Method for measuring the field pattern of electrical or magnetic

Details Method for measuring the field pattern of electrical or magnetic Method for measuring the field pattern of electrical or magnetic

1991-02-11

1992-08-04

Wieder, Kenneth A.

Electricity: measuring and testing

Magnetic

Magnetometers

1286531, 324 72, 324248, 324301, 36457102, 364581, G01R 33022

Patent

active

051362422

ABSTRACT:
A method for measuring the field pattern of electrical or magnetic fields using a sensor arrangement, for determining the spatial position of a biological power source is disclosed which compensates for background activity. The method includes the steps of measuring the background activity at a time before the biological power source is stimulated, and the resultant signal vector of the background activity is formed. This signal vector of the background activity is vectorially subtracted from each resultant vector of the subsequently obtained values from the biological power source, so that a signal vector is obtained which is essentially caused only by the current from the power source. A weighting factor, which varies the length of the vector of the background field, is iteratively calculated together with the source parameters for the biological power source by error minimization, so that the parameters of the power source can be optimally portrayed.

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Patent Abstracts of Japan, vol. 9, No. 86 (P-349) for Japanese Application 59-216077.

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