基于MSP430F169单片机的声音定位系统  

Sound localization system based on MSP430F169

作　　者：罗丽[1] 马尚昌[1] 汤志亚[1] 黄敏[1] 秦锐敏 尤媛 郭佳[4] 

机构地区：[1]成都信息工程大学电子工程学院,成都610225 [2]成都金本华科技股份有限公司,成都610044 [3]国家气象中心,北京100081 [4]北京敏视达雷达有限公司,北京100081

出　　处：《微型机与应用》2016年第4期80-84,共5页Microcomputer & Its Applications

摘　　要：基于MSP430F169单片机研究设计了一个对声音信号进行识别、运算处理及坐标显示的声音定位系统。声源模块利用RC桥式正弦波振荡电路产生稳定的正弦波,通过OPA2227放大以及单片机控制三极管的通断,使纸盆喇叭产生音频信号,由LM358两级运算放大器以及LM567锁相环解码器构成的音频接收和声音处理电路对声音信号进行滤波放大并将模拟信号转换为频率稳定的数字信号。根据收到的声音信号的时间差,单片机进行运算处理,将声源坐标显示在LCD12864液晶显示器上。经测试,该系统能够在误差允许范围内判定声源所在的位置坐标,并进行处理和显示。The paper designs a sound positioning system based on the main control unit MCU MSP430f169. The system can identify and calculate the sound signal and display the coordinates of sound source. The stable sine wave generated by RC bridge type sine- wave generator electric circuit is amplified by OPA2227,controlling the transistor on-off to make paper cone speaker produce sound signal. Voice-frequency signal receiver and voice processing circuit consists of LM358 two-stage amplifier and LM567 PLL decoder,which can filter clutter and convert analog signal to stable frequency digital signal. According to the TDOA（ time difference of arrival） estimation method adopted in this paper,MCU will process and calculate the sound source and display the coordinates on the LCD12864. After the test,this system can determine and display the coordinates of sound source within acceptable error range.

关 键 词：声音定位 信号处理 MSP430F169 LM567 12864液晶显示 

分 类 号：TN702[电子电信—电路与系统]