Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1991-10-15
1993-10-12
Evans, F. L.
Optics: measuring and testing
By polarized light examination
With light attenuation
356376, 356381, 356385, G01B 1108
Patent
active
052530396
ABSTRACT:
In the size measurement of steel sections, a pair of two-dimensional rangefinders and a pair of one-dimensional rangefinders are arranged so as to sandwich a steel section consisting of a pair of flange portions and a web portion in a widthwise direction of the flange portion and face to each other, whereby a vertical distance ranging from the two-dimensional rangefinder to the flange portion and a vertical distance ranging from the one-dimensional rangefinder to the web portion are measured, respectively to calculate a deviation at center, a flange width and a web thickness from the above measured values. In this case, a laser rangefinder is used as each of the two-dimensional rangefinder and one-dimensional rangefinder.
REFERENCES:
patent: 3899663 (1975-08-01), Pirlet
patent: 4227812 (1980-10-01), Pirlet
patent: 4227813 (1980-10-01), Pirlet
Patent Abstracts of Japan, vol. 15, No. 005 (P-1149) Jan. 8, 1991, JP-A-2 254 304 (Sumimoto Metal Ind., Ltd.) Oct. 15, 1990.
Patent Abstracts of Japan, vol. 8, No. 183 (P-296) Aug. 23, 1984, JP-A-59 075 110 (Daido Tokushuko KK).
Patent Abstracts of Japan, vol. 5, No. 46 (P-54) Mar. 27, 1981, JP-A-56 001 305 (Sumimoto Metal Ind., Ltd.).
Patent Abstracts of Japan, Vo. 5, No. 17 (P-47) Jan. 31, 1981, JP-A-55 147 303 (Nireko KK).
Adachi Hidenobu
Baba Kazushi
Fujimoto Yoji
Fukutaka Yoshimi
Hatanaka Atsushi
Evans F. L.
Kawasaki Steel Corporation
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