Resistive matrix targeting system
OwnerRobert B. Hodgeinventor
Life of this patent
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Abstract
The invention is a target system capable of determining projectile entrance by detecting loss resistors formed by a graphic colloidal suspension coating of conductive ink placed beneath a graphic target. The target is a low cost sheet of flexible paper positioned by use of a tractor feeder. Actual loss of resistors is interpreted by a microprocessor running a grid simulation program. Upon loss of any one particular resistor, the microprocessor interprets the target to determine what resistors remain thereby providing a history of projectile penetration. The results of the target penetration can be viewed from a remote video display terminal.
Claims20
A location-determination apparatus comprising:
- a surface having a matrix grid formed on at least one surface face thereof;
- said matrix grid being formed from a plurality of parallel, spaced-apart horizontal and vertical conductive ink-lines, said horizontal and vertical ink-lines overlapping at nodes;
- each said horizontal and vertical ink-line comprising a plurality of sections, at least some of said sections being bounded by two said nodes, and at least one said section being bounded by one said node for providing a sense-parameter;
- each said node normally having an electrical parametric value associated therewith;
- power means for providing current through said horizontal and vertical ink-lines in order to generate said electrical parametric value associated with each said node;
- and
- a computer simulation means operatively associated with said matrix grid for determination of the electrical parametric value at each said node, and for the detection of a loss of one or more said nodes by comparing said electrical parametric values of said nodes to said computer simulation.
A method of detection of a location comprising the steps of:
- (a) forming a resistive matrix on a surface, said matrix formed from a plurality of spaced-apart first conducting lines and a plurality of spaced-apart second conducting lines intersecting with the first conducting lines to form a plurality of nodes;
- (b) applying a voltage to the resistive matrix;
- (c) measuring an operating parameter of at least some resistors in the matrix;
- (d) continually scanning the grid and determining the values of said parameter of said some resistors;
- (e) comparing each said scanning against stored results for detection of a matrix change;
- and
- (f) analyzing the matrix change by checking combinations of a possible resistor or resistors that have been removed, until the closest simulated value is determined, whereby, upon calculating which resistor or resistors have been removed, a precise location may be determined.
A system for precisely determining the location within a surface, comprising:
- a surface having a resistive matrix pattern formed of a plurality of first electrically-conducting lines extending in a first direction, and a plurality of second electrically-conducting lines extending in a second direction, said plurality of first and second conducting lines overlapping at intersections and forming nodes thereat, said matrix pattern further comprising a first group of sense-resistor means and a second group of main resistor means interconnected by said plurality of first and second conducting lines;
- means operatively associated with said matrix pattern for generating parametric values of said sense-resistor means;
- and
- computer means for determining the loss of a main resistor means associated with a respective said node by comparison to a computer simulation.
A method of determining the loss of a electrical element, which electrical element is part of an array of electrical elements, by use of a successive approximation simulation method, comprising:
- (a) generating a matrix-array model of said array of electrical elements by means of a computer program means;
- (b) predicting which electrical element of said array is missing after having received sensing information indicating that an electrical element has been eliminated from said array, by means of a computer program means;
- (c) said step (b) comprising modifying the matrix-array model of said step (a) by said computer program means;
- (d) running simulations based on the modified matrix-array of said step (c);
- (e) comparing the results of said step (d) with the actual sensed information of said array;
- and
- (f) repeating said steps (d) and (e) a plurality of times until the results of said step (d) match the actual sensed information of said array.
Dependencies are inferred from the claim text.