Patent ID: 8256276

Claim:
A ball movement path measuring method, comprising the steps of: preparing an operating unit and a measurement unit, said operating unit being an electronic apparatus having computing and display functions, said operating unit having stored in a memory therein the weight and size data of said ball, said measurement unit being a triaxial accelerometer connectable to said operating unit and adapted for transmitting the measured data to said operating unit; mounting said triaxial accelerometer in said ball for enabling said triaxial accelerometer to define XYZ triaxial space coordinates; obtaining the data of a initial position of the XYZ axes at a first measuring time and transmitting the data to said operating unit, and then obtaining the data of a reference position of the XYZ axes at least one second measuring time and then transmitting the data to said operating unit; comparing the reference position to the initial position and calculating the XYZ acceleration data after receipt of force subject to the contained angle between the coordinates data of the reference position and the coordinate data of the initial position, and then using the XYZ acceleration data and the data of the weight and size of the said object to calculate the force experienced by the said object.