技術領域

本發明涉及一種傳感器(qi)及其制造方法，特別涉及一種用于在某一狹小接觸區域中(zhong)對一點(dian)接觸物體間(jian)的壓(ya)力(li)(li)或集(ji)中(zhong)力(li)(li)進行(xing)檢(jian)測的柔性單點(dian)力(li)(li)片(pian)式傳感器(qi)及其制造方法。

背景技術

壓(ya)力(li)(li)(li)傳(chuan)感(gan)(gan)(gan)器及檢(jian)測(ce)技術在(zai)航空(kong)航天、軍事工(gong)業、汽車、船舶制(zhi)造(zao)、工(gong)業自動化、醫學(xue)研(yan)究、生物(wu)醫療等領域(yu)(yu)中發揮著重要(yao)的作(zuo)(zuo)用(yong)(yong)。然而在(zai)上述應用(yong)(yong)領域(yu)(yu)，許多場合(he)需在(zai)某一狹小空(kong)間(jian)(jian)中對(dui)某一點(dian)接觸物(wu)體(ti)間(jian)(jian)的壓(ya)力(li)(li)(li)或(huo)集(ji)中力(li)(li)(li)進行檢(jian)測(ce)，例如(ru)點(dian)接觸物(wu)體(ti)間(jian)(jian)在(zai)運動過程(cheng)中摩擦(ca)力(li)(li)(li)相互作(zuo)(zuo)用(yong)(yong)過程(cheng)的研(yan)究、例如(ru)檢(jian)測(ce)空(kong)間(jian)(jian)凸輪與滾子從動件處于(yu)點(dian)接觸狀(zhuang)態下的相互作(zuo)(zuo)用(yong)(yong)力(li)(li)(li)、檢(jian)測(ce)某一對(dui)牙齒嚙合(he)時(shi)的相互作(zuo)(zuo)用(yong)(yong)力(li)(li)(li)等。由于(yu)受到傳(chuan)感(gan)(gan)(gan)器重量、體(ti)積以及工(gong)作(zuo)(zuo)空(kong)間(jian)(jian)(如(ru)狹縫)的限制(zhi)，這時(shi)傳(chuan)統壓(ya)力(li)(li)(li)傳(chuan)感(gan)(gan)(gan)器便(bian)不能(neng)用(yong)(yong)于(yu)上述場合(he)下的使(shi)用(yong)(yong)來檢(jian)測(ce)某一點(dian)接觸物(wu)體(ti)間(jian)(jian)的壓(ya)力(li)(li)(li)或(huo)集(ji)中力(li)(li)(li)。即便(bian)勉強使(shi)用(yong)(yong)，也不能(neng)滿足操作(zuo)(zuo)便(bian)捷(jie)的要(yao)求，

發明內容

本發明針對傳(chuan)(chuan)統壓(ya)力傳(chuan)(chuan)感(gan)器(qi)不(bu)能(neng)對某(mou)一(yi)點(dian)(dian)接觸物(wu)體(ti)間壓(ya)力進(jin)行檢測、體(ti)積大、重(zhong)(zhong)量重(zhong)(zhong)、操作(zuo)不(bu)方便(bian)的缺點(dian)(dian)；提(ti)供了一(yi)種能(neng)夠檢測出某(mou)一(yi)點(dian)(dian)接觸物(wu)體(ti)間壓(ya)力的柔性單點(dian)(dian)力片式傳(chuan)(chuan)感(gan)器(qi)，該傳(chuan)(chuan)感(gan)器(qi)具有(you)體(ti)積小、重(zhong)(zhong)量輕、制作(zuo)簡單、可低成本批量化生產的特(te)點(dian)(dian)，并且可重(zhong)(zhong)復使用、操作(zuo)簡便(bian)。

本發明(ming)的(de)另一(yi)個(ge)目(mu)的(de)是提供一(yi)種(zhong)該(gai)傳感器的(de)制(zhi)造方(fang)法。

為達到(dao)上(shang)述(shu)目(mu)的，本發明是采取如下技術方案予以實現(xian)的：

一種(zhong)柔性單點力(li)片式傳(chuan)感器，包括(kuo)壓敏(min)體(ti)(ti)(ti)、分別(bie)設(she)(she)置在壓敏(min)體(ti)(ti)(ti)上(shang)(shang)(shang)(shang)下(xia)端面(mian)的(de)(de)(de)兩(liang)(liang)個(ge)(ge)電(dian)(dian)極(ji)(ji)連(lian)(lian)接(jie)(jie)片，其特征(zheng)在于，還包括(kuo)有(you)(you)形狀大小相(xiang)同的(de)(de)(de)上(shang)(shang)(shang)(shang)基(ji)(ji)板(ban)和下(xia)基(ji)(ji)板(ban)，上(shang)(shang)(shang)(shang)、下(xia)基(ji)(ji)板(ban)之(zhi)間(jian)由粘接(jie)(jie)層封接(jie)(jie)；在上(shang)(shang)(shang)(shang)基(ji)(ji)板(ban)長度方(fang)向的(de)(de)(de)一側設(she)(she)置有(you)(you)一凸(tu)起(qi)(qi)；在相(xiang)對該凸(tu)起(qi)(qi)的(de)(de)(de)下(xia)基(ji)(ji)板(ban)上(shang)(shang)(shang)(shang)設(she)(she)置有(you)(you)一凹(ao)陷，該凹(ao)陷與所(suo)(suo)(suo)(suo)述(shu)凸(tu)起(qi)(qi)之(zhi)間(jian)形成一個(ge)(ge)密閉的(de)(de)(de)壓敏(min)體(ti)(ti)(ti)室，其中封裝(zhuang)有(you)(you)所(suo)(suo)(suo)(suo)述(shu)的(de)(de)(de)壓敏(min)體(ti)(ti)(ti)及電(dian)(dian)極(ji)(ji)連(lian)(lian)接(jie)(jie)片，所(suo)(suo)(suo)(suo)述(shu)壓敏(min)體(ti)(ti)(ti)室的(de)(de)(de)大小剛好與壓敏(min)體(ti)(ti)(ti)的(de)(de)(de)大小吻合(he)；所(suo)(suo)(suo)(suo)述(shu)下(xia)基(ji)(ji)板(ban)1沿其長度方(fang)向設(she)(she)置有(you)(you)兩(liang)(liang)條相(xiang)互平行的(de)(de)(de)印刷(shua)(shua)電(dian)(dian)極(ji)(ji)6，每個(ge)(ge)印刷(shua)(shua)電(dian)(dian)極(ji)(ji)分別(bie)連(lian)(lian)接(jie)(jie)位于壓敏(min)體(ti)(ti)(ti)上(shang)(shang)(shang)(shang)或下(xia)端面(mian)的(de)(de)(de)電(dian)(dian)極(ji)(ji)連(lian)(lian)接(jie)(jie)片9和伸出下(xia)基(ji)(ji)板(ban)的(de)(de)(de)電(dian)(dian)極(ji)(ji)引出片3；所(suo)(suo)(suo)(suo)述(shu)下(xia)基(ji)(ji)板(ban)上(shang)(shang)(shang)(shang)的(de)(de)(de)兩(liang)(liang)條印刷(shua)(shua)電(dian)(dian)極(ji)(ji)6從連(lian)(lian)接(jie)(jie)電(dian)(dian)極(ji)(ji)連(lian)(lian)接(jie)(jie)片9到(dao)連(lian)(lian)接(jie)(jie)電(dian)(dian)極(ji)(ji)引出片3一段的(de)(de)(de)上(shang)(shang)(shang)(shang)表面(mian)設(she)(she)置有(you)(you)電(dian)(dian)極(ji)(ji)保護(hu)膜。

一(yi)種上述柔性單點力片式傳感器的制(zhi)造方法，其特征(zheng)在于，包括如下步(bu)驟：

a.先制(zhi)備形狀(zhuang)大小相(xiang)同的(de)上基板(ban)(ban)和下(xia)基板(ban)(ban)，在上基板(ban)(ban)長度方向(xiang)的(de)一(yi)側(ce)設置(zhi)一(yi)凸(tu)起；在相(xiang)對該(gai)凸(tu)起的(de)下(xia)基板(ban)(ban)上設置(zhi)一(yi)凹陷(xian)；

b.將下(xia)基(ji)(ji)板1固定在絲網印刷機的(de)印刷臺上(shang)(shang)，用導電(dian)料漿沿下(xia)基(ji)(ji)板長(chang)度方(fang)向從遠(yuan)(yuan)離凹(ao)(ao)陷一側到(dao)凹(ao)(ao)陷的(de)上(shang)(shang)表面印制兩條印刷電(dian)極，干燥后，在下(xia)基(ji)(ji)板遠(yuan)(yuan)離凹(ao)(ao)陷的(de)一側設(she)置兩個外露的(de)電(dian)極引出片3。

c.在下(xia)基(ji)板凹陷中涂(tu)敷壓(ya)(ya)(ya)敏(min)(min)電(dian)阻油墨，并(bing)放(fang)置(zhi)一個壓(ya)(ya)(ya)敏(min)(min)體(ti)(ti)，該壓(ya)(ya)(ya)敏(min)(min)體(ti)(ti)上、下(xia)端面(mian)(mian)事(shi)先(xian)分別(bie)焊接(jie)好兩(liang)個電(dian)極(ji)連(lian)接(jie)片9，位于壓(ya)(ya)(ya)敏(min)(min)體(ti)(ti)上、下(xia)端面(mian)(mian)的兩(liang)電(dian)極(ji)連(lian)接(jie)片9分別(bie)連(lian)接(jie)至位于下(xia)基(ji)板上的兩(liang)條(tiao)印刷電(dian)極(ji)6的一端，兩(liang)條(tiao)印刷電(dian)極(ji)6的另(ling)一端連(lian)接(jie)外露的兩(liang)個電(dian)極(ji)引出片3；同時，在上基(ji)板4的凸起內表(biao)面(mian)(mian)上涂(tu)敷壓(ya)(ya)(ya)敏(min)(min)電(dian)阻油墨。

d.在下基板的(de)兩條(tiao)印刷電(dian)極6上(shang)從連接電(dian)極連接片(pian)9到連接電(dian)極引出片(pian)3的(de)一(yi)段上(shang)表面涂敷(fu)一(yi)層(ceng)電(dian)極保護膜(mo)并干燥。

e.將上、下(xia)基板(ban)用粘接(jie)(jie)層復合(he)，使所述凸起與凹陷(xian)之間形(xing)成一個(ge)的密閉壓敏(min)(min)體室(shi)，將壓敏(min)(min)體及(ji)電極(ji)連接(jie)(jie)片封裝在(zai)其(qi)內，壓敏(min)(min)體室(shi)的大小剛好與壓敏(min)(min)體的大小吻合(he)，同時兩條印刷電極(ji)相互平(ping)行(xing)。

以上(shang)方(fang)法(fa)中，所述的(de)印刷(shua)電(dian)極(ji)用(yong)導電(dian)漿(jiang)料為銀導電(dian)漿(jiang)料；所述的(de)電(dian)極(ji)保護膜(mo)材料采用(yong)羥乙(yi)基(ji)纖維素(su)；所述的(de)壓敏電(dian)阻(zu)油墨(mo)(mo)采用(yong)碳二硫(liu)化鉬油墨(mo)(mo)；所述的(de)上(shang)、下(xia)基(ji)板(ban)采用(yong)聚氯(lv)乙(yi)烯材料制成矩形基(ji)片；所述的(de)粘接(jie)層采用(yong)環氧樹脂。

本(ben)發明的(de)(de)(de)柔(rou)性(xing)(xing)單點(dian)力片(pian)式(shi)傳感(gan)器不需要外加保護(hu)裝置，不用將壓(ya)敏電(dian)(dian)阻(zu)直(zhi)接(jie)置入被測對(dui)(dui)(dui)象內部，只需將被測對(dui)(dui)(dui)象的(de)(de)(de)點(dian)接(jie)觸(chu)部位(wei)與壓(ya)敏電(dian)(dian)阻(zu)所對(dui)(dui)(dui)應的(de)(de)(de)壓(ya)敏體室的(de)(de)(de)聚氯乙(yi)烯(xi)PVC絕(jue)(jue)緣基片(pian)直(zhi)接(jie)接(jie)觸(chu)即可(ke)；同時壓(ya)敏電(dian)(dian)阻(zu)材料在(zai)工作過(guo)程中始終受到(dao)了聚氯乙(yi)烯(xi)PVC片(pian)的(de)(de)(de)絕(jue)(jue)緣保護(hu)。由(you)于兩(liang)條(tiao)銀(yin)導電(dian)(dian)電(dian)(dian)極(ji)均處于羥(qian)乙(yi)基纖維(wei)素HEC的(de)(de)(de)絕(jue)(jue)緣保護(hu)下，可(ke)有(you)效防止兩(liang)電(dian)(dian)極(ji)間間距(ju)太小(xiao)而(er)引(yin)起的(de)(de)(de)電(dian)(dian)子遷移(yi)所造成的(de)(de)(de)電(dian)(dian)極(ji)間短(duan)路(lu)現象。該柔(rou)性(xing)(xing)單點(dian)力片(pian)式(shi)傳感(gan)器只有(you)電(dian)(dian)極(ji)引(yin)出片(pian)部分區域外露，因(yin)此具(ju)有(you)抗強干(gan)擾的(de)(de)(de)優點(dian)。

本發明(ming)采用(yong)基(ji)于絲網印刷工藝的(de)(de)制(zhi)造(zao)方法，使(shi)制(zhi)得的(de)(de)單點(dian)力傳感(gan)器(qi)具(ju)有重量輕、體積小(xiao)(片狀)、成本低、制(zhi)作簡單、可批量化(hua)生產的(de)(de)特點(dian)，并(bing)可重復使(shi)用(yong)、操(cao)作便捷。該傳感(gan)器(qi)可應用(yong)于工作空間狹小(xiao)的(de)(de)某一點(dian)接(jie)觸物體間的(de)(de)壓力或集(ji)中力的(de)(de)檢(jian)測以及類似特殊(shu)應用(yong)場合。

附圖說明

圖1為(wei)本發明柔性(xing)單點力片式傳感器結(jie)構(gou)示意圖。圖中：1、下基板(ban)；2、粘接層；3、電極(ji)(ji)引出片；4、上基板(ban)；5、電極(ji)(ji)保護膜；6、印(yin)刷電極(ji)(ji)；7、壓敏體。

圖(tu)2為圖(tu)1的(de)俯視(shi)其及印刷電(dian)極(ji)的(de)局部剖視(shi)圖(tu)。圖(tu)中：8、上基板(ban)凸起；9、電(dian)極(ji)連接片。

圖(tu)3為(wei)圖(tu)2的剖面圖(tu)。圖(tu)中：10、下基板凹(ao)陷。

圖4為本發明柔性單(dan)點力片式(shi)傳(chuan)感器一個應用實(shi)例的測量電(dian)路原(yuan)理圖。

具體實(shi)施方式(shi)

下面結合(he)附圖(tu)及(ji)實施例對本(ben)發明作進一步(bu)的(de)詳細說明。

如圖1-圖3所(suo)示，一(yi)(yi)種(zhong)柔(rou)性單點力片(pian)式傳感器，包括上(shang)基(ji)(ji)板4和下(xia)(xia)基(ji)(ji)板1、壓(ya)敏(min)體(ti)(ti)7、設(she)置(zhi)(zhi)在壓(ya)敏(min)體(ti)(ti)7垂直(zhi)兩(liang)端面的(de)(de)兩(liang)個(ge)(ge)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)(lian)(lian)(lian)接(jie)(jie)(jie)片(pian)9，上(shang)、下(xia)(xia)基(ji)(ji)板之間由(you)環氧(yang)樹(shu)脂粘(zhan)接(jie)(jie)(jie)層2封接(jie)(jie)(jie)；上(shang)、下(xia)(xia)基(ji)(ji)板4、1可由(you)聚氯乙烯(PVC)制成相同大(da)小尺寸(cun)的(de)(de)矩(ju)形(xing)基(ji)(ji)片(pian)；在靠近上(shang)基(ji)(ji)板4長度方(fang)(fang)向(xiang)的(de)(de)左側(ce)設(she)置(zhi)(zhi)有(you)(you)一(yi)(yi)凸(tu)(tu)起8；在相對該(gai)凸(tu)(tu)起8的(de)(de)下(xia)(xia)基(ji)(ji)板上(shang)設(she)置(zhi)(zhi)有(you)(you)一(yi)(yi)凹陷(xian)(xian)10，該(gai)凹陷(xian)(xian)與(yu)凸(tu)(tu)起之間形(xing)成一(yi)(yi)個(ge)(ge)的(de)(de)密閉壓(ya)敏(min)體(ti)(ti)室，其中封裝有(you)(you)壓(ya)敏(min)體(ti)(ti)7及電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)(lian)(lian)(lian)接(jie)(jie)(jie)片(pian)9，壓(ya)敏(min)體(ti)(ti)室的(de)(de)大(da)小剛好與(yu)壓(ya)敏(min)體(ti)(ti)7的(de)(de)大(da)小吻合，壓(ya)敏(min)體(ti)(ti)7為圓片(pian)或方(fang)(fang)塊(kuai)形(xing)壓(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻；下(xia)(xia)基(ji)(ji)板1上(shang)設(she)置(zhi)(zhi)有(you)(you)兩(liang)條沿(yan)其長度方(fang)(fang)向(xiang)相互(hu)平行的(de)(de)印刷(shua)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)6，印刷(shua)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)6為銀導電(dian)(dian)(dian)(dian)(dian)(dian)帶(dai)狀薄膜(mo)。每條印刷(shua)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)在凹陷(xian)(xian)右邊沿(yan)處(chu)的(de)(de)一(yi)(yi)端連(lian)(lian)(lian)(lian)(lian)接(jie)(jie)(jie)一(yi)(yi)個(ge)(ge)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)(lian)(lian)(lian)接(jie)(jie)(jie)片(pian)9；遠離凹陷(xian)(xian)到下(xia)(xia)基(ji)(ji)板1右側(ce)處(chu)的(de)(de)另(ling)一(yi)(yi)端連(lian)(lian)(lian)(lian)(lian)接(jie)(jie)(jie)一(yi)(yi)個(ge)(ge)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)引出(chu)(chu)片(pian)3，該(gai)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)引出(chu)(chu)片(pian)3外露下(xia)(xia)基(ji)(ji)板右側(ce)；印刷(shua)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)6從連(lian)(lian)(lian)(lian)(lian)接(jie)(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)(lian)(lian)(lian)接(jie)(jie)(jie)片(pian)9到連(lian)(lian)(lian)(lian)(lian)接(jie)(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)引出(chu)(chu)片(pian)3的(de)(de)一(yi)(yi)段上(shang)表面設(she)置(zhi)(zhi)有(you)(you)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)保(bao)護(hu)膜(mo)5，該(gai)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)保(bao)護(hu)膜(mo)為羥乙基(ji)(ji)纖維素(su)(HEC)膜(mo)層。

以上柔(rou)性單點力片式傳感器制造方法，包括下述步驟(zou)：

a.先制備形狀(zhuang)大(da)小相(xiang)同的上(shang)(shang)基(ji)板(ban)和下基(ji)板(ban)，在(zai)上(shang)(shang)基(ji)板(ban)長度方向的一側設置一凸(tu)起；在(zai)相(xiang)對(dui)該凸(tu)起的下基(ji)板(ban)上(shang)(shang)設置一凹(ao)陷；

b.將(jiang)下基板1固定在(zai)絲網(wang)印(yin)(yin)刷機的(de)(de)印(yin)(yin)刷臺(tai)上，用導(dao)電料漿沿下基板長度方向從遠離凹陷一側到凹陷的(de)(de)上表面印(yin)(yin)制(zhi)兩條印(yin)(yin)刷電極(ji)，干燥后，在(zai)下基板遠離凹陷的(de)(de)一側設置兩個(ge)外露的(de)(de)電極(ji)引出(chu)片3。

c.在(zai)(zai)下基板(ban)凹陷中涂(tu)(tu)敷(fu)壓敏電(dian)阻油(you)墨(mo)，并放(fang)置一個(ge)壓敏體(ti)，該(gai)壓敏體(ti)上、下端(duan)面事先分別(bie)焊接(jie)(jie)好兩個(ge)電(dian)極(ji)連接(jie)(jie)片9，位于壓敏體(ti)上、下端(duan)面的(de)兩電(dian)極(ji)連接(jie)(jie)片9分別(bie)連接(jie)(jie)至(zhi)位于下基板(ban)上的(de)兩條印刷電(dian)極(ji)6，兩條印刷電(dian)極(ji)6的(de)另(ling)一端(duan)連接(jie)(jie)外露的(de)兩個(ge)電(dian)極(ji)引出片3；同時，在(zai)(zai)上基板(ban)4的(de)凸起內(nei)表(biao)面上涂(tu)(tu)敷(fu)壓敏電(dian)阻油(you)墨(mo)。

d.在下基板的(de)(de)兩條印刷電(dian)極6上從連(lian)接電(dian)極連(lian)接片9到連(lian)接電(dian)極引出片3的(de)(de)一(yi)段上表面涂敷一(yi)層電(dian)極保護膜并干燥。

e.將上、下基板用粘接(jie)層復合，使所(suo)述凸(tu)起與(yu)凹陷(xian)之(zhi)間(jian)形(xing)成一個的(de)密閉壓(ya)(ya)敏(min)體室，將壓(ya)(ya)敏(min)體及電極連(lian)接(jie)片封裝在其內，壓(ya)(ya)敏(min)體室的(de)大(da)小(xiao)剛(gang)好與(yu)壓(ya)(ya)敏(min)體的(de)大(da)小(xiao)吻(wen)合，同時兩條印刷(shua)電極相互平行。

當上述(shu)絲網印刷(shua)單點力片式傳感器與外接(jie)電(dian)(dian)(dian)路連接(jie)并(bing)通過能(neng)正常工(gong)作的測試后(hou)，該(gai)傳感器外露部分電(dian)(dian)(dian)極(ji)引(yin)出片3與外接(jie)導線連接(jie)部分用絕緣硅膠將其覆蓋以(yi)防銀電(dian)(dian)(dian)極(ji)長期(qi)處于在空(kong)氣中被氧化而削(xue)弱或喪失了其導電(dian)(dian)(dian)性能(neng)。

本發明柔(rou)性(xing)單(dan)點(dian)力片(pian)式傳感器的(de)(de)(de)檢(jian)測原理(li)如(ru)下：當處于(yu)(yu)點(dian)接觸(chu)狀態時(shi)物體間(jian)(jian)的(de)(de)(de)一(yi)(yi)集中載(zai)荷(集中力)作(zuo)用于(yu)(yu)壓(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)阻7上(shang)時(shi)，壓(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)阻因(yin)受到了(le)(le)(le)壓(ya)(ya)力作(zuo)用便發生了(le)(le)(le)一(yi)(yi)定的(de)(de)(de)壓(ya)(ya)縮變形，從而引起了(le)(le)(le)壓(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)阻值(zhi)(zhi)(zhi)的(de)(de)(de)變化，反(fan)映在電(dian)(dian)(dian)(dian)路上(shang)便是(shi)兩銀(yin)導電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)極6之間(jian)(jian)電(dian)(dian)(dian)(dian)壓(ya)(ya)值(zhi)(zhi)(zhi)的(de)(de)(de)改變；根據(ju)壓(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)阻上(shang)電(dian)(dian)(dian)(dian)壓(ya)(ya)值(zhi)(zhi)(zhi)相對于(yu)(yu)最初電(dian)(dian)(dian)(dian)壓(ya)(ya)值(zhi)(zhi)(zhi)的(de)(de)(de)變化量便可(ke)反(fan)映出點(dian)接觸(chu)處壓(ya)(ya)力或集中載(zai)荷的(de)(de)(de)大小。集中載(zai)荷與軸(zhou)向(xiang)長度、電(dian)(dian)(dian)(dian)阻阻值(zhi)(zhi)(zhi)與軸(zhou)向(xiang)長度的(de)(de)(de)關系(xi)、電(dian)(dian)(dian)(dian)壓(ya)(ya)與電(dian)(dian)(dian)(dian)阻的(de)(de)(de)關系(xi)如(ru)下：

ΔL=FLES---(1)

其中：L——壓敏電阻的原(yuan)始(shi)厚度；

S——壓(ya)敏電阻的橫截面(mian)面(mian)積；

F——作用于壓敏電阻上的集中載荷(he)；

E——壓敏電阻的彈(dan)性(xing)模量；

ΔL——壓敏電阻油(you)墨厚度的改變量。

R=ρLS---(2)

其(qi)中：L——壓(ya)敏(min)電阻油墨的厚度；

S——壓(ya)敏電阻油墨的橫截(jie)面(mian)面(mian)積(ji)；

ρ——壓敏電阻油墨的電阻率；

R——壓敏電阻(zu)油墨的(de)電阻(zu)值(zhi)。

                U＝IR        (3)

其中：I——流(liu)經壓(ya)敏電阻的電流(liu)值；

R——壓(ya)敏(min)電阻(zu)油墨(mo)的電阻(zu)值；

U——壓敏(min)電(dian)阻油(you)墨(mo)的(de)電(dian)壓值；

如圖(tu)4所示(shi)(shi)，絲網印刷單(dan)(dan)點(dian)力(li)片式(shi)傳(chuan)感器(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)壓(ya)(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)因為(wei)只受(shou)到軸向壓(ya)(ya)縮變(bian)(bian)形而(er)引(yin)起(qi)了(le)(le)(le)其阻(zu)(zu)值的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)，因此(ci)在測(ce)量電(dian)(dian)(dian)路(lu)(lu)(lu)中壓(ya)(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)可(ke)以(yi)(yi)(yi)被(bei)當(dang)作電(dian)(dian)(dian)路(lu)(lu)(lu)中的(de)(de)(de)(de)(de)(de)(de)(de)可(ke)變(bian)(bian)電(dian)(dian)(dian)阻(zu)(zu)對待；同時又由(you)(you)于壓(ya)(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)引(yin)起(qi)了(le)(le)(le)加(jia)在壓(ya)(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)兩端(duan)電(dian)(dian)(dian)壓(ya)(ya)值的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)，因此(ci)壓(ya)(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)端(duan)電(dian)(dian)(dian)壓(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)可(ke)以(yi)(yi)(yi)被(bei)當(dang)作檢測(ce)電(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)(de)(de)(de)(de)(de)(de)輸入(ru)變(bian)(bian)量信(xin)(xin)號(hao)(hao)。由(you)(you)于單(dan)(dan)點(dian)力(li)傳(chuan)感器(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)壓(ya)(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)因外力(li)作用而(er)引(yin)起(qi)了(le)(le)(le)加(jia)在其兩端(duan)電(dian)(dian)(dian)壓(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)，反相比例放(fang)(fang)(fang)大(da)(da)(da)(da)電(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)(de)(de)(de)(de)(de)(de)輸入(ru)端(duan)恰好是(shi)(shi)壓(ya)(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)端(duan)電(dian)(dian)(dian)壓(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)端(duan)；因此(ci)壓(ya)(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)端(duan)電(dian)(dian)(dian)壓(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)必然引(yin)起(qi)了(le)(le)(le)反相比例放(fang)(fang)(fang)大(da)(da)(da)(da)電(dian)(dian)(dian)路(lu)(lu)(lu)I輸出電(dian)(dian)(dian)壓(ya)(ya)值的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)，也(ye)就是(shi)(shi)說單(dan)(dan)點(dian)力(li)傳(chuan)感器(qi)(qi)受(shou)外力(li)作用是(shi)(shi)可(ke)以(yi)(yi)(yi)引(yin)起(qi)測(ce)量電(dian)(dian)(dian)路(lu)(lu)(lu)中相應電(dian)(dian)(dian)壓(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)的(de)(de)(de)(de)(de)(de)(de)(de)。當(dang)外力(li)作用于單(dan)(dan)點(dian)力(li)傳(chuan)感器(qi)(qi)后(hou)(hou)由(you)(you)于壓(ya)(ya)敏(min)電(dian)(dian)(dian)阻(zu)(zu)值的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)而(er)產生了(le)(le)(le)一定(ding)的(de)(de)(de)(de)(de)(de)(de)(de)微(wei)弱(ruo)電(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)，通(tong)過(guo)反相比例放(fang)(fang)(fang)大(da)(da)(da)(da)器(qi)(qi)I將(jiang)(jiang)該(gai)信(xin)(xin)號(hao)(hao)放(fang)(fang)(fang)大(da)(da)(da)(da)；然后(hou)(hou)再通(tong)過(guo)低通(tong)濾(lv)波器(qi)(qi)將(jiang)(jiang)其他高頻(pin)干擾信(xin)(xin)號(hao)(hao)過(guo)濾(lv)或(huo)者去除(chu)；接(jie)著再通(tong)過(guo)反相比例放(fang)(fang)(fang)大(da)(da)(da)(da)器(qi)(qi)II將(jiang)(jiang)電(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)還原到最(zui)初的(de)(de)(de)(de)(de)(de)(de)(de)相位(因為(wei)前后(hou)(hou)經過(guo)了(le)(le)(le)兩次反相放(fang)(fang)(fang)大(da)(da)(da)(da)，因此(ci)經過(guo)處理后(hou)(hou)的(de)(de)(de)(de)(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)可(ke)以(yi)(yi)(yi)恢復到原來的(de)(de)(de)(de)(de)(de)(de)(de)正電(dian)(dian)(dian)壓(ya)(ya)值，同時將(jiang)(jiang)微(wei)弱(ruo)電(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)值放(fang)(fang)(fang)大(da)(da)(da)(da)了(le)(le)(le))；最(zui)后(hou)(hou)再通(tong)過(guo)A/D轉(zhuan)換器(qi)(qi)限壓(ya)(ya)轉(zhuan)換將(jiang)(jiang)外力(li)引(yin)起(qi)的(de)(de)(de)(de)(de)(de)(de)(de)并經過(guo)處理的(de)(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)轉(zhuan)換為(wei)計算機能識別的(de)(de)(de)(de)(de)(de)(de)(de)數字電(dian)(dian)(dian)壓(ya)(ya)信(xin)(xin)號(hao)(hao)，當(dang)然也(ye)可(ke)以(yi)(yi)(yi)直接(jie)將(jiang)(jiang)反相比例放(fang)(fang)(fang)大(da)(da)(da)(da)器(qi)(qi)II處理后(hou)(hou)的(de)(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)壓(ya)(ya)信(xin)(xin)號(hao)(hao)直接(jie)輸入(ru)至可(ke)以(yi)(yi)(yi)接(jie)收該(gai)信(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)(de)(de)(de)(de)模擬顯示(shi)(shi)儀器(qi)(qi)或(huo)處理儀器(qi)(qi)例如模擬信(xin)(xin)號(hao)(hao)示(shi)(shi)波顯示(shi)(shi)器(qi)(qi)或(huo)者模擬信(xin)(xin)號(hao)(hao)處理電(dian)(dian)(dian)路(lu)(lu)(lu)板。