SIEMENS西門子流量計(jì)7ML1001-2AB01-0AB2

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更新時(shí)間：2024-12-21
產(chǎn)品型號：
廠商性質(zhì)：經(jīng)銷商
所屬分類：德國SEMENS西門子
產(chǎn)品廠地：杭州市
訪問次數(shù)：892

詳情介紹

SIEMENS西門子流量計(jì)7ML1001-2AB01-0AB2

德國西門子SIEMENS超聲波流量計(jì)常用壓電換能器。它利用壓電材料的壓電效應(yīng)，采用適出的發(fā)射電路把電能加到發(fā)射換能器的壓電元件上，使其產(chǎn)生超聲波振勸。超聲波以某角度射入流體中傳播，然后由接收換能器接收，并經(jīng)壓電元件變?yōu)殡娔?，以便檢測。發(fā)射換能器利用壓電元件的逆壓電效應(yīng)，而接收換能器則是利用壓電效應(yīng)。
西門子超聲波流量計(jì)換能器的壓電元件常做成圓形薄片，沿厚度振動(dòng)。薄片直徑超過厚度的10倍，以保證振動(dòng)的方向性。壓電元件材料多采用鋯鈦酸鉛。為固定壓電元件，使超聲波以合適的角度射入到流體中，需把元件故人聲楔中，構(gòu)成換能器整體(又稱探頭)。聲楔的材料不僅要求強(qiáng)度高、耐老化，而且要求超聲波經(jīng)聲楔后能量損失小即透射系數(shù)接近1。常用的聲楔材料是有機(jī)玻璃，因?yàn)樗该?，可以觀察到聲楔中壓電元件的組裝情況。另外，某些橡膠、塑料及膠木也可作聲楔材料。

SIEMENS西門子流量計(jì)7ML1001-2AB01-0AB2

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