发明名称 |
MOTOR ROTATION CONTROL METHOD, MOTOR ROTATION CONTROL DEVICE, AND MONITORING CAMERA UNIT EMPLOYING THE MOTOR ROTATION CONTROL DEVICE |
摘要 |
PROBLEM TO BE SOLVED: To correct non-uniformity in a rotation angle of a stepping motor simply and inexpensively without using any dedicated device. SOLUTION: A rotation control method for a motor that rotates a turnable lens barrel 3 at each fixed angle includes the steps of: scanning a test image including an identification reference line in a state where the lens barrel 3 stops turning; measuring a time t0 from the start of scanning to reach the identification reference line regarding a synchronizing signal of a predetermined order and storing the measured time in a memory means temporarily; turning the lens barrel 3 at the fixed angle; scanning the same test image and measuring a time t1 from the start of scanning to reach the identification reference line regarding the synchronizing signal of the same order; determining a time difference between the time t1 and the time t0; discriminating whether the time difference is set within an allowable time required for rotating the motor just at the fixed angle; and controlling power feeding to the motor on the basis of the discriminating result. COPYRIGHT: (C)2009,JPO&INPIT |
申请公布号 |
JP2009033689(A) |
申请公布日期 |
2009.02.12 |
申请号 |
JP20070198262 |
申请日期 |
2007.07.31 |
申请人 |
SANYO ELECTRIC CO LTD |
发明人 |
TANAKA YOSHIHISA |
分类号 |
H04N5/222;G03B15/00;G03B17/02;G03B17/56;H02P8/22 |
主分类号 |
H04N5/222 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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