Pipeline identification in a TDOA experiment [articol]

Abstract

The time difference of arrival (TDOA) related to single input/two output systems has many practical applications. Using a kind of system identification applied to a water pipeline, this paper proves that the supposed linear relation between TDOA and the phase angle of the crossspectral power density of the output signals is valid only in a limited frequency range. This conclusion shows the importance of low frequency components in the measured leak signals for TDOA estimation and leak localization. The model proposed for system identification can be utilized with the main advantage of taking the correlation between the extraneous noise signals into account.