一、前言对于利用激光多普勒效应,在激光照射用测头或散射光拾波用测头上使用光纤的速度计,称为光纤激光多普勒速度计(简称为LDV)。光纤 LDV 除了具有非接触计测、远距离测定、高精度和速度测定范围广等特征以外,作为光纤传感器的典型实例,还有绝缘性、无诱导特性、本征安全防爆性、可挠性、轻量和 I. Preface For the use of laser Doppler effect, the probe used in laser irradiation or scattered light pickup with a probe on the optical fiber speedometer, called the fiber laser Doppler speedometer (referred to as LDV). In addition to the features of non-contact measurement, long distance measurement, high accuracy and wide range of speed measurement, the optical fiber LDV is a typical example of an optical fiber sensor that has insulating properties, no induction characteristics, intrinsically safe and explosion proof properties, flexibility, Lightweight