High Sensitivity Distributed Vibration Sensor Based on Polarization-Maintaining Configurations of Phase-OTDR

2011 ◽  
Vol 23 (15) ◽  
pp. 1091-1093 ◽  
Author(s):  
Zengguang Qin ◽  
Tao Zhu ◽  
Liang Chen ◽  
Xiaoyi Bao
Keyword(s):  
High Sensitivity ◽  
Vibration Sensor ◽  
Polarization Maintaining

scholarly journals Transparent and Flexible Vibration Sensor Based on a Wheel-Shaped Hybrid Thin Membrane

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1246
Author(s):  
Siyoung Lee ◽  
Eun Kwang Lee ◽  
Eunho Lee ◽  
Geun Yeol Bae
Keyword(s):  
Frequency Response ◽  
High Sensitivity ◽  
Vibration Sensor ◽  
Human Machine Interaction ◽  
High Transparency ◽  
Vibration Sensors ◽  
Low Stiffness ◽  
Machine Interaction ◽  
The Internet Of Things ◽  
Ultrathin Membranes

With the advent of human–machine interaction and the Internet of Things, wearable and flexible vibration sensors have been developed to detect human voices and surrounding vibrations transmitted to humans. However, previous wearable vibration sensors have limitations in the sensing performance, such as frequency response, linearity of sensitivity, and esthetics. In this study, a transparent and flexible vibration sensor was developed by incorporating organic/inorganic hybrid materials into ultrathin membranes. The sensor exhibited a linear and high sensitivity (20 mV/g) and a flat frequency response (80–3000 Hz), which are attributed to the wheel-shaped capacitive diaphragm structure fabricated by exploiting the high processability and low stiffness of the organic material SU-8 and the high conductivity of the inorganic material ITO. The sensor also has sufficient esthetics as a wearable device because of the high transparency of SU-8 and ITO. In addition, the temperature of the post-annealing process after ITO sputtering was optimized for the high transparency and conductivity. The fabricated sensor showed significant potential for use in transparent healthcare devices to monitor the vibrations transmitted from hand-held vibration tools and in a skin-attachable vocal sensor.

Optical vibration sensor based on Michelson interferometer arrangement with polarization-maintaining fibers

2014 ◽  
Author(s):  
Jakub Cubik ◽  
Stanislav Kepak ◽  
Andrej Liner ◽  
Martin Papes ◽  
Tomas Kajnar ◽  
...  
Keyword(s):  
Michelson Interferometer ◽  
Vibration Sensor ◽  
Polarization Maintaining ◽  
Optical Vibration

A fiber strain and vibration sensor based on high birefringence polarization maintaining fibers

2014 ◽  
Vol 322 ◽  
pp. 105-108 ◽  
Author(s):  
Juan Kang ◽  
Xinyong Dong ◽  
Yinghao Zhu ◽  
Shangzhong Jin ◽  
Songlin Zhuang
Keyword(s):  
Vibration Sensor ◽  
High Birefringence ◽  
Polarization Maintaining

The Structure Design and Analysis of Vibration Sensor

2014 ◽  
Vol 701-702 ◽  
pp. 569-572
Author(s):  
Bian Tian ◽  
Yu Long Zhao ◽  
Zhe Niu ◽  
Zhuang De Jiang ◽  
Tian Yi Zhang
Keyword(s):  
Resonant Frequency ◽  
Mechanical Model ◽  
High Sensitivity ◽  
Structure Design ◽  
Vibration Sensor ◽  
Monitoring Systems ◽  
Acceleration Sensor ◽  
Mathematical Solution ◽  
Sensor Structure ◽  
Micro Vibration

In order to establish monitoring systems for micro vibration due to electric spark occurs in the faulty cable, a novel acceleration sensing structure utilizing the piezoresistive principle is presented. The mechanical model and its mathematical solution are established, which have been developed in order to calculate the sensitivity and frequency behaviour of an acceleration sensor. The sensor is built up as a sense beam and a supplement beam is supposed to have high sensitivity, low resonant frequency and minimized lateral effect. For the designed sensor structure, the formula of stress, natural frequency and damping was derived in theory, and the optimized structure is confirmed through adjust the beams size.

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