发明名称 |
Eddy current detection and compensation |
摘要 |
A method for detecting the presence of conductive objects, the method includes determining a characteristic frequency function of an undisturbed magnetic tracking system (14). The method includes measuring a disturbed real-time frequency function, and calculating real and imaginary components of the position indication signal using a chi-squared minimization of the disturbed frequency function to the undisturbed frequency function. The method also includes calculating a chi-squared value based on the characteristic frequency function und the disturbed frequency function, and monitoring the chi-squared value to detect changes indicating the presence of a conductive object. |
申请公布号 |
EP2052681(B1) |
申请公布日期 |
2015.02.25 |
申请号 |
EP20090153061 |
申请日期 |
2004.04.19 |
申请人 |
NORTHERN DIGITAL INC. |
发明人 |
KIRSCH, STEFAN R.;NIEMINEN, JOHN M. |
分类号 |
G01N27/90;A61B5/06;G01R33/20;G01R33/565 |
主分类号 |
G01N27/90 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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