초록 ▼

A device for measuring a movable object, such as a baseball, football, hockey puck, soccer ball, tennis ball, bowling ball, or a golf ball. Part of the device, called the object unit, is embedded, secured, or attached to the movable object of interest, and has a spin detection circuit, electronic pr

A device for measuring a movable object, such as a baseball, football, hockey puck, soccer ball, tennis ball, bowling ball, or a golf ball. Part of the device, called the object unit, is embedded, secured, or attached to the movable object of interest, and has a spin detection circuit, electronic processor circuit, magnetic field sensor circuit, and a radio transmitter. The other part of the device, called the monitor unit, is held or worn by the user and serves as the user interface for the device. The monitor unit has a radio receiver, a processor, an input keypad, and an output display that shows the various measured motion characteristics of the movable object, such as the time of flight, speed, trajectory height, spin rate, or curve of the movable object, and allows the user to input data to the device.

대표청구항 ▼

[ What is claimed is:] [1.] A measuring device secured to a movable object, said measuring device comprising:a first magnetic field sensor for providing an output indicative of a change of alignment between said movable object and the earth's magnetic field;an electronic processor circuit connected

[ What is claimed is:] [1.] A measuring device secured to a movable object, said measuring device comprising:a first magnetic field sensor for providing an output indicative of a change of alignment between said movable object and the earth's magnetic field;an electronic processor circuit connected to said output of said first magnetic field sensor, wherein said electronic processor circuit determines motion characteristics of said movable object from said output of said first magnetic field sensor; andan output display connected to said electronic processor circuit, for displaying said motion characteristics determined by said electronic processor circuit.