| 摘要 |
The invention relates to an approach warning system for detecting when a person approaches an object which has a metal outer structure at least in regions. The system is formed with at least a first near-field device which is associated with the object and a second near-field device which is associated with the person, wherein the first and the second near-field device form a transmission link for an electric near field, and with a warning device which outputs an approach warning signal when a person with the second near-field device enters a detection region in which a transmission of the near field via the transmission link takes place, wherein the first near-field device is connected, for the purpose of coupling to the near field, firstly to a stray field electrode and secondly to the metal outer structure of the object, so that the outer structure forms a counter-electrode for the stray field electrode, and wherein the near-field devices and the electrodes thereof are configured such that the detection region at least approximately encloses the entire outer structure of the object.
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