METHOD AND DEVICE FOR MEASURING CONDUCTIVITY INFORMATION AND CORRESPONDING MARKERS

摘要

The invention provides a marker (20). The marker (20) comprises a circuit (22) actuated by a first frequency into conductive status to track position information of an object (40). The circuit (22) of the marker (20) is in a non-conductive status based on the second frequency, and the first frequency is not in the range of the second frequency for measuring the conductivity information of the object (40). The invention further provides a device for measuring conductivity information of the object by generating the first frequency and the second frequency.