Coordinate input device using Matteucci effect

Telegraphy – Systems – Position coordinate determination for writing

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32420713, G08C 2100

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active

052986896

ABSTRACT:
A magnetic detector for detecting a magnetism present in the vicinity of or close to a magnetic wire circumferentially magnetized therein and an electromagnet for generating an A.C. magnetic field on the basis of the magnitude of a Matteucci-effect voltage developed across the magnetic wire when the electromagnet approaches the magnetic wire. A coordinate input device for detecting proximity between the electromagnet and an array of a plurality of such magnetic wires arranged in X and Y directions when the electromagnet approaches the array. A magnetic image sensor for detecting an intensity distribution of a static magnetic field to be detected and present along a longitudinal direction of the wire on the basis of a detection voltage of the wire when a plurality of such electromagnets arranged along the longitudinal direction of the wire are sequentially excited one after another.

REFERENCES:
patent: 4772813 (1988-09-01), Mohri et al.
patent: 4810838 (1989-03-01), Ichinokawa et al.
IEEE Transactions on Magnetics, vol. 27, No. 6, Nov. 1991, New York, U.S., pp. 48-61-4863, K. Kimura et al., "Data Tablet Utilizing Matteucci Effect of Amorphous Magnetic Wire".
IEEE Transactions on Magnetics, vol. 26, No. 5, Sep. 1990, New York, U.S., pp. 1789-1791, K. Mohri et al., "Large Barkhausen and Matteucci Effects in FeCoSiB, FeCrSiB and FeNiSiB".
IEEE Transactions on Magnetics. vol. 11, No. 5, Sep. 1975, New York, U.S., pp. 1403-1404, P. E. Gise et al., "An Electrodeposited Cylindrical Magnetometer Sensor".
Elektor Electronics, vol. 12, No. 5, May 1986, Canterbury, GG, pp. 52-53, "Magnetic-Field Sensors".

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