技術領域

本(ben)發明(ming)涉及(ji)(ji)一(yi)種(zhong)傳感器及(ji)(ji)其制(zhi)造方法(fa)，特別涉及(ji)(ji)一(yi)種(zhong)用(yong)于在(zai)某一(yi)狹小接觸區域(yu)中對一(yi)點(dian)(dian)接觸物體(ti)間的壓力或集中力進行(xing)檢測的柔性單點(dian)(dian)力片式傳感器及(ji)(ji)其制(zhi)造方法(fa)。

背景技術

壓(ya)力傳(chuan)感器(qi)(qi)及(ji)檢(jian)測(ce)技術(shu)在(zai)航空航天、軍事工(gong)業(ye)、汽車(che)、船(chuan)舶制造(zao)、工(gong)業(ye)自動化、醫學研究(jiu)、生物(wu)醫療等領域中(zhong)發揮著重要(yao)的(de)作(zuo)(zuo)(zuo)用。然而在(zai)上述應用領域，許多場合需(xu)在(zai)某一(yi)狹小(xiao)空間(jian)(jian)中(zhong)對(dui)某一(yi)點(dian)接觸(chu)物(wu)體(ti)間(jian)(jian)的(de)壓(ya)力或集中(zhong)力進行檢(jian)測(ce)，例(li)(li)如點(dian)接觸(chu)物(wu)體(ti)間(jian)(jian)在(zai)運動過程中(zhong)摩擦力相(xiang)(xiang)互作(zuo)(zuo)(zuo)用過程的(de)研究(jiu)、例(li)(li)如檢(jian)測(ce)空間(jian)(jian)凸(tu)輪與滾子從動件處(chu)于點(dian)接觸(chu)狀態下的(de)相(xiang)(xiang)互作(zuo)(zuo)(zuo)用力、檢(jian)測(ce)某一(yi)對(dui)牙齒嚙合時的(de)相(xiang)(xiang)互作(zuo)(zuo)(zuo)用力等。由于受到傳(chuan)感器(qi)(qi)重量、體(ti)積以及(ji)工(gong)作(zuo)(zuo)(zuo)空間(jian)(jian)(如狹縫)的(de)限制，這時傳(chuan)統壓(ya)力傳(chuan)感器(qi)(qi)便不能用于上述場合下的(de)使(shi)用來檢(jian)測(ce)某一(yi)點(dian)接觸(chu)物(wu)體(ti)間(jian)(jian)的(de)壓(ya)力或集中(zhong)力。即(ji)便勉(mian)強(qiang)使(shi)用，也不能滿足操作(zuo)(zuo)(zuo)便捷(jie)的(de)要(yao)求(qiu)，

發明內容

本(ben)發明針對傳(chuan)統壓(ya)力傳(chuan)感器(qi)不能(neng)對某一(yi)點(dian)接觸(chu)物(wu)體間壓(ya)力進行檢測、體積大、重量(liang)(liang)重、操(cao)作不方便(bian)的(de)缺點(dian)；提供了一(yi)種能(neng)夠檢測出某一(yi)點(dian)接觸(chu)物(wu)體間壓(ya)力的(de)柔性單(dan)點(dian)力片式(shi)傳(chuan)感器(qi)，該傳(chuan)感器(qi)具有體積小、重量(liang)(liang)輕、制作簡單(dan)、可低成本(ben)批量(liang)(liang)化生產的(de)特(te)點(dian)，并且可重復使用、操(cao)作簡便(bian)。

本發(fa)明(ming)的另(ling)一個目的是提供一種(zhong)該傳感器的制(zhi)造方(fang)法。

為達(da)到上述目的，本發明(ming)是采取如下技術(shu)方案予以實現(xian)的：

一(yi)種柔性單點力片(pian)(pian)式傳(chuan)感器，包(bao)括壓敏體(ti)(ti)(ti)、分別(bie)設(she)置(zhi)(zhi)在(zai)壓敏體(ti)(ti)(ti)上下(xia)(xia)端面(mian)的(de)(de)兩個(ge)(ge)電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)(jie)片(pian)(pian)，其(qi)特征(zheng)在(zai)于(yu)，還包(bao)括有(you)形(xing)狀大(da)小(xiao)(xiao)相同的(de)(de)上基(ji)(ji)板和下(xia)(xia)基(ji)(ji)板，上、下(xia)(xia)基(ji)(ji)板之間(jian)由粘接(jie)(jie)層(ceng)封(feng)接(jie)(jie)；在(zai)上基(ji)(ji)板長(chang)度方向的(de)(de)一(yi)側設(she)置(zhi)(zhi)有(you)一(yi)凸(tu)起；在(zai)相對(dui)該凸(tu)起的(de)(de)下(xia)(xia)基(ji)(ji)板上設(she)置(zhi)(zhi)有(you)一(yi)凹陷(xian)，該凹陷(xian)與(yu)所(suo)(suo)(suo)述凸(tu)起之間(jian)形(xing)成一(yi)個(ge)(ge)密閉(bi)的(de)(de)壓敏體(ti)(ti)(ti)室(shi)，其(qi)中封(feng)裝(zhuang)有(you)所(suo)(suo)(suo)述的(de)(de)壓敏體(ti)(ti)(ti)及(ji)電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)(jie)片(pian)(pian)，所(suo)(suo)(suo)述壓敏體(ti)(ti)(ti)室(shi)的(de)(de)大(da)小(xiao)(xiao)剛好與(yu)壓敏體(ti)(ti)(ti)的(de)(de)大(da)小(xiao)(xiao)吻合；所(suo)(suo)(suo)述下(xia)(xia)基(ji)(ji)板1沿其(qi)長(chang)度方向設(she)置(zhi)(zhi)有(you)兩條(tiao)相互平行(xing)的(de)(de)印刷(shua)電(dian)(dian)(dian)(dian)極(ji)(ji)6，每個(ge)(ge)印刷(shua)電(dian)(dian)(dian)(dian)極(ji)(ji)分別(bie)連(lian)接(jie)(jie)位(wei)于(yu)壓敏體(ti)(ti)(ti)上或下(xia)(xia)端面(mian)的(de)(de)電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)(jie)片(pian)(pian)9和伸出下(xia)(xia)基(ji)(ji)板的(de)(de)電(dian)(dian)(dian)(dian)極(ji)(ji)引出片(pian)(pian)3；所(suo)(suo)(suo)述下(xia)(xia)基(ji)(ji)板上的(de)(de)兩條(tiao)印刷(shua)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)上表面(mian)設(she)置(zhi)(zhi)有(you)電(dian)(dian)(dian)(dian)極(ji)(ji)保護膜。

一(yi)種(zhong)上述柔性單點力片(pian)式傳感(gan)器(qi)的制造方法，其特征在于，包括如下步驟：

a.先(xian)制備形狀大小(xiao)相(xiang)同的(de)上基(ji)(ji)(ji)板和下基(ji)(ji)(ji)板，在上基(ji)(ji)(ji)板長(chang)度方向的(de)一(yi)側設置(zhi)(zhi)一(yi)凸起；在相(xiang)對該凸起的(de)下基(ji)(ji)(ji)板上設置(zhi)(zhi)一(yi)凹陷；

b.將下基板(ban)1固定在絲網印刷(shua)機的(de)印刷(shua)臺上，用導電料漿沿(yan)下基板(ban)長(chang)度(du)方向從遠離凹陷(xian)一側到凹陷(xian)的(de)上表面印制(zhi)兩條印刷(shua)電極，干(gan)燥后，在下基板(ban)遠離凹陷(xian)的(de)一側設置(zhi)兩個外露的(de)電極引出片3。

c.在(zai)下(xia)基板(ban)凹陷中(zhong)涂敷(fu)壓(ya)敏電(dian)(dian)阻油(you)墨(mo)，并(bing)放置一個(ge)壓(ya)敏體(ti)(ti)，該壓(ya)敏體(ti)(ti)上、下(xia)端(duan)(duan)面事(shi)先分別焊接好兩個(ge)電(dian)(dian)極(ji)(ji)連(lian)接片(pian)9，位于(yu)壓(ya)敏體(ti)(ti)上、下(xia)端(duan)(duan)面的(de)(de)(de)兩電(dian)(dian)極(ji)(ji)連(lian)接片(pian)9分別連(lian)接至位于(yu)下(xia)基板(ban)上的(de)(de)(de)兩條(tiao)印刷電(dian)(dian)極(ji)(ji)6的(de)(de)(de)一端(duan)(duan)，兩條(tiao)印刷電(dian)(dian)極(ji)(ji)6的(de)(de)(de)另一端(duan)(duan)連(lian)接外露的(de)(de)(de)兩個(ge)電(dian)(dian)極(ji)(ji)引出片(pian)3；同時，在(zai)上基板(ban)4的(de)(de)(de)凸起內表面上涂敷(fu)壓(ya)敏電(dian)(dian)阻油(you)墨(mo)。

d.在下基板的兩(liang)條(tiao)印刷電極(ji)(ji)6上(shang)從(cong)連接電極(ji)(ji)連接片9到連接電極(ji)(ji)引出片3的一段上(shang)表面涂敷一層(ceng)電極(ji)(ji)保(bao)護膜并干燥。

e.將上(shang)、下基板用粘接層復合，使所述(shu)凸起與凹陷(xian)之間形成(cheng)一個的(de)(de)密閉(bi)壓(ya)(ya)敏(min)(min)體(ti)(ti)室(shi)，將壓(ya)(ya)敏(min)(min)體(ti)(ti)及(ji)電(dian)極連接片封裝在(zai)其內，壓(ya)(ya)敏(min)(min)體(ti)(ti)室(shi)的(de)(de)大小(xiao)剛(gang)好與壓(ya)(ya)敏(min)(min)體(ti)(ti)的(de)(de)大小(xiao)吻(wen)合，同時(shi)兩條印刷電(dian)極相互平行(xing)。

以(yi)上(shang)方法中，所(suo)(suo)述(shu)的印刷電極(ji)(ji)用導(dao)電漿料為銀(yin)導(dao)電漿料；所(suo)(suo)述(shu)的電極(ji)(ji)保護膜材料采用羥乙基(ji)(ji)纖(xian)維素；所(suo)(suo)述(shu)的壓敏電阻油墨采用碳二(er)硫化鉬油墨；所(suo)(suo)述(shu)的上(shang)、下基(ji)(ji)板采用聚氯乙烯材料制成矩形基(ji)(ji)片(pian)；所(suo)(suo)述(shu)的粘接層采用環氧樹脂。

本發(fa)明的(de)(de)(de)柔性單點(dian)力片(pian)式(shi)傳(chuan)感(gan)器(qi)不(bu)需要外加保(bao)護裝置，不(bu)用將(jiang)壓(ya)敏(min)電阻(zu)直(zhi)接(jie)置入被(bei)測對(dui)象內部，只需將(jiang)被(bei)測對(dui)象的(de)(de)(de)點(dian)接(jie)觸(chu)部位(wei)與壓(ya)敏(min)電阻(zu)所對(dui)應(ying)的(de)(de)(de)壓(ya)敏(min)體(ti)室(shi)的(de)(de)(de)聚氯(lv)乙烯PVC絕緣(yuan)(yuan)基片(pian)直(zhi)接(jie)接(jie)觸(chu)即可；同時(shi)壓(ya)敏(min)電阻(zu)材(cai)料在工(gong)作過程(cheng)中始(shi)終受到了聚氯(lv)乙烯PVC片(pian)的(de)(de)(de)絕緣(yuan)(yuan)保(bao)護。由于(yu)兩條(tiao)銀(yin)導電電極(ji)(ji)均處于(yu)羥乙基纖維素HEC的(de)(de)(de)絕緣(yuan)(yuan)保(bao)護下，可有(you)(you)效防止兩電極(ji)(ji)間間距(ju)太小而(er)引(yin)起(qi)的(de)(de)(de)電子(zi)遷(qian)移所造成的(de)(de)(de)電極(ji)(ji)間短路現象。該(gai)柔性單點(dian)力片(pian)式(shi)傳(chuan)感(gan)器(qi)只有(you)(you)電極(ji)(ji)引(yin)出片(pian)部分區域外露，因此具有(you)(you)抗強干(gan)擾的(de)(de)(de)優點(dian)。

本發明(ming)采(cai)用(yong)基于絲(si)網印刷(shua)工藝的(de)(de)制造方法，使制得的(de)(de)單點(dian)力傳感器具(ju)有重量輕、體積小(片狀)、成(cheng)本低、制作簡單、可(ke)批量化(hua)生(sheng)產的(de)(de)特(te)點(dian)，并可(ke)重復使用(yong)、操(cao)作便(bian)捷。該傳感器可(ke)應用(yong)于工作空間狹小的(de)(de)某一點(dian)接觸(chu)物體間的(de)(de)壓力或集中力的(de)(de)檢測以(yi)及(ji)類(lei)似特(te)殊(shu)應用(yong)場(chang)合。

附圖說明

圖(tu)1為本發明(ming)柔性單點力(li)片(pian)式傳感器(qi)結構示(shi)意圖(tu)。圖(tu)中：1、下基(ji)板；2、粘接(jie)層；3、電極(ji)(ji)引(yin)出(chu)片(pian)；4、上基(ji)板；5、電極(ji)(ji)保護膜(mo)；6、印刷電極(ji)(ji)；7、壓(ya)敏(min)體。

圖(tu)2為(wei)圖(tu)1的俯視(shi)其及(ji)印(yin)刷(shua)電極(ji)的局部剖視(shi)圖(tu)。圖(tu)中：8、上基(ji)板凸(tu)起；9、電極(ji)連接片。

圖3為圖2的剖面圖。圖中(zhong)：10、下基板凹陷。

圖4為本發明柔性單點力片式傳(chuan)感器(qi)一(yi)個應用實(shi)例的(de)測量電路(lu)原理圖。

具體實施(shi)方式

下面結合(he)附圖及實施(shi)例(li)對本發(fa)明(ming)作(zuo)進(jin)一步的詳細說明(ming)。

如圖1-圖3所(suo)示，一(yi)(yi)種柔性單點力片(pian)(pian)式傳感器，包括上(shang)基(ji)板4和下(xia)基(ji)板1、壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)(min)體7、設(she)置(zhi)在壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)(min)體7垂直兩(liang)端(duan)(duan)面的(de)(de)(de)兩(liang)個(ge)電(dian)極(ji)(ji)(ji)(ji)連接(jie)(jie)(jie)(jie)片(pian)(pian)9，上(shang)、下(xia)基(ji)板之間(jian)由環氧樹脂粘接(jie)(jie)(jie)(jie)層2封接(jie)(jie)(jie)(jie)；上(shang)、下(xia)基(ji)板4、1可(ke)由聚氯乙烯(PVC)制成相同(tong)大小尺寸(cun)的(de)(de)(de)矩形(xing)基(ji)片(pian)(pian)；在靠近上(shang)基(ji)板4長(chang)度方(fang)向的(de)(de)(de)左側(ce)設(she)置(zhi)有(you)一(yi)(yi)凸起8；在相對該(gai)(gai)凸起8的(de)(de)(de)下(xia)基(ji)板上(shang)設(she)置(zhi)有(you)一(yi)(yi)凹陷(xian)(xian)(xian)10，該(gai)(gai)凹陷(xian)(xian)(xian)與凸起之間(jian)形(xing)成一(yi)(yi)個(ge)的(de)(de)(de)密(mi)閉(bi)壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)(min)體室(shi)，其(qi)中封裝有(you)壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)(min)體7及電(dian)極(ji)(ji)(ji)(ji)連接(jie)(jie)(jie)(jie)片(pian)(pian)9，壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)(min)體室(shi)的(de)(de)(de)大小剛好與壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)(min)體7的(de)(de)(de)大小吻(wen)合(he)，壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)(min)體7為圓(yuan)片(pian)(pian)或(huo)方(fang)塊形(xing)壓(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)(min)電(dian)阻；下(xia)基(ji)板1上(shang)設(she)置(zhi)有(you)兩(liang)條沿(yan)其(qi)長(chang)度方(fang)向相互平行的(de)(de)(de)印刷(shua)電(dian)極(ji)(ji)(ji)(ji)6，印刷(shua)電(dian)極(ji)(ji)(ji)(ji)6為銀(yin)導電(dian)帶狀薄膜(mo)。每條印刷(shua)電(dian)極(ji)(ji)(ji)(ji)在凹陷(xian)(xian)(xian)右邊沿(yan)處的(de)(de)(de)一(yi)(yi)端(duan)(duan)連接(jie)(jie)(jie)(jie)一(yi)(yi)個(ge)電(dian)極(ji)(ji)(ji)(ji)連接(jie)(jie)(jie)(jie)片(pian)(pian)9；遠離(li)凹陷(xian)(xian)(xian)到下(xia)基(ji)板1右側(ce)處的(de)(de)(de)另一(yi)(yi)端(duan)(duan)連接(jie)(jie)(jie)(jie)一(yi)(yi)個(ge)電(dian)極(ji)(ji)(ji)(ji)引出(chu)片(pian)(pian)3，該(gai)(gai)電(dian)極(ji)(ji)(ji)(ji)引出(chu)片(pian)(pian)3外露下(xia)基(ji)板右側(ce)；印刷(shua)電(dian)極(ji)(ji)(ji)(ji)6從連接(jie)(jie)(jie)(jie)電(dian)極(ji)(ji)(ji)(ji)連接(jie)(jie)(jie)(jie)片(pian)(pian)9到連接(jie)(jie)(jie)(jie)電(dian)極(ji)(ji)(ji)(ji)引出(chu)片(pian)(pian)3的(de)(de)(de)一(yi)(yi)段上(shang)表面設(she)置(zhi)有(you)電(dian)極(ji)(ji)(ji)(ji)保護膜(mo)5，該(gai)(gai)電(dian)極(ji)(ji)(ji)(ji)保護膜(mo)為羥(qian)乙基(ji)纖維素(HEC)膜(mo)層。

以上(shang)柔性(xing)單點力(li)片式傳感器制(zhi)造方(fang)法，包(bao)括下述步驟：

a.先制備(bei)形狀大小相(xiang)同的(de)上(shang)基(ji)板(ban)和下基(ji)板(ban)，在(zai)上(shang)基(ji)板(ban)長(chang)度(du)方向的(de)一(yi)(yi)側設(she)置(zhi)一(yi)(yi)凸起；在(zai)相(xiang)對(dui)該(gai)凸起的(de)下基(ji)板(ban)上(shang)設(she)置(zhi)一(yi)(yi)凹陷；

b.將下基板1固定在絲(si)網印刷機的印刷臺(tai)上，用導電(dian)料漿沿(yan)下基板長度方向(xiang)從遠(yuan)(yuan)離(li)凹(ao)陷一側到凹(ao)陷的上表面印制(zhi)兩條印刷電(dian)極，干燥(zao)后，在下基板遠(yuan)(yuan)離(li)凹(ao)陷的一側設置(zhi)兩個(ge)外露的電(dian)極引出片3。

c.在(zai)下基(ji)板凹陷中涂(tu)敷壓(ya)敏電阻(zu)油(you)墨，并放置(zhi)一(yi)個(ge)壓(ya)敏體(ti)，該(gai)壓(ya)敏體(ti)上、下端面事先分別(bie)焊接(jie)好兩(liang)(liang)個(ge)電極(ji)連(lian)接(jie)片9，位(wei)于(yu)壓(ya)敏體(ti)上、下端面的(de)兩(liang)(liang)電極(ji)連(lian)接(jie)片9分別(bie)連(lian)接(jie)至位(wei)于(yu)下基(ji)板上的(de)兩(liang)(liang)條(tiao)印刷電極(ji)6，兩(liang)(liang)條(tiao)印刷電極(ji)6的(de)另(ling)一(yi)端連(lian)接(jie)外(wai)露的(de)兩(liang)(liang)個(ge)電極(ji)引出片3；同時，在(zai)上基(ji)板4的(de)凸起內表面上涂(tu)敷壓(ya)敏電阻(zu)油(you)墨。

d.在下基板的兩條(tiao)印刷電(dian)極6上從連接電(dian)極連接片9到連接電(dian)極引(yin)出片3的一段上表(biao)面涂敷一層電(dian)極保護膜并干(gan)燥。

e.將上、下基板(ban)用粘(zhan)接層復合(he)，使所(suo)述凸起與(yu)凹陷之間形成一(yi)個(ge)的密閉(bi)壓敏體室，將壓敏體及電極連(lian)接片封裝在(zai)其(qi)內，壓敏體室的大(da)小剛(gang)好與(yu)壓敏體的大(da)小吻合(he)，同時兩條印(yin)刷電極相互平行。

當上述絲網印刷(shua)單點力(li)片式傳感(gan)器與外接電(dian)路連接并通過能(neng)正常(chang)工作的測試后，該傳感(gan)器外露部分電(dian)極引出(chu)片3與外接導(dao)線連接部分用絕緣硅(gui)膠(jiao)將其覆蓋(gai)以防(fang)銀電(dian)極長期處于(yu)在空氣中被氧化(hua)而削弱(ruo)或喪失(shi)了(le)其導(dao)電(dian)性能(neng)。

本發明柔性單點力片(pian)式(shi)傳感器(qi)的(de)檢測(ce)原理如下：當處(chu)于點接觸(chu)狀態(tai)時(shi)物體間的(de)一集中(zhong)載荷(he)(集中(zhong)力)作用于壓(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)阻(zu)7上(shang)時(shi)，壓(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)阻(zu)因受到了(le)(le)壓(ya)(ya)(ya)力作用便(bian)(bian)發生了(le)(le)一定(ding)的(de)壓(ya)(ya)(ya)縮變形，從(cong)而(er)引起(qi)了(le)(le)壓(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)阻(zu)值(zhi)(zhi)的(de)變化，反映在電(dian)(dian)(dian)(dian)(dian)路上(shang)便(bian)(bian)是兩銀導電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)極6之間電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)(zhi)的(de)改變；根據壓(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)阻(zu)上(shang)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)(zhi)相對于最初電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)(zhi)的(de)變化量便(bian)(bian)可反映出點接觸(chu)處(chu)壓(ya)(ya)(ya)力或集中(zhong)載荷(he)的(de)大小。集中(zhong)載荷(he)與(yu)軸向(xiang)長度(du)、電(dian)(dian)(dian)(dian)(dian)阻(zu)阻(zu)值(zhi)(zhi)與(yu)軸向(xiang)長度(du)的(de)關系(xi)、電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)與(yu)電(dian)(dian)(dian)(dian)(dian)阻(zu)的(de)關系(xi)如下：

ΔL=FLES---(1)

其中(zhong)：L——壓敏電阻的原始厚度；

S——壓敏電阻的橫截面(mian)(mian)面(mian)(mian)積；

F——作用于壓敏電阻上的集中載荷；

E——壓(ya)敏(min)電阻的彈性模量；

ΔL——壓敏(min)電阻油墨(mo)厚(hou)度的改(gai)變量。

R=ρLS---(2)

其中：L——壓敏電阻油(you)墨的厚度(du)；

S——壓(ya)敏電阻油(you)墨的橫(heng)截面(mian)面(mian)積(ji)；

ρ——壓敏電阻(zu)油墨的電阻(zu)率；

R——壓敏電阻(zu)油墨的電阻(zu)值。

                U＝IR        (3)

其(qi)中：I——流(liu)經壓敏電(dian)阻的(de)電(dian)流(liu)值；

R——壓敏電阻(zu)油墨的電阻(zu)值；

U——壓敏電(dian)阻(zu)油墨(mo)的電(dian)壓值；

如(ru)圖(tu)4所示(shi)，絲網印刷單(dan)點力(li)(li)(li)片式傳(chuan)(chuan)感器(qi)(qi)(qi)的(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)因(yin)(yin)為只(zhi)受到(dao)(dao)軸向壓(ya)(ya)(ya)(ya)縮變(bian)(bian)(bian)(bian)形(xing)而引(yin)起(qi)(qi)了(le)(le)其阻(zu)(zu)(zu)值(zhi)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)，因(yin)(yin)此在(zai)測(ce)(ce)量電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)可(ke)(ke)(ke)以(yi)被當作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)的(de)(de)(de)(de)(de)可(ke)(ke)(ke)變(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)對待；同(tong)(tong)時又由(you)于壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)引(yin)起(qi)(qi)了(le)(le)加(jia)在(zai)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)兩(liang)端(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)，因(yin)(yin)此壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)端(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)可(ke)(ke)(ke)以(yi)被當作(zuo)檢測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)(de)(de)輸入變(bian)(bian)(bian)(bian)量信(xin)(xin)號(hao)(hao)(hao)(hao)。由(you)于單(dan)點力(li)(li)(li)傳(chuan)(chuan)感器(qi)(qi)(qi)的(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)因(yin)(yin)外(wai)力(li)(li)(li)作(zuo)用(yong)而引(yin)起(qi)(qi)了(le)(le)加(jia)在(zai)其兩(liang)端(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)，反相(xiang)(xiang)(xiang)(xiang)比(bi)例放(fang)(fang)(fang)大(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)(de)(de)輸入端(duan)(duan)恰好(hao)是(shi)(shi)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)端(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)端(duan)(duan)；因(yin)(yin)此壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)端(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)必然(ran)引(yin)起(qi)(qi)了(le)(le)反相(xiang)(xiang)(xiang)(xiang)比(bi)例放(fang)(fang)(fang)大(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)I輸出電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)，也就(jiu)是(shi)(shi)說單(dan)點力(li)(li)(li)傳(chuan)(chuan)感器(qi)(qi)(qi)受外(wai)力(li)(li)(li)作(zuo)用(yong)是(shi)(shi)可(ke)(ke)(ke)以(yi)引(yin)起(qi)(qi)測(ce)(ce)量電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)(zhong)相(xiang)(xiang)(xiang)(xiang)應電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)的(de)(de)(de)(de)(de)。當外(wai)力(li)(li)(li)作(zuo)用(yong)于單(dan)點力(li)(li)(li)傳(chuan)(chuan)感器(qi)(qi)(qi)后(hou)由(you)于壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)值(zhi)的(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)而產生了(le)(le)一定的(de)(de)(de)(de)(de)微弱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)(hao)(hao)，通過反相(xiang)(xiang)(xiang)(xiang)比(bi)例放(fang)(fang)(fang)大(da)器(qi)(qi)(qi)I將(jiang)(jiang)該信(xin)(xin)號(hao)(hao)(hao)(hao)放(fang)(fang)(fang)大(da)；然(ran)后(hou)再通過低(di)通濾波器(qi)(qi)(qi)將(jiang)(jiang)其他(ta)高頻(pin)干(gan)擾(rao)信(xin)(xin)號(hao)(hao)(hao)(hao)過濾或(huo)者去除；接著再通過反相(xiang)(xiang)(xiang)(xiang)比(bi)例放(fang)(fang)(fang)大(da)器(qi)(qi)(qi)II將(jiang)(jiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)(hao)(hao)還原(yuan)到(dao)(dao)最(zui)初的(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)位(wei)(因(yin)(yin)為前后(hou)經過了(le)(le)兩(liang)次反相(xiang)(xiang)(xiang)(xiang)放(fang)(fang)(fang)大(da)，因(yin)(yin)此經過處(chu)(chu)(chu)理(li)后(hou)的(de)(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)(hao)(hao)可(ke)(ke)(ke)以(yi)恢復到(dao)(dao)原(yuan)來的(de)(de)(de)(de)(de)正電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)，同(tong)(tong)時將(jiang)(jiang)微弱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)(hao)(hao)值(zhi)放(fang)(fang)(fang)大(da)了(le)(le))；最(zui)后(hou)再通過A/D轉換(huan)器(qi)(qi)(qi)限壓(ya)(ya)(ya)(ya)轉換(huan)將(jiang)(jiang)外(wai)力(li)(li)(li)引(yin)起(qi)(qi)的(de)(de)(de)(de)(de)并經過處(chu)(chu)(chu)理(li)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)(hao)(hao)轉換(huan)為計算機能識(shi)別的(de)(de)(de)(de)(de)數字電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)信(xin)(xin)號(hao)(hao)(hao)(hao)，當然(ran)也可(ke)(ke)(ke)以(yi)直接將(jiang)(jiang)反相(xiang)(xiang)(xiang)(xiang)比(bi)例放(fang)(fang)(fang)大(da)器(qi)(qi)(qi)II處(chu)(chu)(chu)理(li)后(hou)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)信(xin)(xin)號(hao)(hao)(hao)(hao)直接輸入至可(ke)(ke)(ke)以(yi)接收該信(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)(de)(de)模(mo)擬(ni)(ni)顯(xian)示(shi)儀(yi)器(qi)(qi)(qi)或(huo)處(chu)(chu)(chu)理(li)儀(yi)器(qi)(qi)(qi)例如(ru)模(mo)擬(ni)(ni)信(xin)(xin)號(hao)(hao)(hao)(hao)示(shi)波顯(xian)示(shi)器(qi)(qi)(qi)或(huo)者模(mo)擬(ni)(ni)信(xin)(xin)號(hao)(hao)(hao)(hao)處(chu)(chu)(chu)理(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)板。