Design And Realization Of Gunshot Location System

Sniper is a serious threat to the lives of soldiers for its secretive whereabouts andefficient destruction efficiency In modern wars. Anti-sniper detection system can helpsoldiers to lacate sniper quickly and to fight back, which is important to protecting the livesof soldiers and enhancing military information construction.In this paper,we design a gunshot location system at the background of the sniperdetection. First, the physical phenomena of shock wave and muzzle wave is analyzed. Atarget location algorithm is designed based on the propagation model of the two kinds ofwave.An four elements spatial array is used to estimate the source location. The gunshotlocation system is based on tetrahedral array, using TMS320F28335as a signal processor,with the hardware platform placed in the base of the microphone array. The device has theadvantage of small size, light weight, easy to move and so on. The hardware platformconsists of signal conditioning and signal processing board. Microphone signal is amplifiedand filted by conditioning board and converted to digital signal by A/D. The signalprocessing board completes the task of gunfire detection, signal recognition, time-delayestimation and solution calculation.At last the result is sent to the mobile display platform.This paper focuses on the design and realization of the hardware platform and softwarealgorithms. An experiment was taken to test the location system in the fifth chapter. Whenthe source was300meters away from the microphone array, the result of azimuthmeasurement showed that the variance was in the3°or less.The result proved that gunshotlocation system has a good repeatability of measurement, indicationg that the hardwareplatform is stable and the algorithm is feasible.