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當前位置:首頁  >  技術文章  >  魏德米勒隔離器系統(tǒng)造成干擾的原因

魏德米勒隔離器系統(tǒng)造成干擾的原因

更新時間:2021-12-16      點擊次數:1311
  魏德米勒隔離器起到數據信號的隔離作用,將輸入的數據信號根據集成電路工藝解調轉換,隨后根據光感或磁感元器件實現隔離變換,隨后再開展解調轉換回隔離之前原的原數據信號或不一樣的數據信號,并且還會對隔離后數據信號的供電系統(tǒng)的電源實施隔離措施,確保轉換后的數據信號、電源、中間處于絕度獨立狀態(tài),提升輸入、輸出、電源中間的電氣設備隔離特性。

  魏德米勒隔離器之間的信號傳輸包括從微弱到毫伏級和毫安級的小信號;還有幾十伏、幾千伏、幾百安培的大信號;既有低頻直流信號,也有高頻脈沖信號。形成系統(tǒng)后,經常會發(fā)現地表與設備之間的傳輸相互干擾,導致系統(tǒng)不穩(wěn)定甚至誤操作。除了各個儀器設備本身的功能原因,比如抗電磁干擾,還有一個很重要的原因就是各種儀器設備都需要按照要求和意圖進行接地,比如為了安全,外殼需要接地。 ;為了使電路正常工作,系統(tǒng)需要有一個共同的參考點;為了抑制干擾和添加屏蔽,屏蔽也需要接地。但由于設備之間的表面與參考點之間存在電位差(即每個設備的公共位置不同),因此必須解決“地面循環(huán)”和“地面循環(huán)”的問題。系統(tǒng)對信號的處理。

  魏德米勒隔離器系統(tǒng)造成干擾的原因:
  在工業(yè)化生產全過程中完成監(jiān)控和操縱必須采用各種各樣儀器儀表、控制系統(tǒng)和電動執(zhí)行器,他們中間的信號傳送具有很弱到毫伏級、微安級的小信號,又有幾十伏,乃至數千伏、百余安培的大信號;具有低頻直流電信號,也是有高頻脈沖信號這些,組成系統(tǒng)后通常發(fā)覺在儀表和設備中間信號傳送相互之間干擾,導致系統(tǒng)不穩(wěn)定乃至操作失誤。出現這類狀況除開每一個儀表、設備自身的特性原因如抗干擾信號危害外,還有一個十分重要的要素便是因為儀表和設備中間的信號定位點中間存有電勢差,因此產生“接地環(huán)路”導致信號傳送全過程中失幀。因而,要為了確保平穩(wěn)和靠譜的運作,“接地環(huán)路”問題是在系統(tǒng)信號分析全過程中務必解決的問題。
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