便携式吸声系数测量仪的设计  

Design of Protable Sound Absorption Coefficient Measuring Instrument

作　　者：郝永德[1] 卜剑锋[1] 吴兆春[1] 

机构地区：[1]华中科技大学,湖北武汉430074

出　　处：《仪表技术与传感器》2010年第10期21-23,共3页Instrument Technique and Sensor

摘　　要：根据双传声器法的基本原理,设计一种便携式吸声系数测量仪。该仪器以TMS320VC5402和AT89S52作为控制芯片,通过两路完全对称的信号调理电路同时采集模拟声压信号,经ADS7862转换后送给DSP.然后,DSP完成傅里叶时频变换FFT并计算出吸声系数。最后,交给单片机显示并与上位机通信。系统具有便携、精度高、现场实时测量等优点。Based on the principles of twomicrophone technique,a design of a portable absorption coefficient measuring instrument was proposed.This instrument,with TMS320VC5402 and AT89S52 as microchip,simultaneously acquired the sound pressure signal through two perfectly symmetrical signal conditioning circuit and then transmitted them to DSP after the ADS7862 conversation.Then,DSP completed FFT to calculate the sound absorption coefficient and finally gave them to the microcomputer displaying and communicating with PC,to achieve the advantages of the system portable,high precision,in situ real-time measurement and so on.

关 键 词：吸声系数 数字信号处理器 单片机 ADS7862 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]