Laser radar for wide-area fire detection

Alphonsus John Fennelly; Edward L. Fry; Muamer Zukic; Michele Wilson McColgan; Douglas G. Torr

doi:10.1117/12.196102

23 November 1994 Laser radar for wide-area fire detection

Alphonsus John Fennelly, Edward L. Fry, Muamer Zukic, Michele Wilson McColgan, Douglas G. Torr

Proceedings Volume 2249, Automated 3D and 2D Vision; (1994) https://doi.org/10.1117/12.196102
Event: Optics for Productivity in Manufacturing, 1994, Frankfurt, Germany

Abstract

A Lidar system designed by the authors to detect and observe the tracks of effluents emitted by ships at sea under propulsion by combustion of fossil fuels could have many useful applications. A prototype system uses a frequency-doubled Nd:YAG laser as the transmitter, at wavelengths of 0.53 and 1.06 micrometers , and examine the return for Rayleigh, Mie, fluorescence, and Raman scattering (hence called Advanced Rayleigh-Raman-Mie, ARRM), to determine thermodynamic and chemical conditions out to a given distance surrounding the Lidar operating station. We discuss the business potential of the system, its application to a number of technical and environmental problems, the potential for job creation by the use of such systems, and their value to both the users and the rest of society. One such application is discussed to a limited extent: Wide-area surveillance for fire detection, in both urban and rural applications. Conversations with the City of Huntsville's Fire Department have revealed that the system is a quantum leap in fire detection, reporting, and hence firefighting response. Constant motion through the sky of a beam of green light could be a public nuisance. Therefore in an urban setting use of a primary surveillance transmitter consisting of a frequency-doubled CO₂ laser is necessary for initial detection of the thermodynamic and fluid-dynamic indications of the rising plume, from the Mie and Rayleigh scattering. After each detection of a new plume, the system switches to the Nd:YAG transmitter for detailed characterization of the plume from the measured ARRM parameters.

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Alphonsus John Fennelly, Edward L. Fry, Muamer Zukic, Michele Wilson McColgan, and Douglas G. Torr "Laser radar for wide-area fire detection", Proc. SPIE 2249, Automated 3D and 2D Vision, (23 November 1994); https://doi.org/10.1117/12.196102

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KEYWORDS

LIDAR

3D vision

Surveillance

Aerosols

Environmental monitoring

Raman scattering

Atmospheric particles

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