16通道声波飞行时间测量系统  

16 channel acoustic flight time measurement system

作　　者：颜华[1] 王金[1] 陈冠男[1] 

机构地区：[1]沈阳工业大学信息科学与工程学院,沈阳110870

出　　处：《沈阳工业大学学报》2010年第1期70-74,共5页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(60772054)

摘　　要：为了获得更多路径的声波飞行时间,提高声学法温度场重建精度,设计了基于虚拟仪器的16通道声波飞行时间测量系统.该系统以LabVIEW为软件设计平台,以数据采集模块、声波发射电路、声波接收电路和带声卡的计算机构成硬件系统,实现了声波信号的产生、发射、接收、采集和互相关分析全过程.测试结果表明,系统能够按照设计构想正常运行,用互相关分析法获得的各路径声波飞行时间估值稳定,在系统中嵌入适当的温度场重建算法便可实现16通道声学法温度场检测.In order to acquire more routes of acoustic flight time and improve the accuracy of temperature field reconstruction,a 16 channel acoustic flight time measurement system based on virtual instrument was designed. LabVIEW was used as the software design platform. The corresponding hardware system was composed of acoustic transmitting and receiving circuits,a data acquisition module and a personal computer with sound card. Whole process such as generating,transmitting and receiving of acoustic wave as well as acquiring and analyzing of data were realized automatically. The experimental results indicate that the system can work as the designed idea,and the estimation of flight time acquired by the cross-correlation analysis method is stable. The 16 channel acoustic measurement of temperature field can be realized by embedding the proper temperature reconstruction algorithm in the system.

关 键 词：飞行时间估计 互相关 数据采集 虚拟仪器 声层析成像 温度场检测 声波发射 声波接收 

分 类 号：TB52[理学—物理]