自混合型半导体激光多普勒测速仪对血流量的测量  

BLOOD FLOW MEASUREMENT BY SELF-MIXING SEMICONDUCTOR LASER DOPPLER VELOCIMETER

作　　者：吴利民[1] 尤海航[1] 

机构地区：[1]南京理工大学,南京210094

出　　处：《红外与激光工程》1997年第5期59-61,共3页Infrared and Laser Engineering

摘　　要：利用内藏光电探测器的自混合型的激光多普勒测速仪第一次成功地对血流量进行了测量。尽管血液具有低反射率及多方向发散的特点，但还是得到了明显的差拍信号及和血流速度成比例的基本频率信号。首先对带有广告色的水流进行了测量，通过观察由于流体方向的改变而引起的锯齿波差频波形的变化，确定了流体的运动方向。自混合型的半导体激光多普勒测速仅提供了一个简单、便利的测量血流速的方法。For the first time, the velocity of blood flow is measured successfully by using semiconductor laser Doppler velocimeter with photodiode detector. Although blood has the characteristics of low reflection and multi-scattering, clear Doppler signals whose frequency is proportional to the blood flow speed are obtained. It is thought that the velocimeter can offer a simple and compact method to measure the speed of blood flow.

关 键 词：自混合型 半导体激光器 多普勒测速仪 血流量 

分 类 号：TH776[机械工程—仪器科学与技术] TH815[机械工程—精密仪器及机械]