High spatial resolution of the rotational sensor array in the explosion sources localization

Abstract

Abstract In the face of increasing security requirements, threat identification requires technology with uncompromising sensitivity and responsiveness. This article presents a sensor with enhanced sensitivity, designed to detect rotational ground movement. Its physical basis on the Sagnac effect provides an absolute measurement of rotation. From a geotechnical and engineering perspective, the configuration of several such sensors enables precise determination of the epicentral coordinates of seismic events and identification of local material degradation zones, where differences in signal transit time and amplitude between individual network nodes provide the basis for mapping discontinuities in the studied medium. The primary goal of the presented research was to verify the feasibility of creating an integrated sensor array capable of precisely monitoring a defined area. Using highly correlated sensors with time synchronization of the order of 10 ns we obtained signals from artificial disturbances. The time-of-arrival analysis of recorded sensor signals successfully demonstrated the ability to quickly determine the locations of explosions. The presented solution offers new perspectives for early warning systems, providing not only threat detection but also accurate spatial positioning of threats using highly sensitive rotational sensors.