Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1996-09-25
1998-05-26
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetometers
33361, 324247, 324258, G01R 3302, G01C 1728
Patent
active
057571848
ABSTRACT:
A magnetic detection apparatus is disclosed, the size and cost of which can easily be reduced and with which excellent sensitivity can be obtained. The magnetic detection apparatus according to the present invention has a magnetic sensor formed by winding a coil around a magnetic member, wherein change in a response waveform of an electric current allowed to flow in the coil of the magnetic sensor occurring when time-varying voltage is applied to the coil is detected. Since the response waveform of the electric current allowed to flow in the coil is changed in accordance with the intensity of an external magnetic field, the external magnetic field can be detected.
REFERENCES:
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patent: 4403515 (1983-09-01), Iwasaki
patent: 4728888 (1988-03-01), Bauer et al.
patent: 4851775 (1989-07-01), Kim et al.
patent: 5233294 (1993-08-01), Dreoni
patent: 5239264 (1993-08-01), Hawks
Aizawa Manabu
Kurihara Kazuo
Sony Corporation
Strecker Gerard R.
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