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: 7578373Abstract: 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. A rope sensor for measuring the movement speed of the rope is provided in the hoistway. 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 speed detecting portion for obtaining the speed of the car based on information from the rope 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: August 25, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akihide Shiratsuki, Masahiro Shikai, Tatsuo Matsuoka
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Patent number: 7577279Abstract: An identity verification apparatus includes a light source for applying light that can pass through an object to be detected and having a fingerprints to the object to be detected, an image pickup unit for picking up light emitted from the light source and passing through projections of the fingerprint and light emitted from the light source and passing through depressions of the fingerprint, and for generating a fingerprint image including dark portions corresponding to the projections and bright portions corresponding to the depressions, and a signal processing unit for image processing the fingerprint image generated by the image pickup unit to generate fingerprint information, and for verifying an identity based on the fingerprint information.Type: GrantFiled: March 8, 2004Date of Patent: August 18, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Emiko Sano, Akihide Shiratsuki, Masahiro Shikai, Hajime Nakajima
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Patent number: 7574023Abstract: A fingerprint image pickup device includes a light source that emits a light for transmission through a fingertip portion having a fingerprint to be photographed, an image pickup unit that picks up the light from the light source and transmitted through the subject to acquire a fingerprint image in which convex and concave parts of the fingerprint are dark and bright, respectively, and an optical system that images the light transmitted through the fingertip portion on the image pickup unit. The optical system is arranged so that a distal side of the fingertip portion is tilted, at a predetermined angle, farther away from the optical system than an opposite side, with reference to a position at which a ventral side of the fingertip portion contacts a face orthogonal to an optical axis of the optical system.Type: GrantFiled: September 30, 2005Date of Patent: August 11, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Emiko Sano, Masahiro Shikai, Akihide Shiratsuki, Toshiro Nakashima, Takahiro Nakamura
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Publication number: 20090108987Abstract: 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: ApplicationFiled: May 29, 2007Publication date: April 30, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Masahiro Shikai, Akihide Shiratsuki, Kazuo Takashima, Hiroyuki Kawano, Takaharu Ueda, Toshio Masuda
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Publication number: 20080190710Abstract: 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. A rope sensor for measuring the movement speed of the rope is provided in the hoistway. 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 speed detecting portion for obtaining the speed of the car based on information from the rope 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: ApplicationFiled: May 28, 2004Publication date: August 14, 2008Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Akihide Shiratsuki, Masahiro Shikai, Tatsuo Matsuoka
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Publication number: 20070062763Abstract: 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: ApplicationFiled: May 28, 2004Publication date: March 22, 2007Inventors: Akihide Shiratsuki, Masahiro Shikai, Tatsuo Matsuoka
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Publication number: 20070000736Abstract: 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: ApplicationFiled: May 28, 2004Publication date: January 4, 2007Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Masahiro Shikai, Akihide Shiratsuki, Tatsuo Matsuoka
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Publication number: 20060072796Abstract: A fingerprint image pickup device includes a light source that emits a light for transmission through a fingertip portion having a fingerprint to be photographed, an image pickup unit that picks up the light from the light source and transmitted through the subject to acquire a fingerprint image in which convex and concave parts of the fingerprint are dark and bright, respectively, and an optical system that images the light transmitted through the fingertip portion on the image pickup unit. The optical system is arranged so that a distal side of the fingertip portion is tilted at a predetermined angle, farther away from the optical system thank an opposite sides with reference to a position at which a ventral side of the fingertip portion contacts a face orthogonal to an optical axis of the optical system.Type: ApplicationFiled: September 30, 2005Publication date: April 6, 2006Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Emiko Sano, Masahiro Shikai, Akihide Shiratsuki, Toshiro Nakashima, Takahiro Nakamura
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Publication number: 20060072795Abstract: A fingerprint image pickup device includes a light source that emits light for transmission through a fingertip portion having a fingerprint to be photographed, an image pickup unit that picks up the light from the light source and transmitted through the fingertip portion and acquires a fingerprint image in which a convex part of the fingerprint is dark and a concave part of the fingerprint is bright, and an optical system that images the light transmitted through the fingertip portion from the light source on the image pickup unit. The light from the light source illuminates a portion other than a nail of the fingertip portion, and the light has a center of illumination on a center line, in a width direction of a face where the nail of the fingertip portions is present, and on a skin side of a border of the nail and skin of the fingertip portion.Type: ApplicationFiled: September 30, 2005Publication date: April 6, 2006Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Emiko Sano, Masahiro Shikai, Akihide Shiratsuki, Toshiro Nakashima
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Patent number: 6972834Abstract: An optical distance sensor includes a first substrate provided with a light emitting element and a light detecting element, a one-piece optical structure body on a second substrate, the optical structure body having optical elements for converging incident light in a direction parallel to a surface of the second substrate and for converging an outgoing light beam from the light emitting element and a light beam reflected by an object in the direction parallel to the surface of the second substrate, and lenses for converging incident light in a direction perpendicular to the surface of the second substrate and for converging the outgoing light beam from the light emitting element and the light beam reflected by the object in the direction perpendicular to the surface of the second substrate, respectively.Type: GrantFiled: December 11, 2000Date of Patent: December 6, 2005Assignees: Mitsubishi Denki Kabushiki Kaisha, Forschungszentrum Karlsruhe GmbHInventors: Toru Oka, Hajime Nakajima, Masahiro Shikai, Akihide Shiratsuki, Jurgen Mohr, Ulrike Wallrabe, Uwe Hollenbach
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Patent number: 6846116Abstract: A sensor head includes a first substrate provided with a light emitting element and a light detecting element, a one-piece optical structure body on a second substrate, the optical structure body having optical elements for converging incident light in a direction parallel to a surface of the second substrate and for converging an outgoing beam from the light emitting element and a light beam reflected by an object in the direction parallel to the surface of the second substrate, and lenses for converging incident light in a direction perpendicular to the surface of the second substrate and for converging the outgoing beam from the light emitting element and the light beam reflected by the object in the direction perpendicular to the surface of the second substrate, respectively.Type: GrantFiled: December 11, 2000Date of Patent: January 25, 2005Assignees: Mitsubishi Denki Kabushiki Kaisha, Forschungszentrum Karlsruhe GmbHInventors: Toru Oka, Hajime Nakajima, Masahiro Shikai, Akihide Shiratsuki, Jurgen Mohr, Ulrike Wallrabe, Uwe Hollenbach
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Publication number: 20040179723Abstract: An identity verification apparatus includes a light source for applying light that can pass through an object to be detected having a fingerprint to the object to be detected, an image pickup unit for picking up both light emitted out of the light source and passing through projections of the fingerprint and light emitted out of the light source and passing through depressions of the fingerprint, and for generating a fingerprint image including dark portions corresponding to the projections and bright portions corresponding to the depressions, and a signal processing unit for performing image processing on the fingerprint image generated by the image pickup unit so as to generate fingerprint information, and for verifying an identity based on the fingerprint information.Type: ApplicationFiled: March 8, 2004Publication date: September 16, 2004Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Emiko Sano, Akihide Shiratsuki, Masahiro Shikai, Hajime Nakajima
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Patent number: 6657185Abstract: An irregular pattern detector includes a first optical system, a transparent light guide body and a second optical system. The first optical system has a light source. The transparent light guide body has an incident face receiving incident light from the light source of the first optical system, a detection face facing the incident face for placing of a subject having an irregular pattern, a curved surface reflecting scattered light from the detection face, an optical absorbing face facing the curved surface and having an opening outputting light reflected from the curved surface. The second optical system, such as an imaging lens, guides the light from the opening of the optical absorbing face of the transparent light guide body to a camera device. This irregular pattern detector can be scaled down, and can produced precise images without any deformation.Type: GrantFiled: November 29, 2000Date of Patent: December 2, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akihide Shiratsuki, Masahiro Shikai, Hajime Nakajima
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Publication number: 20030007752Abstract: A sensor head includes a first substrate provided with a light emitting element and a light receiving element, an optical structure body formed in one piece on a second substrate, the optical structure body having a plurality of optical elements intended for converging incident light in a parallel direction to a surface of the second substrate, for converging an outgoing beam from the light emitting element and a light beam reflected by an object to be measured in the parallel direction to the surface of the second substrate, and lenses intended for converging incident light in a perpendicular direction to the surface of the second substrate, for converging the outgoing beam from the light emitting element and the light beam reflected by the object to be measured in the perpendicular direction to the surface of the second substrate, respectively.Type: ApplicationFiled: August 1, 2002Publication date: January 9, 2003Inventors: Toru Oka, Hajime Nakajima, Masahiro Shikai, Akihide Shiratsuki, Jurgen Mohr, Ulrike Wallrabe, Uwe Hollenbach
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Publication number: 20010005004Abstract: An irregular pattern detector includes a first optical system, a transparent light guide body and a second optical system. The first optical system has a light source. The transparent light guide body has an incident face receiving an incident light from the light source of the first optical system, a detection face provided to face the incident face and for placing a subject having an irregular pattern thereon, a curved surface reflecting scattering light from the detection face, an optical absorbing face provided to face the curved surface and having an opening part outputting the reflection light from the curved surface. The second optical system such as an imaging lens guides the light from the opening part of the optical absorbing face of the transparent light guide body to a camera device. This irregular pattern detector can be scaled down, and can obtain precise images without any deformation.Type: ApplicationFiled: November 29, 2000Publication date: June 28, 2001Inventors: Akihide Shiratsuki, Masahiro Shikai, Hajime Nakajiama