易福門IFM電感式傳感器，愛福門電感式傳感器

電感式傳感器具有以下特點： 　　（1）結構簡單，傳感器無活動電觸點，因此工作可靠壽命長。 　　（2）靈敏度和分辨力高，能測出0.01微米的位移變化。傳感器的輸出信號強，電壓靈敏度般每毫米的位移可達數百毫伏的輸出。 　　（3）線性度和重復性都比較好，在定位移范圍（幾十微米數毫米）內，傳感器非線性誤差可達0.05%~0.1%。同時，這種傳感器能實現信息的遠距離傳輸、記錄、顯示和控制，它在工業自動控制系統中廣泛被采用。但不足的是，它有頻率響應較低，不宜快速動態測控等缺點。 　　電感式傳感器種類很多，常見的有自感式，互感式和渦流式三種。
圖(tu)中介紹(shao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)自(zi)感(gan)(gan)式傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi)。由(you)鐵(tie)心和(he)線(xian)(xian)(xian)(xian)(xian)圈(quan)(quan)構(gou)成(cheng)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)將(jiang)直線(xian)(xian)(xian)(xian)(xian)或(huo)角位移(yi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)變(bian)(bian)(bian)化(hua)(hua)轉(zhuan)(zhuan)換(huan)為(wei)線(xian)(xian)(xian)(xian)(xian)圈(quan)(quan)電(dian)(dian)(dian)感(gan)(gan)量(liang)(liang)(liang)變(bian)(bian)(bian)化(hua)(hua)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi)，又稱電(dian)(dian)(dian)感(gan)(gan)式位移(yi)傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi)。這(zhe)種(zhong)(zhong)傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)線(xian)(xian)(xian)(xian)(xian)圈(quan)(quan)匝數和(he)材料(liao)導磁(ci)系數都是(shi)(shi)定的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)，其電(dian)(dian)(dian)感(gan)(gan)量(liang)(liang)(liang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)變(bian)(bian)(bian)化(hua)(hua)是(shi)(shi)由(you)于(yu)位移(yi)輸(shu)入(ru)量(liang)(liang)(liang)導致線(xian)(xian)(xian)(xian)(xian)圈(quan)(quan)磁(ci)路的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)幾(ji)何尺寸變(bian)(bian)(bian)化(hua)(hua)而引(yin)起的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)。當把線(xian)(xian)(xian)(xian)(xian)圈(quan)(quan)接(jie)入(ru)測量(liang)(liang)(liang)電(dian)(dian)(dian)路并接(jie)通(tong)激(ji)勵電(dian)(dian)(dian)源(yuan)時，就(jiu)可獲得正比于(yu)位移(yi)輸(shu)入(ru)量(liang)(liang)(liang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)壓(ya)(ya)或(huo)電(dian)(dian)(dian)流(liu)輸(shu)出。電(dian)(dian)(dian)感(gan)(gan)式傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)特點是(shi)(shi)：①無活動(dong)(dong)觸點、可靠度(du)(du)高(gao)、壽命長；②分辨率高(gao)；③靈敏(min)度(du)(du)高(gao)；④線(xian)(xian)(xian)(xian)(xian)性度(du)(du)高(gao)、重復性好；⑤測量(liang)(liang)(liang)范圍(wei)寬（測量(liang)(liang)(liang)范圍(wei)大(da)時分辨率低）；⑥無輸(shu)入(ru)時有零(ling)位輸(shu)出電(dian)(dian)(dian)壓(ya)(ya)，引(yin)起測量(liang)(liang)(liang)誤(wu)差(cha)(cha)；⑦對激(ji)勵電(dian)(dian)(dian)源(yuan)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)頻率和(he)幅值穩定性要求較高(gao)；⑧不適用(yong)于(yu)高(gao)頻動(dong)(dong)態(tai)測量(liang)(liang)(liang)。電(dian)(dian)(dian)感(gan)(gan)式傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi)主要用(yong)于(yu)位移(yi)測量(liang)(liang)(liang)和(he)可以(yi)(yi)轉(zhuan)(zhuan)換(huan)成(cheng)位移(yi)變(bian)(bian)(bian)化(hua)(hua)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)機械量(liang)(liang)(liang)（如力(li)、張力(li)、壓(ya)(ya)力(li)、壓(ya)(ya)差(cha)(cha)、加速度(du)(du)、振動(dong)(dong)、應(ying)變(bian)(bian)(bian)、流(liu)量(liang)(liang)(liang)、厚度(du)(du)、液位、比重、轉(zhuan)(zhuan)矩等）的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)測量(liang)(liang)(liang)。常用(yong)電(dian)(dian)(dian)感(gan)(gan)式傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi)有變(bian)(bian)(bian)間(jian)(jian)隙型(xing)(xing)、變(bian)(bian)(bian)面積型(xing)(xing)和(he)螺管(guan)插(cha)(cha)鐵(tie)型(xing)(xing)。在(zai)實際(ji)應(ying)用(yong)中，這(zhe)三(san)種(zhong)(zhong)傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi)多(duo)制成(cheng)差(cha)(cha)動(dong)(dong)式，以(yi)(yi)便提高(gao)線(xian)(xian)(xian)(xian)(xian)性度(du)(du)和(he)減(jian)小電(dian)(dian)(dian)磁(ci)吸(xi)力(li)所造成(cheng)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)附加誤(wu)差(cha)(cha)。 　　變(bian)(bian)(bian)間(jian)(jian)隙型(xing)(xing)電(dian)(dian)(dian)感(gan)(gan)傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi) 這(zhe)種(zhong)(zhong)傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)氣隙δ隨(sui)被測量(liang)(liang)(liang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)變(bian)(bian)(bian)化(hua)(hua)而改變(bian)(bian)(bian),從(cong)而改變(bian)(bian)(bian)磁(ci)阻(zu)（圖(tu)1）。它的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)靈敏(min)度(du)(du)和(he)非線(xian)(xian)(xian)(xian)(xian)性都隨(sui)氣隙的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)增(zeng)大(da)而減(jian)小，因此常常要考慮兩(liang)者兼(jian)顧。δ般取在(zai)0.1～0.5毫米(mi)之間(jian)(jian)。 　　變(bian)(bian)(bian)面積型(xing)(xing)電(dian)(dian)(dian)感(gan)(gan)傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi) 這(zhe)種(zhong)(zhong)傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)鐵(tie)芯和(he)銜(xian)鐵(tie)之間(jian)(jian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)相對覆蓋面積（即磁(ci)通(tong)截面）隨(sui)被測量(liang)(liang)(liang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)變(bian)(bian)(bian)化(hua)(hua)而改變(bian)(bian)(bian),從(cong)而改變(bian)(bian)(bian)磁(ci)阻(zu)（圖(tu)2）。它的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)靈敏(min)度(du)(du)為(wei)常數，線(xian)(xian)(xian)(xian)(xian)性度(du)(du)也很好。 　　螺管(guan)插(cha)(cha)鐵(tie)型(xing)(xing)電(dian)(dian)(dian)感(gan)(gan)傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi) 它由(you)螺管(guan)線(xian)(xian)(xian)(xian)(xian)圈(quan)(quan)和(he)與被測物體相連的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)柱型(xing)(xing)銜(xian)鐵(tie)構(gou)成(cheng)。其工作原理基(ji)于(yu)線(xian)(xian)(xian)(xian)(xian)圈(quan)(quan)磁(ci)力(li)線(xian)(xian)(xian)(xian)(xian)泄(xie)漏(lou)路徑上(shang)磁(ci)阻(zu)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)變(bian)(bian)(bian)化(hua)(hua)。銜(xian)鐵(tie)隨(sui)被測物體移(yi)動(dong)(dong)時改變(bian)(bian)(bian)了(le)線(xian)(xian)(xian)(xian)(xian)圈(quan)(quan)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)感(gan)(gan)量(liang)(liang)(liang)。這(zhe)種(zhong)(zhong)傳感(gan)(gan)器(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)量(liang)(liang)(liang)程大(da)，靈敏(min)度(du)(du)低，結構(gou)簡單，便于(yu)制作。

易福門IFM電感式傳感器，愛福門電感式傳感器