METHOD AND SYSTEM FOR ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY
First Claim
1. A method of measuring the spectroscopic impedance of a sensor and its immediate surroundings, wherein the sensor is disposed on an engineered structure and is coated with a protective coating, comprising:
- providing a first optical signal having a first modulation frequency and amplitude;
transmitting the first optical signal and a second optical signal from a first location to a sensor location;
modulating the second optical signal with a second modulation frequency and amplitude, the second modulation frequency and amplitude converted from the first optical signal; and
comparing the first modulation frequency to the second modulation frequency to determine one of a phase difference and a time lag and calculating the electrochemical impedance spectroscopy of the sensor and its immediate surroundings as a function of frequency.
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Abstract
A method and system of measuring the spectroscopic impedance of a sensor and its immediate surroundings. The sensor is disposed on an engineered structure and is coated with a protective coating. The method includes providing a first optical signal having a first modulation frequency and amplitude. The method also includes transmitting the first optical signal and a second optical signal from a first location to a sensor location. The method also includes modulating the second optical signal with a second modulation frequency and amplitude, the second modulation frequency and amplitude converted from the first optical signal. The method also includes comparing the first modulation frequency to the second modulation frequency to determine one of a phase difference and a time lag and calculating the electrochemical impedance spectroscopy of the sensor and its immediate surroundings as a function of frequency.
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Citations
19 Claims
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1. A method of measuring the spectroscopic impedance of a sensor and its immediate surroundings, wherein the sensor is disposed on an engineered structure and is coated with a protective coating, comprising:
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providing a first optical signal having a first modulation frequency and amplitude; transmitting the first optical signal and a second optical signal from a first location to a sensor location; modulating the second optical signal with a second modulation frequency and amplitude, the second modulation frequency and amplitude converted from the first optical signal; and comparing the first modulation frequency to the second modulation frequency to determine one of a phase difference and a time lag and calculating the electrochemical impedance spectroscopy of the sensor and its immediate surroundings as a function of frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A detection system for monitoring a physical condition of an engineered structure, comprising:
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a first sensor disposable on the engineered structure and disposable between a surface of the engineered structure and a protective coating substantially covering the surface, the first sensor including a modulation element; a controller for retrieving data from the sensors, the controller including a comparator circuit and a signal generator to provide an AC signal at a frequency ω
; andone or more optical fibers coupling an optical signal generated by the controller to the first sensor, wherein the first sensor provides electrochemical impedance data corresponding to the engineered structure and protective coating. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification