Flame Sensor Inspection for Stable Combustion State Detection

The patent transforms the discharge current parameter into a discharge probability parameter by counting discharge occurrences over multiple measurement cycles. This parameter transformation eliminates the influence of power supply voltage fluctuations while maintaining operational simplicity. The discharge probability is calculated as the ratio of discharge occurrence times to total measurement cycles, providing a stable metric for combustion state determination.

The patent performs a fixed number of measurement cycles (excessive action) to ensure statistical reliability of discharge probability, then stops measurements once the predetermined number is reached regardless of whether convergence is achieved. This approach prevents excessive time consumption while maintaining measurement precision through sufficient sampling.

The patent segments the flame measurement into multiple spatial regions by positioning multiple flame sensors at different locations within the combustion chamber. Each sensor measures discharge probability in its specific region, enabling detection of local flame state variations. The segmentation approach maintains low device complexity by using simple ultraviolet detection tubes positioned at strategic locations.