skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Monolithically compatible impedance measurement

Abstract

A monolithic sensor includes a reference channel and at least one sensing channel. Each sensing channel has an oscillator and a counter driven by the oscillator. The reference channel and the at least one sensing channel being formed integrally with a substrate and intimately nested with one another on the substrate. Thus, the oscillator and the counter have matched component values and temperature coefficients. A frequency determining component of the sensing oscillator is formed integrally with the substrate and has an impedance parameter which varies with an environmental parameter to be measured by the sensor. A gating control is responsive to an output signal generated by the reference channel, for terminating counting in the at least one sensing channel at an output count, whereby the output count is indicative of the environmental parameter, and successive ones of the output counts are indicative of changes in the environmental parameter.

Inventors:
 [1];  [2]
  1. Knoxville, TN
  2. Oak Ridge, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
874765
Patent Number(s):
6456096
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
monolithically; compatible; impedance; measurement; monolithic; sensor; reference; channel; sensing; oscillator; counter; driven; formed; integrally; substrate; intimately; nested; matched; component; values; temperature; coefficients; frequency; determining; parameter; varies; environmental; measured; gating; control; responsive; output; signal; generated; terminating; counting; count; indicative; successive; ones; counts; changes; output signal; temperature coefficient; /324/257/

Citation Formats

Ericson, Milton Nance, and Holcomb, David Eugene. Monolithically compatible impedance measurement. United States: N. p., 2002. Web.
Ericson, Milton Nance, & Holcomb, David Eugene. Monolithically compatible impedance measurement. United States.
Ericson, Milton Nance, and Holcomb, David Eugene. Tue . "Monolithically compatible impedance measurement". United States. https://www.osti.gov/servlets/purl/874765.
@article{osti_874765,
title = {Monolithically compatible impedance measurement},
author = {Ericson, Milton Nance and Holcomb, David Eugene},
abstractNote = {A monolithic sensor includes a reference channel and at least one sensing channel. Each sensing channel has an oscillator and a counter driven by the oscillator. The reference channel and the at least one sensing channel being formed integrally with a substrate and intimately nested with one another on the substrate. Thus, the oscillator and the counter have matched component values and temperature coefficients. A frequency determining component of the sensing oscillator is formed integrally with the substrate and has an impedance parameter which varies with an environmental parameter to be measured by the sensor. A gating control is responsive to an output signal generated by the reference channel, for terminating counting in the at least one sensing channel at an output count, whereby the output count is indicative of the environmental parameter, and successive ones of the output counts are indicative of changes in the environmental parameter.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

Save / Share:

Works referenced in this record:

Sensor for determining the water content of oil-in-water emulsion by specific admittance measurement
journal, March 1995


A Capacitive Oil Deterioration Sensor
conference, February 1991


In situ monitoring of high-temperature degraded engine oil condition with microsensors
journal, May 1994