Patent ID: 9513095
Filing Date: 2016-12-06
CPC Classification: F42B,F42C,G01P

Claim Text:
1. A system for determining parameters of the motion of a projectile as it exits the muzzle of a gun barrel, wherein said system comprises: a projectile; p magnetic sensors, p≧1, located within said projectile, each of which is displaced from the longitudinal axis of said projectile by a distance r a microprocessor located within said projectile, said microprocessor in electrical communication with said at least one magnetic sensor, said microprocessor comprising a timing circuit, a logic circuit, and data storage means, and being programmed to measure the relative timing of signals received from said at least one magnetic sensor and to calculate at least one parameter related to the motion of said projectile; a gun barrel from which said projectile is expelled, said gun barrel comprising a muzzle and a mouth; a sleeve, constructed of non-magnetic material, extending from the mouth of said gun barrel and disposed such that the longitudinal axis of said sleeve is coincident with the longitudinal axis of said gun barrel; a first horizontal ring, constructed of magnetic material, disposed about the circumference of said sleeve such that the plane defined by the ring is perpendicular to the longitudinal axis of said sleeve and located beyond the mouth of said gun barrel; a second horizontal ring, constructed of magnetic material, disposed about the circumference of said sleeve such that the plane defined by the ring is perpendicular to the longitudinal axis of said sleeve and displaced from said first horizontal ring by a distance D a plurality n of oblique rings disposed about the circumference of said sleeve, said oblique rings characterized by: