基于磁弹效应的钢板内应力传感器无损检测系统  

Design and Research of Steel Strip Internal Stress Sensor Based on Magnetostrictive Effect

作　　者：曾杰伟[1] 张清东[1] 苏兰海[1] 徐立坪[1] 马翔华 缪存孝[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《仪表技术与传感器》2015年第10期75-78,87,共5页Instrument Technique and Sensor

基　　金：国家科技支撑计划重点项目(2011BAE13B05);国家自然科学基金项目(51075031)

摘　　要：针对板带钢内应力磁弹式无损检测过程中提离值变化严重影响检测精度这一问题,提出了一种基于逆磁致伸缩原理的四磁极透射式应力检测方法。采用正弦谐振励磁的供电方案以适应带钢生产现场电磁干扰工况,并在自行研制透射式磁力传感器基础上,对低碳钢Q235钢板试样进行了实验研究,重点对传感器非接触测量过程中提离影响展开了讨论,提出了解决提离值变化引起的系统稳定性波动的方法。重复性实验结果表明,所研制的透射式磁力传感器可实现对钢板内应力检测的线性响应,测量重复性良好。To eliminate the disturbance of lift-off variation,a kind of transmissive quadrapole layout with two magnetic poles was proposed based on the magneto-elastic effect. The supply scheme of sinusoidal excitation resonant power was adopted in order to reduce MI in the steel production site. Through conducting experiments with the tested piece made of low carbon steel Q235,both of rationality and reliability of the system were studied. Furthermore,the influence of lift-off on non-contact measurement of magneto-elastic sensor was analyzed. The experimental results revealed that the transmissive quadrapole layout demonstrated an excellent linear response with strip internal stresses. The feasibility of online magnetic detection method in internal stresses zone was verified through the experiment. Besides,the method can effectively solve the detuning problems caused by the change of lift-off.

关 键 词：磁弹效应 谐振 提离 钢板 内应力 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]