Shot detection counting method and system

A counting method and technology of gunshots, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve complex environmental noise, dense gunshots, difficult to accurately frame and count, lack of applicability of unsteady signals, etc. problem, to achieve the effect of simple principle, high accuracy, and suppress the influence of echo

Active Publication Date: 2016-03-23
NAT UNIV OF DEFENSE TECH
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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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  • Shot detection counting method and system
  • Shot detection counting method and system

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[0035] Preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings, but it should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0036] The invention aims at accurately detecting and counting the gunshots under the condition that multiple people shoot at the same time in the shooting range environment, the gunshots are very dense, and the distances from different shooting points to the detection points are different. figure 1 For the specific implementation steps legend of gunshot detection counting of the present invention, below in conjunction with figure 1 and figure 2 The implementation steps of the present invention are described in detail.

[0037] 1) The gunshot signal is input to the acquisition module after passing through the microphone module, and the sampling frequency f of the ...

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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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 张文朱晓龙赵云王一博韩开锋田章福高东宝周泽民蒋小为李超
Owner NAT UNIV OF DEFENSE TECH
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