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Evaluation of Impedance Measurement Using Spread Spectrum Time Domain Reflectometry

Journal Article · · IEEE Transactions on Instrumentation and Measurement
 [1];  [2];  [3]
  1. University of Utah, Salt Lake City, UT (United States); University of Utah
  2. University of Florida, Gainesville, FL (United States)
  3. University of Utah, Salt Lake City, UT (United States); Livewire Innovation, Camarillo, CA (United States)

We evaluate the feasibility of spectral time domain reflectometry (STDR) and spread spectrum time domain reflectometry (SSTDR) as a new modality for impedance measurement to test energized/noisy systems over a very broad frequency spectrum (near dc to gigahertz) as well as multiple channels in parallel. We simulate how the S/SSTDR signal parameters (signal-to-noise ratio (SNR) frequency and length of the pseudo-noise (PN) signals) affect the accuracy and usable frequency band for reflection coefficient and impedance measurement. An initial measurement validation is included. Here, we conclude with a recommendation of what will be required for a viable multichannel impedance (and reflection, transmission coefficient) measurement system for either energized or nonenergized systems, in noisy environments, that can test multiple channels simultaneously.

Research Organization:
University of Utah, Salt Lake City, UT (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
Grant/Contract Number:
EE0008169
OSTI ID:
2234294
Journal Information:
IEEE Transactions on Instrumentation and Measurement, Journal Name: IEEE Transactions on Instrumentation and Measurement Vol. 72; ISSN 0018-9456
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English

References (24)

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conference January 2019
Robust imaging using electrical impedance tomography: review of current tools
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journal February 2022
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