Patents by Inventor Akihide Shiratsuki
Akihide Shiratsuki 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: 11472665Abstract: To provide an elevator car position detection sensor capable of suppressing erroneous detection of presence or absence of a plate. The elevator car position detection sensor includes a first coil provided to one of an elevator car and a hoistway and configured to output an excitation magnetic field to a plate provided to the other of the elevator car and the hoistway; a second coil provided on an opposite side of the first coil relative to the plate; a shield wall configured to shield an end portion of the plate located closer to one of the car and the hoistway; and a determination circuit configured to determine a phase of an alternating-current voltage corresponding to a frequency of the excitation magnetic field output from the first coil at an alternating-current voltage generated across the second coil.Type: GrantFiled: May 10, 2017Date of Patent: October 18, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Jin Inoue, Keita Mochizuki, Masahiro Ishikawa, Akihide Shiratsuki
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Patent number: 11345568Abstract: Provided is an apparatus configured to detect a car position by performing threshold processing on a voltage caused by an AC magnetic response through use of an identification plate in which a slit pattern is formed and a plurality of coils, the apparatus including a circuit configuration capable of switching between a normal operation for detecting the car position based on an on/off detection operation using the plurality of coils and a self-diagnosis operation capable of verifying the on/off detection operation irrespective of the presence or absence of the identification plate with a car in a stopped state by forcedly applying a magnetic field to the coils.Type: GrantFiled: March 15, 2016Date of Patent: May 31, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Jin Inoue, Akihide Shiratsuki, Keita Mochizuki, Masahiro Ishikawa
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Patent number: 11319187Abstract: An elevator car position detection device is provided capable of preventing erroneous detection of a metal object other than an object to be detected. The elevator car position detection device includes: an object to be detected provided in one of a hoistway and a car of an elevator, the object to be detected being formed of a magnetic body and having a slit-like opening; and a magnetic detection device provided in the other of the hoistway and the car of the elevator, the magnetic detection device being configured to detect a change in magnetic flux density according to the slit-like opening when facing the object to be detected.Type: GrantFiled: May 10, 2017Date of Patent: May 3, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Keita Mochizuki, Jin Inoue, Masahiro Ishikawa, Akihide Shiratsuki
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Publication number: 20210354954Abstract: An elevator car position detection device is provided capable of preventing erroneous detection of a metal object other than an object to be detected. The elevator car position detection device includes: an object to be detected provided in one of a hoistway and a car of an elevator, the object to be detected being formed of a magnetic body and having a slit-like opening; and a magnetic detection device provided in the other of the hoistway and the car of the elevator, the magnetic detection device being configured to detect a change in magnetic flux density according to the slit-like opening when facing the object to be detected.Type: ApplicationFiled: May 10, 2017Publication date: November 18, 2021Applicant: Mitsubishi Electric CorporationInventors: Keita MOCHIZUKI, Jin INOUE, Masahiro ISHIKAWA, Akihide SHIRATSUKI
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Patent number: 10955565Abstract: Provided are a radiation measurement device and method that allow stable radiation measurement as compared with the prior art. The radiation measurement device includes a radiation detection unit 1 having a scintillator, an optical transmission member 21 for transmitting an optical signal generated in the radiation detection unit, and a signal processing unit 3 for calculating a radiation dose from the optical signal transmitted. The signal processing unit includes a compensation unit 7 for obtaining an optical transmission loss amount from a change in wavelength spectrum in the optical signal caused by radiation acting on the optical transmission member and performs compensation-control on the optical transmission loss amount, and outputs a compensated signal.Type: GrantFiled: December 18, 2017Date of Patent: March 23, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Masaki Taguchi, Masateru Hayashi, Tetsushi Azuma, Makoto Sasano, Akihide Shiratsuki
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Patent number: 10801999Abstract: In a rope damage diagnostic testing apparatus, an ultrasound applicator generates ultrasonic waves in a wire rope by making the wire rope vibrate due to magnetostriction effect. A detecting element detects changes in a state of propagation of the ultrasonic waves in the wire rope. An excitation coil and the detecting element are disposed in a parallelogram that has as a first opposite side length a length of a portion of the wire rope in which one of the outer layer strands makes one revolution around the wire rope, and that has as a second opposite side length a product of a diameter and number of the outer layer wires that are included in one of the outer layer strands.Type: GrantFiled: April 22, 2016Date of Patent: October 13, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Toyohiro Noguchi, Jin Inoue, Keita Mochizuki, Akihide Shiratsuki
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Publication number: 20200231407Abstract: To provide an elevator car position detection sensor capable of suppressing erroneous detection of presence or absence of a plate. The elevator car position detection sensor includes a first coil provided to one of an elevator car and a hoistway and configured to output an excitation magnetic field to a plate provided to the other of the elevator car and the hoistway; a second coil provided on an opposite side of the first coil relative to the plate; a shield wall configured to shield an end portion of the plate located closer to one of the car and the hoistway; and a determination circuit configured to determine a phase of an alternating-current voltage corresponding to a frequency of the excitation magnetic field output from the first coil at an alternating-current voltage generated across the second coil.Type: ApplicationFiled: May 10, 2017Publication date: July 23, 2020Applicant: Mitsubishi Electric CorporationInventors: Jin INOUE, Keita MOCHIZUKI, Masahiro ISHIKAWA, Akihide SHIRATSUKI
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Publication number: 20200225366Abstract: Provided are a radiation measurement device and method that allow stable radiation measurement as compared with the prior art. The radiation measurement device includes a radiation detection unit 1 having a scintillator, an optical transmission member 21 for transmitting an optical signal generated in the radiation detection unit, and a signal processing unit 3 for calculating a radiation dose from the optical signal transmitted. The signal processing unit includes a compensation unit 7 for obtaining an optical transmission loss amount from a change in wavelength spectrum in the optical signal caused by radiation acting on the optical transmission member and performs compensation-control on the optical transmission loss amount, and outputs a compensated signal.Type: ApplicationFiled: December 18, 2017Publication date: July 16, 2020Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Masaki TAGUCHI, Masateru HAYASHI, Tetsushi AZUMA, Makoto SASANO, Akihide SHIRATSUKI
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Publication number: 20200055695Abstract: Provided is an apparatus configured to detect a car position by performing threshold processing on a voltage caused by an AC magnetic response through use of an identification plate in which a slit pattern is formed and a plurality of coils, the apparatus including a circuit configuration capable of switching between a normal operation for detecting the car position based on an on/off detection operation using the plurality of coils and a self-diagnosis operation capable of verifying the on/off detection operation irrespective of the presence or absence of the identification plate with a car in a stopped state by forcedly applying a magnetic field to the coils.Type: ApplicationFiled: March 15, 2016Publication date: February 20, 2020Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Jin INOUE, Akihide SHIRATSUKI, Keita MOCHIZUKI
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Patent number: 10399817Abstract: In an elevator car position detection device, a magnetic field generator generates an eddy current magnetic field on an identification member, and a magnetic field detector detects the eddy current magnetic field generated on the identification member. The identification member includes a plurality of conductors which are continuously arranged along an ascending and descending direction of a car, and are relatively different in a plate thickness with respect to a skin depth of an eddy current generated by the magnetic field generator on the identification member. A shape of at least a part of a boundary between the adjacent conductors is a straight line or a curve tilted with respect to a direction orthogonal to the ascending and descending direction of the car.Type: GrantFiled: March 1, 2013Date of Patent: September 3, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Jin Inoue, Emiko Kurata, Yoshimasa Watanabe, Akihide Shiratsuki, Hiroshi Nishizawa, Hajime Nakajima, Masahiro Ishikawa
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Publication number: 20190086369Abstract: In a rope damage diagnostic testing apparatus, an ultrasound applicator generates ultrasonic waves in a wire rope by making the wire rope vibrate due to magnetostriction effect. A detecting element detects changes in a state of propagation of the ultrasonic waves in the wire rope. An excitation coil and the detecting element are disposed in a parallelogram that has as a first opposite side length a length of a portion of the wire rope in which one of the outer layer strands makes one revolution around the wire rope, and that has as a second opposite side length a product of a diameter and number of the outer layer wires that are included in one of the outer layer strands.Type: ApplicationFiled: April 22, 2016Publication date: March 21, 2019Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Toyohiro NOGUCHI, Jin INOUE, Keita MOCHIZUKI, Akihide SHIRATSUKI
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Patent number: 10144613Abstract: A detection subject body provided in a hoistway includes an ID sequence formed by arranging three or more types of segments having different magnetic properties in a movement direction of an elevating body. An eddy current type detection unit is provided on the elevating body to generate signals corresponding to the magnetic properties of the respective segments. An identification unit identifies the respective types of the segments on the basis of the signals from the detection unit, and outputs a time series signal in a different output condition depending on the type of each segment. A digital data conversion unit converts the time series signal into digital data on the basis of variations in the output condition of the time series signal from the identification unit. A position specification unit specifies the position of the elevating body on the basis of the digital data.Type: GrantFiled: May 21, 2014Date of Patent: December 4, 2018Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Keita Mochizuki, Jin Inoue, Akihide Shiratsuki, Hiroshi Taguchi, Masahiro Ishikawa
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Patent number: 10065833Abstract: In an elevator position detection apparatus, when a first diagnosis switch is closed, a diagnosis coil generates a first induced magnetic field, and when a second diagnosis switch is closed, the diagnosis coil generates a second induced magnetic field that is weaker than the first induced magnetic field. In a constant L output fault diagnosis mode in which the first induced magnetic field is generated, an output value of a measurement signal falls below a threshold regardless of whether or not a detection subject body is present in a detection region. In a constant H output fault diagnosis mode in which generation of both the first and the second induced magnetic fields is stopped, the output value of the measurement signal equals or exceeds the threshold regardless of whether or not the detection subject body is present in the detection region.Type: GrantFiled: May 30, 2014Date of Patent: September 4, 2018Assignee: Mitsubishi Electric CorporationInventors: Jin Inoue, Akihide Shiratsuki, Keita Mochizuki, Hiroshi Taguchi, Masahiro Ishikawa
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Publication number: 20170137257Abstract: A detection subject body provided in a hoistway includes an ID sequence formed by arranging three or more types of segments having different magnetic properties in a movement direction of an elevating body. An eddy current type detection unit is provided on the elevating body to generate signals corresponding to the magnetic properties of the respective segments. An identification unit identifies the respective types of the segments on the basis of the signals from the detection unit, and outputs a time series signal in a different output condition depending on the type of each segment. A digital data conversion unit converts the time series signal into digital data, on the basis of variations in the output condition of the time series signal from the identification unit. A position specification unit specifies the position of the elevating body on the basis of the digital data.Type: ApplicationFiled: May 21, 2014Publication date: May 18, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Keita MOCHIZUKI, Jin INOUE, Akihide SHIRATSUKI, Hiroshi TAGUCHI, Masahiro ISHIKAWA
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Publication number: 20170066625Abstract: A detection subject body includes a first detection subject plate provided with an ID sequence and a second detection subject plate provided with a clock sequence. A detector includes a first detection unit that outputs, as an ID signal, a time series signal that switches condition in a boundary position between a first property portion and a second property portion of the ID sequence when the ID sequence passes through a first detection region, and a second detection unit that outputs, as a clock signal, a time series signal that switches condition in a boundary position between a first property portion and a second property portion of the clock sequence when the clock sequence passes through a second detection region. A processing unit specifies a position of the elevating body by reading the condition of the ID signal in a position where the condition of the clock signal switches.Type: ApplicationFiled: November 27, 2014Publication date: March 9, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Akihide SHIRATSUKI, Keita MOCHIZUKI, Jin INOUE, Hiroshi TAGUCHI, Makito SEKI, Masahiro ISHIKAWA
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Publication number: 20170043976Abstract: In an elevator position detection apparatus, when a first diagnosis switch is closed, a diagnosis coil generates a first induced magnetic field, and when a second diagnosis switch is closed, the diagnosis coil generates a second induced magnetic field that is weaker than the first induced magnetic field. In a constant L output fault diagnosis mode in which the first induced magnetic field is generated, an output value of a measurement signal falls below a threshold regardless of whether or not a detection subject body is present in a detection region. In a constant H output fault diagnosis mode in which generation of both the first and the second induced magnetic fields is stopped, the output value of the measurement signal equals or exceeds the threshold regardless of whether or not the detection subject body is present in the detection region.Type: ApplicationFiled: May 30, 2014Publication date: February 16, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Jin INOUE, Akihide SHIRATSUKI, Keita MOCHIZUKI, Hiroshi TAGUCHI, Masahiro ISHIKAWA
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Publication number: 20150344266Abstract: In an elevator car position detection device, a magnetic field generator generates an eddy current magnetic field on an identification member, and a magnetic field detector detects the eddy current magnetic field generated on the identification member. The identification member includes a plurality of conductors which are continuously arranged along an ascending and descending direction of a car, and are relatively different in a plate thickness with respect to a skin depth of an eddy current generated by the magnetic field generator on the identification member. A shape of at least a part of a boundary between the adjacent conductors is a straight line or a curve tilted with respect to a direction orthogonal to the ascending and descending direction of the car.Type: ApplicationFiled: March 1, 2013Publication date: December 3, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Jin INOUE, Emiko KURATA, Yoshimasa WATANABE, Akihide SHIRATSUKI, Hiroshi NISHIZAWA, Hajime NAKAJIMA, Masahiro ISHIKAWA
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Patent number: 8115162Abstract: In a sliding door apparatus, a first entrance is opened and closed by a first door, and a second entrance that faces the first entrance is opened and closed by a second door. Imaging means that captures images across a space between the first entrance and the second entrance is disposed beside the space. An image processing and determining portion determines presence or absence of an obstruction inside the space based on image data from the imaging means.Type: GrantFiled: May 29, 2007Date of Patent: February 14, 2012Assignee: Mitsubishi Electric CorporationInventors: Masahiro Shikai, Akihide Shiratsuki, Kazuo Takashima, Hiroyuki Kawano, Takaharu Ueda, Toshio Masuda
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Patent number: 7614482Abstract: In an elevator apparatus, a pulley is provided in a hoistway. A rope that moves together with the movement of a car is wound around the pulley. Further, the pulley is provided with a pulley sensor for generating a signal according to the rotation of the pulley. The car is provided with a car speed sensor for directly detecting the speed of the car. A control panel is provided with: a first speed detecting portion for obtaining the speed of the car based on information from the pulley sensor; a second car speed detecting portion for obtaining the speed of the car based on information from the car speed sensor; and a determination portion for determining the presence/absence of slippage between the rope and the pulley by comparing the speeds of the car as respectively obtained by the first and second speed detecting portions.Type: GrantFiled: May 28, 2004Date of Patent: November 10, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiro Shikai, Akihide Shiratsuki, Tatsuo Matsuoka
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Patent number: 7588127Abstract: In an elevator apparatus, a guide rail has a plurality of unit rails that are vertically connected to each other. A car is provided with a rail joint detecting device mounted on the car, for detecting the presence/absence of a joint between each of the unit rails. The rail joint detecting device has a joint detecting portion for optically detecting the presence of the joint; and a joint determining portion for determining the presence/absence of the joint based on information from the joint detecting portion. Information on the presence/absence of the joint is outputted from the joint determining portion to a car position correcting circuit. In the car position correcting circuit, information on the position of the car is corrected based on the information on the presence/absence of the joint.Type: GrantFiled: May 28, 2004Date of Patent: September 15, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akihide Shiratsuki, Masahiro Shikai, Tatsuo Matsuoka