Stresses have great influences on the mechanical performance and corrosion resistance of pipelines. Magnetic Barkhausen noise (MBN) as an effective non-destructive testing method for evaluating stress in ferromagnetic materials has been widely studied in recent decades. Different from traditional MBN methods based on a time-varying magnetic field, this paper proposed a novel MBN method to induce Barkhausen noise based on rotating permanent magnets, which achieves efficient stress measurement in pipelines. Under different rotating speeds, the characterization of surface tangential excitation field induced by rotating permanent magnets are analyzed by Hall measurements and extrapolation method. Experimental results validate that the proposed method has a good detectability and sensitivity of stress measurement in pipelines.

中文翻译：

---

用于评估管道应用应力的运动感应磁巴克豪森噪声

应力对管道的力学性能和耐腐蚀性能有很大影响。近几十年来，磁性巴克豪森噪声 (MBN) 作为一种评估铁磁材料应力的有效无损检测方法得到了广泛研究。与传统的基于时变磁场的MBN方法不同，本文提出了一种基于旋转永磁体诱导巴克豪森噪声的新型MBN方法，实现了管道应力的高效测量。采用霍尔测量和外推法分析了在不同转速下旋转永磁体产生的表面切向激励场的表征。实验结果验证了该方法对管道应力测量具有良好的可检测性和灵敏度。