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P69壓力變送器工作原理:
壓力(li)變送器選用(yong)進口壓力(li)芯片,敏感元(yuan)件采用(yong)擴散(san)或(huo)離子(zi)注(zhu)入等工(gong)藝(yi)形(xing)(xing)成(cheng)(cheng)電阻(zu)并連(lian)接成(cheng)(cheng)惠斯(si)通電橋,用(yong)微(wei)機(ji)械加工(gong)技術在電橋下形(xing)(xing)成(cheng)(cheng)壓力(li)敏感膜(mo)片。當壓力(li)作用(yong)在膜(mo)片上(shang)時,電阻(zu)值發生(sheng)變化并且產生(sheng)一(yi) 個與作用(yong)壓力(li)成(cheng)(cheng)正比(bi)的線(xian)性化輸出(chu)信(xin)號。我(wo)們在惠斯(si)通電橋上(shang)加上(shang)直(zhi)流(liu)電源,就(jiu)會(hui)產生(sheng)一(yi)個直(zhi)流(liu)電壓信(xin)號的輸出(chu)。經(jing)過二次(ci)轉換線(xian)路(lu),實現(xian)兩線(xian)制4~20MA輸出(chu)。