Patents by Inventor Shigeo Yoshida
Shigeo Yoshida 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: 8116914Abstract: A pitch controller, uninterruptible power supply, and rotational speed detector are disposed in the rotor in a wind turbine. When a slip ring failure or wire breakage occurs, the pitch controller internally creates a pitch angle command so as to control the pitch angle.Type: GrantFiled: August 20, 2007Date of Patent: February 14, 2012Assignees: Hitachi, Ltd., Fuji Heavy Industries Ltd.Inventors: Shinya Oohara, Masaya Ichinose, Motoo Futami, Kazuya Tsutsumi, Takashi Shiraishi, Shigeo Yoshida, Hajime Komiyama, Junichi Sugino
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Publication number: 20110299998Abstract: This horizontal axis wind turbine comprises a plurality of yaw motors that are provided on one of either a nacelle or a tower, and a gear 2 that is provided on the other of either the nacelle or the tower and that engages with the drive gears 4m, 4n of the plurality of yaw motors, such that when the plurality of yaw motors stop the rotation of the nacelle, some of the yaw motors are stopped and held by yaw motor brakes, then after a delay, the other yaw motors are stopped and held by yaw motor brakes. When the other yaw motors are stopped, the drive gears 4m of the some yaw motors and the drive gears 4n of the other yaw motors hold the gear 2 by pressing against the gear 2 in opposite directions of rotation.Type: ApplicationFiled: June 3, 2011Publication date: December 8, 2011Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventor: Shigeo Yoshida
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Publication number: 20110299986Abstract: The object of the invention is to provide a control apparatus C of a horizontal axis wind turbine apparatus WTG that calculates the value en of a pitch angle command for each blade based on the rate of change ?D of the azimuth angle ? of a Nacelle N and the rotor azimuth angle ? of the blades B1, B2 and B3, causes the rotor to generate torque around the yaw axis by periodically controlling the angle change of the pitch angle of the blades, and using that torque, controls the rate of change of the azimuth angle of the nacelle. The value of that angle change is calculated as a value that increases as the inputted value of the rate of change ?D increases.Type: ApplicationFiled: June 3, 2011Publication date: December 8, 2011Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventor: Shigeo Yoshida
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Publication number: 20110140445Abstract: An offshore wind turbine is comprised of a tower structure body configured with a tower and foundation, a rotor supported at the tower top, a power generator generating electricity by the rotation of the rotor, and a power converter converting electricity from the generator. A cavity is formed in the tower and foundation, and an internal space configured therewith is divided into upper and lower chambers by a bulkhead with first and second air vents between or in either of the tower and foundation. The converter is disposed in the upper chamber. An air circulating channel and air blower (e.g., air exhaust fan) are provided wherein air is circulated from the converter to the lower chamber through the first air vent, then to the converter through the second air vent. An air inlet is disposed at a lower level of an air outlet, or a partition member is provided therebetween.Type: ApplicationFiled: November 4, 2010Publication date: June 16, 2011Applicant: Fuji Jukogyo Kabushiki KaishaInventor: Shigeo Yoshida
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Patent number: 7924940Abstract: A communication network system sets communication parameters which enable an operation under a maximum possible communication rate in a situation where a transmission path has cyclic noise/impedance fluctuations. A transmission/reception apparatus 100 transmits training packets for checking the state of the power line at two distinct points in time. A transmission/reception apparatus analyzes SNR at each carrier frequency, and stores an SNR evaluation result. The transmission/reception apparatus compares two SNR evaluation results which are obtained through two instances of a channel estimation algorithm, selects an SNR evaluation result which dictates a faster PHY rate, and transmits it to the transmission/reception apparatus. The transmission/reception apparatus changes modulation/demodulation rules based on the received SNR analytical result.Type: GrantFiled: July 17, 2009Date of Patent: April 12, 2011Assignee: Panasonic CorporationInventors: Akio Kurobe, Shigeo Yoshida, Tomohiro Kimura, Yuji Igata, Masahiro Maki, Toshiyuki Wakisaka, Hisao Koga, Mutsuhiko Oishi
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Patent number: 7916654Abstract: A communication terminal which modulates and demodulates a packet for transmission and reception based on a communication parameter for modulation and demodulation determined according to a communication-medium characteristic. The communication terminal includes: an extracting unit which extracts, during every occurrence of a predetermined cycle, information indicative of either one of transmission efficiency and reception quality of the packet as an information element; a calculating unit which calculates a difference between a first information element extracted by the extracting unit and a second information element previously extracted by the extracting unit; and detecting-scheme performance determining unit which determines, based on the difference between the first information element and the second information element whether a scheme of detecting the communication-medium characteristic is to be performed.Type: GrantFiled: December 12, 2006Date of Patent: March 29, 2011Assignee: Panasonic CorporationInventors: Youhei Koide, Tohru Yasukawa, Shigeo Yoshida, Shinichiro Ohmi
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Patent number: 7870783Abstract: The present invention provides a method for measuring the turbulence intensity of a horizontal axis wind turbine that is capable of accurately obtaining the value of the turbulence intensity without the effect of the rotor and by taking into consideration the motion of the nacelle. In the method for measuring the turbulence intensity of a horizontal axis wind turbine, with the nacelle located on the upwind side of the rotor of the horizontal axis wind turbine, measurement values are obtained from an anemometer that is located on the nacelle and an acceleration sensor that is fastened to the nacelle, and the absolute value of the turbulence intensity is calculated based on the measurement values from the anemometer and the measurement values from the acceleration sensor. As a result, it is possible to accurately calculate the absolute value of the turbulence intensity that includes the effect of the movement of the nacelle.Type: GrantFiled: March 27, 2009Date of Patent: January 18, 2011Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Shigeo Yoshida, Soichiro Kiyoki
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Patent number: 7851771Abstract: Petunia explants are irradiated with heavy-ion beams, and the chimeric individuals differentiated from the explants are selected (FSRP method). Then, explants are obtained from the chimeric individuals and subjected to tissue culture, followed by selection of re-differentiated chimeric individuals with stable characters (SSRP method). By these procedures, it becomes possible to create chimeric plants such as variegated petunia efficiently.Type: GrantFiled: July 23, 2002Date of Patent: December 14, 2010Assignee: RikenInventors: Shigeo Yoshida, Tomoko Abe, Yasushige Yano, Nobuhisa Fukunishi, Ken-ichi Suzuki
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Publication number: 20100296932Abstract: The object of the invention is to construct a horizontal-axis wind turbine comprising a dual-system pitch drive unit for one blade that is independent up to the transmission mechanism or a dual-system yaw drive unit for one wind turbine nacelle that is independent up to the transmission mechanism, and to provide the dual system with new applicability. The horizontal-axis wind turbine of the present invention has a hub 1 and a blade 2 that are connected by way of an interposed section 5b, 6b, 7 which can freely rotate around the pitch axis of the blade with respect to both the hub and the blade; and further comprises: a hub-side interposed section drive unit 10 that relatively rotates the interposed section with respect to the hub, and a blade-side interposed section drive unit 11 that relatively rotates the blade with respect to the interposed section.Type: ApplicationFiled: May 21, 2010Publication date: November 25, 2010Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventor: Shigeo Yoshida
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Patent number: 7787024Abstract: Even when a remaining amount of an image memory built in a digital camera is decreased, the photographing can be further continued while reserving a photographed image. An image which is obtained from an image input unit including image pickup means is accumulated into an image memory. When a remaining amount calculating unit detects that the remaining amount of the image memory is small, an image record discriminating unit compares it with an image size in a photograph mode at that time which is obtained from an image size table, thereby discriminating whether the continuation of the photographing can be performed or not. When the photographing is impossible, an image selecting unit selects an old image, an image in which the number of colors is small, or the like on the basis of management data regarding the photographed images in a memory managing table. The selected image is transmitted by a PHS communication by a data transmitting apparatus.Type: GrantFiled: April 13, 2005Date of Patent: August 31, 2010Assignee: Canon Kabushiki KaishaInventor: Shigeo Yoshida
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Patent number: 7684502Abstract: A communication network system sets communication parameters which enable an operation under a maximum possible communication rate in a situation where a transmission path has cyclic noise/impedance fluctuations. A transmission/reception apparatus transmits training packets for checking the state of the power line at two distinct points in time. A transmission/reception apparatus analyzes SNR at each carrier frequency, and stores an SNR evaluation result. The transmission/reception apparatus compares two SNR evaluations results which are obtained through two instances of a channel estimation algorithm, selects an SNR evaluation result which dictates a faster PHY rate, and transmits it to the transmission/reception apparatus. The transmission/reception apparatus changes modulation/demodulation rules based on the received SNR analytical result.Type: GrantFiled: July 21, 2004Date of Patent: March 23, 2010Assignee: Panasonic CorporationInventors: Akio Kurobe, Shigeo Yoshida, Tomohiro Kimura, Yuji Igata, Masahiro Maki, Toshiyuki Wakisaka, Hisao Koga, Mutsuhiko Oishi
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Publication number: 20090279638Abstract: A communication network system sets communication parameters which enable an operation under a maximum possible communication rate in a situation where a transmission path has cyclic noise/impedance fluctuations. A transmission/reception apparatus 100 transmits training packets for checking the state of the power line at two distinct points in time. A transmission/reception apparatus analyzes SNR at each carrier frequency, and stores an SNR evaluation result. The transmission/reception apparatus compares two SNR evaluation results which are obtained through two instances of a channel estimation algorithm, selects an SNR evaluation result which dictates a faster PHY rate, and transmits it to the transmission/reception apparatus. The transmission/reception apparatus changes modulation/demodulation rules based on the received SNR analytical result.Type: ApplicationFiled: July 17, 2009Publication date: November 12, 2009Inventors: Akio KUROBE, Shigeo Yoshida, Tomohiro Kimura, Yuji Igata, Masahiro Maki, Toshiyuki Wakisaka, Hisao Koga, Mutsuhiko Oishi
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Publication number: 20090241659Abstract: The present invention provides a method for measuring the turbulence intensity of a horizontal axis wind turbine that is capable of accurately obtaining the value of the turbulence intensity without the effect of the rotor and by taking into consideration the motion of the nacelle. In the method for measuring the turbulence intensity of a horizontal axis wind turbine, with the nacelle located on the upwind side of the rotor of the horizontal axis wind turbine, measurement values are obtained from an anemometer that is located on the nacelle and an acceleration sensor that is fastened to the nacelle, and the absolute value of the turbulence intensity is calculated based on the measurement values from the anemometer and the measurement values from the acceleration sensor. As a result, it is possible to accurately calculate the absolute value of the turbulence intensity that includes the effect of the movement of the nacelle.Type: ApplicationFiled: March 27, 2009Publication date: October 1, 2009Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Shigeo YOSHIDA, Soichiro KIYOKI
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Publication number: 20090060061Abstract: A communication apparatus is connected to a transmission channel for transmitting data to another communication apparatus. The communication apparatus includes: a communication frame generator which generates a communication frame for storing the data; and a controller which controls to insert a pilot symbol into the communication frame based on a state of the transmission channel.Type: ApplicationFiled: August 29, 2008Publication date: March 5, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO, LTD.Inventors: Taisuke KONISHI, Nobuhiko Noma, Nobutaka Kodama, Hisao Koga, Shigeo Yoshida
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Publication number: 20090047129Abstract: Disclosed a horizontal axis wind turbine including: a rotor; a nacelle; a tower; an independent pitch control device; and a yaw control device, wherein the horizontal axis wind turbine is an up-wind type one including a waiting mode, wherein (1) the independent pitch control device performs a first step of changing all the blades to be in feathering states when the wind speed exceeds the predetermined value, a second step of changing the blades to be in reverse feathering states one by one sequentially, and a third step of holding all the blades in the reverse feathering states, and (2) the yaw control device controls a yaw brake to take a braking value allowing the yaw rotation when the wind speed exceeds the predetermined value, wherein the rotor is allowed to swing a leeward of the tower by executing the control operations (1) and (2) as the waiting mode.Type: ApplicationFiled: May 22, 2006Publication date: February 19, 2009Inventor: Shigeo Yoshida
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Patent number: 7488854Abstract: The present invention provites a compound having the following structure: wherein, in the formula: X is selected from the group consisting of hydroxy, substituted hydroxy, halogen, thiol, and substituted thiol; one of Y1 and Y2 is hydrogen or alkyl, and the other is Z-W, wherein Z is a single bond, or a divalent group having alkane or substituted alkane having two hydrogen atoms removed, and W is hydroxy, substituted hydroxy, aldehyde, carboxyl, or substituted carboxyl; and R1-R24 are independently selected from the group of hydrogen, alkyl, and substituted alkyl.Type: GrantFiled: March 12, 2003Date of Patent: February 10, 2009Assignees: The National Institute of Agrobiological Sciences, RikenInventors: Shigemi Seo, Yuko Ohashi, Hideharu Seto, Shigeo Yoshida
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Publication number: 20080304964Abstract: To provide a horizontal axis wind turbine capable of reducing flutter, and by extension, reducing the load on the wind turbine, without controlling the yaw, regardless of the direction of the wind relative to the nacelle. When the wind speed is above a specific value, the yaw angle of the nacelle is held constant, the blade pitch angle is controlled according to the yaw angle Y of the wind direction relative to the nacelle, and the rotor is allowed to rotate freely. Even when the yaw angle of the nacelle is held constant, allowing the rotor to rotate freely makes it possible to reduce the load by avoiding flutter.Type: ApplicationFiled: June 4, 2008Publication date: December 11, 2008Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventor: Shigeo YOSHIDA
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Publication number: 20080284857Abstract: Even when a remaining amount of an image memory built in a digital camera is decreased, the photographing can be further continued while reserving a photographed image. An image which is obtained from an image input unit including image pickup means is accumulated into an image memory. When a remaining amount calculating unit detects that the remaining amount of the image memory is small, an image record discriminating unit compares it with an image size in a photograph mode at that time which is obtained from an image size table, thereby discriminating whether the continuation of the photographing can be performed or not. When the photographing is impossible, an image selecting unit selects an old image, an image in which the number of colors is small, or the like on the basis of management data regarding the photographed images in a memory managing table. The selected image is transmitted by a PHS communication by a data transmitting apparatus.Type: ApplicationFiled: July 11, 2008Publication date: November 20, 2008Applicant: CANON KABUSHIKI KAISHAInventor: Shigeo YOSHIDA
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Patent number: 7445420Abstract: A horizontal axis wind turbine includes: a rotor having a hub and at least two or more blades; a nacelle for pivotally supporting the rotor through a rotating shaft connected to the hub; a tower for supporting the nacelle; and an independent pitch control unit capable of independently controlling pitch angles of the blades, respectively, wherein the independent pitch control units control the pitch angles so that all the blades are made in a full feather position in case of a wind speed not less than a predetermined value, and subsequently controls the pitch angles of the respective blades so as to be sequentially reversed one by one, and further subsequently, carries out control so that the wind turbine idles in an all-blade negative feather position where the pitch angles of all the blades are reversed.Type: GrantFiled: June 29, 2005Date of Patent: November 4, 2008Assignee: Fuji Jukogyo Kabushiki KaishaInventor: Shigeo Yoshida
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Publication number: 20080247875Abstract: The purpose of the invention is to protect, in a horizontal axis wind turbine with an exhaust aperture for exhausting air from within the nacelle, the exhaust aperture and the internal structures from storm winds through facing the exhaust aperture away from the storm wind, even when storm winds are received from all directions relative to the nacelle. A rotary duct 4 is attached to the nacelle 1 so as to be able to rotate freely in the yaw direction, and is rotated in the yaw direction in accordance with changes in the wind direction. The exhaust aperture 4a is provided at a position that changes direction depending on the rotation of the rotary duct 4 in the yaw direction. By rotating the rotary duct 4 in the yaw direction so that the exhaust aperture 4a will face the downwind side in accordance with changes in the wind direction, the exhaust aperture 4a can be faced away from storm winds, even when storm winds are received from all directions in relation to the nacelle 1.Type: ApplicationFiled: April 3, 2008Publication date: October 9, 2008Applicant: Fuji Jukogyo Kabushiki KaishaInventor: Shigeo YOSHIDA