Acoustical Seismic Detection System

During the early years of its efforts afoat 1 developed and deployed a variety of detection systems including acoustic seismic and radiological to discover nuclear tests and monitor foreign nuclear activities generally such as the production of fissile materials plutonium and enriched uranium.

Acoustical seismic detection system.

Stevens institute of technology has built acoustic seismic aircraft detection asad system that demonstrated detection tracking and. 120 guidebook on detection technologies and systems for humanitarian demining project description this is an applied research project to advance and characterise the performance of a landmine detection technology based on acoustic to seismic coupling or direct seismic energy to excite resonances in the buried mine. Acoustic waves radiating from a sound source above the ground excite biot type i and ii compressional waves in the porous soil. An acoustic to seismic system to detect buried antipersonnel mines exploits airborne acoustic waves penetrating the surface of the ground.

Firstly tus background is recalled then drawbacks and advantages of acoustic and seismic system are briefly discussed. The type i wave and type ii waves refract toward the normal and cause air and soil particle motion. Depending on the application requirements they include either stand alone acoustic seismic sensor or networks of acoustic sensors. Passive acoustic localization of small aircraft low flying aircraft lfa may be used to smuggle illicit drugs or illegal immigrants across borders.

Acoustic location is the use of sound to determine the distance and direction of its source or reflector. Drones detection localisation and classification. Visual observation still remains important supplemented by telescopes cameras heat sensing devices low light level devices radar acoustic seismic chemical and nuclear detection devices. Multimodal non visual sensing systems have also been proposed in particular use of acoustic sensor systems for vehicle detection and seismic sensor systems for people detection e g see 9.