Apparatus and method for measuring velocity perturbations in a fluid

    公开(公告)号:US12123894B2

    公开(公告)日:2024-10-22

    申请号:US16864698

    申请日:2020-05-01

    摘要: Apparatus and methods for measuring velocity perturbation in a fluid include one or more sensor vehicle adapted to be deployed in the fluid and a device that obtains position and acceleration data of each sensor vehicle. A physical model of the one or more sensor vehicle behaviour is used to transform the obtained data into a velocity field of the fluid, and output a map of the velocity field in the fluid. Sensor vehicles may be adapted to move passively through the fluid and/or to be transported by the fluid. The apparatus and methods may be used in liquid and gaseous environments, and the velocity field map may be used to track movement of species and particulate matter of interest in the fluid in real time.

    HYBRID ODOMETRY
    3.
    发明公开
    HYBRID ODOMETRY 审中-公开

    公开(公告)号:US20240210571A1

    公开(公告)日:2024-06-27

    申请号:US18392446

    申请日:2023-12-21

    申请人: u-blox AG

    IPC分类号: G01S19/52 G01S19/39 G01S19/49

    摘要: Methods and devices for odometry are disclosed. A previous position estimate and a current position estimate for a device are obtained. A current velocity estimate for the device is also obtained. A first distance estimate is calculated based on the position estimates, and a second distance estimate is calculated based on the velocity estimate. These two distance estimates are combined to generate a combined or hybrid distance estimate for the distance travelled by the device.

    System and method for determining accelerometer orientation

    公开(公告)号:US11852651B2

    公开(公告)日:2023-12-26

    申请号:US17275956

    申请日:2019-09-16

    IPC分类号: G01P15/18 G01S19/52

    CPC分类号: G01P15/18 G01S19/52

    摘要: Disclosed is a method for determining the installation orientation of an accelerometer system relative to a vehicle within which it has been installed. The method comprises obtaining a plurality of acceleration measurements within the co-ordinate frame of the accelerometer system and then analysing the distribution of these measurements to determine the relative installation orientation. In particular, the measurements can be grouped according to the vehicle movement phase at which they were obtained and the measurements within the groups then used to determine the lateral and horizontal planes of the vehicle.

    INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM

    公开(公告)号:US20230266483A1

    公开(公告)日:2023-08-24

    申请号:US18005190

    申请日:2021-05-27

    发明人: MASATO KIMISHIMA

    IPC分类号: G01S19/49 G01S19/52 G01C17/30

    CPC分类号: G01S19/49 G01C17/30 G01S19/52

    摘要: Provided is a more widely applicable speed calculation method. An information processing device includes a ground angular velocity calculation unit configured to calculate a ground angular velocity that is an angular velocity of a moving object relative to a ground by subtracting an Earth’s rotation angular velocity that is an angular velocity produced by an Earth’s rotation from a measured angular velocity that is an angular velocity measured by an inertial sensor provided in the moving object, and a ground speed calculation unit configured to calculate a ground speed that is a speed of the moving object relative to the ground on the basis of the ground angular velocity and a radius of gyration relating to movement of the moving object.