摘要
工程中混凝土的不断水化,所产生的温度应力导致各个部位收缩膨胀不均匀是其开裂的主要原因。文中提出了一种多通道的空间温度场超低功耗测量数据融合方法。利用三线制Pt100、外部恒压源、多通道开关切换电路、24位的△-∑ADC组成的系统来测量混凝土内部空间温度场温度,结合贝叶斯理论和卡尔曼滤波对温度场温度进行数据融合滤波处理,引入窄带物联网模块并结合超低功耗设计方法,在保证联网的同时又极大降低了待机功耗。实验结果表明:测温精度达到0.03℃,解决了引线及芯片导通内阻的问题;待机功耗电流降至139.13μA,对数据的融合滤波处理能更准确反映混凝土内部温度场温度。
The main reason for the cracking of concrete is the uneven shrinkage and expansion of various parts caused by the temperature stress caused by hydration in engineering.In this paper,a multi-channel ultra-low power measurement data fusion method of spatial temperature field was proposed.A system composed of three-wire Pt100,external constant voltage source,multi-channel switching circuit and 24-bit△-∑ADC was used to measure the temperature field in the internal space of concrete.The temperature field temperature was processed by data fusion filtering combined with Bayes theory and Kalman filter,narrowband Internet of Things module was introduced and ultra-low power design method was combined.While ensuring networking,the standby power consumption was greatly reduced.The experimental results show that the temperature measurement accuracy rea-ches 0.03℃,which solves the problem of the internal resistance of the lead and chip.The standby power consumption current is reduced to 139.13μA,and the fusion filtering of the data can more accurately reflect the internal temperature field temperature of the concrete.
作者
朱国鑫
周达左
焦竹青
ZHU Guoxin;ZHOU Dazuo;JIAO Zhuqing(School of Microelectronics and Control Engineering,Changzhou University;Changzhou Shengde Marine Equipment Co.,LTD;School of Computer and Artificial Intelligence,Changzhou University)
出处
《仪表技术与传感器》
CSCD
北大核心
2024年第8期71-77,126,共8页
Instrument Technique and Sensor
基金
江苏省学位与研究生教育教学改革课题(JGKT23_C065)
江苏高校“青蓝工程”资助项目(苏教师函〔2022〕29号)。
关键词
温度场
多通道
超低功耗
数据融合
卡尔曼滤波
temperature field
multichannel
ultra-low power consumption
data fusion
Kalman filtering
