Patent ID: 7024284

Claim:
An anti-vibration system, comprising: a supporting member for supporting a driving mechanism; an acceleration sensor for detecting acceleration of said supporting member; a driving unit for driving said supporting member; a storing unit for memorizing offset data to be used for offsetting an output of said acceleration sensor; an offset unit for offsetting an output of said acceleration sensor in accordance with the offset data memorized in said storing unit; a control unit for producing a driving signal in relation to said driving unit, on the basis of an output of said offset unit; a renewing unit for renewing the offset data during a non-driving period of the driving mechanism, on the basis of an output of said acceleration sensor; a discrimination unit for discriminating whether the offset data should be renewed or not, during the non-driving period of the driving mechanism, on the basis of an output of said acceleration sensor, wherein said renewing unit renews the offset data in response to an affirmative discrimination result of said discrimination unit, and said discrimination unit performs discrimination again to the offset data renewed by said renewing unit to verify the offset data; and a notifying unit for notifying disorder provided that a negative discrimination result is not obtained after the discrimination is made a predetermined number of times by said discrimination unit.