In the world,there is numerous of blind,and the they have to use 60% sensory abilities to get information.The ultrasonic guided cane used by blind is a novel guiding device designed to help visually impaired users.It detects the environment information by ultrasonic sensors,sends the information to the blind,and helps them to know the environment.It has the great significance to design a kind of practical ultrasonic guided cane for blind to help their visually impaired ability.This excogitation is designed according to the advantages and disadvantages in the ultrasonic guided cane used by blind at home and abroad,it focuses on the hardware and software design.The system uses PIC12C671 as the microprocessor,devises the electrocircuit of the ultrasonic sensors,receiving and voice alarm,and makes a writing of software program,in order to assist the blind to walk safely.%世界上视觉障碍者数量众多,他们只能用60%的感觉来获取信息。超声波导盲杖是为视觉障碍者提供环境导引的辅助工具。它通过超声波传感器对周围环境进行探测,将探测的信息反馈给视觉障碍者,帮助他们视觉信息的缺失。因而设计一款实用的导盲杖来帮助视觉障碍者是十分重要的。本设计在分析了国内外现有导盲辅助工具特点的基础上,确定了超声波导盲杖的总体设计方案,重点阐述了系统的硬件设计和软件设计。系统采用PIC12C671作为主控制器,设计了超声波发射接收电路和语音报警电路,并进行了软件程序的编写,以达到辅助盲人安全行走的目的。
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