Method and device for measuring wall thickness of a pipe in...

Details Method and device for measuring wall thickness of a pipe in... Method and device for measuring wall thickness of a pipe in...

2006-10-03

2006-10-03

Lauchman, Layla G. (Department: 2877)

Optics: measuring and testing

By light interference

For dimensional measurement

C356S503000, C073S655000, C073S597000

Reexamination Certificate

active

07116428

ABSTRACT:
A method and device for measuring the wall thickness of a pipe in a pipe-rolling mill wherein a Fabry-Pérot interfero-meter has its mirror spacing set by providing an input to a linear activity for one of the mirrors from a controller receiving an input from a photodiode at the output side of the interferometer. A second control circuit regulates the amplification of that photodiode with at least one parameter derived from the rolling system, for example, the input optical signal to the interferometer or a disturbance value representing for example the temperature of the rolled product and obtained through an optical pyrometer. The incoming optical signal may be tapped to another photodiode also with a variable amplification amplifier and both amplifiers may be controlled by a second controller.

REFERENCES:
patent: 4659224 (1987-04-01), Monchalin
patent: 4966459 (1990-10-01), Monchalin
patent: 5137361 (1992-08-01), Heon et al.
patent: 5286313 (1994-02-01), Schultz et al.
patent: 6078397 (2000-06-01), Monchalin et al.
patent: 0 940 193 (1999-09-01), None
patent: 00/63641 (2000-10-01), None

Affiliated with

Also associated with

Rating

Method and device for measuring wall thickness of a pipe in... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and device for measuring wall thickness of a pipe in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for measuring wall thickness of a pipe in... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3636782