基于STM32的多路麦克风语音采集电路设计(任务书,开题报告,论文16000字)
摘要
近年来,随着我们时代的发展,我们对声音的采集和处理也应用于越来越多的领域,我们需要更有效的获取我们需要的信息,过滤掉不需要的信息，同时我们也需要更准确的处理好声音信号。本设计就是要做出一个能够实时录取声音信号和播放出来的系统。本设计主要利用STM32F103VET6作为主控芯片,利用两个麦克风模块来对声音进行采集,然后将采集到的声音通过ADC转换送到主控芯片,可以通过两个按键来选择进行几种不同的处理,将接收到的信号通过DAC输出到功率放大电路再送到扬声器进行输出,按键的同时液晶屏上会有相应的显示，也可以将信号送到上位机进行波形的显示和存储，还可以通过上位机的选择将录取的声音播放出来，这就是本设计主要的工作。最终我们实现了能够直接实时录取和播放一个麦克风采集到的信号，也能够播放两个麦克风录取到相减以后的声音信号，对于将录取的声音信号播放出来也没有做好，播放出来的声音只能够大致类似录取的声音，并不是非常清楚。
关键词：STM32 麦克风阵列 数模模数转换 液晶屏显示 LABVIEW软件
Design of multi channel microphone voice acquisition circuit based on STM32
abstract
In recent years, with the development of our times, we have also applied to more and more areas of sound acquisition and processing, we need more effective access to the information we need,Filter out the information that is not needed, but we also need to handle the sound signal more accurately.This design is to make a real-time admission of the sound signal and play out of the system.The design mainly uses STM32F103VET6 as the main control chip, the use of two microphone module to collect the sound, and then collected the sound through the ADC conversion to the main control chip,You can choose several different processing by two keys, the received signal through the DAC output to the power amplifier circuit and then sent to the speaker output, the button on the LCD screen will have the corresponding display,Can also send a signal to the host computer for the display and storage of the waveform, but also through the selection of the host computer will be admitted to play out, which is the main work of this design.Finally we can direct real-time recording and playback to a microphone to collect the signal and can also play two microphones admission after subtraction of voice signal.For the audio signal will be admitted to play out and do not do a good job, playing out the sound can only be roughly similar to the sound of admission, not very clear.
Key words: STM32;microphone array;analog digital conversion;LCD screen display;LABVIEW software
摘要 2
abstract 3
第一章 绪 论 1
1.1 课题研究的背景和意义 1
1.1.1 概述 1
1.1.2 语音信号采集系统的发展现状和特点 1
1.1.3 语音信号采集系统的发展前景分析 1
1.2 课题研究的主要内容 2
第二章 方案论证 3
2.1 主控芯片选择 4
2.2 语音采集模块选择 4
2.3 语音放大模块选择 6
2.3.1 功率放大器模块选择 6
2.3.2 扬声器选择 7
2.4 人机交互器件选择 8
2.4.1 液晶屏选择 8
2.4.2 按键选择 8
2.5方案论证小结 8
第三章 硬件设计 9
3.1 主控芯片电路设计 9
3.2语音采集模块电路设计 11
3.3 语音放大电路设计 12
3.4 人机交互电路设计 13
3.4.1液晶屏电路设计 13
3.4.2 按键电路设计 14
3.5 硬件设计小结 15
第四章 软件设计 16
4.1主程序算法流程分析 16
4.2 ADC模块程序设计 17
4.3 DAC模块程序设计 18
4.4人机交互程序设计 19
4.4.1液晶屏程序设计 19
4.4.2按键扫描程序设计 20
4.5 串口初始化函数 21
4.6 LABVIEW波形显示存储播放程序设计 22
4.7 软件设计小结 25
第五章 系统调试 26
5.1 程序生成和硬件焊接调试 26
5.2 软件程序与实物协调调试 28
总 结 30
参考文献 31
附录 33
致 谢 36
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