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Proceedings Paper

Liquid crystalline fiber optic colorimeter for hydrostatic pressure measurement
Author(s): Tomasz R. Wolinski; Waldemar K. Bajdecki; Andrzej W. Domanski; Miroslaw A. Karpierz; Witold Konopka; T. Nasilowski; Marek Wojciech Sierakowski; Marcin Swillo; Roman S. Dabrowski; Edward Nowinowski-Kruszelnicki; Janusz Wasowski
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Paper Abstract

This paper presents results of tests performed on a fiber optic system of liquid crystalline transducer for hydrostatic pressure monitoring based on properties of colorimetry. The system employs pressure-induced deformations occurring in liquid crystalline (LC) cells configured in a homogeneous Frederiks geometry. The sensor is compared of a round LC cell placed inside a specially designed pressure chamber. As a light source we used a typical diode operating at red wavelength and modulated using standard techniques. The pressure transducer was connected to a computer with a specially designed interface built on the bas of advanced ADAM modules. Results indicate that the system offers high response to pressure with reduced temperature sensitivity and, depending on the LC cell used, can be adjusted for monitoring of low hydrostatic pressures up to 6 MPa. These studies have demonstrated the feasibility of fiber optic liquid crystal colorimeter for hydrostatic pressure sensing specially dedicated to pipe- lines, mining instrumentation, and process-control technologies.

Paper Details

Date Published: 24 August 2001
PDF: 4 pages
Proc. SPIE 4535, Optical Sensing for Public Safety, Health, and Security, (24 August 2001); doi: 10.1117/12.438445
Show Author Affiliations
Tomasz R. Wolinski, Warsaw Univ. of Technology (Poland)
Waldemar K. Bajdecki, Warsaw Univ. of Technology (Poland)
Andrzej W. Domanski, Warsaw Univ. of Technology (Poland)
Miroslaw A. Karpierz, Warsaw Univ. of Technology (Poland)
Witold Konopka, Warsaw Univ. of Technology (Poland)
T. Nasilowski, Warsaw Univ. of Technology (Poland)
Marek Wojciech Sierakowski, Warsaw Univ. of Technology (Poland)
Marcin Swillo, Warsaw Univ. of Technology (Sweden)
Roman S. Dabrowski, Military Univ. of Technology (Poland)
Edward Nowinowski-Kruszelnicki, Military Univ. of Technology (Poland)
Janusz Wasowski, Mera-Pnefal SA (Italy)


Published in SPIE Proceedings Vol. 4535:
Optical Sensing for Public Safety, Health, and Security

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