Patents Assigned to Hitachi Kokusai Electric Inc.
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Patent number: 11160044Abstract: A synchronization signal conversion device comprises a first communication device and a second communication device. The first communication device acquires, from the received GPS signals, time synchronization information synchronized to a GPS reference time, and wirelessly transmits the time synchronization information at a frequency different from that of the GPS signals. The second communication device receives the radio signals from the first communication device and acquires the time synchronization information, synchronizes internal time information to the GPS reference signal on the basis of the time synchronization information, and generates pseudo-GPS reception signals including satellite information and outputs the signal to a reception-side base station device such that the synchronized internal time information and pre-stored position information are acquired at the base station device.Type: GrantFiled: August 22, 2019Date of Patent: October 26, 2021Assignee: HITACHI KOKUSAI ELECTRIC INC.Inventors: Yoichi Kushioka, Koji Yotsumoto
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Patent number: 11134459Abstract: In a base station, a signal synchronization unit detects a received timing of a signal from a mobile station. A correlation position protection unit corrects the received timing on the basis of time from a transmitting timing at which a signal transmitting operation to the mobile station is started to the received timing. A transmitting timing generation unit generates, on the basis of the received timing after the correction, a transmitting timing at which a subsequent signal transmitting operation to the mobile station is started. Further, an FB frame generation unit generates frame period information that indicates a correction value by the correlation position protection unit, and a transmitting processing unit transmits, to the mobile station, a signal including the frame cycle information in response to the generation of the transmitting timing.Type: GrantFiled: August 22, 2019Date of Patent: September 28, 2021Assignee: HITACHI KOKUSAI ELECTRIC INC.Inventors: Daiki Hoshi, Hiroki Kato, Tatsuhiro Nakada
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Patent number: 11128024Abstract: A combiner-divider includes a first impedance converter disposed between the first port and the second port, a second impedance converter disposed between the first port and the third port, and an isolation unit disposed between the second port and the third port. The isolation unit includes a balun formed of a first semi-rigid cable and a second semi-rigid cable, and terminating resistors. Each line length of the first impedance converter, the second impedance converter, and the third impedance converter corresponds to ¼ wavelength at a center frequency. A relationship of each impedance Ri of the second port and the third port, an impedance Ro of the first port, and each impedance W of the first impedance converter and the second impedance converters is expressed by W=(2×Ri×Ro)1/2.Type: GrantFiled: January 30, 2017Date of Patent: September 21, 2021Assignee: HITACHI KOKUSAI ELECTRIC INC.Inventors: Yusaburo Goto, Keiichi Sakamaki, Yu Wakabayashi
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Patent number: 11129045Abstract: In a communication device and a communication method, multiple pieces of QoS control information are stored in a routing information base, each piece of QoS control information, with a terminal wired to the communication device itself as a transmission source, defining a bandwidth control value and a priority degree that correspond to communication data specified by a combination of the transmission source and a destination. When communication data is inputted, a control unit selects QoS control information that matches a combination of the transmission source and the destination of the inputted communication data from among the stored multiple pieces of QoS control information and indicates a bandwidth to a bandwidth control unit on the basis of the selected QoS control information, indicates a priority degree to a DSCP marking unit, and performs wireless transmission.Type: GrantFiled: November 11, 2016Date of Patent: September 21, 2021Assignee: HITACHI KOKUSAI ELECTRIC INC.Inventors: Tomoya Shoji, Hiroshi Nakano, Nobuyuki Uchikawa
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Patent number: 11108994Abstract: A monitoring server of a platform-side monitoring system analyzes an image taken by a plurality of platform monitoring cameras installed on a platform, and transmits information on the results of detection to a car-side monitoring system in the case where an object of attention is detected from the image. A control unit of the car-side monitoring system allows the monitor to display an image taken by the car camera which corresponds to the platform monitoring camera that has taken an image of the object of attention in a mode that is different from that of the images taken by the other car cameras on the basis of the information on the results of detection that has been received from the platform-side monitoring system.Type: GrantFiled: August 20, 2019Date of Patent: August 31, 2021Assignee: Hitachi Kokusai Electric Inc.Inventors: Ryuichi Saito, Yohei Yamamoto
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Patent number: 11082102Abstract: A beam forming antenna in which directivity directions of beams can be controlled at higher resolution of control is provided. The beam forming antenna includes a matrix circuit having multiple final output terminals and multiple antenna elements connected to the multiple final output terminals respectively. The matrix circuit includes a first sub-matrix, a second sub-matric, and adders which combine outputs of the first sub-matrix and outputs of the second sub-matrix. By selecting any input terminal out of the multiple input terminals of the first sub-matrix or the multiple input terminals of the second sub-matrix and inputting a signal, a signal having a predetermined phase difference between output terminals is output at the multiple final output terminals and the phase difference between output terminals has a differing value according to a selected input terminal.Type: GrantFiled: September 7, 2018Date of Patent: August 3, 2021Assignee: HITACHI KOKUSAI ELECTRIC INC.Inventor: Toshiyuki Nagasaku
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Patent number: 11041240Abstract: There is provided a technique that includes: a process chamber in which a process of forming a film containing a main element on a substrate is performed; a first nozzle configured to supply a precursor containing the main element to the substrate in the process chart; a second nozzle separated from the first nozzle and configured to supply the precursor to the substrate in the process chamber; a third nozzle configured to supply a reactant to the substrate in the process chamber; and a plurality of first exhaust ports configured to exhaust an internal atmosphere of the process chamber, wherein each of the plurality of first exhaust ports is disposed at a position which does not face a first gas ejection hole of the first nozzle and a second gas ejection hole of the second nozzle, in a plan view.Type: GrantFiled: March 22, 2018Date of Patent: June 22, 2021Assignee: HITACHI KOKUSAI ELECTRIC, INC.Inventors: Kosuke Takagi, Risa Yamakoshi, Hideki Horita, Atsushi Hirano
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Publication number: 20210158137Abstract: Even if an existing learning dataset is limited, a new learning dataset with sufficient variation is generated. Therefore, for each of a plurality of learning data subsets, new input signals are generated from input signals of a plurality of pieces of learning data, and a plurality of pieces of new learning data that are respectively combinations of the new input signals and output signals of the corresponding learning data subset are generated. The input signals of the plurality of pieces of the learning data included in the corresponding learning data subset are divided into a first signal group and a second signal group, and the new input signals are generated by a learning device that is generated by performing learning by the first signal group set as an input signal set and the second signal group set as an output signal set.Type: ApplicationFiled: May 30, 2017Publication date: May 27, 2021Applicant: HITACHI KOKUSAI ELECTRIC INC.Inventor: HIROTO SASAO
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Patent number: 11017537Abstract: An abandoned item detection unit detects an abandoned item shown in an image taken by any of a plurality of imaging devices. A person identification unit specifies the image directly before or directly after the appearance of the abandoned item as an image of abandonment timing, and identifies at least one person shown in the image of abandonment timing as a target person. A person search unit searches for an image showing the target person from among the images respectively taken by any of the plurality of imaging devices. A result display unit outputs a display showing the movement of the target person on the screen of a user terminal on the basis of the imaging device that has taken each image showing the target person and the imaging time at which each image showing the target person was taken.Type: GrantFiled: April 28, 2017Date of Patent: May 25, 2021Assignee: Hitachi Kokusai Electric Inc.Inventors: Junichi Togashi, Wataru Ito
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Patent number: 11006061Abstract: In an image correction method and an image capture device, a one-frame addition average calculation unit calculates a one-frame addition average value. If the one-frame addition average value falls within an appropriate range, a determination circuit inputs image data for one frame to an adder and the adder adds the image data to a cumulative correction value to update the correction value. The updated correction value is stored in a frame memory. If the one-frame addition average value is outside the appropriate range, the image data for one frame is discarded. After updating the cumulative correction value until the number of updates reaches a prescribed number, an FPN correction value is calculated by dividing the cumulative correction value stored in the frame memory by the prescribed number, and an image is corrected by subtracting the FPN correction value from the image data inputted at the time of imaging.Type: GrantFiled: June 12, 2017Date of Patent: May 11, 2021Assignee: HITACHI KOKUSAI ELECTRIC INC.Inventors: Tadaaki Yanagi, Kazuhiko Nakamura, Kentaro Suguro, Kazuyoshi Sato
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Publication number: 20210135357Abstract: An antenna control device includes a weight unit in which weight values to be superimposed on transmission/reception signals are set for forming radiation patterns using a plurality of antennas and a weight synthesis unit that superposes the weight values on the transmission/reception signals. The antenna control device further includes an arrival direction detector that detects arrival directions of the reception signals, a distribution information calculator that calculates distribution information of the detected arrival directions, a signal quality calculator that calculates signal quality information of each of the radiation patterns, and a radiation pattern selector that selects a radiation pattern on the basis of the distribution information and signal quality information for the radiation patterns, and sets the weight values corresponding to the selected radiation pattern in the weight unit.Type: ApplicationFiled: March 20, 2018Publication date: May 6, 2021Applicant: HITACHI KOKUSAI ELECTRIC INC.Inventors: Satoru YASUI, Takahito ISHII, Keiju ITO, Teppei SHOJI, Koji YOTSUMOTO
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Publication number: 20210124934Abstract: Provided is a technology for monitoring vehicle doors of a train that achieves monitoring with substantially no downtime when any one of multiple monitoring cameras breaks down. A first to a fourth monitoring camera attached outside of a vehicle to monitor a first to a fourth door of the vehicle. A first monitoring camera and a second monitoring camera are paired with each other, and a third monitoring camera and a fourth monitoring camera are paired with each other. If the first monitoring camera breaks down, the second monitoring camera captures areas of both the first door and the second door, and trims and extracts each of the areas.Type: ApplicationFiled: March 7, 2018Publication date: April 29, 2021Applicant: HITACHI KOKUSAI ELECTRIC INC.Inventor: KANA OHKI
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Publication number: 20210075938Abstract: Provided is a heat-resistant imaging camera configured to move in a high temperature furnace and configured to capture high-definition images of the outer side or the inner side of a painted object passing in a high temperature drying furnace. Heat insulators (13a to 13f) are attached to all inner surfaces of an outer case (10) of a heat-resistant imaging camera (1) except a double glass window (21), and cold storage material packs (15a to 15e) are disposed inward of the heat insulators (13a to 13f) in layers so as to cover around a camera (2). Intrusive heat is absorbed by melting latent heat when the cold storage material packs (15a to 15e) are melted and changed in phase from a solid to a liquid at a specific temperature or higher, thereby ensuring heat resistance that maintains the camera (2) at a safely operatable temperature.Type: ApplicationFiled: August 27, 2020Publication date: March 11, 2021Applicant: Hitachi Kokusai Electric Inc.Inventors: Keigo NAKAMURA, Takahiro DAIKOKU, Takeshi KASHIYAMA, Yoshiyuki MURANO
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Patent number: 10939253Abstract: A plurality of terminal stations that share the same access point are controlled to have communication opportunities on the basis of terminal station groups (e.g., operators). A radio communication system, in which the plurality of terminal stations 102 to 106 is connected to a network via an access point 101, includes an access manager 107 connected to the access point. The access manager includes a user/group manager that manages the plurality of terminal stations in groups, and a radio resource manager that determines the necessity of bandwidth limit on the basis of the communication status of each of the groups and transmit from the access point a control message that allows communication of a particular group among the groups and stops communication of other groups when it is determined that the bandwidth limit is necessary.Type: GrantFiled: November 15, 2017Date of Patent: March 2, 2021Assignee: HITACHI KOKUSAI ELECTRIC INC.Inventor: Keigo Hasegawa
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Patent number: 10912149Abstract: A communication device that is used for ad-hoc network communication or wireless mesh network communication includes a setting interface unit configured to set an IP address of a communication device corresponding to low-delay communication, and an ad-hoc routing control unit. When a request for low-delay communication is provided from the setting interface unit, the ad-hoc routing control unit determines a route matching the IP address of the communication device and determines whether the low-delay communication is possible. The ad-hoc routing control unit sets a control message transmission interval to the maximum interval when the low-delay communication is possible, and sets the control message transmission interval to the minimum interval when the low-delay communication is not possible.Type: GrantFiled: July 22, 2016Date of Patent: February 2, 2021Assignee: HITACHI KOKUSAI ELECTRIC INC.Inventors: Tomoya Shoji, Tomoya Miura, Nobuyuki Uchikawa
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Patent number: 10896810Abstract: To provide a RF generating apparatus that enables apparatus size to be decreased and the cost reduced thereby while also improving power efficiency by performing a stable matching operation, and to provide a plasma treatment apparatus using said apparatus. This RF generating apparatus comprises a plurality of RF generators and matching units, the matching units being provided with only variable-capacity capacitors connected in parallel, thereby reducing the number of elements in terms of the variable-capacity capacitors. A matching calculation section for the RF generators determines, on the basis of traveling waves and reflection waves detected by a detection circuit, the capacity values of the variable-capacity capacitors for the matching units, while adjusting and determining the oscillation frequencies for oscillation circuits in the RF generators so as to decrease the level of the reflection waves. The plasma treatment apparatus uses this RF generating apparatus.Type: GrantFiled: December 16, 2019Date of Patent: January 19, 2021Assignee: HITACHI KOKUSAI ELECTRIC INC.Inventors: Yoshiyuki Oshida, Naoya Fujimoto, Norikazu Kato, Takeshi Okada, Tsuyoshi Takeda
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Patent number: 10878584Abstract: Disclosed is an autonomous distributed system for detecting and tracking a falling object within a region being monitored by using a plurality of camera assemblies cooperating with each other, and disclosed is a camera assembly therefor. Each of the camera assembly, normally, operates in a falling object detecting mode, but, when detecting a falling object, shifts to a tracking mode. In the tracking mode, a degree of danger of the falling object is determined by referring to the size of the falling object in real space and the movement of a falling. In addition, when the falling object is further tracked and moved outside of the angle of view, a search request including information of the degree of danger as to the falling object is issued to surrounding camera assemblies, such that the multiple camera assemblies search for the falling object in cooperation.Type: GrantFiled: March 16, 2018Date of Patent: December 29, 2020Assignee: HITACHI KOKUSAI ELECTRIC INC.Inventors: Yoshiki Agata, Kunihiro Soga, Muneaki Yamaguchi, Yuichiro Komiya
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Patent number: 10864927Abstract: Provided is a technology for monitoring train doors which improves the accuracy of detection of trapping in vehicle doors. A server compares the difference between a static image (reference image 91), from each monitoring camera, of a normal state in which there is no trapping in vehicle doors, said static images being held in the server in advance, and a static image (an observation image 92) first acquired in a prescribed acquisition time. If a difference is present, the difference (difference image 94) between the reference image 91 and the observation image 92 acquired in the acquisition time is acquired. A quadrilateral F which covers the four sides of an object constituting the difference is subsequently rendered, the centre point of the quadrilateral is obtained, it is determined that trapping has occurred if movement of a centre coordinate C1, C2, . . . Cn, i.e.Type: GrantFiled: March 7, 2018Date of Patent: December 15, 2020Assignee: HITACHI KOKUSAI ELECTRIC INC.Inventor: Kana Ohki
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Publication number: 20200382913Abstract: A plurality of terminal stations that share the same access point are controlled to have communication opportunities on the basis of terminal station groups (e.g., operators). A radio communication system, in which the plurality of terminal stations 102 to 106 is connected to a network via an access point 101, includes an access manager 107 connected to the access point. The access manager includes a user/group manager that manages the plurality of terminal stations in groups, and a radio resource manager that determines the necessity of bandwidth limit on the basis of the communication status of each of the groups and transmit from the access point a control message that allows communication of a particular group among the groups and stops communication of other groups when it is determined that the bandwidth limit is necessary.Type: ApplicationFiled: November 15, 2017Publication date: December 3, 2020Applicant: HITACHI KOKUSAI ELECTRIC INC.Inventor: KEIGO HASEGAWA
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Patent number: 10853949Abstract: The purpose of the present invention is to provide a technology which adaptively switches video analysis methods according to a congestion situation within a video, and which carries out a suitable video analysis by a limited computational volume. Provided is an image processing device 100, wherein a congestion estimation unit 102 estimates a congestion situation within a video which is acquired from an image input unit 101. A control unit 103 switches methods for video analysis according to the congestion situation. In a situation of low congestion, an image analysis unit for use in normal situations 105 carries out the video analysis by a basic method. In a situation of high congestion, an image analysis unit for use in congested situations 106 carries out a high-precision video analysis, such as an analysis which spans a plurality of frames.Type: GrantFiled: September 21, 2017Date of Patent: December 1, 2020Assignee: HITACHI KOKUSAI ELECTRIC INC.Inventors: Yuichiro Komiya, Muneaki Yamaguchi, Hiroaki Nakakita, Kazunari Iwanaga, Junichi Togashi, Yohei Akimoto, Masaya Okada, Atsushi Sassa, Wataru Ito