Highly time resolved impedance spectroscopy
First Claim
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1. A method of highly time resolved impedance spectroscopy comprising:
- generating an a.c. voltage perturbation signal and applying it to a system;
recording the a.c. voltage perturbation signal and a current signal produced in response to the perturbation signal; and
processing the recorded signals using a non-stationary time to frequency transformation.
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Abstract
A highly time resolved impedance spectroscopy that enhances the measurement of the dynamics of non-stationary systems with enhanced time resolution. The highly time resolved impedance spectroscopy includes an optimized, frequency rich a.c., or transient, voltage signal is used as the perturbation signal, non-stationary time to frequency transformation algorithms are used when processing the measured time signals of the voltage and current to determine impedance spectra which are localized in time; and the system-characterizing quantities are determined from the impedance spectra using equivalent circuit fitting in a time-resolution-optimized form.
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Citations
35 Claims
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1. A method of highly time resolved impedance spectroscopy comprising:
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generating an a.c. voltage perturbation signal and applying it to a system;
recording the a.c. voltage perturbation signal and a current signal produced in response to the perturbation signal; and
processing the recorded signals using a non-stationary time to frequency transformation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus for measuring impedance spectra with high time resolution, the apparatus comprising:
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a memory device configured to store an algorithm for generation of a voltage perturbation signal and instructions to process and evaluate measured data;
at least one analog to digital converter configured to receive a signal representing the voltage perturbation signal and to output a digital value representing the perturbation signal, and to receive an electrical current signal representing a system response to the perturbation signal and to output a digital value representing the system response; and
a processor configured to receive the digital values output by the at least one analog to digital converters, and to receive the algorithm and instructions to process and evaluate measured data from the memory device, and to output a perturbation signal and an impedance spectra, wherein the instructions to process and evaluate measured data comprise a non-stationary time to frequency transformation. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification