技術領域

本發(fa)明涉(she)及(ji)一種傳感器及(ji)其(qi)制(zhi)造方法(fa)，特別涉(she)及(ji)一種用于在某(mou)一狹小(xiao)接觸區域(yu)中(zhong)(zhong)對一點接觸物體間的壓(ya)力或集中(zhong)(zhong)力進(jin)行檢測的柔性(xing)單點力片(pian)式傳感器及(ji)其(qi)制(zhi)造方法(fa)。

背景技術

壓(ya)力(li)傳(chuan)(chuan)感(gan)器及檢(jian)(jian)(jian)測(ce)技(ji)術在(zai)(zai)航空(kong)航天、軍(jun)事(shi)工(gong)業、汽車、船(chuan)舶制造、工(gong)業自動化(hua)、醫(yi)學研究、生物醫(yi)療等領域(yu)中(zhong)發(fa)揮著(zhu)重要的作(zuo)(zuo)用(yong)。然(ran)而在(zai)(zai)上(shang)述應用(yong)領域(yu)，許多場(chang)合需在(zai)(zai)某(mou)一(yi)狹小空(kong)間(jian)中(zhong)對(dui)某(mou)一(yi)點(dian)(dian)接觸物體間(jian)的壓(ya)力(li)或集中(zhong)力(li)進(jin)行檢(jian)(jian)(jian)測(ce)，例如點(dian)(dian)接觸物體間(jian)在(zai)(zai)運動過(guo)程(cheng)中(zhong)摩擦(ca)力(li)相互作(zuo)(zuo)用(yong)過(guo)程(cheng)的研究、例如檢(jian)(jian)(jian)測(ce)空(kong)間(jian)凸輪與滾子從動件處于(yu)(yu)點(dian)(dian)接觸狀態下的相互作(zuo)(zuo)用(yong)力(li)、檢(jian)(jian)(jian)測(ce)某(mou)一(yi)對(dui)牙(ya)齒嚙合時的相互作(zuo)(zuo)用(yong)力(li)等。由(you)于(yu)(yu)受(shou)到傳(chuan)(chuan)感(gan)器重量、體積以及工(gong)作(zuo)(zuo)空(kong)間(jian)(如狹縫(feng))的限制，這時傳(chuan)(chuan)統壓(ya)力(li)傳(chuan)(chuan)感(gan)器便不能(neng)用(yong)于(yu)(yu)上(shang)述場(chang)合下的使(shi)用(yong)來檢(jian)(jian)(jian)測(ce)某(mou)一(yi)點(dian)(dian)接觸物體間(jian)的壓(ya)力(li)或集中(zhong)力(li)。即便勉強使(shi)用(yong)，也不能(neng)滿足操作(zuo)(zuo)便捷的要求，

發明內容

本發(fa)明針對(dui)傳(chuan)統(tong)壓(ya)力傳(chuan)感(gan)(gan)器不能對(dui)某一(yi)點接觸物(wu)體間壓(ya)力進(jin)行檢測(ce)、體積大、重(zhong)量重(zhong)、操(cao)作(zuo)(zuo)不方便(bian)的(de)缺(que)點；提(ti)供了一(yi)種(zhong)能夠(gou)檢測(ce)出某一(yi)點接觸物(wu)體間壓(ya)力的(de)柔(rou)性單(dan)(dan)點力片(pian)式傳(chuan)感(gan)(gan)器，該(gai)傳(chuan)感(gan)(gan)器具有體積小、重(zhong)量輕、制作(zuo)(zuo)簡(jian)單(dan)(dan)、可低成本批量化生產(chan)的(de)特(te)點，并且可重(zhong)復使用、操(cao)作(zuo)(zuo)簡(jian)便(bian)。

本(ben)發明的(de)(de)另(ling)一(yi)個目的(de)(de)是提供一(yi)種該傳感器的(de)(de)制造方法。

為(wei)達到上(shang)述目的，本發明是(shi)采(cai)取如(ru)下技術方案予以實現的：

一(yi)種柔性單點力片(pian)(pian)式傳(chuan)感器，包(bao)(bao)括壓(ya)(ya)(ya)敏(min)(min)(min)體(ti)(ti)、分別(bie)設(she)置(zhi)在壓(ya)(ya)(ya)敏(min)(min)(min)體(ti)(ti)上(shang)(shang)下端(duan)面(mian)的(de)(de)(de)兩個(ge)電(dian)(dian)極(ji)(ji)(ji)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)片(pian)(pian)，其特征(zheng)在于，還包(bao)(bao)括有形狀大小相同(tong)的(de)(de)(de)上(shang)(shang)基板(ban)和(he)下基板(ban)，上(shang)(shang)、下基板(ban)之間(jian)由粘(zhan)接(jie)(jie)(jie)(jie)層封接(jie)(jie)(jie)(jie)；在上(shang)(shang)基板(ban)長(chang)度(du)方(fang)向的(de)(de)(de)一(yi)側設(she)置(zhi)有一(yi)凸起(qi)；在相對該凸起(qi)的(de)(de)(de)下基板(ban)上(shang)(shang)設(she)置(zhi)有一(yi)凹陷，該凹陷與所述(shu)凸起(qi)之間(jian)形成一(yi)個(ge)密閉的(de)(de)(de)壓(ya)(ya)(ya)敏(min)(min)(min)體(ti)(ti)室，其中封裝(zhuang)有所述(shu)的(de)(de)(de)壓(ya)(ya)(ya)敏(min)(min)(min)體(ti)(ti)及電(dian)(dian)極(ji)(ji)(ji)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)片(pian)(pian)，所述(shu)壓(ya)(ya)(ya)敏(min)(min)(min)體(ti)(ti)室的(de)(de)(de)大小剛好與壓(ya)(ya)(ya)敏(min)(min)(min)體(ti)(ti)的(de)(de)(de)大小吻合；所述(shu)下基板(ban)1沿(yan)其長(chang)度(du)方(fang)向設(she)置(zhi)有兩條(tiao)相互平行的(de)(de)(de)印刷(shua)電(dian)(dian)極(ji)(ji)(ji)6，每個(ge)印刷(shua)電(dian)(dian)極(ji)(ji)(ji)分別(bie)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)位于壓(ya)(ya)(ya)敏(min)(min)(min)體(ti)(ti)上(shang)(shang)或下端(duan)面(mian)的(de)(de)(de)電(dian)(dian)極(ji)(ji)(ji)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)片(pian)(pian)9和(he)伸出下基板(ban)的(de)(de)(de)電(dian)(dian)極(ji)(ji)(ji)引出片(pian)(pian)3；所述(shu)下基板(ban)上(shang)(shang)的(de)(de)(de)兩條(tiao)印刷(shua)電(dian)(dian)極(ji)(ji)(ji)6從(cong)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)電(dian)(dian)極(ji)(ji)(ji)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)片(pian)(pian)9到連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)電(dian)(dian)極(ji)(ji)(ji)引出片(pian)(pian)3一(yi)段的(de)(de)(de)上(shang)(shang)表面(mian)設(she)置(zhi)有電(dian)(dian)極(ji)(ji)(ji)保護膜(mo)。

一種上(shang)述(shu)柔(rou)性單點力片(pian)式傳(chuan)感器的制造方法，其特(te)征在于，包括如(ru)下步驟：

a.先制備形狀大(da)小(xiao)相同的(de)上基(ji)板和下(xia)基(ji)板，在上基(ji)板長度方向(xiang)的(de)一側(ce)設置一凸(tu)起(qi)；在相對(dui)該凸(tu)起(qi)的(de)下(xia)基(ji)板上設置一凹陷；

b.將(jiang)下(xia)基板1固定在絲網印刷機的印刷臺上，用導(dao)電(dian)料漿沿下(xia)基板長(chang)度方(fang)向從遠(yuan)離凹(ao)(ao)陷(xian)一側到凹(ao)(ao)陷(xian)的上表面印制兩(liang)條印刷電(dian)極，干燥(zao)后，在下(xia)基板遠(yuan)離凹(ao)(ao)陷(xian)的一側設置(zhi)兩(liang)個外露的電(dian)極引出(chu)片(pian)3。

c.在(zai)下(xia)基板凹(ao)陷中(zhong)涂敷壓(ya)(ya)敏(min)(min)電(dian)(dian)(dian)阻油墨(mo)(mo)，并放置一(yi)個壓(ya)(ya)敏(min)(min)體，該(gai)壓(ya)(ya)敏(min)(min)體上(shang)、下(xia)端(duan)面事(shi)先分(fen)別焊接(jie)好兩(liang)個電(dian)(dian)(dian)極連接(jie)片(pian)(pian)9，位(wei)于(yu)壓(ya)(ya)敏(min)(min)體上(shang)、下(xia)端(duan)面的兩(liang)電(dian)(dian)(dian)極連接(jie)片(pian)(pian)9分(fen)別連接(jie)至(zhi)位(wei)于(yu)下(xia)基板上(shang)的兩(liang)條印刷(shua)電(dian)(dian)(dian)極6的一(yi)端(duan)，兩(liang)條印刷(shua)電(dian)(dian)(dian)極6的另一(yi)端(duan)連接(jie)外(wai)露的兩(liang)個電(dian)(dian)(dian)極引出片(pian)(pian)3；同(tong)時，在(zai)上(shang)基板4的凸起內表面上(shang)涂敷壓(ya)(ya)敏(min)(min)電(dian)(dian)(dian)阻油墨(mo)(mo)。

d.在下基板的兩條印刷電(dian)極(ji)(ji)6上(shang)從連接(jie)(jie)電(dian)極(ji)(ji)連接(jie)(jie)片9到連接(jie)(jie)電(dian)極(ji)(ji)引出片3的一段(duan)上(shang)表面涂敷一層電(dian)極(ji)(ji)保護膜(mo)并干燥。

e.將上、下(xia)基板(ban)用粘接(jie)層復合(he)，使所述凸起與(yu)凹陷之間形(xing)成(cheng)一(yi)個的密(mi)閉壓(ya)(ya)(ya)敏體室(shi)，將壓(ya)(ya)(ya)敏體及電(dian)極(ji)連接(jie)片封裝在其內，壓(ya)(ya)(ya)敏體室(shi)的大小剛好與(yu)壓(ya)(ya)(ya)敏體的大小吻合(he)，同時兩條印刷電(dian)極(ji)相互平行。

以上方法中(zhong)，所(suo)述(shu)(shu)的(de)印刷電極(ji)用(yong)(yong)導電漿料為銀(yin)導電漿料；所(suo)述(shu)(shu)的(de)電極(ji)保護膜材(cai)料采用(yong)(yong)羥乙基(ji)纖維素(su)；所(suo)述(shu)(shu)的(de)壓敏電阻油(you)(you)墨采用(yong)(yong)碳二硫化鉬(mu)油(you)(you)墨；所(suo)述(shu)(shu)的(de)上、下基(ji)板采用(yong)(yong)聚(ju)氯(lv)乙烯材(cai)料制成矩形(xing)基(ji)片；所(suo)述(shu)(shu)的(de)粘(zhan)接層采用(yong)(yong)環氧樹(shu)脂。

本(ben)發明的柔(rou)性單點力(li)片(pian)(pian)式傳(chuan)(chuan)感器不(bu)需(xu)要外加保(bao)護裝置，不(bu)用(yong)將壓敏電(dian)阻(zu)直(zhi)接(jie)(jie)(jie)置入被測對(dui)象內部，只(zhi)需(xu)將被測對(dui)象的點接(jie)(jie)(jie)觸部位與(yu)壓敏電(dian)阻(zu)所(suo)對(dui)應的壓敏體室的聚(ju)氯乙(yi)烯(xi)PVC絕緣基片(pian)(pian)直(zhi)接(jie)(jie)(jie)接(jie)(jie)(jie)觸即可(ke)；同時壓敏電(dian)阻(zu)材料(liao)在工作過程中始終受到(dao)了聚(ju)氯乙(yi)烯(xi)PVC片(pian)(pian)的絕緣保(bao)護。由于兩條銀(yin)導(dao)電(dian)電(dian)極(ji)均處于羥乙(yi)基纖(xian)維素HEC的絕緣保(bao)護下，可(ke)有效防止兩電(dian)極(ji)間間距(ju)太小而引(yin)起的電(dian)子遷移所(suo)造成的電(dian)極(ji)間短(duan)路現象。該柔(rou)性單點力(li)片(pian)(pian)式傳(chuan)(chuan)感器只(zhi)有電(dian)極(ji)引(yin)出片(pian)(pian)部分區(qu)域外露，因此具有抗強干擾(rao)的優點。

本發(fa)明采用(yong)基于(yu)絲網印刷工藝的(de)(de)制(zhi)造方法，使(shi)制(zhi)得的(de)(de)單點力傳(chuan)感(gan)器具有重量(liang)輕、體(ti)積(ji)小(片狀)、成本低、制(zhi)作(zuo)簡單、可(ke)批量(liang)化生產(chan)的(de)(de)特(te)點，并可(ke)重復使(shi)用(yong)、操作(zuo)便捷。該傳(chuan)感(gan)器可(ke)應用(yong)于(yu)工作(zuo)空間狹(xia)小的(de)(de)某一點接觸(chu)物體(ti)間的(de)(de)壓力或集中力的(de)(de)檢測以及(ji)類(lei)似特(te)殊應用(yong)場(chang)合。

附圖說明

圖(tu)1為本發明柔性單(dan)點力片式傳感器(qi)結構示意(yi)圖(tu)。圖(tu)中：1、下(xia)基(ji)(ji)板(ban)；2、粘接層；3、電(dian)極引出片；4、上基(ji)(ji)板(ban)；5、電(dian)極保護膜；6、印刷電(dian)極；7、壓敏體。

圖(tu)2為圖(tu)1的俯視其及印刷電(dian)極的局部剖(pou)視圖(tu)。圖(tu)中：8、上基(ji)板凸(tu)起；9、電(dian)極連接片。

圖3為圖2的剖面圖。圖中：10、下基(ji)板凹陷。

圖4為本(ben)發明柔性(xing)單點(dian)力片式傳(chuan)感器一個應用實例的測量電路原理圖。

具(ju)體實(shi)施方(fang)式

下面結合(he)附圖(tu)及實施例對本發明作進(jin)一步的(de)詳(xiang)細說明。

如圖(tu)(tu)1-圖(tu)(tu)3所示，一(yi)(yi)種柔性單(dan)點力片(pian)(pian)(pian)(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)(ya)(ya)敏體7、設(she)(she)置(zhi)(zhi)(zhi)在(zai)壓(ya)(ya)(ya)敏體7垂(chui)直兩端(duan)面的(de)(de)(de)兩個(ge)電(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)片(pian)(pian)(pian)(pian)9，上(shang)、下(xia)(xia)基(ji)(ji)板之間由環氧樹(shu)脂粘接(jie)(jie)(jie)(jie)層(ceng)(ceng)2封(feng)接(jie)(jie)(jie)(jie)；上(shang)、下(xia)(xia)基(ji)(ji)板4、1可由聚氯(lv)乙(yi)烯(xi)(PVC)制成相(xiang)同大(da)(da)小(xiao)尺寸的(de)(de)(de)矩形(xing)基(ji)(ji)片(pian)(pian)(pian)(pian)；在(zai)靠近(jin)上(shang)基(ji)(ji)板4長度(du)方(fang)向的(de)(de)(de)左側(ce)設(she)(she)置(zhi)(zhi)(zhi)有一(yi)(yi)凸起8；在(zai)相(xiang)對(dui)該凸起8的(de)(de)(de)下(xia)(xia)基(ji)(ji)板上(shang)設(she)(she)置(zhi)(zhi)(zhi)有一(yi)(yi)凹(ao)陷(xian)(xian)10，該凹(ao)陷(xian)(xian)與凸起之間形(xing)成一(yi)(yi)個(ge)的(de)(de)(de)密(mi)閉壓(ya)(ya)(ya)敏體室，其中封(feng)裝有壓(ya)(ya)(ya)敏體7及(ji)電(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)片(pian)(pian)(pian)(pian)9，壓(ya)(ya)(ya)敏體室的(de)(de)(de)大(da)(da)小(xiao)剛好與壓(ya)(ya)(ya)敏體7的(de)(de)(de)大(da)(da)小(xiao)吻合，壓(ya)(ya)(ya)敏體7為(wei)圓片(pian)(pian)(pian)(pian)或方(fang)塊(kuai)形(xing)壓(ya)(ya)(ya)敏電(dian)(dian)阻；下(xia)(xia)基(ji)(ji)板1上(shang)設(she)(she)置(zhi)(zhi)(zhi)有兩條沿其長度(du)方(fang)向相(xiang)互(hu)平行的(de)(de)(de)印(yin)刷電(dian)(dian)極(ji)6，印(yin)刷電(dian)(dian)極(ji)6為(wei)銀導電(dian)(dian)帶(dai)狀薄膜(mo)。每(mei)條印(yin)刷電(dian)(dian)極(ji)在(zai)凹(ao)陷(xian)(xian)右邊沿處的(de)(de)(de)一(yi)(yi)端(duan)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)一(yi)(yi)個(ge)電(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)片(pian)(pian)(pian)(pian)9；遠離凹(ao)陷(xian)(xian)到(dao)下(xia)(xia)基(ji)(ji)板1右側(ce)處的(de)(de)(de)另一(yi)(yi)端(duan)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)一(yi)(yi)個(ge)電(dian)(dian)極(ji)引(yin)出(chu)片(pian)(pian)(pian)(pian)3，該電(dian)(dian)極(ji)引(yin)出(chu)片(pian)(pian)(pian)(pian)3外(wai)露下(xia)(xia)基(ji)(ji)板右側(ce)；印(yin)刷電(dian)(dian)極(ji)6從連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)電(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)片(pian)(pian)(pian)(pian)9到(dao)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)電(dian)(dian)極(ji)引(yin)出(chu)片(pian)(pian)(pian)(pian)3的(de)(de)(de)一(yi)(yi)段上(shang)表(biao)面設(she)(she)置(zhi)(zhi)(zhi)有電(dian)(dian)極(ji)保(bao)護膜(mo)5，該電(dian)(dian)極(ji)保(bao)護膜(mo)為(wei)羥乙(yi)基(ji)(ji)纖維素(HEC)膜(mo)層(ceng)(ceng)。

以上柔性單點力片式傳感(gan)器制造方法，包括下述(shu)步(bu)驟：

a.先制備(bei)形狀大小相(xiang)同的上基(ji)板(ban)(ban)和下基(ji)板(ban)(ban)，在上基(ji)板(ban)(ban)長度方向(xiang)的一側(ce)設置(zhi)一凸起(qi)；在相(xiang)對(dui)該凸起(qi)的下基(ji)板(ban)(ban)上設置(zhi)一凹陷；

b.將(jiang)下基板(ban)1固定在(zai)絲網印刷機(ji)的印刷臺上，用導電(dian)料漿沿下基板(ban)長度方向從遠離(li)凹陷(xian)一(yi)側(ce)到凹陷(xian)的上表面印制兩條印刷電(dian)極，干燥(zao)后，在(zai)下基板(ban)遠離(li)凹陷(xian)的一(yi)側(ce)設置兩個外(wai)露的電(dian)極引(yin)出片3。

c.在(zai)下基(ji)板(ban)凹(ao)陷中涂敷(fu)壓(ya)敏電(dian)(dian)阻(zu)油(you)墨，并放置一個(ge)壓(ya)敏體(ti)，該壓(ya)敏體(ti)上(shang)、下端(duan)(duan)面事先分(fen)別(bie)焊接好兩個(ge)電(dian)(dian)極(ji)連(lian)接片9，位于(yu)壓(ya)敏體(ti)上(shang)、下端(duan)(duan)面的兩電(dian)(dian)極(ji)連(lian)接片9分(fen)別(bie)連(lian)接至位于(yu)下基(ji)板(ban)上(shang)的兩條印(yin)刷電(dian)(dian)極(ji)6，兩條印(yin)刷電(dian)(dian)極(ji)6的另一端(duan)(duan)連(lian)接外(wai)露(lu)的兩個(ge)電(dian)(dian)極(ji)引出片3；同時(shi)，在(zai)上(shang)基(ji)板(ban)4的凸起內表面上(shang)涂敷(fu)壓(ya)敏電(dian)(dian)阻(zu)油(you)墨。

d.在下(xia)基板(ban)的(de)兩條印(yin)刷電極(ji)6上(shang)從連接電極(ji)連接片(pian)9到連接電極(ji)引出片(pian)3的(de)一段(duan)上(shang)表面涂敷一層電極(ji)保護膜并(bing)干燥。

e.將(jiang)上(shang)、下基板用粘接層復合，使(shi)所述凸起與(yu)凹陷之(zhi)間形成(cheng)一(yi)個(ge)的密(mi)閉壓(ya)敏(min)體(ti)(ti)室，將(jiang)壓(ya)敏(min)體(ti)(ti)及(ji)電極連接片封裝(zhuang)在其內，壓(ya)敏(min)體(ti)(ti)室的大小(xiao)剛好與(yu)壓(ya)敏(min)體(ti)(ti)的大小(xiao)吻合，同時(shi)兩條印刷電極相互平行。

當上述絲網印刷(shua)單(dan)點力片(pian)式傳感(gan)器與外(wai)接電路(lu)連接并通過能正常(chang)工作(zuo)的測試(shi)后，該(gai)傳感(gan)器外(wai)露(lu)部分電極引(yin)出片(pian)3與外(wai)接導線連接部分用絕緣(yuan)硅膠將其覆蓋以防銀(yin)電極長(chang)期處于在空氣中被氧化而(er)削弱或喪失了其導電性能。

本發明柔性單點力(li)片式傳感器的(de)檢測原理如下(xia)：當(dang)處(chu)于點接(jie)觸(chu)狀(zhuang)態時(shi)物(wu)體(ti)間的(de)一(yi)集(ji)中(zhong)載荷(集(ji)中(zhong)力(li))作用于壓(ya)(ya)敏(min)(min)電(dian)(dian)(dian)阻7上(shang)(shang)時(shi)，壓(ya)(ya)敏(min)(min)電(dian)(dian)(dian)阻因受到了壓(ya)(ya)力(li)作用便(bian)(bian)發生了一(yi)定的(de)壓(ya)(ya)縮變(bian)(bian)形，從而(er)引起了壓(ya)(ya)敏(min)(min)電(dian)(dian)(dian)阻值的(de)變(bian)(bian)化(hua)，反映在電(dian)(dian)(dian)路上(shang)(shang)便(bian)(bian)是兩銀導電(dian)(dian)(dian)電(dian)(dian)(dian)極(ji)6之間電(dian)(dian)(dian)壓(ya)(ya)值的(de)改(gai)變(bian)(bian)；根據壓(ya)(ya)敏(min)(min)電(dian)(dian)(dian)阻上(shang)(shang)電(dian)(dian)(dian)壓(ya)(ya)值相對于最初(chu)電(dian)(dian)(dian)壓(ya)(ya)值的(de)變(bian)(bian)化(hua)量便(bian)(bian)可反映出點接(jie)觸(chu)處(chu)壓(ya)(ya)力(li)或集(ji)中(zhong)載荷的(de)大小。集(ji)中(zhong)載荷與(yu)軸向(xiang)長度、電(dian)(dian)(dian)阻阻值與(yu)軸向(xiang)長度的(de)關系(xi)(xi)、電(dian)(dian)(dian)壓(ya)(ya)與(yu)電(dian)(dian)(dian)阻的(de)關系(xi)(xi)如下(xia)：

ΔL=FLES---(1)

其中(zhong)：L——壓敏(min)電阻的原(yuan)始厚度；

S——壓敏電阻的橫截面面積；

F——作用于壓敏電(dian)阻上(shang)的(de)集中(zhong)載荷；

E——壓敏(min)電(dian)阻的彈(dan)性(xing)模量(liang)；

ΔL——壓敏電阻油墨(mo)厚度的(de)改變量(liang)。

R=ρLS---(2)

其(qi)中：L——壓(ya)敏電(dian)阻(zu)油(you)墨(mo)的厚度(du)；

S——壓敏電阻油墨的橫截面(mian)面(mian)積(ji)；

ρ——壓敏電阻(zu)油墨的(de)電阻(zu)率；

R——壓敏(min)電(dian)阻油墨的(de)電(dian)阻值。

                U＝IR        (3)

其(qi)中：I——流經(jing)壓敏電阻的(de)電流值(zhi)；

R——壓敏電阻油墨的電阻值；

U——壓敏電阻油(you)墨的電壓值；

如(ru)圖4所示，絲網印刷(shua)單(dan)點(dian)力(li)(li)片(pian)式傳(chuan)感器的(de)(de)(de)(de)(de)(de)壓(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻因為(wei)只受(shou)到軸向(xiang)壓(ya)(ya)(ya)縮變(bian)(bian)(bian)形而引起(qi)了其(qi)阻值(zhi)(zhi)的(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)，因此(ci)在(zai)測量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路中(zhong)壓(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻可以(yi)被當(dang)作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路中(zhong)的(de)(de)(de)(de)(de)(de)可變(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻對待(dai)；同時又由(you)于壓(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻的(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)引起(qi)了加在(zai)壓(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻兩端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)(zhi)的(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)，因此(ci)壓(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)可以(yi)被當(dang)作(zuo)檢測電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路的(de)(de)(de)(de)(de)(de)輸(shu)入變(bian)(bian)(bian)量(liang)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)。由(you)于單(dan)點(dian)力(li)(li)傳(chuan)感器的(de)(de)(de)(de)(de)(de)壓(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻因外力(li)(li)作(zuo)用而引起(qi)了加在(zai)其(qi)兩端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)，反相(xiang)比(bi)例放(fang)大(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路的(de)(de)(de)(de)(de)(de)輸(shu)入端(duan)恰好是壓(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)端(duan)；因此(ci)壓(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)必然(ran)引起(qi)了反相(xiang)比(bi)例放(fang)大(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路I輸(shu)出電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)(zhi)的(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)，也就(jiu)是說單(dan)點(dian)力(li)(li)傳(chuan)感器受(shou)外力(li)(li)作(zuo)用是可以(yi)引起(qi)測量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路中(zhong)相(xiang)應電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)的(de)(de)(de)(de)(de)(de)。當(dang)外力(li)(li)作(zuo)用于單(dan)點(dian)力(li)(li)傳(chuan)感器后由(you)于壓(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻值(zhi)(zhi)的(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)而產生了一定的(de)(de)(de)(de)(de)(de)微弱(ruo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)，通過(guo)反相(xiang)比(bi)例放(fang)大(da)器I將該(gai)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)放(fang)大(da)；然(ran)后再通過(guo)低通濾(lv)波器將其(qi)他高頻干擾(rao)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)過(guo)濾(lv)或(huo)者去除；接(jie)著再通過(guo)反相(xiang)比(bi)例放(fang)大(da)器II將電(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)還原(yuan)到最(zui)初的(de)(de)(de)(de)(de)(de)相(xiang)位(因為(wei)前后經過(guo)了兩次反相(xiang)放(fang)大(da)，因此(ci)經過(guo)處理(li)后的(de)(de)(de)(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)可以(yi)恢復到原(yuan)來的(de)(de)(de)(de)(de)(de)正電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)(zhi)，同時將微弱(ruo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)值(zhi)(zhi)放(fang)大(da)了)；最(zui)后再通過(guo)A/D轉換(huan)(huan)(huan)器限壓(ya)(ya)(ya)轉換(huan)(huan)(huan)將外力(li)(li)引起(qi)的(de)(de)(de)(de)(de)(de)并經過(guo)處理(li)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)轉換(huan)(huan)(huan)為(wei)計算機能識別的(de)(de)(de)(de)(de)(de)數字電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)，當(dang)然(ran)也可以(yi)直(zhi)接(jie)將反相(xiang)比(bi)例放(fang)大(da)器II處理(li)后的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)直(zhi)接(jie)輸(shu)入至可以(yi)接(jie)收該(gai)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)(de)(de)(de)模擬(ni)顯示儀器或(huo)處理(li)儀器例如(ru)模擬(ni)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)示波顯示器或(huo)者模擬(ni)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)處理(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路板。