Patents by Inventor Kayoko Kawata
Kayoko Kawata 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: 9494558Abstract: Noise included in detection signals is distinguished with a simple configuration. Provided is a flaw-detection apparatus (1) including a flaw-detection sensor group (11) in which two flaw-detection sensors (11a and 11b) are arranged substantially in one row in a scanning direction with a distance therebetween and a processing device (15) that detects a defect in an inspection object on the basis of detection signals detected by the individual flaw-detection sensors (11a and 11b), wherein, with regard to the detection signals detected by the flaw-detection sensors (11a and 11b), when signal values detected at substantially a same positional coordinate in the scanning direction are not similar to each other, and, additionally, when signal values measured at a same time are similar to each other, the processing device (15) determines that the detection signals are not defect signals.Type: GrantFiled: October 25, 2010Date of Patent: November 15, 2016Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kayoko Kawata, Masaaki Kurokawa, Masayoshi Higashi, Masaya Takatsugu, Yoshihiro Asada
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Patent number: 9207211Abstract: An object is to improve the precision of estimating a blockage ratio or a deposited-scale thickness. In a deposit measurement apparatus that estimates a blockage ratio of a gap between a wall surface of a through-hole and an outer surface of a heat-conducting pipe or the thickness of a deposit deposited at the gap, an eddy-current flaw detection probe (61) acquires an eddy-current flaw detection signal by scanning inside the heat-conducting pipe with a sensor; and a processing device (62) estimates the blockage ratio at the gap or the thickness of the deposit deposited at the gap by using the eddy-current flaw detection signal for the gap of the pipe-supporting-plate protrusion in the through-hole.Type: GrantFiled: November 10, 2011Date of Patent: December 8, 2015Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kayoko Kawata, Yuko Yamamoto, Masaaki Kurokawa, Masaharu Michihashi, Naoto Kawase
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Patent number: 9121601Abstract: An insertion-hole blockage-rate evaluation system is applied to a heat exchanger that includes a heat transfer tube and a tube support plate having an insertion hole formed therein for inserting the heat transfer tube therethrough. The tube support plate is displayed in a three dimensional manner in an elliptical diagram with a ratio between a long axis and a short axis being in a range from 1.0 to 2.0 inclusive, each of the tube support plates is serially arranged so as not to overlap on each other, and the insertion-hole blockage-rate evaluation system includes an imaging process of color-coding and displaying the diagram displayed in the three-dimensional elliptical shape according to a value of a blockage rate of the insertion hole acquired by checking the blockage rate of the insertion hole.Type: GrantFiled: March 23, 2012Date of Patent: September 1, 2015Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yuji Kohashi, Naoto Kawase, Kayoko Kawata, Takashi Inagaki, Masaharu Michihashi
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Patent number: 8779762Abstract: An inspection device that is capable of inspecting all heat-transfer-tube sealing portions in a steam generator and that is also capable of analyzing a defect shape is provided. An inspection device that employs the eddy-current flaw detection method to inspect the presence/absence of a defect in a welded portion (103) between a tube (101) and a tube plate (102) is provided with a main unit (41) that has a circular-column portion (41A), which is inserted into the tube (101), and a flange portion (41B), which is pressed against the tube plate (102), and that is rotatable with respect to the welded portion (103); a probe (42) that is disposed inside the main unit (41), that can be moved close to and away from the welded portion (103), and that detects a defect in the welded portion (103); and a pressing portion (44) that presses the probe (42) toward the welded portion.Type: GrantFiled: September 2, 2010Date of Patent: July 15, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Masayoshi Higashi, Masaaki Kurokawa, Kayoko Kawata
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Publication number: 20130101153Abstract: An insertion-hole blockage-rate evaluation system is applied to a heat exchanger that includes a heat transfer tube and a tube support plate having an insertion hole formed therein for inserting the heat transfer tube therethrough. The tube support plate is displayed in a three dimensional manner in an elliptical diagram with a ratio between a long axis and a short axis being in a range from 1.0 to 2.0 inclusive, each of the tube support plates is serially arranged so as not to overlap on each other, and the insertion-hole blockage-rate evaluation system includes an imaging process of color-coding and displaying the diagram displayed in the three-dimensional elliptical shape according to a value of a blockage rate of the insertion hole acquired by checking the blockage rate of the insertion hole.Type: ApplicationFiled: March 23, 2012Publication date: April 25, 2013Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yuji KOHASHI, Naoto KAWASE, Kayoko KAWATA, Takashi INAGAKI, Masaharu MICHIHASHI
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Publication number: 20120179402Abstract: An object is to improve the precision of estimating a blockage ratio or a deposited-scale thickness. In a deposit measurement apparatus that estimates a blockage ratio of a gap between a wall surface of a through-hole and an outer surface of a heat-conducting pipe or the thickness of a deposit deposited at the gap, an eddy-current flaw detection probe (61) acquires an eddy-current flaw detection signal by scanning inside the heat-conducting pipe with a sensor; and a processing device (62) estimates the blockage ratio at the gap or the thickness of the deposit deposited at the gap by using the eddy-current flaw detection signal for the gap of the pipe-supporting-plate protrusion in the through-hole.Type: ApplicationFiled: November 10, 2011Publication date: July 12, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kayoko Kawata, Yuko Yamamoto, Masaaki Kurokawa, Masaharu Michihashi, Naoto Kawase
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Publication number: 20120123699Abstract: Noise included in detection signals is distinguished with a simple configuration. Provided is a flaw-detection apparatus (1) including a flaw-detection sensor group (11) in which two flaw-detection sensors (11a and 11b) are arranged substantially in one row in a scanning direction with a distance therebetween and a processing device (15) that detects a defect in an inspection object on the basis of detection signals detected by the individual flaw-detection sensors (11a and 11b), wherein, with regard to the detection signals detected by the flaw-detection sensors (11a and 11b), when signal values detected at substantially a same positional coordinate in the scanning direction are not similar to each other, and, additionally, when signal values measured at a same time are similar to each other, the processing device (15) determines that the detection signals are not defect signals.Type: ApplicationFiled: October 25, 2010Publication date: May 17, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kayoko Kawata, Masaaki Kurokawa, Masayoshi Higashi, Masaya Takatsugu, Yoshihiro Asada
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Publication number: 20120119733Abstract: An inspection device that is capable of inspecting all heat-transfer-tube sealing portions in a steam generator and that is also capable of analyzing a defect shape is provided. An inspection device that employs the eddy-current flaw detection method to inspect the presence/absence of a defect in a welded portion (103) between a tube (101) and a tube plate (102) is provided with a main unit (41) that has a circular-column portion (41A), which is inserted into the tube (101), and a flange portion (41B), which is pressed against the tube plate (102), and that is rotatable with respect to the welded portion (103); a probe (42) that is disposed inside the main unit (41), that can be moved close to and away from the welded portion (103), and that detects a defect in the welded portion (103); and a pressing portion (44) that presses the probe (42) toward the welded portion.Type: ApplicationFiled: September 2, 2010Publication date: May 17, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Masayoshi Higashi, Masaaki Kurokawa, Kayoko Kawata
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Patent number: 6424151Abstract: A method for evaluation of an eddy current testing signal is provided. The method includes the steps of generating a feature amount based on a sample eddy current testing signal obtained by measuring a standard specimen, the feature amount including a feature highly correlated to a secondary factor which is other than a depth of the flaw and which affects the waveform of the signal; generating an evaluation parameter by using the feature amount, the evaluation parameter being a parameter for outputting a value with a sufficiently small error relative to correct answer data on the sample eddy current testing signal; and estimating the depth of a flaw, expressed by an actual measurement eddy current testing signal, by use of the evaluation parameter.Type: GrantFiled: January 9, 2001Date of Patent: July 23, 2002Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kayoko Kawata, Masaaki Kurokawa, Yoshihiro Asada
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Patent number: 6370485Abstract: A signal processing apparatus includes a 2-dimensional conversion processing section, a 2-dimensional emphasis and attenuation processing section and a 2-dimensional smoothing processing section. The 2-dimensional conversion processing section maps an observation signal in a first coordinate system onto a second coordinate system to output a 2-dimensional converted signal. The observation signal includes a detection object component and a noise component to be attenuated. The noise component is composed of a first noise component and a second noise component. The 2-dimensional emphasis and attenuation processing section attenuates the first noise component to emphasize the detection object component and outputs a 2-dimensional filtered signal in which the detection object component is emphasized.Type: GrantFiled: August 4, 1999Date of Patent: April 9, 2002Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kayoko Kawata, Shintaro Kumano, Mitsuyoshi Matsumoto
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Publication number: 20020003421Abstract: A method for evaluation of an eddy current testing signal is provided. The method includes the steps of generating a feature amount based on a sample eddy current testing signal obtained by measuring a standard specimen, the feature amount including a feature highly correlated to a secondary factor which is other than a depth of the flaw and which affects the waveform of the signal; generating an evaluation parameter by using the feature amount, the evaluation parameter being a parameter for outputting a value with a sufficiently small error relative to correct answer data on the sample eddy current testing signal; and estimating the depth of a flaw, expressed by an actual measurement eddy current testing signal, by use of the evaluation parameter.Type: ApplicationFiled: January 9, 2001Publication date: January 10, 2002Inventors: Kayoko Kawata, Masaaki Kurokawa, Yoshihiro Asada