TURCK圖爾克電容式傳感器工作原理概述

隔離測(ce)試電壓(ya) ≤ 0.5 kV

輸出性(xing)能 3線(xian), 常開觸點, PNP

短路保護 是 / 循環

Ie時的壓降(jiang) ≤ 1.8 V

斷路/反極(ji)性保(bao)護 是(shi) / 是(shi)

磁滯 2…20  %

溫度(du)漂移 型號 20 %

重復精度(du) ≤ 2 %滿量程(cheng)

工作溫度 -25…+70  °C

儲(chu)藏(zang)溫度 -25…+80 ℃  °C

把被測(ce)的(de)(de)(de)機械量，如位(wei)移(yi)、壓(ya)力(li)等轉(zhuan)換為(wei)(wei)(wei)電(dian)(dian)容(rong)量變(bian)(bian)(bian)化(hua)的(de)(de)(de)傳(chuan)(chuan)(chuan)感(gan)器(qi)。它的(de)(de)(de)敏(min)感(gan)部(bu)分就(jiu)是(shi)具有(you)可(ke)變(bian)(bian)(bian)參數(shu)的(de)(de)(de)電(dian)(dian)容(rong)器(qi)。其的(de)(de)(de)形式(shi)是(shi)由兩個平行電(dian)(dian)極(ji)(ji)組成、極(ji)(ji)間以空氣為(wei)(wei)(wei)介(jie)質(zhi)的(de)(de)(de)電(dian)(dian)容(rong)器(qi)(見(jian)圖)。若忽略(lve)邊(bian)緣效應，平板電(dian)(dian)容(rong)器(qi)的(de)(de)(de)電(dian)(dian)容(rong)為(wei)(wei)(wei)εS/d，式(shi)中(zhong)(zhong)ε為(wei)(wei)(wei)極(ji)(ji)間介(jie)質(zhi)的(de)(de)(de)介(jie)電(dian)(dian)常(chang)數(shu)，S為(wei)(wei)(wei)兩極(ji)(ji)板互相覆蓋的(de)(de)(de)面(mian)積(ji)，d為(wei)(wei)(wei)兩電(dian)(dian)極(ji)(ji)之間的(de)(de)(de)距(ju)離。d、s、ε 三(san)個參數(shu)中(zhong)(zhong)任一個的(de)(de)(de)變(bian)(bian)(bian)化(hua)都將引(yin)起電(dian)(dian)容(rong)量變(bian)(bian)(bian)化(hua)，并(bing)可(ke)用(yong)(yong)于(yu)測(ce)量。因此(ci)電(dian)(dian)容(rong)式(shi)傳(chuan)(chuan)(chuan)感(gan)器(qi)可(ke)分為(wei)(wei)(wei)極(ji)(ji)距(ju)變(bian)(bian)(bian)化(hua)型、面(mian)積(ji)變(bian)(bian)(bian)化(hua)型、介(jie)質(zhi)變(bian)(bian)(bian)化(hua)型三(san)類。極(ji)(ji)距(ju)變(bian)(bian)(bian)化(hua)型一般用(yong)(yong)來測(ce)量微小(xiao)的(de)(de)(de)線位(wei)移(yi)或由于(yu)力(li)、壓(ya)力(li)、振動等引(yin)起的(de)(de)(de)極(ji)(ji)距(ju)變(bian)(bian)(bian)化(hua)(見(jian)電(dian)(dian)容(rong)式(shi)壓(ya)力(li)傳(chuan)(chuan)(chuan)感(gan)器(qi))。面(mian)積(ji)變(bian)(bian)(bian)化(hua)型一般用(yong)(yong)于(yu)測(ce)量角(jiao)位(wei)移(yi)或較大的(de)(de)(de)線位(wei)移(yi)。介(jie)質(zhi)變(bian)(bian)(bian)化(hua)型常(chang)用(yong)(yong)于(yu)物(wu)位(wei)測(ce)量和各種介(jie)質(zhi)的(de)(de)(de)溫度、密(mi)度、濕度的(de)(de)(de)測(ce)定。

典(dian)型的(de)(de)(de)電(dian)(dian)(dian)容(rong)(rong)式(shi)傳(chuan)感(gan)器由上(shang)下(xia)電(dian)(dian)(dian)極、絕緣體和襯(chen)底構成。當(dang)薄膜(mo)受(shou)壓力(li)(li)作用(yong)時，薄膜(mo)會發生(sheng)一定的(de)(de)(de)變形，因此，上(shang)下(xia)電(dian)(dian)(dian)極之(zhi)間(jian)的(de)(de)(de)距離(li)(li)發生(sheng)一定的(de)(de)(de)變化，從而使電(dian)(dian)(dian)容(rong)(rong)發生(sheng)變化。但電(dian)(dian)(dian)容(rong)(rong)式(shi)壓力(li)(li)傳(chuan)感(gan)器的(de)(de)(de)電(dian)(dian)(dian)容(rong)(rong)與上(shang)下(xia)電(dian)(dian)(dian)極之(zhi)間(jian)的(de)(de)(de)距離(li)(li)的(de)(de)(de)關系(xi)(xi)是(shi)非線(xian)性(xing)關系(xi)(xi)，因此，要用(yong)具有補償功能的(de)(de)(de)測量(liang)電(dian)(dian)(dian)路對輸出電(dian)(dian)(dian)容(rong)(rong)進行非線(xian)性(xing)補償。

電容式傳感(gan)器(qi)用(yong)于非(fei)(fei)接觸地和無磨損地檢測金屬（導(dao)電）和非(fei)(fei)金屬（非(fei)(fei)導(dao)電）的檢測物體。

額定開關(guan)距離（非齊平） 3 mm

安全工作距離 ≤ (0.72 x Sn)

工作電壓 10…30  VDC

余波 ≤ 10 % Uss

直流(liu)額定工作電流(liu) ≤ 200 mA

空(kong)載電流 ≤ 15 mA

漏電流 ≤ 0.1 mA

開關(guan)頻(pin)率(lv) 0.1 kHz

感應面材料 ABS, 黃

可耐壓前端防護帽 ≤ 5 bar

最(zui)大扭(niu)矩(ju) 10 Nm

電氣連接 線纜

線纜材質 ? 4  mm, LifYY, PVC, 2  m

導(dao)體(ti)橫截(jie)面 3 x 0.25  mm2

TURCK圖爾克電容式傳感器工作原理概述