Flame sensor with dynamic sensitivity adjustment

Details Flame sensor with dynamic sensitivity adjustment Flame sensor with dynamic sensitivity adjustment

1998-03-13

2000-01-11

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

Flame light source

340577, G01J 314

Patent

active

060139196

ABSTRACT:
The present invention provides a flame sensor having dynamic sensitivity adjustment, wherein the sensitivity of the flame detector can be adjusted by varying the gain of a signal conditioning circuit associated with the flame detector. The flame detector includes a photodiode, such as, for example, a silicon carbide (SiC) photodiode, that, when exposed to electromagnetic radiation having a wavelength in the range of from about 190-400 nanometers, and preferably within the ultraviolet range. The photodiode generates a photocurrent proportional to the ultraviolet light intensity to which it is exposed. The output of the photodiode is processed and amplified by signal conditioning circuitry to produce a signal indicative of the presence of a flame. Moreover, a cutoff wavelength for silicon carbide photodiodes is preferably in the range of about 400 nanometers, which renders the photodiode "blind" to potentially interfering blackbody radiation from the walls of the turbine.

REFERENCES:
patent: 5257496 (1993-11-01), Brown et al.
patent: 5303684 (1994-04-01), Brown et al.
patent: 5394005 (1995-02-01), Brown et al.
patent: 5467185 (1995-11-01), Engeler et al.
patent: 5480298 (1996-01-01), Brown
patent: 5487266 (1996-01-01), Brown
patent: 5589682 (1996-12-01), Brown et al.
patent: 5670784 (1997-09-01), Cusack et al.

Affiliated with

Also associated with

Rating

Flame sensor with dynamic sensitivity adjustment does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flame sensor with dynamic sensitivity adjustment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flame sensor with dynamic sensitivity adjustment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1464277