21 February 2001 Design of a small passive sensor for locating vehicles, footsteps, and gunshots
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Proceedings Volume 4232, Enabling Technologies for Law Enforcement and Security; (2001) https://doi.org/10.1117/12.417552
Event: Enabling Technologies for Law Enforcement, 2000, Boston, MA, United States
Abstract
This paper describes the design of a small sensor that can detect and track different targets, namely vehicles, personnel and sniper fire. Building on previous work with portable sensors using both seismic and acoustic transducers, the goal was to design a sensor with similar functions that fits in a small projectile deployed from a standard M203 grenade launcher. We discuss methods to reduce weight, size, and power consumption. We use a shell-within- shell design in which the instrument separates from the outer body at the apex of its flight. After the separation, spring loaded arms unfold from the inner body. The unfolding arms serve multiple purposes: to hold the acoustic transducers on the periphery of a small disk with a measurement aperture larger than the shell (about 5 times the shell diameter), to stabilize the sensor in flight, and to act as a ground plane for radio transmission. An example of a hand-emplaced version using the same processor is also discussed.
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George P. Succi, George P. Succi, Daniel Clapp, Daniel Clapp, Robert Gampert, Robert Gampert, Torstein K. Pedersen, Torstein K. Pedersen, Gervasio Prado, Gervasio Prado, } "Design of a small passive sensor for locating vehicles, footsteps, and gunshots", Proc. SPIE 4232, Enabling Technologies for Law Enforcement and Security, (21 February 2001); doi: 10.1117/12.417552; https://doi.org/10.1117/12.417552
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