Development of archery sight-system by magnetic sensors for visualy impaired persons

本研究的目的是为视障人士开发射箭视觉系统。射箭瞄准系统的研制，有助于视障人士利用听觉信息，根据目标方向进行射箭运动。该系统基于地磁磁定向传感器。与目标的方位角和仰角由安装在弓上的传感器测量。感知到的信息被传送到位于弓箭手附近的接收器。接收器中的声音接口将感知到的信息转换为听觉信息，弓箭手通过无线耳机获得听觉信息。传感器系统重量很轻，只有34g，由两节SR44纽扣电池供电，工作时间约为2小时。戴着眼罩的弓箭手的射击实验表明，使用该系统的概率约为50%。视觉系统对视障人士玩射箭很有用。

The purpose of this study that the archery sight-system is developed for visually impaired persons. Development of an archery sight system is useful for the visually impaired person to play archery by target direction notificationwith hearing information. The system is based on magnetic directional sensors for earth magnetism. Both azimuth and elevation angles to the target are measured by the sensor equipped on the archery bow. The sensed information is transmitted to the receiver, which is located near the archer. The sound interface in the receiver transforms the sensed informatuon to the hearing information, and the archer gets this hearung information by the wireless headphones. The sesorsystem is light-weight of 34g, and operates for about 2 hours by two SR44 button batteries. Shooting experiments by archers with eye-mask show that the probability using the system was approximately 50 percent. The sight-system is useful for the visually impaired to play archery.