供應意大利Eltra編碼器是將信號（如比特流）或數據進行編製、轉換為可用以通訊、傳輸和存儲的信號形式的設備。
編碼器把角位移或直線位移轉換成電信號，
前者稱為碼盤，後者稱為碼尺。按照讀出方式編碼器可以分為接觸式和非接觸式兩種；按照工作原理編碼器可分為增量式和式兩類。
增量式編碼器是將位移轉換成週期性的電信號，再把這個電信號轉變成計數脈衝，用脈衝的個數表示位移的大小。
式編碼器的每一個位置對應一個確定的數字碼，因此它的示值只與測量的起始和終止位置有關，而與測量的中間過程無關。
意大利Eltra編碼器主要分類：意大利Eltra編碼器可按以下方式來分類。
1、按碼盤的刻孔方式不同分類(1)增量型:就是每轉過單位的角度就發出一個脈衝信號(也有發正餘弦信號，
然後對其進行細分，斬波出頻率更高的脈衝)，
通常為A相、B相、Z相輸出，A相、B相為相互延遲1/4週期的脈衝輸出，
根據延遲關係可以區別正反轉，而且通過取A相、B相的上升和下降沿可以進行2或4倍頻；Z相為單圈脈衝，即每圈發出一個脈衝。
值型:就是對應一圈，每個基準的角度發出一個*與該角度對應二進制的數值，通過外部記圈器件可以進行多個位置的記錄和測量。
2、按信號的輸出類型分為:電壓輸出、集電極開路輸出、推拉互補輸出和長線驅動輸出。
3、以編碼器機械安裝形式分類(1)有軸型:有軸型又可分為夾緊法蘭型、同步法蘭型和伺服安裝型等。
(2)軸套型:軸套型又可分為半空型、全空型和大口徑型等。4、以編碼器工作原理可分為:光電式、磁電式和觸點電刷式。
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