发明名称 |
A speed detecting device. |
摘要 |
<p>A speed detecting device comprises an optical pattern (7a) formed on a moving member; pairs of a light emitting means (5) and a light receiving means (6) disposed on a stationary member; a signal means (4) which generates periodic wave signals from the outputs of the light receiving means (6), the periodic wave signals being different in phase; a differential means (9a-9d) which differentiates the periodic wave signals to produce differentiated signals different in phase; a comparing means (10a,10b) which produces comparison signals from combinations of the periodic wave signals, the comparison signals being different in phase; a peak signal means (11a,11b,12a-12d) which produces peak signals from the comparison signals corresponding respectively to the peak regions of the differentiated signals; and a selection means (13a-13d) which selectively outputs the peak regions of the differentiated signals in accordance with the peak signals.</p> |
申请公布号 |
EP0323905(A2) |
申请公布日期 |
1989.07.12 |
申请号 |
EP19890300076 |
申请日期 |
1989.01.05 |
申请人 |
SHARP KABUSHIKI KAISHA |
发明人 |
NOMURA, MASARU;MATOBA, HIROTSUGU;KOJIMA, KUNIO;DEGUCHI, TOSHIHISA;TERASHIJMA, SHIGEO |
分类号 |
G01P3/36;G01P3/46 |
主分类号 |
G01P3/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|