A Linearization Scheme for Thermistor-Based Sensing in Biomedical Studies
作者： Sabyasachi Bandyopadhyay , Arnab Das , Anwesha Mukherjee , Debangshu Dey , Biswajit Bhattacharyya
DOI: 10.1109/JSEN.2015.2488700
关键词: Engineering 、 Multivibrator 、 Linearization 、 Linearizer 、 Resistor 、 Airflow 、 Electronic engineering 、 Lookup table 、 Thermistor 、 Operational amplifier
摘要: Temperature is one of the basic biophysical quantity monitored for various biomedical systems. Moreover, variation temperature also an important parameter which can be used estimating other measurands, such as respiratory airflow. This paper proposes a simple operational amplifier-based astable multivibrator circuit linearization characteristic negative coefficient thermistor constituting timing resistors. The has been combined with lookup table to get unknown value from output. same system topology linearizer measurement performance composite verified experimentally. A linearity approximately ±0.75% achieved over 30 °C–110 °C in case and ±1.2% airflow 10–60 LPM. Better results introduction interpolation algorithms, but at higher computational component cost. compactness complete makes it good candidate embedded sensing applications systems, point-of-care monitoring or sleep study.
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