Journal ArticleDOI
Low frequency impedance measurement using sine-fitting
TLDR
An impedance measurement technique based on the use of a personal computer, two digitizing channels and the application of four-parameter sine-fitting algorithms to estimate amplitude, phase, offset and frequency of the voltages across the impedance under measurement and of a reference impedance is described.About:
This article is published in Measurement.The article was published on 2004-01-01. It has received 70 citations till now. The article focuses on the topics: Personal computer & Electrical impedance.read more
Citations
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Journal ArticleDOI
A new sine-fitting algorithm for accurate amplitude and phase measurements in two channel acquisition systems
Pedro M. Ramos,A.C. Serra +1 more
TL;DR: A new algorithm to estimate the sinewave parameters of two acquired sine signals sharing a common frequency can be used for example in impedance measurements or in the accurate frequency characterization of linear systems by measuring its input and output and varying the input signal frequency.
Journal ArticleDOI
A Four-Terminal Water-Quality-Monitoring Conductivity Sensor
TL;DR: The main advantages of the proposed conductivity sensor include a wide measurement range, an intrinsic capability to minimize errors caused by fouling and polarization effects, and an automatic compensation of conductivity measurements caused by temperature variations.
Journal ArticleDOI
Cross-Correlation and Sine-Fitting Techniques for High-Resolution Ultrasonic Ranging
TL;DR: This paper presents a combination of two techniques for high resolution ultrasonic distance measurements in air, the first is the cross-correlation between transmitted and received signals to determine the time-of-flight (TOF), and the second is the sine-fitting to determined the phase-shift between these signals.
Journal ArticleDOI
Bias of amplitude estimation using three-parameter sine fitting in the presence of additive noise
TL;DR: It is demonstrated that although the estimator is biased, it is asymptotically unbiased, that is, the estimation error vanishes as the number of data points increase to infinity.
Journal ArticleDOI
A Miniature, High Precision Conductivity and Temperature Sensor System for Ocean Monitoring
TL;DR: In this article, a miniature high precision conductivity and temperature (CT) sensor system has been developed for ocean salinity monitoring using micro fabrication technology, which has a 1 month battery life at 10 s sampling interval.
References
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Journal ArticleDOI
Histogram measurement of ADC nonlinearities using sine waves
TL;DR: This paper gives results concerning the measurement of differential and integral nonlinearity of ADC's using the histogram method with a sine wave input signal and the effect on the results of harmonic distortion of the applied signal.
Journal ArticleDOI
A high-resolution, linear resistance-to-frequency converter
K. Mochizuki,Kenzo Watanabe +1 more
TL;DR: In this article, a resistance-to-frequency converter consisting of a Wheatstone bridge followed by an integrator and a comparator is described, whose frequency changes linearly with a resistance change detected by the bridge.
Journal ArticleDOI
A digital signal-processing instrument for impedance measurement
TL;DR: In this article, a digital signal processing (DSP)-based instrument for impedance measurement is proposed, which implements two measurement techniques: the first technique allows the tracking of a time varying impedance to be carried out, and the second assures that good accuracy is obtained in reasonable measurement times.
Journal ArticleDOI
Performance analysis of an ADC histogram test using small triangular waves
TL;DR: Analytical closed-form relations for designing the histogram method for the quasi-static test of analog-to-digital converters, as well as for its characterization in terms of efficiency and uncertainty are provided.
Journal ArticleDOI
A self-balancing circuit to measure capacitance and loss conductance for industrial transducer applications
TL;DR: A capacitance and loss conductance measuring circuit for the use in industrial transducers based on self-balancing principle and it is immune to stray capacitance.
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A new sine-fitting algorithm for accurate amplitude and phase measurements in two channel acquisition systems
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