| 摘要 |
The invention relates to a globe comprising a contactless and magnetically held globe sphere. Said globe comprises an electric control device for an electromagnet, which is connected on the inlet side thereof to a magnet field sensor, especially a hall-probe, and which controls the position of the glove sphere by switching the electromagnet on an doff or by controlling the current passing through the electromagnet according to the output signals of the magnet field sensor. A microcomputer, which is supplied with the output signal of the magnet field sensor, is provided in order to control a non-oscillating position of the globe sphere. The microcomputer comprises at least one memory-counter which is used to detect on/off positions and /or a device which is used to detect a current passing through the electromagnet or the voltage applied to the electromagnet during at lest one defined period of time. The globe also comprises a switching or controlling device which influences the ration of on and off states of the electromagnets and/or the current flowing through the electromagnet/voltage applied to the electromagnet according to the temporal course of the on/off position detected by the microcomputer and/or measured current/voltage.
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