stm32声源定位

本科毕业设计(论文)

基于STM32单片机声源方向识别器设计与实现

摘要

近年来，基于麦克风阵列的声源定位系统被广泛地应用于电话会议、视频会议、语音增强、助听器等系统中，因此受到了越来越多的关注，已经成为一大研究热点。在各种声源定位方法中，基于到达时延估计的双步定位法原理简单，运算量小，精度相对较高，有利于实时实现，因此它的应用也最为广泛，本文着重研究了该方法。

本文首先给出了麦克风阵列声源定位系统的硬件设计。该硬件电路实现了在一定的采样率下对多个麦克风通道进行同步采样。接下来，以STM32F103RBT6为硬件平台，设计了一个可以在二维平面内对声源进行实时定位的实验系统。STM32F103系列丰富的外设配置，使得STM32系列微型控制器适合于多种应用场合。系统软件部分的核心算法采用了基于达到时延估计双步定位。

最后，对系统进行大量测试，实验结果表明，该系统硬件性能良好，软件算法实现简单，运算量小，精度较高，可适用于实时定位系统中。

关键词　麦克风阵列；实验估计；声源定位；STM32F103RBT6

Abstract

In recent years, source localization system based on microphone array is being widely used in the videoconference, teleconference, speech enhancement, hearing aids. So it has been received a growing interest and become a very hot area. In various source location method, time difference of arrival (TDOA)based on the double step method is the most widely used, which has simple principle, low calculated amount, high precision, and can realize real-time in practice. The paper also focuses on this method.

Firstly, the hardware design of the source localization system based on microphone array is been presented. Multi-channel microphone signal can be sampled at a certain sampling frequency in the same time in this design. Secondly, based on the single chip Single-Chip microcomputer of STM32F103RBT6, standard and advanced communication interfaces. These features make the STM32F103 line microcontroller family suitable for a wide range of applications. The critical section of the system software is the double step sound source location method based on time difference of arrival (TDOA).

Finally, do a great amount of experiment test, the experiment all results show that the hardware performance of this is good, and the software localization algorithm has simple implementation, little computation and high accuracy, so it can be used in real time positioning system.

Keywords　Microphone array; sound source localization; Time delay estimation；STM32F103RBT6摘要II

第1章 绪论1

1.1 课题背景及研究的目的和意义1

1.2 国内外研究现