Multi-coil impedance

Details Multi-coil impedance Multi-coil impedance

1995-04-28

1996-01-30

Trammell, James P.

Boots, shoes, and leggings

32420711, 32420715, 364482, G01B 714

Patent

active

054885663

ABSTRACT:
Disclosed is a method of designing a position sensor having a plurality of coils so that the total impedance of the sensor varies according to a desired impedance function. The method includes the steps of modelling the position sensor on a computer using a finite element analysis program to determine the vector potential and current density within the sensor due to a known current flowing in each of the coils. A set of matrix equations is then developed that relates vector potential, the current density and the number of turns, N.sub.i, in each coil to a point on the desired impedance function. The set of matrix equations is then optimized to determine the number of turns, N.sub.i, that each coil should contain, so that the total impedance of the sensor varies according to the desired impedance function.

REFERENCES:
patent: 4282485 (1981-08-01), Pauwels et al.
patent: 4623840 (1986-11-01), Fujimura et al.
patent: 4926123 (1990-05-01), Redlich
patent: 5061896 (1991-10-01), Schmidt
patent: 5107195 (1992-04-01), Lyons et al.

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