Patent ID: 6157898
Filing Date: 2000-12-05
Classification: A63B,G01C,G01P,G01S,G07C

Abstract:
A measuring device comprising an object unit secured to a movable object, said object unit comprising:an acceleration sensor network that detects at least one spin event of said movable object;an electronic processor circuit connected to said acceleration sensor network;a radio transmitter connected to said electronic processor circuit; anda monitor unit external to said object unit comprisinga radio receiver wherein said object unit communicates with said monitor unit by sending from said radio transmitter at least one radio signal to said radio receiver,a monitor processor connected to said radio receiver, wherein said monitor processor determines motion characteristics of said movable object,an output display connected to said monitor processor, andan input keypad connected to said monitor processor;wherein said at least one radio signal further comprises an identification code derived from said object unit, wherein said monitor unit will only process said at least one radio signal when said at least one radio signal is a first radio signal received by said monitor unit after said monitor unit has been primed, and further wherein all subsequent radio signals having said identification code from said object unit will also be processed by said monitor unit and any of said all subsequent radio signals having a different identification code from a plurality of other object units will not be processed by said monitor unit.