Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Amfitech Aps

Goalref Aps

Fraunhofer-Ges. Zur Förderung Der Angewandten Forschung E.v.

Jørn Eskildsen

Tobias Draeger

Markus Hartmann

Rafael Psiuk

Lau Kofoed Kierstein

Electromagnetic tracking systems and methods for automatically providing the required additional information needed to identify the orientation of a sensor are disclosed. The tracking systems are configured to carry out a digital modulation process to determine one or more parameters needed for calibration and to determine if the carrier wave and the modulated signal are in-phase or 180° out-of-phase at time T=0, thereby determining the operational sign of the carrier wave and thus the orientation of the one or more sensors. In some embodiments, at least one offset coil is arranged to generate an additional magnetic field, and the tracking system may be calibrated on the basis of the additional magnetic field.

Calibration method and device for carrying it out

A method for determining information on a position of an object, the object emitting a magnetic field in response to an exciting electromagnetic field comprises monitoring () a receive signal of at least one loop antenna, the receive signal having a contribution caused by the emitted magnetic field; determining a first quadrature component () of the receive signal; and determining the information on the position of the object () based on the first quadrature component.

Method, apparatus and computer program for determining information on a position of an object, the object emitting a magnetic field

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.

Goal detector for detection of an object passing a goal plane

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.

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Tørring, Denmark

Jørn Eskildsen