Apparatus for measuring wear in the lining of refractory furnace

Optics: measuring and testing – By polarized light examination – With light attenuation

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

356381, G01B 1102, F27D 116

Patent

active

051277360

ABSTRACT:
A continuous wave laser light beam is directed at the refractory lining within a furnace vessel, and the displacement as measured by a self-scanned linear array of the scattered light beam from a nominal or reference position measured to provide an indication of lining wear or damage. The video signal received by the linear array receiver provides information for mapping the worn or damaged areas of the vessel lining so that such areas may be repaired by a gunning spray nozzle. The inspection apparatus includes an optical filter which is temperature controlled to prevent wavelength shifts away from the nominal laser wavelength. The electronic processing circuitry includes a voltage controlled oscillator responsive to the average background level for modifying the scan rate of the linear array to compensate for changes in background level. The threshold against which the reflected laser beam video signal is compared is also a function of background level. Consequently, the system is self-compensating for changes in background radiation temperature. The apparatus may be lowered into a hot furnace vessel following each heat without the need to cool the furnace vessel. The inspection apparatus is mechanically scanned vertically and angularly within the vessel to provide a large number of inspection data points.

REFERENCES:
patent: 2982856 (1961-05-01), Camp
patent: 3187185 (1965-06-01), Milnes
patent: 4053234 (1977-10-01), McFarlane
patent: 4093991 (1978-06-01), Christie et al.
patent: 4107244 (1978-08-01), Ochiai et al.
patent: 4113384 (1978-09-01), Lauer et al.
patent: 4218989 (1980-08-01), Fujita et al.
patent: 4227802 (1980-10-01), Scholdstrom
patent: 4233513 (1980-11-01), Elder et al.
patent: 4248532 (1981-02-01), Nosler
patent: 4248809 (1981-02-01), Sakai et al.
patent: 4301998 (1981-11-01), Rodway
patent: 4331975 (1982-05-01), Krawza et al.
patent: 4373804 (1983-02-01), Pryor et al.
patent: 4373805 (1983-02-01), Mallinson
patent: 4453083 (1984-06-01), Bohlander et al.
patent: 4708482 (1987-11-01), Neiheisel
"AGA IMS 1600 Measuring System-System Description", (no date).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for measuring wear in the lining of refractory furnace does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for measuring wear in the lining of refractory furnace, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for measuring wear in the lining of refractory furnace will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1825771

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.