在線超聲波液位計

基本簡(jian)介(jie)

防爆型超(chao)聲波(bo)液位計　　超(chao)聲波(bo)液位計可(ke)采用二線制、三線(xian)制(zhi)或(huo)四線(xian)制(zhi)技術，二線(xian)制(zhi)為(wei)：供(gong)電(dian)(dian)與信(xin)號輸出共用；三線(xian)制(zhi)為(wei)：供(gong)電(dian)(dian)回路(lu)和信(xin)號輸出回路(lu)獨立，當采用直流24v供(gong)電(dian)(dian)時，可使用一根(gen)3芯電(dian)(dian)纜(lan)線(xian)，供(gong)電(dian)(dian)負(fu)端和信(xin)號輸出(chu)負(fu)端共用一根芯(xin)線(xian)；四線(xian)制為(wei)：當(dang)采(cai)用交(jiao)流(liu)220v供(gong)電(dian)(dian)時，或者(zhe)當(dang)采(cai)用直流(liu)24v供(gong)電(dian)(dian)，要求供(gong)電(dian)(dian)回路(lu)與信(xin)號輸出(chu)回路(lu)*隔離(li)時，應使用一根4芯(xin)電(dian)(dian)纜(lan)線(xian)。直流(liu)或交(jiao)流(liu)供(gong)電(dian)(dian)，具有4~20mADC，高(gao)低(di)位(wei)開關(guan)量輸出(chu)。

　　量(liang)程范圍：0-50米，多(duo)種形式(shi)可選，適合各種腐蝕性(xing)、化工(gong)類場合，精度高(gao)，遠傳信號輸出，PLC系統監(jian)控。

在線超聲波液位計

工作原理(li)

工作原理(li)

      超聲波(bo)液(ye)位(wei)計工(gong)作原理如圖(tu)所示,超聲波(bo)液(ye)位(wei)計一(yi)般采(cai)用收(shou)發合一(yi)的陶瓷(ci)超聲波(bo)換能器(qi),聲波(bo)(bo)的發射和(he)接收都由(you)同一個探頭完(wan)成。探頭向被測液面發射超(chao)聲波(bo)(bo)信(xin)號(hao),超(chao)聲波(bo)(bo)由(you)探頭經傳播介質(zhi)傳播至(zhi)被測液面,在液面上(shang)形成反射,反射波沿原路(lu)徑傳播至(zhi)探頭,被探頭接收(shou)

超(chao)聲(sheng)波液位(wei)計可采(cai)用(yong)(yong)二線制(zhi)(zhi)、三線制(zhi)(zhi)或四(si)線制(zhi)(zhi)技(ji)術，二線制(zhi)(zhi)為：供(gong)電(dian)(dian)(dian)與(yu)信(xin)號(hao)輸出(chu)(chu)共用(yong)(yong)；三線制(zhi)(zhi)為：供(gong)電(dian)(dian)(dian)回(hui)(hui)路和信(xin)號(hao)輸出(chu)(chu)回(hui)(hui)路獨立，當(dang)采(cai)用(yong)(yong)直流24v供(gong)電(dian)(dian)(dian)時(shi)，可使用(yong)(yong)一(yi)根3芯電(dian)(dian)(dian)纜線，供(gong)電(dian)(dian)(dian)負(fu)(fu)端和信(xin)號(hao)輸出(chu)(chu)負(fu)(fu)端共用(yong)(yong)一(yi)根芯線；四(si)線制(zhi)(zhi)為：當(dang)采(cai)用(yong)(yong)交流220v供(gong)電(dian)(dian)(dian)時(shi)，或者當(dang)采(cai)用(yong)(yong)直流24v供(gong)電(dian)(dian)(dian)，要求供(gong)電(dian)(dian)(dian)回(hui)(hui)路與(yu)信(xin)號(hao)輸出(chu)(chu)回(hui)(hui)路*隔離時(shi)，應使用(yong)(yong)一(yi)根4芯電(dian)(dian)(dian)纜線。直流或交流供(gong)電(dian)(dian)(dian)，具(ju)有4~20mADC，高低位(wei)開(kai)關量輸出(chu)(chu)。