Liquid crystalline fiber optic colorimeter for hydrostatic pressure measurement

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

doi:10.1117/12.438445

24 August 2001 Liquid crystalline fiber optic colorimeter for hydrostatic pressure measurement

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

Author Affiliations +

Proceedings Volume 4535, Optical Sensing for Public Safety, Health, and Security; (2001) https://doi.org/10.1117/12.438445
Event: Systems of Optical Security, 2000, Warsaw, Poland

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.

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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, and Janusz Wasowski "Liquid crystalline fiber optic colorimeter for hydrostatic pressure measurement", Proc. SPIE 4535, Optical Sensing for Public Safety, Health, and Security, (24 August 2001); https://doi.org/10.1117/12.438445

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