TURCK圖爾克電容式傳感器工作原理概述

隔離測試電壓 ≤ 0.5 kV

輸出性能 3線(xian), 常開觸點, PNP

短(duan)路保護 是 / 循環

Ie時(shi)的壓降 ≤ 1.8 V

斷路/反極性(xing)保護 是 / 是

磁滯 2…20  %

溫度漂(piao)移 型號 20 %

重復(fu)精度 ≤ 2 %滿量(liang)程

工(gong)作溫(wen)度 -25…+70  °C

儲藏溫(wen)度 -25…+80 ℃  °C

把(ba)被測的(de)(de)(de)(de)(de)機械量(liang)，如位(wei)(wei)移、壓力等(deng)轉(zhuan)換(huan)為(wei)(wei)(wei)電(dian)容量(liang)變(bian)(bian)(bian)(bian)化(hua)(hua)(hua)(hua)(hua)(hua)的(de)(de)(de)(de)(de)傳(chuan)感(gan)器(qi)。它的(de)(de)(de)(de)(de)敏(min)感(gan)部分就是具有可變(bian)(bian)(bian)(bian)參數(shu)的(de)(de)(de)(de)(de)電(dian)容器(qi)。其的(de)(de)(de)(de)(de)形式是由兩個平行電(dian)極(ji)組成、極(ji)間(jian)以空(kong)氣為(wei)(wei)(wei)介(jie)(jie)質(zhi)(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)電(dian)容器(qi)(見圖)。若忽略邊緣效應(ying)，平板電(dian)容器(qi)的(de)(de)(de)(de)(de)電(dian)容為(wei)(wei)(wei)εS/d，式中(zhong)ε為(wei)(wei)(wei)極(ji)間(jian)介(jie)(jie)質(zhi)(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)介(jie)(jie)電(dian)常數(shu)，S為(wei)(wei)(wei)兩極(ji)板互相覆蓋的(de)(de)(de)(de)(de)面(mian)(mian)(mian)積(ji)，d為(wei)(wei)(wei)兩電(dian)極(ji)之間(jian)的(de)(de)(de)(de)(de)距(ju)離。d、s、ε 三(san)個參數(shu)中(zhong)任一個的(de)(de)(de)(de)(de)變(bian)(bian)(bian)(bian)化(hua)(hua)(hua)(hua)(hua)(hua)都(dou)將引起電(dian)容量(liang)變(bian)(bian)(bian)(bian)化(hua)(hua)(hua)(hua)(hua)(hua)，并可用于測量(liang)。因此(ci)電(dian)容式傳(chuan)感(gan)器(qi)可分為(wei)(wei)(wei)極(ji)距(ju)變(bian)(bian)(bian)(bian)化(hua)(hua)(hua)(hua)(hua)(hua)型、面(mian)(mian)(mian)積(ji)變(bian)(bian)(bian)(bian)化(hua)(hua)(hua)(hua)(hua)(hua)型、介(jie)(jie)質(zhi)(zhi)(zhi)(zhi)變(bian)(bian)(bian)(bian)化(hua)(hua)(hua)(hua)(hua)(hua)型三(san)類(lei)。極(ji)距(ju)變(bian)(bian)(bian)(bian)化(hua)(hua)(hua)(hua)(hua)(hua)型一般用來測量(liang)微小的(de)(de)(de)(de)(de)線位(wei)(wei)移或由于力、壓力、振動(dong)等(deng)引起的(de)(de)(de)(de)(de)極(ji)距(ju)變(bian)(bian)(bian)(bian)化(hua)(hua)(hua)(hua)(hua)(hua)(見電(dian)容式壓力傳(chuan)感(gan)器(qi))。面(mian)(mian)(mian)積(ji)變(bian)(bian)(bian)(bian)化(hua)(hua)(hua)(hua)(hua)(hua)型一般用于測量(liang)角位(wei)(wei)移或較大(da)的(de)(de)(de)(de)(de)線位(wei)(wei)移。介(jie)(jie)質(zhi)(zhi)(zhi)(zhi)變(bian)(bian)(bian)(bian)化(hua)(hua)(hua)(hua)(hua)(hua)型常用于物位(wei)(wei)測量(liang)和各種介(jie)(jie)質(zhi)(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)溫度、密度、濕(shi)度的(de)(de)(de)(de)(de)測定。

典(dian)型的(de)(de)電(dian)(dian)(dian)容(rong)(rong)式(shi)(shi)傳(chuan)感(gan)器(qi)由(you)上(shang)下電(dian)(dian)(dian)極(ji)、絕(jue)緣體和襯(chen)底構成(cheng)。當薄膜受壓力作(zuo)用(yong)時，薄膜會發生(sheng)一定的(de)(de)變形，因此，上(shang)下電(dian)(dian)(dian)極(ji)之間的(de)(de)距(ju)(ju)離發生(sheng)一定的(de)(de)變化(hua)，從而(er)使電(dian)(dian)(dian)容(rong)(rong)發生(sheng)變化(hua)。但電(dian)(dian)(dian)容(rong)(rong)式(shi)(shi)壓力傳(chuan)感(gan)器(qi)的(de)(de)電(dian)(dian)(dian)容(rong)(rong)與上(shang)下電(dian)(dian)(dian)極(ji)之間的(de)(de)距(ju)(ju)離的(de)(de)關(guan)系是非線性關(guan)系，因此，要用(yong)具有補償(chang)功能的(de)(de)測量電(dian)(dian)(dian)路對輸出電(dian)(dian)(dian)容(rong)(rong)進行(xing)非線性補償(chang)。

電容式傳感器(qi)用于非接觸地(di)和無磨損(sun)地(di)檢測(ce)金屬（導電）和非金屬（非導電）的檢測(ce)物體。

額定開(kai)關距離（非齊(qi)平） 3 mm

安全工作(zuo)距離 ≤ (0.72 x Sn)

工作電壓 10…30  VDC

余波 ≤ 10 % Uss

直流額(e)定工作電流 ≤ 200 mA

空(kong)載電流(liu) ≤ 15 mA

漏電流 ≤ 0.1 mA

開關頻率 0.1 kHz

感(gan)應(ying)面材(cai)料 ABS, 黃

可耐壓前端(duan)防護帽 ≤ 5 bar

最大扭矩 10 Nm

電氣連接 線纜

線纜材質 ? 4  mm, LifYY, PVC, 2  m

導(dao)體橫截面 3 x 0.25  mm2

TURCK圖爾克電容式傳感器工作原理概述