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工(gong)作(zuo)原理(li)
電(dian)(dian)(dian)位(wei)(wei)(wei)器(qi)式位(wei)(wei)(wei)移(yi)(yi)(yi)傳(chuan)感(gan)(gan)器(qi)，它(ta)通過電(dian)(dian)(dian)位(wei)(wei)(wei)器(qi)元(yuan)件(jian)(jian)將機械(xie)位(wei)(wei)(wei)移(yi)(yi)(yi)轉換成與之(zhi)成線性(xing)或任意(yi)函數關(guan)系(xi)的(de)(de)(de)(de)電(dian)(dian)(dian)阻(zu)(zu)或電(dian)(dian)(dian)壓輸(shu)出(chu)。普通直線電(dian)(dian)(dian)位(wei)(wei)(wei)器(qi)和(he)圓形電(dian)(dian)(dian)位(wei)(wei)(wei)器(qi)都可(ke)分(fen)別用(yong)作直線位(wei)(wei)(wei)移(yi)(yi)(yi)和(he)角位(wei)(wei)(wei)移(yi)(yi)(yi)傳(chuan)感(gan)(gan)器(qi)。但(dan)是(shi)，為(wei)實(shi)現測量(liang)位(wei)(wei)(wei)移(yi)(yi)(yi)目的(de)(de)(de)(de)而設計的(de)(de)(de)(de)電(dian)(dian)(dian)位(wei)(wei)(wei)器(qi)，要求(qiu)在位(wei)(wei)(wei)移(yi)(yi)(yi)變化(hua)(hua)(hua)和(he)電(dian)(dian)(dian)阻(zu)(zu)變化(hua)(hua)(hua)之(zhi)間有一(yi)個(ge)確定關(guan)系(xi)。電(dian)(dian)(dian)位(wei)(wei)(wei)器(qi)式位(wei)(wei)(wei)移(yi)(yi)(yi)傳(chuan)感(gan)(gan)器(qi)的(de)(de)(de)(de)可(ke)動(dong)電(dian)(dian)(dian)刷與被測物(wu)體(ti)相(xiang)連。物(wu)體(ti)的(de)(de)(de)(de)位(wei)(wei)(wei)移(yi)(yi)(yi)引(yin)起電(dian)(dian)(dian)位(wei)(wei)(wei)器(qi)移(yi)(yi)(yi)動(dong)端的(de)(de)(de)(de)電(dian)(dian)(dian)阻(zu)(zu)變化(hua)(hua)(hua)。阻(zu)(zu)值(zhi)的(de)(de)(de)(de)變化(hua)(hua)(hua)量(liang)反映了(le)位(wei)(wei)(wei)移(yi)(yi)(yi)的(de)(de)(de)(de)量(liang)值(zhi)，阻(zu)(zu)值(zhi)的(de)(de)(de)(de)增加(jia)還是(shi)減小則表明了(le)位(wei)(wei)(wei)移(yi)(yi)(yi)的(de)(de)(de)(de)方向。通常在電(dian)(dian)(dian)位(wei)(wei)(wei)器(qi)上通以(yi)電(dian)(dian)(dian)源電(dian)(dian)(dian)壓，以(yi)把電(dian)(dian)(dian)阻(zu)(zu)變化(hua)(hua)(hua)轉換為(wei)電(dian)(dian)(dian)壓輸(shu)出(chu)。線繞式電(dian)(dian)(dian)位(wei)(wei)(wei)器(qi)由于其電(dian)(dian)(dian)刷移(yi)(yi)(yi)動(dong)時電(dian)(dian)(dian)阻(zu)(zu)以(yi)匝電(dian)(dian)(dian)阻(zu)(zu)為(wei)階(jie)(jie)梯而變化(hua)(hua)(hua)，其輸(shu)出(chu)特性(xing)亦呈階(jie)(jie)梯形。如果(guo)這種位(wei)(wei)(wei)移(yi)(yi)(yi)傳(chuan)感(gan)(gan)器(qi)在伺(si)服(fu)系(xi)統(tong)中用(yong)作位(wei)(wei)(wei)移(yi)(yi)(yi)反饋元(yuan)件(jian)(jian)，則過大(da)的(de)(de)(de)(de)階(jie)(jie)躍電(dian)(dian)(dian)壓會引(yin)起系(xi)統(tong)振蕩。因此(ci)在電(dian)(dian)(dian)位(wei)(wei)(wei)器(qi)的(de)(de)(de)(de)制作中應盡量(liang)減小每匝的(de)(de)(de)(de)電(dian)(dian)(dian)阻(zu)(zu)值(zhi)。電(dian)(dian)(dian)位(wei)(wei)(wei)器(qi)式傳(chuan)感(gan)(gan)器(qi)的(de)(de)(de)(de)另一(yi)個(ge)主要缺點(dian)是(shi)易磨損(sun)。它(ta)的(de)(de)(de)(de)優點(dian)是(shi)：結構簡單(dan)，輸(shu)出(chu)信(xin)號大(da)，使(shi)用(yong)方便(bian)，價格低廉。

磁(ci)致(zhi)伸縮(suo)位(wei)移傳(chuan)(chuan)感器，是(shi)利用磁(ci)致(zhi)伸縮(suo)原(yuan)理(li)、通過(guo)兩個(ge)(ge)不同磁(ci)場(chang)相交產(chan)生(sheng)(sheng)一(yi)個(ge)(ge)應變(bian)(bian)脈(mo)沖(chong)信(xin)號(hao)(hao)來準確(que)地測量(liang)位(wei)置的(de)。測量(liang)元件(jian)是(shi)一(yi)根(gen)波(bo)(bo)(bo)導(dao)管(guan)，波(bo)(bo)(bo)導(dao)管(guan)內的(de)敏感元件(jian)由特殊(shu)的(de)磁(ci)致(zhi)伸縮(suo)材料(liao)制成的(de)。測量(liang)過(guo)程是(shi)由傳(chuan)(chuan)感器的(de)電子室內產(chan)生(sheng)(sheng)電流脈(mo)沖(chong)，該電流脈(mo)沖(chong)在(zai)(zai)波(bo)(bo)(bo)導(dao)管(guan)內傳(chuan)(chuan)輸(shu)(shu)(shu)，從而在(zai)(zai)波(bo)(bo)(bo)導(dao)管(guan)外(wai)產(chan)生(sheng)(sheng)一(yi)個(ge)(ge)圓周磁(ci)場(chang)，當該磁(ci)場(chang)和套在(zai)(zai)波(bo)(bo)(bo)導(dao)管(guan)上作(zuo)為位(wei)置變(bian)(bian)化的(de)活動(dong)磁(ci)環產(chan)生(sheng)(sheng)的(de)磁(ci)場(chang)相交時(shi)，由于(yu)磁(ci)致(zhi)伸縮(suo)的(de)作(zuo)用，波(bo)(bo)(bo)導(dao)管(guan)內會產(chan)生(sheng)(sheng)一(yi)個(ge)(ge)應變(bian)(bian)機(ji)械波(bo)(bo)(bo)脈(mo)沖(chong)信(xin)號(hao)(hao)，這個(ge)(ge)應變(bian)(bian)機(ji)械波(bo)(bo)(bo)脈(mo)沖(chong)信(xin)號(hao)(hao)以固定的(de)聲音速(su)度(du)傳(chuan)(chuan)輸(shu)(shu)(shu)，并(bing)很快被電子室所檢測到。由于(yu)這個(ge)(ge)應變(bian)(bian)機(ji)械波(bo)(bo)(bo)脈(mo)沖(chong)信(xin)號(hao)(hao)在(zai)(zai)波(bo)(bo)(bo)導(dao)管(guan)內的(de)傳(chuan)(chuan)輸(shu)(shu)(shu)時(shi)間和活動(dong)磁(ci)環與電子室之間的(de)距(ju)離成正(zheng)比，通過(guo)測量(liang)時(shi)間，就可(ke)以高度(du)精確(que)地確(que)定這個(ge)(ge)距(ju)離。由于(yu)輸(shu)(shu)(shu)出信(xin)號(hao)(hao)是(shi)一(yi)個(ge)(ge)真正(zheng)的(de)值,而不是(shi)比例的(de)或放(fang)大處理(li)的(de)信(xin)號(hao)(hao),所以不存在(zai)(zai)信(xin)號(hao)(hao)漂移或變(bian)(bian)值的(de)情況,更無需(xu)定期重(zhong)標。

小流量塑料轉子KOBOLD流量計KFR-2110測量范圍:
10 - 100 cm3/min ... 1 - 10 l/min 水(shui)
0.04 - 0.5 l/min ... 100 - 700 l/min 空(kong)氣
連接: ? ... 1" NPT 內(nei)螺(luo)紋
材質: 有機玻璃+F63
耐壓: 6.5 bar
介質(zhi)高溫度(du): 65°C
精度: ±2 - 5 % 滿(man)量程