IR Signal Spectrum Analysis of Liquid Sample using Fast Fourier Transform Techniques

Abstract

The prime intention of this research work has been to study electronics sensor for the detection of infection which are widely occur in food material. So electronic sensor system is designed in which IR signal was transmitted through the sample for the detection of infection. It was noted that there was changes occurs in all the performance parameters as sample kept for number of days by maintaining the same atmospheric condition. At different range of frequency, the amplitude of received IR signal was used to plot FFT and PSD response. Fourier transform of infrared signal is used to interpret interactions between sample and electromagnetic fields in the IR region. Therefore signal spectrum of IR signal using Fourier transform is a very powerful technique which provides information on the chemical composition of the sample.