基于相关法的医用超声耦合剂实时测量系统

Ultrasonic conductivity-gel measurement system using correlation method

声速和衰减是医用耦合剂的关键参数,对超声仪器的临床诊断相当重要。相关方法是测量两个相近波形之间时差的重要方法,"波形不变性"原理是相关测速的基本工作原理。基于相关方法,利用虚拟示波器在PC上构建了一个实时医用超声耦合剂测量系统。该系统通过USB接口对虚拟示波器进行控制及数据传输,并利用Windows系统的多线程工具对软件进行了优化,实现了实时测量、计算和显示。对几种耦合剂样品进行了测试,并对结果作了处理和分析,从而实现了生产过程中超声耦合剂的声速和衰减的在线检测和控制。

Waveform invariance is the basic principle of correlation sonar.A real-time testing system ba-sed on correlation for ultrasonic conductivity-gel is presented.This system is based on virtual oscillos-cope.It controls communication of the virtual oscilloscope through a USB port and is optimized with the multithreading tool of Windows.Several samples are tested,and the results analyzed.This system can steadily measure the sound velocity and attenuation of the conductivity-gel.