题目：声音引导系统（B 题）摘要：本系统采纳两块 STC89C54RD+单片机作为控制声源移动和音频信号检测的核心，实现音频信号的产生和检测、发射和接受装置之间的无线通信、控制声源到达指定位置等功能。接收装置采集声源处发送的某一固定频率声波信号，经过滤波、放大和解码传送给单片机。单片机通过识别不同点接收信号的时间差发出相应指令，通过无线传输模式控制声源移动到指定位置。关键字：单片机 无线通信 声音引导 VOICE GUIDANCE SYSTEMAbstract:The system uses two STC89C54RD + microcontroller as a control centre for sound source movement and the audio signal detection of the core of the audio signal generation and detection, transmitting and receiving wireless communication between devices to control the sound source arrives at the appointed location and other functions. Receiver capture sound source waves at a fixed frequency sound to send signals, after filtering, amplification and decoding transmitted to the microcontroller. SCM received signal by identifying the different points of time difference given out accordingly, through the wireless transmission mode control sound source moves to the specified locationKeyword: MCU wireless communication voice guidance目录1 方案论证与比较……………………………………………………………3 1.1 音频信号采集与比较…………………………………………………3 1.2 误差信号传输方式…………………………………………………3 1.3 声源控制方式比较与选择……………………………………………32 单元电路设计………………………………………………………………3 2.1 总体设计………………………………………………………………3 2.2 单元电路设计与参数计算……………………………………………3 2.2.1 单片机最小系统………………………………………………4 2.2.2 音频接收器 MIC 电路…………………………………………42.2.3 音频信号放大电路……………………………………………42.2.4 音频解码电路…………………………………………………43 软件设计………………………………………………...
