TY - GEN
T1 - Micro FBG vibration sensor system for civil infrastructure
AU - Kazama, H.
AU - Mita, A.
PY - 2003/12/1
Y1 - 2003/12/1
N2 - A simple mechanism for a vibration sensor based on fiber Bragg grating (FBG) is proposed. The mechanism utilizes the gravity force to allow the maximum sensitivity of the sensor into vertical direction while the minimum sensitivity for other two transverse directions. The sensor consists of an FBG cable and several masses to form a vibration system. The cable is extended to introduce a certain tensile force and acts as a spring. The sensitivity of the sensor is more than 1μstrain/gal for vertical direction. This simple sensor has been developed for damage detection of large structures. Several prototypes were fabricated. And extensive shake table tests were conducted to examine the performance. Because of the nonlinear behavior of the spring, it was found that the sharp peak will be elapsed beyond certain vibration level. This phenomenon is very useful to make the sensor as simple as possible without adding any damper element.
AB - A simple mechanism for a vibration sensor based on fiber Bragg grating (FBG) is proposed. The mechanism utilizes the gravity force to allow the maximum sensitivity of the sensor into vertical direction while the minimum sensitivity for other two transverse directions. The sensor consists of an FBG cable and several masses to form a vibration system. The cable is extended to introduce a certain tensile force and acts as a spring. The sensitivity of the sensor is more than 1μstrain/gal for vertical direction. This simple sensor has been developed for damage detection of large structures. Several prototypes were fabricated. And extensive shake table tests were conducted to examine the performance. Because of the nonlinear behavior of the spring, it was found that the sharp peak will be elapsed beyond certain vibration level. This phenomenon is very useful to make the sensor as simple as possible without adding any damper element.
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M3 - Conference contribution
AN - SCOPUS:25144494931
SN - 9058096483
SN - 9789058096487
T3 - Structural Health Monitoring and Intelligent Infrastructure - Proceedings of the 1st International Conference on Structural Health Monitoring and Intelligent Infrastructure
SP - 1267
EP - 1275
BT - Structural Health Monitoring and Intelligent Infrastructure - Proceedings of the 1st International Conference on Structural Health Monitoring and Intelligent Infrastructure
T2 - 1st International Conference on Structural Health Monitoring and Intelligent Infrastructure, SHMII-1'2003
Y2 - 13 November 2003 through 15 November 2003
ER -