彈(dan)性(xing)(xing)體(彈(dan)性(xing)(xing)元(yuan)件,敏感梁)在外(wai)力(li)作用下產(chan)生彈(dan)性(xing)(xing)變(bian)(bian)(bian)形(xing),使粘貼在他表面的電(dian)阻(zu)(zu)應變(bian)(bian)(bian)片(pian)(轉(zhuan)換元(yuan)件)也隨同產(chan)生變(bian)(bian)(bian)形(xing),電(dian)阻(zu)(zu)應變(bian)(bian)(bian)片(pian)變(bian)(bian)(bian)形(xing)后,它(ta)的阻(zu)(zu)值將發(fa)生變(bian)(bian)(bian)化(hua)(增(zeng)大(da)或減小),再經過惠斯頓電(dian)橋將這(zhe)一電(dian)阻(zu)(zu)變(bian)(bian)(bian)化(hua)轉(zhuan)換為電(dian)壓信號,從而完成了將外(wai)力(li)變(bian)(bian)(bian)換為電(dian)信號的過程(cheng)。
傳統的模擬式電阻(zu)應(ying)變式傳感器(qi)就是由電阻(zu)應(ying)變片、彈性體和惠斯頓橋路組成,后(hou)端還需要儀(yi)表(biao)或(huo)者變送(song)器(qi),將(jiang)電壓信號轉換成數字量(liang)。
目前數(shu)字式傳感器(qi)在傳感器(qi)內集成(cheng)了A/D轉換,直接輸出數(shu)字量信號,可直接供客(ke)戶使用(yong)。對于多傳感器(qi)稱重系統,客(ke)戶還需要進行稱重相關的設(she)置,因此,一(yi)般數(shu)字傳感器(qi)還需要配合儀表一(yi)起(qi)使用(yong)。