技術領域

本發(fa)明涉及(ji)一(yi)種傳感(gan)器及(ji)其(qi)制造(zao)方(fang)法，特別(bie)涉及(ji)一(yi)種用于在某一(yi)狹小接(jie)觸區(qu)域中(zhong)對(dui)一(yi)點接(jie)觸物體(ti)間的壓力(li)(li)或集中(zhong)力(li)(li)進(jin)行檢測的柔性(xing)單點力(li)(li)片式傳感(gan)器及(ji)其(qi)制造(zao)方(fang)法。

背景技術

壓力(li)(li)傳(chuan)感(gan)器(qi)及檢(jian)測技(ji)術在(zai)航空航天、軍事(shi)工業、汽車、船(chuan)舶制造、工業自(zi)動化、醫(yi)學研究、生物(wu)醫(yi)療等(deng)領域中(zhong)(zhong)發揮著重要(yao)的(de)(de)(de)作用(yong)。然而在(zai)上述應用(yong)領域，許多場合需在(zai)某(mou)一(yi)(yi)狹小空間(jian)中(zhong)(zhong)對某(mou)一(yi)(yi)點(dian)(dian)接觸(chu)(chu)物(wu)體間(jian)的(de)(de)(de)壓力(li)(li)或集(ji)中(zhong)(zhong)力(li)(li)進行檢(jian)測，例(li)如(ru)點(dian)(dian)接觸(chu)(chu)物(wu)體間(jian)在(zai)運(yun)動過(guo)程(cheng)中(zhong)(zhong)摩(mo)擦力(li)(li)相互(hu)(hu)作用(yong)過(guo)程(cheng)的(de)(de)(de)研究、例(li)如(ru)檢(jian)測空間(jian)凸輪與滾子從動件處(chu)于點(dian)(dian)接觸(chu)(chu)狀態下的(de)(de)(de)相互(hu)(hu)作用(yong)力(li)(li)、檢(jian)測某(mou)一(yi)(yi)對牙齒(chi)嚙合時的(de)(de)(de)相互(hu)(hu)作用(yong)力(li)(li)等(deng)。由(you)于受到傳(chuan)感(gan)器(qi)重量、體積(ji)以(yi)及工作空間(jian)(如(ru)狹縫)的(de)(de)(de)限制，這時傳(chuan)統壓力(li)(li)傳(chuan)感(gan)器(qi)便不能(neng)用(yong)于上述場合下的(de)(de)(de)使用(yong)來(lai)檢(jian)測某(mou)一(yi)(yi)點(dian)(dian)接觸(chu)(chu)物(wu)體間(jian)的(de)(de)(de)壓力(li)(li)或集(ji)中(zhong)(zhong)力(li)(li)。即便勉強使用(yong)，也(ye)不能(neng)滿足(zu)操作便捷的(de)(de)(de)要(yao)求，

發明內容

本發明針對傳統壓(ya)力傳感器(qi)不能對某一(yi)點接觸(chu)物體(ti)(ti)間壓(ya)力進行檢(jian)(jian)測、體(ti)(ti)積(ji)大、重量(liang)重、操(cao)作(zuo)不方便(bian)的缺點；提供(gong)了(le)一(yi)種能夠檢(jian)(jian)測出某一(yi)點接觸(chu)物體(ti)(ti)間壓(ya)力的柔性單(dan)點力片式傳感器(qi)，該傳感器(qi)具(ju)有體(ti)(ti)積(ji)小、重量(liang)輕、制作(zuo)簡單(dan)、可低成本批量(liang)化(hua)生產的特點，并且可重復使(shi)用(yong)、操(cao)作(zuo)簡便(bian)。

本發明的另一個目(mu)的是提(ti)供一種該傳感器的制(zhi)造方法。

為達到上述(shu)目的，本發明是采(cai)取如下技術方案予以(yi)實現的：

一(yi)(yi)種(zhong)柔性單點力片(pian)(pian)式傳感器，包(bao)括(kuo)壓(ya)敏(min)(min)體(ti)(ti)(ti)(ti)、分別(bie)設(she)置(zhi)在壓(ya)敏(min)(min)體(ti)(ti)(ti)(ti)上(shang)(shang)下(xia)(xia)(xia)端(duan)面的(de)(de)(de)兩(liang)個電(dian)(dian)極(ji)連(lian)接(jie)(jie)(jie)片(pian)(pian)，其特征在于，還包(bao)括(kuo)有(you)(you)(you)形狀(zhuang)大(da)小(xiao)相(xiang)(xiang)同(tong)的(de)(de)(de)上(shang)(shang)基(ji)(ji)板(ban)(ban)和下(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)，上(shang)(shang)、下(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)之間(jian)由粘接(jie)(jie)(jie)層封(feng)接(jie)(jie)(jie)；在上(shang)(shang)基(ji)(ji)板(ban)(ban)長(chang)度方向的(de)(de)(de)一(yi)(yi)側(ce)設(she)置(zhi)有(you)(you)(you)一(yi)(yi)凸起；在相(xiang)(xiang)對該凸起的(de)(de)(de)下(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)上(shang)(shang)設(she)置(zhi)有(you)(you)(you)一(yi)(yi)凹陷(xian)，該凹陷(xian)與(yu)(yu)所述(shu)凸起之間(jian)形成一(yi)(yi)個密閉的(de)(de)(de)壓(ya)敏(min)(min)體(ti)(ti)(ti)(ti)室(shi)，其中封(feng)裝有(you)(you)(you)所述(shu)的(de)(de)(de)壓(ya)敏(min)(min)體(ti)(ti)(ti)(ti)及電(dian)(dian)極(ji)連(lian)接(jie)(jie)(jie)片(pian)(pian)，所述(shu)壓(ya)敏(min)(min)體(ti)(ti)(ti)(ti)室(shi)的(de)(de)(de)大(da)小(xiao)剛好與(yu)(yu)壓(ya)敏(min)(min)體(ti)(ti)(ti)(ti)的(de)(de)(de)大(da)小(xiao)吻合；所述(shu)下(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)1沿(yan)其長(chang)度方向設(she)置(zhi)有(you)(you)(you)兩(liang)條相(xiang)(xiang)互(hu)平行的(de)(de)(de)印刷電(dian)(dian)極(ji)6，每個印刷電(dian)(dian)極(ji)分別(bie)連(lian)接(jie)(jie)(jie)位于壓(ya)敏(min)(min)體(ti)(ti)(ti)(ti)上(shang)(shang)或下(xia)(xia)(xia)端(duan)面的(de)(de)(de)電(dian)(dian)極(ji)連(lian)接(jie)(jie)(jie)片(pian)(pian)9和伸出(chu)下(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)的(de)(de)(de)電(dian)(dian)極(ji)引出(chu)片(pian)(pian)3；所述(shu)下(xia)(xia)(xia)基(ji)(ji)板(ban)(ban)上(shang)(shang)的(de)(de)(de)兩(liang)條印刷電(dian)(dian)極(ji)6從連(lian)接(jie)(jie)(jie)電(dian)(dian)極(ji)連(lian)接(jie)(jie)(jie)片(pian)(pian)9到連(lian)接(jie)(jie)(jie)電(dian)(dian)極(ji)引出(chu)片(pian)(pian)3一(yi)(yi)段的(de)(de)(de)上(shang)(shang)表面設(she)置(zhi)有(you)(you)(you)電(dian)(dian)極(ji)保護膜。

一種上述(shu)柔(rou)性單點(dian)力片式(shi)傳感器的制(zhi)造方法，其特征(zheng)在于，包括如(ru)下步驟(zou)：

a.先制備(bei)形(xing)狀大小(xiao)相(xiang)同的(de)上(shang)基(ji)板(ban)和下(xia)基(ji)板(ban)，在(zai)上(shang)基(ji)板(ban)長度方向(xiang)的(de)一側設置一凸起；在(zai)相(xiang)對該(gai)凸起的(de)下(xia)基(ji)板(ban)上(shang)設置一凹陷；

b.將(jiang)下基板(ban)1固定在(zai)絲網印(yin)刷(shua)(shua)機的(de)印(yin)刷(shua)(shua)臺上，用(yong)導電料漿(jiang)沿下基板(ban)長度(du)方向(xiang)從遠離凹(ao)陷一(yi)側到凹(ao)陷的(de)上表面印(yin)制兩條(tiao)印(yin)刷(shua)(shua)電極，干燥后，在(zai)下基板(ban)遠離凹(ao)陷的(de)一(yi)側設(she)置兩個(ge)外露的(de)電極引出片3。

c.在(zai)下基板(ban)凹陷中(zhong)涂(tu)敷壓敏(min)(min)電(dian)(dian)阻(zu)(zu)油墨，并放置一個壓敏(min)(min)體(ti)，該壓敏(min)(min)體(ti)上(shang)(shang)、下端面事先分(fen)別焊接好兩(liang)(liang)個電(dian)(dian)極(ji)連接片9，位于壓敏(min)(min)體(ti)上(shang)(shang)、下端面的(de)(de)兩(liang)(liang)電(dian)(dian)極(ji)連接片9分(fen)別連接至位于下基板(ban)上(shang)(shang)的(de)(de)兩(liang)(liang)條印刷(shua)電(dian)(dian)極(ji)6的(de)(de)一端，兩(liang)(liang)條印刷(shua)電(dian)(dian)極(ji)6的(de)(de)另一端連接外(wai)露(lu)的(de)(de)兩(liang)(liang)個電(dian)(dian)極(ji)引(yin)出片3；同時(shi)，在(zai)上(shang)(shang)基板(ban)4的(de)(de)凸起內表面上(shang)(shang)涂(tu)敷壓敏(min)(min)電(dian)(dian)阻(zu)(zu)油墨。

d.在下基(ji)板的兩條印刷電(dian)極(ji)6上(shang)從(cong)連接電(dian)極(ji)連接片9到連接電(dian)極(ji)引出片3的一(yi)段上(shang)表面涂敷一(yi)層電(dian)極(ji)保護(hu)膜(mo)并(bing)干燥。

e.將(jiang)上、下基板用粘接(jie)層復(fu)合(he)，使所(suo)述凸(tu)起與凹陷之(zhi)間形成一(yi)個的密閉壓(ya)(ya)敏(min)體(ti)室，將(jiang)壓(ya)(ya)敏(min)體(ti)及電(dian)極(ji)連接(jie)片封裝在(zai)其(qi)內，壓(ya)(ya)敏(min)體(ti)室的大小(xiao)剛好與壓(ya)(ya)敏(min)體(ti)的大小(xiao)吻合(he)，同時(shi)兩條(tiao)印刷(shua)電(dian)極(ji)相互平(ping)行。

以上方(fang)法中，所(suo)(suo)述(shu)的(de)(de)印刷(shua)電(dian)極(ji)用(yong)導(dao)電(dian)漿料(liao)為銀導(dao)電(dian)漿料(liao)；所(suo)(suo)述(shu)的(de)(de)電(dian)極(ji)保護膜(mo)材料(liao)采用(yong)羥乙(yi)基纖維素(su)；所(suo)(suo)述(shu)的(de)(de)壓敏電(dian)阻油(you)墨采用(yong)碳二硫化(hua)鉬油(you)墨；所(suo)(suo)述(shu)的(de)(de)上、下基板(ban)采用(yong)聚氯乙(yi)烯材料(liao)制(zhi)成矩形基片；所(suo)(suo)述(shu)的(de)(de)粘接(jie)層(ceng)采用(yong)環(huan)氧樹脂。

本發明的柔性(xing)單(dan)點(dian)(dian)力片(pian)(pian)式(shi)傳(chuan)感器不需要外(wai)加(jia)保(bao)護(hu)裝(zhuang)置(zhi)，不用將壓(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)直接(jie)置(zhi)入被測(ce)對象內部，只需將被測(ce)對象的點(dian)(dian)接(jie)觸(chu)部位與壓(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)所對應的壓(ya)敏(min)體室(shi)的聚氯乙烯(xi)PVC絕緣基片(pian)(pian)直接(jie)接(jie)觸(chu)即可；同時壓(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)材料在工(gong)作過程中始終受到了聚氯乙烯(xi)PVC片(pian)(pian)的絕緣保(bao)護(hu)。由于兩條銀(yin)導電(dian)(dian)(dian)電(dian)(dian)(dian)極(ji)均處于羥(qian)乙基纖維素HEC的絕緣保(bao)護(hu)下(xia)，可有效(xiao)防止兩電(dian)(dian)(dian)極(ji)間(jian)間(jian)距太小而(er)引起的電(dian)(dian)(dian)子(zi)遷移(yi)所造成的電(dian)(dian)(dian)極(ji)間(jian)短(duan)路現象。該柔性(xing)單(dan)點(dian)(dian)力片(pian)(pian)式(shi)傳(chuan)感器只有電(dian)(dian)(dian)極(ji)引出片(pian)(pian)部分(fen)區域外(wai)露，因(yin)此(ci)具有抗強干(gan)擾的優點(dian)(dian)。

本(ben)發明(ming)采(cai)用(yong)(yong)(yong)基于(yu)絲網(wang)印刷工藝的(de)制(zhi)造方法，使制(zhi)得的(de)單點(dian)(dian)力傳(chuan)感(gan)器具有重量(liang)輕、體積(ji)小(片狀)、成本(ben)低、制(zhi)作(zuo)簡單、可批量(liang)化生(sheng)產的(de)特(te)點(dian)(dian)，并可重復(fu)使用(yong)(yong)(yong)、操作(zuo)便捷。該傳(chuan)感(gan)器可應(ying)用(yong)(yong)(yong)于(yu)工作(zuo)空間狹小的(de)某一點(dian)(dian)接觸(chu)物體間的(de)壓(ya)力或(huo)集中力的(de)檢(jian)測以及類似特(te)殊應(ying)用(yong)(yong)(yong)場合。

附圖說明

圖(tu)(tu)1為本發明(ming)柔性單點力片式傳感器結構示(shi)意圖(tu)(tu)。圖(tu)(tu)中：1、下(xia)基(ji)板；2、粘接層；3、電極引出(chu)片；4、上(shang)基(ji)板；5、電極保護膜；6、印刷(shua)電極；7、壓敏(min)體。

圖(tu)(tu)(tu)2為圖(tu)(tu)(tu)1的俯視(shi)其及印刷電極的局部剖視(shi)圖(tu)(tu)(tu)。圖(tu)(tu)(tu)中：8、上基板凸起(qi)；9、電極連接片。

圖3為(wei)圖2的剖面圖。圖中：10、下基(ji)板凹陷。

圖4為本發明柔性單點力片(pian)式傳感(gan)器一個應用實例的測量電(dian)路原(yuan)理圖。

具體(ti)實施方(fang)式

下面結(jie)合附圖及實施例對本發明作(zuo)進一步的詳細(xi)說明。

如圖(tu)1-圖(tu)3所示，一(yi)種柔性單點力片(pian)式傳感器，包括上基(ji)板(ban)(ban)4和下(xia)基(ji)板(ban)(ban)1、壓(ya)(ya)(ya)敏(min)體(ti)7、設(she)(she)置(zhi)(zhi)在(zai)(zai)(zai)壓(ya)(ya)(ya)敏(min)體(ti)7垂直兩端面(mian)的(de)(de)(de)兩個電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)連(lian)(lian)接(jie)(jie)片(pian)9，上、下(xia)基(ji)板(ban)(ban)之(zhi)間(jian)由(you)環(huan)氧樹脂粘接(jie)(jie)層(ceng)2封接(jie)(jie)；上、下(xia)基(ji)板(ban)(ban)4、1可(ke)由(you)聚氯(lv)乙烯(PVC)制成(cheng)(cheng)相(xiang)同大小尺寸的(de)(de)(de)矩形基(ji)片(pian)；在(zai)(zai)(zai)靠近上基(ji)板(ban)(ban)4長(chang)度(du)方(fang)(fang)向的(de)(de)(de)左側(ce)(ce)設(she)(she)置(zhi)(zhi)有一(yi)凸(tu)(tu)起(qi)8；在(zai)(zai)(zai)相(xiang)對該(gai)(gai)(gai)凸(tu)(tu)起(qi)8的(de)(de)(de)下(xia)基(ji)板(ban)(ban)上設(she)(she)置(zhi)(zhi)有一(yi)凹(ao)陷(xian)(xian)10，該(gai)(gai)(gai)凹(ao)陷(xian)(xian)與(yu)凸(tu)(tu)起(qi)之(zhi)間(jian)形成(cheng)(cheng)一(yi)個的(de)(de)(de)密閉壓(ya)(ya)(ya)敏(min)體(ti)室(shi)，其中封裝有壓(ya)(ya)(ya)敏(min)體(ti)7及電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)連(lian)(lian)接(jie)(jie)片(pian)9，壓(ya)(ya)(ya)敏(min)體(ti)室(shi)的(de)(de)(de)大小剛好與(yu)壓(ya)(ya)(ya)敏(min)體(ti)7的(de)(de)(de)大小吻合，壓(ya)(ya)(ya)敏(min)體(ti)7為(wei)圓(yuan)片(pian)或(huo)方(fang)(fang)塊形壓(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻；下(xia)基(ji)板(ban)(ban)1上設(she)(she)置(zhi)(zhi)有兩條沿(yan)(yan)其長(chang)度(du)方(fang)(fang)向相(xiang)互(hu)平行的(de)(de)(de)印(yin)刷電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)6，印(yin)刷電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)6為(wei)銀導(dao)電(dian)(dian)(dian)(dian)(dian)(dian)帶(dai)狀薄膜。每條印(yin)刷電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)在(zai)(zai)(zai)凹(ao)陷(xian)(xian)右(you)(you)邊(bian)沿(yan)(yan)處的(de)(de)(de)一(yi)端連(lian)(lian)接(jie)(jie)一(yi)個電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)連(lian)(lian)接(jie)(jie)片(pian)9；遠離凹(ao)陷(xian)(xian)到(dao)下(xia)基(ji)板(ban)(ban)1右(you)(you)側(ce)(ce)處的(de)(de)(de)另一(yi)端連(lian)(lian)接(jie)(jie)一(yi)個電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)引(yin)(yin)(yin)出(chu)片(pian)3，該(gai)(gai)(gai)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)引(yin)(yin)(yin)出(chu)片(pian)3外(wai)露下(xia)基(ji)板(ban)(ban)右(you)(you)側(ce)(ce)；印(yin)刷電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)6從連(lian)(lian)接(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)連(lian)(lian)接(jie)(jie)片(pian)9到(dao)連(lian)(lian)接(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)引(yin)(yin)(yin)出(chu)片(pian)3的(de)(de)(de)一(yi)段(duan)上表面(mian)設(she)(she)置(zhi)(zhi)有電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)保護膜5，該(gai)(gai)(gai)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)保護膜為(wei)羥乙基(ji)纖(xian)維(wei)素(HEC)膜層(ceng)。

以上柔性單點力片式(shi)傳感器(qi)制(zhi)造方法，包括下述步驟：

a.先制備形狀大小相(xiang)同的(de)上基(ji)(ji)(ji)板(ban)和(he)下基(ji)(ji)(ji)板(ban)，在上基(ji)(ji)(ji)板(ban)長(chang)度方向的(de)一(yi)側設置一(yi)凸(tu)起(qi)；在相(xiang)對(dui)該凸(tu)起(qi)的(de)下基(ji)(ji)(ji)板(ban)上設置一(yi)凹(ao)陷；

b.將下基板(ban)1固定在絲網印刷機的(de)(de)印刷臺(tai)上，用導電料漿沿下基板(ban)長度方向從遠離凹(ao)陷(xian)一側到凹(ao)陷(xian)的(de)(de)上表面印制兩條印刷電極，干燥后，在下基板(ban)遠離凹(ao)陷(xian)的(de)(de)一側設(she)置兩個外露的(de)(de)電極引出片(pian)3。

c.在(zai)(zai)下(xia)基板(ban)凹(ao)陷中涂(tu)敷壓(ya)(ya)敏電(dian)(dian)阻油墨，并放置一個壓(ya)(ya)敏體(ti)，該壓(ya)(ya)敏體(ti)上(shang)、下(xia)端(duan)面事先分別(bie)焊接(jie)好(hao)兩(liang)(liang)個電(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)片(pian)9，位于壓(ya)(ya)敏體(ti)上(shang)、下(xia)端(duan)面的兩(liang)(liang)電(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)片(pian)9分別(bie)連(lian)(lian)(lian)接(jie)至位于下(xia)基板(ban)上(shang)的兩(liang)(liang)條印(yin)刷電(dian)(dian)極(ji)6，兩(liang)(liang)條印(yin)刷電(dian)(dian)極(ji)6的另一端(duan)連(lian)(lian)(lian)接(jie)外(wai)露的兩(liang)(liang)個電(dian)(dian)極(ji)引出片(pian)3；同(tong)時(shi)，在(zai)(zai)上(shang)基板(ban)4的凸(tu)起內(nei)表面上(shang)涂(tu)敷壓(ya)(ya)敏電(dian)(dian)阻油墨。

d.在下基板的兩(liang)條印刷電(dian)極(ji)6上(shang)從連接電(dian)極(ji)連接片9到連接電(dian)極(ji)引出片3的一段(duan)上(shang)表面涂敷一層(ceng)電(dian)極(ji)保護膜并干燥。

e.將(jiang)上、下基板用粘接層復合，使所述凸(tu)起與凹陷之間形成(cheng)一個的(de)(de)(de)密閉(bi)壓敏(min)體(ti)(ti)室，將(jiang)壓敏(min)體(ti)(ti)及(ji)電(dian)極(ji)連接片(pian)封裝在其內，壓敏(min)體(ti)(ti)室的(de)(de)(de)大(da)小(xiao)剛好(hao)與壓敏(min)體(ti)(ti)的(de)(de)(de)大(da)小(xiao)吻合，同時兩條印刷電(dian)極(ji)相(xiang)互平行。

當上述絲網印(yin)刷單點力片(pian)式傳(chuan)感(gan)器(qi)與外(wai)接電(dian)(dian)路(lu)連(lian)接并(bing)通過能(neng)(neng)正常工作的測試后，該傳(chuan)感(gan)器(qi)外(wai)露部分電(dian)(dian)極(ji)引出片(pian)3與外(wai)接導線連(lian)接部分用絕緣硅膠將其(qi)覆蓋以防銀電(dian)(dian)極(ji)長期處于在空(kong)氣中被氧化而削弱或喪(sang)失了(le)其(qi)導電(dian)(dian)性(xing)能(neng)(neng)。

本發(fa)明柔性單點(dian)(dian)力片式傳感器(qi)的(de)(de)檢測原理(li)如下(xia)：當(dang)處于(yu)(yu)點(dian)(dian)接(jie)觸狀態(tai)時物體間的(de)(de)一集中(zhong)(zhong)(zhong)載荷(he)(集中(zhong)(zhong)(zhong)力)作用(yong)于(yu)(yu)壓(ya)(ya)敏電(dian)(dian)阻(zu)(zu)(zu)7上(shang)(shang)時，壓(ya)(ya)敏電(dian)(dian)阻(zu)(zu)(zu)因(yin)受到了(le)壓(ya)(ya)力作用(yong)便(bian)發(fa)生了(le)一定的(de)(de)壓(ya)(ya)縮變(bian)形(xing)，從而(er)引起了(le)壓(ya)(ya)敏電(dian)(dian)阻(zu)(zu)(zu)值的(de)(de)變(bian)化，反映在電(dian)(dian)路上(shang)(shang)便(bian)是兩銀(yin)導電(dian)(dian)電(dian)(dian)極(ji)6之間電(dian)(dian)壓(ya)(ya)值的(de)(de)改(gai)變(bian)；根據壓(ya)(ya)敏電(dian)(dian)阻(zu)(zu)(zu)上(shang)(shang)電(dian)(dian)壓(ya)(ya)值相對于(yu)(yu)最初(chu)電(dian)(dian)壓(ya)(ya)值的(de)(de)變(bian)化量(liang)便(bian)可反映出點(dian)(dian)接(jie)觸處壓(ya)(ya)力或集中(zhong)(zhong)(zhong)載荷(he)的(de)(de)大(da)小。集中(zhong)(zhong)(zhong)載荷(he)與軸向(xiang)長(chang)度、電(dian)(dian)阻(zu)(zu)(zu)阻(zu)(zu)(zu)值與軸向(xiang)長(chang)度的(de)(de)關(guan)系、電(dian)(dian)壓(ya)(ya)與電(dian)(dian)阻(zu)(zu)(zu)的(de)(de)關(guan)系如下(xia)：

ΔL=FLES---(1)

其中：L——壓敏電阻的原(yuan)始厚度；

S——壓敏(min)電阻的橫(heng)截(jie)面(mian)面(mian)積；

F——作用于壓敏電阻上的(de)集中載荷；

E——壓敏電(dian)阻(zu)的彈性模量；

ΔL——壓敏電阻油墨厚(hou)度的改變量。

R=ρLS---(2)

其(qi)中：L——壓敏(min)電阻油墨的厚(hou)度；

S——壓敏電阻(zu)油墨的橫截面(mian)(mian)面(mian)(mian)積；

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

R——壓(ya)敏電阻油(you)墨(mo)的(de)電阻值。

                U＝IR        (3)

其中：I——流經壓敏電阻的電流值；

R——壓敏電阻(zu)油墨的(de)電阻(zu)值；

U——壓敏電阻油墨的電壓值；

如圖4所示，絲網印刷(shua)單點力(li)(li)(li)片式(shi)傳感(gan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)因為只受到軸(zhou)向(xiang)壓(ya)(ya)(ya)(ya)縮變(bian)(bian)(bian)(bian)(bian)形而(er)引(yin)起(qi)(qi)了(le)(le)其(qi)(qi)阻(zu)(zu)(zu)(zu)值(zhi)的(de)(de)(de)(de)(de)改變(bian)(bian)(bian)(bian)(bian)，因此在(zai)測(ce)量電(dian)(dian)(dian)(dian)(dian)路中(zhong)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)可(ke)(ke)以(yi)被當(dang)(dang)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)路中(zhong)的(de)(de)(de)(de)(de)可(ke)(ke)變(bian)(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)對待(dai)；同時又由于(yu)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)的(de)(de)(de)(de)(de)改變(bian)(bian)(bian)(bian)(bian)引(yin)起(qi)(qi)了(le)(le)加(jia)在(zai)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)兩端電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)的(de)(de)(de)(de)(de)改變(bian)(bian)(bian)(bian)(bian)，因此壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)端電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改變(bian)(bian)(bian)(bian)(bian)可(ke)(ke)以(yi)被當(dang)(dang)作(zuo)(zuo)檢(jian)測(ce)電(dian)(dian)(dian)(dian)(dian)路的(de)(de)(de)(de)(de)輸(shu)(shu)入變(bian)(bian)(bian)(bian)(bian)量信(xin)號(hao)(hao)(hao)。由于(yu)單點力(li)(li)(li)傳感(gan)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)因外力(li)(li)(li)作(zuo)(zuo)用而(er)引(yin)起(qi)(qi)了(le)(le)加(jia)在(zai)其(qi)(qi)兩端電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改變(bian)(bian)(bian)(bian)(bian)，反(fan)(fan)相(xiang)(xiang)(xiang)比(bi)(bi)例(li)(li)(li)放(fang)(fang)大電(dian)(dian)(dian)(dian)(dian)路的(de)(de)(de)(de)(de)輸(shu)(shu)入端恰好是(shi)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)端電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改變(bian)(bian)(bian)(bian)(bian)端；因此壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)端電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改變(bian)(bian)(bian)(bian)(bian)必(bi)然引(yin)起(qi)(qi)了(le)(le)反(fan)(fan)相(xiang)(xiang)(xiang)比(bi)(bi)例(li)(li)(li)放(fang)(fang)大電(dian)(dian)(dian)(dian)(dian)路I輸(shu)(shu)出電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)的(de)(de)(de)(de)(de)改變(bian)(bian)(bian)(bian)(bian)，也(ye)(ye)就是(shi)說(shuo)單點力(li)(li)(li)傳感(gan)器(qi)(qi)(qi)受外力(li)(li)(li)作(zuo)(zuo)用是(shi)可(ke)(ke)以(yi)引(yin)起(qi)(qi)測(ce)量電(dian)(dian)(dian)(dian)(dian)路中(zhong)相(xiang)(xiang)(xiang)應電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改變(bian)(bian)(bian)(bian)(bian)的(de)(de)(de)(de)(de)。當(dang)(dang)外力(li)(li)(li)作(zuo)(zuo)用于(yu)單點力(li)(li)(li)傳感(gan)器(qi)(qi)(qi)后(hou)由于(yu)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)值(zhi)的(de)(de)(de)(de)(de)改變(bian)(bian)(bian)(bian)(bian)而(er)產(chan)生了(le)(le)一定的(de)(de)(de)(de)(de)微(wei)弱(ruo)電(dian)(dian)(dian)(dian)(dian)信(xin)號(hao)(hao)(hao)，通(tong)(tong)過(guo)(guo)反(fan)(fan)相(xiang)(xiang)(xiang)比(bi)(bi)例(li)(li)(li)放(fang)(fang)大器(qi)(qi)(qi)I將該信(xin)號(hao)(hao)(hao)放(fang)(fang)大；然后(hou)再通(tong)(tong)過(guo)(guo)低通(tong)(tong)濾波(bo)器(qi)(qi)(qi)將其(qi)(qi)他高頻干擾信(xin)號(hao)(hao)(hao)過(guo)(guo)濾或者去(qu)除(chu)；接著(zhu)再通(tong)(tong)過(guo)(guo)反(fan)(fan)相(xiang)(xiang)(xiang)比(bi)(bi)例(li)(li)(li)放(fang)(fang)大器(qi)(qi)(qi)II將電(dian)(dian)(dian)(dian)(dian)信(xin)號(hao)(hao)(hao)還原到最初的(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)位(wei)(因為前后(hou)經過(guo)(guo)了(le)(le)兩次反(fan)(fan)相(xiang)(xiang)(xiang)放(fang)(fang)大，因此經過(guo)(guo)處理后(hou)的(de)(de)(de)(de)(de)信(xin)號(hao)(hao)(hao)可(ke)(ke)以(yi)恢復到原來(lai)的(de)(de)(de)(de)(de)正電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)，同時將微(wei)弱(ruo)電(dian)(dian)(dian)(dian)(dian)信(xin)號(hao)(hao)(hao)值(zhi)放(fang)(fang)大了(le)(le))；最后(hou)再通(tong)(tong)過(guo)(guo)A/D轉換(huan)器(qi)(qi)(qi)限(xian)壓(ya)(ya)(ya)(ya)轉換(huan)將外力(li)(li)(li)引(yin)起(qi)(qi)的(de)(de)(de)(de)(de)并(bing)經過(guo)(guo)處理的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)信(xin)號(hao)(hao)(hao)轉換(huan)為計算機能(neng)識別的(de)(de)(de)(de)(de)數字電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)信(xin)號(hao)(hao)(hao)，當(dang)(dang)然也(ye)(ye)可(ke)(ke)以(yi)直接將反(fan)(fan)相(xiang)(xiang)(xiang)比(bi)(bi)例(li)(li)(li)放(fang)(fang)大器(qi)(qi)(qi)II處理后(hou)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)信(xin)號(hao)(hao)(hao)直接輸(shu)(shu)入至可(ke)(ke)以(yi)接收該信(xin)號(hao)(hao)(hao)的(de)(de)(de)(de)(de)模(mo)擬(ni)(ni)顯示儀(yi)器(qi)(qi)(qi)或處理儀(yi)器(qi)(qi)(qi)例(li)(li)(li)如模(mo)擬(ni)(ni)信(xin)號(hao)(hao)(hao)示波(bo)顯示器(qi)(qi)(qi)或者模(mo)擬(ni)(ni)信(xin)號(hao)(hao)(hao)處理電(dian)(dian)(dian)(dian)(dian)路板(ban)。