基于激光反射法的音频声源定位系统设计

基于激光反射法的音频声源定位系统设计(开题报告,外文翻译,论文9000字)
摘 要
激光方向性好,亮度高,被应用于很多领域。针对激光在定位方面的应用,本文提出用光电检测技术设计的音频定位系统并在MXY8001光电综合实验平台上验证了其一定的可行性。系统设置于室内,两组激光光斑分别打在两块相同的振动材料上,由LCCD接收激光的反射光。振动材料响应音源的声波信号时会发生对应的振动,使得光斑发生微小位移。设计通过示波器采集实验平台输出的变化的电压信号,将数据导出并用MATLAB进行滤波分析,得到声波信号达到两振动材料的时间差。在理论分析的基础上,通过实验达到了一定效果。
关键词:激光;声源定位;线阵CCD;示波器:
Design of audio source location system based on laser reflection method
Abstract
Because of good directivity and high brightness, laser has been applied to many fields. In view of the application of laser in locating, this paper puts forward the audio positioning system designed by photoelectric detection technology and validates its feasibility on the MXY8001 photoelectric comprehensive experimental platform. The system is set indoors. Two lasers are beamed respectively to two sets of the same vibrating material, and the LCCD receives the reflected light. When the vibrating material responds to the acoustic signal of the sound source, the spot changes slightly. Using the oscilloscope to collect the changed voltage signals from the experimental platform, the data is derived and the MATLAB is used to analyze the time difference of the acoustic signal to reach the two vibration material. On the basis of theoretical analysis, the experiment has achieved certain results.
Key words: laser; sound source localization; linear array CCD; oscilloscope:
[资料来源:www.doc163.com]

目 录
摘要 I
ABSTRACT I
目录 II
第一章 绪 论 1
1.1声源定位技术概述、研究意义 1
1.2利用激光反射法的声源定位技术面临的问题和研究进展 2
1.3 激光反射法窃听定位的模型和原理 3
1.4 本论文完成的一些工作 4
第二章 实验准备 5
2.1声音定位系统设计 5
2.2表面振动测量方法的设计 7
2.3振动材料的准备 8
2.4信号采集和处理 8
第三章 实验过程 9
3.1实验平台的搭建 9
3.2实验仪器调整 10
3.3振动信号探测 12 [资料来源:Doc163.com]
第四章 数据分析 13
4.1实验过程中的误差: 13
4.2信号导入以及滤波分析 15
第五章 结语及展望 23
致谢 23
参考文献 24 [资料来源:https://www.doc163.com]
