Principle, method and experiment of ultrasonic displacement measurement by using laser heterodyne interferometer

被引：0
|
作者：
Gong, Yuliang [1 ]
Li, Hongwei [1 ]
Bai, Shiwu [1 ]
Liu, Huimin [1 ]
机构：
[1] Beijing Univ of Science and, Technology, Beijing, China
来源：
Shengxue Xuebao/Acta Acustica | 1996年 / 21卷 / 03期
关键词：
Interferometers - Laser applications - Nondestructive examination;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
An introduction was made on the measurement principle, in which, a Bragg diffraction cell is used as the frequency shifter, and the PPL is used as the PM demodulator. Besides, the effect of space collimation on the signal-to-noise ratio, and the ways to lower the detection limit as well as to suppress the noise were also discussed.
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页码：259 / 264
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