技術領域

本發明涉及(ji)一種傳感器及(ji)其(qi)制造方法，特別(bie)涉及(ji)一種用于在(zai)某一狹(xia)小接觸區域中對(dui)一點接觸物體間的壓力(li)或集(ji)中力(li)進行檢測(ce)的柔性單點力(li)片(pian)式傳感器及(ji)其(qi)制造方法。

背景技術

壓力(li)傳(chuan)感器及檢(jian)測(ce)技術在航(hang)(hang)空(kong)航(hang)(hang)天(tian)、軍事工(gong)業、汽車、船舶制(zhi)造、工(gong)業自動化、醫(yi)學研(yan)究(jiu)、生(sheng)物(wu)醫(yi)療等領域(yu)中(zhong)發揮著重要的(de)作(zuo)用(yong)(yong)(yong)。然而在上述(shu)(shu)應用(yong)(yong)(yong)領域(yu)，許多場合需在某一狹小(xiao)空(kong)間(jian)(jian)中(zhong)對某一點接觸物(wu)體(ti)間(jian)(jian)的(de)壓力(li)或集(ji)中(zhong)力(li)進行檢(jian)測(ce)，例(li)如點接觸物(wu)體(ti)間(jian)(jian)在運動過程中(zhong)摩擦力(li)相互作(zuo)用(yong)(yong)(yong)過程的(de)研(yan)究(jiu)、例(li)如檢(jian)測(ce)空(kong)間(jian)(jian)凸輪(lun)與滾子從動件處于點接觸狀態(tai)下的(de)相互作(zuo)用(yong)(yong)(yong)力(li)、檢(jian)測(ce)某一對牙齒(chi)嚙合時的(de)相互作(zuo)用(yong)(yong)(yong)力(li)等。由于受到傳(chuan)感器重量、體(ti)積以及工(gong)作(zuo)空(kong)間(jian)(jian)(如狹縫)的(de)限制(zhi)，這(zhe)時傳(chuan)統壓力(li)傳(chuan)感器便(bian)(bian)不能(neng)用(yong)(yong)(yong)于上述(shu)(shu)場合下的(de)使用(yong)(yong)(yong)來檢(jian)測(ce)某一點接觸物(wu)體(ti)間(jian)(jian)的(de)壓力(li)或集(ji)中(zhong)力(li)。即便(bian)(bian)勉強使用(yong)(yong)(yong)，也(ye)不能(neng)滿足操作(zuo)便(bian)(bian)捷的(de)要求，

發明內容

本發明針對(dui)傳(chuan)統壓力(li)傳(chuan)感器不能對(dui)某一點接觸物(wu)體(ti)間壓力(li)進行檢測、體(ti)積(ji)大、重(zhong)(zhong)量(liang)重(zhong)(zhong)、操(cao)作(zuo)不方便(bian)(bian)的缺(que)點；提供了一種能夠檢測出某一點接觸物(wu)體(ti)間壓力(li)的柔性單點力(li)片式傳(chuan)感器，該(gai)傳(chuan)感器具有體(ti)積(ji)小、重(zhong)(zhong)量(liang)輕、制(zhi)作(zuo)簡(jian)單、可(ke)低成本批量(liang)化生(sheng)產的特點，并(bing)且可(ke)重(zhong)(zhong)復使用、操(cao)作(zuo)簡(jian)便(bian)(bian)。

本發明的(de)另一(yi)個目的(de)是提供(gong)一(yi)種該傳感器的(de)制造(zao)方法。

為達到上述(shu)目的(de)，本(ben)發明(ming)是(shi)采(cai)取如(ru)下技術(shu)方案予以實現的(de)：

一種柔(rou)性單點力片(pian)(pian)式傳感器，包(bao)括壓(ya)敏(min)體(ti)、分別設(she)(she)置在壓(ya)敏(min)體(ti)上(shang)下(xia)(xia)(xia)(xia)端(duan)面的(de)(de)(de)兩(liang)(liang)個電(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)接片(pian)(pian)，其特征在于(yu)，還(huan)包(bao)括有形狀大小(xiao)相(xiang)同(tong)的(de)(de)(de)上(shang)基(ji)(ji)板(ban)(ban)和(he)下(xia)(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)，上(shang)、下(xia)(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)之間(jian)(jian)由粘接層封接；在上(shang)基(ji)(ji)板(ban)(ban)長度方向的(de)(de)(de)一側設(she)(she)置有一凸起；在相(xiang)對該凸起的(de)(de)(de)下(xia)(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)上(shang)設(she)(she)置有一凹陷(xian)，該凹陷(xian)與所述凸起之間(jian)(jian)形成一個密閉的(de)(de)(de)壓(ya)敏(min)體(ti)室(shi)，其中(zhong)封裝(zhuang)有所述的(de)(de)(de)壓(ya)敏(min)體(ti)及電(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)接片(pian)(pian)，所述壓(ya)敏(min)體(ti)室(shi)的(de)(de)(de)大小(xiao)剛(gang)好與壓(ya)敏(min)體(ti)的(de)(de)(de)大小(xiao)吻合；所述下(xia)(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)1沿其長度方向設(she)(she)置有兩(liang)(liang)條相(xiang)互平行的(de)(de)(de)印刷電(dian)(dian)(dian)極(ji)(ji)6，每個印刷電(dian)(dian)(dian)極(ji)(ji)分別連(lian)(lian)接位(wei)于(yu)壓(ya)敏(min)體(ti)上(shang)或下(xia)(xia)(xia)(xia)端(duan)面的(de)(de)(de)電(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)接片(pian)(pian)9和(he)伸出(chu)下(xia)(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)的(de)(de)(de)電(dian)(dian)(dian)極(ji)(ji)引出(chu)片(pian)(pian)3；所述下(xia)(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)上(shang)的(de)(de)(de)兩(liang)(liang)條印刷電(dian)(dian)(dian)極(ji)(ji)6從連(lian)(lian)接電(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)接片(pian)(pian)9到連(lian)(lian)接電(dian)(dian)(dian)極(ji)(ji)引出(chu)片(pian)(pian)3一段的(de)(de)(de)上(shang)表面設(she)(she)置有電(dian)(dian)(dian)極(ji)(ji)保護膜。

一(yi)種上述柔性(xing)單(dan)點力片式傳感(gan)器的制造方法，其特(te)征在于(yu)，包括如(ru)下(xia)步(bu)驟：

a.先制備(bei)形狀(zhuang)大(da)小(xiao)相同的(de)(de)上基(ji)(ji)板(ban)和(he)下(xia)基(ji)(ji)板(ban)，在上基(ji)(ji)板(ban)長度方向的(de)(de)一(yi)側設置一(yi)凸(tu)起；在相對(dui)該凸(tu)起的(de)(de)下(xia)基(ji)(ji)板(ban)上設置一(yi)凹陷；

b.將下(xia)基(ji)板1固(gu)定在絲網(wang)印刷(shua)機(ji)的(de)印刷(shua)臺(tai)上，用導電料漿沿(yan)下(xia)基(ji)板長(chang)度(du)方向從(cong)遠(yuan)離凹(ao)陷(xian)一側到凹(ao)陷(xian)的(de)上表面印制兩條(tiao)印刷(shua)電極(ji)(ji)，干燥后，在下(xia)基(ji)板遠(yuan)離凹(ao)陷(xian)的(de)一側設置兩個外露的(de)電極(ji)(ji)引(yin)出片3。

c.在下(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)凹陷中(zhong)涂(tu)敷壓敏(min)電(dian)(dian)阻油墨，并放置一(yi)個壓敏(min)體，該壓敏(min)體上、下(xia)(xia)(xia)端(duan)面(mian)事先分別焊接好兩個電(dian)(dian)極連(lian)接片9，位于壓敏(min)體上、下(xia)(xia)(xia)端(duan)面(mian)的(de)(de)兩電(dian)(dian)極連(lian)接片9分別連(lian)接至位于下(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)上的(de)(de)兩條印(yin)刷(shua)電(dian)(dian)極6的(de)(de)一(yi)端(duan)，兩條印(yin)刷(shua)電(dian)(dian)極6的(de)(de)另一(yi)端(duan)連(lian)接外露(lu)的(de)(de)兩個電(dian)(dian)極引(yin)出(chu)片3；同時，在上基(ji)(ji)板(ban)(ban)4的(de)(de)凸起(qi)內表面(mian)上涂(tu)敷壓敏(min)電(dian)(dian)阻油墨。

d.在下基板的(de)(de)兩(liang)條印刷電(dian)(dian)極(ji)6上從(cong)連接電(dian)(dian)極(ji)連接片9到連接電(dian)(dian)極(ji)引出片3的(de)(de)一段上表面涂(tu)敷(fu)一層電(dian)(dian)極(ji)保(bao)護膜并干燥。

e.將上(shang)、下(xia)基板用粘接(jie)層復合(he)，使所述凸(tu)起與凹陷之間形成一個的密閉壓敏(min)體室，將壓敏(min)體及電極連接(jie)片(pian)封裝在其內，壓敏(min)體室的大(da)小剛好與壓敏(min)體的大(da)小吻(wen)合(he)，同時兩條印刷(shua)電極相互平行(xing)。

以上方法中，所述的印刷電(dian)極用(yong)(yong)導電(dian)漿(jiang)料(liao)為銀導電(dian)漿(jiang)料(liao)；所述的電(dian)極保(bao)護膜材(cai)料(liao)采(cai)用(yong)(yong)羥乙基(ji)纖維素；所述的壓敏電(dian)阻油墨采(cai)用(yong)(yong)碳二硫(liu)化鉬(mu)油墨；所述的上、下基(ji)板采(cai)用(yong)(yong)聚氯乙烯材(cai)料(liao)制成矩形基(ji)片；所述的粘接層采(cai)用(yong)(yong)環氧樹脂(zhi)。

本發(fa)明(ming)的(de)(de)(de)柔性單(dan)點力片式傳(chuan)(chuan)感器不需要外加保(bao)(bao)護(hu)(hu)(hu)裝置(zhi)，不用將壓敏(min)電(dian)阻(zu)直接置(zhi)入被測對(dui)象內部(bu)(bu)，只(zhi)(zhi)需將被測對(dui)象的(de)(de)(de)點接觸部(bu)(bu)位與壓敏(min)電(dian)阻(zu)所(suo)對(dui)應的(de)(de)(de)壓敏(min)體室(shi)的(de)(de)(de)聚氯乙烯PVC絕(jue)緣基(ji)片直接接觸即可；同時壓敏(min)電(dian)阻(zu)材料在(zai)工作過程中(zhong)始終(zhong)受到了聚氯乙烯PVC片的(de)(de)(de)絕(jue)緣保(bao)(bao)護(hu)(hu)(hu)。由(you)于兩條銀導電(dian)電(dian)極均處于羥乙基(ji)纖維素HEC的(de)(de)(de)絕(jue)緣保(bao)(bao)護(hu)(hu)(hu)下，可有(you)效防止兩電(dian)極間間距(ju)太小(xiao)而引起的(de)(de)(de)電(dian)子遷移(yi)所(suo)造成的(de)(de)(de)電(dian)極間短路(lu)現象。該柔性單(dan)點力片式傳(chuan)(chuan)感器只(zhi)(zhi)有(you)電(dian)極引出片部(bu)(bu)分區域外露，因此(ci)具有(you)抗強干(gan)擾的(de)(de)(de)優(you)點。

本(ben)發明采用(yong)基于絲網印(yin)刷工(gong)藝的(de)(de)(de)制造(zao)方法，使(shi)制得的(de)(de)(de)單(dan)點力(li)傳感器具有重量(liang)輕、體(ti)積小(片狀)、成(cheng)本(ben)低、制作(zuo)簡單(dan)、可(ke)(ke)(ke)批量(liang)化生(sheng)產(chan)的(de)(de)(de)特(te)(te)點，并(bing)可(ke)(ke)(ke)重復使(shi)用(yong)、操(cao)作(zuo)便捷。該傳感器可(ke)(ke)(ke)應用(yong)于工(gong)作(zuo)空間(jian)狹小的(de)(de)(de)某一點接(jie)觸物體(ti)間(jian)的(de)(de)(de)壓力(li)或集中力(li)的(de)(de)(de)檢(jian)測以及類似特(te)(te)殊(shu)應用(yong)場合。

附圖說明

圖(tu)1為本發明柔性單點力片(pian)式傳感器結(jie)構示意圖(tu)。圖(tu)中：1、下基板(ban)；2、粘接層；3、電(dian)極(ji)引出片(pian)；4、上基板(ban)；5、電(dian)極(ji)保護膜；6、印刷電(dian)極(ji)；7、壓(ya)敏體(ti)。

圖2為(wei)圖1的俯視其及(ji)印(yin)刷電(dian)極的局(ju)部剖視圖。圖中：8、上基板凸(tu)起；9、電(dian)極連接片。

圖(tu)3為圖(tu)2的剖面(mian)圖(tu)。圖(tu)中(zhong)：10、下基板凹陷(xian)。

圖4為本發明柔性(xing)單(dan)點力片式傳感器一個應用實例的測量(liang)電路原理(li)圖。

具(ju)體(ti)實施方式

下面結合附圖及實施例對(dui)本發明作進一步(bu)的詳細說明。

如圖1-圖3所示，一(yi)(yi)(yi)(yi)種柔性單點力片(pian)(pian)式(shi)傳感器，包括(kuo)上(shang)基(ji)(ji)(ji)板(ban)(ban)(ban)(ban)4和(he)下(xia)(xia)(xia)基(ji)(ji)(ji)板(ban)(ban)(ban)(ban)1、壓(ya)(ya)(ya)敏(min)體7、設置(zhi)(zhi)在壓(ya)(ya)(ya)敏(min)體7垂(chui)直兩(liang)端面的(de)(de)兩(liang)個電(dian)(dian)(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)(jie)片(pian)(pian)9，上(shang)、下(xia)(xia)(xia)基(ji)(ji)(ji)板(ban)(ban)(ban)(ban)之間(jian)由環氧樹(shu)脂粘接(jie)(jie)層2封接(jie)(jie)；上(shang)、下(xia)(xia)(xia)基(ji)(ji)(ji)板(ban)(ban)(ban)(ban)4、1可由聚氯乙烯(PVC)制成(cheng)(cheng)相同大(da)小(xiao)尺寸的(de)(de)矩(ju)形(xing)基(ji)(ji)(ji)片(pian)(pian)；在靠近上(shang)基(ji)(ji)(ji)板(ban)(ban)(ban)(ban)4長(chang)度方向的(de)(de)左側(ce)設置(zhi)(zhi)有一(yi)(yi)(yi)(yi)凸(tu)(tu)起8；在相對該(gai)凸(tu)(tu)起8的(de)(de)下(xia)(xia)(xia)基(ji)(ji)(ji)板(ban)(ban)(ban)(ban)上(shang)設置(zhi)(zhi)有一(yi)(yi)(yi)(yi)凹(ao)陷10，該(gai)凹(ao)陷與凸(tu)(tu)起之間(jian)形(xing)成(cheng)(cheng)一(yi)(yi)(yi)(yi)個的(de)(de)密閉壓(ya)(ya)(ya)敏(min)體室(shi)，其中(zhong)封裝有壓(ya)(ya)(ya)敏(min)體7及電(dian)(dian)(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)(jie)片(pian)(pian)9，壓(ya)(ya)(ya)敏(min)體室(shi)的(de)(de)大(da)小(xiao)剛(gang)好與壓(ya)(ya)(ya)敏(min)體7的(de)(de)大(da)小(xiao)吻合，壓(ya)(ya)(ya)敏(min)體7為(wei)(wei)圓片(pian)(pian)或方塊形(xing)壓(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)阻；下(xia)(xia)(xia)基(ji)(ji)(ji)板(ban)(ban)(ban)(ban)1上(shang)設置(zhi)(zhi)有兩(liang)條沿其長(chang)度方向相互平行的(de)(de)印(yin)刷電(dian)(dian)(dian)(dian)極(ji)6，印(yin)刷電(dian)(dian)(dian)(dian)極(ji)6為(wei)(wei)銀導(dao)電(dian)(dian)(dian)(dian)帶(dai)狀薄膜。每條印(yin)刷電(dian)(dian)(dian)(dian)極(ji)在凹(ao)陷右(you)(you)邊沿處的(de)(de)一(yi)(yi)(yi)(yi)端連(lian)(lian)(lian)接(jie)(jie)一(yi)(yi)(yi)(yi)個電(dian)(dian)(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)(jie)片(pian)(pian)9；遠離(li)凹(ao)陷到下(xia)(xia)(xia)基(ji)(ji)(ji)板(ban)(ban)(ban)(ban)1右(you)(you)側(ce)處的(de)(de)另一(yi)(yi)(yi)(yi)端連(lian)(lian)(lian)接(jie)(jie)一(yi)(yi)(yi)(yi)個電(dian)(dian)(dian)(dian)極(ji)引(yin)(yin)出(chu)片(pian)(pian)3，該(gai)電(dian)(dian)(dian)(dian)極(ji)引(yin)(yin)出(chu)片(pian)(pian)3外(wai)露下(xia)(xia)(xia)基(ji)(ji)(ji)板(ban)(ban)(ban)(ban)右(you)(you)側(ce)；印(yin)刷電(dian)(dian)(dian)(dian)極(ji)6從連(lian)(lian)(lian)接(jie)(jie)電(dian)(dian)(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)(jie)片(pian)(pian)9到連(lian)(lian)(lian)接(jie)(jie)電(dian)(dian)(dian)(dian)極(ji)引(yin)(yin)出(chu)片(pian)(pian)3的(de)(de)一(yi)(yi)(yi)(yi)段上(shang)表(biao)面設置(zhi)(zhi)有電(dian)(dian)(dian)(dian)極(ji)保護膜5，該(gai)電(dian)(dian)(dian)(dian)極(ji)保護膜為(wei)(wei)羥乙基(ji)(ji)(ji)纖維素(HEC)膜層。

以上(shang)柔(rou)性單點力(li)片式傳感器制(zhi)造方法，包括(kuo)下述(shu)步(bu)驟：

a.先制備形狀(zhuang)大小相同的上(shang)基(ji)板(ban)(ban)和(he)下基(ji)板(ban)(ban)，在(zai)上(shang)基(ji)板(ban)(ban)長(chang)度方向的一側設置(zhi)一凸起；在(zai)相對該凸起的下基(ji)板(ban)(ban)上(shang)設置(zhi)一凹陷；

b.將(jiang)下基板(ban)1固(gu)定(ding)在絲網(wang)印(yin)刷機(ji)的(de)(de)印(yin)刷臺上，用導電料漿沿下基板(ban)長度方向從遠離凹陷一側(ce)到凹陷的(de)(de)上表面印(yin)制(zhi)兩條印(yin)刷電極，干(gan)燥后，在下基板(ban)遠離凹陷的(de)(de)一側(ce)設置兩個外露的(de)(de)電極引(yin)出片3。

c.在下基(ji)板凹陷中涂敷(fu)壓(ya)敏(min)(min)電(dian)阻油墨(mo)，并放置(zhi)一(yi)個壓(ya)敏(min)(min)體(ti)，該壓(ya)敏(min)(min)體(ti)上(shang)(shang)、下端(duan)面事先分別(bie)焊接(jie)好兩個電(dian)極(ji)連(lian)接(jie)片9，位于壓(ya)敏(min)(min)體(ti)上(shang)(shang)、下端(duan)面的(de)兩電(dian)極(ji)連(lian)接(jie)片9分別(bie)連(lian)接(jie)至位于下基(ji)板上(shang)(shang)的(de)兩條(tiao)印刷(shua)電(dian)極(ji)6，兩條(tiao)印刷(shua)電(dian)極(ji)6的(de)另(ling)一(yi)端(duan)連(lian)接(jie)外露的(de)兩個電(dian)極(ji)引出片3；同時，在上(shang)(shang)基(ji)板4的(de)凸起內表面上(shang)(shang)涂敷(fu)壓(ya)敏(min)(min)電(dian)阻油墨(mo)。

d.在下基板的(de)兩(liang)條印刷電(dian)(dian)(dian)極(ji)6上從連接電(dian)(dian)(dian)極(ji)連接片9到(dao)連接電(dian)(dian)(dian)極(ji)引出片3的(de)一段(duan)上表(biao)面涂敷一層電(dian)(dian)(dian)極(ji)保(bao)護膜并(bing)干燥。

e.將上、下基板用粘接(jie)層(ceng)復合，使所述凸起與凹(ao)陷之(zhi)間形成(cheng)一個的(de)密閉壓敏(min)(min)體(ti)室，將壓敏(min)(min)體(ti)及電極連接(jie)片(pian)封(feng)裝在其內，壓敏(min)(min)體(ti)室的(de)大(da)小剛好與壓敏(min)(min)體(ti)的(de)大(da)小吻合，同(tong)時兩條印刷(shua)電極相互平行。

當上(shang)述絲網印(yin)刷單點力片(pian)式傳感器與外(wai)接(jie)電(dian)路連接(jie)并通過能(neng)正常(chang)工作(zuo)的測試后，該(gai)傳感器外(wai)露(lu)部分(fen)電(dian)極(ji)引出片(pian)3與外(wai)接(jie)導線連接(jie)部分(fen)用絕(jue)緣硅(gui)膠將其覆蓋以防銀電(dian)極(ji)長(chang)期處于在空氣中被氧化而削弱或喪(sang)失了其導電(dian)性能(neng)。

本發明(ming)柔性單點力片式(shi)傳(chuan)感(gan)器(qi)的(de)(de)(de)檢(jian)測原理如(ru)下：當處于點接觸(chu)(chu)狀態(tai)時物體間的(de)(de)(de)一集(ji)(ji)(ji)中載荷(集(ji)(ji)(ji)中力)作用于壓(ya)(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)7上(shang)時，壓(ya)(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)因受到了壓(ya)(ya)(ya)(ya)力作用便(bian)發生了一定的(de)(de)(de)壓(ya)(ya)(ya)(ya)縮(suo)變(bian)形，從而引起了壓(ya)(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)值(zhi)的(de)(de)(de)變(bian)化，反(fan)映(ying)在電(dian)(dian)(dian)(dian)(dian)(dian)路上(shang)便(bian)是兩銀導(dao)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)6之間電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)的(de)(de)(de)改變(bian)；根據壓(ya)(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)上(shang)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)相對于最初電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)的(de)(de)(de)變(bian)化量(liang)便(bian)可反(fan)映(ying)出(chu)點接觸(chu)(chu)處壓(ya)(ya)(ya)(ya)力或集(ji)(ji)(ji)中載荷的(de)(de)(de)大小。集(ji)(ji)(ji)中載荷與(yu)軸(zhou)向長度、電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)阻(zu)(zu)值(zhi)與(yu)軸(zhou)向長度的(de)(de)(de)關系(xi)、電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)與(yu)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)的(de)(de)(de)關系(xi)如(ru)下：

ΔL=FLES---(1)

其中：L——壓敏電阻(zu)的原始厚度；

S——壓敏(min)電阻的橫(heng)截面面積；

F——作用于壓敏電阻(zu)上(shang)的集(ji)中載荷；

E——壓敏(min)電阻的彈性(xing)模量；

ΔL——壓敏電阻油墨(mo)厚度的改變量。

R=ρLS---(2)

其中：L——壓敏電(dian)阻油墨的厚度；

S——壓(ya)敏電阻油墨的橫截面面積；

ρ——壓敏電(dian)阻(zu)油墨的(de)電(dian)阻(zu)率；

R——壓(ya)敏電阻油墨的電阻值。

                U＝IR        (3)

其中：I——流經壓敏電阻的電流值(zhi)；

R——壓敏電阻油墨的電阻值(zhi)；

U——壓敏電阻(zu)油墨的(de)電壓值(zhi)；

如圖4所示(shi)，絲網印刷單點力(li)片式傳(chuan)(chuan)感(gan)(gan)器的(de)(de)(de)(de)(de)壓(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)因(yin)(yin)(yin)為(wei)只受到(dao)軸(zhou)向壓(ya)(ya)縮變(bian)形而引(yin)起(qi)(qi)了(le)(le)(le)(le)其(qi)阻(zu)值的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)，因(yin)(yin)(yin)此在測(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)壓(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)可(ke)(ke)(ke)以被當(dang)作(zuo)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)的(de)(de)(de)(de)(de)可(ke)(ke)(ke)變(bian)電(dian)(dian)(dian)(dian)(dian)阻(zu)對待；同(tong)時(shi)(shi)又由(you)于壓(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)引(yin)起(qi)(qi)了(le)(le)(le)(le)加(jia)在壓(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)兩端(duan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)值的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)，因(yin)(yin)(yin)此壓(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)端(duan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)可(ke)(ke)(ke)以被當(dang)作(zuo)檢測(ce)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)(de)(de)輸入變(bian)量(liang)信(xin)(xin)(xin)(xin)(xin)號(hao)。由(you)于單點力(li)傳(chuan)(chuan)感(gan)(gan)器的(de)(de)(de)(de)(de)壓(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)因(yin)(yin)(yin)外(wai)力(li)作(zuo)用(yong)而引(yin)起(qi)(qi)了(le)(le)(le)(le)加(jia)在其(qi)兩端(duan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)，反相(xiang)(xiang)比(bi)(bi)(bi)例(li)(li)(li)放大(da)(da)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)(de)(de)輸入端(duan)恰(qia)好(hao)是(shi)(shi)壓(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)端(duan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)端(duan)；因(yin)(yin)(yin)此壓(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)端(duan)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)必然引(yin)起(qi)(qi)了(le)(le)(le)(le)反相(xiang)(xiang)比(bi)(bi)(bi)例(li)(li)(li)放大(da)(da)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)I輸出(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)值的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)，也(ye)就(jiu)是(shi)(shi)說單點力(li)傳(chuan)(chuan)感(gan)(gan)器受外(wai)力(li)作(zuo)用(yong)是(shi)(shi)可(ke)(ke)(ke)以引(yin)起(qi)(qi)測(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)相(xiang)(xiang)應電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)的(de)(de)(de)(de)(de)。當(dang)外(wai)力(li)作(zuo)用(yong)于單點力(li)傳(chuan)(chuan)感(gan)(gan)器后(hou)(hou)由(you)于壓(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)值的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)而產生了(le)(le)(le)(le)一定的(de)(de)(de)(de)(de)微弱電(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)(xin)號(hao)，通(tong)過反相(xiang)(xiang)比(bi)(bi)(bi)例(li)(li)(li)放大(da)(da)器I將(jiang)該信(xin)(xin)(xin)(xin)(xin)號(hao)放大(da)(da)；然后(hou)(hou)再通(tong)過低通(tong)濾波器將(jiang)其(qi)他高頻干擾信(xin)(xin)(xin)(xin)(xin)號(hao)過濾或(huo)者去(qu)除；接著再通(tong)過反相(xiang)(xiang)比(bi)(bi)(bi)例(li)(li)(li)放大(da)(da)器II將(jiang)電(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)(xin)號(hao)還原(yuan)到(dao)最初(chu)的(de)(de)(de)(de)(de)相(xiang)(xiang)位(因(yin)(yin)(yin)為(wei)前后(hou)(hou)經(jing)(jing)過了(le)(le)(le)(le)兩次反相(xiang)(xiang)放大(da)(da)，因(yin)(yin)(yin)此經(jing)(jing)過處(chu)理(li)(li)后(hou)(hou)的(de)(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)可(ke)(ke)(ke)以恢復(fu)到(dao)原(yuan)來的(de)(de)(de)(de)(de)正電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)值，同(tong)時(shi)(shi)將(jiang)微弱電(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)(xin)號(hao)值放大(da)(da)了(le)(le)(le)(le))；最后(hou)(hou)再通(tong)過A/D轉換(huan)器限壓(ya)(ya)轉換(huan)將(jiang)外(wai)力(li)引(yin)起(qi)(qi)的(de)(de)(de)(de)(de)并經(jing)(jing)過處(chu)理(li)(li)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)(xin)號(hao)轉換(huan)為(wei)計算(suan)機能(neng)識別的(de)(de)(de)(de)(de)數(shu)字電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)信(xin)(xin)(xin)(xin)(xin)號(hao)，當(dang)然也(ye)可(ke)(ke)(ke)以直接將(jiang)反相(xiang)(xiang)比(bi)(bi)(bi)例(li)(li)(li)放大(da)(da)器II處(chu)理(li)(li)后(hou)(hou)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)信(xin)(xin)(xin)(xin)(xin)號(hao)直接輸入至可(ke)(ke)(ke)以接收該信(xin)(xin)(xin)(xin)(xin)號(hao)的(de)(de)(de)(de)(de)模(mo)擬(ni)(ni)顯示(shi)儀器或(huo)處(chu)理(li)(li)儀器例(li)(li)(li)如模(mo)擬(ni)(ni)信(xin)(xin)(xin)(xin)(xin)號(hao)示(shi)波顯示(shi)器或(huo)者模(mo)擬(ni)(ni)信(xin)(xin)(xin)(xin)(xin)號(hao)處(chu)理(li)(li)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)板。