, and the change rule of the dazzling degree in the course of the vehicle meeting is analyzed. In the analysis of the law of dazzling driving on the turning highway with transverse slope, the highway with transverse slope is assumed to be the inner wall of the conical body, the three-dimensional right-angle coordinate system is established, the coordinates of the two vehicles are determined, and the plane right-angle coordinate system is established. The coordinate of the vehicle in coordinate system is transformed into the coordinate system of equal intensity curve. According to the parameters in the highway design standard and the actual driver's condition, the paper simulates an actual meeting situation, calculates the change of the dazzling degree in the course of meeting the vehicle, makes the curve and analyzes the concrete changing law.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U491.25

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