Fiber optic pore water pressure sensor for civil engineering applications

Barry G. Grossman; Paul J. Cosentino; Shinobu Doi; Girish Kumar; John Verghese

doi:10.1117/12.166869

7 February 1994 Fiber optic pore water pressure sensor for civil engineering applications

Barry G. Grossman, Paul J. Cosentino, Shinobu Doi, Girish Kumar, John Verghese

Proceedings Volume 2072, Fiber Optic Physical Sensors in Manufacturing and Transportation; (1994) https://doi.org/10.1117/12.166869
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

Low cost, rugged and reliable fiberoptic sensors are being developed to meet the needs of geotechnical engineers. The primary emphasis has been on load and pressure sensors, including pore water pressure sensors. The microbend sensors developed have been tested in the laboratory up to water pressures of 100 psi and loads of 50 lb. Accuracy of sensor measurements are within 5% and is being improved upon. Sensors with larger range or more sensitivity can easily be built without changing the basic sensor design. A semi-automated calibration and testing system was developed to characterize the sensors. In this paper we describe some of the applications for the sensors, their construction, characterization system, and experimental performance.

Citation Download Citation

Barry G. Grossman, Paul J. Cosentino, Shinobu Doi, Girish Kumar, and John Verghese "Fiber optic pore water pressure sensor for civil engineering applications", Proc. SPIE 2072, Fiber Optic Physical Sensors in Manufacturing and Transportation, (7 February 1994); https://doi.org/10.1117/12.166869

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