METHOD FOR DETECTION AND COMPENSATION OF EDDY CURRENTS

摘要

A method and system for detecting the presence of conductive objects are provided. The method includes determining a characteristic frequency function of an undisturbed magnetic tracking system and measuring a disturbed real-time frequency function. Real and imaginary components of a position indication signal are calculated using a chi-squared minimization of the disturbed frequency function to the undisturbed frequency function. A chi-squared value based on the characteristic frequency function and the disturbed frequency function is calculated and the chi--squared value is monitored to detect changes indicating the presence of a conductive object.