適路性機車後視鏡系統之設計與控制

The Design and Control of an Adaptive Rear-View Mirror System for Motorcycles

台灣地區地狹人稠，機車已成為我們日常生活中不可或缺的交通工具，機車在行駛時除了雙眼可看見的前方視野，傳統機車均以固定式後視鏡來提供駕駛者後方視野，但是當機車行駛於彎道或路面變化時，容易造成機車於行進間可能會瞬間產生視野死角，無法提供駕駛者後方視野的路況資訊，雖然在這個空窗期並不長，但是某些緊急狀況下卻可能造成交通事故。有鑑於此，本論文發展出一套具適路性之智慧型機車後視鏡系統，並透過各式感測器來偵測路況及機車姿態之變化作為系統之輸入訊號，再運用灰色預測 （grey prediction） 預先估算後視鏡應調整角度，並藉由控制器來控制後視鏡馬達，使機車後視鏡可隨機車俯仰 （pitch）、轉向 （steer）、側傾 （roll） 之不同動態與不同道路環境而改變其角度，改善傳統後視鏡視野死角的缺點，以提供機車駕駛者更寬廣的後視鏡視野，亦能提升駕駛者安全，減少交通事故的發生。

In Taiwan, the motorcycle has played an important role in our dailytransportation. The headlights and rear-view mirrors in a motorcycle actas eyes to provide front and rear views for the rider. Since the motorcycle’smirrors are fixed, if a motorcycle makes turns or runs on various roadsurfaces, it is easy to have an instant blind area for a rider, thus causing atraffic accident sometimes.In this paper, an adaptive rear-view mirror system for motorcycles hasbeen developed. According to the input signals from sensors, this systemadaptively adjusts the motorcycle rear-view mirror to follow the changes ofvehicle dynamics in pitch, steering and roll angles under different road conditions. A grey predictor was also developed in this paper to estimatethe changes in vehicle dynamics in advance. This system will improve onthe shortcomings of the conventional rear-view mirror, and provide wideand appropriate rear views for the motorcycle riders. It can also enhancethe riders’ safety and reduce the occurrence of traffic accidents.