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US 4,060,761 AGranted
Tubular magnetic field sensor with means to rectify the sensed signal
AssigneeRockwell International Corporation
InventorMelvin H. Rhodes
Life of this patent
Estimating the term…
Abstract
A magnetic tube is periodically saturated in the circumferential direction such that voltages are induced, in circumferential windings, from flux along the length of the magnetic tube, produced by an external field, immediately before and immediately after each occurrence of saturation.
Claims1
Magnetic sensing apparatus comprising, in combination:
- a tubular length of magnetic material;
- a first winding wound from inside to outside the tubular material;
- a second winding wound around the circumference of the tubular material;
- excitation means for applying an excitation signal to one of said windings;
- a volt second integrator means, connected to said excitation means;
- logic means, connected to the excitation means and to said volt second integrator means, for providing control signals,
- rectifier means, including control input means, connected to the other of said windings;
- and
- means connecting said control signals of said logic means to said control input means of said rectifier means for controlling the operation thereof to provide output sense signals indicative of magnetic field strength and direction in the vicinity of said magnetic material.
6 more elements
Dependencies are inferred from the claim text.