德國西門子SIEMENS流量計* 我公司在東莞南城區(qū)旺南路旺南大廈14樓13A11,地處繁華路段,臨近富民步行街與金融街。歡迎您來我公司!
SIEMENS管段式超聲波流量儀表是以“速度差法”為原理,測量圓管內(nèi)液體流量的儀表。它采用了良好的多脈沖技術(shù)、信號數(shù)字化處理技術(shù)及糾錯技術(shù),使流量儀表更能適應工業(yè)現(xiàn)場的環(huán)境,計量更方便、經(jīng)濟、準確。產(chǎn)品達到*水平,可廣泛應用于石油、化工、冶金、電力、給排水等領(lǐng)域。
SIEMENS超聲波流量計是通過檢測流體流動對超聲束(或超聲脈沖)的作用以測量流量的儀表。
SIEMENS超聲流量計和超聲波流量計一樣,因儀表流通通道未設(shè)置任何阻礙件,均屬*流量計,是適于解決流量測量困難問題的一類流量計,特別在大口徑流量測量方面有較突出的優(yōu)點,它是發(fā)展迅速的一類流量計之一。
SIEMENS超聲波流量計采用時差式測量原理:一個探頭發(fā)射信號穿過管壁、介質(zhì)、另一側(cè)管壁后,被另一個探頭接收到,同時,第二個探頭同樣發(fā)射信號被*個探頭接收到,由于受到介質(zhì)流速的影響,二者存在時間差Δt,根據(jù)推算可以得出流速V和時間差Δt之間的換算關(guān)系V=(C2/2L)×Δt,進而可以得到流量值Q、
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德國西門子SIEMENS流量計*
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SIEMENS超聲波流量計換能器的壓電元件常做成圓形薄片,沿厚度振動。薄片直徑超過厚度的10倍,以保證振動的方向性。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玻璃,因為它透明,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。
德國西門子SIEMENS流量計*