US 6,784,430 B2 · Interdigitated flame sensor, system and method

Abstract

A flame sensor for combustion flame temperature determination comprises elongated extensions that are positioned with parallel interdigitated longitudinal axis with respect to one another. An optical spectrometer comprises the sensor and a system comprises the sensor. A method for combustion flame temperature determination comprises obtaining a first photodiode signal and a second photodiode signal by using photodiode devices comprising photodiodes with elongated extending interdigitated digits. A method of fabricating a flame sensor for combustion flame temperature determination, comprises forming first and second photodiodes with elongated extending interdigitated digits.

Claims18

Dependent claims

A flame sensor for combustion flame temperature determination, comprising:

a first photodiode formed with elongated extending digits and having a range of optical responsivity within an OH band for producing a first output signal;
and
a second photodiode formed with elongated extending digits and having a range of optical responsivity in a different and overlapping portion of the OH band than the first photodiode device OH band for producing a second output signal;
wherein the elongated digits are positioned with parallel interdigitated longitudinal axis with respect to one another.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/277,940Filed 23 Oct 2002 · continuation in part

Priority

8 Feb 1999

Published

US 2003/0080294 A11 May 2003

Granted

31 Aug 2004

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G01J 5/0014
Radiation pyrometry, e.g. infrared or optical thermometry: for sensing the radiation from gases, flames
G01J 1/42
Photometry, e.g. photographic exposure meter: using electric radiation detectors
G01J 5/602
Using determination of colour temperature: using selective, monochromatic or bandpass filtering
G01J 1/0488
Optical or mechanical part supplementary adjustable parts: with spectral filtering

Family

Application09/246,861Parent of this continuation-in-part · filed 8 Feb 1999

Application09/793,432Parent of this continuation-in-part · filed 27 Feb 2001

US 2003/0080294 A1Pre-grant publication · published 1 May 2003

US 6,646,265 B2Parent of this continuation-in-part

US 6,239,434 B1Parent of this continuation-in-part

US 2001/0009268 A1Published application

US 6,784,430 B2This patent

From the US filing history. Foreign family members aren’t listed.

Interdigitated flame sensor, system and method

Life of this patent

Interdigitated flame sensor, system and method

Life of this patent

Abstract

Claims18