Study on Magnetic Flux Leakage Model and Experimental Apparatus of Metal Magnetic Memory Testing
Metal Magnetic Memory Testing (MMMT) technique, which measures the distribution of a magnetic field on a magnetized specimen by using a magnetic sensor such as a magnetoresistive sensor, is an effective nondestructive testing (NDT) method for detecting surface cracks and stress concentration zones on magnetized ferromagnetic materials. Based on the principle of metal magnetic memory testing, and combined with the shape of a cylinder of ferromagnetic component, we established a magnetic flux leakage model and gave the relevant mathematical formulas of leakage magnetic field model. According to the characteristics of zero-crossing and maximum, we proposed an integrated approach which combines Peak-Peak value, gradient and zero-crossing point to judge and estimate stress concentration zones. The mathematical model of magnetic flux leakage was simulated, and the cylindrical ferromagnetic component with obvious crack was detected by onedimensional metal magnetic memory testing platform. The results showed that the detection system can detect the magnetic flux leakage.
Metal Magnetic Memory Testing (MMMT) non-destructive detection (NDT) ferromagnetic component magnetic flux leakage
Wang Binbo Liao Changrong Shi Xiangcong
Key Lab for Optoelectronic Technology & Systems under MOE,Chongqing University,Chongqing 400044 Chongqing Institute of Industrial Automation Instrumentation,Chongqing 401123,China
国际会议
厦门
英文
1497-1503
2010-05-22（万方平台首次上网日期，不代表论文的发表时间）