Electricity: measuring and testing – Magnetic – Hysteresis loop curve display or recording
Patent
1981-07-20
1984-05-15
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Hysteresis loop curve display or recording
G01R 3314, G01N 2772
Patent
active
044490950
ABSTRACT:
A process for measuring the hysteresis curve of magnetic materials comprises the generation of a magnetic field of varying amplitude, placing the sample to be measured into that field with a measuring coil and a potential coil attached thereto, integrating the signals from those coils to provide simultaneous values of flux density B and internal field intensity H, recording and storing the B and H values and converting these values to digital units in a transient recorder in real time and then feeding these signals to an X-Y recorder, a printer or other display device at a slower rate of speed to provide a hysteresis curve, or a display of programmed values of magnetic characteristics of the sample being measured.
REFERENCES:
patent: 3500180 (1970-03-01), Mogilevsky
patent: 3925725 (1975-12-01), Mogilevsky et al.
patent: 4290014 (1981-09-01), Tremaine
Plassard, "Hysteresisgraph with Discontinuous Sweep Mode", Journal of Magnetism and Magnetic Materials, Apr. 11, 1980, pp. 260-262, North-Holland Publishing Company.
Kasinov et al., "Nondestructive Methods of Testing", Ind. Lab. (U.S.A.), vol. 42, No. 12, Dec. 1976, pp. 1870-1873.
Viles, "Storage and Display of X-Y Information", Maroni Instrumentation, vol. 14, No. 3, 1974, pp. 61-64.
"Model 610B Transient Recorder Operating and Service Manual", Biomation, Jan. 15, 1972, pp. 1-4, 4.3, 5.1.
Steingroever Dietrich
Steingroever Erich
Edmonds Warren S.
Mitchell, Jr. George H.
Strecker Gerard R.
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