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1. 发明专利

JPH06324005A METHOD FOR DETECTING ROLLING FLAW OF STEEL PLATE 失效
公开(公告)号：JPH06324005A
公开(公告)日：1994-11-25
申请号：JP11182293
申请日：1993-05-13
申请人： NIPPON STEEL CORP
发明人： CHIKASAWA FUMIICHIRO , MAEDA KENTARO , MORI TOSHIHIRO
IPC分类号： B21B15/00 , B21C51/00 , G01B11/30 , G01N21/88 , G01N21/89 , G01N21/892
摘要： PURPOSE:To detect a roll flaw based on the presence position of the peak of added data by storing shade data of a screen for one rotation of a final roll continuously for a plurality of screens and then adding the data in width direction for each picture element in the longitudinal direction of each screen. CONSTITUTION:The image of the surface of a steel plate 1 is picked up for a plurality of screens continuously by a CCD camera 2 for detecting flaw for each length equivalent to one rotation of a final rolling and then image data are stored in an image memory 3. After the image of an entire screen is picked up, filltering treatment is performed for each screen and then the image data in the width direction of a plate are added for each picture element in the longitudinal direction of the plate. It is performed for each screen and the result is added. Only the roll flaw part appears as a peak by addition and a noise part is suppressed by superposing many screens, thus increasing S/N ratio.

2. 发明专利

JPH06308052A FLAW DETECTION METHOD FOR ROLLED STEEL PLATE 失效
公开(公告)号：JPH06308052A
公开(公告)日：1994-11-04
申请号：JP9980593
申请日：1993-04-26
申请人： NIPPON STEEL CORP
发明人： FUJITA TAMIO , CHIKASAWA FUMIICHIRO , MAEDA KENTARO , MORI TOSHIHIRO
IPC分类号： G01B11/30 , G01N21/88 , G01N21/89 , G01N21/892 , G06T1/00 , G06F15/62 , G06F15/64
摘要： PURPOSE:To improve detection accuracy in flaw detection in width direction position by taking advantage of roll flaw having a pitch accompanied by the rolling in the case of detecting an original point flaw in a whole wide image of the steel plate and magnifying the flaw part for monitoring. CONSTITUTION:A picture with a whole width of the plate and length corresponding to one rotation of a roll is first photographed with a total monitoring camera 1 and from this image data, roll flaw is detected. Then, a small region including the position the roll flaw exists, is magnified and photographed with a flaw part monitoring camera 2 to rolled steel plate.

3. 发明专利

JP2002226862A METHOD FOR OBSERVING AND REPAIRING COMBUSTION CHAMBER OF COKE OVEN 失效
公开(公告)号：JP2002226862A
公开(公告)日：2002-08-14
申请号：JP2001031163
申请日：2001-02-07
申请人： NITTETSU YAHATA ENG KK , NIPPON STEEL CORP
发明人： MORI TOSHIHIRO , TODAKA KAZUNORI , TAWARA SHINICHIRO
IPC分类号： G01N21/954 , C10B29/06
摘要： PROBLEM TO BE SOLVED: To provide a method for observing and repairing the combustion chamber of a coke oven, by which a proper repair can be carried out in response to a joint breakage or a crack to enable the improvement of the repair efficiency, the reduction in the cost of the repair and the elongation of the life of an observing and repairing device. SOLUTION: This method for observing and repairing the combustion chamber of the coke oven is characterized by inserting an observation lance 13 into the combustion chamber 12 of the coke oven to image the inner wall surface 12a of the combustion chamber 12 with the observation lance 13, displaying the obtained image of a defective portion on a monitor 25 as a still picture, inserting a repair lance 14 into the combustion chamber 12 down to the position of the defective portion of the wall surface 12a, and then operating the repair lance 14 to spray a refractory material on the defective portion, while overlapping the sprayed track on the defective portion image of the monitor 25 to completely coat the defective portion image with the sprayed track.

4. 发明专利

JPH0814843A MEASUREMENT METHOD FOR EDGE WINDING SHAPE 失效
公开(公告)号：JPH0814843A
公开(公告)日：1996-01-19
申请号：JP14345794
申请日：1994-06-24
申请人： NIPPON STEEL CORP
发明人： MORI TOSHIHIRO , MURAMOTO KANJI , YANAGITAKE TETSUYA , MIHARA NOBUHIRO
IPC分类号： G01B11/24 , G01B11/245
摘要： PURPOSE:To eliminate the formation of the abnormal condition of reflected light due to irregular winding, and a flaw on mirror surface and an edge, and form a profile of high precision by concurrently measuring a reflected light position and reflection energy via laser beam scanning. CONSTITUTION:This displacement gauge 1 of trigonometrical range type has a laser light source 3 with an irradiation lens 2, a reflected light intensity measurement mechanism 6 with a light receiving lens 4 and a photo detection element 5, and a reflected light position measurement mechanism 9 with a light receiving lens 7 and a photo detection element 8. Furthermore, measurement data from respective mechanisms 6 and 9 is operated in an arithmetic operation circuit 10 and outputted as both displacement output and laser beam receiving level. In other words, a reflected light position and reflection energy through laser beam scanning are concurrently measured, and the shape of a laser beam irradiated section is obtained on the basis of both measurement values. In this case, the displacement of the laser beam receiving position and the intensity of the beam are compared with the preset values, thereby correcting the displacement output and providing an accurate coil surface profile.

5. 发明专利

JPH0666536A METHOD FOR MEASURING BURR SHAPE AND DIMENSIONS GENERATED ON PLATE SHEAR 失效
公开(公告)号：JPH0666536A
公开(公告)日：1994-03-08
申请号：JP24580492
申请日：1992-08-21
申请人： SERUTETSUKU SYST KK , NIPPON STEEL CORP
发明人： OGASAWARA AKINOBU , KUNINAGA MANABU , MORI TOSHIHIRO , OTA SHOZO
IPC分类号： G01B11/02 , G01B11/24 , G01B11/245
摘要： PURPOSE:To obtain a method for measuring the shape and dimensions of a small burr which is generated on plate shear which can be measured speedily and accurately without any contact. CONSTITUTION:For measuring the shape and dimensions of a burr which is generated on plate shear, laser beams are oscillated from a laser beam transmitter 12, the laser beams are applied to a plate edge 19 to be measured via a scanning means 14, and then the reflection laser beams from the plate edge 19 are received by a position detection type light receiver 13 via the scanning means 14. Data from the position detection type light receiver 13 is processed, thus indexing the shape and dimensions of the burr which is formed at the plate edge 19.

6. 发明专利

JPH05123749A METHOD FOR DETECTING RAW SPEED IN TANDEM ROLLING MILL 失效
公开(公告)号：JPH05123749A
公开(公告)日：1993-05-21
申请号：JP31740291
申请日：1991-11-06
申请人： NIPPON STEEL CORP
发明人： TANIGUCHI HIROSHI , MORI TOSHIHIRO , HIRAYAMA SHINICHI
IPC分类号： B21B37/00 , B21B37/46 , B21C51/00 , G01P3/36 , G01P21/00 , G01P21/02
摘要： PURPOSE:To embody a high accuracy of the plate thickness by a tandem rolling mill composed of plural stands. CONSTITUTION:Plate thickness gages 82-85 and plate speed maters 72-75 are arranged at the inlet and outlet sides of all stands 1-3 of the rolling mill, and a standard plate speed meter is attached at the inlet side of rolling mill. The plate speed correcting operation is constructed in the controlling calculator 90, 91. The plate velocity meter 72 is corrected with the standard plate velocity meter at the inlet side of the rolling mill. About the plate velocity maters 73-75 behind the outlet side of the 1st stand, they are corrected orderly based on the up stream side correct finished plate speed gages 72-74.

7. 发明专利

JPH0894333A METHOD FOR DETECTING SCRATCH OF STEEL PLATE 失效
公开(公告)号：JPH0894333A
公开(公告)日：1996-04-12
申请号：JP22485194
申请日：1994-09-20
申请人： NIPPON STEEL CORP
发明人： FUJITA TAMIO , MAEDA KENTARO , MORI TOSHIHIRO , KUBOTA MITSUTOSHI
IPC分类号： G01B11/24 , G01N21/89 , G01N21/892
摘要： PURPOSE: To carry out an online detect of a scratch in the cold rolling process by eliminating water drop which maker an extremely large disturbance in signal processing. CONSTITUTION: The image of a plate being rolled is picked up by a camera so that the image partially overlaps in the previous and later images to obtain a plurality of image signals, positions Qn and Qn-1 of an abnormally bright or dark point on the substrate are detected based on the image signal, the position of the abnormally bright or dark point is compensated by the traveling distance Dn and Dn-1 of the plate between the image pick-up intervals and is compared with the position of the abnormally bright or dark point of adjacent images, and then it is judged that the point is a scratch and water drop when it is located at the same position and is not at the same position, respectively.

8. 发明专利

JPH06294759A DETECTION METHOD FOR ROLL TRANSFER FLAW IN ROLLING PROCESS 失效
公开(公告)号：JPH06294759A
公开(公告)日：1994-10-21
申请号：JP8363693
申请日：1993-04-09
申请人： NIPPON STEEL CORP
发明人： MORI TOSHIHIRO , KUBOTA MITSUTOSHI , MAEDA KENTARO
IPC分类号： G01B11/00 , G01N21/88 , G01N21/89 , G01N21/892 , G01N21/952
摘要： PURPOSE:To make online decision of a roll transfer flaw by storing the gray level data of the image on the surface of a steel plate continuously into a memory means, detecting a high contrast image part through image processing, an operating the positional relationship of the flaw on the image based on the speed of a steel plate being stored or by actual measurement. CONSTITUTION:The gray level data on the surface of a steel plate 1 picked up by means of a camera 3 is stored continuously into a memory means by an amount corresponding to a plurality of screens at a time. Each pixel row in the longitudinal direction of the steel plate is then subjected to shading correction for each screen thus suppressing the fluctuation in the light emission from a strobe 2 and the pattern in the longitudinal direction. An image processor 4 then detects a high contrast part on the image. An operating unit 5 operates the positional relationship of flaws for the entire image based on the speed of steel plate prestored at the time of image acquisition or by actual measurement, and the roll transfer flaw is decided based on the periodicity thereof.

9. 发明专利

JPH06288934A METHOD FOR DETECTING EDGE DEFECT OF HOT-ROLLED SHEET STEEL 失效
公开(公告)号：JPH06288934A
公开(公告)日：1994-10-18
申请号：JP7836593
申请日：1993-04-05
申请人： NIPPON STEEL CORP
发明人： KUNINAGA MANABU , MORI TOSHIHIRO
IPC分类号： G01B11/30 , G01N21/89 , G01N21/892 , G06T1/00 , G06T5/00 , G06F15/62 , G06F15/68
摘要： PURPOSE:To detect the edge defect of a self-luminous sheet steel by correcting the threshold of the luminance level of the sheet steel by using the luminance level of scattered light existing in a non-luminous section. CONSTITUTION:The image of the luminance level at the edge section of a hot-rolled sheet steel 1 is picked up 3 by dividing the level into 256 gradations by correcting the stop value of a camera in accordance with the luminance level of the steel 1. Then the threshold of the luminance level of the steel 1 is set based on the luminance level obtained in advance from the previously picked up image of a defectless part and the edge section of the steel 1 in Yi line is detected from picture elements X9 exceeding the gradation of the luminance level A by scanning image pickup data. At the time of scanning Y2 line, another threshold C is set by correcting the mean value B of the luminance levels of five picture elements, namely, those X2-X6 on the Y1 line by adding the threshold B to the threshold A from a position which is two-picture elements deviated from the picture element X9 towards the dark part. Thereafter, the position of the picture element X2 is scanned from the dark part side by using the position of the picture element X2 as the scan starting position of the Y2 line in the X direction. When the luminance level of the element X2 is lower than the threshold C, the part X9 is judged as an edge section. When the luminance level of the element X2 is higher than the threshold C, the element X2 indicates a steel part 1. By repeating the above-mentioned operations until the Y256 line and operating 4 recessed amounts, edge crack sections are judged.

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