| 摘要 |
<p>The method involves producing an inductive/magnetic near field (9-12) with the help of markers (5-8). Field strength of the inductive/magnetic near field is measured by radio frequency identification (RFID) transponders (1, 2), which transmit data to a reader. Two markers are provided, whose field strengths are measured by the radio frequency identification transponder. A frequency range for the inductive near field of individual markers is selected within the range of less than 20 mega hertz.</p> |
