MEASURING METHOD FOR DETECTING A MECHANICAL FORCE ACTING ON AN OBJECT USING A FIBER OPTIC SENSOR UNIT
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United States of America
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Feb 20, 2025
app pub date -
Nov 2, 2024
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Nov 2, 2024
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Abstract
A measuring method for detecting a mechanical force acting on an object using a fiber optic sensor unit is disclosed. At least one measuring channel has a sensor fiber with a fiber Bragg grating embedded in the sensor fiber with a Bragg wavelength and a sensor detection element. The sensor fiber is fixed to the object in the area of the sensor FBG. The method includes coupling light from a light source into the sensor fiber and detecting the light reflected and/or transmitted by the sensor FBG by the sensor detection element. The light source has a wavelength-dependent intensity distribution with an edge. A wavelength change in the Bragg wavelength of the sensor FBG is determined by evaluating a measurement signal which has an intensity change in the detected light intensity of the entire light reflected by the sensor FBG and/or of the entire light transmitted by the sensor FBG.
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