POSITION DETECTION SYSTEM, GUIDANCE SYSTEM, POSITION DETECTION METHOD, MEDICAL DEVICE, AND MEDICAL MAGNETIC-INDUCTION AND POSITION-DETECTION SYSTEM

摘要

A position detection system which allows a device to be free from adjustment for position detection and to be made more compact and less expensive includes the device (capsule endoscope 20) having a magnetic induction coil, a drive coil 51 for generating an alternating magnetic field, magnetic sensors 52, a frequency determining section 50B for a position calculating frequency, and a position analyzing unit 50A for calculating, at the position calculating frequency, the position or the orientation or both of the device 20 based on the difference between outputs from the magnetic sensors 52 when only the alternating magnetic field is applied and those when the alternating magnetic field and the induced magnetic field are applied; and a frequency range of the alternating magnetic field or an output frequency range of the magnetic field sensors or both are limited based on the position calculating frequency.