High-spatial-resolution ultrasonic sensor using a fiber-optic Fabry–Perot interferometer

2019 ◽  
Vol 453 ◽  
pp. 124422 ◽  
Author(s):  
Xunli Yin ◽  
Yedi Shen ◽  
Dan Su ◽  
Zhihua Shao
Keyword(s):  
Spatial Resolution ◽  
Fiber Optic ◽  
High Spatial Resolution ◽  
Ultrasonic Sensor ◽  
Fabry Perot

High Spatial Resolution Crack Monitoring in Concrete Structures Using a Distributed Fiber Optic Sensor

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Kevin (Wenhai) Li ◽  
Michel Gaudet
Keyword(s):  
Spatial Resolution ◽  
Fiber Optic ◽  
High Spatial Resolution ◽  
Early Stage ◽  
Large Strain ◽  
Fiber Optic Sensor ◽  
Crack Location ◽  
Four Point Bending ◽  
Optic Sensor ◽  
Distributed Fiber Optic Sensor

Abstract A method to monitor the mechanical behavior and identify crack location and growth in a concrete structure element using a distributed fiber optic sensor (FOS) system is demonstrated experimentally by testing concrete specimens in four-point bending. The sensor system consisted of an optical frequency domain reflectometry (OFDR) interrogator unit paired with an all-grating sensing fiber that was bonded to the surface of the concrete test specimen. Strain measurements with high spatial resolution of <10 mm were obtained at various points along a single fiber cable. Large strain values at the crack locations indicated strain concentrations that could be used to assess the crack growth. The distributed sensing system demonstrated the capability to detect localized, early stage cracks, with crack width smaller than 0.1 mm, well before they become observable by visual inspection.

scholarly journals Crack Detection Using Fiber Optic Distributed Sensor with High Spatial Resolution

2003 ◽  
Vol 41 (7) ◽  
pp. 29-33
Author(s):  
H. Kumagai ◽  
H. Iwaki ◽  
Sean Soon Leng Ong ◽  
K. Hotate
Keyword(s):  
Spatial Resolution ◽  
Crack Detection ◽  
Fiber Optic ◽  
High Spatial Resolution ◽  
Distributed Sensor

3D imaging of mural model in air using sensitivity-improved ultrasonic sensor based on fiber-optic Fabry-Perot interferometer

Optik ◽  
2019 ◽  
Vol 185 ◽  
pp. 1205-1212
Author(s):  
Chi Zuo ◽  
Tingting Gang ◽  
Manli Hu ◽  
Xiaohong Bai ◽  
Rongxin Tong ◽  
...  
Keyword(s):  
3D Imaging ◽  
Fiber Optic ◽  
Ultrasonic Sensor ◽  
Fabry Perot

scholarly journals Directional Sensitivity of a MEMS-Based Fiber-Optic Extrinsic Fabry–Perot Ultrasonic Sensor for Partial Discharge Detection

Sensors ◽  
2018 ◽  
Vol 18 (6) ◽  
pp. 1975 ◽  
Author(s):  
Wenrong Si ◽  
Chenzhao Fu ◽  
Delin Li ◽  
Haoyong Li ◽  
Peng Yuan ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Partial Discharge ◽  
Ultrasonic Sensor ◽  
Directional Sensitivity ◽  
Fabry Perot ◽  
Discharge Detection
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