一种光纤血流量传感器信号处理系统的设计  

Design of Signal Processing System for Fiber-Optic Blood Flow Sensor

作　　者：彭博[1] 史仪凯[1] 姚钦[1] 

机构地区：[1]西北工业大学机电学院,西安710072

出　　处：《传感技术学报》2007年第5期975-979,共5页Chinese Journal of Sensors and Actuators

基　　金：航空科学基金资助(04I53068);陕西省科技计划课题资助项目(2005K16G7(4))

摘　　要：在分析目前微循环血流量无创检测的基础上,设计了一种基于光纤的血流量传感器信号处理系统.利用激光多普勒技术,提取与血流量相关的频移信号.通过滤波、除法矫正和差动放大等电路对信号进行处理.重点介绍了系统的去噪原理.通过对人体指尖皮肤血流量的实际检测,结果表明,该传感器系统具有很高的信噪比,可以实现连续无创的微循环血流量检测,具有广泛的应用价值.Based on the current analysis of non-invasive detection for microvascular blood flow, a signal processing system for fiber-optic sensor was designed to extract frequency shift signal of blood flow by Laser Doppler technology. The signal was processed through filter, division correction and differential amplifier circuits. The system denoising principle was introduced with emphasis. Result of examination to fingertip skin blood flow indicates that this sensor system has high signal-to-noise ratio, which may realize continuous, non-invasive detection for microvascular blood flow and has the widespTead availability.

关 键 词：激光多普勒 血流量 前置放大 除法器 信噪比 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]