Shooting range estimation method based on miss distance and weapon caliber prediction for firearms
AssigneeAselsan Elektronik San. Ve Tic. A. S.
InventorsEmir Dogan, Alper Bereketli, Mehmet Donus
Life of this patent
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Abstract
A method providing an estimation of a shooting range with high accuracy by a miss distance estimation and a weapon caliber classification following detection of shooting of firearms with supersonic bullets, and by using novel equations constructed from field shooting data for each caliber in order to ensure a security of a patrol station, a border, troops, a society, a vehicle and a convoy is provided.
Claims5
A method for prediction of a shooting range by a detection of acoustic signals from shooting of firearms with supersonic bullets by at least one microphone without need for any parameter adjustment or preliminary information, comprising the process steps of:
- detection of a shock wave and a muzzle blast from the detected acoustic signals,
- calculation of a shock wave central frequency by using a Fast Fourier Transform method
- estimation of an arrival time difference between the shock wave and the muzzle blast,
- estimation of a miss distance based on bullet speed, sound speed and shock wave signal slope,
- estimation of a bullet caliber based on the miss distance frequency and the shock wave central frequency,
- estimation of the shooting range by use of the arrival time difference calculated between the shock wave and the muzzle blast, the miss distance prediction and the weapon caliber prediction,
- wherein the shock wave signal slope can be calculated by dividing a difference between maximum signal power and minimum signal power by a difference between a time in which the signal power is minimum and a time in which the signal power is maximum.
A method for prediction of a shooting range by a detection of acoustic signals from shooting of firearms with supersonic bullets by at least one microphone without need for any parameter adjustment or preliminary information, comprising the process steps of:
- detection of a shock wave and a muzzle blast from the detected acoustic signals,
- calculation of a shock wave central frequency by using a Fast Fourier Transform method
- estimation of an arrival time difference between the shock wave and the muzzle blast,
- estimation of a miss distance based on bullet speed, sound speed and shock wave signal slope,
- estimation of a bullet caliber based on the miss distance frequency and the shock wave central frequency,
- estimation of the shooting range by use of the arrival time difference calculated between the shock wave and the muzzle blast, the miss distance prediction and the weapon caliber prediction,
- wherein the miss distance can be calculated according to formula below;
- d
- miss
- =
- k
- 1
-
- [
- (
- v
- 0
- c
- )
- 2
- -
- 1
- ]
-
- c
- 2
- v
- 0
-
- 1
- s
- sw
- wherein;
- “dmiss” is the miss distance, “k1” is a fixed coefficient, “v0” is a bullet speed of constant 800 m/s, “c” is a sound speed and “ssw” is the shock wave signal slope.
A method for prediction of a shooting range by a detection of acoustic signals from shooting of firearms with supersonic bullets by at least one microphone without need for any parameter adjustment or preliminary information, comprising the process steps of:
- detection of a shock wave and a muzzle blast from the detected acoustic signals,
- calculation of a shock wave central frequency by using a Fast Fourier Transform method
- estimation of an arrival time difference between the shock wave and the muzzle blast,
- estimation of a miss distance based on bullet speed, sound speed and shock wave signal slope,
- estimation of a bullet caliber based on the miss distance frequency and the shock wave central frequency,
- estimation of the shooting range by use of the arrival time difference calculated between the shock wave and the muzzle blast, the miss distance prediction and the weapon caliber prediction,
- wherein a miss frequency can be calculated according to formula below;
- f
- miss
- =
- a
- 0
- +
- a
- 1
-
- d
- miss
- +
- a
- 2
-
- d
- miss
- 2
- +
- a
- 3
-
- d
- miss
- 3
- wherein;
- “fmiss” is the miss frequency, “α0, α1, α2, α3” are the fixed coefficients and “dmiss” is the miss distance.
Dependencies are inferred from the claim text.