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原文传递 Study of Driver Performance/Acceptance Using Aspheric Mirrors in Light Vehicle Applications.

题名：	Study of Driver Performance/Acceptance Using Aspheric Mirrors in Light Vehicle Applications.
关键词：	Mirrors-; Driver-performance; *Rearview-mirrors.;Motor-vehicles; Convex-mirrors; Human-factors; Information-retrieval; Optical-systems; Mathematical-analysis; Plane-mirrors; Static-tests.
摘要：	This report is intended to provide an overview of available information on aspheric outside rearview mirrors along with comparisons to spherically convex and flat mirrors. The objective is to provide a reference that presents the potential advantages and disadvantages of aspherics when applied to light vehicles. The report is composed of five parts: information retrieval, optical and mathematical analyses, static experiments, dynamic on-road experiments, and project findings. The information retrieval part reviews information appearing in the research and patent literature, as well as information online and from various manufacturers. Outside rear-view mirrors have been the subject of investigation for decades, so there is much to cover. The analyses lay the foundation for the optical aspects of the various mirrors. Specific emphasis is placed on mirror field-of-view, image minification, reflectivity, surface material reflectance, parameter measurements, mirror profile equations, and looming effects. The analyses are intended to improve understanding of the physical phenomena associated with the various mirror types. The static experiment part documents six experiments that were carried out. These involved measurement of the physical parameters of exemplars, objective measurement of reflected illuminance as a function of angle (which provides experimentally derived information on angular coverage of mirrors), evaluation of blind areas on each side of the light vehicle, distance estimation of mirror images by drivers, and finally, rated discomfort glare by both younger and older drivers. The dynamic (on-road) testing part describes an experiment performed on the Virginia Smart Road in which 12 different mirrors (7 on the driver side and 5 on the passenger side) were studied in realistic passing, merging, and gap acceptance maneuvers. The results are presented graphically for all significant changes as a function of mirror type, age group, gender, and maneuver type. The results show that aspheric mirrors do not cause substantive detrimental performance effects, but drivers found the distortion, uneasiness, and discomfort to be somewhat worse than for competing mirrors. The final part (Part V) of this document summarizes the project findings and draws main conclusions regarding aspheric mirrors as well as other types. The reader is referred to Part V for an overview of the findings. Three recommendations are provided, which involve future directions. The final recommendation involves developing and testing alternative outside rearview concepts. Six suggestions for these alternatives are provided and described. In general, this document is intended to summarize all available knowledge regarding aspheric outside rearview mirrors and associated conventional alternatives.
报告类型：	科技报告