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超聲波明渠流量計 我有新說法
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  超聲波明渠流量計與量水堰槽配合使用,測量明渠內(nèi)水的流量。主要用于測量污水廠、企事業(yè)單位的污水排放口、城市下水道的流量及農(nóng)田水利中的渠道等。

  由于本公司儀表采用超聲波穿過空氣,以非接觸的方法測量。因此在粘污、腐蝕性液體條件下,比接觸式的儀表,具有更高的可靠性和耐用性。

  一、用途

  超聲波明渠流量計與量水堰槽配合使用,測量明渠內(nèi)水的流量。主要用于測量污水廠、企事業(yè)單位的污水排放口、城市下水道的流量及農(nóng)田水利中的渠道等。

  由于本公司儀表采用超聲波穿過空氣,以非接觸的方法測量。因此在粘污、腐蝕性液體條件下,比接觸式的儀表,具有更高的可靠性和耐用性。

  超聲波測水位原理

  發(fā)射超聲換能器發(fā)射出的超聲脈沖,通過傳播媒質(zhì)傳播到被測液面,經(jīng)反射后再通過傳聲媒質(zhì)返回到接收換能器,測出超聲脈沖從發(fā)射到接收在傳聲媒質(zhì)中傳播的時間。再根據(jù)傳聲媒質(zhì)中的聲速,就可以算得從換能器到液面的距離。從而確定液位。因此我們可以計算出探頭到反射面的距離D=C*t/2(除以2是因為聲波從發(fā)射到接收實際是一個來回,D是距離,C是聲速,t是時間)。再通過減法運算就可得出液位值。

  量水堰槽的測流量原理

  流通順暢的明渠內(nèi)流量越大,液位越高;流量越小,液位越低(如下圖)。通過測量水位可以推算出流量。普通明渠內(nèi)流量與水位之間的對應(yīng)關(guān)系,受渠道的坡降比和表面的糙度影響。在渠道內(nèi)安裝量水堰槽,產(chǎn)生節(jié)流作用,使明渠內(nèi)的流量與液位有固定的對應(yīng)關(guān)系,這種對應(yīng)關(guān)系主要取決于量水堰槽的構(gòu)造尺寸,把渠道的影響盡可能減小。

  測量范圍:0.1升/秒~99999.99米/小時,根據(jù)不同的堰槽來確定。

  累計流量大為:4290000000.00立方米

  液位大量程:1米,2米,5米,10米四種,更大范圍,需要定做。

  液位測量精度:0.5%

  分辨率:3mm或0.1%(取大者)

  顯示:中文液晶顯示

  流量測量精度:符合國標(biāo)要求的巴歇爾槽、三角堰是1~5%。

  符合國標(biāo)要求的矩形堰是10%

  非標(biāo)堰槽是10~50%。

參考資料

參考資料編輯區(qū)域


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