Hwang Alex D, Peli Eli
Schepens Eye Research Institute, Massachusetts Eye and Ear, and Department of Ophthalmology, Harvard Medical School, Boston, MA.
Transp Res Part C Emerg Technol. 2013 Jul 1;32:129-143. doi: 10.1016/j.trc.2012.09.003.
We describe the design and construction of a headlight glare simulator to be used with a driving simulator. The system combines a modified programmable off-the-shelf LED display board and a beamsplitter so that the LED lights, representing the headlights of oncoming cars, are superimposed over the driving simulator headlights image. Ideal spatial arrangement of optical components to avoid misalignments of the superimposed images is hard to achieve in practice and variations inevitably introduce some parallax. Furthermore, the driver's viewing position varies with driver's height and seating position preferences exacerbate such misalignment. We reduce the parallax errors using an intuitive calibration procedure (simple drag-and-drop alignment of nine LED positions with calibration dots on the screen). To simulate the dynamics of headlight brightness changes when two vehicles are approaching, LED intensity control algorithms based on both headlight and LED beam shapes were developed. The simulation errors were estimated and compared to real-world headlight brightness variability.
我们描述了一种与驾驶模拟器配合使用的前照灯眩光模拟器的设计与构建。该系统结合了一个经过改装的可编程现成LED显示屏和一个分束器，使得代表迎面驶来车辆前照灯的LED灯叠加在驾驶模拟器前照灯图像上。在实践中，很难实现光学组件的理想空间排列以避免叠加图像的错位，而变化不可避免地会引入一些视差。此外，驾驶员的观看位置会因驾驶员身高和座椅位置偏好而有所不同，这会加剧这种错位。我们使用一种直观的校准程序（通过简单的拖放操作将九个LED位置与屏幕上的校准点对齐）来减少视差误差。为了模拟两辆车接近时前照灯亮度变化的动态过程，开发了基于前照灯和LED光束形状的LED强度控制算法。对模拟误差进行了估计，并与实际前照灯亮度变化进行了比较。
