Patents by Inventor Hiroshi Ishizawa
Hiroshi Ishizawa 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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Publication number: 20240099553Abstract: Provided is an endoluminal device system including: an elongated and flexible endoluminal device; a wire that is disposed in the endoluminal device; a first sensor that detects tension of the wire; a second sensor that detects displacement of the wire; a driving device capable of pulling the wire; and a processor. The processor is configured to: cause the driving device to execute a relaxing operation for relaxing the wire, acquire the tension and the displacement of the wire during the relaxing operation, which are detected by the first sensor and the second sensor, respectively, and adjust a control parameter of the endoluminal device based on a rate of change in the tension with respect to the displacement.Type: ApplicationFiled: July 7, 2023Publication date: March 28, 2024Applicant: OLYMPUS MEDICAL SYSTEMS CORP.Inventors: Noriaki YAMANAKA, Shota SAWADA, Hiroshi ASHIBA, Saki ISHIZAWA, Shun INOUE
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Patent number: 8704706Abstract: According to one embodiment, a radar return signal processing apparatus includes a detector, an estimation unit and an extraction unit. The detector detects an average Doppler frequency, a spectrum width, and a received power of each of echoes, from a radar return signal obtained repeatedly at regular intervals. The estimation unit estimates an optimum mixed density function by learning modeling a shaped of the frequency spectrum by calculating repeatedly a sum of density functions of each of the echoes. The extraction unit extracts information on any one of the echoes included in the radar return signal, from a parameter of the estimated mixed density function.Type: GrantFiled: February 28, 2011Date of Patent: April 22, 2014Assignees: Kabushiki Kaisha Toshiba, Tokyo University of Agriculture and Technology, a National University Corporation of JapanInventors: Hideki Marui, Toshihisa Tanaka, Satoshi Kon, Fumihiko Mizutani, Masakazu Wada, Hiroshi Ishizawa
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Patent number: 8416119Abstract: According to one embodiment, a weather radar apparatus includes a transmitting/receiving unit configured to transmit a radar wave to an observation target and receive a reflected wave, a distribution unit configured to distribute a received signal of the reflected wave to a main path and at least another path, an extraction unit configured to extract, from a signal of the other path, an interference wave signal extracted from another radio station, and a removing unit configured to remove the interference wave signal extracted from a signal of the main path.Type: GrantFiled: June 29, 2010Date of Patent: April 9, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Fumihiko Mizutani, Masakazu Wada, Hiroshi Ishizawa
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Patent number: 8368582Abstract: According to one embodiment, a Doppler radar apparatus includes a quadrature detection unit configured to quadrature-detect a received signal of a reflected pulse from an observation target, and generate time-series data including an in-phase component and a quadrature component, an interference judgment unit configured to judge whether an interference signal is mixed into the received signal based on the time-series data, a correction unit configured to correct a vector expressed by the in-phase component and the quadrature component such that variation with respect to time of a deviation angle of the vector continues when the interference judgment unit has judged that an interference signal is mixed into the received signal, and a calculation unit configured to calculate a Doppler velocity of the observation target based on an amount of variation with respect to time of the deviation angle of corrected vector.Type: GrantFiled: June 23, 2010Date of Patent: February 5, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Hiroshi Ishizawa, Masakazu Wada, Fumihiko Mizutani
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Patent number: 8207889Abstract: According to one embodiment, a dual polarization radar apparatus includes a received power calculation unit configured to calculate a horizontal polarization received power and a vertical polarization received power, the horizontal polarization received power indicating a power value of a horizontal polarization received signal reflected from an observation target, the vertical polarization received power indicating a power value of a vertical polarization received signal reflected from the observation target, a power ratio calculation unit configured to calculate a power ratio between the horizontal polarization received power and the vertical polarization received power, and an interference judgment unit configured to judge that an interference signal is mixed to the horizontal polarization received signal or the vertical polarization received signal when the power ratio is greater than a predetermined threshold value.Type: GrantFiled: June 29, 2010Date of Patent: June 26, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Hiroshi Ishizawa, Masakazu Wada, Fumihiko Mizutani
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Publication number: 20110304501Abstract: According to one embodiment, a radar return signal processing apparatus includes a detector, an estimation unit and an extraction unit. The detector detects an average Doppler frequency, a spectrum width, and a received power of each of echoes, from a radar return signal obtained repeatedly at regular intervals. The estimation unit estimates an optimum mixed density function by learning modeling a shaped of the frequency spectrum by calculating repeatedly a sum of density functions of each of the echoes. The extraction unit extracts information on any one of the echoes included in the radar return signal, from a parameter of the estimated mixed density function.Type: ApplicationFiled: February 28, 2011Publication date: December 15, 2011Inventors: Hideki MARUI, Toshihisa Tanaka, Satoshi Kon, Fumihiko Mizutani, Masakazu Wada, Hiroshi Ishizawa
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Publication number: 20110063164Abstract: According to one embodiment, a weather radar apparatus includes a transmitting/receiving unit configured to transmit a radar wave to an observation target and receive a reflected wave, a distribution unit configured to distribute a received signal of the reflected wave to a main path and at least another path, an extraction unit configured to extract, from a signal of the other path, an interference wave signal extracted from another radio station, and a removing unit configured to remove the interference wave signal extracted from a signal of the main path.Type: ApplicationFiled: June 29, 2010Publication date: March 17, 2011Inventors: Fumihiko MIZUTANI, Masakazu WADA, Hiroshi ISHIZAWA
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Publication number: 20110063161Abstract: According to one embodiment, a dual polarization radar apparatus includes a received power calculation unit configured to calculate a horizontal polarization received power and a vertical polarization received power, the horizontal polarization received power indicating a power value of a horizontal polarization received signal reflected from an observation target, the vertical polarization received power indicating a power value of a vertical polarization received signal reflected from the observation target, a power ratio calculation unit configured to calculate a power ratio between the horizontal polarization received power and the vertical polarization received power, and an interference judgment unit configured to judge that an interference signal is mixed to the horizontal polarization received signal or the vertical polarization received signal when the power ratio is greater than a predetermined threshold value.Type: ApplicationFiled: June 29, 2010Publication date: March 17, 2011Inventors: Hiroshi ISHIZAWA, Masakazu WADA, Fumihiko MIZUTANI
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Publication number: 20110050486Abstract: According to one embodiment, a Doppler radar apparatus includes a quadrature detection unit configured to quadrature-detect a received signal of a reflected pulse from an observation target, and generate time-series data including an in-phase component and a quadrature component, an interference judgment unit configured to judge whether an interference signal is mixed into the received signal based on the time-series data, a correction unit configured to correct a vector expressed by the in-phase component and the quadrature component such that variation with respect to time of a deviation angle of the vector continues when the interference judgment unit has judged that an interference signal is mixed into the received signal, and a calculation unit configured to calculate a Doppler velocity of the observation target based on an amount of variation with respect to time of the deviation angle of corrected vector.Type: ApplicationFiled: June 23, 2010Publication date: March 3, 2011Inventors: Hiroshi ISHIZAWA, Masakazu WADA, Fumihiko MIZUTANI
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Patent number: 7765357Abstract: To be able to transmit a response packet to the original request node after a bus ID/a device ID is replaced in the PCI-Express switch for a PCI-Express communication system, a unique node ID for indicating each node is set to the nodes. Additionally, it is confirmed whether or not the packet is transferred in the correct order in a series of packet transfers. For that purpose, a sequence code indicating the sequence number of a packet in a series of packet transfer is set in an address field of a packet of data transfer.Type: GrantFiled: November 27, 2006Date of Patent: July 27, 2010Assignee: Fujitsu LimitedInventors: Yuichi Ogawa, Hiroshi Ishizawa, Terumasa Haneda, Kazunori Masuyama
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Patent number: 7484033Abstract: To be able to transmit a response packet to a target, which is the original request source node, even if, after issuing a request from a node to another, a bus ID/a device ID is replaced in the PCI-Express switch before said another node makes a response to the request source node in a PCI-Express communication system, which uses a PCI-Express switch. For that purpose, a unique node ID for indicating each node is set to the nodes, a channel ID is set to each channel used for data transfer, and the node ID of the transfer destination module, the channel ID of a channel used for the data transfer, and the packet type indicating that the packet is a request or a response are set in an address field of a packet of data transfer. For the data transfer, only a memory write request packet routed by address routing is used.Type: GrantFiled: February 23, 2006Date of Patent: January 27, 2009Assignee: Fujitsu LimitedInventors: Hiroshi Ishizawa, Terumasa Haneda, Yuichi Ogawa
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Publication number: 20070073960Abstract: To be able to transmit a response packet to the original request node after a bus ID/a device ID is replaced in the PCI-Express switch for a PCI-Express communication system, a unique node ID for indicating each node is set to the nodes. Additionally, it is confirmed whether or not the packet is transferred in the correct order in a series of packet transfers. For that purpose, a sequence code indicating the sequence number of a packet in a series of packet transfer is set in an address field of a packet of data transfer.Type: ApplicationFiled: November 27, 2006Publication date: March 29, 2007Applicant: Fujitsu LimitedInventors: Yuichi Ogawa, Hiroshi Ishizawa, Terumasa Haneda, Kazunori Masuyama
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Publication number: 20060218336Abstract: To be able to transmit a response packet to a target, which is the original request source node, even if, after issuing a request from a node to another, a bus ID/a device ID is replaced in the PCI-Express switch before said another node makes a response to the request source node in a PCI-Express communication system, which uses a PCI-Express switch. For that purpose, a unique node ID for indicating each node is set to the nodes, a channel ID is set to each channel used for data transfer, and the node ID of the transfer destination module, the channel ID of a channel used for the data transfer, and the packet type indicating that the packet is a request or a response are set in an address field of a packet of data transfer. For the data transfer, only a memory write request packet routed by address routing is used.Type: ApplicationFiled: February 23, 2006Publication date: September 28, 2006Applicant: Fujitsu LimitedInventors: Hiroshi Ishizawa, Terumasa Haneda, Yuichi Ogawa