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f目录
摘要IAbstractII1前言1
11设计的目的和意义112盲人避障技术的研究现状22设计所用的主要技术321硬件技术322软件技术33系统设计531总体框架532各个模块的工作流程533系统的软件流程图534系统各个模块的设计6
341超声波测距模块6342语音模块设计11343音频功放模块16344单片机最小系统及其简单应用194测试部分2441实验方法24411超声波测距的方法24412语音芯片的使用方法26413TDA2822的使用方法2742实验对象28421超声波测距模块r