Gunshot detection and counting method and system

Abstract

The invention provides a shot detection counting method and system. The method comprises that preprocessing as filtering is carried out on shots mainly according to the hard pulse characteristic that sound pressure is changed from negative pressure into positive pressure rapidly the moment of the shots; enframing, solving the short time amplitude and differential calculus are then carried out; and the shots are counted according to the rising edge. The method has the advantages including simple and clear principle, high calculation speed, low limitation of the distance to a relatively strong sound source, accurate detection for dense shots, and high accuracy, and can effectively inhibit influence of shot echoes and ambient noises on the detection counting result; and the system can be transplanted to a small mobile device, and is suitable for batch production of low cost.

Description

technical field [0001] The present invention relates to the field of sound signal processing, especially gunshot detection and counting technology. More specifically, the present invention relates to a gunshot detection and counting method and system. Background technique [0002] Gunshot detection counts are generally used for bullet control in shooting ranges. Ammunition safety control has always been an important task of national security. It is very important to prevent shooters from intercepting bullets and ammunition privately when shooting training in military shooting ranges or shooting games in civilian shooting ranges. At the shooting scene, how to accurately count the number of fired bullets in a complex environment to determine whether all the bullets have been fired, or whether there are bullets that have not been fired and are kept privately, is a major security problem that needs to be solved urgently. In the current bullet control system, the automatic elect...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of dense gunshots that are difficult to accurately frame and count, complex environmental noise, and the lack of applicability of the traditional sound detection and counting system to unsteady signals in the shooting environment, and provide a method based on short-term amplitude rising edge The gunshot detection and counting method and system of the judgment is mainly based on the strong pulse characteristics of the instantaneous sound pressure of the gunshot firing from a low negative pressure to a peak value, and after its differentiation, it is judged according to the rising edge

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