A16B-2201-0811

A16B-2201-0811簡單說下編碼原理和位置測量

光電編碼器是在一個很薄很輕的圓盤子上，通過緊密儀器來腐蝕雕刻了很多條細(xì)小的縫，相當(dāng)于把一個360度，細(xì)分成很多等分，比如成1024組，這樣每組之間的角度差是360/1024度=0.3515625度。

然后有個精密的發(fā)光源，安裝在碼盤的一面，碼盤的另外一面，會有個接收器之類的，使用了光敏電阻這些元件加放大和整形電路組成，這樣碼盤轉(zhuǎn)動時候，有縫隙的地方會透光過去，接收器會瞬間收到光脈沖，經(jīng)過電路處理后，輸出一個電脈沖信號，這樣碼盤旋轉(zhuǎn)了一周，會對應(yīng)輸出1024個脈沖，第一個脈沖位置如果是0，第二個脈沖位置就是0.3515625°，第三個脈沖位置是0.3515625°*2，以此類推，這樣只要有儀器能讀到脈沖個數(shù)，就可以知道碼盤對應(yīng)在什么位置了，如果把編碼器安裝到電機(jī)的軸上，電機(jī)軸和碼盤是剛性連接，兩者的位置關(guān)系會一一對應(yīng)，通過讀編碼器脈沖，就可以知道電機(jī)的軸位置。

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