Patents Assigned to Hitachi, Ltd.
  • Publication number: 20210143255
    Abstract: Provided is a semiconductor device whose performance is improved. A p type body region is formed in an n type semiconductor layer containing silicon carbide, and a gate electrode is formed on the body region with a gate insulating film interposed therebetween. An n type source region is formed in the body region on a side surface side of the gate electrode, and the body region and a source region are electrically connected to a source electrode. A p type field relaxation layer FRL is formed in the semiconductor layer on the side surface side of the gate electrode, and the source electrode is electrically connected to the field relaxation layer FRL. The field relaxation layer FRL constitutes a part of the JFET 2Q which is a rectifying element, and a depth of the field relaxation layer FRL is shallower than a depth of the body region.
    Type: Application
    Filed: October 27, 2020
    Publication date: May 13, 2021
    Applicant: HITACHI, LTD.
    Inventors: Takeru SUTO, Naoki TEGA, Naoki WATANABE, Hiroshi MIKI
  • Patent number: 11003194
    Abstract: A distance between an autonomously mobile information processing device and an apparatus is calculated based on positional information of the information processing device and positional information of the apparatus installed in a service provision site and necessary for a service to be provided by the information processing device, and the apparatus that is available is determined based on the distance between the information processing device and the apparatus in a case where the information processing device coordinates with the apparatus to provide the service.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: May 11, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Tomohiro Matsuda, Hideya Yoshiuchi
  • Patent number: 11003368
    Abstract: One or more storage systems are connected to one or more storage boxes comprising multiple storage devices. Multiple storage areas provided by one or more storage boxes include an allocated area, which is a storage area that is allocated to a virtual volume, and an empty area, which is a storage area that is not allocated to any logical volume. Multiple owner rights corresponding to multiple storage areas are set in one or more storage systems. A storage system having an empty area owner right changes an empty area to the allocated area by allocating the empty area. In a case where a configuration change (a relative change in the number of storage boxes with respect to the number of storage systems) is performed, a first storage system that exists after the configuration change sets, in the first storage system, either more or fewer owner rights than the owner rights, which have been allocated to the first storage system before the configuration change.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: May 11, 2021
    Assignee: HITACHI, LTD.
    Inventors: Akira Yamamoto, Miho Imazaki
  • Patent number: 11002811
    Abstract: Provided are a magnetic resonance imaging device and a superconducting magnet capable of preventing generation of eddy currents accompanying vibration of a radiation shield and of reducing image quality deterioration. The superconducting magnet for a magnetic resonance imaging device includes a substantially cylindrical vacuum vessel, a substantially cylindrical radiation shield that is provided inside the vacuum vessel, and a superconducting coil that is provided inside the radiation shield. The radiation shield has an inner cylinder located radially inward of the superconducting coil. The inner cylinder of the radiation shield is provided with an annular rib formed in a circumferential direction about the central axis of the inner cylinder.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: May 11, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Yukinobu Imamura, Akira Kurome, Shin Hoshino, Takeshi Yatsuo, Takuya Fujikawa
  • Patent number: 11003647
    Abstract: The multidimensional data management system for speedily registering and searching multidimensional data includes: a central processing unit and a storage device that stores the multidimensional data including the respective values of plural dimensions, and multidimensional management data associating the ranges of the respective values of plural dimensions with character strings.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: May 11, 2021
    Assignee: HITACHI, LTD.
    Inventors: Hideki Hayashi, Akinori Asahara
  • Patent number: 11003810
    Abstract: A simulation system obtains multiple random number vectors and a parameter vector and calculates realized values of the behavior of a stochastic system corresponding to each obtained random number vector. Based on each obtained random number vector, on the obtained parameter vector, and on a weight function, the system calculates the weight of each obtained random number vector regarding each of the parameters in the obtained parameter vector, and calculates an evaluation value of the behavior of the stochastic system corresponding to each obtained random number vector. Based on the calculated behavior evaluation value corresponding to each obtained random number vector and on the weight of each obtained random number vector regarding the parameter selected from the obtained parameter vector, the system calculates the sensitivity of an expected value for the behavior evaluation value of the stochastic system with regard to the selected parameter.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: May 11, 2021
    Assignee: HITACHI, LTD.
    Inventors: Koji Fukuda, Yasuyuki Kudo
  • Patent number: 11004218
    Abstract: A three-dimensional image processing device includes: an input unit configured to acquire a first taken image and a second taken image respectively from a first imaging unit and a second imaging unit; and a stereo processing unit configured to execute stereo processing and then outputs a range image, for a common part where an imaging region of the first taken image and an imaging region of the second taken image have an overlap with each other, an imaging direction of the first imaging unit and an imaging direction of the second imaging unit are set toward a horizontal direction, and both side parts of the imaging region of the first imaging unit and both side parts of the imaging region of the second imaging unit are set as common parts.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: May 11, 2021
    Assignee: HITACHI, LTD.
    Inventor: Kazuyoshi Yamazaki
  • Publication number: 20210130935
    Abstract: The purpose of the present invention is to provide an alloy product which has both of high corrosion resistance enough to withstand severe corrosive/high-temperature environments and mechanical properties equivalent to or better than those of stainless steel, and which can be produced at lower cost than a Ni-based alloy. The Cr—Fe—Ni-based alloy product of the present invention is a product produced using a Cr—Fe—Ni-based alloy containing Cr as a largest-content component, wherein the product has such a microstructure that a dual-phase structure having a ferrite phase and an austenite phase coexisting therein serves as a matrix phase and an L12-type Ni-based intermetallic compound phase is dispersed and precipitated in the austenite phase.
    Type: Application
    Filed: November 9, 2018
    Publication date: May 6, 2021
    Applicant: HITACHI, LTD.
    Inventor: Masafumi NOUJIMA
  • Publication number: 20210133444
    Abstract: A work recognition apparatus acquires a reference image including a work target from an input and output unit, estimates a first relative position of the work target and a camera from the reference image, converts a two-dimensional work region for the work target included in the reference image into a three-dimensional work region using template information, stores the three-dimensional work region in a storage apparatus as work model information, estimates a second relative position of the work target and the camera in a determination image acquired by the camera, calculates pixel coordinates indicating a two-dimensional work region in the determination image on the basis of the second relative position and the three-dimensional work region, and outputs the two-dimensional work region in the determination image indicated by the pixel coordinates that has been calculated, so as to be displayed by the input and output apparatus.
    Type: Application
    Filed: October 26, 2020
    Publication date: May 6, 2021
    Applicant: HITACHI, LTD.
    Inventor: Takumi NITO
  • Publication number: 20210129854
    Abstract: The vehicle assistance system includes an infrastructure sensor installed in a predetermined place to detect an obstacle, an onboard apparatus connected to an onboard sensor which is mounted on the vehicle and which detects an obstacle, and a server installed in a place different from that of the infrastructure sensor. In the infrastructure sensor, the abnormality determination unit compares the first obstacle information related to the obstacle detected by the sensor unit and the second obstacle information related to the obstacle detected by the onboard sensor existing in a location different from that of the sensor unit, and determines whether or not the sensor unit or the onboard sensor is abnormal based on the result of this comparison.
    Type: Application
    Filed: September 23, 2020
    Publication date: May 6, 2021
    Applicant: HITACHI, LTD.
    Inventors: Akihiro KONDO, Takashi MATSUMOTO
  • Publication number: 20210130877
    Abstract: The present invention addresses the problem of providing a novel digital PCR analysis method. One embodiment of the novel digital PCR analysis method is a DNA detection method including the steps of: partitioning a DNA solution containing a fluorescent-labeled probe or a DNA intercalator and a target DNA to be detected into a plurality of compartments; carrying out a nucleic acid amplification reaction in the compartments; measuring a fluorescence intensity in association with a temperature change; calculating a melting temperature of a DNA double strand based on a change in the fluorescence intensity in association with the temperature change; and calculating a ratio of a fluorescence intensity at a second temperature that is lower than a first temperature in association with the temperature change to that at the first temperature.
    Type: Application
    Filed: May 20, 2019
    Publication date: May 6, 2021
    Applicant: HITACHI, LTD.
    Inventors: Junko TANAKA, Tatsuo NAKAGAWA, Yuzuru SHIMAZAKI, Kunio HARADA
  • Publication number: 20210128096
    Abstract: This is directed to calculating physical amounts of a plurality of types of basis materials without having to increase a calculation time. An image processing device is provided which includes a first basis material transformation unit that calculates each of physical amounts of two or more basis materials included in a first basis material group based on two or more types of projection data different in energy distribution, an image generation unit that generates a plurality of images, each of which is at least one of a projection image and a reconstructed image of an object, from physical amounts of two or more basis materials included in the first basis material group, and a second basis material transformation unit that calculates a physical amount of a basis material included in a second basis material group which is different from the first basis material group based on the plurality of images.
    Type: Application
    Filed: December 4, 2017
    Publication date: May 6, 2021
    Applicant: Hitachi, Ltd.
    Inventor: Yasutaka KONNO
  • Patent number: 10998830
    Abstract: A power conversion device includes: power conversion cells; and a controller to control the cells. Each cell includes: a transformer; a primary conversion unit on a primary side of the transformer; a secondary conversion unit on a secondary side; a primary bypass device for short-circuiting between input terminals of the cell; and a secondary bypass device for short-circuiting between output terminals of the cell. The input terminals and/or the output terminals of the cells are connected in series. When the primary conversion unit(s) of a part of the cells is stopped, the controller turns on the primary bypass device and sets secondary DC link voltages to prescribed values; and when the secondary conversion unit(s) of a part of the cells is stopped, the controller turns on the secondary bypass device and controls the primary conversions units to set primary DC link voltages to prescribed values.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: May 4, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Mitsuhiro Kadota, Takae Shimada
  • Patent number: 10999777
    Abstract: To improve line utilization efficiency in short-cycle data collection, it is provided a method of managing communication in a communication system, the communication system including: an aggregation unit configured to receive information through a communication path from a plurality of terminals, which are sources of information transmission; and a reservation unit configured to determine, for each of the plurality of terminals, timing at which the terminal transmits a signal, the method comprising steps of: receiving, by the reservation unit, a relative time specified by a user as a time at which the terminal transmits the information; and determining, by the reservation unit, as scheduling information, an absolute time unique throughout the communication system so that interference with another communication session is avoided when the terminal holds communication at the relative time.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: May 4, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Mikio Kuwahara, Makiko Satoh
  • Patent number: 10996641
    Abstract: Embodiments provide a system for controlling HVAC/ACMV system of a building, including an occupancy pattern extractor configured to generate at least one facility-based occupancy pattern for each facility type based on historical occupancy data and spatial information of the building; a zone occupancy predictor configured to predict zone occupancy variation of each zone after a predetermined time period, based on the facility-based occupancy patterns and real-time occupancy data; a similar zone matcher configured to match each zone with one or more pre-stored zones and determine air handler configurations based on the matched pre-stored zones; a configuration generator configured to determine configuration combinations by combining the air handler configurations for a plurality of zones of the building, each configuration combination including one of the air handler configurations for each zone; and a configuration optimizer configured to determine an optimal configuration combination based on one or more key
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: May 4, 2021
    Assignee: HITACHI, LTD.
    Inventors: Yang Yan, Rajesh Vellore Arumugam, Wujuan Lin
  • Patent number: 10995756
    Abstract: Provided is an air compressor which helps to attain a proper discharge air temperature and which is superior in energy saving property.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: May 4, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Masanao Kotani, Takeshi Tsuchiya, Ryoji Kawai, Kotaro Chiba, Minako Kanada, Sachio Sekiya
  • Patent number: 10996076
    Abstract: A management server 103 holds a parameter of a sensor device 101 and change management information related to a change in the parameter, and transmits the changed parameter and the change management information to the sensor device. The sensor device 101 holds the parameter and the change management information transmitted from the management server, and transmits the change management information to the management server together with measurement data. The management server collates the received change management information and preliminarily-held change management information to determine the change in the parameter on the basis of a result of the collation.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: May 4, 2021
    Assignee: HITACHI, LTD.
    Inventors: Rintaro Katayama, Kenichi Mizugaki, Ryosuke Fujiwara
  • Patent number: 10993701
    Abstract: A clutter reduction effect using adaptive beam forming is uniformly obtained with respect to the entire image even in an imaging condition in which the number of bundled signals is greatly distributed in an ultrasonic image. A received signal processing unit includes a summing unit that bundles the plurality of received signals for a predetermined imaging point or a plurality of signals obtained by processing the received signals, and a weighting unit that obtains a coherence value among the plurality of signals summed in the summing unit, and weights the plurality of signals before being summed in the summing unit or a signal obtained through summing in the summing unit, with a weight corresponding to the coherence value. The weighting unit weights the coherence value nonlinearly in a predetermined direction in the subject, and weights the plurality of signals before being summed in the summing unit or the signal obtained through summing in the summing unit by using the nonlinearly weighted coherence value.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: May 4, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Teiichiro Ikeda, Masanori Hisatsu, Chizue Ishihara, Mayumi Suzuki
  • Patent number: 10996295
    Abstract: Provided is a noise source search device to be applied to an MM apparatus that obtains an NMR signal generated from a subject disposed in a static magnetic field by applying an RF pulse of a high frequency coil and a gradient magnetic field pulse of a gradient magnetic field coil to the subject, the device including: a reference antenna and a probe antenna that measure a noise generated in the MRI apparatus; a noise generation condition specification unit that specifies an axis and a drive frequency as a noise generation condition generated in the MRI apparatus, on the basis of a noise intensity of the noise that is measured by the reference antenna; and a noise generation site specification unit that drives the gradient magnetic field coil under the noise generation condition that is specified by the noise generation condition specification unit.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: May 4, 2021
    Assignee: HITACHI, LTD.
    Inventor: Takeshi Yatsuo
  • Publication number: 20210125387
    Abstract: An embodiment of the process state analysis device of the present invention is provided with an evaluation value calculation unit and a graph creation unit. The evaluation value calculation unit calculates, within an evaluation value calculation range indicating a target range for calculating evaluation values, an evaluation value for each cluster that is classified on the basis of multi-dimensional process data output from each measurement device. The graph creation unit determines a hue for a graph element for each cluster on the basis of the evaluation value for the cluster as calculated within the evaluation value calculation range, and on the basis of a color reference evaluation value corresponding to a reference hue for the graph element, and creates and outputs a graph representing, for each aggregation unit time interval in a specified display period, the number of nodes belonging to each cluster.
    Type: Application
    Filed: May 23, 2019
    Publication date: April 29, 2021
    Applicant: HITACHI, LTD.
    Inventors: Miyuki KAWATA, Seunghwan PARK, Yoshiyuki TAKAMORI