Industrial Boiler Maintenance Unclaimed

Detection wasinitially achieved utilising filters to separate the normal background noisesfrom the sound of a tube leak. With the advent of modern digital sound analysistechniques - namely Fast Fourier Transforms (FFT) - frequency spectrums aregenerated for each audio sensor. The analysis of these spectrums for acombination of frequencies determines the value of the alarm in percentage whena sensor channel is above a pre-set alarm value for a pre-set time when theleak alarm relay is activated.