Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1998.11b
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- Pages.403-406
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- 1998
Reliable Conversion and Compensation for Temperature of STT
지능형 온도 전송기의 시스템 안정성과 온도 보상
- Lee, Dong-Kyu (Automation Engineering, Inha University) ;
- Park, Jae-Hyun (Korea WAD System) ;
- Kim, Young-Su (Korea WAD System) ;
- Cho, Young-Hak (Korea WAD System)
- Published : 1998.11.28
Abstract
There are two cases of error occurrence of STT(Smart Temperature Transmitter). One is that because of unstable reference voltage, data from A/D converter is not reliable. The other is that because of change of room temperature, this change affects conversion of A/D converter. In this paper, we show algorithms be adapted to STT for reliable conversion of A/D converter through a experiment and compensation for temperature change. In a experiment, we collect data from reference voltage and ground then calculate nominal value of these at constant temperature during A/D converter initialization or at any conversion time. Algorithm for compensation for unstable reference voltage calculates a correction factor and adapts it to compensation for malfunction of A/D converter. Algorithm for compensation for variation of room temperature is come from linearization of thermistor but is adapted to zener diode, not thermistor, therefor we have less effort for compensation for temperature and have a idea that it can be adapted to A/D converter system.
Keywords