彈性(xing)體(彈性(xing)元(yuan)件(jian),敏(min)感梁)在外力(li)作(zuo)用下產生(sheng)(sheng)彈性(xing)變(bian)(bian)形,使粘(zhan)貼在他表面的電(dian)(dian)(dian)阻應變(bian)(bian)片(轉換(huan)元(yuan)件(jian))也隨同(tong)產生(sheng)(sheng)變(bian)(bian)形,電(dian)(dian)(dian)阻應變(bian)(bian)片變(bian)(bian)形后,它(ta)的阻值將(jiang)發生(sheng)(sheng)變(bian)(bian)化(增大或減小),再經過(guo)惠斯(si)頓電(dian)(dian)(dian)橋將(jiang)這一(yi)電(dian)(dian)(dian)阻變(bian)(bian)化轉換(huan)為電(dian)(dian)(dian)壓信(xin)(xin)號,從而完成了將(jiang)外力(li)變(bian)(bian)換(huan)為電(dian)(dian)(dian)信(xin)(xin)號的過(guo)程。
傳統的模(mo)擬式電阻(zu)應變(bian)式傳感器(qi)(qi)就(jiu)是由(you)電阻(zu)應變(bian)片、彈性體和惠斯頓橋(qiao)路組成,后端還需要儀表或者變(bian)送器(qi)(qi),將電壓信號轉(zhuan)換成數字(zi)量(liang)。
目前數字式傳感(gan)器在傳感(gan)器內(nei)集成了A/D轉換,直接(jie)輸出數字量(liang)信號(hao),可(ke)直接(jie)供客戶(hu)使用。對于多傳感(gan)器稱重系(xi)統,客戶(hu)還(huan)需要進行(xing)稱重相關(guan)的設(she)置,因(yin)此,一般(ban)數字傳感(gan)器還(huan)需要配合(he)儀表一起使用。