SE546705C2

SE546705C2 - A three-dimensional location of miss and hit system

Info

Publication number: SE546705C2
Application number: SE2250690A
Authority: SE
Inventors: Jonas Genchel; Mikael Sundberg; Sebastian Thuné
Original assignee: Sytrac Ab
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2025-02-11
Also published as: CN119343577A; US20250314465A1; WO2023239289A1; EP4537046A4; SE2250690A1; EP4537046A1; AU2023282755A1

Abstract

A three-dimensional LOMAH system (100) for locating shots from bullets, comprising a target platform (30) with a processor (2), a memory (4) and a sensor array, the sensor array comprising acoustic sensors (6, 8, 10, 12) arranged in two rows, wherein the memory (4) comprises instructions which when executed by the processor (2) causes the three-dimensional LOMAH system (100) to detect shot information about a shot generated by a shooter and passing proximate the target platform (30), register the time of detection for each acoustic sensor (6, 8, 10, 12), create a set of time vectors, input the set of time vectors into a target calculation module (40), which target calculation module (40) is configurable, with use of a set of training data to calculate a bullet impact and trajectory based on the input set of time vectors and output the bullet impact and trajectory on a display (50).

Claims

1. A three-dimensional Location Of Miss And Hit, LOMAH, system (100) for Iocating shots from supersonic bullets, comprising a target platform (30) in which a processor (2) and a memory (4) are provided and a sensor array is provided on the upper surface of the target platform (30), the sensor array comprising at least four acoustic sensors (6, 8, 10, 12) arranged in two rows wherein the memory (4) comprises instructions which when executed by the processor (2) causes the three-dimensional LOMAH system (100) to: - detect, with the acoustic sensors (6, 8, 10, 12), shot information about a shot generated by a shooter and passing proximate the target platform (30), - register the time of detection for each acoustic sensor (6, 8, 10, 12), - create a set of time vectors for every combination of two acoustic sensors (6-8; 6-10; 6-12; 8-10; 8-12; 10-12) based on the registered time of detection, characterized by - input the set of time vectors into a target calculation module (40) trained using a Machine Learning, ML, model that has been subjected to a large amount of training data by using randomized input data including ambient temperature and position of a shooter, which target calculation model (40) is configured to create the set of time vectors for every combination of two acoustic sensors and correlate to actual hits and misses of the shots in the training data based on the randomized input data, which target calculation module (40) is configurable, with use of a set of training data comprising a starting point, a velocity, an impact angle and hit coordinates of the supersonic bullets, to - calculate a bullet impact and trajectory based on the input set oftime vectors, and - output the bullet impact and trajectory on a display (50) connected to the LOMAH system (100).

2. The three-dimensional LOMAH system (100) according to claim 1, wherein the target calculation module (40) is configurable to calculate the hit or miss in a 3-dimensional space, as defined in a standard right-handed Cartesian coordinate system, the velocity of the supersonic bullet and an impact angle (6)) in a x-direction and an impact angle (CD) in a y-direction based on the created set of time vectors.

3. The three-dimensional LOMAH system (100) according to claim 1 or 2, wherein the target calculation module (40) further is configurable to calculate an ambient temperature.

4. The three-dimensional LOMAH system (100) according to any one of claims 1 to 3, wherein the target calculation module (40) is configurable to calculate the impact angle (6)) in the x-direction in a range of i 30 degrees and the impact angle (CD) in the y-direction in a range of i 15 degrees.

5. The three-dimensional LOMAH system (100) according to any one of claims 1 to 4, wherein the sensor array comprises at least six acoustic sensors (6, 8, 10, 12, 16, 18) arranged in two rows.

6. The three-dimensional LOMAH system (100) according to any one of claims 1 to 5, wherein the sensor array comprises eight acoustic sensors (6, 8, 10, 12, 14, 16, 18, 20) arranged in three rows, a first row, a second row and a middle row arranged between the first row and the second row and wherein the middle row comprises two acoustic sensors (14, 20).

7. The three-dimensional LOMAH system (100) according to claim 6, wherein the two acoustic sensors (14, 20) in the middle row are arranged horizontally offset in relation to the acoustic sensors in the first row and the second FOW.

8. The three-dimensional LOMAH system (100) according to claim 7, wherein the two acoustic sensors (14, 20) of the middle row are arranged horizontally offset with a distance that is half the distance between the acoustic sensors (6, 8, 10, 12, 16, 18) in the first row and the second row.

9. The three-dimensional LOMAH system (100) according to any one of claims 1 to 8, wherein each sensor of the acoustic sensors (6, 8, 10, 12, 14, 16, 18, 20) in the sensor array is arranged with an angle (oi) in the range of 30-degrees in relation to the horizontal extension of the target platform (30).