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EPRO振動(dòng)傳感器，PR9268／300-000
EPRO振動(dòng)傳感器用于測(cè)量振動(dòng)
工作溫度可達(dá) 200 °C
易于安裝
高靈敏度
堅(jiān)固的外殼適合工業(yè)應(yīng)用
防水保護(hù)等級(jí)： IP 55 resp. IP 65
兩種頻率范圍: 10 Hz - 1000 Hz 4 Hz - 1000 Hz
連接安全柵 (zone 1)防爆等級(jí) EEx ib II B / II C
是 MMS 6000 和 MMS 3000 旋轉(zhuǎn)機(jī)械監(jiān)測(cè)保護(hù)系統(tǒng)的一部分
振動(dòng)傳感器在測(cè)試技術(shù)中是關(guān)鍵部件之一，它的作用主要是將機(jī)械量接收下來(lái)，并轉(zhuǎn)換為與之成比例的電量。由于它也是一種機(jī)電轉(zhuǎn)換裝置。所以我們有時(shí)也稱(chēng)它為換能器、拾振器等。
德國(guó)EPRO振動(dòng)傳感器并不是直接將原始要測(cè)的機(jī)械量轉(zhuǎn)變?yōu)殡娏浚菍⒃家獪y(cè)的機(jī)械量做為振動(dòng)傳感器的輸入量，然后由機(jī)械接收部分加以接收，形成另一個(gè)適合于變換的機(jī)械量，zui后由機(jī)電變換部分再將變換為電量。因此一個(gè)傳感器的工作性能是由機(jī)械接收部分和機(jī)電變換部分的工作性能來(lái)決定的。
1、相對(duì)式機(jī)械接收原理
由于機(jī)械運(yùn)動(dòng)是物質(zhì)運(yùn)動(dòng)的zui簡(jiǎn)單的形式，因此人們zui先想到的是用機(jī)械方法測(cè)量振動(dòng)，從而制造出了機(jī)械式測(cè)振儀(如蓋格爾測(cè)振儀等)。傳感器的機(jī)械接收原理就是建立在此基礎(chǔ)上的。相對(duì)式測(cè)振儀的工作接收原理是在測(cè)量時(shí)，把儀器固定在不動(dòng)的支架上，使觸桿與被測(cè)物體的振動(dòng)方向一致，并借彈簧的彈性力與被測(cè)物體表面相接觸，當(dāng)物體振動(dòng)時(shí)，觸桿就跟隨它一起運(yùn)動(dòng)，并推動(dòng)記錄筆桿在移動(dòng)的紙帶上描繪出振動(dòng)物體的位移隨時(shí)間的變化曲線(xiàn)，根據(jù)這個(gè)記錄曲線(xiàn)可以計(jì)算出位移的大小及頻率等參數(shù)。
由此可知，相對(duì)式機(jī)械接收部分所測(cè)得的結(jié)果是被測(cè)物體相對(duì)于參考體的相對(duì)振動(dòng)，只有當(dāng)參考體不動(dòng)時(shí)，才能測(cè)得被測(cè)物體的振動(dòng)。這樣，就發(fā)生一個(gè)問(wèn)題，當(dāng)需要測(cè)的是振動(dòng)，但又找不到不動(dòng)的參考點(diǎn)時(shí)，這類(lèi)儀器就無(wú)用武之地。例如:在行駛的內(nèi)燃機(jī)車(chē)上測(cè)試內(nèi)燃機(jī)車(chē)的振動(dòng)，在地震時(shí)測(cè)量地面及樓房的振動(dòng)……，都不存在一個(gè)不動(dòng)的參考點(diǎn)。在這種情況下，我們必須用另一種測(cè)量方式的測(cè)振儀進(jìn)行測(cè)量，即利用慣性式測(cè)振儀。
EPRO振動(dòng)傳感器，PR9268／300-000
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EPRO振動(dòng)傳感器，PR9268／300-000