MEMS麦克风阵列处理系统设计+PCB电路图
摘要MEMS（Microelectromechanical Systems，微机电系统）麦克风体积小，耐热、耐振和防射频干扰性好，强大的耐热性允许其采用全自动SMT生产工艺，降低了生产成本。凭借其上述优势，MEMS麦克风已被广泛应用于智能手机、平板电脑和可穿戴设备等领域，市场增长强劲，潜力大。另外，MEMS麦克风一致性高，组成阵列后能够应用于噪声抑制、回声抵消、语音增强、实现指向性麦克风等。77155
本论文设计了一种基于MEMS麦克风的阵列处理系统，主要包括MEMS麦克风阵列模块和信号采集处理模块。信号采集处理模块以ARM处理器为核心，集成了信号调理、A/D转换、SRAM、eMMC（embedded MultiMediaCard，嵌入式多媒体卡）、USB接口、串口、以太网接口等模块，能够完成音频信号的拾取、滤波、放大、A/D转换、阵列处理、存储及传输等功能。以Altium Designer为工具，分模块完成了系统硬件部分的原理图和PCB设计。给出了系统主要软件功能模块的程序流程图。本文工作为未来开展基于MEMS麦克风阵列的研究和应用奠定了良好基础。
毕业论文关键词：MEMS麦克风 麦克风阵列 ARM Altium Designer PCB
毕业设计说明书外文摘要
Title Design of MEMS-based Microphone Array System
Abstract MEMS microphones have small volume。 Its resistance to heat,vibration and the radio frequency interference is good。 Due to the resistance to heat , MEMS microphones allow the adoption of fully automatic SMT production process, reducing the cost。 Because of its advantages ,MEMS microphones are widely used in smartphones, tablets and wearable devices。 So market growth of MEMS microphones is strong and potential。 The arrays of MEMS microphone with good consistency can eliminate noise,echo and improve the quality of voice and provide directional microphones, etc。
This paper has designed a MEMS-based microphone array system。 The system includes MEMS –based microphone array and the signal processing module。 The signal processing module with ARM processor as the core, has signal conditioning circuit, A/D conversion, SRAM, eMMC, USB interface, serial ports and Ethernet interface。 The system can pick up audio signal and have the function of filtering , amplifying, A/D conversion, storage,communicaton etc。 Altium Designer serves as the tool of the system hardware 。 I have pided the system into modules and completed the design of schematic and PCB design in the Altium Designer。 The paper also describes flow charts of typical modules。The work carried out in this paper lays foundation for future research and application of the MEMS-based microphone array。
Keywords MEMS Microphone Microphone Array ARM Altium Designer PCB
目 录
1 引言 1
1。1 研究背景与意义 1
1。3 论文主要工作与结构安排 2
2 系统需求分析与总体设计 3
2。1系统需求分析 3
2。2 MEMS麦克风 3
2。3 主控芯片选型 4
2。4 总体设计 5
3 系统硬件设计