摘要
为满足有关岩石破裂电磁辐射研究的需要,研制一套电磁辐射监测系统。该系统由电磁感应探头、信号调理电路和数据采集系统组成,可对频率在1kHz^1MHz内的微弱电磁场进行监测。电磁感应探头可感应空间中某一方向的电磁场变化,并将其转换成电信号;信号调理电路对探头输出的电信号进行放大、滤波,并实现放大滤波电路与计算机的电气隔离;数据采集软件基于LabVIEW编写,用于对监测到的信号进行记录和显示。实验结果表明:该系统性能稳定,操作简便,能够有效地监测岩石破裂所产生的电磁辐射,对岩石、混凝土等材料的力-电-磁研究具有重要意义。
This rock fracture electromagnetic emission monitoring system is developed to meet the need of research on electromagnetic emission during rock fracture. The system consists of electromagnetic induction probe,signal conditioning circuit and data acquisition system,and it is capable of monitoring weak electromagnetic fields with frequency from 1 kHz to 1 MHz. The electromagnetic induction probe can detect spatial magnetic field changes in a certain direction and convert it into electric signals. The signal conditioning circuit can magnify, filter probe-outputted signals, and achieve electric isolation between amplifying-filtering circuit and the computer,while data acquisition software based on LabVIEW programming is used for recording and displaying the detected signals. The experimental results show the system owes high stability and user-friendly operation. On the whole,this system is able to monitor electromagnetic emission during rock failure, and will have a positive impact on the mechanical-electronic-magnetic research among materials like rock,concrete,etc.
出处
《中国测试》
CAS
北大核心
2013年第6期64-67,共4页
China Measurement & Test
基金
国家自然科学基金项目(51277101)
教育部高校学科建设专项资金资助项目(20111081122)
关键词
岩石破裂电磁辐射
电磁感应
信号调理电路
LABVIEW编程
rock fracture electromagnetic emission
electromagnetic induction
signal conditioning circuit
LabVIEW programming
