彈性(xing)體(彈性(xing)元件,敏感梁)在(zai)外力(li)作用(yong)下產(chan)生(sheng)彈性(xing)變(bian)(bian)形,使粘(zhan)貼(tie)在(zai)他表(biao)面的(de)電(dian)(dian)阻應變(bian)(bian)片(轉(zhuan)換元件)也隨同產(chan)生(sheng)變(bian)(bian)形,電(dian)(dian)阻應變(bian)(bian)片變(bian)(bian)形后,它的(de)阻值將(jiang)發生(sheng)變(bian)(bian)化(hua)(增大或減小),再(zai)經(jing)過惠斯頓電(dian)(dian)橋將(jiang)這一電(dian)(dian)阻變(bian)(bian)化(hua)轉(zhuan)換為電(dian)(dian)壓信號,從而完成了將(jiang)外力(li)變(bian)(bian)換為電(dian)(dian)信號的(de)過程。
傳統的(de)模擬(ni)式電(dian)阻應變(bian)(bian)式傳感(gan)器(qi)就是由電(dian)阻應變(bian)(bian)片、彈(dan)性體和惠斯頓橋(qiao)路(lu)組成(cheng),后端還需要儀(yi)表或者變(bian)(bian)送器(qi),將電(dian)壓信號轉換(huan)成(cheng)數字量。
目前數字(zi)式(shi)傳(chuan)感(gan)(gan)器在傳(chuan)感(gan)(gan)器內集成了(le)A/D轉換(huan),直接(jie)輸出數字(zi)量信號,可直接(jie)供客戶使(shi)用(yong)。對(dui)于(yu)多傳(chuan)感(gan)(gan)器稱重(zhong)系統,客戶還需要進行(xing)稱重(zhong)相關的設置,因此,一(yi)般(ban)數字(zi)傳(chuan)感(gan)(gan)器還需要配(pei)合儀表一(yi)起使(shi)用(yong)。