Method and equipment for the control of aiming and firing at a real target

• US 4,577,962 A
• Filed: 10/06/1983
• Issued: 03/25/1986
• Est. Priority Date: 03/07/1980
• Status: Expired due to Term

• Current Assignee: Giravions Dorand
• Original Assignee: Giravions Dorand
• Inventors: Saunier, Christian, de Guillenschmidt, Pierre, Goujon, Michel, Hubert, Jacques
• Primary Examiner(s): BENTLEY, STEPHEN
• Application Number:
  US06/539,694
• Time in Patent Office: 901 Days
• Field of Search: 89/41 L, 235/411, 235/412, 235/413, 235/414, 235/415, 235/416, 273/310, 273/311, 273/312, 273/359, 273/360, 273/371, 343/7 G, 343/12 MD, 356/5, 356/152, 434/19, 434/21, 434/22
• US Class Current: 356/5.05
• CPC Class Codes: F41G 3/26 Teaching or practice apparatus for gun-aiming or gun-laying shooting games A63F9/02; light- or radiation-emitting guns F41A33/02; targets therefor F41J; responders, transponders for radar, sonar, lidar G01S13/767, G01S15/74, G01S17/74
• CPC Class Codes: F41G 3/265 with means for selecting or varying the shape or the direction of the emitted beam
• CPC Class Codes: F41G 3/2688 using target range measurement, e.g. with a laser rangefinder
• CPC Class Codes: F41G 5/08 Ground-based tracking-systems for aerial targets
• CPC Class Codes: G01S 17/66 Tracking systems using electromagnetic waves other than radio waves

Abstract

A firing weapon is associated with a laser radiation source mounted in proximity to the weapon and also with a detector which is sensitive to the laser radiation. The orientation of the radiation is adjusted independently of the aiming of the weapon in order to carry out continuous detection of the target as a result of detection of radiation by the detector after reflection from the target. The orientation and the time of transit of radiation between source and target are utilized in order to obtain target data relating to position in elevation and in azimuth as well as distance of the target. The data are processed in order to orient a real shot or in order to compare the data quantitatively with the position of a simulated projectile which follows a fictitious trajectory.

Claims

1. A method of fire control for firing at a real target comprising the steps of:

associating a firing weapon with a laser radiation source and a detector sensitive to said radiation mounted in proximity to said weapon, automatically adjusting the orientation of the radiation from said source independently of the aiming of the weapon for continuous detection of the target as a result of detection of radiation by said detector after reflection from the target, determining said orientation and the time of transit of radiation between source and target, obtaining from said orientation and time of transit target data relating to the target position in elevation and azimuth, and to the target distance, and evaluating the result of a simulated shot by comparing said data quantitatively with the position of a simulated projectile along an expected trajectory, wherein said adjusting step comprises carrying out a first field scan by the radiation until detection of said radiation after reflection from the target, then tracking the target by a second field scan wherein the orientation of the radiation is maintained centered on the target during all target displacements.

2. A method according to claim 1, wherein said target data including the data relating to the target position in elevation and in azimuth and the data relating to the target distance, are determined at least at two different instants.

3. A fire control system for firing at a real target, comprising a source of laser radiation and a detector sensitive to said radiation, both mounted in proximity to a firing weapon, means for automatically adjusting the orientation of the radiation independently of aiming of the weapon for continuous detection of said radiation by said detector after reflection from the target, means whereby target data relating to the position in elevation and in azimuth and to the distance of the target, are determined from said orientation of the radiation and from the time of travel of the radiation between the source and the target, means for determining at at least two different times a theoretical simulated-shot trajectory, means for comparing said target data at said times with the position and distance of a simulated projectile on said trajectory and evaluating therefrom the result of said simulated shot, including means for automatically carrying out a first field scan by the laser radiation until detection of said radiation after reflection from the target and for subsequently tracking the target in a second field scan by maintaining the orientation of the radiation centered on the target in all target displacements, and means for continuously defining said orientation with respect to a reference direction in addition to the distance of the targets in aid orientation.

4. A fire-control system according to claim 3, wherein said system is provided on the target with at least one detector which is sensitive to said radiation and with means for utilizing data transmitted in coded form by said beam.

5. A fire-control system according to claim 3, wherein said system comprises at least one reflector which is sensitive to said radiation on the target.

6. A fire-control system according to claim 3. wherein the scanning means comprise mirrors interposed on the path of the laser radiation emitted by a stationary source on the sighting unit, said mirrors being movable in order to modify the orientation of the beam transmitted in the direction of the target.

7. A system according to claim 3 wherein said target data further comprises information with respect to the velocity of the target.

8. A method of fire control for firing at a real target comprising the steps of:

associating a firing weapon with a laser radiation source and a detector sensitive to said radiation mounted in proximity to said weapon, automatically adjusting the orientation of the radiation from said source independently of the aiming of the weapon for continuous detection of the target as a result of detection of radiation by said detector after reflection from the target, determining said orientation and the time of transit of radiation between the source and the target, obtaining from said orientation and time of transit target data relating to the target position in elevation and azimuth and to the target distance, and evaluating the result of a simulated shot by comparing said data quantitatively with the position of a simulated projectile along an expected trajectory wherein said adjusting step comprises carrying out a first field scan by the radiation until detection of said radiation after reflection from the target, then tracking the target by a second field scan wherein the orientation of the radiation is maintained on the target during all target displacements, and wherein said first field scan is defined as a field in the vicinity of the position of a simulated projectile at each point in its expected trajectory and wherein tracking of a target detected in the field is abandoned when the target passes out of the field or when the projectile passes beyond the target without a direct hit.