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Method and device for measuring speed of moving device

  • US 10,363,471 B2
  • Filed: 09/12/2016
  • Issued: 07/30/2019
  • Est. Priority Date: 04/11/2016
  • Status: Active Grant
First Claim
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1. A method for measuring a speed of a sports device, comprising:

  • acquiring, by a sensor disposed at a bottom of the sports device, movement data of the sports device during a process of tracking the sports device;

    transmitting the movement data wirelessly to a terminal;

    calculating, by the terminal, a linear speed and a tangential speed of rotational movement of the sports device based on accelerations of three axes in the movement data; and

    combining, by the terminal, the linear speed and the tangential speed of the rotational movement to obtain a movement speed of the sports device,wherein the accelerations of three axes comprises an acceleration of Z axis, an acceleration of X axis, and an acceleration of Y axis, and the Z axis is parallel to a length direction of the sports device, and the X axis and the Y axis are perpendicular to the Z axis,wherein the linear speed is obtained from the acceleration of X axis and the acceleration of Y axis, and the tangential speed of the rotational movement is obtained from the acceleration of Z axis, andwherein the linear speed and the tangential speed of the rotational movement is combined to obtain the movement speed of the sports device by;


    v=nv1+mvn where v denotes the movement speed of the sports device, V1 denotes the linear speed, Vn denotes the tangential speed of the rotational movement, n and m respectively denote a weight, and n+m=1.

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