Distance measuring device and method for determining a distance
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United States of America Patent
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Sep 3, 2002
Grant Date -
N/A
app pub date -
Jun 13, 2000
filing date -
Dec 15, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A distance measuring device is capable of measuring a distance to a piston with a cylinder both discretely and continuously. The distance measuring device includes a coupling probe located axially symmetrically with respect to a piston rod within the cylinder. The coupling probe transmits a continuous wave electromagnetic signal into the cylinder and detects its reflection to measure the distance to the piston while the piston is moving.
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