電(dian)(dian)(dian)阻(zu)應(ying)(ying)變(bian)(bian)(bian)片(pian)(pian)的(de)(de)靈(ling)敏(min)(min)(min)系數(shu)(shu)，貼在構件(jian)上的(de)(de)電(dian)(dian)(dian)阻(zu)應(ying)(ying)變(bian)(bian)(bian)片(pian)(pian)，由于(yu)構件(jian)產生應(ying)(ying)變(bian)(bian)(bian)。應(ying)(ying)變(bian)(bian)(bian)片(pian)(pian)產生了微小的(de)(de)電(dian)(dian)(dian)阻(zu)變(bian)(bian)(bian)化。電(dian)(dian)(dian)阻(zu)變(bian)(bian)(bian)化率(△R/R)與應(ying)(ying)變(bian)(bian)(bian)(ε=△L/L)之比稱為(wei)應(ying)(ying)變(bian)(bian)(bian)片(pian)(pian)的(de)(de)靈(ling)敏(min)(min)(min)系數(shu)(shu)(K)。根據推導，電(dian)(dian)(dian)阻(zu)絲(si)(si)(si)單絲(si)(si)(si)的(de)(de)靈(ling)敏(min)(min)(min)系數(shu)(shu)KS主(zhu)(zhu)要與電(dian)(dian)(dian)阻(zu)絲(si)(si)(si)材(cai)料(liao)的(de)(de)波桑(sang)比有關，因而為(wei)一常(chang)數(shu)(shu)。通(tong)常(chang)所用(yong)(yong)的(de)(de)柵(zha)狀(zhuang)電(dian)(dian)(dian)阻(zu)絲(si)(si)(si)應(ying)(ying)變(bian)(bian)(bian)片(pian)(pian)，由于(yu)電(dian)(dian)(dian)阻(zu)應(ying)(ying)變(bian)(bian)(bian)片(pian)(pian)兩端的(de)(de)阻(zu)絲(si)(si)(si)有圓弧(hu)彎(wan)轉部分，所以不僅沿電(dian)(dian)(dian)阻(zu)絲(si)(si)(si)方向的(de)(de)應(ying)(ying)變(bian)(bian)(bian)能使(shi)應(ying)(ying)變(bian)(bian)(bian)片(pian)(pian)產生電(dian)(dian)(dian)阻(zu)變(bian)(bian)(bian)化，而垂直(zhi)于(yu)電(dian)(dian)(dian)阻(zu)絲(si)(si)(si)方向的(de)(de)應(ying)(ying)變(bian)(bian)(bian)亦使(shi)應(ying)(ying)變(bian)(bian)(bian)片(pian)(pian)產生部分電(dian)(dian)(dian)阻(zu)變(bian)(bian)(bian)化。這種現象稱為(wei)應(ying)(ying)變(bian)(bian)(bian)片(pian)(pian)的(de)(de)橫向效應(ying)(ying)。因此應(ying)(ying)變(bian)(bian)(bian)片(pian)(pian)的(de)(de)靈(ling)敏(min)(min)(min)系數(shu)(shu)與電(dian)(dian)(dian)阻(zu)絲(si)(si)(si)單絲(si)(si)(si)的(de)(de)靈(ling)敏(min)(min)(min)系數(shu)(shu)有所不同(tong)，但仍接近于(yu)常(chang)數(shu)(shu)。振弦式(shi)內埋應(ying)(ying)變(bian)(bian)(bian)計(ji)，主(zhu)(zhu)要應(ying)(ying)用(yong)(yong)于(yu)：橋梁在線(xian)監(jian)測(ce)、隧道在線(xian)監(jian)測(ce)、大壩監(jian)測(ce)、基樁(zhuang)等混凝土結構內部的(de)(de)應(ying)(ying)變(bian)(bian)(bian)測(ce)量。上海振弦式(shi)土壓(ya)力應(ying)(ying)變(bian)(bian)(bian)計(ji)線(xian)性度

應(ying)(ying)變(bian)(bian)(bian)計(ji)(ji)(ji)的防(fang)(fang)護處理,對已(yi)安裝好的應(ying)(ying)變(bian)(bian)(bian)計(ji)(ji)(ji)采取可靠實用(yong)(yong)的防(fang)(fang)護措施，是保證(zheng)應(ying)(ying)變(bian)(bian)(bian)計(ji)(ji)(ji)正(zheng)常工作(zuo)，提高測試精度的有效(xiao)(xiao)途(tu)(tu)徑(jing)。應(ying)(ying)變(bian)(bian)(bian)計(ji)(ji)(ji)防(fang)(fang)護的根本途(tu)(tu)徑(jing)，是利用(yong)(yong)一定的材料或介質將應(ying)(ying)變(bian)(bian)(bian)計(ji)(ji)(ji)連(lian)同其(qi)附件與惡劣環境隔(ge)開，所以首先在(zai)應(ying)(ying)變(bian)(bian)(bian)計(ji)(ji)(ji)安裝和使用(yong)(yong)過程(cheng)中，謹慎、細(xi)心地操(cao)作(zuo)，保持(chi)不用(yong)(yong)手直(zhi)接(jie)接(jie)觸(chu)就是一種(zhong)有效(xiao)(xiao)的防(fang)(fang)護措施;其(qi)次(ci)就是利用(yong)(yong)涂敷保護層來進行防(fang)(fang)護，應(ying)(ying)變(bian)(bian)(bian)計(ji)(ji)(ji)的防(fang)(fang)護一般可選用(yong)(yong)AZ-709膠(jiao)，對裸露部份進行防(fang)(fang)護，要求涂刷均勻，然后覆(fu)蓋南大703、704、D04等硅橡膠(jiao)即(ji)可。合肥電(dian)阻應(ying)(ying)變(bian)(bian)(bian)計(ji)(ji)(ji)廠家直(zhi)銷夾具固定后，輕(qing)輕(qing)拆下(xia)安裝試棒，將表面應(ying)(ying)變(bian)(bian)(bian)計(ji)(ji)(ji)從夾具一端(duan)放入，到表面應(ying)(ying)變(bian)(bian)(bian)計(ji)(ji)(ji)各端(duan)面與夾具外邊沿平齊為(wei)止。

應(ying)(ying)(ying)(ying)變(bian)(bian)計(ji)（有時稱為應(ying)(ying)(ying)(ying)變(bian)(bian)片(pian)）是(shi)(shi)(shi)(shi)電阻(zu)隨力(li)(li)(li)變(bian)(bian)化(hua)(hua)的(de)傳感(gan)器(qi)(qi)。它將(jiang)力(li)(li)(li)、壓力(li)(li)(li)、張(zhang)力(li)(li)(li)、重(zhong)(zhong)量(liang)(liang)等物(wu)理量(liang)(liang)轉化(hua)(hua)為阻(zu)力(li)(li)(li)的(de)變(bian)(bian)化(hua)(hua)，從而測(ce)(ce)量(liang)(liang)這些物(wu)理量(liang)(liang)。當外力(li)(li)(li)作(zuo)用(yong)(yong)在固定(ding)物(wu)體(ti)上時，會產生(sheng)應(ying)(ying)(ying)(ying)力(li)(li)(li)和(he)應(ying)(ying)(ying)(ying)變(bian)(bian)。人體(ti)產生(sheng)的(de)反(fan)作(zuo)用(yong)(yong)力(li)(li)(li)（對外力(li)(li)(li)的(de)反(fan)作(zuo)用(yong)(yong)力(li)(li)(li)）是(shi)(shi)(shi)(shi)應(ying)(ying)(ying)(ying)力(li)(li)(li)，位(wei)移和(he)變(bian)(bian)形是(shi)(shi)(shi)(shi)應(ying)(ying)(ying)(ying)變(bian)(bian)。應(ying)(ying)(ying)(ying)變(bian)(bian)片(pian)是(shi)(shi)(shi)(shi)電測(ce)(ce)量(liang)(liang)技術中較(jiao)重(zhong)(zhong)要的(de)傳感(gan)器(qi)(qi)之一，用(yong)(yong)于測(ce)(ce)量(liang)(liang)機械量(liang)(liang)。顧(gu)名思義，應(ying)(ying)(ying)(ying)變(bian)(bian)計(ji)主(zhu)要用(yong)(yong)于應(ying)(ying)(ying)(ying)變(bian)(bian)測(ce)(ce)量(liang)(liang)。作(zuo)為一個術語，“應(ying)(ying)(ying)(ying)變(bian)(bian)”包括拉(la)伸應(ying)(ying)(ying)(ying)變(bian)(bian)和(he)壓縮應(ying)(ying)(ying)(ying)變(bian)(bian)，這是(shi)(shi)(shi)(shi)區分正(zheng)負符號。因此，應(ying)(ying)(ying)(ying)變(bian)(bian)計(ji)可以測(ce)(ce)量(liang)(liang)膨脹和(he)收(shou)縮。看了(le)上文的(de)介紹后希望能(neng)幫助到你。

實(shi)際(ji)(ji)上，任何材料的(de)(de)體(ti)積都會(hui)(hui)隨溫度(du)(du)變(bian)(bian)(bian)化(hua)(hua)(hua)而發生(sheng)(sheng)輕微改(gai)變(bian)(bian)(bian)，絕大多數(shu)(shu)是(shi)熱脹(zhang)冷縮(suo)，且不同(tong)材料的(de)(de)伸(shen)縮(suo)率(lv)各不相同(tong)，體(ti)現這一特性的(de)(de)物(wu)(wu)(wu)理名詞叫做線(xian)膨脹(zhang)系數(shu)(shu)，即材料單位溫度(du)(du)變(bian)(bian)(bian)化(hua)(hua)(hua)下的(de)(de)應(ying)(ying)(ying)(ying)(ying)變(bian)(bian)(bian)量(liang)(liang)，單位是(shi)10-6/℃。假設被(bei)(bei)測物(wu)(wu)(wu)內部應(ying)(ying)(ying)(ying)(ying)力(li)應(ying)(ying)(ying)(ying)(ying)變(bian)(bian)(bian)沒有發生(sheng)(sheng)變(bian)(bian)(bian)化(hua)(hua)(hua)，但是(shi)溫度(du)(du)升高了，熱脹(zhang)冷縮(suo)造成被(bei)(bei)測物(wu)(wu)(wu)L長(chang)度(du)(du)內產(chan)生(sheng)(sheng)了ΔL的(de)(de)伸(shen)長(chang)，因此產(chan)生(sheng)(sheng)了應(ying)(ying)(ying)(ying)(ying)變(bian)(bian)(bian)，實(shi)際(ji)(ji)計(ji)算時，應(ying)(ying)(ying)(ying)(ying)把(ba)這部分因為(wei)溫度(du)(du)變(bian)(bian)(bian)化(hua)(hua)(hua)產(chan)生(sheng)(sheng)的(de)(de)應(ying)(ying)(ying)(ying)(ying)變(bian)(bian)(bian)給去(qu)除。同(tong)理，應(ying)(ying)(ying)(ying)(ying)變(bian)(bian)(bian)計(ji)自(zi)身也會(hui)(hui)因為(wei)溫度(du)(du)變(bian)(bian)(bian)化(hua)(hua)(hua)生(sheng)(sheng)產(chan)額外的(de)(de)應(ying)(ying)(ying)(ying)(ying)變(bian)(bian)(bian)，實(shi)際(ji)(ji)測量(liang)(liang)時應(ying)(ying)(ying)(ying)(ying)把(ba)被(bei)(bei)測物(wu)(wu)(wu)和應(ying)(ying)(ying)(ying)(ying)變(bian)(bian)(bian)計(ji)因為(wei)溫度(du)(du)變(bian)(bian)(bian)化(hua)(hua)(hua)產(chan)生(sheng)(sheng)的(de)(de)疊(die)加應(ying)(ying)(ying)(ying)(ying)變(bian)(bian)(bian)修(xiu)正掉(diao)。應(ying)(ying)(ying)(ying)(ying)變(bian)(bian)(bian)計(ji)將力(li)、壓力(li)、張力(li)、重(zhong)量(liang)(liang)等物(wu)(wu)(wu)理量(liang)(liang)轉化(hua)(hua)(hua)為(wei)電阻的(de)(de)變(bian)(bian)(bian)化(hua)(hua)(hua)，從而測量(liang)(liang)這些物(wu)(wu)(wu)理量(liang)(liang)。

表面(mian)應(ying)(ying)(ying)(ying)變(bian)(bian)(bian)(bian)計(ji)(ji)的(de)(de)(de)埋設(she)(she)與安(an)(an)裝(zhuang)(zhuang)(zhuang)(zhuang)，首(shou)先將(jiang)(jiang)(jiang)(jiang)配(pei)好(hao)對的(de)(de)(de)夾(jia)(jia)具(ju)(ju)(ju)裝(zhuang)(zhuang)(zhuang)(zhuang)上(shang)安(an)(an)裝(zhuang)(zhuang)(zhuang)(zhuang)試(shi)棒(bang)(bang)，裝(zhuang)(zhuang)(zhuang)(zhuang)配(pei)好(hao)后的(de)(de)(de)兩夾(jia)(jia)具(ju)(ju)(ju)緊(jin)定(ding)螺(luo)釘孔(kong)距(ju)應(ying)(ying)(ying)(ying)為100mm。用(yong)(yong)裝(zhuang)(zhuang)(zhuang)(zhuang)有(you)(you)安(an)(an)裝(zhuang)(zhuang)(zhuang)(zhuang)棒(bang)(bang)的(de)(de)(de)夾(jia)(jia)具(ju)(ju)(ju)在(zai)需要測(ce)量(liang)的(de)(de)(de)部(bu)位(wei)(wei)畫點，在(zai)畫點的(de)(de)(de)部(bu)位(wei)(wei)打上(shang)膨(peng)脹螺(luo)栓(shuan)的(de)(de)(de)孔(kong)，用(yong)(yong)于固(gu)(gu)定(ding)膨(peng)脹螺(luo)栓(shuan)。將(jiang)(jiang)(jiang)(jiang)裝(zhuang)(zhuang)(zhuang)(zhuang)有(you)(you)安(an)(an)裝(zhuang)(zhuang)(zhuang)(zhuang)試(shi)棒(bang)(bang)的(de)(de)(de)夾(jia)(jia)具(ju)(ju)(ju)固(gu)(gu)定(ding)在(zai)膨(peng)脹螺(luo)栓(shuan)上(shang)，擰緊(jin)螺(luo)母(mu)，安(an)(an)裝(zhuang)(zhuang)(zhuang)(zhuang)好(hao)后的(de)(de)(de)兩夾(jia)(jia)具(ju)(ju)(ju)膨(peng)脹螺(luo)釘標(biao)距(ju)也應(ying)(ying)(ying)(ying)為100mm。用(yong)(yong)于臨時測(ce)量(liang)的(de)(de)(de)應(ying)(ying)(ying)(ying)變(bian)(bian)(bian)(bian)計(ji)(ji)一(yi)般是用(yong)(yong)膠粘(zhan)貼(tie)，首(shou)先將(jiang)(jiang)(jiang)(jiang)需要粘(zhan)貼(tie)的(de)(de)(de)部(bu)位(wei)(wei)去毛打平，將(jiang)(jiang)(jiang)(jiang)裝(zhuang)(zhuang)(zhuang)(zhuang)有(you)(you)安(an)(an)裝(zhuang)(zhuang)(zhuang)(zhuang)試(shi)棒(bang)(bang)的(de)(de)(de)夾(jia)(jia)具(ju)(ju)(ju)底部(bu)中間涂上(shang)快速環氧膠，四周點上(shang)少許502膠水，之后粘(zhan)貼(tie)在(zai)測(ce)量(liang)部(bu)位(wei)(wei)上(shang)，加壓(ya)力3分鐘左右(you)即可松手，10分鐘左右(you)即可粘(zhan)貼(tie)牢固(gu)(gu)。拆(chai)下安(an)(an)裝(zhuang)(zhuang)(zhuang)(zhuang)試(shi)棒(bang)(bang)，將(jiang)(jiang)(jiang)(jiang)應(ying)(ying)(ying)(ying)變(bian)(bian)(bian)(bian)計(ji)(ji)(已接長電(dian)(dian)(dian)纜)從夾(jia)(jia)具(ju)(ju)(ju)一(yi)端(duan)(duan)(duan)放入，直(zhi)到(dao)應(ying)(ying)(ying)(ying)變(bian)(bian)(bian)(bian)計(ji)(ji)沒(mei)(mei)有(you)(you)電(dian)(dian)(dian)纜的(de)(de)(de)一(yi)端(duan)(duan)(duan)與夾(jia)(jia)具(ju)(ju)(ju)外(wai)邊沿(yan)平齊為止(zhi)。應(ying)(ying)(ying)(ying)變(bian)(bian)(bian)(bian)計(ji)(ji)安(an)(an)裝(zhuang)(zhuang)(zhuang)(zhuang)時應(ying)(ying)(ying)(ying)根據設(she)(she)計(ji)(ji)要求調(diao)(diao)整(zheng)測(ce)量(liang)范圍，在(zai)儀器(qi)的(de)(de)(de)后端(duan)(duan)(duan)座(zuo)上(shang)(沒(mei)(mei)有(you)(you)電(dian)(dian)(dian)纜的(de)(de)(de)一(yi)端(duan)(duan)(duan))有(you)(you)一(yi)個M6的(de)(de)(de)螺(luo)孔(kong)，可用(yong)(yong)M6螺(luo)桿進(jin)行拉、壓(ya)調(diao)(diao)整(zheng)。調(diao)(diao)整(zheng)時先將(jiang)(jiang)(jiang)(jiang)有(you)(you)電(dian)(dian)(dian)纜一(yi)端(duan)(duan)(duan)的(de)(de)(de)夾(jia)(jia)具(ju)(ju)(ju)擰緊(jin)，松開夾(jia)(jia)具(ju)(ju)(ju)另一(yi)端(duan)(duan)(duan)，進(jin)行拉、壓(ya)調(diao)(diao)整(zheng)。調(diao)(diao)整(zheng)完成(cheng)后將(jiang)(jiang)(jiang)(jiang)夾(jia)(jia)具(ju)(ju)(ju)擰緊(jin)并擰下螺(luo)桿，安(an)(an)裝(zhuang)(zhuang)(zhuang)(zhuang)保護罩，同時將(jiang)(jiang)(jiang)(jiang)電(dian)(dian)(dian)纜按設(she)(she)計(ji)(ji)走(zou)向固(gu)(gu)定(ding)好(hao)。振弦式(shi)應(ying)(ying)(ying)(ying)變(bian)(bian)(bian)(bian)計(ji)(ji)傳感器(qi)結構簡單，工(gong)作可靠。合肥電(dian)(dian)(dian)阻應(ying)(ying)(ying)(ying)變(bian)(bian)(bian)(bian)計(ji)(ji)廠家直(zhi)銷

裂紋(wen)擴(kuo)展(zhan)應(ying)變計，裂紋(wen)擴(kuo)展(zhan)應(ying)變計的敏(min)感(gan)柵是由平行柵條組成。上(shang)海振弦(xian)式土(tu)壓(ya)力(li)應(ying)變計線(xian)性度

應(ying)變(bian)(bian)(bian)計(ji)(ji)使(shi)用中容易出現的(de)(de)(de)(de)(de)問(wen)題和對策：零(ling)點(dian)漂移(yi)(yi)(yi)，我(wo)(wo)(wo)們知道在(zai)應(ying)變(bian)(bian)(bian)計(ji)(ji)應(ying)用中較(jiao)容易出現，也是(shi)(shi)較(jiao)難控制(zhi)的(de)(de)(de)(de)(de)就是(shi)(shi)零(ling)點(dian)漂移(yi)(yi)(yi)，零(ling)點(dian)漂移(yi)(yi)(yi)受各種(zhong)因(yin)素的(de)(de)(de)(de)(de)影響(xiang)，以下(xia)我(wo)(wo)(wo)們就詳細(xi)進行(xing)分析。絕(jue)(jue)緣電(dian)阻(zu)的(de)(de)(de)(de)(de)影響(xiang)，絕(jue)(jue)緣電(dian)阻(zu)是(shi)(shi)應(ying)變(bian)(bian)(bian)計(ji)(ji)的(de)(de)(de)(de)(de)重要電(dian)性(xing)(xing)能指標，它(ta)的(de)(de)(de)(de)(de)大(da)小表(biao)現較(jiao)直接(jie)的(de)(de)(de)(de)(de)就是(shi)(shi)應(ying)變(bian)(bian)(bian)計(ji)(ji)的(de)(de)(de)(de)(de)零(ling)點(dian)漂移(yi)(yi)(yi)。所謂(wei)絕(jue)(jue)緣電(dian)阻(zu)就是(shi)(shi)應(ying)變(bian)(bian)(bian)計(ji)(ji)敏感柵(zha)與被測(ce)構件或(huo)彈(dan)(dan)性(xing)(xing)體之(zhi)間的(de)(de)(de)(de)(de)電(dian)阻(zu)，如果絕(jue)(jue)緣強度降(jiang)低或(huo)較(jiao)低時，敏感柵(zha)和構件之(zhi)間或(huo)彈(dan)(dan)性(xing)(xing)體之(zhi)間就會有漏(lou)電(dian)流產生(sheng)，進而影響(xiang)到(dao)應(ying)變(bian)(bian)(bian)計(ji)(ji)的(de)(de)(de)(de)(de)零(ling)點(dian)穩定性(xing)(xing)，即(ji)為漂移(yi)(yi)(yi)。那么產生(sheng)這一問(wen)題的(de)(de)(de)(de)(de)因(yin)素有哪些，如何解決(jue)，是(shi)(shi)我(wo)(wo)(wo)們所關心的(de)(de)(de)(de)(de)。應(ying)變(bian)(bian)(bian)計(ji)(ji)焊接(jie)后，助(zhu)焊劑(ji)未(wei)清洗(xi)或(huo)清洗(xi)不(bu)干凈，引(yin)起絕(jue)(jue)緣強度下(xia)降(jiang)。焊劑(ji)一般(ban)是(shi)(shi)活性(xing)(xing)好(hao)、浸潤(run)性(xing)(xing)好(hao)的(de)(de)(de)(de)(de)材料，利(li)于(yu)焊錫和焊端結合(he)，但(dan)它(ta)也往(wang)(wang)往(wang)(wang)是(shi)(shi)一種(zhong)離(li)子(zi)物體，如果沒有進行(xing)清洗(xi)或(huo)清洗(xi)不(bu)徹底，陽(yang)離(li)子(zi)就會進行(xing)遷移(yi)(yi)(yi)，引(yin)起絕(jue)(jue)緣強度不(bu)能滿足要求。上海振弦(xian)式(shi)土(tu)壓力應(ying)變(bian)(bian)(bian)計(ji)(ji)線性(xing)(xing)度

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