Overview of frequency bandwidth determination techniques of useful signal in case of leaks detection by correlation method

20th International Conference for Students and Young Scientists: Modern Techniques and Technologies

工业技术;材料科学

Faerman, V.A.^1 ; Avramchuk, V.S.^1 ; Luneva, E.E.^1

Tomsk Polytechnic University, Tomsk, Russia^1

关键词: Amplitude spectra;    Coherence function;    Correlation analysis;    Detection methods;    Determination methods;    Frequency band width;    Frequency boundaries;    Spectral composition;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/66/1/012028/pdf
DOI  :  10.1088/1757-899X/66/1/012028

来源: IOP

【 摘 要 】

In this paper an overview of useful signal detection methods on the background of intense noise and limits determination methods of useful signal is presented. The following features are considered: peculiarities of usage of correlation analysis, cross-amplitude spectrum, coherence function, cross-phase spectrum, time-frequency correlation function in case of frequency limits determination as well as leaks detection in pipelines. The possibility of using time-frequency correlation function for solving above named issues is described. Time- frequency correlation function provides information about the signals correlation for each of the investigated frequency bands. Data about location of peaks on the surface plot of a time- frequency correlation function allows making an assumption about the spectral composition of useful signal and its frequency boundaries.