Acoustic absolute position encoder and method
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United States of America Patent
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Sep 1, 2015
Grant Date -
Dec 5, 2013
app pub date -
May 29, 2012
filing date -
May 29, 2012
priority date (Note) -
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Abstract
The present invention teaches acoustic absolute position encoders and methods for deploying the same. The encoder has a moving member with a mechanical contacting portion, and a stationary member associated with the moving member. Reed elements are mounted on the stationary member such that they are mechanically engaged by the contacting portion of the moving member as the latter moves linearly or rotates. The reed elements generate sound tones in response to transient contact with the contacting portion. A receiver receives the tones and an acoustic processing circuit determines the absolute position of the moving member based on the sound tones.
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