Method and apparatus for distance based detection of wear and the like in joints
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United States of America Patent
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Jun 3, 2003
Grant Date -
Aug 1, 2002
app pub date -
Jan 31, 2001
filing date -
Nov 18, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A distance measurement system, comprising at least one resonant circuit, at least one magnetic element with predetermined magnetic properties, a transmitter operable to transmit an electromagnetic pulse, a receiver operable to detect oscillations emitted by said resonant circuit in response to said electromagnetic pulse, and an analyzer operable to analyze an amplitude envelope property of said oscillations, to thereby determine a distance between the resonant circuit and the magnetic element.
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