Temperature measurement method using temperature coefficient timing for resistive or capacitive sensors
Patent
·
OSTI ID:321281
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. 5 figs.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-96OR22464
- Assignee:
- Lockheed Martin Energy Research Corp., Oak Ridge, TN (United States)
- Patent Number(s):
- US 5,862,170/A/
- Application Number:
- PAN: 8-744,357
- OSTI ID:
- 321281
- Resource Relation:
- Other Information: PBD: 19 Jan 1999
- Country of Publication:
- United States
- Language:
- English
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