Temperature compensation and scalability of hysteretic/anhysteretic magnetic-property sensors

Non-destructive/noncontact stress sensors based on magnetoelastic principles have numerous applications for monitoring cable stress. However, their widespread use is hampered by problems related to temperature compensation and to scaling of calibration data to large cables, which is the domain of greatest interest. In this paper, experimental magnetic property and thermal response data are obtained and analyzed to address these problems. The magnetic property data include initial curves, major hysteresis loops, and anhysteresis curves, all obtained quasistatically. The thermal response data are presented in the form of a dimensionless correlation which is valid over a range of Reynolds numbers. Comparison of data indicates the feasibility of using absolute magnetic property measurements as the basis for direct calibration of large sensors.

[1]  C. Graham,et al.  DC and low-frequency magnetic measuring techniques , 1993 .

[2]  D. Gordon,et al.  Methods for measuring the magnetic field , 1972 .

[3]  R. A. Langman,et al.  Comparison of the normal and initial induction curves , 2001 .

[4]  F. Kundracik,et al.  Fitting experimental anhysteretic curves of ferromagnetic materials and investigation of the effect of temperature and tensile stress , 1996 .

[5]  Sérgio Souto Maior Tavares,et al.  Magnetic properties of an AISI 420 martensitic stainless steel , 2000 .

[6]  Shang-Shiang Hsu,et al.  Aging monitoring via magnetic property change of pressure vessel materials , 1996 .

[7]  D. Jiles,et al.  Theory of ferromagnetic hysteresis , 1986 .

[8]  G. M. Lloyd,et al.  Experimental evaluation of differential thermal errors in magnetoelastic stress sensors for Re<180 , 2002, Proceedings of IEEE Sensors.

[9]  C. Graham,et al.  Introduction to Magnetic Materials , 1972 .

[10]  Y. Jaluria,et al.  An Introduction to Heat Transfer , 1950 .

[11]  George M. Lloyd,et al.  TED-AJ03-596 Effects of Temperature and Corrosion Thickness and Composition on Magnetic Measurements of Structural Steel Wires , 2004 .

[12]  A. Jarosevic,et al.  Magnetoelastic Method of Stress Measurement in Steel , 1999 .

[13]  David Jiles,et al.  Coupled magnetoelastic theory of magnetic and magnetostrictive hysteresis , 1993 .

[14]  Hegeon Kwun,et al.  Effects of grain size, hardness, and stress on the magnetic hysteresis loops of ferromagnetic steels , 1987 .

[15]  A. Mills.  Method for measuring magnetic moments with precision , 1974 .

[16]  G. M. Lloyd,et al.  Comparison of surface H-field measurements using Hall sensors and a novel multiple sense coil approach , 2002, Proceedings of IEEE Sensors.