System and method for detecting whether an object or person crosses a limit marked by a magnetic field
First Claim
1. A device for detecting whether an object or person crosses a limit marked by a magnetic alternating field, the device comprising:
- a first magnetic field sensor that detects a first magnetic field component of the magnetic alternating field and delivers an associated magnetic field sensor signal;
a second magnetic field sensor that detects a second magnetic field component of the magnetic alternating field; and
an evaluator configured to deliver information that indicates that the object or person has crossed the marked limit in response to a change in a phase relation between the magnetic field sensor signal and a reference signal based on the detected second magnetic field component, wherein the evaluator prevents provision of the information that indicates that the object or the person has crossed the marked limit if a change in the phase relation between the magnetic field sensor signal and the reference signal is effected on the basis of a rotation of the device.
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Accused Products
Abstract
A device for recognizing when an object or a person crosses a threshold that is marked by a magnetic field comprises a first magnetic field sensor that is designed to detect a first magnetic field component of the magnetic alternating field and to deliver an associated magnetic field sensor signal. The device comprises a second magnetic field sensor that is designed to detect a second magnetic field component of the alternating magnetic field. The device also comprises an evaluator that is designed to deliver information in response to a change in a phase relationship between the magnetic field sensor signal delivered by the first magnetic field sensor and a reference signal based on the detection of the second magnetic field component by the second magnetic field sensor, said information indicating that the object or person has crossed the marked threshold.
44 Citations
20 Claims
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1. A device for detecting whether an object or person crosses a limit marked by a magnetic alternating field, the device comprising:
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a first magnetic field sensor that detects a first magnetic field component of the magnetic alternating field and delivers an associated magnetic field sensor signal; a second magnetic field sensor that detects a second magnetic field component of the magnetic alternating field; and an evaluator configured to deliver information that indicates that the object or person has crossed the marked limit in response to a change in a phase relation between the magnetic field sensor signal and a reference signal based on the detected second magnetic field component, wherein the evaluator prevents provision of the information that indicates that the object or the person has crossed the marked limit if a change in the phase relation between the magnetic field sensor signal and the reference signal is effected on the basis of a rotation of the device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for detecting if playing equipment crosses a limit marked by a magnetic alternating field, the method comprising:
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detecting a first magnetic field component of the magnetic alternating field; delivering a signal based on the detection of the first magnetic field component; detecting a second magnetic field component of the magnetic alternating field; and delivering information that indicates that the playing equipment has crossed the marked limit in response to a change in a phase relation between the signal delivered on the basis of detection of the first magnetic field component, and a signal based on the detection of the second magnetic field component, the method further comprising; detecting whether the playing equipment crosses a first limit marked by a magnetic field or whether the playing equipment crosses a second limit marked by a magnetic field, the first limit being marked by a first conductor part which is subjected to a flow of current along a goal line of a goal, and the second limit being marked by a second conductor part which is subjected to a flow of current along a crossbar of the goal, and signaling that a goal event occurs, in response to detection that the playing equipment has crossed the first limit or the second limit, unless information is present which indicates that the playing equipment crosses a third limit marked by a magnetic field after crossing the second limit, the third limit being marked by a third conductor part which is subjected to a flow of current and is disposed such that the third limit is crossed by playing equipment which moves beyond the goal above the crossbar. - View Dependent Claims (19)
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20. A system for detecting if an object or person crosses a limit marked by a magnetic alternating field, the system comprising:
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an alternating field source which is designed to produce a magnetic alternating field along a limit to be marked; and a device comprising; a first magnetic field sensor that detects a first magnetic field component of the magnetic alternating field and delivers an associated magnetic field sensor signal; a second magnetic field sensor that detects a second magnetic field component of the magnetic alternating field; and an evaluator configured to deliver information that indicates that the object or person has crossed the marked limit in response to a change in a phase relation between the magnetic field sensor signal and a reference signal based on the detected second magnetic field component, wherein the evaluator prevents provision of information that indicates that the object or the person has crossed the marked limit if a change in the phase relation between the magnetic field sensor signal and the reference signal is effected on the basis of a rotation of the device.
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Specification