Method of detecting system function by measuring frequency response
Abstract
Methods of rapidly measuring an impedance spectrum of an energy storage device in-situ over a limited number of logarithmically distributed frequencies are described. An energy storage device is excited with a known input signal, and a response is measured to ascertain the impedance spectrum. An excitation signal is a limited time duration sum-of-sines consisting of a select number of frequencies. In one embodiment, magnitude and phase of each frequency of interest within the sum-of-sines is identified when the selected frequencies and sample rate are logarithmic integer steps greater than two. This technique requires a measurement with a duration of one period of the lowest frequency. In another embodiment, where selected frequencies are distributed in octave steps, the impedance spectrum can be determined using a captured time record that is reduced to a half-period of the lowest frequency.
- Inventors:
- Issue Date:
- Research Org.:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1082875
- Patent Number(s):
- 8352204
- Application Number:
- 12/772,880
- Assignee:
- Battelle Energy Alliance, LLC (Idaho Falls, ID)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
- DOE Contract Number:
- AC07-05ID14517
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE
Citation Formats
Morrison, John L., Morrison, William H., Christophersen, Jon P., and Motloch, Chester G. Method of detecting system function by measuring frequency response. United States: N. p., 2013.
Web.
Morrison, John L., Morrison, William H., Christophersen, Jon P., & Motloch, Chester G. Method of detecting system function by measuring frequency response. United States.
Morrison, John L., Morrison, William H., Christophersen, Jon P., and Motloch, Chester G. Tue .
"Method of detecting system function by measuring frequency response". United States. https://www.osti.gov/servlets/purl/1082875.
@article{osti_1082875,
title = {Method of detecting system function by measuring frequency response},
author = {Morrison, John L. and Morrison, William H. and Christophersen, Jon P. and Motloch, Chester G.},
abstractNote = {Methods of rapidly measuring an impedance spectrum of an energy storage device in-situ over a limited number of logarithmically distributed frequencies are described. An energy storage device is excited with a known input signal, and a response is measured to ascertain the impedance spectrum. An excitation signal is a limited time duration sum-of-sines consisting of a select number of frequencies. In one embodiment, magnitude and phase of each frequency of interest within the sum-of-sines is identified when the selected frequencies and sample rate are logarithmic integer steps greater than two. This technique requires a measurement with a duration of one period of the lowest frequency. In another embodiment, where selected frequencies are distributed in octave steps, the impedance spectrum can be determined using a captured time record that is reduced to a half-period of the lowest frequency.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {1}
}
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