| 摘要 |
A projectile target system I comprises a target 3 having a substantially sealed chamber 7 having a front face 4 and a spaced apart rear face 5 with an enclosing side wall (frame) 8 disposed intermediate. The front 4 and rear 5 faces are formed by membranes configured to allow a projectile 2 to pass therethrough and to substantially seal to maintain said substantially seal chamber 7. The system 1 has at least four spaced apart pressure wave sensors 15 disposed within said chamber 7. The sensors 15 are configured to detect pressure waves created by said projectile 2. A target controller 16 is in communication with said sensors 15 and configured to receive signals therefrom indicative of the pressure sensed by said sensors 15 . The time difference between receipt by said controller 16 of signals from said sensors 15 and discriminating with respect to sensor position to determine an impact point on said front face 4 of said target 3 such that said controller 16 provides an output indicative of said projectile impact point. Preferably, each target 3 has between four to ten said pressure sensors, and preferably seven to ten sensors said pressure sensors. The target target controller 16 is in communication with a shooter terminal disposed adjacent a shooter firing said projectile to display information indicative of the location of said projectile pierces said front face of said target. Further, the target controller 16 is in wireless communication with a range computer or computer network and/or a broadcast computer or communications network to provide digitised information indicative of the position on said front face said projectile pierces. Preferably, the target controller 16 organises the input from said sensors to calculate all possible three-sensor combinations of said sensors triggered such that a centre calculation is applied to each three-sensor combination to provide a hyperbolic curve thereof such that the intersection of each curve for each three-sensor combination defines a location of said front face said projectile passes therethrough. Further, the target controller 16 is movable clear of the target 3. Also, a system for detecting the muzzle blast of a firearm includes an accelerometer mounted to said firearm or the shoulder, arm or wrist of a shooter. 5419A-AU ails w in a0 a U ifl V -, up Lu It a *1~ 'C V a a 0' It = Lu a a 4- (1 L..J ~. = .- CA a Lu t -~ a -~ 'Jo ~7CXJ 0 ~ ri-" U a by aC ~Z4 t# |
