System for measuring the velocity, displacement and strain on a

Details System for measuring the velocity, displacement and strain on a System for measuring the velocity, displacement and strain on a

1998-09-17

2000-09-12

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

33732, 324206, 250223R, 2502081, 356 32, G01B 704

Patent

active

061181323

ABSTRACT:
The present invention is generally directed to a system and method for calculating the velocity, displacement and/or strain of a moving surface or web of material. ("Surface or web" is hereafter referred to simply as "web".) In accordance with one aspect of the invention, a system is provided having a first photosensor array disposed near the web of material and a second photosensor array disposed near the web of material, wherein the second photosensor array is spaced a distance "d" from the first photosensor array. A processing unit is coupled to both the first photosensor array and the second photosensor array and is configured to control or carry out functional operations and computations associated with the system. In accordance with one embodiment of the present invention, the processing unit is controlled in steps to: (1) detect a pattern on the web of material at the first photosensor array; (2) evaluate a second image pattern taken at the second photosensor array at a predetermined time t2; and (3) compare this position of this second image pattern with that of the first image pattern to compute an offset. In accordance with an alternative embodiment, items (2) and (3) above may be changed to: (2) recognize the detected pattern on the web of material at the second photosensor array; and (3) calculate the strain on the web of material, based on the velocity v of the web of material, the predetermined distance "d" separating the photosensor arrays, and an elapsed time between the detection of the pattern in response to the first step segment and the recognition of the pattern in response to the second step segment.

REFERENCES:
patent: 4198758 (1980-04-01), Eineichner et al.
patent: 4274783 (1981-06-01), Eineichner et al.
patent: 4400882 (1983-08-01), Thornton
patent: 5089712 (1992-02-01), Holland
patent: 5149980 (1992-09-01), Ertel et al.
patent: 5291131 (1994-03-01), Suzuki et al.
patent: 5567976 (1996-10-01), Dierschke et al.
patent: 5578813 (1996-11-01), Allen et al.
patent: 5644139 (1997-07-01), Allen et al.
patent: 5686720 (1997-11-01), Tullis
patent: 5699161 (1997-12-01), Woodworth
patent: 5703353 (1997-12-01), Blalock et al.
patent: 5729008 (1998-03-01), Blalock et al.
patent: 5753908 (1998-05-01), Christensen

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