Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2006-10-17
2006-10-17
Nguyen, Hung (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S501000, C340S506000, C340S539270, C340S577000, C340S589000
Reexamination Certificate
active
07123154
ABSTRACT:
Detecting a wildfire and an electrical arc, which are characterized by emission of ultraviolet (UV) radiation at a given wavelength, are described using a light sensor having a pulse output responsive to the given wavelength and generating an intermediate output responsive to the pulse output in a way which tracks a trend in the pulse output, irrespective of any increase in the relative number of pulses in the pulse output that is responsive to extraneous sources other than wildfire or electrical arc. The intermediate output is generated responsive to pulses occurring within an event window that continuously terminates at present time and extends backward therefrom by a selected time duration. An alarm signal is produced based on a predetermined characteristic of the intermediate output. Packaging of the sensor and alarm arrangement is described along with photo-detection tube optimization. Further, atmospheric transmission of the detected wavelength is described.
REFERENCES:
patent: 4016424 (1977-04-01), Traina
patent: 4251810 (1981-02-01), Wyatt
patent: 5165482 (1992-11-01), Smagac et al.
patent: 5931233 (1999-08-01), La Bonte et al.
patent: 6742305 (2004-06-01), Rogers et al.
Hamamatsu, Flame Sensor UV TRON R2868 spec sheet, Mar. 1998, Hamamatsu Specification Sheet.
Hamamatsu, UV TRON Driving Circuit C3704 Series spec sheet, Jul. 1997, Hamamatsu Specification Sheet.
Jursa, Handbook of Geophysics and the Space Environment, 1985, Air Force Geophysics Laboratory, Air Force Systems Command, United States Air Force, Chapter 22, Atmospheric Emission and Absorption of Ultraviolet Radiation, pp. 22-1 throught 22-7.
US Air Force, Absoption by Atmosphric Gases in UV and Visible, Web Site www/heliosat3.de/e-learning/radiative-transfer/rt/, Sep. 27, 2000, Lecture 9, pp. 1-8.
LandOfFree
Remote sensing and signaling of the presence of wildfire does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Remote sensing and signaling of the presence of wildfire, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Remote sensing and signaling of the presence of wildfire will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3684442