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    PROCEDURE FOR TRACKING RADIO EQUIPPED VEHICLES WITHOUT ODOMETER
    1.
    发明申请
    PROCEDURE FOR TRACKING RADIO EQUIPPED VEHICLES WITHOUT ODOMETER 审中-公开

    公开(公告)号：US20190185035A1

    公开(公告)日：2019-06-20

    申请号：US16223459

    申请日：2018-12-18

    申请人： ALSTROM Transport Technologies

    发明人： Javier BALLESTEROS

    IPC分类号： B61L25/02 ,  G01S19/50 ,  B61L25/04

    CPC分类号： B61L25/025 ,  B61L25/04 ,  B61L27/0061 ,  B61L2205/04 ,  G01S19/50

    摘要： A method for locating a railway vehicle in a railway network, including first detection devices detecting the passage of a railway vehicle in a first perimeter, second detection devices detecting the passage of a railway vehicle in a second perimeter and a centralized server, includes the following steps: detection, by one of the first detection devices, of the passage of the railway vehicle and sending of a first detection signal; detection, by one of the second detection devices, of the passage of the railway vehicle and sending of a second detection signal; and reception of the signals by the centralized server and determination of the position of the railway vehicle on the railway network by intersection of the first perimeter and the second perimeter.

    RAILWAY POSITIONING METHOD AND SYSTEM
    2.
    发明申请
    RAILWAY POSITIONING METHOD AND SYSTEM 审中-公开

    公开(公告)号：US20180259649A1

    公开(公告)日：2018-09-13

    申请号：US15761422

    申请日：2016-09-02

    申请人： THALES

    发明人： Marc REVOL

    IPC分类号： G01S19/40 ,  G01S19/43 ,  G01S19/49 ,  G01S19/50 ,  G01S19/29 ,  G01S19/24

    CPC分类号： G01S19/40 ,  G01S19/14 ,  G01S19/246 ,  G01S19/29 ,  G01S19/43 ,  G01S19/48 ,  G01S19/49 ,  G01S19/50

    摘要： A railway positioning method, based on the movement of a train determined by a signal receiver of a satellite navigation system embedded onboard the train, and on the movement of the train determined by an odometer embedded onboard the train, and a map of the railway tracks, by determination of the ionospheric propagation bias corresponding to a propagation bias of the signal carrier phase of the satellite navigation system, comprises the steps of, by line of sight of the satellites of the navigation system: estimating the biased ionospheric drift by difference between an integrated Doppler term determined by the receiver and a biased estimation of the movement of the train by the odometer; estimating the odometer drift bias and the drift bias of the local clock of the receiver, by least squares resolution of the speed determined by the satellite navigation system, of the drift bias of the local clock of the receiver, and of the odometer drift bias; correcting the estimation of the ionospheric drift, by subtraction of the estimated odometer drift bias; and correcting the integrated Doppler term using the drift bias of the local clock of the receiver and the ionospheric drift bias, and correcting the pseudo-distance deviations using the ionospheric drift bias.

    Navigation device
    5.
    发明授权
    Navigation device 有权

    公开(公告)号：US09976861B2

    公开(公告)日：2018-05-22

    申请号：US14982727

    申请日：2015-12-29

    申请人： Alpine Electronics, Inc.

    发明人： Reiji Shionoya

    IPC分类号： G01C21/34 ,  G01C21/30 ,  G01S19/39 ,  G01S19/50

    CPC分类号： G01C21/34 ,  G01C21/30 ,  G01S19/39 ,  G01S19/50

    摘要： A current location measured by a GPS receiver is defined as a base location. Individual points fairly near to the base location that are located on roads whose distances from the base location fall within a predetermined distance are set as candidate points. A distance between the base location and a candidate point to be evaluated is calculated. In a case where the distance is larger than a threshold value statistically estimated from a history of calculated distances between the base location and previously set candidate points that draw a trajectory on a road leading to the candidate point to be evaluated, the threshold value defining a rough upper limit of a distribution range of distances between the base location and the candidate points, it is judged that a true current location is not located on the road in which the candidate point is located.

    Adaptive synthetic positioning
    9.
    发明授权
    Adaptive synthetic positioning 有权

    公开(公告)号：US09671502B2

    公开(公告)日：2017-06-06

    申请号：US14819823

    申请日：2015-08-06

    申请人： Samsung Electronics Co., Ltd.

    发明人： Mohamed Youssef ,  Andi Jakupi ,  Bruce McCullough ,  William Stewart

    IPC分类号： G01C21/00 ,  G01S19/48 ,  G06F17/30 ,  G01C21/28 ,  G01S19/50

    CPC分类号： G01S19/48 ,  G01C21/28 ,  G01S19/50 ,  G06F17/30241

    摘要： Methods, systems, and portable devices capable of adaptive synthetic positioning while in a dead zone are described. In one method, when a portable device having a Global Navigational Satellite System (GNSS) receiver and a dead zone database enters a dead zone, it determines whether the dead zone database has a record for the dead zone. If it does, it retrieves parameters corresponding to the dead zone from the database and calculates synthetic position solutions using the retrieved parameters while in the dead zone. The portable device may also use the synthetic position solutions to help calculate position solutions when exiting the dead zone. If a dead zone database record does not exist, the portable device determines parameters for calculating synthetic position solutions in the dead zone and a new dead zone database record indicating a set of parameters based on the determined set of parameters is created.