Balanced charge flame characterization system and method

Details Balanced charge flame characterization system and method Balanced charge flame characterization system and method

1999-06-21

2000-07-04

Wu, Daniel J.

Communications: electrical

Condition responsive indicating system

Specific condition

340579, 341 66, G08B 1712

Patent

active

06084518&

ABSTRACT:
A sensor for detecting characteristics of a flame includes a pair of electrodes that are spaced apart for passing an electric current through the flame. A pulse width modulator is coupled to the electrodes and generates an alternating current which flows through the flame. A controller operates the pulse width modulator to alter the duty cycle of the alternating current so that the average current through the flame is zero. Flame characteristic information is derived from the lengths of the positive and negative periods of the resultant alternating current.

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patent: 5577905 (1996-11-01), Momber et al.
patent: 5698952 (1997-12-01), Stebbins

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