Optical measuring device using optical fibers
First Claim
1. Optical measuring device for measuring physical magnitudes, comprising:
- a sensor actuated by the physical magnitude to be measured;
means for generating optic input signals to said sensor;
means for processing optic output signals emanating from said sensor and including at least two optical detection means;
at least one optical input fiber for transmitting said optic input signals to said sensor and at least two optical output fibers for transmitting said optic output signals to said at least two optical detection means;
said sensor including means for modulating at least a portion of the light conducted thereto such that said optic output signals contain at least one measuring component representative of the magnitude to be measured and at least one stabilizing component with a smaller dependence on said physical magnitude than said measuring component; and
said means for processing further including means for separating said at least one measuring component and said at least one stabilizing component, and means for generating therefrom at least one measuring signal and at least one compensating signal, and means responsive to said at least one compensating signal for reducing the dependence of said measuring signal on instabilities in the the measuring device.
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Abstract
In an optical measuring device for measuring physical magnitudes a sensor is actuated by the physical magnitude to be measured. An optical signal generator and processor provides light signals to the sensor and processes optical output signals transmitted from the sensor. Optical fibers conduct light to the sensor and transmit light signals therefrom to optical detectors. The sensor modulates at least a portion of the light transmitted thereto such that the modulated light output therefrom transmitted to the optic processor contains measuring components representative of the magnitude to be measured and stabilizing component signals independent of the magnitude. The optical processor separates the measuring components and the stabilizing components and generates at least one measuring signal and compensating signals for stabilizing the measuring device.
48 Citations
15 Claims
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1. Optical measuring device for measuring physical magnitudes, comprising:
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a sensor actuated by the physical magnitude to be measured; means for generating optic input signals to said sensor; means for processing optic output signals emanating from said sensor and including at least two optical detection means; at least one optical input fiber for transmitting said optic input signals to said sensor and at least two optical output fibers for transmitting said optic output signals to said at least two optical detection means; said sensor including means for modulating at least a portion of the light conducted thereto such that said optic output signals contain at least one measuring component representative of the magnitude to be measured and at least one stabilizing component with a smaller dependence on said physical magnitude than said measuring component; and said means for processing further including means for separating said at least one measuring component and said at least one stabilizing component, and means for generating therefrom at least one measuring signal and at least one compensating signal, and means responsive to said at least one compensating signal for reducing the dependence of said measuring signal on instabilities in the the measuring device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification