技術領域

本發(fa)明涉及(ji)一種傳感器及(ji)其(qi)制造方(fang)法(fa)，特別涉及(ji)一種用(yong)于在某(mou)一狹小(xiao)接觸(chu)區域中(zhong)(zhong)對一點(dian)接觸(chu)物體(ti)間的壓(ya)力或集(ji)中(zhong)(zhong)力進行檢測的柔(rou)性單(dan)點(dian)力片式傳感器及(ji)其(qi)制造方(fang)法(fa)。

背景技術

壓(ya)力傳(chuan)(chuan)感(gan)器(qi)及(ji)(ji)檢(jian)測(ce)(ce)技(ji)術在航(hang)空(kong)航(hang)天、軍事工(gong)(gong)業(ye)、汽車、船舶制(zhi)造、工(gong)(gong)業(ye)自動化、醫(yi)(yi)學研究、生物醫(yi)(yi)療(liao)等(deng)領(ling)域中(zhong)(zhong)發揮著重(zhong)要的(de)(de)(de)作用(yong)。然(ran)而在上述(shu)應用(yong)領(ling)域，許多(duo)場(chang)合(he)需在某一(yi)狹小空(kong)間中(zhong)(zhong)對某一(yi)點(dian)接(jie)觸物體(ti)間的(de)(de)(de)壓(ya)力或(huo)集中(zhong)(zhong)力進行檢(jian)測(ce)(ce)，例(li)如(ru)點(dian)接(jie)觸物體(ti)間在運動過(guo)程(cheng)中(zhong)(zhong)摩擦力相(xiang)互(hu)作用(yong)過(guo)程(cheng)的(de)(de)(de)研究、例(li)如(ru)檢(jian)測(ce)(ce)空(kong)間凸輪與滾子從動件(jian)處于點(dian)接(jie)觸狀態下的(de)(de)(de)相(xiang)互(hu)作用(yong)力、檢(jian)測(ce)(ce)某一(yi)對牙齒嚙合(he)時的(de)(de)(de)相(xiang)互(hu)作用(yong)力等(deng)。由于受到傳(chuan)(chuan)感(gan)器(qi)重(zhong)量、體(ti)積以(yi)及(ji)(ji)工(gong)(gong)作空(kong)間(如(ru)狹縫)的(de)(de)(de)限制(zhi)，這時傳(chuan)(chuan)統壓(ya)力傳(chuan)(chuan)感(gan)器(qi)便不能用(yong)于上述(shu)場(chang)合(he)下的(de)(de)(de)使用(yong)來檢(jian)測(ce)(ce)某一(yi)點(dian)接(jie)觸物體(ti)間的(de)(de)(de)壓(ya)力或(huo)集中(zhong)(zhong)力。即便勉強使用(yong)，也不能滿足操作便捷的(de)(de)(de)要求(qiu)，

發明內容

本(ben)(ben)發明針對(dui)傳(chuan)統壓力傳(chuan)感器(qi)(qi)(qi)不能對(dui)某一點接觸(chu)物體(ti)間(jian)(jian)壓力進行(xing)檢(jian)(jian)測(ce)、體(ti)積(ji)大、重(zhong)(zhong)量(liang)(liang)重(zhong)(zhong)、操(cao)作(zuo)不方(fang)便(bian)的缺點；提(ti)供了一種能夠檢(jian)(jian)測(ce)出某一點接觸(chu)物體(ti)間(jian)(jian)壓力的柔性單點力片式傳(chuan)感器(qi)(qi)(qi)，該(gai)傳(chuan)感器(qi)(qi)(qi)具有(you)體(ti)積(ji)小、重(zhong)(zhong)量(liang)(liang)輕(qing)、制作(zuo)簡(jian)單、可(ke)低成本(ben)(ben)批量(liang)(liang)化生產的特點，并且可(ke)重(zhong)(zhong)復(fu)使用、操(cao)作(zuo)簡(jian)便(bian)。

本發(fa)明的另一(yi)個(ge)目的是提供一(yi)種該傳感(gan)器的制造(zao)方法(fa)。

為達到上述目(mu)的(de)，本(ben)發明是采(cai)取如下(xia)技術方案予以實現的(de)：

一種柔性單點力片(pian)式傳(chuan)感器，包(bao)括壓敏(min)(min)(min)體(ti)(ti)、分別設(she)置在壓敏(min)(min)(min)體(ti)(ti)上(shang)(shang)下(xia)(xia)端面的(de)(de)(de)兩(liang)個(ge)電(dian)極(ji)連(lian)(lian)接(jie)(jie)(jie)(jie)片(pian)，其(qi)特征(zheng)在于，還包(bao)括有(you)(you)(you)形狀大(da)小(xiao)相同(tong)的(de)(de)(de)上(shang)(shang)基(ji)(ji)(ji)(ji)(ji)板(ban)和下(xia)(xia)基(ji)(ji)(ji)(ji)(ji)板(ban)，上(shang)(shang)、下(xia)(xia)基(ji)(ji)(ji)(ji)(ji)板(ban)之間由粘接(jie)(jie)(jie)(jie)層封接(jie)(jie)(jie)(jie)；在上(shang)(shang)基(ji)(ji)(ji)(ji)(ji)板(ban)長(chang)度方向的(de)(de)(de)一側(ce)設(she)置有(you)(you)(you)一凸起(qi)；在相對該凸起(qi)的(de)(de)(de)下(xia)(xia)基(ji)(ji)(ji)(ji)(ji)板(ban)上(shang)(shang)設(she)置有(you)(you)(you)一凹(ao)陷，該凹(ao)陷與(yu)所述凸起(qi)之間形成一個(ge)密閉的(de)(de)(de)壓敏(min)(min)(min)體(ti)(ti)室，其(qi)中封裝有(you)(you)(you)所述的(de)(de)(de)壓敏(min)(min)(min)體(ti)(ti)及電(dian)極(ji)連(lian)(lian)接(jie)(jie)(jie)(jie)片(pian)，所述壓敏(min)(min)(min)體(ti)(ti)室的(de)(de)(de)大(da)小(xiao)剛好與(yu)壓敏(min)(min)(min)體(ti)(ti)的(de)(de)(de)大(da)小(xiao)吻合；所述下(xia)(xia)基(ji)(ji)(ji)(ji)(ji)板(ban)1沿(yan)其(qi)長(chang)度方向設(she)置有(you)(you)(you)兩(liang)條(tiao)相互平(ping)行的(de)(de)(de)印刷(shua)電(dian)極(ji)6，每個(ge)印刷(shua)電(dian)極(ji)分別連(lian)(lian)接(jie)(jie)(jie)(jie)位于壓敏(min)(min)(min)體(ti)(ti)上(shang)(shang)或(huo)下(xia)(xia)端面的(de)(de)(de)電(dian)極(ji)連(lian)(lian)接(jie)(jie)(jie)(jie)片(pian)9和伸(shen)出(chu)(chu)下(xia)(xia)基(ji)(ji)(ji)(ji)(ji)板(ban)的(de)(de)(de)電(dian)極(ji)引出(chu)(chu)片(pian)3；所述下(xia)(xia)基(ji)(ji)(ji)(ji)(ji)板(ban)上(shang)(shang)的(de)(de)(de)兩(liang)條(tiao)印刷(shua)電(dian)極(ji)6從連(lian)(lian)接(jie)(jie)(jie)(jie)電(dian)極(ji)連(lian)(lian)接(jie)(jie)(jie)(jie)片(pian)9到連(lian)(lian)接(jie)(jie)(jie)(jie)電(dian)極(ji)引出(chu)(chu)片(pian)3一段的(de)(de)(de)上(shang)(shang)表面設(she)置有(you)(you)(you)電(dian)極(ji)保(bao)護(hu)膜(mo)。

一(yi)種(zhong)上述柔性單點力片式傳感器的制造方法，其特(te)征在于，包括如下步驟：

a.先制(zhi)備形狀大小相同的上基(ji)板(ban)(ban)和下基(ji)板(ban)(ban)，在(zai)上基(ji)板(ban)(ban)長度方(fang)向(xiang)的一側設(she)置一凸(tu)起(qi)；在(zai)相對該凸(tu)起(qi)的下基(ji)板(ban)(ban)上設(she)置一凹陷；

b.將(jiang)下基板1固定在(zai)絲網印(yin)(yin)刷(shua)(shua)機的印(yin)(yin)刷(shua)(shua)臺上，用導(dao)電(dian)料(liao)漿沿(yan)下基板長度方向(xiang)從遠離(li)凹陷(xian)一側到凹陷(xian)的上表(biao)面(mian)印(yin)(yin)制(zhi)兩條印(yin)(yin)刷(shua)(shua)電(dian)極(ji)，干燥后，在(zai)下基板遠離(li)凹陷(xian)的一側設置兩個外露的電(dian)極(ji)引出片3。

c.在(zai)下基板(ban)凹陷中涂(tu)敷(fu)壓(ya)敏(min)電(dian)阻(zu)油(you)墨(mo)(mo)，并(bing)放置一(yi)個壓(ya)敏(min)體，該(gai)壓(ya)敏(min)體上(shang)、下端(duan)面(mian)事先分別焊接(jie)好兩個電(dian)極(ji)連(lian)(lian)接(jie)片9，位于(yu)(yu)壓(ya)敏(min)體上(shang)、下端(duan)面(mian)的(de)(de)(de)(de)兩電(dian)極(ji)連(lian)(lian)接(jie)片9分別連(lian)(lian)接(jie)至位于(yu)(yu)下基板(ban)上(shang)的(de)(de)(de)(de)兩條印刷電(dian)極(ji)6的(de)(de)(de)(de)一(yi)端(duan)，兩條印刷電(dian)極(ji)6的(de)(de)(de)(de)另一(yi)端(duan)連(lian)(lian)接(jie)外(wai)露的(de)(de)(de)(de)兩個電(dian)極(ji)引出片3；同時，在(zai)上(shang)基板(ban)4的(de)(de)(de)(de)凸起內(nei)表面(mian)上(shang)涂(tu)敷(fu)壓(ya)敏(min)電(dian)阻(zu)油(you)墨(mo)(mo)。

d.在(zai)下基板的(de)兩條印(yin)刷電極6上(shang)從連接(jie)電極連接(jie)片9到連接(jie)電極引出(chu)片3的(de)一段(duan)上(shang)表面涂敷一層電極保護膜(mo)并干燥。

e.將上、下基板用粘接層復(fu)合，使所述凸起(qi)與(yu)凹陷之間形成一個(ge)的(de)密閉壓(ya)敏體(ti)室，將壓(ya)敏體(ti)及電極(ji)(ji)連接片(pian)封裝在其內，壓(ya)敏體(ti)室的(de)大小(xiao)剛好與(yu)壓(ya)敏體(ti)的(de)大小(xiao)吻合，同(tong)時兩條印刷(shua)電極(ji)(ji)相互平行。

以上(shang)方法中，所述的(de)印刷電(dian)極用(yong)(yong)(yong)導電(dian)漿料(liao)(liao)為銀導電(dian)漿料(liao)(liao)；所述的(de)電(dian)極保(bao)護膜材(cai)料(liao)(liao)采(cai)用(yong)(yong)(yong)羥(qian)乙基(ji)纖(xian)維素(su)；所述的(de)壓敏電(dian)阻(zu)油墨采(cai)用(yong)(yong)(yong)碳二(er)硫化鉬油墨；所述的(de)上(shang)、下基(ji)板采(cai)用(yong)(yong)(yong)聚氯乙烯材(cai)料(liao)(liao)制成(cheng)矩形基(ji)片；所述的(de)粘接層采(cai)用(yong)(yong)(yong)環氧樹(shu)脂。

本發明(ming)的(de)(de)柔性單點(dian)力片(pian)式傳(chuan)感器不需(xu)要外加保護裝置，不用(yong)將壓敏(min)電(dian)阻直接置入被(bei)測(ce)對(dui)象內部，只需(xu)將被(bei)測(ce)對(dui)象的(de)(de)點(dian)接觸(chu)部位與壓敏(min)電(dian)阻所對(dui)應的(de)(de)壓敏(min)體室的(de)(de)聚(ju)(ju)氯乙烯(xi)PVC絕(jue)緣基片(pian)直接接觸(chu)即可；同(tong)時(shi)壓敏(min)電(dian)阻材料在工作過(guo)程中(zhong)始終(zhong)受到了(le)聚(ju)(ju)氯乙烯(xi)PVC片(pian)的(de)(de)絕(jue)緣保護。由于(yu)兩條銀導電(dian)電(dian)極(ji)均處于(yu)羥乙基纖(xian)維素HEC的(de)(de)絕(jue)緣保護下，可有(you)效(xiao)防(fang)止兩電(dian)極(ji)間(jian)(jian)間(jian)(jian)距太小(xiao)而引起的(de)(de)電(dian)子遷移所造成的(de)(de)電(dian)極(ji)間(jian)(jian)短路現象。該柔性單點(dian)力片(pian)式傳(chuan)感器只有(you)電(dian)極(ji)引出片(pian)部分區域(yu)外露(lu)，因此具有(you)抗強(qiang)干擾(rao)的(de)(de)優點(dian)。

本發明(ming)采用(yong)基于絲網印刷工藝的(de)(de)制(zhi)造方法，使(shi)制(zhi)得(de)的(de)(de)單(dan)點(dian)力傳感(gan)器具(ju)有(you)重(zhong)量(liang)輕(qing)、體積(ji)小(xiao)(片狀)、成本低(di)、制(zhi)作簡單(dan)、可批量(liang)化(hua)生產的(de)(de)特(te)點(dian)，并可重(zhong)復使(shi)用(yong)、操作便捷。該傳感(gan)器可應用(yong)于工作空間(jian)狹小(xiao)的(de)(de)某一點(dian)接觸物體間(jian)的(de)(de)壓(ya)力或集中力的(de)(de)檢測以及類(lei)似特(te)殊應用(yong)場合。

附圖說明

圖(tu)1為本發(fa)明柔性單(dan)點力片(pian)(pian)式傳感器結構示(shi)意圖(tu)。圖(tu)中：1、下基板；2、粘接層(ceng)；3、電極引(yin)出片(pian)(pian)；4、上(shang)基板；5、電極保護膜；6、印刷電極；7、壓(ya)敏體(ti)。

圖(tu)(tu)2為圖(tu)(tu)1的俯視(shi)其(qi)及(ji)印刷(shua)電(dian)(dian)極(ji)的局部剖視(shi)圖(tu)(tu)。圖(tu)(tu)中：8、上(shang)基(ji)板凸起；9、電(dian)(dian)極(ji)連接(jie)片。

圖3為圖2的剖面圖。圖中：10、下(xia)基(ji)板凹陷。

圖(tu)4為本發明(ming)柔性單(dan)點力片(pian)式傳感器一個應用(yong)實例的測(ce)量(liang)電路原理圖(tu)。

具體實施方(fang)式(shi)

下(xia)面(mian)結(jie)合(he)附圖及實(shi)施(shi)例對本發明(ming)作(zuo)進一(yi)步的詳細(xi)說明(ming)。

如圖(tu)1-圖(tu)3所示(shi)，一(yi)種(zhong)柔性單點力片(pian)(pian)(pian)式傳感器，包括上(shang)(shang)基(ji)(ji)(ji)(ji)板(ban)(ban)4和下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)(ban)1、壓敏體(ti)(ti)7、設(she)置在(zai)壓敏體(ti)(ti)7垂(chui)直兩端(duan)面的(de)兩個電(dian)(dian)極(ji)連(lian)接(jie)片(pian)(pian)(pian)9，上(shang)(shang)、下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)(ban)之間由環(huan)氧樹(shu)脂粘接(jie)層2封接(jie)；上(shang)(shang)、下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)(ban)4、1可由聚(ju)氯乙(yi)(yi)烯(PVC)制(zhi)成(cheng)相同大(da)(da)小(xiao)尺寸的(de)矩形(xing)基(ji)(ji)(ji)(ji)片(pian)(pian)(pian)；在(zai)靠近上(shang)(shang)基(ji)(ji)(ji)(ji)板(ban)(ban)4長度(du)方向的(de)左側設(she)置有(you)一(yi)凸起8；在(zai)相對該凸起8的(de)下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)(ban)上(shang)(shang)設(she)置有(you)一(yi)凹(ao)陷(xian)10，該凹(ao)陷(xian)與凸起之間形(xing)成(cheng)一(yi)個的(de)密閉壓敏體(ti)(ti)室，其(qi)中封裝有(you)壓敏體(ti)(ti)7及電(dian)(dian)極(ji)連(lian)接(jie)片(pian)(pian)(pian)9，壓敏體(ti)(ti)室的(de)大(da)(da)小(xiao)剛好與壓敏體(ti)(ti)7的(de)大(da)(da)小(xiao)吻合，壓敏體(ti)(ti)7為圓片(pian)(pian)(pian)或方塊形(xing)壓敏電(dian)(dian)阻；下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)(ban)1上(shang)(shang)設(she)置有(you)兩條沿其(qi)長度(du)方向相互平(ping)行的(de)印(yin)(yin)刷電(dian)(dian)極(ji)6，印(yin)(yin)刷電(dian)(dian)極(ji)6為銀導(dao)電(dian)(dian)帶狀(zhuang)薄膜。每條印(yin)(yin)刷電(dian)(dian)極(ji)在(zai)凹(ao)陷(xian)右邊沿處的(de)一(yi)端(duan)連(lian)接(jie)一(yi)個電(dian)(dian)極(ji)連(lian)接(jie)片(pian)(pian)(pian)9；遠離(li)凹(ao)陷(xian)到下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)(ban)1右側處的(de)另一(yi)端(duan)連(lian)接(jie)一(yi)個電(dian)(dian)極(ji)引(yin)出(chu)(chu)片(pian)(pian)(pian)3，該電(dian)(dian)極(ji)引(yin)出(chu)(chu)片(pian)(pian)(pian)3外露下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)(ban)右側；印(yin)(yin)刷電(dian)(dian)極(ji)6從連(lian)接(jie)電(dian)(dian)極(ji)連(lian)接(jie)片(pian)(pian)(pian)9到連(lian)接(jie)電(dian)(dian)極(ji)引(yin)出(chu)(chu)片(pian)(pian)(pian)3的(de)一(yi)段上(shang)(shang)表面設(she)置有(you)電(dian)(dian)極(ji)保護膜5，該電(dian)(dian)極(ji)保護膜為羥乙(yi)(yi)基(ji)(ji)(ji)(ji)纖維素(HEC)膜層。

以上柔性單點力(li)片式傳感器制造方法(fa)，包括(kuo)下(xia)述步驟：

a.先制備(bei)形狀大小相同的上基(ji)板(ban)(ban)和下(xia)基(ji)板(ban)(ban)，在上基(ji)板(ban)(ban)長度方向的一側(ce)設置一凸起；在相對該凸起的下(xia)基(ji)板(ban)(ban)上設置一凹陷；

b.將下(xia)(xia)基(ji)板(ban)1固定在絲網印刷機(ji)的(de)(de)印刷臺上(shang)，用導電(dian)料漿沿下(xia)(xia)基(ji)板(ban)長度方向(xiang)從(cong)遠離凹陷一(yi)側(ce)到凹陷的(de)(de)上(shang)表(biao)面印制(zhi)兩(liang)條印刷電(dian)極，干燥后(hou)，在下(xia)(xia)基(ji)板(ban)遠離凹陷的(de)(de)一(yi)側(ce)設置兩(liang)個外露的(de)(de)電(dian)極引出片(pian)3。

c.在(zai)下(xia)基(ji)板凹陷中涂敷壓(ya)敏(min)電(dian)阻(zu)油(you)墨，并放置一個(ge)(ge)壓(ya)敏(min)體，該壓(ya)敏(min)體上(shang)、下(xia)端(duan)面事先分別(bie)焊接(jie)(jie)好(hao)兩(liang)個(ge)(ge)電(dian)極(ji)連接(jie)(jie)片9，位于(yu)(yu)壓(ya)敏(min)體上(shang)、下(xia)端(duan)面的(de)兩(liang)電(dian)極(ji)連接(jie)(jie)片9分別(bie)連接(jie)(jie)至位于(yu)(yu)下(xia)基(ji)板上(shang)的(de)兩(liang)條印刷電(dian)極(ji)6，兩(liang)條印刷電(dian)極(ji)6的(de)另一端(duan)連接(jie)(jie)外露的(de)兩(liang)個(ge)(ge)電(dian)極(ji)引(yin)出片3；同(tong)時(shi)，在(zai)上(shang)基(ji)板4的(de)凸(tu)起內表(biao)面上(shang)涂敷壓(ya)敏(min)電(dian)阻(zu)油(you)墨。

d.在下基板的兩條印刷(shua)電(dian)極6上(shang)從連接電(dian)極連接片9到連接電(dian)極引(yin)出片3的一段上(shang)表面涂敷一層電(dian)極保護膜(mo)并(bing)干燥。

e.將上(shang)、下基(ji)板用粘接(jie)層復合，使所(suo)述凸(tu)起(qi)與凹陷之間形成一個的(de)密閉(bi)壓(ya)敏體室(shi)，將壓(ya)敏體及電極(ji)連接(jie)片封裝在其內，壓(ya)敏體室(shi)的(de)大(da)小剛(gang)好與壓(ya)敏體的(de)大(da)小吻合，同時兩條(tiao)印刷電極(ji)相互平(ping)行。

當(dang)上述絲網(wang)印刷(shua)單點力片式傳感器(qi)與外(wai)接(jie)電(dian)路連接(jie)并通(tong)過能(neng)正常工作的測(ce)試(shi)后，該(gai)傳感器(qi)外(wai)露部分電(dian)極(ji)引出片3與外(wai)接(jie)導線(xian)連接(jie)部分用(yong)絕緣硅膠將其覆蓋以(yi)防銀電(dian)極(ji)長(chang)期(qi)處于在(zai)空氣(qi)中被氧(yang)化而(er)削弱或喪失了其導電(dian)性能(neng)。

本(ben)發明柔性(xing)單點(dian)力(li)(li)片式傳感器的(de)檢測原理如下：當處(chu)于(yu)(yu)點(dian)接(jie)觸狀態時物(wu)體間(jian)的(de)一集(ji)中(zhong)(zhong)載(zai)荷(he)(集(ji)中(zhong)(zhong)力(li)(li))作用(yong)于(yu)(yu)壓(ya)敏(min)電(dian)阻(zu)(zu)7上時，壓(ya)敏(min)電(dian)阻(zu)(zu)因受到了壓(ya)力(li)(li)作用(yong)便(bian)發生了一定(ding)的(de)壓(ya)縮變(bian)形，從而引起(qi)了壓(ya)敏(min)電(dian)阻(zu)(zu)值的(de)變(bian)化(hua)(hua)，反映(ying)在電(dian)路上便(bian)是兩銀(yin)導電(dian)電(dian)極(ji)6之間(jian)電(dian)壓(ya)值的(de)改變(bian)；根據壓(ya)敏(min)電(dian)阻(zu)(zu)上電(dian)壓(ya)值相對于(yu)(yu)最初電(dian)壓(ya)值的(de)變(bian)化(hua)(hua)量便(bian)可反映(ying)出點(dian)接(jie)觸處(chu)壓(ya)力(li)(li)或(huo)集(ji)中(zhong)(zhong)載(zai)荷(he)的(de)大小。集(ji)中(zhong)(zhong)載(zai)荷(he)與軸(zhou)向長度、電(dian)阻(zu)(zu)阻(zu)(zu)值與軸(zhou)向長度的(de)關(guan)系、電(dian)壓(ya)與電(dian)阻(zu)(zu)的(de)關(guan)系如下：

ΔL=FLES---(1)

其(qi)中：L——壓敏電阻的原(yuan)始(shi)厚度(du)；

S——壓敏電阻的橫截面(mian)面(mian)積；

F——作(zuo)用于(yu)壓敏電阻(zu)上(shang)的(de)集中(zhong)載荷；

E——壓敏電阻(zu)的彈性模量；

ΔL——壓敏(min)電阻油墨厚度的(de)改變量。

R=ρLS---(2)

其中：L——壓敏(min)電阻(zu)油墨的(de)厚度；

S——壓敏(min)電阻油墨的橫截(jie)面(mian)面(mian)積；

ρ——壓敏電(dian)阻油墨(mo)的電(dian)阻率；

R——壓敏電阻(zu)油(you)墨的電阻(zu)值。

                U＝IR        (3)

其中(zhong)：I——流經(jing)壓敏電阻(zu)的電流值；

R——壓敏電阻油墨的電阻值；

U——壓敏(min)電阻(zu)油(you)墨的電壓值；

如圖4所示(shi)，絲網印刷單(dan)點力(li)片式傳(chuan)感器(qi)的(de)(de)(de)(de)(de)(de)(de)(de)壓(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)因(yin)為只受到軸向(xiang)壓(ya)(ya)(ya)縮變(bian)(bian)(bian)形(xing)而引(yin)起(qi)(qi)了(le)(le)(le)其阻(zu)值(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)(bian)(bian)，因(yin)此(ci)在測量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)壓(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)可(ke)以被(bei)當作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)的(de)(de)(de)(de)(de)(de)(de)(de)可(ke)變(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)對待；同時又由(you)(you)于壓(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)(bian)(bian)引(yin)起(qi)(qi)了(le)(le)(le)加在壓(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)兩(liang)端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)(bian)(bian)，因(yin)此(ci)壓(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)(bian)(bian)可(ke)以被(bei)當作(zuo)(zuo)檢測電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)(de)(de)(de)(de)(de)輸入變(bian)(bian)(bian)量(liang)信(xin)號(hao)。由(you)(you)于單(dan)點力(li)傳(chuan)感器(qi)的(de)(de)(de)(de)(de)(de)(de)(de)壓(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)因(yin)外力(li)作(zuo)(zuo)用(yong)(yong)而引(yin)起(qi)(qi)了(le)(le)(le)加在其兩(liang)端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)(bian)(bian)，反相比(bi)(bi)例(li)放(fang)(fang)大電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)(de)(de)(de)(de)(de)輸入端恰好是(shi)壓(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)(bian)(bian)端；因(yin)此(ci)壓(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)(bian)(bian)必(bi)然(ran)(ran)引(yin)起(qi)(qi)了(le)(le)(le)反相比(bi)(bi)例(li)放(fang)(fang)大電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)I輸出電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)(bian)(bian)，也就是(shi)說(shuo)單(dan)點力(li)傳(chuan)感器(qi)受外力(li)作(zuo)(zuo)用(yong)(yong)是(shi)可(ke)以引(yin)起(qi)(qi)測量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)相應電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)(bian)(bian)的(de)(de)(de)(de)(de)(de)(de)(de)。當外力(li)作(zuo)(zuo)用(yong)(yong)于單(dan)點力(li)傳(chuan)感器(qi)后(hou)由(you)(you)于壓(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)值(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)(bian)(bian)而產生了(le)(le)(le)一定的(de)(de)(de)(de)(de)(de)(de)(de)微弱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)號(hao)，通(tong)過(guo)(guo)(guo)反相比(bi)(bi)例(li)放(fang)(fang)大器(qi)I將該信(xin)號(hao)放(fang)(fang)大；然(ran)(ran)后(hou)再(zai)(zai)通(tong)過(guo)(guo)(guo)低(di)通(tong)濾波(bo)器(qi)將其他高頻干擾(rao)信(xin)號(hao)過(guo)(guo)(guo)濾或(huo)(huo)者(zhe)去(qu)除；接(jie)著再(zai)(zai)通(tong)過(guo)(guo)(guo)反相比(bi)(bi)例(li)放(fang)(fang)大器(qi)II將電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)號(hao)還原到最初的(de)(de)(de)(de)(de)(de)(de)(de)相位(因(yin)為前后(hou)經過(guo)(guo)(guo)了(le)(le)(le)兩(liang)次(ci)反相放(fang)(fang)大，因(yin)此(ci)經過(guo)(guo)(guo)處理后(hou)的(de)(de)(de)(de)(de)(de)(de)(de)信(xin)號(hao)可(ke)以恢復(fu)到原來的(de)(de)(de)(de)(de)(de)(de)(de)正電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)，同時將微弱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)號(hao)值(zhi)放(fang)(fang)大了(le)(le)(le))；最后(hou)再(zai)(zai)通(tong)過(guo)(guo)(guo)A/D轉(zhuan)換器(qi)限(xian)壓(ya)(ya)(ya)轉(zhuan)換將外力(li)引(yin)起(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)并經過(guo)(guo)(guo)處理的(de)(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)號(hao)轉(zhuan)換為計算機能識別(bie)的(de)(de)(de)(de)(de)(de)(de)(de)數字(zi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)信(xin)號(hao)，當然(ran)(ran)也可(ke)以直接(jie)將反相比(bi)(bi)例(li)放(fang)(fang)大器(qi)II處理后(hou)的(de)(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)信(xin)號(hao)直接(jie)輸入至可(ke)以接(jie)收該信(xin)號(hao)的(de)(de)(de)(de)(de)(de)(de)(de)模(mo)擬顯示(shi)儀器(qi)或(huo)(huo)處理儀器(qi)例(li)如模(mo)擬信(xin)號(hao)示(shi)波(bo)顯示(shi)器(qi)或(huo)(huo)者(zhe)模(mo)擬信(xin)號(hao)處理電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)板。