Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Chinese Journal of Sensors and Actuators》 2018-06
Add to Favorite Get Latest Update

Design of A High-Precision and Low-Power Temperature Acquisition System Based on NB-IoT

L Wei;ZHAO Jiali;School of Electronic Information Engineering,Tianjin University;  
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 equation,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.
【Fund】: 国家海洋实验室2016开放基金项目(QNLM2016OPR0411)
【CateGory Index】: TP274.2
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved