Abstract:Objective To design of a portable temperature measurement equipment based on NTC thermistor. Methods Firstly, based
on the constant current source, negative temperature coeffcient (NTC) thermistor was chosen as the body temperature sensor, and
high-precision differential analog digital converter (ADC) chip was used to convert analog signal to digital signal. Then, the digital
signal was sent into the microcontroller analysis and processing, the error source of various parts and calibration scheme were given.
Finally, the equipment was experimentally verified. Results The experimental results showed that the measurement error of the
body temperature measurement equipment after the error calibration was less than ±0.1℃, which fully met the standard of medical
electronic thermometer. Conclusion This system presents a new design scheme with strong stability and practicability. At the same
time, the real-time calibration method mentioned in the calibration scheme also provides some reference value for further study of
electronic thermometer calibration.
苑冬梅,杨坤,张妍妍,李宝杰. 基于NTC的体温测量系统设计[J]. 中国医疗设备, 2017, 32(11): 98-103.
YUAN Dongmei, YANG Kun, ZHANG Yanyan, LI Baojie. Design of Temperature Measurement System Based on Negative Temperature Coeffcient. China Medical Devices, 2017, 32(11): 98-103.