Abstract: In order to enhance the mobility of the visual impaired，a model of portable and intelligent travel aid system named AudioGuide is designed.It uses GPS receiver to get the user’s position，stores the environment information into the map information database，and provides safe and reliable path through optimal path analysis algorithm.In this system，sonification technology is realized through the control of sound parameters.The environment information transmission can also be realized by sonification，auditory icon or earicon.It is simple in structure，easy to carry and easy to use.

Key words: visual impaired, GPS guide, optimal path analyze, sonification

摘要： 为了解决视障者的出行问题，设计了一种便携式智能户外行走辅助系统模型：AudioGuide。系统利用GPS接收器获取用户的当前位置信息，利用地图信息数据库存储环境信息，并利用最佳路径分析算法为用户提供安全可靠的路径。AudioGuide系统通过控制乐音的参数来实现可听化，用可听化、听标或耳标来传递环境信息，具有结构简单、携带方便、易使用等特点。

关键词: 视障者, GPS导航, 最佳路径分析, 可听化