| 摘要 |
System for ball possession detection, which contains a device (130) comprising means for detecting a magnetic field in a playing device (100) of a ball game, wherein the magnetic field is generated by at least one permanent magnetic (110) in the playing device, wherein the device can be associated to a player of a ball game and the means for magnetic field detection comprise a magnetic field sensor (210) and a control unit (220), and a method for ball possession detection, wherein the magnetic field sensor detects a magnetic field (310), the control means measures the magnetic field strength of the detected magnetic field (320) and detects (330) whether the magnetic field was caused by the at least one permanent magnet in the playing device and outputs information about the detection (350), as well as a ball (100) that contains at least one permanent magnet.
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