Pulser with double-bearing position encoder for non-invasive physiological monitoring
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United States of America Patent
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Feb 13, 2018
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Jul 17, 2014
filing date -
Jul 17, 2013
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Abstract
A double-bearing position encoder has an axle stabilized within a housing via two bearings disposed on opposite walls of the housing. The axle is in communications with a rotating cam. The cam actuates a pulser so as to generate an active pulse at a tissue site for analysis by an optical sensor. The axle rotates a slotted encoder wheel or a reflective encoder cylinder disposed within the housing so as to accurately determine the axle position and, hence, the active pulse frequency and phase.
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