Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With coupling means
Patent
1991-04-05
1992-09-29
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With coupling means
324117R, 324245, 324247, 364483, G01R 1900, G01R 1908, G01R 33022
Patent
active
051516497
ABSTRACT:
Two groups of magnetic field transducers shielded from electric fields and at a known distance from each other are contained in a portable instrument. Each group consists of 3 magnetic field transducers each sensitive to the magnetic field at a single point but according to three orthogonal orientations. Rapid reading of the magnetic field values measured by all 6 coils allows evaluation of the current in a straight electrical conductor relatively near to the apparatus on the basis of the direction and amplitude of the magnetic field vectors measured at the position of each group of 3 coils. Assuming that the conductor under scrutiny is the dominant magnetic influence in the area, the determination of both current and distance of the conductor is exact within a wide range of distances between apparatus and conductor and within a large number of orientations of the apparatus with respect to the conductor because of internal computational compensations performed by a microprocessor.
REFERENCES:
patent: 4309659 (1982-01-01), Yoshii
patent: 4427943 (1984-01-01), Cloutier et al.
patent: 4438401 (1984-03-01), Iwamoto et al.
patent: 4542344 (1985-09-01), Darilek et al.
patent: 4672321 (1987-06-01), Howell
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