| 摘要 |
<p>A sensor for locating metal objects and an associated method comprise a plurality of transmitting coils (2.1, 2.2) and a receiving coil (1.9) which are inductively coupled to one another and are arranged in a partially overlapping manner for interaction decoupling, wherein a point of optimum cancellation of the interaction can be reached. A simple and effective sensor is provided as a result of the fact that, with identical energization, the transmitting coils (2.1, 2.2) which are energized by the sensor electronics have an effect on the at least one receiving coil (1.9) in which a local point of optimum cancellation is produced, which point moves in a first direction when a first transmitting coil (2.1) is energized, whereas said point moves in a further direction when a further transmitting coil (2.2) is energized, and as a result of the fact that a control circuit is provided for the purpose of controlling the currents in the transmitting coils and results in a shift in the local point of optimum cancellation that cancels the received signal.</p> |
