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傳感器(qi)采用(yong)壓(ya)阻(zu)式應(ying)變(bian)(bian)(bian)(bian)原理，它(ta)的(de)(de)(de)核心部(bu)件(jian)電(dian)阻(zu)應(ying)變(bian)(bian)(bian)(bian)片(pian)(pian)是(shi)(shi)一(yi)(yi)種(zhong)(zhong)(zhong)將被測(ce)件(jian)上(shang)的(de)(de)(de)應(ying)變(bian)(bian)(bian)(bian)變(bian)(bian)(bian)(bian)化(hua)轉換成為一(yi)(yi)種(zhong)(zhong)(zhong)電(dian)信(xin)號(hao)的(de)(de)(de)敏(min)感器(qi)件(jian)。它(ta)是(shi)(shi)傳感器(qi)的(de)(de)(de)主(zhu)要組成部(bu)分之一(yi)(yi)。電(dian)阻(zu)應(ying)變(bian)(bian)(bian)(bian)片(pian)(pian)應(ying)用(yong)最多(duo)的(de)(de)(de)是(shi)(shi)金屬(shu)電(dian)阻(zu)應(ying)變(bian)(bian)(bian)(bian)片(pian)(pian)和半導體應(ying)變(bian)(bian)(bian)(bian)片(pian)(pian)兩種(zhong)(zhong)(zhong)。金屬(shu)電(dian)阻(zu)應(ying)變(bian)(bian)(bian)(bian)片(pian)(pian)又有(you)絲狀應(ying)變(bian)(bian)(bian)(bian)片(pian)(pian)和金屬(shu)箔狀應(ying)變(bian)(bian)(bian)(bian)片(pian)(pian)兩種(zhong)(zhong)(zhong)。通(tong)常是(shi)(shi)將應(ying)變(bian)(bian)(bian)(bian)片(pian)(pian)通(tong)過特殊的(de)(de)(de)粘(zhan)和劑緊密的(de)(de)(de)粘(zhan)合在產生(sheng)力(li)學應(ying)變(bian)(bian)(bian)(bian)基體上(shang)，當(dang)基體受力(li)發生(sheng)應(ying)力(li)變(bian)(bian)(bian)(bian)化(hua)時，電(dian)阻(zu)應(ying)變(bian)(bian)(bian)(bian)片(pian)(pian)也一(yi)(yi)起產生(sheng)形變(bian)(bian)(bian)(bian)，使(shi)(shi)應(ying)變(bian)(bian)(bian)(bian)片(pian)(pian)的(de)(de)(de)阻(zu)值(zhi)發生(sheng)改(gai)變(bian)(bian)(bian)(bian)，從(cong)而(er)(er)使(shi)(shi)加在電(dian)阻(zu)上(shang)的(de)(de)(de)電(dian)壓(ya)發生(sheng)變(bian)(bian)(bian)(bian)化(hua)。這(zhe)種(zhong)(zhong)(zhong)應(ying)變(bian)(bian)(bian)(bian)片(pian)(pian)在受力(li)時產生(sheng)的(de)(de)(de)阻(zu)值(zhi)變(bian)(bian)(bian)(bian)化(hua)通(tong)常較小，一(yi)(yi)般(ban)這(zhe)種(zhong)(zhong)(zhong)應(ying)變(bian)(bian)(bian)(bian)片(pian)(pian)都組成應(ying)變(bian)(bian)(bian)(bian)電(dian)橋，從(cong)而(er)(er)使(shi)(shi)阻(zu)抗的(de)(de)(de)變(bian)(bian)(bian)(bian)化(hua)轉換成數字信(xin)號(hao)。