技術領域

本發明涉(she)及一(yi)種(zhong)傳感器及其制造(zao)方法，特別涉(she)及一(yi)種(zhong)用(yong)于在某(mou)一(yi)狹小接(jie)觸(chu)區域中對一(yi)點接(jie)觸(chu)物體(ti)間(jian)的(de)壓力(li)或集(ji)中力(li)進行檢(jian)測(ce)的(de)柔性(xing)單點力(li)片式(shi)傳感器及其制造(zao)方法。

背景技術

壓(ya)力(li)(li)傳(chuan)(chuan)感(gan)(gan)器及檢(jian)(jian)(jian)測(ce)(ce)技(ji)術(shu)在(zai)(zai)(zai)航空航天、軍事工(gong)業、汽車、船舶(bo)制造、工(gong)業自動化、醫學(xue)研(yan)(yan)究、生物(wu)醫療等領域(yu)中發揮著重(zhong)要(yao)的(de)(de)作(zuo)用(yong)。然而(er)在(zai)(zai)(zai)上述(shu)應用(yong)領域(yu)，許多場(chang)合(he)(he)需(xu)在(zai)(zai)(zai)某一(yi)狹小空間(jian)(jian)中對(dui)某一(yi)點(dian)接(jie)觸(chu)物(wu)體(ti)(ti)間(jian)(jian)的(de)(de)壓(ya)力(li)(li)或集中力(li)(li)進行檢(jian)(jian)(jian)測(ce)(ce)，例(li)如點(dian)接(jie)觸(chu)物(wu)體(ti)(ti)間(jian)(jian)在(zai)(zai)(zai)運(yun)動過程中摩擦力(li)(li)相互(hu)作(zuo)用(yong)過程的(de)(de)研(yan)(yan)究、例(li)如檢(jian)(jian)(jian)測(ce)(ce)空間(jian)(jian)凸輪與滾子(zi)從動件處于點(dian)接(jie)觸(chu)狀態下的(de)(de)相互(hu)作(zuo)用(yong)力(li)(li)、檢(jian)(jian)(jian)測(ce)(ce)某一(yi)對(dui)牙齒嚙合(he)(he)時(shi)的(de)(de)相互(hu)作(zuo)用(yong)力(li)(li)等。由(you)于受到傳(chuan)(chuan)感(gan)(gan)器重(zhong)量、體(ti)(ti)積以及工(gong)作(zuo)空間(jian)(jian)(如狹縫)的(de)(de)限(xian)制，這時(shi)傳(chuan)(chuan)統壓(ya)力(li)(li)傳(chuan)(chuan)感(gan)(gan)器便不(bu)能用(yong)于上述(shu)場(chang)合(he)(he)下的(de)(de)使用(yong)來(lai)檢(jian)(jian)(jian)測(ce)(ce)某一(yi)點(dian)接(jie)觸(chu)物(wu)體(ti)(ti)間(jian)(jian)的(de)(de)壓(ya)力(li)(li)或集中力(li)(li)。即便勉強使用(yong)，也不(bu)能滿足操作(zuo)便捷的(de)(de)要(yao)求，

發明內容

本(ben)發明針對傳(chuan)(chuan)統壓(ya)力(li)傳(chuan)(chuan)感器(qi)不能對某一點(dian)接(jie)觸物體(ti)間壓(ya)力(li)進行檢(jian)(jian)測(ce)、體(ti)積(ji)大、重量(liang)重、操作(zuo)(zuo)不方(fang)便(bian)的(de)缺點(dian)；提供了一種能夠(gou)檢(jian)(jian)測(ce)出某一點(dian)接(jie)觸物體(ti)間壓(ya)力(li)的(de)柔(rou)性(xing)單點(dian)力(li)片(pian)式(shi)傳(chuan)(chuan)感器(qi)，該傳(chuan)(chuan)感器(qi)具有體(ti)積(ji)小、重量(liang)輕(qing)、制(zhi)作(zuo)(zuo)簡單、可(ke)低成(cheng)本(ben)批量(liang)化生產的(de)特(te)點(dian)，并且可(ke)重復使用、操作(zuo)(zuo)簡便(bian)。

本發明的另一個(ge)目(mu)的是(shi)提供一種該傳感器的制(zhi)造方法(fa)。

為達到上述目的(de)，本發(fa)明是采取如下技術(shu)方案予以實(shi)現的(de)：

一(yi)種柔性(xing)單(dan)點力片(pian)(pian)式傳感器，包(bao)括(kuo)(kuo)壓敏(min)體(ti)、分別設(she)置(zhi)在壓敏(min)體(ti)上(shang)(shang)(shang)下(xia)端(duan)面(mian)的兩(liang)個電(dian)極(ji)(ji)(ji)連(lian)接片(pian)(pian)，其(qi)特征在于，還包(bao)括(kuo)(kuo)有(you)形狀(zhuang)大(da)小(xiao)相(xiang)同的上(shang)(shang)(shang)基(ji)(ji)板(ban)(ban)(ban)和下(xia)基(ji)(ji)板(ban)(ban)(ban)，上(shang)(shang)(shang)、下(xia)基(ji)(ji)板(ban)(ban)(ban)之間(jian)由粘接層封(feng)接；在上(shang)(shang)(shang)基(ji)(ji)板(ban)(ban)(ban)長度(du)方向(xiang)的一(yi)側設(she)置(zhi)有(you)一(yi)凸(tu)起；在相(xiang)對該(gai)凸(tu)起的下(xia)基(ji)(ji)板(ban)(ban)(ban)上(shang)(shang)(shang)設(she)置(zhi)有(you)一(yi)凹(ao)陷(xian)，該(gai)凹(ao)陷(xian)與所述凸(tu)起之間(jian)形成一(yi)個密閉的壓敏(min)體(ti)室，其(qi)中封(feng)裝有(you)所述的壓敏(min)體(ti)及電(dian)極(ji)(ji)(ji)連(lian)接片(pian)(pian)，所述壓敏(min)體(ti)室的大(da)小(xiao)剛好與壓敏(min)體(ti)的大(da)小(xiao)吻合；所述下(xia)基(ji)(ji)板(ban)(ban)(ban)1沿其(qi)長度(du)方向(xiang)設(she)置(zhi)有(you)兩(liang)條相(xiang)互平行(xing)的印刷(shua)電(dian)極(ji)(ji)(ji)6，每個印刷(shua)電(dian)極(ji)(ji)(ji)分別連(lian)接位于壓敏(min)體(ti)上(shang)(shang)(shang)或(huo)下(xia)端(duan)面(mian)的電(dian)極(ji)(ji)(ji)連(lian)接片(pian)(pian)9和伸出下(xia)基(ji)(ji)板(ban)(ban)(ban)的電(dian)極(ji)(ji)(ji)引出片(pian)(pian)3；所述下(xia)基(ji)(ji)板(ban)(ban)(ban)上(shang)(shang)(shang)的兩(liang)條印刷(shua)電(dian)極(ji)(ji)(ji)6從連(lian)接電(dian)極(ji)(ji)(ji)連(lian)接片(pian)(pian)9到連(lian)接電(dian)極(ji)(ji)(ji)引出片(pian)(pian)3一(yi)段(duan)的上(shang)(shang)(shang)表面(mian)設(she)置(zhi)有(you)電(dian)極(ji)(ji)(ji)保護(hu)膜。

一種上述柔性單點力片式傳感器的(de)制造方法，其(qi)特征(zheng)在(zai)于，包括(kuo)如下步驟(zou)：

a.先制備形狀大小相同的上基(ji)(ji)板和下基(ji)(ji)板，在(zai)上基(ji)(ji)板長度方(fang)向的一側(ce)設置一凸起(qi)；在(zai)相對該(gai)凸起(qi)的下基(ji)(ji)板上設置一凹陷；

b.將下(xia)基(ji)板(ban)(ban)1固(gu)定在絲網印(yin)刷機的(de)印(yin)刷臺(tai)上，用(yong)導電(dian)料(liao)漿沿下(xia)基(ji)板(ban)(ban)長度方向從遠離凹(ao)陷(xian)(xian)一(yi)側(ce)到凹(ao)陷(xian)(xian)的(de)上表面印(yin)制(zhi)兩(liang)條印(yin)刷電(dian)極，干燥后(hou)，在下(xia)基(ji)板(ban)(ban)遠離凹(ao)陷(xian)(xian)的(de)一(yi)側(ce)設(she)置(zhi)兩(liang)個外露(lu)的(de)電(dian)極引出片(pian)3。

c.在(zai)下(xia)(xia)基板凹陷(xian)中涂敷(fu)壓(ya)(ya)敏(min)電(dian)阻油墨，并(bing)放(fang)置一(yi)個壓(ya)(ya)敏(min)體(ti)(ti)，該壓(ya)(ya)敏(min)體(ti)(ti)上、下(xia)(xia)端(duan)面(mian)事先分(fen)別焊(han)接(jie)好兩(liang)個電(dian)極(ji)連(lian)接(jie)片9，位于(yu)壓(ya)(ya)敏(min)體(ti)(ti)上、下(xia)(xia)端(duan)面(mian)的(de)(de)兩(liang)電(dian)極(ji)連(lian)接(jie)片9分(fen)別連(lian)接(jie)至位于(yu)下(xia)(xia)基板上的(de)(de)兩(liang)條印刷(shua)電(dian)極(ji)6的(de)(de)一(yi)端(duan)，兩(liang)條印刷(shua)電(dian)極(ji)6的(de)(de)另(ling)一(yi)端(duan)連(lian)接(jie)外露的(de)(de)兩(liang)個電(dian)極(ji)引出(chu)片3；同時，在(zai)上基板4的(de)(de)凸起(qi)內表面(mian)上涂敷(fu)壓(ya)(ya)敏(min)電(dian)阻油墨。

d.在下基板(ban)的兩條印刷電(dian)極(ji)(ji)6上從連接(jie)電(dian)極(ji)(ji)連接(jie)片9到(dao)連接(jie)電(dian)極(ji)(ji)引出片3的一段上表(biao)面(mian)涂(tu)敷一層電(dian)極(ji)(ji)保護膜并干燥。

e.將(jiang)上、下基板用粘接(jie)層復合(he)(he)，使(shi)所述凸起與(yu)凹(ao)陷之間形成一(yi)個的(de)密閉壓(ya)敏(min)(min)體室，將(jiang)壓(ya)敏(min)(min)體及電(dian)極(ji)(ji)連接(jie)片(pian)封裝在其內，壓(ya)敏(min)(min)體室的(de)大小剛好與(yu)壓(ya)敏(min)(min)體的(de)大小吻(wen)合(he)(he)，同時(shi)兩條印刷電(dian)極(ji)(ji)相互平行。

以(yi)上方法中，所(suo)述(shu)的(de)印(yin)刷(shua)電極用(yong)導(dao)(dao)電漿料(liao)為銀導(dao)(dao)電漿料(liao)；所(suo)述(shu)的(de)電極保護膜材料(liao)采用(yong)羥乙(yi)基(ji)纖維素；所(suo)述(shu)的(de)壓敏電阻油(you)墨采用(yong)碳二(er)硫化鉬油(you)墨；所(suo)述(shu)的(de)上、下基(ji)板采用(yong)聚氯乙(yi)烯材料(liao)制成矩形基(ji)片(pian)；所(suo)述(shu)的(de)粘接層采用(yong)環氧樹(shu)脂(zhi)。

本(ben)發明的(de)(de)柔性單點力(li)片(pian)式(shi)(shi)傳(chuan)感器不(bu)需要(yao)外加保(bao)(bao)護裝置(zhi)，不(bu)用將壓(ya)敏電(dian)(dian)(dian)阻直接(jie)置(zhi)入被測對(dui)(dui)象(xiang)(xiang)內部(bu)，只(zhi)需將被測對(dui)(dui)象(xiang)(xiang)的(de)(de)點接(jie)觸(chu)部(bu)位與壓(ya)敏電(dian)(dian)(dian)阻所對(dui)(dui)應的(de)(de)壓(ya)敏體室的(de)(de)聚(ju)氯乙烯(xi)PVC絕(jue)緣(yuan)基片(pian)直接(jie)接(jie)觸(chu)即可；同時壓(ya)敏電(dian)(dian)(dian)阻材料在工作過程中始終受(shou)到(dao)了(le)聚(ju)氯乙烯(xi)PVC片(pian)的(de)(de)絕(jue)緣(yuan)保(bao)(bao)護。由(you)于(yu)兩條(tiao)銀導電(dian)(dian)(dian)電(dian)(dian)(dian)極(ji)均處(chu)于(yu)羥乙基纖維素HEC的(de)(de)絕(jue)緣(yuan)保(bao)(bao)護下(xia)，可有(you)(you)效防(fang)止(zhi)兩電(dian)(dian)(dian)極(ji)間間距(ju)太小(xiao)而引起的(de)(de)電(dian)(dian)(dian)子遷移所造成的(de)(de)電(dian)(dian)(dian)極(ji)間短路現象(xiang)(xiang)。該柔性單點力(li)片(pian)式(shi)(shi)傳(chuan)感器只(zhi)有(you)(you)電(dian)(dian)(dian)極(ji)引出片(pian)部(bu)分區域外露(lu)，因此具有(you)(you)抗強干擾的(de)(de)優(you)點。

本發明采用基于絲網印刷工(gong)藝的(de)制造方法，使制得的(de)單點(dian)(dian)力傳感(gan)器(qi)具有重量(liang)輕、體積小(片狀)、成本低、制作(zuo)簡單、可批量(liang)化生產的(de)特點(dian)(dian)，并可重復使用、操作(zuo)便捷。該傳感(gan)器(qi)可應用于工(gong)作(zuo)空間(jian)(jian)狹小的(de)某(mou)一(yi)點(dian)(dian)接觸物體間(jian)(jian)的(de)壓力或(huo)集中(zhong)力的(de)檢測以及類似特殊應用場(chang)合。

附圖說明

圖(tu)1為本發(fa)明柔性單點力片式傳(chuan)感器結構示意(yi)圖(tu)。圖(tu)中：1、下基(ji)板(ban)；2、粘接層(ceng)；3、電極引出片；4、上(shang)基(ji)板(ban)；5、電極保護膜；6、印刷電極；7、壓(ya)敏體。

圖(tu)2為(wei)圖(tu)1的(de)俯視其及印刷電(dian)極的(de)局部剖視圖(tu)。圖(tu)中(zhong)：8、上基板凸起；9、電(dian)極連接片。

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

圖4為本(ben)發明柔性(xing)單點力片(pian)式(shi)傳感器一個應用實例的(de)測量電(dian)路原理(li)圖。

具體實施方式

下面結合(he)附圖及實施例對本(ben)發明(ming)作進一步的詳細說明(ming)。

如圖(tu)1-圖(tu)3所示，一種柔性單點力片(pian)式(shi)傳感器，包括上基板(ban)4和下基板(ban)1、壓(ya)敏(min)(min)(min)體(ti)7、設(she)(she)置(zhi)(zhi)在(zai)壓(ya)敏(min)(min)(min)體(ti)7垂直兩端面的(de)(de)(de)(de)(de)(de)兩個(ge)電(dian)極(ji)連(lian)接片(pian)9，上、下基板(ban)之間由環氧樹脂(zhi)粘接層2封(feng)接；上、下基板(ban)4、1可(ke)由聚氯乙(yi)烯(PVC)制成相(xiang)同大小(xiao)尺寸的(de)(de)(de)(de)(de)(de)矩形基片(pian)；在(zai)靠近上基板(ban)4長度方(fang)向的(de)(de)(de)(de)(de)(de)左側(ce)設(she)(she)置(zhi)(zhi)有一凸起(qi)8；在(zai)相(xiang)對該凸起(qi)8的(de)(de)(de)(de)(de)(de)下基板(ban)上設(she)(she)置(zhi)(zhi)有一凹陷(xian)10，該凹陷(xian)與凸起(qi)之間形成一個(ge)的(de)(de)(de)(de)(de)(de)密閉壓(ya)敏(min)(min)(min)體(ti)室(shi)，其中封(feng)裝有壓(ya)敏(min)(min)(min)體(ti)7及電(dian)極(ji)連(lian)接片(pian)9，壓(ya)敏(min)(min)(min)體(ti)室(shi)的(de)(de)(de)(de)(de)(de)大小(xiao)剛好與壓(ya)敏(min)(min)(min)體(ti)7的(de)(de)(de)(de)(de)(de)大小(xiao)吻合，壓(ya)敏(min)(min)(min)體(ti)7為圓片(pian)或方(fang)塊(kuai)形壓(ya)敏(min)(min)(min)電(dian)阻；下基板(ban)1上設(she)(she)置(zhi)(zhi)有兩條(tiao)(tiao)沿(yan)其長度方(fang)向相(xiang)互平行的(de)(de)(de)(de)(de)(de)印(yin)刷(shua)(shua)電(dian)極(ji)6，印(yin)刷(shua)(shua)電(dian)極(ji)6為銀(yin)導電(dian)帶(dai)狀薄膜。每條(tiao)(tiao)印(yin)刷(shua)(shua)電(dian)極(ji)在(zai)凹陷(xian)右(you)(you)邊沿(yan)處的(de)(de)(de)(de)(de)(de)一端連(lian)接一個(ge)電(dian)極(ji)連(lian)接片(pian)9；遠離凹陷(xian)到下基板(ban)1右(you)(you)側(ce)處的(de)(de)(de)(de)(de)(de)另一端連(lian)接一個(ge)電(dian)極(ji)引(yin)(yin)出(chu)(chu)片(pian)3，該電(dian)極(ji)引(yin)(yin)出(chu)(chu)片(pian)3外(wai)露下基板(ban)右(you)(you)側(ce)；印(yin)刷(shua)(shua)電(dian)極(ji)6從連(lian)接電(dian)極(ji)連(lian)接片(pian)9到連(lian)接電(dian)極(ji)引(yin)(yin)出(chu)(chu)片(pian)3的(de)(de)(de)(de)(de)(de)一段上表面設(she)(she)置(zhi)(zhi)有電(dian)極(ji)保(bao)護膜5，該電(dian)極(ji)保(bao)護膜為羥(qian)乙(yi)基纖維素(HEC)膜層。

以上柔性單(dan)點力片式(shi)傳(chuan)感器制造方法(fa)，包括下述步驟：

a.先制備(bei)形狀大小(xiao)相同(tong)的上(shang)基板(ban)和下基板(ban)，在上(shang)基板(ban)長度(du)方向的一(yi)(yi)側設置一(yi)(yi)凸(tu)起(qi)；在相對(dui)該凸(tu)起(qi)的下基板(ban)上(shang)設置一(yi)(yi)凹陷；

b.將下基(ji)板1固定(ding)在絲網印刷(shua)機的(de)印刷(shua)臺上(shang)，用導(dao)電料漿沿下基(ji)板長(chang)度方向從(cong)遠離(li)凹(ao)陷(xian)一(yi)側到(dao)凹(ao)陷(xian)的(de)上(shang)表面印制兩條印刷(shua)電極，干燥(zao)后，在下基(ji)板遠離(li)凹(ao)陷(xian)的(de)一(yi)側設置兩個(ge)外(wai)露的(de)電極引出片3。

c.在下基板凹陷中涂敷壓敏(min)電(dian)(dian)(dian)阻(zu)油墨，并放置一個壓敏(min)體(ti)(ti)，該壓敏(min)體(ti)(ti)上(shang)、下端(duan)面事先分別焊(han)接(jie)(jie)好兩(liang)個電(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)接(jie)(jie)片(pian)9，位(wei)于壓敏(min)體(ti)(ti)上(shang)、下端(duan)面的(de)兩(liang)電(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)接(jie)(jie)片(pian)9分別連(lian)(lian)接(jie)(jie)至位(wei)于下基板上(shang)的(de)兩(liang)條印刷電(dian)(dian)(dian)極(ji)(ji)6，兩(liang)條印刷電(dian)(dian)(dian)極(ji)(ji)6的(de)另一端(duan)連(lian)(lian)接(jie)(jie)外(wai)露的(de)兩(liang)個電(dian)(dian)(dian)極(ji)(ji)引出片(pian)3；同(tong)時，在上(shang)基板4的(de)凸起內表(biao)面上(shang)涂敷壓敏(min)電(dian)(dian)(dian)阻(zu)油墨。

d.在下(xia)基板的兩(liang)條印刷電(dian)(dian)(dian)極(ji)6上從(cong)連(lian)接電(dian)(dian)(dian)極(ji)連(lian)接片9到(dao)連(lian)接電(dian)(dian)(dian)極(ji)引出片3的一段上表面涂敷(fu)一層電(dian)(dian)(dian)極(ji)保護膜并干燥(zao)。

e.將(jiang)上(shang)、下基板用粘接(jie)層復合，使所述凸起(qi)與(yu)(yu)凹陷(xian)之間形成(cheng)一(yi)個的密(mi)閉(bi)壓敏(min)體(ti)(ti)(ti)室，將(jiang)壓敏(min)體(ti)(ti)(ti)及電極連(lian)接(jie)片封裝在其內，壓敏(min)體(ti)(ti)(ti)室的大小(xiao)剛(gang)好與(yu)(yu)壓敏(min)體(ti)(ti)(ti)的大小(xiao)吻(wen)合，同(tong)時(shi)兩(liang)條(tiao)印刷電極相互(hu)平行。

當(dang)上述(shu)絲網印刷單點(dian)力片(pian)式傳(chuan)感(gan)(gan)器與外(wai)(wai)接(jie)電路連接(jie)并通過能(neng)正常工作的測試后，該傳(chuan)感(gan)(gan)器外(wai)(wai)露部分電極引出片(pian)3與外(wai)(wai)接(jie)導線連接(jie)部分用絕緣硅膠將其(qi)覆蓋以防銀電極長期處于在空氣(qi)中被氧化而削弱或喪(sang)失了其(qi)導電性能(neng)。

本發明柔性單(dan)點(dian)力(li)片式傳感器(qi)的(de)檢測原(yuan)理如(ru)下：當處于點(dian)接(jie)觸(chu)狀(zhuang)態時物體間的(de)一集(ji)中(zhong)(zhong)載荷(he)(he)(集(ji)中(zhong)(zhong)力(li))作(zuo)用(yong)于壓(ya)(ya)(ya)敏電(dian)(dian)(dian)阻(zu)7上(shang)(shang)時，壓(ya)(ya)(ya)敏電(dian)(dian)(dian)阻(zu)因受到了壓(ya)(ya)(ya)力(li)作(zuo)用(yong)便發生了一定的(de)壓(ya)(ya)(ya)縮變(bian)形，從而引起了壓(ya)(ya)(ya)敏電(dian)(dian)(dian)阻(zu)值(zhi)的(de)變(bian)化，反(fan)映(ying)在電(dian)(dian)(dian)路上(shang)(shang)便是兩(liang)銀導電(dian)(dian)(dian)電(dian)(dian)(dian)極6之間電(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)的(de)改變(bian)；根據壓(ya)(ya)(ya)敏電(dian)(dian)(dian)阻(zu)上(shang)(shang)電(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)相對于最(zui)初電(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)的(de)變(bian)化量便可反(fan)映(ying)出點(dian)接(jie)觸(chu)處壓(ya)(ya)(ya)力(li)或(huo)集(ji)中(zhong)(zhong)載荷(he)(he)的(de)大小。集(ji)中(zhong)(zhong)載荷(he)(he)與軸(zhou)向(xiang)長度、電(dian)(dian)(dian)阻(zu)阻(zu)值(zhi)與軸(zhou)向(xiang)長度的(de)關系(xi)、電(dian)(dian)(dian)壓(ya)(ya)(ya)與電(dian)(dian)(dian)阻(zu)的(de)關系(xi)如(ru)下：

ΔL=FLES---(1)

其中：L——壓(ya)敏電阻的原(yuan)始(shi)厚(hou)度(du)；

S——壓敏電阻的(de)橫截面(mian)面(mian)積；

F——作用于壓敏電阻(zu)上的集(ji)中載荷；

E——壓敏電阻(zu)的彈性(xing)模(mo)量；

ΔL——壓敏電阻油墨厚度(du)的改變(bian)量。

R=ρLS---(2)

其中：L——壓敏電阻油墨的厚度；

S——壓(ya)敏電阻(zu)油墨的橫截面面積；

ρ——壓敏電阻(zu)油墨(mo)的電阻(zu)率；

R——壓(ya)敏電(dian)阻油墨(mo)的電(dian)阻值(zhi)。

                U＝IR        (3)

其中：I——流(liu)經壓敏(min)電(dian)阻的電(dian)流(liu)值；

R——壓敏電阻油墨的(de)電阻值；

U——壓敏電阻(zu)油(you)墨的(de)電壓值；

如圖4所示(shi)，絲網印刷單(dan)點(dian)力(li)(li)(li)片式傳(chuan)(chuan)感器(qi)(qi)(qi)的(de)(de)(de)壓(ya)(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)因(yin)為(wei)只受到軸向壓(ya)(ya)(ya)(ya)(ya)縮變(bian)(bian)(bian)(bian)形而(er)引(yin)起(qi)(qi)了(le)其阻(zu)(zu)(zu)(zu)值(zhi)的(de)(de)(de)改(gai)變(bian)(bian)(bian)(bian)，因(yin)此(ci)在(zai)測(ce)量電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中壓(ya)(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)可以(yi)被當作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中的(de)(de)(de)可變(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)對待；同時(shi)又由于(yu)(yu)壓(ya)(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)的(de)(de)(de)改(gai)變(bian)(bian)(bian)(bian)引(yin)起(qi)(qi)了(le)加在(zai)壓(ya)(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)兩端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)值(zhi)的(de)(de)(de)改(gai)變(bian)(bian)(bian)(bian)，因(yin)此(ci)壓(ya)(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)改(gai)變(bian)(bian)(bian)(bian)可以(yi)被當作(zuo)檢(jian)測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)(de)輸(shu)(shu)入(ru)變(bian)(bian)(bian)(bian)量信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)。由于(yu)(yu)單(dan)點(dian)力(li)(li)(li)傳(chuan)(chuan)感器(qi)(qi)(qi)的(de)(de)(de)壓(ya)(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)因(yin)外(wai)力(li)(li)(li)作(zuo)用(yong)而(er)引(yin)起(qi)(qi)了(le)加在(zai)其兩端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)改(gai)變(bian)(bian)(bian)(bian)，反(fan)(fan)(fan)(fan)相(xiang)(xiang)(xiang)(xiang)比(bi)(bi)例放(fang)(fang)大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)(de)輸(shu)(shu)入(ru)端(duan)恰好是壓(ya)(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)改(gai)變(bian)(bian)(bian)(bian)端(duan)；因(yin)此(ci)壓(ya)(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)改(gai)變(bian)(bian)(bian)(bian)必然引(yin)起(qi)(qi)了(le)反(fan)(fan)(fan)(fan)相(xiang)(xiang)(xiang)(xiang)比(bi)(bi)例放(fang)(fang)大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)I輸(shu)(shu)出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)值(zhi)的(de)(de)(de)改(gai)變(bian)(bian)(bian)(bian)，也(ye)就是說單(dan)點(dian)力(li)(li)(li)傳(chuan)(chuan)感器(qi)(qi)(qi)受外(wai)力(li)(li)(li)作(zuo)用(yong)是可以(yi)引(yin)起(qi)(qi)測(ce)量電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中相(xiang)(xiang)(xiang)(xiang)應電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)改(gai)變(bian)(bian)(bian)(bian)的(de)(de)(de)。當外(wai)力(li)(li)(li)作(zuo)用(yong)于(yu)(yu)單(dan)點(dian)力(li)(li)(li)傳(chuan)(chuan)感器(qi)(qi)(qi)后(hou)(hou)由于(yu)(yu)壓(ya)(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)值(zhi)的(de)(de)(de)改(gai)變(bian)(bian)(bian)(bian)而(er)產生了(le)一定的(de)(de)(de)微(wei)弱(ruo)電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)，通(tong)(tong)(tong)過反(fan)(fan)(fan)(fan)相(xiang)(xiang)(xiang)(xiang)比(bi)(bi)例放(fang)(fang)大(da)(da)器(qi)(qi)(qi)I將該(gai)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)放(fang)(fang)大(da)(da)；然后(hou)(hou)再(zai)通(tong)(tong)(tong)過低通(tong)(tong)(tong)濾(lv)波(bo)器(qi)(qi)(qi)將其他高頻干擾信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)過濾(lv)或(huo)者(zhe)去除；接(jie)著再(zai)通(tong)(tong)(tong)過反(fan)(fan)(fan)(fan)相(xiang)(xiang)(xiang)(xiang)比(bi)(bi)例放(fang)(fang)大(da)(da)器(qi)(qi)(qi)II將電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)還(huan)原(yuan)到最(zui)初(chu)的(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)位(因(yin)為(wei)前后(hou)(hou)經(jing)過了(le)兩次反(fan)(fan)(fan)(fan)相(xiang)(xiang)(xiang)(xiang)放(fang)(fang)大(da)(da)，因(yin)此(ci)經(jing)過處理(li)后(hou)(hou)的(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)可以(yi)恢復到原(yuan)來的(de)(de)(de)正電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)值(zhi)，同時(shi)將微(wei)弱(ruo)電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)值(zhi)放(fang)(fang)大(da)(da)了(le))；最(zui)后(hou)(hou)再(zai)通(tong)(tong)(tong)過A/D轉換器(qi)(qi)(qi)限壓(ya)(ya)(ya)(ya)(ya)轉換將外(wai)力(li)(li)(li)引(yin)起(qi)(qi)的(de)(de)(de)并(bing)經(jing)過處理(li)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)轉換為(wei)計算機能識別的(de)(de)(de)數(shu)字電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)，當然也(ye)可以(yi)直接(jie)將反(fan)(fan)(fan)(fan)相(xiang)(xiang)(xiang)(xiang)比(bi)(bi)例放(fang)(fang)大(da)(da)器(qi)(qi)(qi)II處理(li)后(hou)(hou)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)直接(jie)輸(shu)(shu)入(ru)至可以(yi)接(jie)收該(gai)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)模擬顯示(shi)儀器(qi)(qi)(qi)或(huo)處理(li)儀器(qi)(qi)(qi)例如模擬信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)示(shi)波(bo)顯示(shi)器(qi)(qi)(qi)或(huo)者(zhe)模擬信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)處理(li)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)板。