Optics: measuring and testing – By alignment in lateral direction – With light detector
Patent
1998-08-12
1999-11-23
Font, Frank G.
Optics: measuring and testing
By alignment in lateral direction
With light detector
G01B 1100
Patent
active
059910437
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a impact position marker of the type which is given in the preamble of claim 1. More particularly, the invention relates to a device for inputting, calculating and presenting the result of target shooting against moving targets with shotguns or similar weapons. Impact position marker is intended for ordinary or simulated shooting from a fire-arm against a moving target and comprises a sensor part with an estimating unit for the actual position of the target in relation to the fire-arm, and a firing detector.
TECHNICAL FIELD
During shotgun shooting against clay pigeons, e.g. skeet and trap shooting, a hit is indicated by the clay pigeon being seen to break up. Even if it is possible to some extent to judge the quality of the hit from how powerfully the clay pigeon is fragmented, it is difficult with bad hits and with misses to get an exact idea of the impact position, i.e. the angular distance between the target and the charge of shot and whether the shot passed over, under, to the left or to the right of the target.
The possibilities of training for shotgun shooting are limited by the availability of shooting ranges which for environmental reasons are placed away from settlements. Other restrictions also sometimes limit the possibilities for training, for example, regulations about permitted shooting times.
These said conditions mean that there is a need for, on the one hand, an aid which shows the position of impact during (conventional) shotgun shooting, on the other hand, a system for training in shotgun shooting under simulated conditions, i.e. without live ammunition needing to be discharged.
DESCRIPTION OF RELATED TECHNOLOGIES
A number of systems for simulating shooting have been suggested in order to improve the possibilities of practising shooting with small arms, one of which is described in U.S. Pat. No. 5,194,006. This system permits shooting training in a simulator with small arms where an image of the target is projected onto a projection screen and the shooter fires towards the projected target with a gun simulator. The system calculates the impact position with reference taken to the angular speed of the target and a fictive distance. The system cannot be used for practice shooting against real targets.
A number of known systems, amongst which is the one described in U.S. Pat. No. 3,798,795, are known for estimating the results of shooting when shooting against true moving targets with ballistic projectiles. A necessary part of systems of this type is a distance measuring function. In this system a (TV) camera image is used for inputting the vertical and horizontal position of the target while the distance is determined with the help of measuring the delay time interval for a radio signal which is echoed by a transponder on the target. This method for measuring the distance is not suitable for clay pigeon shooting.
In the same way as with the evaluation afterwards of a shot which has been discharged, a fire control system which, before the shot is fired, must determine a suitable direction of aim, must determine the distance to the target. In U.S. Pat. No. 4,922,801 a fire control system for a weapon with a barrel directed by a shooter is described which assists the shooter during aiming by calculating the position for a "future" target. The position for the future target is calculated with reference to the angular speed of the target and the distance, and the delay time interval for the projectile, and is presented in the form of an aiming point which the shooter shall aim towards in order to hit. The distance to the target is calculated from the apparent size of the target on a TV image. The object of this system is fire control, not the evaluation of the result of shooting.
The English company Powercom (UK) Ltd sells a system called Lasersport Clay Pigeon Shooting System, which can be used for simulated shooting against specially manufactured clay pigeons. In order to detect hits, respectively misses, an infrared light beam with a dimension which cor
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Ahlen Hans
Andersson Tommy
Anderson Tommy
Font Frank G.
Stafira Michael P.
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