Acquistion of a projectile trajectory past a moving target

Details Acquistion of a projectile trajectory past a moving target Acquistion of a projectile trajectory past a moving target

1987-02-09

1989-02-14

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With time interval measuring means

434 1, 273372, 273360, 244 1TD, 367906, G01S 518, F41J 512

Patent

active

048051594

ABSTRACT:
The minimum distance between a passing projectile and a training (dummy) target is ascertained by means of four shock wave responsive transducers in the target, two of which are aligned with the target's propagation and the transit time differential of receiving the shock wave from the projectile as well as measured distances to the projectile's trajectory are used to establish a set of possible projectile trajectories, one of them being the real one; all of them being arranged in rotational symmetry to the line established by the two transducers. This information suffices already to determine the minimum distance of fly by. A third transducer is used in relation to one of the two others to establish a second transit time difference by means of which the number of possible trajectories is narrowed to two being in mirror symmetrical relation to the plane established by the three transducers; the fourth transducer is used for detection of another transit time differential vis-a-vis any of the three others to resolve the remaining ambiguity concerning identification of the actual fly by trajectory.

REFERENCES:
patent: 4323993 (1982-04-01), Soderblom et al.
patent: 4659034 (1987-04-01), Diekmann

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