Patents by Inventor Hironao YAMAJI
Hironao YAMAJI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11428647Abstract: There is provided a tubular body inner surface inspection apparatus that detects a defect existing on an inner surface of a tubular body, the apparatus including: a tubular body imaging apparatus including N (N?2) imaging units each including a laser light source that applies laser light, an optical element that reflects laser light applied from the laser light source in a circumferential direction of the inner surface of the tubular body, as annular laser light, an area camera that images a region of the inner surface of the tubular body where the annular laser light is applied, and thereby generates an annular beam image, and a linking member that links together and fixes the laser light source and the area camera, in which the imaging units are linked in series along a tube axial direction of the tubular body in such a manner that positions of the linking members in a plane orthogonal to a tube axis are different from each other; a movement apparatus that moves the tubular body imaging apparatus along theType: GrantFiled: July 30, 2018Date of Patent: August 30, 2022Assignee: NIPPON STEEL CORPORATIONInventors: Toshio Akagi, Hironao Yamaji, Takeo Nakata, Masaki Yamano
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Publication number: 20210208085Abstract: There is provided a tubular body inner surface inspection apparatus that detects a defect existing on an inner surface of a tubular body, the apparatus including: a tubular body imaging apparatus including N (N?2) imaging units each including a laser light source that applies laser light, an optical element that reflects laser light applied from the laser light source in a circumferential direction of the inner surface of the tubular body, as annular laser light, an area camera that images a region of the inner surface of the tubular body where the annular laser light is applied, and thereby generates an annular beam image, and a linking member that links together and fixes the laser light source and the area camera, in which the imaging units are linked in series along a tube axial direction of the tubular body in such a manner that positions of the linking members in a plane orthogonal to a tube axis are different from each other; a movement apparatus that moves the tubular body imaging apparatus along theType: ApplicationFiled: July 30, 2018Publication date: July 8, 2021Applicant: NIPPON STEEL CORPORATIONInventors: Toshio AKAGI, Hironao YAMAJI, Takeo NAKATA, Masaki YAMANO
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Publication number: 20210156681Abstract: [Object] To inspect the inner surface of a tubular body at higher speed, with higher resolving power, and in a simpler way regardless of the size of the tubular body. [Solution] A tubular body inner surface inspection method for detecting a defect existing on an inner surface of a tubular body includes: a tubular body imaging apparatus including an optical element that reflects laser light applied from a laser light source in a circumferential direction of the inner surface of the tubular body, as annular laser light, an area camera that images a region of the inner surface of the tubular body where the annular laser light is applied, and generates an annular beam image, and a linking member that links together and fixes the laser light source and the area camera; and an arithmetic processing apparatus performing image processing on a plurality of the generated annular beam images.Type: ApplicationFiled: May 31, 2018Publication date: May 27, 2021Applicant: NIPPON STEEL CORPORATIONInventors: Toshio AKAGI, Hironao YAMAJI, Takeo NAKATA, Masaki YAMANO
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Patent number: 10295335Abstract: [Object] To provide a shape measurement apparatus that, in measuring the unevenness shape of a measurement object by a light-section method, enables the shape of the measurement object to be measured precisely even when the distance between the measurement object and an image capturing apparatus fluctuates.Type: GrantFiled: April 22, 2016Date of Patent: May 21, 2019Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Jun Umemura, Hironao Yamaji
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Patent number: 10290113Abstract: [Object] To monitor, on a metallic body surface, a region that has a specific hue and a region that does not have the specific hue and has a surface whose roughness varies. [Solution] Included are: a measurement apparatus which includes a line sensor camera which is provided such that an optical axis of the line sensor camera is substantially parallel to a normal direction of a metallic body surface, and first, second, and third illumination light sources each configured to irradiate the metallic body surface with first, second, and third illumination light beams each having a strip shape, the measurement apparatus being configured to measure separately respective reflected light beams of the three illumination light beams that have been emitted; and an arithmetic processing apparatus configured to calculate surface state monitoring information on the basis of luminance values of the reflected light beams.Type: GrantFiled: April 8, 2016Date of Patent: May 14, 2019Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Toshio Akagi, Yusuke Konno, Hironao Yamaji, Jun Umemura
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Publication number: 20180174316Abstract: [Object] To monitor, on a metallic body surface, a region that has a specific hue and a region that does not have the specific hue and has a surface whose roughness varies. [Solution] Included are: a measurement apparatus which includes a line sensor camera which is provided such that an optical axis of the line sensor camera is substantially parallel to a normal direction of a metallic body surface, and first, second, and third illumination light sources each configured to irradiate the metallic body surface with first, second, and third illumination light beams each having a strip shape, the measurement apparatus being configured to measure separately respective reflected light beams of the three illumination light beams that have been emitted; and an arithmetic processing apparatus configured to calculate surface state monitoring information on the basis of luminance values of the reflected light beams.Type: ApplicationFiled: April 8, 2016Publication date: June 21, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Toshio AKAGI, Yusuke KONNO, Hironao YAMAJI, Jun UMEMURA
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Patent number: 9970750Abstract: [Object] To perform shape inspection of a metallic body in a simple way at higher speed with higher density. [Solution] An apparatus of the present invention includes: a measurement apparatus configured to irradiate a metallic body with at least two illumination light beams, and measure reflected light separately; and an arithmetic processing apparatus configured to calculate information used for shape inspection of the metallic body on the basis of measurement results. The measurement apparatus includes a plurality of illumination light sources configured to emit strip-shaped illumination light having different peak wavelengths, and a plurality of monochrome line sensor cameras that have band-pass filters and are aligned vertically above a surface of the metallic body and set to capture images of the same portion of the metallic body by their respective shift lenses, the number of the monochrome line sensor cameras being the same as the number of the peak wavelengths of the emitted illumination light.Type: GrantFiled: May 24, 2016Date of Patent: May 15, 2018Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Toshio Akagi, Yusuke Konno, Hironao Yamaji, Jun Umemura
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Publication number: 20180106607Abstract: [Object] To provide a shape measurement apparatus that, in measuring the unevenness shape of a measurement object by a light-section method, enables the shape of the measurement object to be measured precisely even when the distance between the measurement object and an image capturing apparatus fluctuates.Type: ApplicationFiled: April 22, 2016Publication date: April 19, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Jun UMEMURA, Hironao YAMAJI
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Publication number: 20180087898Abstract: [Object] To perform shape inspection of a metallic body in a simple way at higher speed with higher density. [Solution] An apparatus of the present invention includes: a measurement apparatus configured to irradiate a metallic body with at least two illumination light beams, and measure reflected light separately; and an arithmetic processing apparatus configured to calculate information used for shape inspection of the metallic body on the basis of measurement results. The measurement apparatus includes a plurality of illumination light sources configured to emit strip-shaped illumination light having different peak wavelengths, and a plurality of monochrome line sensor cameras that have band-pass filters and are aligned vertically above a surface of the metallic body and set to capture images of the same portion of the metallic body by their respective shift lenses, the number of the monochrome line sensor cameras being the same as the number of the peak wavelengths of the emitted illumination light.Type: ApplicationFiled: May 24, 2016Publication date: March 29, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Toshio AKAGI, Yusuke KONNO, Hironao YAMAJI, Jun UMEMURA
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Patent number: 9903710Abstract: To inspect the shape of a metallic body further accurately, regardless of surface roughness of the metallic body. A shape inspection apparatus for a metallic body according to the present invention includes: a measurement apparatus configured to irradiate a metallic body with at least two illumination light beams, and measure reflected light of the two illumination light beams from the metallic body separately; and an arithmetic processing apparatus configured to calculate information used for shape inspection of the metallic body on the basis of luminance values of the reflected light. The measurement apparatus includes a first illumination light source and a second illumination light source configured to irradiate the metallic body with strip-shaped illumination light having mutually different peak wavelengths, and a color line sensor camera configured to measure reflected light of first illumination light and reflected light of second illumination light, separately.Type: GrantFiled: June 1, 2016Date of Patent: February 27, 2018Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Yusuke Konno, Toshio Akagi, Hironao Yamaji, Jun Umemura
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Publication number: 20170276476Abstract: To inspect the shape of a metallic body further accurately, regardless of surface roughness of the metallic body. A shape inspection apparatus for a metallic body according to the present invention includes: a measurement apparatus configured to irradiate a metallic body with at least two illumination light beams, and measure reflected light of the two illumination light beams from the metallic body separately; and an arithmetic processing apparatus configured to calculate information used for shape inspection of the metallic body on the basis of luminance values of the reflected light. The measurement apparatus includes a first illumination light source and a second illumination light source configured to irradiate the metallic body with strip-shaped illumination light having mutually different peak wavelengths, and a color line sensor camera configured to measure reflected light of first illumination light and reflected light of second illumination light, separately.Type: ApplicationFiled: June 1, 2016Publication date: September 28, 2017Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Yusuke KONNO, Toshio AKAGI, Hironao YAMAJI, Jun UMEMURA