摘要
基于巴克豪森噪声(MBN)检测原理,研究了60 kg/m钢轨的巴克豪森信号与压应力的变化关系。介绍了MBN检测系统的设计与实行方案和在应力检测方面的应用。在材料的弹性范围内,MBN平均值、均方根和振铃数都随着压应力的增大而减小,其变化率依次递增。MBN峰值时间随着压应力的增大而增大。MBN信号与温度呈线性关系,可用来检测不同温度下的钢轨应力值。
The relationships between Barkhausen signals in the 60.kg/m rail and the compressive stress are developed in terms of Barkhausen noise（MBN）. The paper reports the design and implementation of MBN systems and its application for stress measurement. In the range of elastic limit, MBN average, RMS, counts decreases with the increase of compressive stress. The rate of changes gradually increases. The peak time of Barkhausen signal increases with the increase of compressive stress. MBN signals show the linear relationship with temperatures, and it can be used to detect stress value of rail at different temperatures.
出处
《无损检测》
2010年第10期757-761,共5页
Nondestructive Testing
基金
国家自然科学基金资助项目(50907032)
江苏省科技厅项目资助项目(BE2009162
BZ2009051)
博士点基金项目资助项目(20093218120019)
关键词
巴克豪森噪声
压应力
钢轨
峰值时间
Magnetic Barkhausen noise
Compressive stress
Rail
Peak time
