| 摘要 |
PROBLEM TO BE SOLVED: To certainly detect the combustion state, based on the evaluation value obtained by a small quantity of operation. SOLUTION: This method is one which detects the combustion state of a burner device 40, based on a sound signal, and this acquires sound signals from sound detectors 1 and 1 forming a pair to a burner device 40 and gets an evaluation value, based on the cross power spectrum of these sound signals, and compares the evaluation value with a specified value thereby detecting the combustion state of the burner device. |
