G - Physics – 08 – B
Patent
G - Physics
08
B
340/102
G08B 17/12 (2006.01) F23N 5/08 (2006.01)
Patent
CA 1247208
DUAL SPECTRUM FREQUENCY RESPONDING FIRE SENSOR Abstract of the Disclosure Apparatus for sensing the ex(i)stence of a fire and providing a warning, if desired, with improved discrimination against the possibility of false alarms. Dual channel detectors are used, one detector being set to respond to incident radiation having a wavelength in the range of 0.8 to 1.1 microns while the other wavelength range is significantly displaced therefrom, being selected for wavelengths in the range from 14 to 25 microns. Reliability of true signal detection is further improved by the provision of separate flame flicker bandpass filters in the respective channels, these bandpass filters being set for different passbands. Circuits providing ratio discrimination, threshold detectors and delay circuitry are combined with the dual spectrum detectors and disparate flicker frequency filters to achieve improved performance. In addition, the dynamic range of instrument sensitivity is substantially increased by utilizing preamplifiers with wide gain variability controlled by automatic gain control circuits in the dual channel circuitry.
477273
Kern Mark T.
Shamordola Kenneth A.
Santa Barbara Research Center
Sim & Mcburney
LandOfFree
Dual spectrum frequency responding fire sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dual spectrum frequency responding fire sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual spectrum frequency responding fire sensor will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1232181