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公开(公告)号：US20180302837A1
公开(公告)日：2018-10-18
申请号：US15950475
申请日：2018-04-11
Applicant: Hitachi, Ltd.
Inventor： Yasutaka SERIZAWA , Takashi TAKEUCHI
CPC classification number: H04W40/22 , H04B7/14 , H04B7/2606 , H04W72/1278 , H04W84/18 , H04W88/04
Abstract: There is provided a technique that enables flexible response to system configurations, application, and aims in a wireless connection sensor network system. A multihop wireless communication system includes an aggregation device and multiple wireless terminals connected to the aggregation device in wireless connection. The aggregation device includes, in a data request packet to request the data, a communication requirement to transmit data, and transmits the data request packet to the wireless terminal to be a data request destination terminal through the wireless terminal to be a relay terminal. The relay terminal and the data request destination terminal transmit a data packet including the requested data to the aggregation device in accordance with the communication requirement.
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公开(公告)号：US20170134833A1
公开(公告)日：2017-05-11
申请号：US15322359
申请日：2014-07-09
Applicant: HITACHI, LTD.
Inventor： Yasutaka SERIZAWA , Ryosuke FUJIWARA , Masayuki MIYAZAKI
CPC classification number: H04Q9/00 , G01D21/00 , G01V1/162 , G01V1/22 , G01V1/247 , H02J7/0047 , H02J7/0052 , H02J7/0063 , H02J7/025 , H02J50/12 , H02J50/80 , H02J2007/005 , H04B1/38 , H04Q2209/88 , H04W88/02
Abstract: It is necessary to increase the scale of a sensor network to achieve high resource exploration efficiency. On the other hand, since there are increasing needs to extend the area of an exploration region and to detect deeper geological stratum and crust structures more accurately, the large-scale sensor network needs to be operated for a long period of several weeks or longer. In order to solve the problem, a sensor unit needs to be turned on always to perform measurement always. However, an auxiliary measurement unit is activated intermittently since the auxiliary measurement unit needs to acquire data at necessary timings only. On the other hand, during collection and transmission of data and charging of a battery, a sensor terminal detects whether power is supplied from a data collection and charging device and automatically turns off the sensor unit and the auxiliary measurement unit to activate a data transmission unit. In this way, it is possible to ensure a long-term operation by reducing the power consumption during acquisition of vibration data, improve operation efficiency by automatically switching an operation mode, and accelerate data transmission.
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公开(公告)号：US20240255480A1
公开(公告)日：2024-08-01
申请号：US18370079
申请日：2023-09-19
Applicant: Hitachi, Ltd.
Inventor： Masuyoshi YAMADA , Yasutaka SERIZAWA , Hisanori MATSUMOTO
IPC: G01N33/00
CPC classification number: G01N33/0008
Abstract: An easy-to-maintain measurement system including a first sensor that measures a target and outputs a predetermined physical quantity, a second sensor that measures the target and outputs the same type as the predetermined physical quantity, and a processor configured to (1) acquire a first value from the first sensor and a second value from the second sensor, (2) convert the first value to the value of the physical quantity by a first calibration data, (3) calculate second calibration data for the second sensor from the second value and the predetermined physical quantity obtained in step (2), (4) convert the second value to the physical quantity by the second calibration data, and (5) detect the state of the measurement target by an estimation model and the physical quantity obtained in step (4).
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公开(公告)号：US20240022701A1
公开(公告)日：2024-01-18
申请号：US18218261
申请日：2023-07-05
Applicant: Hitachi, Ltd.
Inventor： Yasutaka SERIZAWA , Hisanori MATSUMOTO , Goichi ONO
IPC: H04N13/296 , G06V20/52 , G06T7/80
CPC classification number: H04N13/296 , G06V20/52 , G06T7/85 , G06T2207/30232 , G06T2207/30244
Abstract: The state monitoring system includes: a 3D camera configured to acquire an image in a work area; and information processing apparatus connected to the 3D camera and including a processing unit and a storage unit. The processing unit calculates a camera setting parameter that determines an imaging condition of the 3D camera with respect to a monitoring target as a target to be monitored in the work area and stores the camera setting parameter in the storage unit, determines the imaging condition of the 3D camera by applying the camera setting parameter corresponding to the monitoring target with reference to the camera setting parameter stored in the storage unit, acquires an image of the monitoring target from the 3D camera configured to image the monitoring target in the determined imaging condition, and determines a state of the monitoring target based on the acquired image of the monitoring target.
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Patent Agency Ranking
公开(公告)号：US20230031390A1
公开(公告)日：2023-02-02
申请号：US17391848
申请日：2021-08-02
Applicant: Hitachi, Ltd.
Inventor： Yasutaka SERIZAWA , Sudhanshu GAUR
IPC: G05B19/4155 , G06N20/00
Abstract: Example implementations described herein involve systems and methods that can involve extracting features from each of a plurality of time-series sensor data, the plurality of time-series sensor data associated with execution of one or more operations; clustering the extracted features into a plurality of tasks that occur from execution of the one or more operations, each of the plurality of tasks associated with a clustering identifier (ID) from the clustering; and calculating a cycle time of the cycle based on the initiation and end of the cycle recognized by referencing a cycle pattern model, wherein the cycle pattern model comprises configuration information of a cycle including a set from a plurality of the clustering IDs.
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6.发明申请Wireless Communication Device, Wireless Communication System, And Wireless Communication Control Method 审中-公开无线通信设备，无线通信系统和无线通信控制方法公开(公告)号：US20140078931A1
公开(公告)日：2014-03-20
申请号：US13903458
申请日：2013-05-28
Applicant: Hitachi, Ltd.
Inventor： Yasutaka SERIZAWA , Masayuki MIYAZAKI , Makoto KATAGISHI
IPC: H04W52/02
CPC classification number: H04W52/0216 , H04W52/0219 , Y02D70/22
Abstract: A wireless communication system is configured such that, during a period in which wireless communication is being performed between first and second wireless access points, wireless communication in a first wireless communication sub-network and a second wireless communication sub-network is made to stand by, and during the time other than the period in which wireless communication is being performed, wireless communication in at least one of the first wireless communication sub-network and the second wireless communication sub-network is performed.
Abstract translation: 无线通信系统被配置为使得在第一和第二无线接入点之间进行无线通信的时段期间，使第一无线通信子网中的无线通信和第二无线通信子网被置于 ，并且在进行无线通信的时段之外的时间期间，执行第一无线通信子网络和第二无线通信子网络中的至少一个的无线通信。
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公开(公告)号：US20200124572A1
公开(公告)日：2020-04-23
申请号：US16166596
申请日：2018-10-22
Applicant: Hitachi, Ltd.
Inventor： Yasutaka SERIZAWA , Sudhanshu GAUR , Yusuke SHOMURA
Abstract: Systems and methods described herein are directed to a specialized Internet of Things (IoT) device deploying both acoustic and radio wave signals. In example implementations described herein, camera data and acoustic sensor data is integrated to generate an acoustic sensor heatmap for the holistic sensing systems in an IoT area.
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公开(公告)号：US20180063805A1
公开(公告)日：2018-03-01
申请号：US15627791
申请日：2017-06-20
Applicant: HITACHI, LTD.
Inventor： Hisanori MATSUMOTO , Shiro MAZAWA , Yasutaka SERIZAWA
CPC classification number: H04W56/006 , G01S19/01 , G01S19/14 , G01S19/39 , G01V1/22 , G01V1/247 , G01V1/26 , G01V2200/12 , G08C17/02
Abstract: A time synchronization system includes: a position information acquisition unit configured to acquire installation position information related to an installation position of a time synchronization target whose time is synchronized; a time synchronization signal acquisition unit configured to receive a positioning signal transmitted from a positioning satellite as a time synchronization signal and acquire, from the time synchronization signal, transmission position information related a position of the positioning satellite and transmission time information at timing when the time synchronization signal is transmitted; and a signal processing unit configured to calculate synchronized time information for the time synchronization target based on the installation position information of the time synchronization target and the transmission position information and transmission time information from the time synchronization signal, and transmit the synchronized time information to the time synchronization target.
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公开(公告)号：US20160338099A1
公开(公告)日：2016-11-17
申请号：US15111917
申请日：2014-02-05
Applicant: HITACHI, LTD
Inventor： Yasutaka SERIZAWA , Masayuki MIYAZAKI , Kenichiro YAMANE , Tatsuki INUDUKA , Ryo NAKANO , Satoru HARADA
Abstract: In a multi-hop radio communication network including a base station (a radio station connected to a management server), each radio station in the network is given a data transmission opportunity in turn according to a predetermined transmission order, and transmits data via broadcast or multicast upon occurrence of transmission timing. The radio station having received the data adds data of the radio station to the received data and then forwards the packet via broadcast or multicast when it is the radio station's turn for transmission.
Abstract translation: 在包括基站（连接到管理服务器的无线电台）的多跳无线电通信网络中，网络中的每个无线电台根据预定的传输顺序依次被给予数据传输机会，并且经由广播或 发送发送定时时多播。 接收到该数据的无线电台将无线电台的数据添加到接收的数据，然后在无线电台的转弯时通过广播或组播转发分组。
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