Optical control sensor system with driver that switches frequencies of a set of different orthogonal signals and modulates the intensity of light
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United States of America Patent
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Dec 29, 2015
Grant Date -
Jun 27, 2013
app pub date -
Jun 17, 2011
filing date -
Jun 17, 2010
priority date (Note) -
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Abstract
A optical control sensor system includes a driver controlling an operation of a light source coupled to an end of an optical fiber, an orthogonal signal generator, generating a set of different orthogonal signals controlling the driver, a terminal sensor coupled to another end of the optical fiber selecting a predetermined set of input orthogonal signals for converting them into component combinations, constituting output signals, and directing the output signals back to the optical fiber, a device coupled to the light sources and to the first end of the optical fiber for extracting output signals that have passed through a return path in the optical fiber, a detector converting optical output signals into electrical signals, and a selector and a decoder connected to the orthogonal signal generator indicating a current state of the optical control sensor system based on an analysis of the selected combinations of components in the output signals.
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