Optical fiber grating-based sensing system for use in pavement health monitoring

2008 ◽  
Author(s):  
Jian-Neng Wang ◽  
Jaw-Luen Tang
Keyword(s):  
Optical Fiber ◽  
Health Monitoring ◽  
Fiber Grating ◽  
Sensing System

A Multiple Fiber Grating Sensor System Using Code Division Multiple Access

2013 ◽  
Vol 765-767 ◽  
pp. 2444-2447 ◽  
Author(s):  
Wei Li ◽  
Yong Jia Zhang ◽  
Hong Qiao Wen
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Simulation Experiment ◽  
Fiber Grating ◽  
Sensing System ◽  
Fiber Grating Sensor ◽  
Fbg Sensors ◽  
Code Division Multiple

In order to increase the multiplying density of Fiber Bragg Grating (FBG) sensors, a novel FBG Sensing System based on CDMA technology has been developed. Simulation experiment indicates the CDMA technology combine with optical fiber grating sensing system together successfully. Furthermore, the system can distinguishes the FBG and enhance the FBG network band utilization.

Optical Fiber Grating Temperature and Axial Tension Sensing System Based on Swept Source

2017 ◽  
Vol 54 (4) ◽  
pp. 040601
Author(s):  
苏红 Su Hong ◽  
王健 Wang Jian ◽  
刘岚岚 Liu Lanlan ◽  
吴重庆 Wu Chongqing
Keyword(s):  
Optical Fiber ◽  
Fiber Grating ◽  
Swept Source ◽  
Sensing System ◽  
Axial Tension

scholarly journals Dynamic Responses Measured by Optical Fiber Sensor for Structural Health Monitoring

2019 ◽  
Vol 9 (15) ◽  
pp. 2956 ◽  
Author(s):  
Shiuh-Chuan Her ◽  
Shin-Chieh Chung
Keyword(s):  
Optical Fiber ◽  
Dynamic Strain ◽  
Fiber Grating ◽  
Base Excitation ◽  
Long Period ◽  
Fiber Sensing ◽  
Fbg Sensor ◽  
Sensing System ◽  
Optical Fiber Sensing ◽  
Period Fiber Grating

An optical fiber sensing system integrating a fiber Bragg grating (FBG) sensor, a long-period fiber grating (LPFG) optical filter and a photodetector is presented to monitor the dynamic response of a structure subjected to base excitation and impact loading. The FBG sensor is attached to a test specimen and connected to an LPFG filter. As the light reflected from the FBG sensor is transmitted through the long-period fiber grating filter, the intensity of the light is modulated by the wavelength, which is affected by the strain of the FBG. By measuring the intensity of the light using a photodetector, the wavelength reflected from the FBG sensor can be demodulated, thus leading to the determination of the strain in the structure. To demonstrate its effectiveness, the proposed sensing system was employed to measure the dynamic strain of a beam subjected to mechanical testing. The mechanical tests comprised three load scenarios: base excitation by a shaker at resonant frequency, impact loading by a hammer and shock test on a drop table. To monitor the dynamic strain during the test and validate the accuracy of the measurement of the FBG sensor, strain gauge was used as reference. Experimental results show good correlation between the measurements of FBG sensor and strain gauge. The present work provides a fast response and easy-to-implement optical fiber sensing system for structural health monitoring based on real-time dynamic strain measurements.

Low-cost optical fiber temperature-sensing system employing optical transceivers for Ethernet and long-period fiber grating

2019 ◽  
Vol 58 (9) ◽  
pp. 2366 ◽  
Author(s):  
Osanori Koyama ◽  
Makoto Matsui ◽  
Takuro Kagawa ◽  
Yuta Suzuki ◽  
Kanami Ikeda ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Low Cost ◽  
Temperature Sensing ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Sensing System ◽  
Period Fiber Grating ◽  
Optical Transceivers

Optical fiber based sensing system design for the health monitoring of multi-layered pavement structure

2011 ◽  
Author(s):  
Wanqiu Liu ◽  
Huaping Wang ◽  
Zhi Zhou ◽  
Shiyu Li ◽  
Yuanbao Ni ◽  
...  
Keyword(s):  
Optical Fiber ◽  
System Design ◽  
Health Monitoring ◽  
Sensing System ◽  
Pavement Structure

scholarly journals A Plastic Optical Fiber Sensing System for Bridge Deflection Measurement

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 480
Author(s):  
Dong Yang ◽  
Jin-Qi Wang ◽  
Wei-Xin Ren ◽  
Jing Zhang
Keyword(s):  
Optical Fiber ◽  
Health Monitoring ◽  
High Reliability ◽  
Intensity Change ◽  
Plastic Optical Fiber ◽  
Sensing Element ◽  
Future Health ◽  
Test Beam ◽  
Sensing System ◽  
Deflection Measurement

Deflection is one of the key parameters that reflects the state of a bridge. However, deflection measurement is difficult for a bridge that is under operation. Most existing sensors and measuring techniques often do not meet the requirements for health monitoring for various types of bridges. Therefore, based on changes of optical fiber intensity, a novel sensing system using connected pipes to measure bridge deflection in different positions is proposed in this paper. As an absolute reference, the liquid level position along the structure is adopted for the deflection measurement, and an additional external reference to the ground is not needed in this system. The proposed system consists of three parts: connected pipes to connect the measurement points along the structure, liquid to fill in the connected pipes, and the sensing element to detect the change of level. A plastic optical fiber sensor based on the intensity change is used as the sensing element of the developed system. Then, a set of experimental tests are conducted for performance evaluation purposes. Results show that this system has an accurate linear response and high reliability under various environmental conditions. The deflection of the test beam measured by the sensor agrees with linear variable differential transformer (LVDT) within an error margin of 2.1%. The proposed system shows great potential applicability for future health monitoring of long-span bridges.

Optical fiber grating sensor network based on highly reliable fibers and components for spacecraft health monitoring

2001 ◽  
Author(s):  
Wolfgang Ecke ◽  
Stephan Grimm ◽  
Ines Latka ◽  
Arnd Reutlinger ◽  
Reinhardt Willsch
Keyword(s):  
Optical Fiber ◽  
Sensor Network ◽  
Health Monitoring ◽  
Fiber Grating ◽  
Fiber Grating Sensor

HEALTH MONITORING OF STEEL CABLES BY INTERROGATION OF OPTICAL FIBER GRATING SENSORS

2002 ◽  
Vol 252 (3) ◽  
pp. 573-576 ◽  
Author(s):  
F.G. TOMASEL ◽  
O.D. CORTÁZAR ◽  
P.A.A. LAURA
Keyword(s):  
Optical Fiber ◽  
Health Monitoring ◽  
Fiber Grating ◽  
Steel Cables
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