Apparatus and methods for detection of a shot firing event
A method of determining an aim point of a firearm or simulated firearm at a time of firing by continuously pulsing a laser coaxially aligned with a barrel of the firearm or simulated firearm. The aim point is then continuously detected by a camera system observing the target. A shot firing event is detected and the last detected laser pulse location on the target prior to the shot firing event is determined. The aim point of the firearm or simulated firearm at the time of firing is extrapolated from the last detected laser pulse location and at least one laser pulse location prior to the last laser pulse location.
1. A method of determining an aim point of a firearm or simulated firearm at a time of firing comprising:
continuously pulsing a laser at a frequency greater than 1 Hz wherein the laser is mounted to the firearm or simulated firearm and is coaxially aligned with a barrel of the firearm or simulated firearm;
continuously detecting a laser pulse location from the laser on a target;
detecting a shot firing event with a sensor mounted on the firearm or simulated firearm;
determining a last detected laser pulse location on the target prior to the shot firing event;
extrapolating the aim point of the firearm or simulated firearm at the time of firing from the last detected laser pulse location and a plurality of laser pulse locations prior to the last laser pulse location.
2. The method of claim 1 , further comprising factoring into the extrapolating step at least one laser pulse location on the target after the shot firing event.
3. The method of claim 2 , wherein the at least one location after the shot firing event is reduced in weight.
4. The method of claim 2 , wherein a plurality of laser pulse locations on the target after the shot firing event are used.
5. The method of claim 1 , wherein the sensor is an accelerometer.
6. The method of claim 1 , wherein the sensor is an ultrasonic sensor.
7. The method of claim 1 , wherein the frequency is greater than 10 Hz.
8. The method of claim 1 , wherein the frequency is greater than 20 Hz.
9. The method of claim 1 , wherein the frequency is divisible without remainder into a frame rate of a detection camera that is continuously detecting the laser pulse location from the laser on the target.
10. The method of claim 1 , wherein the frequency and timing of the continuously pulsing laser is adjusted so that the laser pulse location from the laser on the target occurs when the shutter of a detection camera is open.
11. The method of claim 10 , wherein multiple firearms or simulated firearms are each have a laser mounted to the firearm or simulated firearm that is bore sighted with a barrel of the firearm or simulated firearm and each laser is continuously pulsing in a repeated sequence so that each laser pulse location from a laser on a target occurs when the shutter of a detection camera is open.
12. The method of claim 10 or 11 wherein the frame rate of the detection camera is 60 Hz.
13. A method of determining an aim point of a firearm or simulated firearm at a time of firing comprising:
pulsing a laser at a frequency at 10 Hz or greater wherein the laser is bore sighted with a barrel of the firearm or simulated firearm;
detecting a laser pulse location from the laser on a target;
detecting a shot firing event;
determining a last detected laser pulse location on the target prior to the shot firing event;
extrapolating the aim point of the firearm or simulated firearm at the time of firing from the last detected laser pulse location and at least one laser pulse location prior to the last laser pulse location.
14. The method of claim 13 , wherein the detecting step is performed by at least one camera observing a target.
15. The method of claim 13 , further comprising factoring into the extrapolating step at least one laser pulse location after the shot firing event.
16. The method of claim 15 , wherein the at least one location after the shot firing event is reduced in weight.
17. The method of claim 13 , wherein the detecting step is performed by a sensor coupled to the firearm or simulated firearm.
18. The method of claim 17 , wherein the sensor is selected from the group consisting of an ultrasonic sensor and an accelerometer.
19. The method of claim 14 , wherein the pulsing laser is synchronized with a shutter of the camera so that the laser pulse location occurs when the shutter is open.
20. The method of claim 13 , wherein multiple firearms or simulated firearms each have a laser bore sighted with a barrel of the firearm or simulated firearm and each laser is pulsing in a repeated sequence so that each laser pulse location from a laser on a target occurs when the shutter of a detection camera is open and only one laser pulse appears on the target at a time.