基于定位导航的多传感器导盲系统设计

DESIGN OF MULTI-SENSOR BLIND GUIDANCE SYSTEM BASED ON GPS/BD NAVIGATION

针对盲人较难准确前往目的地的问题,设计一种适用于盲人群体的基于GPS/BD导航的多传感器导盲系统。导盲工作时,盲人用语音方式输入目的地信息,系统自动识别后传入导航模块,导航模块根据当前GPS/BD定位及目的地信息规划出步行路径,通过语音实时播报给盲人实现导盲。系统利用超声波测距模块对盲人行进路线前方2~400 cm,红外测距模块对两侧15~80 cm的障碍物进行探测,图像模块进行环境信息获取。经测试,系统能够准确规划合理的导航路径,传感器模块能够精准探测障碍并实时进行语音播报,在保证盲人安全的同时可以指导盲人准确前往目的地。

Aimed at the problem that the blind cannot go to the destination accurately,a multi-sensor blind guidance system is designed based on GPS/BD navigation for the blind.During the guide work,the blind needed to input the destination information by voice,which was automatically recognized by the system and passed into the navigation module.The walking path was planned by the navigation module according to the current GPS/BD positioning and destination information,which was broadcasted to the blind person in real time through voice to realize the guide.The system used ultrasonic module to detect obstacles about 2~400 cm in front of the blind person's route,the infrared module to detect obstacles about 15~80 cm on both sides in the traveling path,and the image module to acquire environmental information.The test shows that the system with reasonableness in navigation path planning,accuracy in obstacle detection,and real-time in voice broadcast.This system ensures the blind to avoid obstacles when walking along the navigation path and ensures the safety of guide blindness.