Patent ID: 7256505
Filing Date: 2007-08-14
Classification: B60C,G01D,G01L,G01M,H02J,H02K,H02N

Abstract:
1. A device, comprising: a rotatable shaft mounted for rotating around an axis; an energy harvesting device having a first portion and a second portion, said first portion mounted to rotate with said rotatable shaft, said second portion mounted on fixed supports relative to said rotatable shaft so as to be non-rotatable around said axis when said rotatable shaft rotates around said axis, said energy harvesting device for converting motion of said first portion with respect to said second portion into electricity; and a radio frequency communications device mounted to rotate with said rotatable shaft, said radio frequency communications device connected to be powered with electricity derived from said first portion, wherein all electricity for powering said radio frequency communications device is derived from said first portion.