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壓(ya)力(li)(li)變(bian)送器(qi)(qi)是工業上(shang)(shang)非常(chang)常(chang)用的(de)(de)(de)(de)(de)(de)傳感(gan)器(qi)(qi)之一，在(zai)(zai)油(you)(you)庫(ku)(ku)自動化(hua)中的(de)(de)(de)(de)(de)(de)應用尤(you)為廣泛，液(ye)位(wei)儀(yi)深化(hua)應用中，對壓(ya)力(li)(li)變(bian)送器(qi)(qi)的(de)(de)(de)(de)(de)(de)安(an)裝(zhuang)(zhuang)也有著嚴格(ge)的(de)(de)(de)(de)(de)(de)要求(qiu)。壓(ya)力(li)(li)傳感(gan)器(qi)(qi)的(de)(de)(de)(de)(de)(de)安(an)裝(zhuang)(zhuang)標(biao)準(zhun)(zhun)上(shang)(shang)由明(ming)確的(de)(de)(de)(de)(de)(de)標(biao)準(zhun)(zhun)，石(shi)油(you)(you)企業的(de)(de)(de)(de)(de)(de)油(you)(you)庫(ku)(ku)自動化(hua)改(gai)造要滿足可(ke)靠性和穩(wen)定性的(de)(de)(de)(de)(de)(de)標(biao)準(zhun)(zhun)，應安(an)裝(zhuang)(zhuang)在(zai)(zai)水位(wei)以上(shang)(shang)，接近(jin)罐底的(de)(de)(de)(de)(de)(de)位(wei)置，這樣的(de)(de)(de)(de)(de)(de)好處不言而(er)喻，能夠(gou)有效避免(mian)罐壁(bi)變(bian)形引起的(de)(de)(de)(de)(de)(de)測量誤(wu)差。目前油(you)(you)庫(ku)(ku)自動化(hua)改(gai)造過程中存(cun)在(zai)(zai)的(de)(de)(de)(de)(de)(de)弊端主(zhu)要是壓(ya)力(li)(li)變(bian)送器(qi)(qi)并未(wei)安(an)裝(zhuang)(zhuang)在(zai)(zai)量油(you)(you)口的(de)(de)(de)(de)(de)(de)附近(jin)，或(huo)者甚至安(an)裝(zhuang)(zhuang)在(zai)(zai)靠近(jin)油(you)(you)罐南北極的(de)(de)(de)(de)(de)(de)位(wei)置。這會導致液(ye)位(wei)儀(yi)與油(you)(you)罐沒(mei)有一個(ge)穩(wen)定的(de)(de)(de)(de)(de)(de)基準(zhun)(zhun)，液(ye)位(wei)儀(yi)的(de)(de)(de)(de)(de)(de)壓(ya)力(li)(li)變(bian)送器(qi)(qi)的(de)(de)(de)(de)(de)(de)安(an)裝(zhuang)(zhuang)基準(zhun)(zhun)...

穆勒斷(duan)路(lu)(lu)(lu)器(qi)(qi)(qi)是(shi)指能夠關(guan)合、承載和開(kai)斷(duan)正常或異常回路(lu)(lu)(lu)條件下的(de)電流(liu)的(de)開(kai)關(guan)裝(zhuang)(zhuang)置。斷(duan)路(lu)(lu)(lu)器(qi)(qi)(qi)可用來分(fen)配(pei)電能，不頻(pin)繁地啟動(dong)異步電動(dong)機，對電源線(xian)路(lu)(lu)(lu)及電動(dong)機等實行保護，斷(duan)路(lu)(lu)(lu)器(qi)(qi)(qi)按其(qi)使用范圍分(fen)為高壓(ya)(ya)斷(duan)路(lu)(lu)(lu)器(qi)(qi)(qi)與(yu)低壓(ya)(ya)斷(duan)路(lu)(lu)(lu)器(qi)(qi)(qi)，高低壓(ya)(ya)界線(xian)劃分(fen)比較模(mo)糊，一(yi)般將(jiang)3kV以上的(de)稱為高壓(ya)(ya)電器(qi)(qi)(qi)。穆勒斷(duan)路(lu)(lu)(lu)器(qi)(qi)(qi)的(de)接(jie)(jie)線(xian)方式(shi)有(you)板(ban)前(qian)、板(ban)后、插入式(shi)、抽屜式(shi)，板(ban)前(qian)接(jie)(jie)線(xian)是(shi)常見(jian)的(de)接(jie)(jie)線(xian)方式(shi)。1、板(ban)后接(jie)(jie)線(xian)方式(shi)：板(ban)后接(jie)(jie)線(xian)大特點是(shi)可以在(zai)更換或維(wei)修斷(duan)路(lu)(lu)(lu)器(qi)(qi)(qi)，不必(bi)重(zhong)新接(jie)(jie)線(xian)，只須將(jiang)前(qian)級電源斷(duan)開(kai)。由于該結構特殊，產品(pin)出廠時已(yi)按設計(ji)要求(qiu)配(pei)置了安(an)裝(zhuang)(zhuang)板(ban)和安(an)裝(zhuang)(zhuang)螺釘及...

編碼(ma)器(qi)（encoder）是(shi)(shi)將信(xin)號(hao)（如比特(te)流）或數(shu)據(ju)進行編制、轉換為(wei)(wei)可用以通訊、傳(chuan)輸和存儲的信(xin)號(hao)形(xing)式的設備。編碼(ma)器(qi)把(ba)角(jiao)位(wei)移或直線位(wei)移轉換成(cheng)(cheng)電(dian)信(xin)號(hao)，前者稱(cheng)(cheng)為(wei)(wei)碼(ma)盤，后者稱(cheng)(cheng)為(wei)(wei)碼(ma)尺。編碼(ma)器(qi)主要是(shi)(shi)由碼(ma)盤(圓(yuan)(yuan)光(guang)(guang)(guang)柵(zha)(zha)、指示(shi)光(guang)(guang)(guang)柵(zha)(zha))、機(ji)體、發光(guang)(guang)(guang)器(qi)件、感光(guang)(guang)(guang)器(qi)件等部件組成(cheng)(cheng)。（1）圓(yuan)(yuan)光(guang)(guang)(guang)柵(zha)(zha)是(shi)(shi)由涂膜(mo)在(zai)透明材料或刻(ke)畫(hua)在(zai)金(jin)屬材料上(shang)的成(cheng)(cheng)放射狀的明暗相間的條紋(wen)組成(cheng)(cheng)的。一(yi)個相鄰條紋(wen)間距稱(cheng)(cheng)為(wei)(wei)一(yi)個柵(zha)(zha)節,光(guang)(guang)(guang)柵(zha)(zha)整(zheng)周柵(zha)(zha)節數(shu)就是(shi)(shi)編碼(ma)器(qi)的脈沖數(shu)(分辨率)。（2）指示(shi)光(guang)(guang)(guang)柵(zha)(zha)是(shi)(shi)一(yi)片(pian)固定不動的,但窗口條紋(wen)刻(ke)線同圓(yuan)(yuan)光(guang)(guang)(guang)柵(zha)(zha)條紋(wen)刻(ke)線*相同的光(guang)(guang)(guang)柵(zha)(zha)片(pian)...

電(dian)(dian)(dian)(dian)位(wei)(wei)器(qi)(qi)(qi)是具有(you)三個引出(chu)(chu)端、阻(zu)(zu)(zu)值(zhi)可按某(mou)種(zhong)變化規律調節的(de)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)元(yuan)件(jian)。電(dian)(dian)(dian)(dian)位(wei)(wei)器(qi)(qi)(qi)通常由電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)體(ti)和可移(yi)動(dong)(dong)的(de)電(dian)(dian)(dian)(dian)刷組成(cheng)。當電(dian)(dian)(dian)(dian)刷沿電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)體(ti)移(yi)動(dong)(dong)時，在輸出(chu)(chu)端即獲得(de)與位(wei)(wei)移(yi)量成(cheng)一定關(guan)系(xi)的(de)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)值(zhi)或電(dian)(dian)(dian)(dian)壓(ya)(ya)。電(dian)(dian)(dian)(dian)位(wei)(wei)器(qi)(qi)(qi)既可作(zuo)三端元(yuan)件(jian)使用(yong)也可作(zuo)二(er)端元(yuan)件(jian)使用(yong)。后者(zhe)可視作(zuo)一可變電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)器(qi)(qi)(qi)，由于它在電(dian)(dian)(dian)(dian)路中的(de)作(zuo)用(yong)是獲得(de)與輸入電(dian)(dian)(dian)(dian)壓(ya)(ya)（外加電(dian)(dian)(dian)(dian)壓(ya)(ya)）成(cheng)一定關(guan)系(xi)的(de)輸出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)，因此稱之為電(dian)(dian)(dian)(dian)位(wei)(wei)器(qi)(qi)(qi)。對(dui)電(dian)(dian)(dian)(dian)位(wei)(wei)器(qi)(qi)(qi)的(de)主要要求(qiu)是：①阻(zu)(zu)(zu)值(zhi)符合要求(qiu)。②中心滑動(dong)(dong)端與電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)體(ti)之間接觸(chu)良好，轉動(dong)(dong)平滑。對(dui)帶(dai)開(kai)關(guan)的(de)電(dian)(dian)(dian)(dian)位(wei)(wei)器(qi)(qi)(qi)，開(kai)關(guan)部分(fen)應(ying)動(dong)(dong)作(zuo)準確可靠(kao)、靈活。因此在使用(yong)前必須檢查電(dian)(dian)(dian)(dian)位(wei)(wei)器(qi)(qi)(qi)...

伺(si)服(fu)電(dian)(dian)機(ji)(ji)一(yi)種服(fu)從控(kong)(kong)制(zhi)(zhi)信(xin)(xin)號指揮的(de)(de)電(dian)(dian)機(ji)(ji)：在控(kong)(kong)制(zhi)(zhi)信(xin)(xin)號發(fa)(fa)(fa)出(chu)之前(qian)，轉(zhuan)(zhuan)(zhuan)(zhuan)子靜止不(bu)動；當控(kong)(kong)制(zhi)(zhi)信(xin)(xin)號發(fa)(fa)(fa)出(chu)時，轉(zhuan)(zhuan)(zhuan)(zhuan)子立即轉(zhuan)(zhuan)(zhuan)(zhuan)動；當控(kong)(kong)制(zhi)(zhi)信(xin)(xin)號消失(shi)時，轉(zhuan)(zhuan)(zhuan)(zhuan)子能即時停(ting)轉(zhuan)(zhuan)(zhuan)(zhuan)。伺(si)服(fu)電(dian)(dian)機(ji)(ji)是(shi)自動控(kong)(kong)制(zhi)(zhi)裝置中(zhong)被(bei)用作執(zhi)行元件，將(jiang)電(dian)(dian)信(xin)(xin)號轉(zhuan)(zhuan)(zhuan)(zhuan)換成轉(zhuan)(zhuan)(zhuan)(zhuan)軸的(de)(de)角位移或角速度。因為，伺(si)服(fu)電(dian)(dian)機(ji)(ji)本身具(ju)備發(fa)(fa)(fa)出(chu)脈沖(chong)的(de)(de)功能，所以伺(si)服(fu)電(dian)(dian)機(ji)(ji)每旋轉(zhuan)(zhuan)(zhuan)(zhuan)一(yi)個(ge)角度，都會發(fa)(fa)(fa)出(chu)對應數(shu)量的(de)(de)脈沖(chong)，這(zhe)樣，和伺(si)服(fu)電(dian)(dian)機(ji)(ji)接受的(de)(de)脈沖(chong)形成了(le)呼應，或者(zhe)叫(jiao)閉環(huan)，如(ru)此(ci)一(yi)來，系統就(jiu)會知道發(fa)(fa)(fa)了(le)多(duo)少(shao)(shao)脈沖(chong)給伺(si)服(fu)電(dian)(dian)機(ji)(ji)，同時又收了(le)多(duo)少(shao)(shao)脈沖(chong)回來，這(zhe)樣，就(jiu)能夠很精確的(de)(de)控(kong)(kong)制(zhi)(zhi)電(dian)(dian)機(ji)(ji)的(de)(de)轉(zhuan)(zhuan)(zhuan)(zhuan)動，從而實現精確的(de)(de)定位，可...

接(jie)(jie)(jie)近(jin)(jin)(jin)開(kai)(kai)關(guan)(guan)是一種無(wu)(wu)需(xu)與運動(dong)部(bu)件進(jin)行(xing)機械直(zhi)接(jie)(jie)(jie)接(jie)(jie)(jie)觸(chu)而可(ke)(ke)以操作(zuo)的(de)(de)(de)(de)位置(zhi)開(kai)(kai)關(guan)(guan)，當物體接(jie)(jie)(jie)近(jin)(jin)(jin)開(kai)(kai)關(guan)(guan)的(de)(de)(de)(de)感(gan)應(ying)面(mian)到動(dong)作(zuo)距離時，不(bu)需(xu)要機械接(jie)(jie)(jie)觸(chu)及施加任何壓力(li)(li)即可(ke)(ke)使開(kai)(kai)關(guan)(guan)動(dong)作(zuo)，從(cong)而驅(qu)動(dong)直(zhi)流(liu)電(dian)(dian)器或給計算機（plc）裝置(zhi)提(ti)供控(kong)制指(zhi)令。接(jie)(jie)(jie)近(jin)(jin)(jin)開(kai)(kai)關(guan)(guan)是種開(kai)(kai)關(guan)(guan)型傳感(gan)器（即無(wu)(wu)觸(chu)點(dian)開(kai)(kai)關(guan)(guan)），它既(ji)有(you)行(xing)程(cheng)開(kai)(kai)關(guan)(guan)、微(wei)動(dong)開(kai)(kai)關(guan)(guan)的(de)(de)(de)(de)特性，同時具有(you)傳感(gan)性能，且動(dong)作(zuo)可(ke)(ke)靠，性能穩定，頻率響應(ying)快，應(ying)用壽(shou)命長，抗干擾能力(li)(li)強等、并具有(you)防水、防震、耐腐蝕等特點(dian)。產品有(you)電(dian)(dian)感(gan)式(shi)、電(dian)(dian)容式(shi)、霍爾式(shi)、交、直(zhi)流(liu)型。接(jie)(jie)(jie)近(jin)(jin)(jin)開(kai)(kai)關(guan)(guan)又稱無(wu)(wu)觸(chu)點(dian)接(jie)(jie)(jie)近(jin)(jin)(jin)開(kai)(kai)關(guan)(guan)，是理想的(de)(de)(de)(de)電(dian)(dian)子開(kai)(kai)關(guan)(guan)量傳感(gan)器...

壓(ya)(ya)力變(bian)送器(qi)是一種將壓(ya)(ya)力轉換成氣動(dong)信號(hao)(hao)或電動(dong)信號(hao)(hao)進(jin)行(xing)控制和遠傳的(de)設備(bei)。它能將測壓(ya)(ya)元件傳感器(qi)感受到(dao)的(de)氣體、液體等物理(li)壓(ya)(ya)力參數轉變(bian)成標準的(de)電信號(hao)(hao)（如4~20mADC等），以(yi)供給(gei)指(zhi)示報警儀(yi)(yi)、記錄儀(yi)(yi)、調(diao)(diao)節器(qi)等二次儀(yi)(yi)表進(jin)行(xing)測量(liang)、指(zhi)示和過程(cheng)調(diao)(diao)節。壓(ya)(ya)力變(bian)送器(qi)數值不停的(de)波動(dong)，其原因可能是管道里有未排凈(jing)的(de)介質(zhi)1.單閥組排氣:將隔(ge)(ge)離(li)(li)閥關閉(切(qie)除狀況(kuang))。使得排污口(kou)(kou)螺(luo)(luo)帽在擰松(song)狀況(kuang),緩慢(man)(man)翻(fan)開隔(ge)(ge)離(li)(li)閥(小(xiao)開度),介質(zhi)從排污口(kou)(kou)流出,慢(man)(man)慢(man)(man)加大(da)開度,一分(fen)鐘(zhong)后,觀察從排污口(kou)(kou)處的(de)水(shui)流,如果穩(wen)定則擰緊螺(luo)(luo)帽翻(fan)開隔(ge)(ge)離(li)(li)閥(投...

壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)(li)(li)變送(song)(song)器(qi)是由測量(liang)膜片(pian)與兩側絕緣片(pian)上的(de)(de)電(dian)(dian)(dian)極各(ge)組成(cheng)(cheng)一(yi)個電(dian)(dian)(dian)容器(qi)。當兩側壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)(li)(li)不一(yi)致(zhi)時，致(zhi)使測量(liang)膜片(pian)產生位(wei)移，其(qi)位(wei)移量(liang)和壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)(li)(li)差成(cheng)(cheng)正比，故兩側電(dian)(dian)(dian)容量(liang)就不等，通過振(zhen)蕩和解(jie)調環節。壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)(li)(li)變送(song)(song)器(qi)的(de)(de)主要作用把壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)(li)(li)信(xin)號(hao)傳到(dao)電(dian)(dian)(dian)子設(she)備，進而在計算機顯示(shi)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)(li)(li)其(qi)原理大致(zhi)是：將水壓(ya)(ya)(ya)(ya)這種壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)(li)(li)的(de)(de)力(li)(li)(li)(li)(li)(li)學信(xin)號(hao)轉(zhuan)變成(cheng)(cheng)電(dian)(dian)(dian)流(liu)（4-20mA）這樣的(de)(de)電(dian)(dian)(dian)子信(xin)號(hao)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)(li)(li)和電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)或(huo)(huo)電(dian)(dian)(dian)流(liu)大小(xiao)成(cheng)(cheng)線性關(guan)系(xi)，一(yi)般是正比關(guan)系(xi)。所(suo)以，變送(song)(song)器(qi)輸出的(de)(de)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)或(huo)(huo)電(dian)(dian)(dian)流(liu)隨(sui)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)(li)(li)增大而增大由此得(de)出一(yi)個壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)(li)(li)和電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)或(huo)(huo)電(dian)(dian)(dian)流(liu)的(de)(de)關(guan)系(xi)式壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)(li)(li)變送(song)(song)器(qi)的(de)(de)被測介質的(de)(de)兩種壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)(li)(li)通入高、低兩壓(ya)(ya)(ya)(ya)...