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Title: Capacitance measurements of the volume fraction and velocity of dielectric solids near a grounded wall

Abstract

We describe capacitance probes that infer the volume fraction of solids near a grounded wall from a measurement of the effective dielectric constant of the suspension. The probes consist of three conductors, namely the sensor, guard, and ground surfaces. The instrument records capacitance between the sensor and ground by supplying an oscillating current of constant amplitude to the sensor. A control circuit maintains the guard and sensor voltages equal without affecting the sensor circuit. Because it surrounds the sensor conductor everywhere except at the probe surface, the guard eliminates stray and cable capacitances. By locating the ground at the periphery of the probe, this configuration renders the new instrument particularly useful in metallic vessels. Cross-correlation of the signals from two adjacent capacitance probes also permits measurements of the velocity of dielectric solids. {copyright} {ital 1996 American Institute of Physics.}

Authors:
; ; ;  [1]
  1. Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14853 (United States)
Publication Date:
OSTI Identifier:
284109
DOE Contract Number:  
AC22-91PC90183
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 67; Journal Issue: 5; Other Information: PBD: May 1996
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; SUSPENSIONS; DIELECTRIC MATERIALS; VOLUME; VELOCITY; WALL EFFECTS; CAPACITANCE; MEASURING INSTRUMENTS; SENSORS

Citation Formats

Louge, M, Tuccio, M, Lander, E, and Connors, P. Capacitance measurements of the volume fraction and velocity of dielectric solids near a grounded wall. United States: N. p., 1996. Web. doi:10.1063/1.1146991.
Louge, M, Tuccio, M, Lander, E, & Connors, P. Capacitance measurements of the volume fraction and velocity of dielectric solids near a grounded wall. United States. https://doi.org/10.1063/1.1146991
Louge, M, Tuccio, M, Lander, E, and Connors, P. 1996. "Capacitance measurements of the volume fraction and velocity of dielectric solids near a grounded wall". United States. https://doi.org/10.1063/1.1146991.
@article{osti_284109,
title = {Capacitance measurements of the volume fraction and velocity of dielectric solids near a grounded wall},
author = {Louge, M and Tuccio, M and Lander, E and Connors, P},
abstractNote = {We describe capacitance probes that infer the volume fraction of solids near a grounded wall from a measurement of the effective dielectric constant of the suspension. The probes consist of three conductors, namely the sensor, guard, and ground surfaces. The instrument records capacitance between the sensor and ground by supplying an oscillating current of constant amplitude to the sensor. A control circuit maintains the guard and sensor voltages equal without affecting the sensor circuit. Because it surrounds the sensor conductor everywhere except at the probe surface, the guard eliminates stray and cable capacitances. By locating the ground at the periphery of the probe, this configuration renders the new instrument particularly useful in metallic vessels. Cross-correlation of the signals from two adjacent capacitance probes also permits measurements of the velocity of dielectric solids. {copyright} {ital 1996 American Institute of Physics.}},
doi = {10.1063/1.1146991},
url = {https://www.osti.gov/biblio/284109}, journal = {Review of Scientific Instruments},
number = 5,
volume = 67,
place = {United States},
year = {Wed May 01 00:00:00 EDT 1996},
month = {Wed May 01 00:00:00 EDT 1996}
}