Temperature measurement method using temperature coefficient timing for resistive or capacitive sensors

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872111

Ericson, M Nance ^[1]

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1. Knoxville, TN

A method and apparatus for temperature measurement especially suited for low cost, low power, moderate accuracy implementation. It uses a sensor whose resistance varies in a known manner, either linearly or nonlinearly, with temperature, and produces a digital output which is proportional to the temperature of the sensor. The method is based on performing a zero-crossing time measurement of a step input signal that is double differentiated using two differentiators functioning as respective first and second time constants; one temperature stable, and the other varying with the sensor temperature.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-96OR22464
• Assignee: Lockheed Martin Energy Research Corporation (Oak Ridge, TN)
• Patent Number(s): US 5862170
• OSTI ID: 872111
• Country of Publication: United States
• Language: English

Related Subjects

temperature
measurement
method
coefficient
timing
resistive
capacitive
sensors
apparatus
especially
suited
cost
power
moderate
accuracy
implementation
sensor
resistance
varies
manner
linearly
nonlinearly
produces
digital
output
proportional
based
performing
zero-crossing
time
step
input
signal
double
differentiated
differentiators
functioning
respective
constants
stable
varying
especially suited
temperature coefficient
input signal
time constant
temperature measurement
measurement method
temperature stable
time measurement
temperature measure
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