محمود پاک نیت جهرمی

In this studym an oscillating flame detector based on frequency measurment, amplitude variation and distance between the transient pulses outputs produced in the torch was designed. Oscillating flame from a mixture of gas (propane and butane) and air is created in an opem steel pipe and the CL2 was chosen as an example for decomposition. Then, the changes to the oscillating flame produced are recorded with the CCD camera. After separation of sound from image, the examinations were performed. Signal Lab, Ocean Audio, and Excel softweres were used for data analysis. The time series of sound pulses generated normally contains three distinct parts of flame flash back, explosion and exticntion. The frequencies, constituting a wave can be revealed using Fourier analysis by spectrum. After injection of analyte, the intensity of the pulse and the time interval between the peaks will change. Changes in pulse intensity and pulse intervals were obtained from the image analysis of the Spectrogran and time series of sound tracks.