工控自動化技術文摘：傳感器與變送器的區別與聯係

傳(chuan)感(gan)器(qi)是(shi)能(neng)夠(gou)受(shou)規(gui)定(ding)的(de)被(bei)測(ce)量(liang)並(bing)按(an)照(zhao)一(yi)定(ding)的(de)規(gui)律(lv)轉(zhuan)換(huan)成(cheng)可(ke)用(yong)輸(shu)出(chu)信(xin)號(hao)的(de)器(qi)件(jian)或(huo)裝(zhuang)置(zhi)的(de)總(zong)稱(cheng)，通(tong)常(chang)由(you)敏(min)感(gan)元(yuan)件(jian)和(he)轉(zhuan)換(huan)元(yuan)件(jian)組(zu)成(cheng)。當(dang)傳(chuan)感(gan)器(qi)的(de)輸(shu)出(chu)為(wei)規(gui)定(ding)的(de)標(biao)準(zhun)信(xin)號(hao)時(shi)，則(ze)稱(cheng)為(wei)變(bian)送(song)器(qi)。

　　傳感器和變送器本是熱工儀表的概念。傳感器是把非電物理量如溫度、壓力、液位、物料、氣體特性等轉換成電信號或把物理量如壓力、液(ye)位(wei)等(deng)直(zhi)接(jie)送(song)到(dao)變(bian)送(song)器(qi)。變(bian)送(song)器(qi)則(ze)是(shi)把(ba)傳(chuan)感(gan)器(qi)采(cai)集(ji)到(dao)的(de)微(wei)弱(ruo)的(de)電(dian)信(xin)號(hao)放(fang)大(da)以(yi)便(bian)轉(zhuan)送(song)或(huo)啟(qi)動(dong)控(kong)製(zhi)元(yuan)件(jian)。或(huo)將(jiang)傳(chuan)感(gan)器(qi)輸(shu)入(ru)的(de)非(fei)電(dian)量(liang)轉(zhuan)換(huan)成(cheng)電(dian)信(xin)號(hao)同(tong)時(shi)放(fang)大(da)以(yi)便(bian)供(gong)遠(yuan)方(fang)測(ce)量(liang)和(he)控(kong)製(zhi)的(de)信(xin)號(hao)源(yuan)。根(gen)據(ju)需(xu)要(yao)還(hai)可(ke)將(jiang)模(mo)擬(ni)量(liang)變(bian)換(huan)為(wei)數(shu)字(zi)量(liang)。傳(chuan)感(gan)器(qi)和(he)變(bian)送(song)器(qi)一(yi)同(tong)構(gou)成(cheng)自(zi)動(dong)控(kong)製(zhi)的(de)監(jian)測(ce)信(xin)號(hao)源(yuan)。不(bu)同(tong)的(de)物(wu)理(li)量(liang)需(xu)要(yao)不(bu)同(tong)的(de)傳(chuan)感(gan)器(qi)和(he)相(xiang)應(ying)的(de)變(bian)送(song)器(qi)。還(hai)有(you)一(yi)種(zhong)變(bian)送(song)器(qi)不(bu)是(shi)將(jiang)物(wu)理(li)量(liang)變(bian)換(huan)成(cheng)電(dian)信(xin)號(hao)，如(ru)一(yi)種(zhong)鍋(guo)爐(lu)水(shui)位(wei)計(ji)的(de)“差壓變送器”，tashijiangyeweichuanganqilidexiabudeshuiheshangbuzhengqidelengningshuitongguoyibiaoguansongdaobiansongqidebowenguanliangce，yibowenguanliangcedechayadaidongjixiefangdazhuangzhiyongzhizhenzhishishuiweideyizhongyuanfangyibiao。dangranhaiyoubadianqimoniliangbianhuanchengshuziliangdeyekeyijiaobiansongqi。yishangzhishiconggainianshangshuomingchuanganqihebiansongqidequbie。