Device for detecting speed of mainshaft of CD drive |
Title： |
| Device for detecting speed of mainshaft of CD drive |
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Application Number： |
200710074150 |
Application Date： |
2007/04/24 |
Announcement Date： |
2007/12/05 |
Pub. Date： |
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Publication Number： |
101083102 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
94[] |
IPC： |
G11B 19/28G11B 19/20 |
Applicant(s)： |
Graduate School at Shenzhen, Tsinghua University |
Inventor(s)： |
Ma Jianshe, Wang Shuoshi, Wang Yuxiu, Shi Hongwei, Zhang Buqing, Cheng Xuemin, Mao Leshan, Qi Guosheng, Pan Longfa, Yan Shuang, Sun Manlong, Yang Mingsheng |
Key Words： |
CD drive, mainshaft, speed, detecting |
Abstract： |
The invention discloses a rotary speed detecting device of main shaft of disc drive, which comprises the following parts: detecting element to switch the rotary speed signal to electric pulse, subsequent disposing circuit to switch the electric pulse output by detecting element into rotary speed information, wherein the detecting element is magnetioelectric rotary speed sensor, which detects the rotary speed of main shaft of the disc driver and transforms the rotary speed into disposable electric signal. The invention reduces the cost of detecting device under affirming the precision, which can measure the rotary information of disc driver. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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