Paper Title:
Plastic Optical Fiber Displacement Sensor for Cracks Monitoring
  Abstract

In the following we present a low-cost optical system for cracks evolution monitoring. The transducer principle is based on the variation of light transmitted between two facing fibers with their axial distance, exploiting the unique light-collecting capabilities of large-core polymer optical fibers. The characterization shows that the working range of the transducer is up to 3.5cm, with a resolution of 10$m and a repeatability of 5$m. With our current custom-developed control unit, up to four transducers can be arranged to provide a multi-axial displacement sensor or to simultaneously monitor four points for distributed sensing. A closed-loop light modulation/detection scheme is implemented to reduce the environmental noise sensitivity. The control unit is interfaced to a PC via USB port or via GSM/GPRS modem to automatically send periodical reports of the measurements and to issue warnings in case of displacements above a given threshold. Extensive tests in an environmental chamber have been carried out in order to extract calibration curves and to compensate for day-night and summer-winter temperature fluctuations.

  Info
Periodical
Edited by
L. Garibaldi, C. Surace, K. Holford and W.M. Ostachowicz
Pages
487-492
DOI
10.4028/www.scientific.net/KEM.347.487
Citation
M. Olivero, G. Perrone, A. Vallan, S. Abrate, "Plastic Optical Fiber Displacement Sensor for Cracks Monitoring", Key Engineering Materials, Vol. 347, pp. 487-492, 2007
Online since
September 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: G.J. Hwang, W.H. Ko
Abstract:A multi-fiber reflection displacement micrometer is developed. The device consists of a light source and a receiving fiber-array of identical...
307
Authors: Ming Wang, Dong Mei Guo
Abstract:In order to improve the displacement measurement accuracy of the laser diode self-mixing interference (SMI), phase measurement method is...
247
Authors: Gang Zheng, Gui Qian Li
Abstract:Based on the basic requirements of current Guidelines for Seismic Design of Highway Bridges, the orthogonal quasi-static test of four factors...
547
Authors: Si Si Liu, Xue Liang Jiang
Chapter 1: Geological and Geotechnical Engineering
Abstract:According to energy principle, numerical methods of axial force and displacement of tension-type anchor are derived. Firstly, mechanism of...
63
Authors: Zhong Ling Zong, Zhen Dong Zhang, Dong Rui Yao
Chapter 9: Monitoring and Control of Structures
Abstract:Based on the analysis of the cause of destruction and damage mechanism, safety monitoring and control technology of artificial island...
2962