Low-frequency vibration measurement with a backscatter-modulated laser diode

1999 ◽  
Author(s):  
Jing Zhang ◽  
Qingming Luo ◽  
Shaoqun Zeng ◽  
Hui Gong ◽  
Weiguo Chen
Keyword(s):  
Laser Diode ◽  
Low Frequency ◽  
Vibration Measurement ◽  
Low Frequency Vibration

Low-Frequency Vibration Measurement Based on Spatiotemporal Analysis of Shadow Moiré

2011 ◽  
Vol 31 (4) ◽  
pp. 0412005
Author(s):  
史红健 Shi Hongjian ◽  
朱飞鹏 Zhu Feipeng ◽  
何小元 He Xiaoyuan
Keyword(s):  
Low Frequency ◽  
Spatiotemporal Analysis ◽  
Vibration Measurement ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
Low Frequency Vibration

scholarly journals Low-frequency vibration measurement by a dual-frequency DBR fiber laser

2017 ◽  
Vol 7 (3) ◽  
pp. 206-210 ◽  
Author(s):  
Bing Zhang ◽  
Linghao Cheng ◽  
Yizhi Liang ◽  
Long Jin ◽  
Tuan Guo ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Low Frequency ◽  
Vibration Measurement ◽  
Dual Frequency ◽  
Low Frequency Vibration

scholarly journals Development of a High-Sensitivity Optical Accelerometer for Low-Frequency Vibration Measurement

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2910 ◽  
Author(s):  
Rui-Jun Li ◽  
Ying-Jun Lei ◽  
Zhen-Xin Chang ◽  
Lian-Sheng Zhang ◽  
Kuang-Chao Fan
Keyword(s):  
Passive Control ◽  
Low Cost ◽  
Low Frequency ◽  
High Sensitivity ◽  
Dynamic Responses ◽  
Vibration Measurement ◽  
Leaf Spring ◽  
Seismic Mass ◽  
Low Frequency Vibration ◽  
Low Amplitude

Low-frequency vibration is a harmful factor that affects the accuracy of micro/nano-measuring machines. Low-frequency vibration cannot be completely eliminated by passive control methods, such as the use of air-floating platforms. Therefore, low-frequency vibrations must be measured before being actively suppressed. In this study, the design of a low-cost high-sensitivity optical accelerometer is proposed. This optical accelerometer mainly comprises three components: a seismic mass, a leaf spring, and a sensing component based on a four-quadrant photodetector (QPD). When a vibration is detected, the seismic mass moves up and down due to the effect of inertia, and the leaf spring exhibits a corresponding elastic deformation, which is amplified by using an optical lever and measured by the QPD. Then, the acceleration can be calculated. The resonant frequencies and elastic coefficients of various seismic structures are simulated to attain the optimal detection of low-frequency, low-amplitude vibration. The accelerometer is calibrated using a homemade vibration calibration system, and the calibration experimental results demonstrate that the sensitivity of the optical accelerometer is 1.74 V (m·s−2)−1, the measurement range of the accelerometer is 0.003–7.29 m·s−2, and the operating frequencies range of 0.4–12 Hz. The standard deviation from ten measurements is under 7.9 × 10−4 m·s−2. The efficacy of the optical accelerometer in measuring low-frequency, low-amplitude dynamic responses is verified.

Fiber Bragg Grating Accelerometer Based on L-Shaped Rigid Beam and Elastic Diaphragm for Low-Frequency Vibration Measurement

2015 ◽  
Vol 35 (12) ◽  
pp. 1206005 ◽  
Author(s):  
曾宇杰 Zeng Yujie ◽  
王俊 Wang Jun ◽  
杨华勇 Yang Huayong ◽  
马丽娜 Ma Lina
Keyword(s):  
Fiber Bragg Grating ◽  
Low Frequency ◽  
Vibration Measurement ◽  
Bragg Grating ◽  
Low Frequency Vibration

Low-frequency vibration measurement based on camera-projector system

2017 ◽  
Vol 28 (9) ◽  
pp. 095201 ◽  
Author(s):  
Chengang Lyu ◽  
Yuxiang Liu ◽  
Shuang Gao ◽  
Zhiqiang Bao ◽  
Yuqing Chang ◽  
...  
Keyword(s):  
Low Frequency ◽  
Vibration Measurement ◽  
Low Frequency Vibration
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