Patent ID: 8352210

Claim:
A wheel-hub mountable odometer comprising: a housing that is adapted that be coupled to a wheel of a vehicle; at least a first, accelerometer and a second accelerometer mounted within said housing that each sense a force acting thereon and generate an electrical signal representative of said sensed force, said first accelerometer mounted at a first distance from said second accelerometer, each of the first and second accelerometers, when said housing is coupled to a vehicle wheel, being an unknown distance away from the center of rotation of the vehicle wheel; a controller mounted within said housing that is interconnected to said accelerometers that (i) receives electrical signals representative of said sensed forces acting on each accelerometer, (ii) calculates distances between said accelerometers and the center of rotation based on the electrical signals and said first distance, and (iii) calculates wheel rotations based on the electrical signals and said calculated distances; and a power source mounted within said housing that provides operating power to said accelerometers and said controller.