后勤工程学院学报
後勤工程學院學報
후근공정학원학보
Journal of Logistical Engineering University
2015年
5期
41-45
,共5页
漏磁检测%检测探头%提离效应%磁偶极子模型
漏磁檢測%檢測探頭%提離效應%磁偶極子模型
루자검측%검측탐두%제리효응%자우겁자모형
magnetic flux leakage detection%detection probe%lift-off effect%magnetic dipole model
对漏磁检测探头提离效应进行了探讨，建立了裂纹缺陷漏磁检测提离效应分析模型，分析了裂纹缺陷磁偶极子二维数学解析模型，研究了探头提离值对漏磁信号的影响规律。研究发现，在漏磁检测过程中，探头提离效应会影响磁场强度，随着提离值的增大，检测到的漏磁场强度由强变弱。提离值增大到一定值后，漏磁场强度达到一个恒定值，即对漏磁场的测量已经失去意义。因此要求在设计漏磁检测装置时，必须充分考虑检测探头提离效应的影响，以提高检测准确性。
對漏磁檢測探頭提離效應進行瞭探討，建立瞭裂紋缺陷漏磁檢測提離效應分析模型，分析瞭裂紋缺陷磁偶極子二維數學解析模型，研究瞭探頭提離值對漏磁信號的影響規律。研究髮現，在漏磁檢測過程中，探頭提離效應會影響磁場彊度，隨著提離值的增大，檢測到的漏磁場彊度由彊變弱。提離值增大到一定值後，漏磁場彊度達到一箇恆定值，即對漏磁場的測量已經失去意義。因此要求在設計漏磁檢測裝置時，必鬚充分攷慮檢測探頭提離效應的影響，以提高檢測準確性。
대루자검측탐두제리효응진행료탐토，건립료렬문결함루자검측제리효응분석모형，분석료렬문결함자우겁자이유수학해석모형，연구료탐두제리치대루자신호적영향규률。연구발현，재루자검측과정중，탐두제리효응회영향자장강도，수착제리치적증대，검측도적루자장강도유강변약。제리치증대도일정치후，루자장강도체도일개항정치，즉대루자장적측량이경실거의의。인차요구재설계루자검측장치시，필수충분고필검측탐두제리효응적영향，이제고검측준학성。
The issue of magnetic flux leakage (MFL) detection probe lift?off effect is discussed. With the establishment of a model of the probe lift?off effect of magnetic flux leakage detection for crack defects, the two?dimensional mathematical analysis model of crack defects magnetic dipole is analyzed, and the influence rule of detection probe lift?off effect on magnetic flux leakage signals is studied. The research shows that the probe lift?off effect will affect the magnetic field strength in the process of the magnetic flux leakage detection. With the lift?off value increasing, the detected leakage magnetic field strength changes from strong to weak. And when the lift?off value increases to a certain one, the leakage magnetic field strength achieves a consant value, which indicates that the measurement of the leakage magnetic field has become meaningless. Consqeuently, it is required that detection probe lift?off effect should be fully taken into considertaion when designing magnetic flux leakage detection device, in order to improve the accuracy of detection.
