Method of magnetic field measurement including convolution steps

Details Method of magnetic field measurement including convolution steps Method of magnetic field measurement including convolution steps

1991-09-05

1993-04-20

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Magnetometers

1286531, 505846, G01R 33022, G01R 33035

Patent

active

052046249

ABSTRACT:
A plurality of magnetic flux measurement data corresponding to two dimensional grids are obtained, then the magnetic flux measurement data are convoluted to sampling unit functions in x-direction and y-direction to obtain an interpolation function. Magnetic field is illustrated by isomagnetic contour lines based on magnetic flux measurement data and interpolation values which are obtained based on the interpolation function. One of the sampling unit functions is replaced with a differential function thereof to obtain partial differential values of arbitrary points.

REFERENCES:
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patent: 4977896 (1990-12-01), Robinson et al.
Thomas et al, "High Resolution Single Channel Neuromagnetometry and Minimal Approach for Multichannel Systems", Cryogenics, vol. 28, No. 11, Guilford GB, pp. 783-795 (Nov. 1988).
Roth et al, "Using a Magnetometer to Image a Two-Dimensional Current Distribution", Journal of Applied Physics, vol. 65, No. 1, New York, U.S., pp. 361-372; (Jan. 1989).
Roth et al, "Apodized Pickup Coils for Improved Spatial Resolution of SQUID Magnetometers", Review of Scientific Instruments, vol. 61, No. 9, New York, U.S., pp. 2439-2448 (Sep. 1990).
Voorde et al, "High-Resolution magnetic Mapping of PR-interval Phenomena of Normal Subjects", Medical and Biological Engineering and Computing, vol. 26, No. 2, Stevenage GB, pp. 130-135 (Mar. 1988).

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