Three-degree-of-freedom micro-vibration measurement system based on dual-frequency laser interference

2019 ◽  
Vol 27 (7) ◽  
pp. 1435-1443
Author(s):  
陈家键 CHEN Jia-jian ◽  
胡慧珠 HU Hui-zhu ◽  
缪立军 MIAO Li-jun ◽  
周一览 ZHOU Yi-lan ◽  
舒晓武 SHU Xiao-wu
Keyword(s):  
Measurement System ◽  
Degree Of Freedom ◽  
Vibration Measurement ◽  
Dual Frequency ◽  
Laser Interference ◽  
Frequency Laser ◽  
Micro Vibration ◽  
Three Degree Of Freedom

Study on Doppler Velocity Measurement System

2012 ◽  
Vol 562-564 ◽  
pp. 1240-1243
Author(s):  
Jian Chao Li ◽  
Jun Hong Su ◽  
Ming Gao
Keyword(s):  
Measurement System ◽  
Velocity Measurement ◽  
High Speed ◽  
Processing System ◽  
Measurement Range ◽  
High Accuracy ◽  
Laser Doppler ◽  
Doppler Velocity ◽  
Dual Frequency ◽  
Frequency Laser

In order to satisfy the high accuracy velocity measurement requirement, using the improved dual-frequency laser Doppler velocity measurement principle, designed a set of laser Doppler velocity measurement system. System consists of two parts: optical system and signal acquisition and processing system. Through the establishment of dual-frequency laser Doppler velocity measurement experimental platform for testing, the result shows that the method can be carried on the high accuracy velocity measurement which in high speed move object. Measurement range from 0.1 m/s to 50 m/s, the error is less than 2 percent and it could increase the speed measurement range.

Environment Compensation Technologies in Dual-Frequency Laser Interferometer Measurement System

2014 ◽  
Vol 41 (4) ◽  
pp. 0408004
Author(s):  
池峰 Chi Feng ◽  
朱煜 Zhu Yu ◽  
张志平 Zhang Zhiping ◽  
高为宫 Gao Weigong
Keyword(s):  
Measurement System ◽  
Laser Interferometer ◽  
Dual Frequency ◽  
Frequency Laser

A Measuring Method of Track Irregularity for High-Speed Railway Based on Dual-Frequency Laser Interference Technique

2013 ◽  
Vol 552 ◽  
pp. 446-451
Author(s):  
Wen Jun He ◽  
Yue Gang Fu ◽  
Yang Zheng ◽  
Lei Zhang ◽  
Jia Ke Wang ◽  
...  
Keyword(s):  
High Speed ◽  
Reference Method ◽  
Measuring Method ◽  
Dual Frequency ◽  
Laser Interference ◽  
High Speed Railway ◽  
Laser Alignment ◽  
Track Irregularity ◽  
Frequency Laser ◽  
Ray Path

A new measuring method of track irregularity for high-speed railway is proposed by using dual-frequency laser interference technique. The linear deviation between the phase-locked gauging head and the center line of the railway route can be calculated by comparing the phase difference variation of the laser beat signal in the test ray path and the reference ray path when the portable track inspection car is moving forward along the track. While we use laser ranging technique to measure gauge, after processing data, the static irregularity of track will be acquired by changing straightness deviation of phase-locked gauging head into straightness deviation of left-right two tracks. The method is different from the existing techniques for detecting high-speed railway irregularity, such as the inertial reference method, the measuring method of chord and the method of laser alignment; it utilized the accuracy of the time to accomplish the high-precision measurement of the space and achieved innovation in theory.

scholarly journals A Monocular Vision Measurement System of Three-Degree-of-Freedom Air-Bearing Test-Bed Based on FCCSP

2018 ◽  
Vol 8 (2) ◽  
pp. 119-126
Author(s):  
Zhanyu Gao ◽  
Yingying Gu ◽  
Yaoyu Lv ◽  
Zhenbang Xu ◽  
Qingwen Wu
Keyword(s):  
Measurement System ◽  
Monocular Vision ◽  
Degree Of Freedom ◽  
Air Bearing ◽  
Test Bed ◽  
Vision Measurement ◽  
Three Degree Of Freedom
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