Patent ID: 7580809

Claim:
A device detecting a motional position of an object in motion, said device comprising: a first unit (i) repeatedly producing absolute positional information indicative of the motional position of the object in response to a change in the motional position of the object, the change reflecting therein a motion of the object and the positional information being pulsed information, and (ii) repeatedly transmitting the produced absolute positional information every time when the change in the motional position of the object reaches a given unit quantity of the change; and a second unit (i) repeatedly receiving the absolute positional information transmitted from the first unit and (ii) repeatedly calculating the motional position of the object based on a predetermined procedure including repeatedly counting a starting edge of the absolute positional information to be received wherein the second unit includes means for correcting the calculated motional position of the object on the basis of the absolute positional information.