Calibration method and sports equipment

• US 10,088,496 B2
• Filed: 12/07/2015
• Issued: 10/02/2018
• Est. Priority Date: 08/27/2015
• Status: Active Grant

• Current Assignee: Wistron Corporation
• Original Assignee: Wistron Corporation
• Inventors: Lin, Zhao-Yuan, Ko, Ming-Chih
• Primary Examiner(s): Caputo, Lisa
• Assistant Examiner(s): Roberts, Herbert K
• Application Number:
  US14/961,833
• Publication Number:
  US 20170056723A1
• Time in Patent Office: 1,030 Days
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A63B 53/00 Golf clubs
• CPC Class Codes: A63B 60/46 Measurement devices associated with golf clubs, bats, rackets or the like for measuring physical parameters relating to sporting activity, e.g. baseball bats with impact indicators or bracelets for measuring the golf swing
• CPC Class Codes: G01C 25/00 Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass testing, calibrating or compensating compasses G01C17/38
• CPC Class Codes: G01C 25/005 initial alignment, calibration or starting-up of inertial devices
• CPC Class Codes: G01P 15/18 in two or more dimensions
• CPC Class Codes: G01P 21/00 Testing or calibrating of apparatus or devices covered by the preceding groups
• CPC Class Codes: G06V 40/23 Recognition of whole body movements, e.g. for sport training
• CPC Class Codes: G09B 19/0038 Sports

Abstract

A calibration method for a first accelerometer is disclosed. The first accelerometer is installed together with a second accelerometer in a device. The calibration method includes the second accelerometer measuring a first set of X, Y, Z accelerations in a Cartesian coordinate system, the first accelerometer measuring a second set of X, Y, Z accelerations in the Cartesian coordinate system, indicating to rotate the device, the second accelerometer measuring a third set of X, Y, Z accelerations in the Cartesian coordinate system, the first accelerometer measuring a fourth set of X, Y, Z accelerations in the Cartesian coordinate system, and calibrating X, Y, Z acceleration values measured by the first accelerometer based on the first, second, third and fourth sets of X, Y, Z accelerations.

Claims

1. A sports equipment, comprising:

a shaft;

a head, installed at one end of the shaft, comprising;

a first accelerometer;

a second accelerometer;

a processing means;

a storage unit, for storing a program code, wherein the program code is utilized for instructing the processing means to perform a calibration process; and

an interface unit, for outputting data; and

an indicative button, for activating the calibration process, wherein the calibration process only involves measurements of four sets of X, Y, Z accelerations in a Cartesian coordinate system, and comprises;

instructing the second accelerometer to measure a first set of X, Y, Z accelerations in the Cartesian coordinate system;

instructing the first accelerometer to measure a second set of X, Y, Z accelerations in the Cartesian coordinate system;

driving the indicative button to display a signal, wherein the signal is utilized for indicating to rotate the head;

instructing the second accelerometer to measure a third set of X, Y, Z accelerations in the Cartesian coordinate system;

instructing the first accelerometer to measure a fourth set of X, Y, Z accelerations in the Cartesian coordinate system;

calibrating X, Y, Z acceleration values measured by the first accelerometer according to the first, second, third and fourth sets of X, Y, Z accelerations; and

instructing the interface unit to output the calibrated X, Y, Z acceleration values;

wherein the first accelerometer is a high gravity accelerometer, and the second accelerometer is a low gravity accelerometer.

2. The sports equipment of claim 1, wherein the calibration process further comprises:

instructing the interface unit to output the first, second, third and fourth sets of X, Y, Z accelerations.

3. The sports equipment of claim 1, wherein:

the first set comprises a first X acceleration XLow1, a first Y acceleration YLow1 and a first Z acceleration ZLow1;

the second set comprises a second X acceleration XHigh1, a second Y acceleration YHigh1 and a second Z acceleration ZHigh1;

the third set comprises a third X acceleration XLow2, a third Y acceleration YLow2 and a third Z acceleration ZLow2; and

the fourth set comprises a fourth X acceleration XHigh2, a fourth Y acceleration YHigh2 and a fourth Z acceleration ZHigh2.