摘要
本文介绍一种利用“偏光分离检测信号差分技术”来消除基底噪声并用“锁相同步积分器”直接提取激光多普勒信号的“激光多普勒测长仪”。该仪器用于钢管探伤机上测量长度信息,相对测量精度可达±0.3％。
The paper introduces a Laser-Dopplar lengthmeter using'polarized light separated detected signal difference technique'to elimirate pedestal noise and'phase-lo-cked synch rocous integrating circuit'direct!y to extract Laser-Doppler signal.lt is used for measuring information of length on a defectscope, relative measurement precision is ± 0.3%.
出处
《激光杂志》
CAS
CSCD
北大核心
1991年第3期128-131,共4页
Laser Journal
