化工儀器網(wǎng)技術(shù)文章
亨士樂磁旋轉(zhuǎn)編碼器的工作原理
閱讀：1005 發(fā)布時(shí)間：2015-2-3磁旋轉(zhuǎn)編碼器主要由磁阻傳感器、充磁磁鼓,、信號處理電路和機(jī)械結(jié)構(gòu)部分組成,。它采用磁阻變化原理檢測微弱磁場信號的變化,。磁鼓刻錄成等間距的小磁極,，磁極被磁化后,，磁鼓在旋轉(zhuǎn)時(shí)能在周圍空間分布周期性變化的磁場。在一定的間距上,，這個(gè)磁場的Ｙ方向分量在每個(gè)磁極的正上方位置,，磁旋轉(zhuǎn)編碼器的值為零；在相鄰磁極的正中位置,，它的值為zui大。
磁鼓旋轉(zhuǎn)時(shí)磁阻元件由于具有磁阻效應(yīng),，磁旋轉(zhuǎn)編碼器的阻值會隨著磁場的改變而改變,，在外加電勢的作用下，變化的電阻值導(dǎo)致電阻上的電壓變化,，橋式電路的輸出端的電壓也就隨之發(fā)生變化,。因此，橋式電路的輸出信號和磁鼓的旋轉(zhuǎn)是緊密相聯(lián)的,。磁鼓每旋轉(zhuǎn)一個(gè)磁化長度,，磁場變化半周，信號輸出則變化一個(gè)周期,，磁鼓上磁極對的數(shù)量和輸出信號的周期數(shù)在旋轉(zhuǎn)一周時(shí)是相等的,。所以通過測定輸出信號的周期數(shù)或周期時(shí)間就可知道磁鼓的位置和旋轉(zhuǎn)速度了?？刹榭创判跃幋a器的更多介紹,。
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德國Hengstler亨士樂編碼器,Hengstler編碼器, 溫度控制器, 計(jì)時(shí)器,電子式計(jì)數(shù)器、機(jī)械式計(jì)數(shù)器,、安全繼電器