技術領域

本(ben)發明涉及一(yi)(yi)種傳感器(qi)及其(qi)制(zhi)造(zao)方(fang)法，特別涉及一(yi)(yi)種用(yong)于在(zai)某(mou)一(yi)(yi)狹小接觸(chu)區域中對一(yi)(yi)點接觸(chu)物(wu)體間(jian)的壓力或集中力進(jin)行檢測的柔性單點力片(pian)式傳感器(qi)及其(qi)制(zhi)造(zao)方(fang)法。

背景技術

壓(ya)力(li)(li)傳(chuan)感(gan)(gan)器及(ji)檢(jian)(jian)測技術(shu)在(zai)航(hang)(hang)空(kong)(kong)航(hang)(hang)天、軍(jun)事(shi)工(gong)業、汽車、船舶制(zhi)造、工(gong)業自動化、醫(yi)學研究、生物(wu)醫(yi)療等(deng)(deng)領域中(zhong)發揮著重要的作(zuo)用(yong)(yong)。然(ran)而在(zai)上述應(ying)用(yong)(yong)領域，許多場合需在(zai)某(mou)一狹(xia)小空(kong)(kong)間(jian)(jian)(jian)(jian)中(zhong)對某(mou)一點(dian)接(jie)觸(chu)(chu)(chu)物(wu)體(ti)間(jian)(jian)(jian)(jian)的壓(ya)力(li)(li)或集中(zhong)力(li)(li)進(jin)行檢(jian)(jian)測，例如點(dian)接(jie)觸(chu)(chu)(chu)物(wu)體(ti)間(jian)(jian)(jian)(jian)在(zai)運動過(guo)(guo)程中(zhong)摩(mo)擦(ca)力(li)(li)相互作(zuo)用(yong)(yong)過(guo)(guo)程的研究、例如檢(jian)(jian)測空(kong)(kong)間(jian)(jian)(jian)(jian)凸(tu)輪與滾子從動件處于(yu)點(dian)接(jie)觸(chu)(chu)(chu)狀(zhuang)態下的相互作(zuo)用(yong)(yong)力(li)(li)、檢(jian)(jian)測某(mou)一對牙齒嚙合時(shi)的相互作(zuo)用(yong)(yong)力(li)(li)等(deng)(deng)。由(you)于(yu)受到傳(chuan)感(gan)(gan)器重量(liang)、體(ti)積以及(ji)工(gong)作(zuo)空(kong)(kong)間(jian)(jian)(jian)(jian)(如狹(xia)縫)的限(xian)制(zhi)，這時(shi)傳(chuan)統壓(ya)力(li)(li)傳(chuan)感(gan)(gan)器便不能(neng)用(yong)(yong)于(yu)上述場合下的使用(yong)(yong)來檢(jian)(jian)測某(mou)一點(dian)接(jie)觸(chu)(chu)(chu)物(wu)體(ti)間(jian)(jian)(jian)(jian)的壓(ya)力(li)(li)或集中(zhong)力(li)(li)。即(ji)便勉強使用(yong)(yong)，也不能(neng)滿足操作(zuo)便捷的要求，

發明內容

本(ben)發明針對傳統壓(ya)力(li)傳感器不能(neng)對某(mou)一點(dian)(dian)接(jie)觸(chu)(chu)物體間壓(ya)力(li)進行檢測、體積大、重(zhong)量重(zhong)、操作不方便(bian)的缺點(dian)(dian)；提供(gong)了(le)一種能(neng)夠檢測出某(mou)一點(dian)(dian)接(jie)觸(chu)(chu)物體間壓(ya)力(li)的柔性單(dan)點(dian)(dian)力(li)片式傳感器，該傳感器具(ju)有(you)體積小(xiao)、重(zhong)量輕(qing)、制作簡(jian)單(dan)、可(ke)低成本(ben)批量化生產的特點(dian)(dian)，并且可(ke)重(zhong)復使用、操作簡(jian)便(bian)。

本發明的另一個目(mu)的是提供一種該(gai)傳(chuan)感器的制(zhi)造方(fang)法。

為(wei)達到上述目的，本(ben)發明是采(cai)取如(ru)下技術方案予以(yi)實現的：

一種柔性(xing)單點力片(pian)式傳(chuan)感器，包括壓(ya)敏(min)(min)(min)體、分(fen)別設(she)置在壓(ya)敏(min)(min)(min)體上下(xia)端面的(de)(de)(de)(de)兩(liang)個(ge)電(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)(jie)(jie)片(pian)，其特征在于，還包括有(you)(you)形(xing)狀大(da)小(xiao)相同的(de)(de)(de)(de)上基(ji)板(ban)和下(xia)基(ji)板(ban)，上、下(xia)基(ji)板(ban)之(zhi)間由粘接(jie)(jie)(jie)(jie)(jie)層封接(jie)(jie)(jie)(jie)(jie)；在上基(ji)板(ban)長(chang)度(du)方向的(de)(de)(de)(de)一側(ce)設(she)置有(you)(you)一凸(tu)起(qi)；在相對該凸(tu)起(qi)的(de)(de)(de)(de)下(xia)基(ji)板(ban)上設(she)置有(you)(you)一凹陷(xian)，該凹陷(xian)與所述(shu)凸(tu)起(qi)之(zhi)間形(xing)成一個(ge)密閉的(de)(de)(de)(de)壓(ya)敏(min)(min)(min)體室(shi)(shi)，其中(zhong)封裝(zhuang)有(you)(you)所述(shu)的(de)(de)(de)(de)壓(ya)敏(min)(min)(min)體及電(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)(jie)(jie)片(pian)，所述(shu)壓(ya)敏(min)(min)(min)體室(shi)(shi)的(de)(de)(de)(de)大(da)小(xiao)剛(gang)好(hao)與壓(ya)敏(min)(min)(min)體的(de)(de)(de)(de)大(da)小(xiao)吻合(he)；所述(shu)下(xia)基(ji)板(ban)1沿其長(chang)度(du)方向設(she)置有(you)(you)兩(liang)條相互平行的(de)(de)(de)(de)印刷電(dian)(dian)(dian)極(ji)(ji)6，每個(ge)印刷電(dian)(dian)(dian)極(ji)(ji)分(fen)別連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)(jie)(jie)位于壓(ya)敏(min)(min)(min)體上或(huo)下(xia)端面的(de)(de)(de)(de)電(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)(jie)(jie)片(pian)9和伸出(chu)下(xia)基(ji)板(ban)的(de)(de)(de)(de)電(dian)(dian)(dian)極(ji)(ji)引出(chu)片(pian)3；所述(shu)下(xia)基(ji)板(ban)上的(de)(de)(de)(de)兩(liang)條印刷電(dian)(dian)(dian)極(ji)(ji)6從(cong)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)(jie)(jie)電(dian)(dian)(dian)極(ji)(ji)連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)(jie)(jie)片(pian)9到連(lian)(lian)(lian)(lian)接(jie)(jie)(jie)(jie)(jie)電(dian)(dian)(dian)極(ji)(ji)引出(chu)片(pian)3一段的(de)(de)(de)(de)上表(biao)面設(she)置有(you)(you)電(dian)(dian)(dian)極(ji)(ji)保護膜。

一種上述柔性單點(dian)力片(pian)式(shi)傳感(gan)器的制造方法，其特(te)征(zheng)在于，包括(kuo)如下步(bu)驟：

a.先(xian)制備形狀大小相同的(de)(de)上(shang)(shang)基板(ban)和下基板(ban)，在上(shang)(shang)基板(ban)長(chang)度方(fang)向的(de)(de)一(yi)(yi)側設置一(yi)(yi)凸起(qi)；在相對該(gai)凸起(qi)的(de)(de)下基板(ban)上(shang)(shang)設置一(yi)(yi)凹陷(xian)；

b.將下基(ji)(ji)板(ban)(ban)(ban)1固定在(zai)絲網印(yin)刷機的印(yin)刷臺上，用導(dao)電(dian)料(liao)漿沿(yan)下基(ji)(ji)板(ban)(ban)(ban)長度方向從遠離凹陷一側到凹陷的上表面印(yin)制兩條印(yin)刷電(dian)極(ji)，干燥后(hou)，在(zai)下基(ji)(ji)板(ban)(ban)(ban)遠離凹陷的一側設置兩個外露(lu)的電(dian)極(ji)引出片3。

c.在下基板(ban)凹陷(xian)中涂敷壓(ya)敏(min)(min)電阻(zu)油墨，并放置一個壓(ya)敏(min)(min)體，該(gai)壓(ya)敏(min)(min)體上(shang)、下端面事先分別焊接(jie)(jie)好兩(liang)個電極(ji)連(lian)(lian)(lian)接(jie)(jie)片(pian)9，位于(yu)壓(ya)敏(min)(min)體上(shang)、下端面的(de)(de)兩(liang)電極(ji)連(lian)(lian)(lian)接(jie)(jie)片(pian)9分別連(lian)(lian)(lian)接(jie)(jie)至位于(yu)下基板(ban)上(shang)的(de)(de)兩(liang)條(tiao)印(yin)刷(shua)電極(ji)6的(de)(de)一端，兩(liang)條(tiao)印(yin)刷(shua)電極(ji)6的(de)(de)另一端連(lian)(lian)(lian)接(jie)(jie)外露的(de)(de)兩(liang)個電極(ji)引出片(pian)3；同(tong)時，在上(shang)基板(ban)4的(de)(de)凸起內表面上(shang)涂敷壓(ya)敏(min)(min)電阻(zu)油墨。

d.在下基板的兩(liang)條印刷(shua)電(dian)(dian)極(ji)6上從連接電(dian)(dian)極(ji)連接片(pian)9到連接電(dian)(dian)極(ji)引出片(pian)3的一段(duan)上表面涂敷一層(ceng)電(dian)(dian)極(ji)保護膜并干燥。

e.將(jiang)上、下基板(ban)用粘接層復合，使(shi)所述凸起與凹陷(xian)之間形(xing)成一個(ge)的(de)密閉壓(ya)敏體室(shi)(shi)，將(jiang)壓(ya)敏體及(ji)電極連接片(pian)封(feng)裝(zhuang)在(zai)其內，壓(ya)敏體室(shi)(shi)的(de)大小(xiao)剛好與壓(ya)敏體的(de)大小(xiao)吻合，同時兩條印刷電極相(xiang)互平行(xing)。

以上(shang)方法中(zhong)，所(suo)述(shu)(shu)的(de)印刷電(dian)(dian)(dian)極用(yong)導電(dian)(dian)(dian)漿(jiang)料為(wei)銀導電(dian)(dian)(dian)漿(jiang)料；所(suo)述(shu)(shu)的(de)電(dian)(dian)(dian)極保(bao)護膜材料采(cai)用(yong)羥乙基纖維素；所(suo)述(shu)(shu)的(de)壓敏電(dian)(dian)(dian)阻油墨采(cai)用(yong)碳二硫化鉬油墨；所(suo)述(shu)(shu)的(de)上(shang)、下基板采(cai)用(yong)聚氯(lv)乙烯(xi)材料制成矩形基片；所(suo)述(shu)(shu)的(de)粘接層采(cai)用(yong)環氧樹脂。

本發明(ming)的(de)柔性單(dan)點力片式傳感(gan)器不需(xu)(xu)要外(wai)加保(bao)護裝置，不用將壓敏(min)電(dian)(dian)阻(zu)直接置入被(bei)測(ce)對(dui)(dui)象(xiang)內部(bu)，只(zhi)需(xu)(xu)將被(bei)測(ce)對(dui)(dui)象(xiang)的(de)點接觸部(bu)位與(yu)壓敏(min)電(dian)(dian)阻(zu)所(suo)(suo)對(dui)(dui)應(ying)的(de)壓敏(min)體室(shi)的(de)聚氯乙(yi)(yi)烯PVC絕(jue)(jue)緣(yuan)(yuan)基(ji)片直接接觸即可；同時壓敏(min)電(dian)(dian)阻(zu)材料(liao)在工作(zuo)過(guo)程中始終受到了(le)聚氯乙(yi)(yi)烯PVC片的(de)絕(jue)(jue)緣(yuan)(yuan)保(bao)護。由于(yu)兩(liang)條銀導電(dian)(dian)電(dian)(dian)極(ji)均處于(yu)羥乙(yi)(yi)基(ji)纖維(wei)素HEC的(de)絕(jue)(jue)緣(yuan)(yuan)保(bao)護下，可有效防止兩(liang)電(dian)(dian)極(ji)間(jian)間(jian)距(ju)太小而引(yin)起(qi)的(de)電(dian)(dian)子遷移所(suo)(suo)造成的(de)電(dian)(dian)極(ji)間(jian)短路現象(xiang)。該柔性單(dan)點力片式傳感(gan)器只(zhi)有電(dian)(dian)極(ji)引(yin)出片部(bu)分區域外(wai)露，因此(ci)具有抗強干擾(rao)的(de)優點。

本發明(ming)采用(yong)基于(yu)絲網(wang)印刷工藝(yi)的(de)制造方法，使制得(de)的(de)單(dan)點(dian)力(li)傳感(gan)器具有重量輕、體積小(片(pian)狀)、成(cheng)本低、制作(zuo)簡單(dan)、可(ke)批量化生產(chan)的(de)特點(dian)，并可(ke)重復使用(yong)、操作(zuo)便捷。該(gai)傳感(gan)器可(ke)應(ying)用(yong)于(yu)工作(zuo)空間狹小的(de)某一(yi)點(dian)接觸物體間的(de)壓力(li)或(huo)集(ji)中力(li)的(de)檢測以及類似特殊應(ying)用(yong)場合(he)。

附圖說明

圖1為本發(fa)明(ming)柔性單(dan)點力(li)片式傳感器結構示(shi)意圖。圖中(zhong)：1、下基板；2、粘接層；3、電(dian)極(ji)引出片；4、上基板；5、電(dian)極(ji)保護膜；6、印刷電(dian)極(ji)；7、壓敏體。

圖(tu)2為圖(tu)1的俯視(shi)其及印(yin)刷(shua)電(dian)極的局(ju)部剖視(shi)圖(tu)。圖(tu)中：8、上基板凸起(qi)；9、電(dian)極連(lian)接片。

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

圖4為本(ben)發明柔性單點力(li)片式傳感器一(yi)個應用(yong)實例的測量電路原理圖。

具(ju)體(ti)實施(shi)方式

下面(mian)結合附圖及實施例對本發明作進一(yi)步的(de)詳細說明。

如圖1-圖3所示，一(yi)(yi)種柔性單點(dian)力片(pian)(pian)式傳感器(qi)，包括上(shang)(shang)基(ji)(ji)板(ban)(ban)(ban)(ban)(ban)4和(he)下(xia)(xia)基(ji)(ji)板(ban)(ban)(ban)(ban)(ban)1、壓(ya)敏(min)體(ti)(ti)(ti)7、設置在壓(ya)敏(min)體(ti)(ti)(ti)7垂(chui)直兩端面(mian)的(de)(de)(de)兩個(ge)(ge)(ge)電(dian)(dian)極(ji)(ji)(ji)(ji)連接(jie)(jie)(jie)片(pian)(pian)9，上(shang)(shang)、下(xia)(xia)基(ji)(ji)板(ban)(ban)(ban)(ban)(ban)之間由環氧樹(shu)脂粘接(jie)(jie)(jie)層2封(feng)接(jie)(jie)(jie)；上(shang)(shang)、下(xia)(xia)基(ji)(ji)板(ban)(ban)(ban)(ban)(ban)4、1可由聚氯乙烯(PVC)制成(cheng)相同大小尺寸的(de)(de)(de)矩形基(ji)(ji)片(pian)(pian)；在靠近上(shang)(shang)基(ji)(ji)板(ban)(ban)(ban)(ban)(ban)4長度方(fang)(fang)向的(de)(de)(de)左側設置有(you)(you)一(yi)(yi)凸(tu)起(qi)(qi)8；在相對(dui)該(gai)凸(tu)起(qi)(qi)8的(de)(de)(de)下(xia)(xia)基(ji)(ji)板(ban)(ban)(ban)(ban)(ban)上(shang)(shang)設置有(you)(you)一(yi)(yi)凹(ao)(ao)陷10，該(gai)凹(ao)(ao)陷與凸(tu)起(qi)(qi)之間形成(cheng)一(yi)(yi)個(ge)(ge)(ge)的(de)(de)(de)密閉壓(ya)敏(min)體(ti)(ti)(ti)室，其中封(feng)裝有(you)(you)壓(ya)敏(min)體(ti)(ti)(ti)7及電(dian)(dian)極(ji)(ji)(ji)(ji)連接(jie)(jie)(jie)片(pian)(pian)9，壓(ya)敏(min)體(ti)(ti)(ti)室的(de)(de)(de)大小剛好與壓(ya)敏(min)體(ti)(ti)(ti)7的(de)(de)(de)大小吻合，壓(ya)敏(min)體(ti)(ti)(ti)7為(wei)圓(yuan)片(pian)(pian)或方(fang)(fang)塊形壓(ya)敏(min)電(dian)(dian)阻；下(xia)(xia)基(ji)(ji)板(ban)(ban)(ban)(ban)(ban)1上(shang)(shang)設置有(you)(you)兩條沿其長度方(fang)(fang)向相互(hu)平行的(de)(de)(de)印刷電(dian)(dian)極(ji)(ji)(ji)(ji)6，印刷電(dian)(dian)極(ji)(ji)(ji)(ji)6為(wei)銀導(dao)電(dian)(dian)帶狀(zhuang)薄膜。每條印刷電(dian)(dian)極(ji)(ji)(ji)(ji)在凹(ao)(ao)陷右(you)邊沿處的(de)(de)(de)一(yi)(yi)端連接(jie)(jie)(jie)一(yi)(yi)個(ge)(ge)(ge)電(dian)(dian)極(ji)(ji)(ji)(ji)連接(jie)(jie)(jie)片(pian)(pian)9；遠離凹(ao)(ao)陷到下(xia)(xia)基(ji)(ji)板(ban)(ban)(ban)(ban)(ban)1右(you)側處的(de)(de)(de)另一(yi)(yi)端連接(jie)(jie)(jie)一(yi)(yi)個(ge)(ge)(ge)電(dian)(dian)極(ji)(ji)(ji)(ji)引出片(pian)(pian)3，該(gai)電(dian)(dian)極(ji)(ji)(ji)(ji)引出片(pian)(pian)3外露下(xia)(xia)基(ji)(ji)板(ban)(ban)(ban)(ban)(ban)右(you)側；印刷電(dian)(dian)極(ji)(ji)(ji)(ji)6從連接(jie)(jie)(jie)電(dian)(dian)極(ji)(ji)(ji)(ji)連接(jie)(jie)(jie)片(pian)(pian)9到連接(jie)(jie)(jie)電(dian)(dian)極(ji)(ji)(ji)(ji)引出片(pian)(pian)3的(de)(de)(de)一(yi)(yi)段上(shang)(shang)表面(mian)設置有(you)(you)電(dian)(dian)極(ji)(ji)(ji)(ji)保(bao)護膜5，該(gai)電(dian)(dian)極(ji)(ji)(ji)(ji)保(bao)護膜為(wei)羥(qian)乙基(ji)(ji)纖維(wei)素(HEC)膜層。

以上柔(rou)性單(dan)點力(li)片式(shi)傳(chuan)感器制造(zao)方法，包括下述步驟：

a.先制備(bei)形狀大小相同的(de)上(shang)基板和下基板，在(zai)上(shang)基板長度(du)方向的(de)一側設(she)置一凸(tu)起；在(zai)相對該凸(tu)起的(de)下基板上(shang)設(she)置一凹陷(xian)；

b.將下基板(ban)1固定(ding)在絲(si)網印(yin)刷(shua)機的(de)(de)印(yin)刷(shua)臺上，用(yong)導電料漿沿下基板(ban)長度(du)方向從遠離凹(ao)陷一側到凹(ao)陷的(de)(de)上表(biao)面(mian)印(yin)制(zhi)兩條印(yin)刷(shua)電極，干燥后，在下基板(ban)遠離凹(ao)陷的(de)(de)一側設置兩個外露的(de)(de)電極引出片3。

c.在(zai)下(xia)基(ji)(ji)板(ban)凹(ao)陷中涂敷(fu)(fu)壓(ya)敏(min)電(dian)(dian)阻(zu)油(you)墨，并放置一(yi)(yi)個壓(ya)敏(min)體，該壓(ya)敏(min)體上、下(xia)端(duan)面事(shi)先分別(bie)焊接好兩個電(dian)(dian)極(ji)連接片9，位于壓(ya)敏(min)體上、下(xia)端(duan)面的(de)(de)兩電(dian)(dian)極(ji)連接片9分別(bie)連接至位于下(xia)基(ji)(ji)板(ban)上的(de)(de)兩條印刷(shua)電(dian)(dian)極(ji)6，兩條印刷(shua)電(dian)(dian)極(ji)6的(de)(de)另一(yi)(yi)端(duan)連接外(wai)露的(de)(de)兩個電(dian)(dian)極(ji)引出片3；同(tong)時，在(zai)上基(ji)(ji)板(ban)4的(de)(de)凸起內表面上涂敷(fu)(fu)壓(ya)敏(min)電(dian)(dian)阻(zu)油(you)墨。

d.在(zai)下基板的兩條印(yin)刷電(dian)極(ji)(ji)6上從連(lian)接(jie)電(dian)極(ji)(ji)連(lian)接(jie)片(pian)9到連(lian)接(jie)電(dian)極(ji)(ji)引出片(pian)3的一段上表面涂敷一層電(dian)極(ji)(ji)保(bao)護膜并干燥。

e.將上、下基板用粘接(jie)層(ceng)復合，使所述凸起與凹陷之間形(xing)成一(yi)個的(de)密閉壓敏(min)(min)體(ti)室，將壓敏(min)(min)體(ti)及電(dian)極(ji)連(lian)接(jie)片封裝在其(qi)內，壓敏(min)(min)體(ti)室的(de)大小(xiao)剛(gang)好與壓敏(min)(min)體(ti)的(de)大小(xiao)吻合，同時兩(liang)條印刷電(dian)極(ji)相互平行。

當上述絲網印刷單點力片式傳(chuan)感(gan)(gan)器與外(wai)接(jie)電(dian)(dian)路連接(jie)并通過能正常工作(zuo)的(de)測試后(hou)，該傳(chuan)感(gan)(gan)器外(wai)露(lu)部分電(dian)(dian)極引(yin)出片3與外(wai)接(jie)導線(xian)連接(jie)部分用絕緣(yuan)硅膠將其覆蓋以防(fang)銀(yin)電(dian)(dian)極長(chang)期處(chu)于在(zai)空氣中(zhong)被氧(yang)化而削弱或喪失了其導電(dian)(dian)性能。

本發(fa)明柔性單點(dian)力(li)(li)片式傳(chuan)感器的(de)(de)檢測原理如下：當處(chu)于點(dian)接觸狀態時物體間的(de)(de)一集中(zhong)(zhong)(zhong)載荷(he)(集中(zhong)(zhong)(zhong)力(li)(li))作(zuo)用于壓(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)7上(shang)時，壓(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)因受到了(le)壓(ya)(ya)力(li)(li)作(zuo)用便發(fa)生了(le)一定的(de)(de)壓(ya)(ya)縮變(bian)形，從而引起了(le)壓(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)值(zhi)的(de)(de)變(bian)化，反(fan)映在電(dian)(dian)(dian)(dian)(dian)路上(shang)便是兩銀導電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)極6之(zhi)間電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)值(zhi)的(de)(de)改(gai)變(bian)；根據壓(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)上(shang)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)值(zhi)相對于最初電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)值(zhi)的(de)(de)變(bian)化量便可(ke)反(fan)映出點(dian)接觸處(chu)壓(ya)(ya)力(li)(li)或集中(zhong)(zhong)(zhong)載荷(he)的(de)(de)大小。集中(zhong)(zhong)(zhong)載荷(he)與軸(zhou)向長度、電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)阻(zu)(zu)值(zhi)與軸(zhou)向長度的(de)(de)關系、電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)與電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)的(de)(de)關系如下：

ΔL=FLES---(1)

其(qi)中(zhong)：L——壓(ya)敏電阻的(de)原始(shi)厚度；

S——壓(ya)敏電阻的橫截面面積；

F——作用于壓敏(min)電阻上的集(ji)中載荷；

E——壓敏電(dian)阻的彈性模量；

ΔL——壓敏(min)電(dian)阻油墨厚(hou)度的(de)改變量。

R=ρLS---(2)

其中(zhong)：L——壓敏電(dian)阻油墨的(de)厚度；

S——壓敏電(dian)阻油(you)墨的(de)橫截面面積(ji)；

ρ——壓敏電阻油墨(mo)的電阻率；

R——壓(ya)敏電阻油墨(mo)的電阻值(zhi)。

                U＝IR        (3)

其中：I——流(liu)經壓敏(min)電阻的(de)電流(liu)值；

R——壓敏(min)電(dian)阻油墨(mo)的電(dian)阻值；

U——壓(ya)敏電阻油墨的電壓(ya)值；

如圖4所示，絲網印刷單點力片式傳感(gan)(gan)器(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)因(yin)(yin)(yin)為(wei)只受到(dao)軸(zhou)向壓(ya)(ya)(ya)(ya)(ya)縮變(bian)(bian)形而(er)引起(qi)(qi)了其阻(zu)(zu)(zu)值(zhi)的(de)(de)(de)(de)(de)改(gai)變(bian)(bian)，因(yin)(yin)(yin)此(ci)(ci)在(zai)測(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)可以(yi)(yi)被當(dang)作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中的(de)(de)(de)(de)(de)可變(bian)(bian)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)對待；同(tong)時又由(you)于壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)的(de)(de)(de)(de)(de)改(gai)變(bian)(bian)引起(qi)(qi)了加(jia)在(zai)壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻(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)(de)(de)改(gai)變(bian)(bian)，因(yin)(yin)(yin)此(ci)(ci)壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改(gai)變(bian)(bian)可以(yi)(yi)被當(dang)作(zuo)檢測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)(de)(de)輸入(ru)變(bian)(bian)量(liang)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)。由(you)于單點力傳感(gan)(gan)器(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)因(yin)(yin)(yin)外(wai)(wai)力作(zuo)用而(er)引起(qi)(qi)了加(jia)在(zai)其兩端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改(gai)變(bian)(bian)，反(fan)相比例放(fang)大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)(de)(de)輸入(ru)端(duan)恰好是壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改(gai)變(bian)(bian)端(duan)；因(yin)(yin)(yin)此(ci)(ci)壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改(gai)變(bian)(bian)必然引起(qi)(qi)了反(fan)相比例放(fang)大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)I輸出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)值(zhi)的(de)(de)(de)(de)(de)改(gai)變(bian)(bian)，也就是說單點力傳感(gan)(gan)器(qi)(qi)(qi)(qi)受外(wai)(wai)力作(zuo)用是可以(yi)(yi)引起(qi)(qi)測(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中相應電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改(gai)變(bian)(bian)的(de)(de)(de)(de)(de)。當(dang)外(wai)(wai)力作(zuo)用于單點力傳感(gan)(gan)器(qi)(qi)(qi)(qi)后由(you)于壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)值(zhi)的(de)(de)(de)(de)(de)改(gai)變(bian)(bian)而(er)產生了一定的(de)(de)(de)(de)(de)微(wei)弱電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)，通過(guo)(guo)反(fan)相比例放(fang)大(da)(da)器(qi)(qi)(qi)(qi)I將(jiang)(jiang)該信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)放(fang)大(da)(da)；然后再通過(guo)(guo)低(di)通濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)將(jiang)(jiang)其他高頻(pin)干(gan)擾信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)過(guo)(guo)濾(lv)(lv)或(huo)者去(qu)除；接著再通過(guo)(guo)反(fan)相比例放(fang)大(da)(da)器(qi)(qi)(qi)(qi)II將(jiang)(jiang)電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)還原到(dao)最(zui)初(chu)的(de)(de)(de)(de)(de)相位(因(yin)(yin)(yin)為(wei)前(qian)后經過(guo)(guo)了兩次反(fan)相放(fang)大(da)(da)，因(yin)(yin)(yin)此(ci)(ci)經過(guo)(guo)處(chu)理后的(de)(de)(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)可以(yi)(yi)恢(hui)復(fu)到(dao)原來的(de)(de)(de)(de)(de)正電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)值(zhi)，同(tong)時將(jiang)(jiang)微(wei)弱電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)值(zhi)放(fang)大(da)(da)了)；最(zui)后再通過(guo)(guo)A/D轉換器(qi)(qi)(qi)(qi)限(xian)壓(ya)(ya)(ya)(ya)(ya)轉換將(jiang)(jiang)外(wai)(wai)力引起(qi)(qi)的(de)(de)(de)(de)(de)并經過(guo)(guo)處(chu)理的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)轉換為(wei)計算機能識別的(de)(de)(de)(de)(de)數字電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)，當(dang)然也可以(yi)(yi)直接將(jiang)(jiang)反(fan)相比例放(fang)大(da)(da)器(qi)(qi)(qi)(qi)II處(chu)理后的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)直接輸入(ru)至可以(yi)(yi)接收該信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)的(de)(de)(de)(de)(de)模擬顯(xian)示儀器(qi)(qi)(qi)(qi)或(huo)處(chu)理儀器(qi)(qi)(qi)(qi)例如模擬信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)示波(bo)(bo)顯(xian)示器(qi)(qi)(qi)(qi)或(huo)者模擬信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)處(chu)理電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)板。