METHOD OF PRODUCING STEEL STRIP MATERIAL INVOLVING OBTAINING A PROFILE OR OTHER CHARACTERISTIC INDICATING QUALITY OF A COIL OF STEEL STRIP MATERIAL AND CONTINUOUS TESTING APPARATUS FOR DETERMINING THE MAGNETIC CHARACTERISTICS OF A STRIP OF MOVING MATERIAL INCLUDING A METHOD OF OBTAINING A PROFILE INDICATIVE OF THE QUALITY OF THE STRIP THROUGHOUT ITS ENTIRE LENGTH AND FLUX INDUCING AND PICK UP DEVICE THEREFOR AND CONTINUOUS TESTING APPARATUS FOR DETERMINING THE MAGNETIC CHARACTERISTICS OF A MOVING WORKPIECE

摘要

Continuous testing apparatus for determining the magnetic characteristics of a strip of moving material including a flux inducing and pick-up device to induce a quantity of flux into the material and dual voltage output producing coils for producing different voltages from material having the same magnetic permeability, and circuit means coupled with the dual coils to produce an output voltage which is a characteristic of the ratio of the voltage produced by one of the coils and the difference between the voltages produced by both of the coils. The invention also includes the method of obtaining a profile of the coil of the material throughout the entire length thereof.