LENGTH MEASURING DEVICE FOR STEEL PANEL

PURPOSE:To measure the length of a moving steel panel in a non-contact state by simple constitution. CONSTITUTION:Magnetizing electromagnets 12A,12B are provided in the moving direction of a steel panel 1 so as to provide a distance L0 between the electromagnets and a pulse of a constant cycle is si...

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Bibliographic Details
Main Author IWASAKI MITSUYOSHI
Format Patent
LanguageEnglish
Published 07.06.1994
Edition5
Subjects
MEASURING
MEASURING ANGLES
MEASURING AREAS
MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS
PHYSICS
TESTING
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Summary:PURPOSE:To measure the length of a moving steel panel in a non-contact state by simple constitution. CONSTITUTION:Magnetizing electromagnets 12A,12B are provided in the moving direction of a steel panel 1 so as to provide a distance L0 between the electromagnets and a pulse of a constant cycle is simultaneously supplied to the electromagnets by a magnetizing pulse generator 11 to magnetize the steel panel 11 with magnetic poles A, B in a non-contact state. A magnetic detector (Hall element) 15 detecting the magnetic poles A, B in a non-contact state is provided on the downstream side of the electromagnets and the detection pulses PA, PB thereof are inputted to counters 20, 21 to count the reference pulse CL between the detection pulses PA, PB and PB, PA and the moving length and speed of the steel panel 1 are calculated from the count values of the counters 20, 21 on the basis of the distance L0 between the electromagnets 12A, 12B by an operation device 22.
Bibliography:Application Number: JP19920312535