摘要
文章报道了一种测量液体粘滞系数的新方法———微机控制超声多普勒法 .它将超声技术与计算机技术相结合 ,利用超声多普勒效应接收液体中下落小球的频移信号 ,将此信号送微机进行采集、比较、判断、计算并显示出粘滞系数 .
A new method to measure the viscosity factor of liquids by the ultrasonic Doppler effect is reported. The method combines ultrasonic and microcomputer techniques. The frequency shifting signal of a dropping ball in the liquid is received via ultrasound. Under the control of the microcomputer the data are collected, processed and analysed, and the result is displayed on the screen. The viscosity factors of many kinds of liquids can be detected quickly and accurately by this method.
出处
《物理》
CAS
北大核心
2001年第4期220-222,共3页
Physics
关键词
粘滞系数
超声多普勒效应
频移信号
微机控制
viscosity factor, ultrasonic Doppler effect, frequency shifting signal, under the control of the microcomputer
