技術領域

本發明涉及(ji)一種傳(chuan)感器及(ji)其(qi)制(zhi)造方法，特(te)別涉及(ji)一種用于在某(mou)一狹小(xiao)接(jie)觸(chu)區域(yu)中對一點接(jie)觸(chu)物體間(jian)的壓(ya)力或(huo)集中力進(jin)行檢測的柔性單點力片式傳(chuan)感器及(ji)其(qi)制(zhi)造方法。

背景技術

壓力(li)(li)傳感器及檢(jian)測技術在航(hang)(hang)空航(hang)(hang)天、軍(jun)事工(gong)業(ye)、汽車、船舶制造、工(gong)業(ye)自動化、醫(yi)學研(yan)究、生(sheng)物醫(yi)療等(deng)領域中(zhong)(zhong)發揮著重(zhong)要的(de)(de)(de)作(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)。然而在上述應用(yong)(yong)(yong)領域，許多(duo)場(chang)合(he)(he)需在某(mou)(mou)一狹小(xiao)空間(jian)(jian)中(zhong)(zhong)對某(mou)(mou)一點接(jie)觸(chu)(chu)物體(ti)間(jian)(jian)的(de)(de)(de)壓力(li)(li)或集(ji)(ji)中(zhong)(zhong)力(li)(li)進行檢(jian)測，例如(ru)點接(jie)觸(chu)(chu)物體(ti)間(jian)(jian)在運動過程中(zhong)(zhong)摩擦力(li)(li)相互(hu)作(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)過程的(de)(de)(de)研(yan)究、例如(ru)檢(jian)測空間(jian)(jian)凸輪與滾子從動件處于點接(jie)觸(chu)(chu)狀態下的(de)(de)(de)相互(hu)作(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)力(li)(li)、檢(jian)測某(mou)(mou)一對牙齒嚙合(he)(he)時(shi)的(de)(de)(de)相互(hu)作(zuo)(zuo)(zuo)(zuo)用(yong)(yong)(yong)力(li)(li)等(deng)。由于受到傳感器重(zhong)量、體(ti)積以及工(gong)作(zuo)(zuo)(zuo)(zuo)空間(jian)(jian)(如(ru)狹縫)的(de)(de)(de)限(xian)制，這(zhe)時(shi)傳統壓力(li)(li)傳感器便(bian)不能用(yong)(yong)(yong)于上述場(chang)合(he)(he)下的(de)(de)(de)使用(yong)(yong)(yong)來(lai)檢(jian)測某(mou)(mou)一點接(jie)觸(chu)(chu)物體(ti)間(jian)(jian)的(de)(de)(de)壓力(li)(li)或集(ji)(ji)中(zhong)(zhong)力(li)(li)。即便(bian)勉強使用(yong)(yong)(yong)，也不能滿(man)足操作(zuo)(zuo)(zuo)(zuo)便(bian)捷的(de)(de)(de)要求，

發明內容

本(ben)發明(ming)針對傳(chuan)統壓力傳(chuan)感(gan)(gan)器不(bu)能對某一(yi)點(dian)接(jie)觸物體(ti)間(jian)壓力進行檢測、體(ti)積(ji)大(da)、重(zhong)量(liang)重(zhong)、操作(zuo)(zuo)不(bu)方便的(de)缺點(dian)；提供了一(yi)種能夠檢測出(chu)某一(yi)點(dian)接(jie)觸物體(ti)間(jian)壓力的(de)柔性(xing)單(dan)點(dian)力片式傳(chuan)感(gan)(gan)器，該傳(chuan)感(gan)(gan)器具(ju)有體(ti)積(ji)小、重(zhong)量(liang)輕、制(zhi)作(zuo)(zuo)簡單(dan)、可低成本(ben)批(pi)量(liang)化生產的(de)特點(dian)，并且(qie)可重(zhong)復使(shi)用、操作(zuo)(zuo)簡便。

本發明的(de)另一(yi)個目的(de)是提供(gong)一(yi)種該(gai)傳感器的(de)制造方法(fa)。

為達到上述目的(de)，本發(fa)明是(shi)采取如下(xia)技術方案予以(yi)實現(xian)的(de)：

一(yi)種柔性單點力片(pian)(pian)式(shi)傳感器，包括(kuo)壓(ya)(ya)敏(min)(min)體(ti)、分別(bie)設置(zhi)在(zai)壓(ya)(ya)敏(min)(min)體(ti)上(shang)(shang)下端面的(de)(de)(de)(de)兩個電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)(jie)片(pian)(pian)，其特征(zheng)在(zai)于，還包括(kuo)有(you)形狀大(da)小(xiao)相(xiang)(xiang)同的(de)(de)(de)(de)上(shang)(shang)基(ji)(ji)板(ban)和(he)下基(ji)(ji)板(ban)，上(shang)(shang)、下基(ji)(ji)板(ban)之(zhi)間由(you)粘(zhan)接(jie)(jie)層封接(jie)(jie)；在(zai)上(shang)(shang)基(ji)(ji)板(ban)長度方向(xiang)的(de)(de)(de)(de)一(yi)側設置(zhi)有(you)一(yi)凸(tu)起；在(zai)相(xiang)(xiang)對該凸(tu)起的(de)(de)(de)(de)下基(ji)(ji)板(ban)上(shang)(shang)設置(zhi)有(you)一(yi)凹陷(xian)，該凹陷(xian)與所(suo)(suo)述凸(tu)起之(zhi)間形成一(yi)個密閉的(de)(de)(de)(de)壓(ya)(ya)敏(min)(min)體(ti)室(shi)，其中封裝有(you)所(suo)(suo)述的(de)(de)(de)(de)壓(ya)(ya)敏(min)(min)體(ti)及電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)(jie)片(pian)(pian)，所(suo)(suo)述壓(ya)(ya)敏(min)(min)體(ti)室(shi)的(de)(de)(de)(de)大(da)小(xiao)剛好與壓(ya)(ya)敏(min)(min)體(ti)的(de)(de)(de)(de)大(da)小(xiao)吻合；所(suo)(suo)述下基(ji)(ji)板(ban)1沿其長度方向(xiang)設置(zhi)有(you)兩條相(xiang)(xiang)互平行的(de)(de)(de)(de)印(yin)刷電(dian)(dian)(dian)(dian)極(ji)(ji)6，每個印(yin)刷電(dian)(dian)(dian)(dian)極(ji)(ji)分別(bie)連(lian)接(jie)(jie)位于壓(ya)(ya)敏(min)(min)體(ti)上(shang)(shang)或下端面的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)(jie)片(pian)(pian)9和(he)伸出下基(ji)(ji)板(ban)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)極(ji)(ji)引出片(pian)(pian)3；所(suo)(suo)述下基(ji)(ji)板(ban)上(shang)(shang)的(de)(de)(de)(de)兩條印(yin)刷電(dian)(dian)(dian)(dian)極(ji)(ji)6從連(lian)接(jie)(jie)電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)(jie)片(pian)(pian)9到連(lian)接(jie)(jie)電(dian)(dian)(dian)(dian)極(ji)(ji)引出片(pian)(pian)3一(yi)段的(de)(de)(de)(de)上(shang)(shang)表面設置(zhi)有(you)電(dian)(dian)(dian)(dian)極(ji)(ji)保護膜。

一種(zhong)上述柔性單點力片式傳感器的制造方法(fa)，其(qi)特征在于，包括如下(xia)步驟：

a.先制備形狀大(da)小相同(tong)的上基(ji)(ji)板(ban)和下(xia)(xia)基(ji)(ji)板(ban)，在上基(ji)(ji)板(ban)長度方向(xiang)的一側設置一凸起(qi)；在相對該凸起(qi)的下(xia)(xia)基(ji)(ji)板(ban)上設置一凹陷；

b.將下基板1固(gu)定(ding)在(zai)(zai)絲網(wang)印(yin)刷(shua)(shua)機的印(yin)刷(shua)(shua)臺上，用導電料漿沿下基板長度方向從遠離凹陷(xian)一(yi)側(ce)到凹陷(xian)的上表面(mian)印(yin)制兩(liang)條印(yin)刷(shua)(shua)電極(ji)，干燥(zao)后，在(zai)(zai)下基板遠離凹陷(xian)的一(yi)側(ce)設置(zhi)兩(liang)個(ge)外露(lu)的電極(ji)引出片3。

c.在(zai)下基(ji)板凹陷中涂敷(fu)壓敏(min)電(dian)(dian)阻油(you)墨，并放置(zhi)一(yi)個(ge)壓敏(min)體(ti)，該(gai)壓敏(min)體(ti)上(shang)、下端(duan)面(mian)事先分(fen)別焊接(jie)(jie)好兩(liang)個(ge)電(dian)(dian)極連接(jie)(jie)片(pian)9，位于壓敏(min)體(ti)上(shang)、下端(duan)面(mian)的(de)(de)兩(liang)電(dian)(dian)極連接(jie)(jie)片(pian)9分(fen)別連接(jie)(jie)至位于下基(ji)板上(shang)的(de)(de)兩(liang)條(tiao)印刷電(dian)(dian)極6的(de)(de)一(yi)端(duan)，兩(liang)條(tiao)印刷電(dian)(dian)極6的(de)(de)另一(yi)端(duan)連接(jie)(jie)外露(lu)的(de)(de)兩(liang)個(ge)電(dian)(dian)極引出片(pian)3；同時，在(zai)上(shang)基(ji)板4的(de)(de)凸起內表面(mian)上(shang)涂敷(fu)壓敏(min)電(dian)(dian)阻油(you)墨。

d.在下(xia)基板的兩(liang)條印刷(shua)電(dian)極(ji)6上從連(lian)接(jie)電(dian)極(ji)連(lian)接(jie)片(pian)9到連(lian)接(jie)電(dian)極(ji)引出片(pian)3的一段上表(biao)面涂敷一層電(dian)極(ji)保護膜并干燥(zao)。

e.將上(shang)、下基板用粘接層復合，使所述凸起與(yu)凹陷之間(jian)形成一個(ge)的密閉壓(ya)敏體室，將壓(ya)敏體及電極(ji)連接片封裝在其(qi)內，壓(ya)敏體室的大(da)小(xiao)(xiao)剛(gang)好與(yu)壓(ya)敏體的大(da)小(xiao)(xiao)吻合，同(tong)時兩條印刷電極(ji)相互平(ping)行。

以上方法中，所(suo)述(shu)(shu)(shu)的(de)(de)印刷電(dian)極用導電(dian)漿料(liao)為銀導電(dian)漿料(liao)；所(suo)述(shu)(shu)(shu)的(de)(de)電(dian)極保護膜材料(liao)采用羥(qian)乙基纖維素(su)；所(suo)述(shu)(shu)(shu)的(de)(de)壓敏電(dian)阻(zu)油(you)墨采用碳二硫化鉬油(you)墨；所(suo)述(shu)(shu)(shu)的(de)(de)上、下基板采用聚氯乙烯材料(liao)制成矩形基片；所(suo)述(shu)(shu)(shu)的(de)(de)粘(zhan)接層采用環氧樹(shu)脂。

本發明的(de)(de)柔性單點(dian)力(li)片(pian)式傳感器不需要外(wai)加保(bao)護裝置，不用將(jiang)壓敏電(dian)(dian)阻直(zhi)接置入被(bei)測對(dui)象內(nei)部(bu)，只需將(jiang)被(bei)測對(dui)象的(de)(de)點(dian)接觸部(bu)位(wei)與壓敏電(dian)(dian)阻所對(dui)應的(de)(de)壓敏體(ti)室的(de)(de)聚氯乙(yi)烯PVC絕(jue)緣基片(pian)直(zhi)接接觸即可(ke)；同時壓敏電(dian)(dian)阻材料在(zai)工作(zuo)過程中始終受到(dao)了聚氯乙(yi)烯PVC片(pian)的(de)(de)絕(jue)緣保(bao)護。由于(yu)兩條銀導電(dian)(dian)電(dian)(dian)極均(jun)處于(yu)羥乙(yi)基纖維素HEC的(de)(de)絕(jue)緣保(bao)護下，可(ke)有效防止兩電(dian)(dian)極間(jian)間(jian)距太小而(er)引起的(de)(de)電(dian)(dian)子遷移所造成的(de)(de)電(dian)(dian)極間(jian)短路現(xian)象。該柔性單點(dian)力(li)片(pian)式傳感器只有電(dian)(dian)極引出片(pian)部(bu)分區域外(wai)露，因此具(ju)有抗(kang)強干擾(rao)的(de)(de)優點(dian)。

本(ben)發明采用(yong)基于(yu)絲網印刷(shua)工(gong)藝的(de)制(zhi)(zhi)造方法，使(shi)(shi)制(zhi)(zhi)得的(de)單點力(li)傳感器具有重(zhong)量輕、體積(ji)小(片狀)、成(cheng)本(ben)低、制(zhi)(zhi)作(zuo)簡單、可批量化生產的(de)特點，并可重(zhong)復(fu)使(shi)(shi)用(yong)、操(cao)作(zuo)便捷(jie)。該傳感器可應(ying)用(yong)于(yu)工(gong)作(zuo)空間狹小的(de)某一點接觸物(wu)體間的(de)壓(ya)力(li)或集中力(li)的(de)檢測以及(ji)類(lei)似特殊應(ying)用(yong)場合。

附圖說明

圖(tu)1為本(ben)發明柔(rou)性單點(dian)力片(pian)式(shi)傳感(gan)器結構示(shi)意圖(tu)。圖(tu)中：1、下(xia)基板(ban)；2、粘接層(ceng)；3、電極引(yin)出(chu)片(pian)；4、上基板(ban)；5、電極保(bao)護膜(mo)；6、印刷電極；7、壓敏體(ti)。

圖(tu)2為圖(tu)1的俯視其及印刷電(dian)極(ji)的局(ju)部剖視圖(tu)。圖(tu)中(zhong)：8、上基板(ban)凸起；9、電(dian)極(ji)連(lian)接片。

圖3為圖2的剖(pou)面圖。圖中：10、下基板凹陷(xian)。

圖(tu)4為本(ben)發明柔性單點(dian)力片式傳感(gan)器一個應用實例(li)的測量電(dian)路(lu)原理(li)圖(tu)。

具體實施(shi)方式

下面結合附圖及實施例對本(ben)發明作進一步的(de)詳(xiang)細說明。

如圖1-圖3所示，一(yi)(yi)種柔性單點(dian)力片(pian)(pian)(pian)式(shi)傳(chuan)感器，包括上(shang)基(ji)(ji)板(ban)(ban)(ban)4和(he)下(xia)基(ji)(ji)板(ban)(ban)(ban)1、壓(ya)敏(min)(min)體(ti)(ti)7、設(she)置在(zai)壓(ya)敏(min)(min)體(ti)(ti)7垂(chui)直(zhi)兩端面的(de)(de)(de)兩個電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)連(lian)(lian)接(jie)片(pian)(pian)(pian)9，上(shang)、下(xia)基(ji)(ji)板(ban)(ban)(ban)之間(jian)由(you)環氧樹脂粘接(jie)層2封(feng)接(jie)；上(shang)、下(xia)基(ji)(ji)板(ban)(ban)(ban)4、1可由(you)聚氯(lv)乙烯(PVC)制(zhi)成(cheng)相同大小尺寸的(de)(de)(de)矩形基(ji)(ji)片(pian)(pian)(pian)；在(zai)靠近(jin)上(shang)基(ji)(ji)板(ban)(ban)(ban)4長度方向的(de)(de)(de)左(zuo)側(ce)設(she)置有一(yi)(yi)凸起8；在(zai)相對該凸起8的(de)(de)(de)下(xia)基(ji)(ji)板(ban)(ban)(ban)上(shang)設(she)置有一(yi)(yi)凹(ao)(ao)陷10，該凹(ao)(ao)陷與(yu)(yu)凸起之間(jian)形成(cheng)一(yi)(yi)個的(de)(de)(de)密閉(bi)壓(ya)敏(min)(min)體(ti)(ti)室，其(qi)中封(feng)裝有壓(ya)敏(min)(min)體(ti)(ti)7及電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)連(lian)(lian)接(jie)片(pian)(pian)(pian)9，壓(ya)敏(min)(min)體(ti)(ti)室的(de)(de)(de)大小剛(gang)好與(yu)(yu)壓(ya)敏(min)(min)體(ti)(ti)7的(de)(de)(de)大小吻(wen)合，壓(ya)敏(min)(min)體(ti)(ti)7為(wei)圓片(pian)(pian)(pian)或方塊形壓(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻；下(xia)基(ji)(ji)板(ban)(ban)(ban)1上(shang)設(she)置有兩條(tiao)沿其(qi)長度方向相互平行的(de)(de)(de)印刷電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)6，印刷電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)6為(wei)銀導電(dian)(dian)(dian)(dian)帶(dai)狀薄(bo)膜。每條(tiao)印刷電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)在(zai)凹(ao)(ao)陷右邊沿處的(de)(de)(de)一(yi)(yi)端連(lian)(lian)接(jie)一(yi)(yi)個電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)連(lian)(lian)接(jie)片(pian)(pian)(pian)9；遠離(li)凹(ao)(ao)陷到下(xia)基(ji)(ji)板(ban)(ban)(ban)1右側(ce)處的(de)(de)(de)另一(yi)(yi)端連(lian)(lian)接(jie)一(yi)(yi)個電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)引出(chu)片(pian)(pian)(pian)3，該電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)引出(chu)片(pian)(pian)(pian)3外(wai)露下(xia)基(ji)(ji)板(ban)(ban)(ban)右側(ce)；印刷電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)6從連(lian)(lian)接(jie)電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)連(lian)(lian)接(jie)片(pian)(pian)(pian)9到連(lian)(lian)接(jie)電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)引出(chu)片(pian)(pian)(pian)3的(de)(de)(de)一(yi)(yi)段上(shang)表面設(she)置有電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)保(bao)護(hu)膜5，該電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)保(bao)護(hu)膜為(wei)羥乙基(ji)(ji)纖維素(su)(HEC)膜層。

以(yi)上柔性單點力片式(shi)傳感(gan)器(qi)制造方法，包括下述步驟：

a.先制備形(xing)狀大小(xiao)相同的上基(ji)板和下(xia)基(ji)板，在上基(ji)板長度方(fang)向的一(yi)側設(she)置一(yi)凸起；在相對該(gai)凸起的下(xia)基(ji)板上設(she)置一(yi)凹(ao)陷；

b.將(jiang)下基板1固定在絲網印(yin)刷(shua)機的(de)(de)印(yin)刷(shua)臺(tai)上，用導(dao)電(dian)料漿(jiang)沿下基板長度(du)方向從遠(yuan)離(li)凹陷一側(ce)到(dao)凹陷的(de)(de)上表面印(yin)制兩(liang)條印(yin)刷(shua)電(dian)極，干燥后，在下基板遠(yuan)離(li)凹陷的(de)(de)一側(ce)設置兩(liang)個外露(lu)的(de)(de)電(dian)極引出片3。

c.在(zai)下基(ji)板凹陷中涂(tu)敷(fu)壓(ya)敏電(dian)阻(zu)油墨，并放(fang)置一個壓(ya)敏體(ti)(ti)，該壓(ya)敏體(ti)(ti)上(shang)、下端(duan)面(mian)事(shi)先(xian)分別焊接好兩個電(dian)極連接片(pian)(pian)9，位(wei)于(yu)壓(ya)敏體(ti)(ti)上(shang)、下端(duan)面(mian)的兩電(dian)極連接片(pian)(pian)9分別連接至位(wei)于(yu)下基(ji)板上(shang)的兩條印刷電(dian)極6，兩條印刷電(dian)極6的另(ling)一端(duan)連接外露的兩個電(dian)極引出片(pian)(pian)3；同(tong)時，在(zai)上(shang)基(ji)板4的凸起(qi)內表(biao)面(mian)上(shang)涂(tu)敷(fu)壓(ya)敏電(dian)阻(zu)油墨。

d.在下基板(ban)的兩(liang)條印刷電極(ji)(ji)(ji)6上(shang)從連接(jie)(jie)電極(ji)(ji)(ji)連接(jie)(jie)片9到(dao)連接(jie)(jie)電極(ji)(ji)(ji)引出片3的一段上(shang)表面涂(tu)敷一層電極(ji)(ji)(ji)保護膜(mo)并干(gan)燥。

e.將上、下(xia)基板用(yong)粘接層復(fu)合，使所(suo)述(shu)凸起與凹陷之間形成(cheng)一個的密閉壓敏體(ti)室，將壓敏體(ti)及電(dian)極連接片封裝(zhuang)在其內，壓敏體(ti)室的大(da)小(xiao)剛(gang)好與壓敏體(ti)的大(da)小(xiao)吻合，同時兩條印刷電(dian)極相互(hu)平行。

當(dang)上述絲(si)網(wang)印刷單點(dian)力片(pian)式傳感器(qi)與外接(jie)電(dian)路連接(jie)并通過(guo)能(neng)正常工作(zuo)的測(ce)試(shi)后(hou)，該傳感器(qi)外露(lu)部分電(dian)極引(yin)出片(pian)3與外接(jie)導(dao)線連接(jie)部分用(yong)絕緣(yuan)硅(gui)膠將(jiang)其(qi)覆(fu)蓋(gai)以(yi)防銀電(dian)極長期處于在空氣中被(bei)氧化而削弱或喪(sang)失了其(qi)導(dao)電(dian)性能(neng)。

本發明柔(rou)性(xing)單點(dian)力(li)(li)片式傳感器的(de)(de)(de)檢測(ce)原理如(ru)下(xia)：當處于點(dian)接觸(chu)狀(zhuang)態時物體間(jian)的(de)(de)(de)一集(ji)中載荷(集(ji)中力(li)(li))作用(yong)于壓(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)阻(zu)7上時，壓(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)阻(zu)因受到了壓(ya)(ya)(ya)(ya)力(li)(li)作用(yong)便(bian)發生了一定(ding)的(de)(de)(de)壓(ya)(ya)(ya)(ya)縮變(bian)(bian)形，從而引(yin)起了壓(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)阻(zu)值的(de)(de)(de)變(bian)(bian)化(hua)，反映(ying)在(zai)電(dian)(dian)(dian)(dian)(dian)路(lu)上便(bian)是兩銀導電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)極6之間(jian)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值的(de)(de)(de)改變(bian)(bian)；根(gen)據壓(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)阻(zu)上電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值相對(dui)于最初(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值的(de)(de)(de)變(bian)(bian)化(hua)量便(bian)可(ke)反映(ying)出點(dian)接觸(chu)處壓(ya)(ya)(ya)(ya)力(li)(li)或(huo)集(ji)中載荷的(de)(de)(de)大小。集(ji)中載荷與(yu)軸(zhou)向長度(du)、電(dian)(dian)(dian)(dian)(dian)阻(zu)阻(zu)值與(yu)軸(zhou)向長度(du)的(de)(de)(de)關(guan)系、電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)與(yu)電(dian)(dian)(dian)(dian)(dian)阻(zu)的(de)(de)(de)關(guan)系如(ru)下(xia)：

ΔL=FLES---(1)

其(qi)中：L——壓(ya)敏電阻的原始厚度；

S——壓敏電阻的(de)橫(heng)截(jie)面面積；

F——作用于壓敏電阻上的(de)集中載荷(he)；

E——壓(ya)敏電阻(zu)的彈性模量；

ΔL——壓(ya)敏(min)電阻油墨厚度的改變量。

R=ρLS---(2)

其中：L——壓敏電阻(zu)油(you)墨的厚度(du)；

S——壓敏電(dian)阻油墨(mo)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(you)墨的電阻(zu)值。

                U＝IR        (3)

其(qi)中：I——流經壓敏電(dian)阻的電(dian)流值；

R——壓敏電阻油墨(mo)的電阻值；

U——壓敏電(dian)阻油(you)墨的(de)電(dian)壓值；

如圖4所(suo)示(shi)，絲網印刷(shua)單(dan)點力(li)片式傳(chuan)感(gan)(gan)器(qi)(qi)(qi)(qi)的(de)(de)壓(ya)(ya)(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)因(yin)為(wei)(wei)只受到軸(zhou)向壓(ya)(ya)(ya)(ya)(ya)縮(suo)變(bian)形而(er)引起(qi)了(le)其(qi)阻(zu)(zu)值(zhi)(zhi)(zhi)的(de)(de)改(gai)(gai)變(bian)，因(yin)此在(zai)測(ce)(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)壓(ya)(ya)(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)可(ke)以(yi)(yi)被(bei)當(dang)(dang)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)的(de)(de)可(ke)變(bian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)對待(dai)；同時又由(you)于壓(ya)(ya)(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)的(de)(de)改(gai)(gai)變(bian)引起(qi)了(le)加在(zai)壓(ya)(ya)(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)兩端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)值(zhi)(zhi)(zhi)的(de)(de)改(gai)(gai)變(bian)，因(yin)此壓(ya)(ya)(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)改(gai)(gai)變(bian)可(ke)以(yi)(yi)被(bei)當(dang)(dang)作(zuo)(zuo)檢測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)輸(shu)入變(bian)量(liang)信(xin)(xin)(xin)號(hao)。由(you)于單(dan)點力(li)傳(chuan)感(gan)(gan)器(qi)(qi)(qi)(qi)的(de)(de)壓(ya)(ya)(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)因(yin)外力(li)作(zuo)(zuo)用而(er)引起(qi)了(le)加在(zai)其(qi)兩端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)改(gai)(gai)變(bian)，反相(xiang)(xiang)比例放(fang)(fang)(fang)(fang)(fang)大電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)輸(shu)入端恰好(hao)是壓(ya)(ya)(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)改(gai)(gai)變(bian)端；因(yin)此壓(ya)(ya)(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)改(gai)(gai)變(bian)必(bi)然(ran)引起(qi)了(le)反相(xiang)(xiang)比例放(fang)(fang)(fang)(fang)(fang)大電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)I輸(shu)出電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)值(zhi)(zhi)(zhi)的(de)(de)改(gai)(gai)變(bian)，也就是說(shuo)單(dan)點力(li)傳(chuan)感(gan)(gan)器(qi)(qi)(qi)(qi)受外力(li)作(zuo)(zuo)用是可(ke)以(yi)(yi)引起(qi)測(ce)(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)相(xiang)(xiang)應(ying)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)改(gai)(gai)變(bian)的(de)(de)。當(dang)(dang)外力(li)作(zuo)(zuo)用于單(dan)點力(li)傳(chuan)感(gan)(gan)器(qi)(qi)(qi)(qi)后(hou)由(you)于壓(ya)(ya)(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)值(zhi)(zhi)(zhi)的(de)(de)改(gai)(gai)變(bian)而(er)產生了(le)一定(ding)的(de)(de)微弱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)，通(tong)過反相(xiang)(xiang)比例放(fang)(fang)(fang)(fang)(fang)大器(qi)(qi)(qi)(qi)I將(jiang)該(gai)信(xin)(xin)(xin)號(hao)放(fang)(fang)(fang)(fang)(fang)大；然(ran)后(hou)再(zai)通(tong)過低通(tong)濾波器(qi)(qi)(qi)(qi)將(jiang)其(qi)他高(gao)頻(pin)干擾信(xin)(xin)(xin)號(hao)過濾或(huo)者去除；接(jie)著再(zai)通(tong)過反相(xiang)(xiang)比例放(fang)(fang)(fang)(fang)(fang)大器(qi)(qi)(qi)(qi)II將(jiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)還原到最(zui)初(chu)的(de)(de)相(xiang)(xiang)位(因(yin)為(wei)(wei)前后(hou)經(jing)(jing)過了(le)兩次反相(xiang)(xiang)放(fang)(fang)(fang)(fang)(fang)大，因(yin)此經(jing)(jing)過處(chu)(chu)理后(hou)的(de)(de)信(xin)(xin)(xin)號(hao)可(ke)以(yi)(yi)恢復(fu)到原來的(de)(de)正電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)值(zhi)(zhi)(zhi)，同時將(jiang)微弱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)值(zhi)(zhi)(zhi)放(fang)(fang)(fang)(fang)(fang)大了(le))；最(zui)后(hou)再(zai)通(tong)過A/D轉(zhuan)(zhuan)換器(qi)(qi)(qi)(qi)限壓(ya)(ya)(ya)(ya)(ya)轉(zhuan)(zhuan)換將(jiang)外力(li)引起(qi)的(de)(de)并(bing)經(jing)(jing)過處(chu)(chu)理的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)轉(zhuan)(zhuan)換為(wei)(wei)計算機能識別(bie)的(de)(de)數字電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)信(xin)(xin)(xin)號(hao)，當(dang)(dang)然(ran)也可(ke)以(yi)(yi)直接(jie)將(jiang)反相(xiang)(xiang)比例放(fang)(fang)(fang)(fang)(fang)大器(qi)(qi)(qi)(qi)II處(chu)(chu)理后(hou)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)信(xin)(xin)(xin)號(hao)直接(jie)輸(shu)入至可(ke)以(yi)(yi)接(jie)收該(gai)信(xin)(xin)(xin)號(hao)的(de)(de)模擬(ni)顯示(shi)儀器(qi)(qi)(qi)(qi)或(huo)處(chu)(chu)理儀器(qi)(qi)(qi)(qi)例如模擬(ni)信(xin)(xin)(xin)號(hao)示(shi)波顯示(shi)器(qi)(qi)(qi)(qi)或(huo)者模擬(ni)信(xin)(xin)(xin)號(hao)處(chu)(chu)理電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)板。