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Evaluation of high temperature pressure sensors
In-Mook Choi1, Sam-Yong Woo, Yong-Kyu Kim
1Center for Mass-Related Quantities, Korea Research Institute of Standards and Science, P.O. Box 102, Yuseong, Daejeon 305-600, South Korea.
The Review of Scientific Instruments
|April 5, 2011
Summary
This study introduces a new system for evaluating high-temperature pressure sensors, crucial for industrial applications. It addresses the lack of room-temperature standards by proposing novel compensation methods for accurate high-temperature pressure measurements.
Area of Science:
- Metrology
- Sensor Technology
- Materials Science
Background:
- Accurate pressure measurement in high-temperature industrial environments is critical but challenging.
- Existing pressure standards are primarily established at room temperature, lacking suitability for high-temperature applications.
- High-temperature pressure sensors require specialized evaluation systems and compensation methods to address performance deviations.
Purpose of the Study:
- To develop and evaluate a specialized system for assessing high-temperature pressure sensors (above 250 °C).
- To establish a reliable method for evaluating sensor performance under varying pressures and temperatures.
- To propose compensation techniques for sensor deviations caused by sensitivity changes and nonlinearities.
Main Methods:
- A specialized evaluation system was constructed, linking a room-temperature pressure standard to a high-temperature sensor via a chiller.
- Sensors were evaluated under conditions of changing pressures at constant temperatures and changing temperatures at constant pressures.
- Two compensation methods were developed to correct for sensitivity variations and nonlinear behaviors, excluding thermal hysteresis.
Main Results:
- The constructed system enables comprehensive evaluation of high-temperature pressure sensors.
- The proposed compensation methods effectively address deviations arising from sensitivity changes and nonlinearities.
- The study provides a pathway for accurate pressure metrology in extreme temperature conditions.
Conclusions:
- A robust system and effective compensation methods for high-temperature pressure sensors have been successfully developed and evaluated.
- This research addresses a significant gap in pressure metrology for industrial applications operating at elevated temperatures.
- The findings pave the way for improved reliability and accuracy of pressure measurements in harsh environments.
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