论文部分内容阅读
为系统比较轴向和周向励磁方式的漏磁内检测技术对于不同角度缺陷检测结果的可靠度,设计了简易的工程对比试验。该简易工程试验选取平面钢板作为试验样板,在钢板上制作了不同角度的缺陷;同时开发了平板结构的漏磁检测样机,通过改变励磁方向来模拟轴向励磁漏磁和周向励磁漏磁内检测。利用平板结构的漏磁检测样机,以上述两种励磁方式对平面钢板上的缺陷进行漏磁检测并得出检测信号。对比轴向励磁漏磁内检测和周向励磁漏磁内检测对同一缺陷所得的不同检测信号,得出相应的试验结论,即:对于与轴向平行或者夹角≤30°缺陷,周向励磁漏磁内检测技术的检测结果可靠度高;对于与轴向夹角>30°的缺陷,轴向励磁漏磁内检测技术的检测结果可靠度高。
In order to systematically compare the magnetic flux leakage detection technology in the axial and circumferential excitation modes, a simple engineering comparison test was designed for the reliability of the detection results of different angle defects. The simple engineering test selected flat steel plate as a test sample, and fabricated different defects on the steel plate. At the same time, a flat-plate MFL prototype was developed to simulate the axial excitation flux leakage and the circumferential excitation flux leakage flux by changing the excitation direction Detection. The use of flat-panel structure of the flux leakage testing prototype, with the two excitation methods for flat-plate defects on the magnetic flux leakage testing and test signals obtained. Contrasting the axial excitation magnetic flux leakage detection and the circumferential excitation magnetic flux leakage magnetic detection different detection signals obtained by the same defect, the corresponding experimental conclusions are obtained, namely: for the axial parallel or angle ≤30 ° defects, circumferential excitation The detection results of the magnetic flux leakage detection technology have high reliability; for the defects with the axial angle> 30 °, the detection results of the axial excitation magnetic flux leakage detection technology have high reliability.