Patent ID: 9222830
Filing Date: 2015-12-29
Classification: G01D,G01J,H04J,H05B

Abstract:
1. An optical control sensor system comprising: light sources for emitting light; an orthogonal signal generator, generating a set of different orthogonal signals; a driver for switching frequencies of the set of different orthogonal signals and modulating an intensity of the light emitted by the light sources; an optical fiber receiving the light of the light sources at a first end thereof; a terminal sensor coupled to a second end of the optical fiber, the terminal sensor selecting a predetermined set of input orthogonal signals for converting them into component combinations to constitute output signals, and directing the output signals to the second end of the optical fiber; a device coupled to the light sources and to the first end of the optical fiber for extracting the output signals that have passed through a return path in the optical fiber; a detector converting the output signals into a plurality of electrical signals; and a selector and a decoder connected to the orthogonal signal generator to indicate a current state of the optical control sensor system and to provide continuous self-testing of the system based upon an analysis of selected combinations of components in the output signals.