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  彈(dan)性體（彈(dan)性元(yuan)件(jian)，敏(min)感梁）在(zai)外力(li)作用下產(chan)生(sheng)彈(dan)性變(bian)(bian)形(xing)(xing)(xing)，使(shi)粘(zhan)貼在(zai)他表(biao)面的電(dian)阻(zu)應(ying)變(bian)(bian)片(pian)（轉(zhuan)(zhuan)換元(yuan)件(jian)）也(ye)隨同產(chan)生(sheng)變(bian)(bian)形(xing)(xing)(xing)，電(dian)阻(zu)應(ying)變(bian)(bian)片(pian)變(bian)(bian)形(xing)(xing)(xing)后，它(ta)的阻(zu)值將發生(sheng)變(bian)(bian)化(hua)（增大(da)或(huo)減小），再經過惠斯頓電(dian)橋將這一電(dian)阻(zu)變(bian)(bian)化(hua)轉(zhuan)(zhuan)換為電(dian)壓信(xin)號，從而完成了將外力(li)變(bian)(bian)換為電(dian)信(xin)號的過程。

  傳統(tong)的模擬式(shi)電(dian)阻應變(bian)式(shi)傳感器就是由電(dian)阻應變(bian)片、彈性體(ti)和惠斯頓橋路組成，后端(duan)還需要儀表或者變(bian)送(song)器，將電(dian)壓(ya)信號轉換成數字(zi)量。

  目前數(shu)字式傳感器(qi)在(zai)傳感器(qi)內集成了A/D轉換，直接(jie)輸出數(shu)字量(liang)信號，可直接(jie)供客戶使(shi)(shi)用。對于(yu)多傳感器(qi)稱(cheng)(cheng)重(zhong)系統，客戶還(huan)需(xu)要(yao)進行稱(cheng)(cheng)重(zhong)相(xiang)關的設置，因(yin)此，一般(ban)數(shu)字傳感器(qi)還(huan)需(xu)要(yao)配(pei)合儀(yi)表一起使(shi)(shi)用。