| 陈林松,曹跃云,郭文勇,张磊,刘树勇.基于数字式MEMS传感器的声阵列成像系统设计*[J].,2015,34(5):439-444 |
| 基于数字式MEMS传感器的声阵列成像系统设计* |
| Acoustic imaging system design base on digital MEMS acoustic sensor array |
| 投稿时间：2015-02-16 修订日期：2015-08-28 |
| 中文摘要: |
| 常规驻极体传声器阵列成像系统存在数据采集系统复杂、体积大的问题，因而阵列传感器数量一般不超过60个，成像质量较差。为此，本文以数字式MEMS声传感器基础设计了260个传感器的声阵列，数据采集系统由FPGA控制，并嵌入到前端阵列中，后端是在另一个FPGA控制下的1个DSP芯片和2个PC104模块组成的集成系统，其中高速DSP芯片完成阵列信号处理以实现声成像功能。该系统能够实现对普通车间环境下机械设备噪声、气体泄漏噪声的现场成像测试，形成动态声像图。测试表明，该系统抗干扰能力强、声像分辨率高、成像速度快，实用效果良好。 |
| 英文摘要: |
| The data acquisition system of traditional acoustic imaging system based on electret microphone is very complex with large size. So most of the arrays’ acoustic sensors is limit in 60 and the image quality is poor. To solve this problem, an acoustic array with 260 MEMS microphones is developed. A compact data acquisition system is embedded in the array and controlled by a piece of FPGA. The terminal is a combination system made up of 1 piece of DSP and 2 pieces of PC104 which are organized by a piece of FPGA. The high speed DSP is in charge of array signal processing for imaging function. This system can apply on the spot measuring for machinery noise and gas-leakage noise in normal workshop and get dynamic images. Field tests and system operation proved its practicality and effectiveness. The system has better adaptability with strong anti-interference capacity, high resolution image, and high processing speed. |
| DOI： |
| 中文关键词: 声成像 MEMS声传感器 FPGA DSP 波束形成 |
| 英文关键词: acoustic imaging MEMS microphone FPGA DSP beamforimg |
| 基金项目:国家自然科学基金(No.51179197) |
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