摘要
针对铁路养护中对长轨(CWR)纵向温度应力监测的难题,基于声弹性原理,介绍了一种利用LCR波来实现其自动化检测的超声波无损检测(NDT)系统,并对该系统的超声波探头和声时测量单元的结构及工作原理进行阐述。系统采用软件方式校正和消除温度对实际测量声速的影响,提高了超声检测应力的测量精度,从而达到了铁路监测要求。
An automatic NDT system for longitudinal thermal stresses in continuously welded rails with LCR wave, which is based on acoustoelastic theory, is described in this paper. The working principles of ultrasonic probehead and the LCR wave flight-time measured unit in the system are also introduced. In order to achieve the demands of railway, the linearity and the influence of temperature to system program is cousidered.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2006年第5期844-847,共4页
Journal of University of Electronic Science and Technology of China
关键词
长轨
温度应力
声弹性
无损检测
LCR波
continuously welded rails
thermal stresses
acoustoelastic theory
ultrasonic testing
LCR wave
