Potential opportunities optical distributed acoustic sensors to determine the location of the attacker

The article considered possible models and algorithms based on the analysis of features of energy and time characteristics and/or characteristics of directional pattern that consider the features of the spatial location of the signal source (or sources) for the subsequent localization of the sound source, in relation to fiber-optic sensor networks, to solve the problem of determining with a given accuracy the location of the attacker on the protected object. The most optimal model was chosen based on estimates of the difference in the delay time of acoustic signals at different reference points of the backscattering characteristic of the optical fiber of a distributed acoustic sensor (DAS). As an example, the results of calculating the deviation estimates for determining the coordinates of the sound source as a function of the noise level in a room with two optical fibers laid in parallel along opposite walls are presented.