To provide a resonance body marker surveying device capable of securing a sufficient survey distance even to a small and inexpensive resonance body marker by enhancing the reception sensitiveness of a receiving antenna while suppressing direct coupling between a sending antenna and the receiving antenna.
In the resonance body marker survey device, sending signals of a predetermined frequency are intermittently sent via temporal changes of a magnetic field from the sending antenna 3 to the resonance body marker 1, response signals sent from the resonance body marker 1 in response to the sending signals are received by the receiving antenna 4 via the temporal changes of the magnetic field, and the resonance body marker 1 is searched on the basis of the received response signals. A coil diameter of the receiving antenna 4 is formed larger than a coil diameter of the sending antenna 3.
FURUKAWA YASUNARI
KAWAGUCHI KEIJI
KUBOTA KENJI
SEIKE MASAYUKI
TSUNASAKI MASARU
HATANAKA YOSHINORI
FUJI TECOM INC
MIYAKE KK