Gun Shot Detector

摘要

A gunshot detection system provides an audio and visual surveillance system, embodied within a Gunshot Detector (GSD) attached to a building's walls and ceilings and a Firearm Event Detector (FED) worn on a person's outer clothing. In both embodiments, the system of the invention detects the physical signatures of a firearm discharge, specifically sound from a muzzle blast and light from a muzzle flash. The system would be linked to a software program and/or electronic transducer(s) and/or microprocessor(s) and/or electronic Logic Circuitry (using algorithms, logic gates) that would apply one or more identification algorithms to distinguish firearm discharge from other signals. Either embodiment may be linked to an emergency notification system or to a “Guardian Barrier System” (GBS) wherein a facility or premises, for example a school, is equipped with electromagnetically releasable and electromagnetically lockable doors such that facility or premises may be automatically locked down.

主权项

1. A system and method for automatically detecting the discharge of a firearm comprising:
(a) at least one sensing means for sensing the physical signature of a firearm discharge; (b) a computing means for computing a software process; (c) said at least one sensing means for sensing the physical signature of a firearm discharge providing input to said computing means for computing a software process; (d) at least one response means for responding to a firearm discharge; (e) said at least one response means for responding to a firearm discharge being in electronic communication with said computing means for computing a software process; (f) a software process; (g) said computing means for computing a software process being configured to execute said software process; (h) a decision algorithm; (i) said software process comprising continuously monitoring said at least one sensing means for sensing the physical signature of a firearm discharge, applying said decision algorithm to determine detection or non-detection of a firearm discharge, and automatically triggering said at least one response means for responding to a firearm discharge; (j) said algorithm comprising any combination of the group of decision techniques of (i) filtering sound input by a predetermined range of sound pressure levels; (ii) filtering sound input by sound duration; (iii) filtering sound input by band pass filtration according to predetermined frequency ranges; (iv) comparing detected sound to a database of gunshot muzzle blasts; (v) filtering light input by a predetermined range of brightness levels; (vi) filtering light input by illumination duration; (vii) filtering light input by band pass filtration according to predetermined wavelength ranges; (viii) comparing detected light to a database of gunshot muzzle flashes; or (ix) calculating distance between said system and a firearm discharge by the difference in time between the muzzle blast and muzzle flash and using the resulting distance as a limiting condition.