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 壓力變(bian)送(song)器是工業(ye)實踐中最為(wei)常用(yong)的(de)(de)(de)一種(zhong)傳(chuan)感(gan)器，其廣(guang)泛應(ying)用(yong)于各種(zhong)工業(ye)自控(kong)環境，涉及水(shui)利水(shui)電、鐵路交通、智(zhi)能建筑(zhu)、生產自控(kong)、航空(kong)航天、軍工、石化(hua)、油井、電力、船舶(bo)、機(ji)床(chuang)、管道等眾多(duo)行業(ye)。壓力變(bian)送(song)器有電動(dong)式(shi)(shi)和(he)氣動(dong)式(shi)(shi)兩大類。電動(dong)式(shi)(shi)的(de)(de)(de)統一輸出(chu)信號為(wei)0～10mA、4～20mA或1～5V等直流電信號。氣動(dong)式(shi)(shi)的(de)(de)(de)統一輸出(chu)信號為(wei)20～100Pa的(de)(de)(de)氣體壓力。壓力變(bian)送(song)器按不同的(de)(de)(de)轉(zhuan)換原理(li)可分(fen)為(wei)力(力矩(ju))平衡式(shi)(shi)、電容式(shi)(shi)、電感(gan)式(shi)(shi)、應(ying)變(bian)式(shi)(shi)和(he)頻率(lv)式(shi)(shi)等。

工作原理

壓力(li)(li)變(bian)(bian)(bian)(bian)(bian)(bian)送器感受壓力(li)(li)的(de)(de)電(dian)器元件一(yi)(yi)般(ban)為電(dian)阻(zu)應(ying)變(bian)(bian)(bian)(bian)(bian)(bian)片(pian)(pian)，電(dian)阻(zu)應(ying)變(bian)(bian)(bian)(bian)(bian)(bian)片(pian)(pian)是一(yi)(yi)種(zhong)將被測件上的(de)(de)壓力(li)(li)轉換成為一(yi)(yi)種(zhong)電(dian)信號(hao)的(de)(de)敏感器件。電(dian)阻(zu)應(ying)變(bian)(bian)(bian)(bian)(bian)(bian)片(pian)(pian)應(ying)用最(zui)多的(de)(de)是金(jin)屬電(dian)阻(zu)應(ying)變(bian)(bian)(bian)(bian)(bian)(bian)片(pian)(pian)和半導體應(ying)變(bian)(bian)(bian)(bian)(bian)(bian)片(pian)(pian)兩種(zhong)。金(jin)屬電(dian)阻(zu)應(ying)變(bian)(bian)(bian)(bian)(bian)(bian)片(pian)(pian)又(you)有(you)絲狀(zhuang)應(ying)變(bian)(bian)(bian)(bian)(bian)(bian)片(pian)(pian)和金(jin)屬箔狀(zhuang)應(ying)變(bian)(bian)(bian)(bian)(bian)(bian)片(pian)(pian)兩種(zhong)。通常是將應(ying)變(bian)(bian)(bian)(bian)(bian)(bian)片(pian)(pian)通過(guo)特殊的(de)(de)黏合(he)劑(ji)緊密(mi)地粘合(he)在產(chan)生(sheng)力(li)(li)學應(ying)變(bian)(bian)(bian)(bian)(bian)(bian)基體上，當基體受力(li)(li)發(fa)生(sheng)應(ying)力(li)(li)變(bian)(bian)(bian)(bian)(bian)(bian)化時，電(dian)阻(zu)應(ying)變(bian)(bian)(bian)(bian)(bian)(bian)片(pian)(pian)也(ye)一(yi)(yi)起產(chan)生(sheng)形變(bian)(bian)(bian)(bian)(bian)(bian)，使(shi)(shi)應(ying)變(bian)(bian)(bian)(bian)(bian)(bian)片(pian)(pian)的(de)(de)阻(zu)值發(fa)生(sheng)改變(bian)(bian)(bian)(bian)(bian)(bian)，從而使(shi)(shi)加在電(dian)阻(zu)上的(de)(de)電(dian)壓發(fa)生(sheng)變(bian)(bian)(bian)(bian)(bian)(bian)化。

主要(yao)性能

1、使用被測介質廣泛，可測油、水及與316不銹鋼(gang)和304不銹鋼(gang)兼(jian)容的糊狀物，具有一定(ding)的防腐能力(li)；

2、高(gao)(gao)準(zhun)確度、高(gao)(gao)穩(wen)定性、選用(yong)進口原裝(zhuang)傳感器，線性好，溫度穩(wen)定性高(gao)(gao)；

3、體(ti)積(ji)小(xiao)、重量輕、安裝、調試、使(shi)用(yong)方便；

4、不銹(xiu)鋼全封(feng)閉外殼，防水好；

5、壓力(li)傳(chuan)感器直(zhi)接感測(ce)被測(ce)液位壓力(li)，不受介質(zhi)起(qi)泡、沉積的影響。

主要(yao)優點(dian)

       1、壓力變送器具(ju)有工作可靠、性能(neng)穩(wen)定等特點；