Goal detector for detection of an object passing a goal plane
First Claim
1. A system comprisinga movable object,radio wave emitter means arranged in the movable object,stationary exciter means arranged for exciting said radio wave emitter means,stationary receiver means for receiving radio waves from the radio wave emitter means and for providing an output accordingly,a plurality of substantially closed first antenna circuits arranged along a periphery of a flat target plane, each of the plurality of substantially closed first antenna circuit comprising two substantially parallel conductors extending substantially parallel to said periphery of the target plane, one of the two substantially parallel conductors being arranged on a first side of the flat target plane and the other of the two conductors being arranged on a second opposing side of the flat target plane, each of the two substantially parallel conductors being arranged a substantially similar distance in a direction perpendicularly to the flat target plane, wherein said plurality of first antenna circuits constitutes one of said stationary exciter means and said stationary receiver means, anddata processing means to receive and process said output together with a predetermined set of conditions and providing a resulting output if the set of conditions are fulfilled so as to determine whether the movable object passes the flat target plane.
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Accused Products
Abstract
A system is disclosed for detection of whether a movable object, such as a sports object, e.g. a football or an ice hockey puck, has passed goal plane. It is known to encircle the goal plane with conductors to produce an electromagnetic field to excite signal emitter means in the movable object, alternatively detect the signal emitted by the emitter means. With the present invention these circuits are sectioned into a plurality of separate circuits, which provides an improved spatial resolution of the system in particularly when the movable object is close to the conductors.
25 Citations
25 Claims
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1. A system comprising
a movable object, radio wave emitter means arranged in the movable object, stationary exciter means arranged for exciting said radio wave emitter means, stationary receiver means for receiving radio waves from the radio wave emitter means and for providing an output accordingly, a plurality of substantially closed first antenna circuits arranged along a periphery of a flat target plane, each of the plurality of substantially closed first antenna circuit comprising two substantially parallel conductors extending substantially parallel to said periphery of the target plane, one of the two substantially parallel conductors being arranged on a first side of the flat target plane and the other of the two conductors being arranged on a second opposing side of the flat target plane, each of the two substantially parallel conductors being arranged a substantially similar distance in a direction perpendicularly to the flat target plane, wherein said plurality of first antenna circuits constitutes one of said stationary exciter means and said stationary receiver means, and data processing means to receive and process said output together with a predetermined set of conditions and providing a resulting output if the set of conditions are fulfilled so as to determine whether the movable object passes the flat target plane.
Specification