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  彈性體（彈性元件(jian)，敏感梁(liang)）在外力作用(yong)下產生彈性變(bian)(bian)形，使(shi)粘貼在他表面的(de)電(dian)(dian)(dian)阻(zu)應(ying)變(bian)(bian)片（轉換元件(jian)）也隨同(tong)產生變(bian)(bian)形，電(dian)(dian)(dian)阻(zu)應(ying)變(bian)(bian)片變(bian)(bian)形后，它的(de)阻(zu)值將(jiang)(jiang)發生變(bian)(bian)化（增大或減小(xiao)），再經(jing)過惠斯頓電(dian)(dian)(dian)橋將(jiang)(jiang)這(zhe)一電(dian)(dian)(dian)阻(zu)變(bian)(bian)化轉換為電(dian)(dian)(dian)壓信號(hao)，從而完成了將(jiang)(jiang)外力變(bian)(bian)換為電(dian)(dian)(dian)信號(hao)的(de)過程。

  傳統的模擬式(shi)電(dian)阻應變(bian)式(shi)傳感器(qi)就是由(you)電(dian)阻應變(bian)片、彈性體和(he)惠斯頓(dun)橋(qiao)路(lu)組成，后端(duan)還需要儀表或者變(bian)送(song)器(qi)，將電(dian)壓信號轉換成數字量。

  目前(qian)數(shu)字(zi)式傳感(gan)器(qi)在傳感(gan)器(qi)內(nei)集成了(le)A/D轉換，直接輸(shu)出數(shu)字(zi)量信號，可直接供客戶使(shi)用(yong)。對于多傳感(gan)器(qi)稱重(zhong)系統，客戶還(huan)需要進(jin)行(xing)稱重(zhong)相關的設置，因(yin)此，一般(ban)數(shu)字(zi)傳感(gan)器(qi)還(huan)需要配(pei)合儀表一起使(shi)用(yong)。