Non-contact sensing system for determining the relative elongati

Details Non-contact sensing system for determining the relative elongati Non-contact sensing system for determining the relative elongati

1984-10-05

1987-06-30

Krass, Errol A.

Boots, shoes, and leggings

364472, 364552, 324 61R, G01B 708, G06F 1546, G06G 748, G01R 2726

Patent

active

046775781

ABSTRACT:
A system for measuring the relative elongation of portions of a moving steel strip. A number of capacitive sensors positioned above one surface of the moving strip monitor the distance between each sensor and the surface of the strip. This information is processed through a geometrical relationship to calculate the percent relative elongation at one sensing position with respect to another. The calculation may be performed instantaneously, or result from several measurements averaged over a cell length. Provision is made for greater accuracy in cases where waviness of the strip results in the occurrence of more than a predetermined number of waves during a cell length. Wave steepness, wave periodicity, and categorization of relative length information are also provided by the processing.

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