Patent ID: 6288538
Filing Date: 2001-09-11
Classification: G01B,G07D

Abstract:
A surface profile detecting device comprising:a plurality of bar-like cores disposed in a line with predetermined intervals in a predetermined disposing direction orthogonal to the direction of movement of an object to be measured, each having bar-like core tip ends that are arranged on a single plane and which directly face a surface of said object to be measured having an uneven profile comprising recesses and protrusions which are affected by a magnetic field generated by a plurality of adjacent supporting cores wherein supporting core tip ends are disposed in the same direction as the bar-like core tip ends; and wherein said supporting cores are wound around with an exciting coil for creating said magnetic field wherein said supporting core tip ends directly face the surface of said object and said supporting cores are integrally formed with said bar-like cores wherein said supporting core tip ends and said bar-like core tip ends of each integrally formed supporting core and bar-like core are only arranged in the direction of the relative movement of said object; anda plurality of signal detection circuits, each signal detection circuit connected with a magenetic detector wherein each of said signal detection circuits is connected to an A/D converter:said magnetic detector provided with each of said bar-like cores for detecting changes in magnetic flux generated due to said uneven profile of said object to be measured;said A/D converter for A/D converting an output of each of said signal detection circuits with a predetermined timing; anda memory for storing an output from said A/D converter, said uneven profile of said object to be measured in a predetermined range being detected from the data stored in said memory.