基于MSP430和315Mhz无线传感通信的声音定位系统设计
本系统由两部分组成。声源模块是用单片机产生一个音频信号，该信号用三极管进行放大后输入到扬声器作为声源；接收模块使用麦克风进行接收，然后对接收的信号放大，通过无线传输模块发送与接收。声源定位原理是通过对四个传声器先后接收到的信号的时间差的处理，传送到上位机labview程序，通过一套比较完善的算法得到声音的坐标值。
设计完成后，进行了整体测试，基本能够达到设计要求20540
毕业论文关键词 声音定位，时间差(时延)，315KMz无线传输，MSP430
毕业设计说明书（论文）外文摘要
Title Sound positioning system based on MSP430 and 315Mhz wireless sensor communication
Abstract
From a military radar and satellite to the mobile robot ,GPS, mobile phone positioning in our daily life plays an increasingly important role. Sound localization, that determines sound source (test target) position in space, and its geological exploration, search and rescue personnel, target tracking, and so has a wide range of applications. Now sound positioning has been applying in video telephony, video conferencing systems.
The system consists of two parts. A sound source module generates an audio signal by the microcontroller, the signal is amplified by the transistor for input to the speaker as the sound source; microphone receiving module receiving a received signal is amplified and then transmitted through the wireless transmission and reception module. Sound source localization principle is time for the four microphone signals has received poor treatment, transfer to the PC labview program to get sound through a relatively sophisticated algorithms coordinates.
After the completion of the design, has carried on the overall test, basic can meet the requirements.
Keywords Sound localization, the time gap (delay),315KMz wireless transmission, MSP430
目 次
1 引言 1
1.1课题研究背景及意义 1
1.2国内外研究现状 2
1.3本课题研究目的 3
1.3.1声音定位系统的结构设计 3
1.3.2声音定位系统的声音接收模块设计和软件编程 3
1.3.3无线传输模块的设计和软件编程 3
1.3.4整合软件编程并把采集到的数据显示到上位机 3
1.3.5分析显示在上位机中的数据并通过算法定位 4
2定位的分类和原理 5
2.1定位系统简介 5
2.2声音定位系统原理 6
2.2.1仿人类双耳的声音定位原理 7
2.2.2基于到达时间差的定位原理 7
2.2.3基于声压幅度比的定位原理 12
2.3 本章小结 13
3.硬件设计 15
3.1声音信号的接收与放大电路的设计 15
3.1.1驻极体传声器简介 15
3.1.2 LM386芯片资料 16
3.1.3声音信号的接收与放大电路 18
3.2无线传输电路的设计 18
3.2.1 315M无线发射接受模块 18
3.2.2 MSP430单片机资料 19
3.2.3无线传感模块和MSP430单片机的连接电路 21
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