Kawasaki Steel Corporation

Yuichiro Asano

Atsushi Momose

Motoji Shiozumi

Akira Torao

Takayuki Yanagimoto

Akira Hirahashi

Tadashi Yabe

Kunio Kurita

Yoshihisa Kono

Susumu Moriya

Suehisa Ohga

Yoshiaki Shibata

Hitoshi Aizawa

Kunio Takahashi

Taira Suzuki

Akiro Torao

In one aspect of the invention, the sample surface is wetted with an aqueous solution of a fluorescent dye followed by rinses with water to remove an excessive amount of the dye so that the background fluorescence emission can be minimized to increase the efficiency of fingerprint detection. In another aspect, the fluorescent dye or a reagent to produce fluorescent substance is deposited on the sample surface by attaching a gelatinous film impregnated with a solution thereof followed by peeling. In a further different aspect, a powdery fluorescent dye is deposited on to the sample surface followed by spraying of water to wash away an excessive amount of the powdery dye so that the background fluorescence can be minimized. The invention also provides an apparatus for the fingerprint detection by the laser beam excitation of fluorescence, which is compact and portable as being composed of an ingenious combination of several units into an integral system.

Method for detecting fingerprints using a laser and an apparatus therefor

A method and apparatus classifies and grades glossiness based on the visible feeling by the light reflection intensity distribution of a surface of a body, wherein specular reflection intensities and total reflection intensities are detected for two known light fluxes projected at predetermined incident angles. The specular reflection intensities and the total reflection intensities are processed, to thereby determine the glossiness of the work to be measured.

Method of and apparatus for determining glossiness of surface of a body

A seam locating system includes a laser beam scanning means for scanning a laser beam through a plurality of circumferentially aligned scanning points. The system includes means for forming a pattern image of reflected laser beam at each scanning points and means for forming a single-frame video image of the pattern image for each scanning point. A video signal processing circuit selects one or more scanning lines suitable for locating irregularities in the angle of reflection of the laser beam, for locating the scanning line in each frame with the maximum width over which the luminosity of the video signal is higher than a given threshold, for deriving a threshold value to be compared with the maximum width of each frame and for deriving the center position of the seam based on the comparison of the maximum width of each frame and the threshold value and the address of each frame, which address is indicative of the circumferential position of the corresponding scanning point. The seam locating system set forth above is not influenced by scale or the like which reflect the laser beam irregularly but with high luminosity by suitably selecting the scanning lines in each frame of video data. The seam locating system may further include means for feedback controlling the laser beam scanning means relative to the derived center position of the welded seam. Furthermore, the seam locating system according to the invention is applicable to seam-welded pipe annealing for automatically positioning the anneal device over the seam or for flaw detection in the welded seam.

Method and system for locating and inspecting seam weld in metal

In one aspect of the invention, the sample surface is wetted with an aqueous solution of a fluorescent dye followed by rinses with water to remove an excessive amount of the dye so that the background fluorescence emission can be minimized to increase the efficiency of fingerprint detection. In another aspect, the fluorescent dye or a reagent to produce fluorescent substance is deposited on the sample surface by attaching a gelatin film impregnated with a solution thereof followed by peeling. In a further different aspect, a powdery fluorescent dye is deposited on to the sample surface followed by spraying of water after removing an excessive amount of the powdery dye so that the background fluorescence can be minimized. The invention also provides an apparatus for the fingerprint detection by the laser beam excitation of fluorescence, which is compact and portable as being composed of an ingenious combination of several units into an integral system.

The invention relates to a method for determining the shape in a plane to be determined in atmosphere of scattering materials. The method includes comprising the steps of irradiating light on a first line to be determined being imagined on the plane to be determined in the atmosphere of scattering materials to extract a first picture signal at the time of picking up the first line to be determined; at the same time, irradiating light on a second line to be determined being imagined at a position with a prescribed distance apart from the first line to be determined to extract a second picture signal at the time of picking up the second line to be determined; then, subtracting the second picture signal from the first picture signal to extract a fresh picture signal; and operating two-dimensional position coordinates of a first image of line to be determined on the picture in which the first line to be determined has been picked up on the basis of the fresh picture signal to extract three-dimensional position coordinates of the first line to be determined in the plane to be determined through coordinate conversion of the two-dimensional position coordinates. Further, the invention relates to a system in which the scattering materials are cleared away by jetting gas into the atmosphere of scatttering materials prior to picking up of the lines to be determined.

Method and system for determining shape in plane to be determined in

The invention relates to a method for determining the shape in a plane to be determined in atmosphere of scattering materials. The method includes the steps of irradiating light on a first line to be determined being imagined on the plane to be determined in the atmosphere of scattering materials to extract a first picture signal at the time of picking up the first line to be determined; at the same time, irradiating light on a second line to be determined being imagined at a position with a prescribed distance apart from the first line to be determined to extract a second picture signal at the time of picking up the second line to be determined; then, subtracting the second picture signal from the first picture signal to extract a fresh picture signal; and operating two-dimensional position coordinates of a first image of line to be determined on the picture in which the first line to be determined has been picked up on the basis of the fresh picture signal to extract three-dimensional position coordinates of the first line to be determined in the plane to be determined through coordinate conversion of the two-dimensional position coordinates. Further, the invention relates to a system in which the scattering materials are cleared away by jetting gas into the atmosphere of scattering materials prior to picking up of the lines to be determined.

Growing community of inventors

Chiba, Japan

Yuichiro Asano