摘要
针对在地铁基坑混凝土支撑轴力监测中,混凝土支撑轴力测量精度差以及实时性不高的问题,设计了基于嵌入式高精度混凝土支撑轴力实时监测系统。系统实现了振弦式传感器可控激振、测频电路的设计。以基于Cortex-M4内核的STM32F407为主控芯片,通过振弦式传感器对混凝土应力计的应力进行实时监测,监测数据采用RS485总线的方式传输至PC上位机进行处理及显示。系统通过硬件设计及软件修正的方式提高了混凝土应力的测量精度,同时提高了数据处理的实时性。
Due to the measurment low accuracy and poor real-time in the monitoring of Subway Foundation Pit concrete support shaft power,a high-precision embedded real-time monitoring system was designed for concrete support shaft power.System achieved a vibrating wire sensor controlled excitation frequency measurement circuit.Based on the Cortex-M4 core STM32F407 as the master control chip,concrete strain gauges of stress was used to real-time monitoring,data was transmitted by RS485 bus to the PC host computer to be processed and displayed.Measurement accuracy was improved by system hardware design and software correction,as well as real-time data processing.
作者
任珍文
庹先国
李怀良
REN Zhen-wen;TUO Xian-guo;LI Huai-liang(School of National Defense Science and Technology,Southwest University of Science and Technology,Mianyang 621010, China;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology,Chengdu 610059,China)
出处
《仪表技术与传感器》
CSCD
北大核心
2018年第4期60-63,共4页
Instrument Technique and Sensor
基金
国家重大科研仪器设备研制专项项目(41227802)
关键词
支撑轴力
嵌入式
STM32
测频电路
振弦式传感器
axial force of strut
embedded
STM32
frequency measurement circuit
vibrating wire sensor
