초록 ▼

An impact location determination system (20) includes a damage resistant strike plate (22) having a planar surface (26) adapted to be impacted by a projectile (28). Pressure sensor assemblies (55) are embedded in the strike plate (22) and detect a pressure disturbance event outwardly propagating as

An impact location determination system (20) includes a damage resistant strike plate (22) having a planar surface (26) adapted to be impacted by a projectile (28). Pressure sensor assemblies (55) are embedded in the strike plate (22) and detect a pressure disturbance event outwardly propagating as a wave (36) from an impact location (34). The wave (36) propagates through the strike plate (22) at a propagation velocity that is slower than the speed of sound for the strike plate (22). A signal processing circuit (32) measures time difference of arrival figures (196 and 198) between pairs of pressure sensors (140 and 142) and determines the impact location (34) in response to the time difference of arrival figures (196 and 198) and the velocity of the wave (36) through the strike plate (22).

대표청구항 ▼

1. A system for determining the precise location of an impact point of a projectile on the surface of a strike plate with the use of a plurality of pressure sensor pairs, an electronic signal processing circuit comprising:a) said strike plate having predetermined shape and size sufficient to accommo

1. A system for determining the precise location of an impact point of a projectile on the surface of a strike plate with the use of a plurality of pressure sensor pairs, an electronic signal processing circuit comprising:a) said strike plate having predetermined shape and size sufficient to accommodate use as a projectile target; b) said strike plate having two substantially flat planar surfaces, a front side planar surface and a rear side planar surface, said surfaces being substantially parallel to each other; c) means to substantially prevent penetration or damage of said front planar surface of said strike plate by said projectile; d) means to substantially prevent penetration or damage of said front planar surface of said strike plate by said projectile or multitude of subsequent projectiles at the same point of impact on said front planar surface; e) a pressure sensor providing means of isolating a pressure disturbance event selected from a plurality of pressure disturbance events urged from any direction within said strike plate when said projectile impacts said strike plate, and said pressure disturbance event having a speed other than the speed of sound; f) a pressure sensor pair comprised of two said pressure sensors having a predetermined distance between said pressure sensors; g) a plurality of said pressure sensor pairs; h) a means for mounting in predetermined locations said plurality of said pressure sensor pairs with respect to said rear planar surface; i) an electronic signal processing circuit in communication with said plurality of pressure sensor pairs thereby providing a means for determining a multiple of time difference of arrivals of said pressure disturbance event among said plurality of pressure sensor pairs; j) a means of converting said multiple of time difference of arrivals into a calculated impact point, said calculated impact point being located within a predetermined tolerance of said impact point of said projectile on said front planar surface; k) a means for converting said calculated impact point into an indicium; whereby said system will locate the precise impact point of said projectile on said strike plate and generate indicium relative to said precise impact point, whereby one or a plurality of humans can discern the precise location of an impact point of a projectile on the surface of a strike plate, whereby one or a plurality or humans can discern the precise locations of a plurality of impact points of a plurality of projectiles on the surface of a strike plate even if such impact points overlay.