Smoke and mirrors: a fiber optic smoke sensor

Henry K. Whitesel; John K. Overby; Michael J. Ransford; Patricia A. Tatem

doi:10.1117/12.191826

1 November 1994 Smoke and mirrors: a fiber optic smoke sensor

Henry K. Whitesel, John K. Overby, Michael J. Ransford, Patricia A. Tatem

Proceedings Volume 2292, Fiber Optic and Laser Sensors XII; (1994) https://doi.org/10.1117/12.191826
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

Smoke detectors in general, are usually threshold devices that frequently experience false alarms. Optical smoke detectors usually depend on the measurement of optical power absorption and scattering across an air gap and are usually threshold devices. Fiber optic sensor technology offers potential improvements for existing smoke detector technology. We have developed a new smoke sensor design based on wavelength selective absorption and scattering that generates a continuous measurement of smoke density. This technique provides first order compensation for water and dirt coatings on the optical surfaces and for optical power and ambient light changes. The sensor has a 2 inch sensing region and utilizes multimode technology with an 850 nanometer LED source. Experimental models of the fiber optic smoke sensors were tested successfully in our laboratory and on the ex-USS SHADWELL. Operational performance advantages of the fiber optic smoke sensor are expected in the areas of monitoring visibility, reducing false alarms, improving reliability, and continuous measurement of smoke density; this will improve fire detection capability and will assist in developing fire fighting strategy. Application of the sensors are planned for the shipboard environment to provide sensor input to new damage control management systems.

Citation Download Citation

Henry K. Whitesel, John K. Overby, Michael J. Ransford, and Patricia A. Tatem "Smoke and mirrors: a fiber optic smoke sensor", Proc. SPIE 2292, Fiber Optic and Laser Sensors XII, (1 November 1994); https://doi.org/10.1117/12.191826

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KEYWORDS

Sensors

Fiber optics sensors

Fiber optics

Particles

Fiber optics tests

Scattering

Spectroscopy

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