传感技术学报2018，Vol.31Issue(6)：836-840,5.DOI:10.3969/j.issn.1004-1699.2018.06.004
一种低功耗高精度的NB-IoT温度采集系统设计
Design of A High-Precision and Low-Power Temperature Acquisition System Based on NB-IoT
摘要
Abstract
To satisfy the demand for precision and low-power of industrial applications,this paper presents a wireless temperature acquisition system based on NB-IoT protocol which employs PIC18F24K22 as the processor,PT100 as the temperature sensor as well as AD7794 as the high precision A/D converter. PT100 is connected in a four-wire configuration to eliminate the voltage error from the connection leads and AD7794 uses a precise resistor to acquire a stable reference voltage so as to eliminate the drift of the constant current source and reduce the influence of the precision of the reference voltage. This paper also presents a high-precision resistance-to-temperature conversion e-quation,which effectively reduces the conversion error. Experimental results show that the precision of measurement is higher than 0.04 degree and the system has an excellent stability in practical environments.关键词
温度采集/四线制铂电阻连接/NB-IoT/AD7794/低功耗Key words
temperature collection/four-wire platinum resistance connection/NB-IoT/AD7794/low power consumption分类
信息技术与安全科学引用本文复制引用
吕卫,赵佳丽..一种低功耗高精度的NB-IoT温度采集系统设计[J].传感技术学报,2018,31(6):836-840,5.基金项目
国家海洋实验室2016开放基金项目(QNLM2016OPR0411) （QNLM2016OPR0411）
