Double piston rod
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United States of America Patent
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Jan 29, 2013
Grant Date -
Mar 17, 2011
app pub date -
Aug 18, 2008
filing date -
Aug 16, 2007
priority date (Note) -
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Abstract
A distance measuring apparatus for detecting the position of a reflection body in a line structure is provided that includes a sensor device, which has at least one antenna for feeding a transmission signal as an electromagnetic wave into the line structure and for receiving the electromagnetic wave reflected on the reflection body. The sensor device also includes evaluation electronics which are configured to determine the position of the reflection body from the phase difference between the transmitted and the received wave.
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