| 摘要 |
<p>A safety system for an inductive power transfer system for inductively supply power to a vehicle, comprises at least one primary winding in a charging surface of a route (e.g. road or railway) for the vehicle. The primary winding generates an electromagnetic primary field for the inductive power transfer. The safety system comprises at least one capacitive sensing system 1 comprising multiple detection capacitors wherein the multiple detection capacitors are arranged in an array structure, wherein the array structure at least partially covers the charging surface. The capacitors may comprise first electrodes 2 and second electrodes 3 and an evaluation unit 5 may be provided to determine a capacitance provided in between the first and second electrode, indicating that an object or foreign body 4 is present. The first and second electrodes may comprise partial electrodes arranged and connected such that a conductor path is provided which forms at least two counter oriented conductor loops. An additional compensating conductor loop may be provided. The electrodes or partial electrodes may be have a single or double comb-like structure. A cancellation field may be generated by a primary field cancellation means if a foreign object has been detected. The safety system may comprise an acoustic sensor.</p> |
