Arrangement including a plurality of optical fiber bragg grating sensors and method for determining measured values in such arrangement
First Claim
1. A method for determining measured values in an arrangement including a plurality of optical fiber Bragg grating sensors, the method comprising:
- disposing the plurality of optical fiber Bragg grating sensors so as to form at least one sensor array, each of the respective optical fiber Bragg grating sensors in each of the at least one sensor array being arranged one behind the other, being connected by fiber optics, and exhibiting a different respective frequency selectivity;
providing at least one respective delay element in at least one of the at least one sensor array;
receiving a query signal using the plurality of optical fiber Bragg grating sensors, the query signal representing temporally differentiated, frequency-selective light; and
evaluating a response signal so as to assign respective individual partial signals of the response signal to one or more of the plurality of optical fiber Bragg grating sensors based on respective frequencies of the individual partial signals and based on respective propagation delays of the individual partial signals, the respective propagation delays being substantially determined by the at least one respective delay element.
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Accused Products
Abstract
An arrangement for determining measured values, in particular measured pressure values, strain values, or temperature value, using a plurality of optical fiber Bragg grating sensors. The optical fiber Bragg grating sensors are combined to form various arrays of optical fiber Bragg grating sensors that are arranged one behind the other, are connected by fiber optics, and exhibit different frequency selectivities. Delay elements are assigned to these arrays. The Bragg grating sensors receive a uniform query signal representing a time-differentiated, frequency-selective light. The frequency-selective Bragg grating sensors of the various arrays generate partial signals. The partial signals, separated temporally from one another by the delay elements, form a sequence of partial signals. From the knowledge of the propagation delays of the signals and from the knowledge of the frequency information of the query signal, the particular intended measured value is able to be related to a specific Bragg grating sensor of a specific array, thereby enabling the measured value to be allocated to the location of this Bragg grating sensor.
12 Citations
14 Claims
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1. A method for determining measured values in an arrangement including a plurality of optical fiber Bragg grating sensors, the method comprising:
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disposing the plurality of optical fiber Bragg grating sensors so as to form at least one sensor array, each of the respective optical fiber Bragg grating sensors in each of the at least one sensor array being arranged one behind the other, being connected by fiber optics, and exhibiting a different respective frequency selectivity;
providing at least one respective delay element in at least one of the at least one sensor array;
receiving a query signal using the plurality of optical fiber Bragg grating sensors, the query signal representing temporally differentiated, frequency-selective light; and
evaluating a response signal so as to assign respective individual partial signals of the response signal to one or more of the plurality of optical fiber Bragg grating sensors based on respective frequencies of the individual partial signals and based on respective propagation delays of the individual partial signals, the respective propagation delays being substantially determined by the at least one respective delay element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An arrangement for determining measured values, the arrangement comprising:
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a plurality of optical fiber Bragg grating sensors disposed in at least one sensor array, each of the respective optical fiber Bragg grating sensors in each of the at least one sensor array being arranged one behind the other, being connected by fiber optics and exhibiting a different respective frequency selectivity;
at least one respective delay element associated with at least one of the at least one sensor array;
wherein the plurality of optical fiber Bragg grating sensors receive a query signal, the query signal representing temporally differentiated, frequency-selective light; and
wherein a response signal is evaluated so as to assign respective individual partial signals of the response signal to one or more of the plurality of optical fiber Bragg grating sensors based on respective frequencies of the individual partial signals and based on respective propagation delays of the individual partial signals, the respective propagation delays being substantially determined by the at least one respective delay element. - View Dependent Claims (11, 12, 13, 14)
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Specification