Television – Special applications – Hazardous or inaccessible
Patent
1995-04-14
1998-01-27
Chin, Tommy P.
Television
Special applications
Hazardous or inaccessible
348 85, H04N 718, H04N 947
Patent
active
057126771
ABSTRACT:
The apparatus for video inspection of the interior surface of tubular goods, includes: an elongated mounting plate having a first and a second end; a first compartment at the first end of the mounting plate which has a light transmissive window facing the second end of the mounting plate; a second compartment at the second end of the mounting plate which has a light diffusing window facing the first end of the mounting plate; a video camera having a wide angle lens in the first compartment; a light source in said second compartment; a first prism disposed in front of said lens; and, external means for monitoring and recording camera output.
The wide angle lens in combination with the first prism provides for a dual field of view, part of which is transmitted through the first prism for viewing a small circumferential area opposite the inclined side of the first prism, and, part of which constitutes a peripheral view of nearly the entire circumference, "C", of the tubular received directly by the lens. Light reflecting from nearly the entire circumference, "C", of the tubular provides means for general inspection of large areas of the tubular for suspected defects, "D". Light transmitted through the prism provides a means for close inspection of suspected defects, "D", and movement of the prism closer to the lens provides for greater magnification thereof. Light from the light source may be diverted through a second prism to provide greater illumination and shadowing of suspected defects, "D", in the magnified area.
REFERENCES:
patent: 2632801 (1953-03-01), Donaldson
patent: 2849530 (1958-08-01), Fleet
patent: 3279085 (1966-10-01), Reinhart
patent: 3586872 (1971-06-01), Tien
patent: 3837827 (1974-09-01), Carruthers et al.
patent: 3855547 (1974-12-01), Kirk
patent: 4027946 (1977-06-01), Tsai
patent: 4152045 (1979-05-01), Hammer
patent: 4255762 (1981-03-01), Takeyasu et al.
patent: 4532545 (1985-07-01), Hanson
patent: 4823187 (1989-04-01), Toyama et al.
patent: 4899921 (1990-02-01), Bendat et al.
patent: 4914289 (1990-04-01), Nguyen et al.
patent: 5008043 (1991-04-01), Robello et al.
patent: 5140319 (1992-08-01), Riordan
patent: 5402165 (1995-03-01), Linville et al.
patent: 5432600 (1995-07-01), Grollimund et al.
patent: 5434669 (1995-07-01), Tabata et al.
patent: 5444567 (1995-08-01), Kataoka
Fraering George C.
Fraering Phillip G.
Fraering, Jr. Camille M.
Chin Tommy P.
Lee Y.
LandOfFree
Apparatus for video inspection of the interior surface of tubula 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 video inspection of the interior surface of tubula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for video inspection of the interior surface of tubula will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-346048