METHOD FOR DETECTING MAGNITUDE OF ROTATIONAL VIBRATION GENERATED BY DISK ROTATION,申请号JP20010158964-传众专利搜索

METHOD FOR DETECTING MAGNITUDE OF ROTATIONAL VIBRATION GENERATED BY DISK ROTATION

申请公布号：JP2002197778(A)

申请号：JP20010158964

申请日期：2001.05.28

申请公布日期：2002.07.12

申请人：

SAMSUNG ELECTRO MECH CO LTD

发明人：JOUNG IL KWEON

分类号：G11B21/08;G11B7/085;G11B7/09;G11B7/095;G11B19/20;G11B19/28;(IPC1-7):G11B19/20

主分类号：G11B21/08

摘要：PROBLEM TO BE SOLVED: To take effective measures against noisy vibrations generated by an equipment by accurately detecting the magnitude of rotational vibrations due to the unbalance of a disk without adding a separate circuit such as a vibration sensor, etc. SOLUTION: This method includes a 1st stage where the number of traverse signals is counted at a low rotating speed of a recording medium, a 2nd stage where the number of traverse signals is counted at a high rotating speed of the disk after the 1st stage, a 3rd stage where the difference between the numbers of the traverse signals counted at the 1st and 2nd stages is calculated, and a 4th stage where the magnitude of rotational vibration is converted by using the difference in the number of the traverse signals calculated in the 3rd stage.