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Development of Load Cell Using Fiber Brags Grating Sensors and Differential Method for Structural Health Monitoring  

Kim, Dae-Hyun (Seoul National University of Technology, Department of Mechanical Engineering)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.29, no.4, 2009 , pp. 299-307 More about this Journal
Abstract
Emerging fiber optic sensor technologies have shown great potential to overcome the difficulties associated with conventional sensors. Fiber optic sensors are immune to EM noise and electric shock and thus can be used in explosion-prone areas. Several kinds of fiber optic sensors have been developed over the last two decades to take advantage of these merits. There have also been many field applications of fiber optic sensors for structural health monitoring as NDT/HDE. However, very few sensors, particularly a load cell have been successfully commercialized. This Paper Presents a load cell using fiber Bra99 gra1ing (FBG) sensors. The shape of the load cell is a link type, and three FBG sensors are used for measuring strains at three different points. Especially, these strains are processed with a differential method in order to exclude common mode noise such as temperature. Moreover, the sensitivity, the linearity and the resolution of the load cell were successfully verified from the experiment of tension test.
Keywords
Load Cell; Fiber Bragg Grating Sensor; Differential Method; Linearity;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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