技術領域

本發明涉及(ji)一種傳感器及(ji)其(qi)制(zhi)造(zao)方(fang)法(fa)，特別(bie)涉及(ji)一種用于(yu)在某一狹小接觸(chu)區域中對一點接觸(chu)物體間的(de)壓(ya)力(li)或集中力(li)進行檢測的(de)柔(rou)性單點力(li)片式傳感器及(ji)其(qi)制(zhi)造(zao)方(fang)法(fa)。

背景技術

壓力(li)傳(chuan)感(gan)器(qi)及(ji)檢測(ce)技(ji)術在(zai)航空(kong)航天、軍事工(gong)業、汽車、船舶(bo)制(zhi)造、工(gong)業自動(dong)(dong)化(hua)、醫(yi)(yi)學(xue)研(yan)究、生物(wu)醫(yi)(yi)療等領(ling)域中(zhong)發揮(hui)著(zhu)重要(yao)的(de)作(zuo)用。然而(er)在(zai)上述(shu)應用領(ling)域，許多場合(he)需在(zai)某一(yi)(yi)狹小空(kong)間(jian)中(zhong)對某一(yi)(yi)點(dian)接(jie)觸物(wu)體間(jian)的(de)壓力(li)或集(ji)中(zhong)力(li)進行檢測(ce)，例(li)如(ru)點(dian)接(jie)觸物(wu)體間(jian)在(zai)運動(dong)(dong)過程(cheng)中(zhong)摩擦力(li)相互(hu)(hu)作(zuo)用過程(cheng)的(de)研(yan)究、例(li)如(ru)檢測(ce)空(kong)間(jian)凸輪與滾子從動(dong)(dong)件處(chu)于(yu)點(dian)接(jie)觸狀態下的(de)相互(hu)(hu)作(zuo)用力(li)、檢測(ce)某一(yi)(yi)對牙齒嚙合(he)時的(de)相互(hu)(hu)作(zuo)用力(li)等。由于(yu)受到傳(chuan)感(gan)器(qi)重量(liang)、體積以及(ji)工(gong)作(zuo)空(kong)間(jian)(如(ru)狹縫)的(de)限制(zhi)，這時傳(chuan)統壓力(li)傳(chuan)感(gan)器(qi)便(bian)不能(neng)用于(yu)上述(shu)場合(he)下的(de)使(shi)用來檢測(ce)某一(yi)(yi)點(dian)接(jie)觸物(wu)體間(jian)的(de)壓力(li)或集(ji)中(zhong)力(li)。即便(bian)勉強(qiang)使(shi)用，也不能(neng)滿(man)足操作(zuo)便(bian)捷(jie)的(de)要(yao)求(qiu)，

發明內容

本發明針(zhen)對(dui)傳(chuan)統壓力傳(chuan)感器(qi)不能(neng)對(dui)某一點(dian)接(jie)(jie)觸(chu)物體(ti)間(jian)壓力進(jin)行檢(jian)測(ce)、體(ti)積大、重(zhong)量(liang)重(zhong)、操(cao)作不方便(bian)的缺點(dian)；提(ti)供(gong)了一種(zhong)能(neng)夠檢(jian)測(ce)出某一點(dian)接(jie)(jie)觸(chu)物體(ti)間(jian)壓力的柔性單點(dian)力片(pian)式傳(chuan)感器(qi)，該傳(chuan)感器(qi)具有體(ti)積小、重(zhong)量(liang)輕、制(zhi)作簡單、可(ke)(ke)低(di)成(cheng)本批(pi)量(liang)化生產的特點(dian)，并且可(ke)(ke)重(zhong)復使用、操(cao)作簡便(bian)。

本發明的(de)另(ling)一個目的(de)是提供一種該傳感器(qi)的(de)制造方(fang)法。

為(wei)達到上述目的，本發明是采取如下技術方(fang)案予以實現的：

一(yi)(yi)種柔性單點力片(pian)式傳感器，包括壓(ya)敏體、分別設置(zhi)(zhi)(zhi)(zhi)在(zai)壓(ya)敏體上(shang)(shang)下(xia)端面(mian)的(de)(de)(de)兩(liang)(liang)個電(dian)(dian)極(ji)(ji)(ji)(ji)連(lian)(lian)接(jie)片(pian)，其(qi)(qi)特征在(zai)于，還包括有形狀大小相同的(de)(de)(de)上(shang)(shang)基板(ban)(ban)和(he)下(xia)基板(ban)(ban)，上(shang)(shang)、下(xia)基板(ban)(ban)之間由粘接(jie)層(ceng)封接(jie)；在(zai)上(shang)(shang)基板(ban)(ban)長度(du)方向的(de)(de)(de)一(yi)(yi)側設置(zhi)(zhi)(zhi)(zhi)有一(yi)(yi)凸起；在(zai)相對該凸起的(de)(de)(de)下(xia)基板(ban)(ban)上(shang)(shang)設置(zhi)(zhi)(zhi)(zhi)有一(yi)(yi)凹陷(xian)，該凹陷(xian)與(yu)(yu)所(suo)述(shu)(shu)凸起之間形成一(yi)(yi)個密閉的(de)(de)(de)壓(ya)敏體室，其(qi)(qi)中封裝有所(suo)述(shu)(shu)的(de)(de)(de)壓(ya)敏體及電(dian)(dian)極(ji)(ji)(ji)(ji)連(lian)(lian)接(jie)片(pian)，所(suo)述(shu)(shu)壓(ya)敏體室的(de)(de)(de)大小剛好與(yu)(yu)壓(ya)敏體的(de)(de)(de)大小吻合；所(suo)述(shu)(shu)下(xia)基板(ban)(ban)1沿其(qi)(qi)長度(du)方向設置(zhi)(zhi)(zhi)(zhi)有兩(liang)(liang)條(tiao)相互平行的(de)(de)(de)印(yin)刷(shua)電(dian)(dian)極(ji)(ji)(ji)(ji)6，每個印(yin)刷(shua)電(dian)(dian)極(ji)(ji)(ji)(ji)分別連(lian)(lian)接(jie)位于壓(ya)敏體上(shang)(shang)或下(xia)端面(mian)的(de)(de)(de)電(dian)(dian)極(ji)(ji)(ji)(ji)連(lian)(lian)接(jie)片(pian)9和(he)伸出(chu)下(xia)基板(ban)(ban)的(de)(de)(de)電(dian)(dian)極(ji)(ji)(ji)(ji)引(yin)出(chu)片(pian)3；所(suo)述(shu)(shu)下(xia)基板(ban)(ban)上(shang)(shang)的(de)(de)(de)兩(liang)(liang)條(tiao)印(yin)刷(shua)電(dian)(dian)極(ji)(ji)(ji)(ji)6從連(lian)(lian)接(jie)電(dian)(dian)極(ji)(ji)(ji)(ji)連(lian)(lian)接(jie)片(pian)9到連(lian)(lian)接(jie)電(dian)(dian)極(ji)(ji)(ji)(ji)引(yin)出(chu)片(pian)3一(yi)(yi)段的(de)(de)(de)上(shang)(shang)表(biao)面(mian)設置(zhi)(zhi)(zhi)(zhi)有電(dian)(dian)極(ji)(ji)(ji)(ji)保護膜。

一(yi)種上述(shu)柔(rou)性單點(dian)力片式傳感器(qi)的制(zhi)造方法，其特征在于，包括如(ru)下步驟：

a.先(xian)制備形狀(zhuang)大(da)小(xiao)相同的上(shang)基板和(he)下(xia)基板，在上(shang)基板長(chang)度方向的一側設置(zhi)(zhi)一凸起(qi)；在相對該凸起(qi)的下(xia)基板上(shang)設置(zhi)(zhi)一凹陷；

b.將(jiang)下基板(ban)1固定在(zai)(zai)絲網印刷機的印刷臺上(shang)，用導電(dian)料漿沿(yan)下基板(ban)長度方向(xiang)從遠離(li)凹陷(xian)(xian)一(yi)側(ce)到凹陷(xian)(xian)的上(shang)表面印制兩(liang)條印刷電(dian)極，干燥后，在(zai)(zai)下基板(ban)遠離(li)凹陷(xian)(xian)的一(yi)側(ce)設置兩(liang)個外(wai)露的電(dian)極引出(chu)片3。

c.在下(xia)(xia)(xia)基板(ban)凹(ao)陷中涂敷(fu)(fu)壓(ya)敏電阻油(you)墨，并放置一(yi)個(ge)(ge)壓(ya)敏體，該壓(ya)敏體上、下(xia)(xia)(xia)端面(mian)(mian)事先(xian)分別焊接好兩個(ge)(ge)電極(ji)連接片(pian)(pian)9，位(wei)于壓(ya)敏體上、下(xia)(xia)(xia)端面(mian)(mian)的(de)(de)兩電極(ji)連接片(pian)(pian)9分別連接至位(wei)于下(xia)(xia)(xia)基板(ban)上的(de)(de)兩條印刷電極(ji)6的(de)(de)一(yi)端，兩條印刷電極(ji)6的(de)(de)另(ling)一(yi)端連接外露的(de)(de)兩個(ge)(ge)電極(ji)引出片(pian)(pian)3；同時，在上基板(ban)4的(de)(de)凸起內表面(mian)(mian)上涂敷(fu)(fu)壓(ya)敏電阻油(you)墨。

d.在下基板的兩(liang)條印刷電極6上(shang)從連(lian)接(jie)電極連(lian)接(jie)片9到連(lian)接(jie)電極引出片3的一段上(shang)表面涂(tu)敷一層電極保護膜并干燥(zao)。

e.將(jiang)上、下基板用粘(zhan)接層復合(he)，使所述凸起(qi)與(yu)凹陷(xian)之間形成一個的(de)密(mi)閉(bi)壓(ya)敏體室，將(jiang)壓(ya)敏體及電極連接片封裝在其內(nei)，壓(ya)敏體室的(de)大小剛好與(yu)壓(ya)敏體的(de)大小吻合(he)，同(tong)時兩(liang)條印刷(shua)電極相(xiang)互平(ping)行。

以上方法中，所(suo)述(shu)的印(yin)刷電極用(yong)(yong)導電漿料為銀導電漿料；所(suo)述(shu)的電極保護膜材料采用(yong)(yong)羥乙基(ji)纖維(wei)素(su)；所(suo)述(shu)的壓(ya)敏電阻(zu)油墨采用(yong)(yong)碳(tan)二硫化鉬(mu)油墨；所(suo)述(shu)的上、下基(ji)板采用(yong)(yong)聚氯乙烯材料制(zhi)成(cheng)矩形基(ji)片；所(suo)述(shu)的粘接層采用(yong)(yong)環氧(yang)樹脂(zhi)。

本發明的(de)(de)(de)(de)柔性(xing)單(dan)點力(li)片(pian)(pian)式傳感(gan)器(qi)不需要外加保護(hu)裝置，不用(yong)將壓(ya)敏(min)電(dian)阻直接(jie)置入被測對(dui)(dui)象(xiang)內部(bu)(bu)(bu)，只需將被測對(dui)(dui)象(xiang)的(de)(de)(de)(de)點接(jie)觸(chu)部(bu)(bu)(bu)位與壓(ya)敏(min)電(dian)阻所(suo)(suo)對(dui)(dui)應的(de)(de)(de)(de)壓(ya)敏(min)體室的(de)(de)(de)(de)聚氯乙烯(xi)PVC絕緣基片(pian)(pian)直接(jie)接(jie)觸(chu)即可；同時壓(ya)敏(min)電(dian)阻材料在工作(zuo)過程(cheng)中始終受到了聚氯乙烯(xi)PVC片(pian)(pian)的(de)(de)(de)(de)絕緣保護(hu)。由于兩(liang)條(tiao)銀(yin)導(dao)電(dian)電(dian)極(ji)均處于羥乙基纖(xian)維素HEC的(de)(de)(de)(de)絕緣保護(hu)下，可有(you)效防(fang)止兩(liang)電(dian)極(ji)間間距太小(xiao)而引(yin)起的(de)(de)(de)(de)電(dian)子遷移所(suo)(suo)造成(cheng)的(de)(de)(de)(de)電(dian)極(ji)間短路現象(xiang)。該(gai)柔性(xing)單(dan)點力(li)片(pian)(pian)式傳感(gan)器(qi)只有(you)電(dian)極(ji)引(yin)出片(pian)(pian)部(bu)(bu)(bu)分區域外露，因(yin)此具有(you)抗強干擾的(de)(de)(de)(de)優點。

本發(fa)明采用基于絲網印刷工藝的(de)制(zhi)造方(fang)法(fa)，使(shi)制(zhi)得的(de)單(dan)點(dian)力傳感(gan)器具(ju)有重量輕、體(ti)積小(xiao)(片狀)、成本低(di)、制(zhi)作簡(jian)單(dan)、可(ke)批(pi)量化生產(chan)的(de)特點(dian)，并可(ke)重復使(shi)用、操作便捷(jie)。該(gai)傳感(gan)器可(ke)應用于工作空間狹(xia)小(xiao)的(de)某(mou)一點(dian)接觸物(wu)體(ti)間的(de)壓力或(huo)集中力的(de)檢測以及(ji)類似特殊應用場合。

附圖說明

圖(tu)1為(wei)本(ben)發明柔性(xing)單點力片式傳(chuan)感(gan)器結構示意圖(tu)。圖(tu)中：1、下基板(ban)；2、粘接層；3、電(dian)極引出(chu)片；4、上(shang)基板(ban)；5、電(dian)極保護膜；6、印刷電(dian)極；7、壓敏體。

圖2為圖1的(de)(de)俯視其及印(yin)刷電極(ji)(ji)的(de)(de)局部(bu)剖(pou)視圖。圖中：8、上基板凸起；9、電極(ji)(ji)連接片。

圖(tu)(tu)3為(wei)圖(tu)(tu)2的剖面(mian)圖(tu)(tu)。圖(tu)(tu)中：10、下(xia)基板凹(ao)陷。

圖4為本發明柔性單點(dian)力(li)片式傳(chuan)感器一(yi)個(ge)應用實例的測(ce)量電路原理圖。

具體(ti)實施方式

下面結合附圖及實(shi)施例對本發(fa)明(ming)作(zuo)進一步的(de)詳(xiang)細(xi)說(shuo)明(ming)。

如圖1-圖3所示，一(yi)種(zhong)柔性單點(dian)力片(pian)(pian)式傳感器，包括上(shang)基(ji)(ji)(ji)板(ban)(ban)(ban)4和(he)下基(ji)(ji)(ji)板(ban)(ban)(ban)1、壓(ya)敏(min)(min)體(ti)7、設(she)(she)置(zhi)在壓(ya)敏(min)(min)體(ti)7垂直兩(liang)(liang)(liang)端(duan)(duan)面的(de)(de)兩(liang)(liang)(liang)個電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)(jie)片(pian)(pian)9，上(shang)、下基(ji)(ji)(ji)板(ban)(ban)(ban)之(zhi)間由環(huan)氧樹(shu)脂粘(zhan)接(jie)(jie)層(ceng)2封(feng)接(jie)(jie)；上(shang)、下基(ji)(ji)(ji)板(ban)(ban)(ban)4、1可由聚氯乙烯(PVC)制成相同大小尺寸的(de)(de)矩形(xing)基(ji)(ji)(ji)片(pian)(pian)；在靠近上(shang)基(ji)(ji)(ji)板(ban)(ban)(ban)4長度方(fang)向(xiang)的(de)(de)左(zuo)側設(she)(she)置(zhi)有(you)一(yi)凸(tu)起(qi)8；在相對該(gai)凸(tu)起(qi)8的(de)(de)下基(ji)(ji)(ji)板(ban)(ban)(ban)上(shang)設(she)(she)置(zhi)有(you)一(yi)凹陷(xian)10，該(gai)凹陷(xian)與(yu)凸(tu)起(qi)之(zhi)間形(xing)成一(yi)個的(de)(de)密閉(bi)壓(ya)敏(min)(min)體(ti)室，其中封(feng)裝(zhuang)有(you)壓(ya)敏(min)(min)體(ti)7及電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)(jie)片(pian)(pian)9，壓(ya)敏(min)(min)體(ti)室的(de)(de)大小剛(gang)好與(yu)壓(ya)敏(min)(min)體(ti)7的(de)(de)大小吻合(he)，壓(ya)敏(min)(min)體(ti)7為圓片(pian)(pian)或方(fang)塊形(xing)壓(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻；下基(ji)(ji)(ji)板(ban)(ban)(ban)1上(shang)設(she)(she)置(zhi)有(you)兩(liang)(liang)(liang)條沿其長度方(fang)向(xiang)相互平行的(de)(de)印(yin)刷(shua)電(dian)(dian)(dian)(dian)極(ji)(ji)6，印(yin)刷(shua)電(dian)(dian)(dian)(dian)極(ji)(ji)6為銀導(dao)電(dian)(dian)(dian)(dian)帶(dai)狀薄(bo)膜。每條印(yin)刷(shua)電(dian)(dian)(dian)(dian)極(ji)(ji)在凹陷(xian)右(you)邊(bian)沿處的(de)(de)一(yi)端(duan)(duan)連(lian)接(jie)(jie)一(yi)個電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)(jie)片(pian)(pian)9；遠(yuan)離凹陷(xian)到(dao)下基(ji)(ji)(ji)板(ban)(ban)(ban)1右(you)側處的(de)(de)另一(yi)端(duan)(duan)連(lian)接(jie)(jie)一(yi)個電(dian)(dian)(dian)(dian)極(ji)(ji)引(yin)出片(pian)(pian)3，該(gai)電(dian)(dian)(dian)(dian)極(ji)(ji)引(yin)出片(pian)(pian)3外露下基(ji)(ji)(ji)板(ban)(ban)(ban)右(you)側；印(yin)刷(shua)電(dian)(dian)(dian)(dian)極(ji)(ji)6從(cong)連(lian)接(jie)(jie)電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)(jie)片(pian)(pian)9到(dao)連(lian)接(jie)(jie)電(dian)(dian)(dian)(dian)極(ji)(ji)引(yin)出片(pian)(pian)3的(de)(de)一(yi)段(duan)上(shang)表面設(she)(she)置(zhi)有(you)電(dian)(dian)(dian)(dian)極(ji)(ji)保護膜5，該(gai)電(dian)(dian)(dian)(dian)極(ji)(ji)保護膜為羥乙基(ji)(ji)(ji)纖(xian)維素(HEC)膜層(ceng)。

以上柔性(xing)單點力(li)片式傳感器制造方法，包(bao)括(kuo)下(xia)述步驟：

a.先制備形狀大小相(xiang)同的(de)上基(ji)板(ban)和下(xia)基(ji)板(ban)，在上基(ji)板(ban)長(chang)度(du)方向的(de)一(yi)側設(she)置(zhi)一(yi)凸起；在相(xiang)對該凸起的(de)下(xia)基(ji)板(ban)上設(she)置(zhi)一(yi)凹陷；

b.將下基板1固定在(zai)絲網印刷(shua)機的(de)(de)印刷(shua)臺上，用導電(dian)(dian)料漿沿(yan)下基板長度方向從遠(yuan)離(li)凹陷一側到(dao)凹陷的(de)(de)上表面印制兩條印刷(shua)電(dian)(dian)極，干燥(zao)后，在(zai)下基板遠(yuan)離(li)凹陷的(de)(de)一側設置兩個(ge)外露(lu)的(de)(de)電(dian)(dian)極引出片3。

c.在下基板凹陷中涂(tu)敷壓(ya)敏(min)電(dian)(dian)(dian)(dian)阻(zu)油墨，并放置一個壓(ya)敏(min)體，該壓(ya)敏(min)體上(shang)(shang)、下端(duan)面(mian)事先(xian)分別焊接好(hao)兩(liang)(liang)個電(dian)(dian)(dian)(dian)極(ji)連(lian)接片(pian)(pian)9，位(wei)于(yu)壓(ya)敏(min)體上(shang)(shang)、下端(duan)面(mian)的兩(liang)(liang)電(dian)(dian)(dian)(dian)極(ji)連(lian)接片(pian)(pian)9分別連(lian)接至位(wei)于(yu)下基板上(shang)(shang)的兩(liang)(liang)條印刷(shua)電(dian)(dian)(dian)(dian)極(ji)6，兩(liang)(liang)條印刷(shua)電(dian)(dian)(dian)(dian)極(ji)6的另一端(duan)連(lian)接外(wai)露(lu)的兩(liang)(liang)個電(dian)(dian)(dian)(dian)極(ji)引出(chu)片(pian)(pian)3；同時，在上(shang)(shang)基板4的凸起內表面(mian)上(shang)(shang)涂(tu)敷壓(ya)敏(min)電(dian)(dian)(dian)(dian)阻(zu)油墨。

d.在(zai)下基板的兩條印刷電(dian)極(ji)6上(shang)從連(lian)接(jie)電(dian)極(ji)連(lian)接(jie)片9到連(lian)接(jie)電(dian)極(ji)引出(chu)片3的一(yi)段(duan)上(shang)表面涂(tu)敷(fu)一(yi)層電(dian)極(ji)保護膜并干燥。

e.將上、下基板用粘(zhan)接層復(fu)合(he)，使所述凸起與凹(ao)陷之間形成一個的(de)密閉壓(ya)(ya)敏體室，將壓(ya)(ya)敏體及電極連接片封裝在(zai)其內，壓(ya)(ya)敏體室的(de)大(da)小(xiao)剛好與壓(ya)(ya)敏體的(de)大(da)小(xiao)吻(wen)合(he)，同時兩(liang)條印(yin)刷電極相互平(ping)行。

當上述絲網(wang)印刷單點力(li)片(pian)式傳感器與(yu)(yu)外(wai)接(jie)電(dian)(dian)路連接(jie)并通過能正常工(gong)作的測(ce)試后，該傳感器外(wai)露部分電(dian)(dian)極(ji)引(yin)出片(pian)3與(yu)(yu)外(wai)接(jie)導線(xian)連接(jie)部分用絕(jue)緣硅膠(jiao)將其覆(fu)蓋(gai)以(yi)防銀電(dian)(dian)極(ji)長期處于在空氣(qi)中被(bei)氧(yang)化(hua)而削弱(ruo)或(huo)喪失了其導電(dian)(dian)性能。

本發(fa)(fa)明柔性單點(dian)力片式(shi)傳感器的(de)(de)檢測原(yuan)理(li)如下(xia)：當處于點(dian)接觸狀態時(shi)物(wu)體間(jian)(jian)的(de)(de)一集(ji)(ji)中(zhong)載荷(集(ji)(ji)中(zhong)力)作用于壓(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)阻(zu)7上(shang)時(shi)，壓(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)阻(zu)因受到了壓(ya)(ya)力作用便發(fa)(fa)生了一定(ding)的(de)(de)壓(ya)(ya)縮變(bian)形，從而引起了壓(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)阻(zu)值(zhi)(zhi)的(de)(de)變(bian)化，反(fan)映(ying)在電(dian)(dian)(dian)(dian)路上(shang)便是(shi)兩銀導(dao)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)極6之(zhi)間(jian)(jian)電(dian)(dian)(dian)(dian)壓(ya)(ya)值(zhi)(zhi)的(de)(de)改變(bian)；根據壓(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)阻(zu)上(shang)電(dian)(dian)(dian)(dian)壓(ya)(ya)值(zhi)(zhi)相(xiang)對于最初電(dian)(dian)(dian)(dian)壓(ya)(ya)值(zhi)(zhi)的(de)(de)變(bian)化量便可反(fan)映(ying)出點(dian)接觸處壓(ya)(ya)力或集(ji)(ji)中(zhong)載荷的(de)(de)大小(xiao)。集(ji)(ji)中(zhong)載荷與軸向(xiang)長(chang)度、電(dian)(dian)(dian)(dian)阻(zu)阻(zu)值(zhi)(zhi)與軸向(xiang)長(chang)度的(de)(de)關(guan)系、電(dian)(dian)(dian)(dian)壓(ya)(ya)與電(dian)(dian)(dian)(dian)阻(zu)的(de)(de)關(guan)系如下(xia)：

ΔL=FLES---(1)

其(qi)中：L——壓敏電阻的原始厚(hou)度；

S——壓敏電(dian)阻的橫(heng)截面(mian)面(mian)積；

F——作用于壓(ya)敏電阻上(shang)的集(ji)中載(zai)荷；

E——壓(ya)敏(min)電阻的(de)彈性模量；

ΔL——壓敏電阻油墨(mo)厚度的改變(bian)量。

R=ρLS---(2)

其中：L——壓(ya)敏電阻油墨的厚(hou)度(du)；

S——壓敏電阻(zu)油(you)墨的橫截(jie)面面積(ji)；

ρ——壓(ya)敏電(dian)阻油(you)墨的電(dian)阻率；

R——壓敏電阻(zu)油(you)墨的電阻(zu)值。

                U＝IR        (3)

其中：I——流(liu)經(jing)壓敏(min)電阻(zu)的(de)電流(liu)值；

R——壓敏電(dian)阻油墨的電(dian)阻值；

U——壓敏電阻油墨的(de)電壓值；

如(ru)圖(tu)4所示(shi)，絲網(wang)印(yin)刷(shua)單(dan)(dan)點(dian)力片式傳感(gan)器的(de)(de)(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)因(yin)為只受(shou)到(dao)軸向壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)縮變(bian)(bian)形而引起(qi)(qi)了其(qi)(qi)阻(zu)(zu)值(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)，因(yin)此(ci)在(zai)測(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路中(zhong)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)可(ke)(ke)(ke)以(yi)(yi)被(bei)當(dang)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路中(zhong)的(de)(de)(de)(de)(de)(de)(de)可(ke)(ke)(ke)變(bian)(bian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)對待；同(tong)時又由于(yu)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)引起(qi)(qi)了加在(zai)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)兩端(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)值(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)，因(yin)此(ci)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)端(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)可(ke)(ke)(ke)以(yi)(yi)被(bei)當(dang)作(zuo)(zuo)檢(jian)測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路的(de)(de)(de)(de)(de)(de)(de)輸(shu)入(ru)變(bian)(bian)量(liang)信(xin)號(hao)(hao)。由于(yu)單(dan)(dan)點(dian)力傳感(gan)器的(de)(de)(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)因(yin)外力作(zuo)(zuo)用(yong)而引起(qi)(qi)了加在(zai)其(qi)(qi)兩端(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)，反(fan)(fan)相(xiang)(xiang)比例(li)放(fang)(fang)大電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路的(de)(de)(de)(de)(de)(de)(de)輸(shu)入(ru)端(duan)(duan)(duan)恰好是壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)端(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)端(duan)(duan)(duan)；因(yin)此(ci)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)端(duan)(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)必然(ran)引起(qi)(qi)了反(fan)(fan)相(xiang)(xiang)比例(li)放(fang)(fang)大電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路I輸(shu)出電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)值(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)，也(ye)就是說單(dan)(dan)點(dian)力傳感(gan)器受(shou)外力作(zuo)(zuo)用(yong)是可(ke)(ke)(ke)以(yi)(yi)引起(qi)(qi)測(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路中(zhong)相(xiang)(xiang)應電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)的(de)(de)(de)(de)(de)(de)(de)。當(dang)外力作(zuo)(zuo)用(yong)于(yu)單(dan)(dan)點(dian)力傳感(gan)器后由于(yu)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)值(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)而產(chan)生了一定(ding)的(de)(de)(de)(de)(de)(de)(de)微(wei)(wei)弱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)號(hao)(hao)，通(tong)過(guo)反(fan)(fan)相(xiang)(xiang)比例(li)放(fang)(fang)大器I將該信(xin)號(hao)(hao)放(fang)(fang)大；然(ran)后再通(tong)過(guo)低通(tong)濾(lv)(lv)波器將其(qi)(qi)他高頻干擾信(xin)號(hao)(hao)過(guo)濾(lv)(lv)或者去除(chu)；接(jie)(jie)著再通(tong)過(guo)反(fan)(fan)相(xiang)(xiang)比例(li)放(fang)(fang)大器II將電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)號(hao)(hao)還原到(dao)最初的(de)(de)(de)(de)(de)(de)(de)相(xiang)(xiang)位(因(yin)為前后經(jing)過(guo)了兩次反(fan)(fan)相(xiang)(xiang)放(fang)(fang)大，因(yin)此(ci)經(jing)過(guo)處理(li)后的(de)(de)(de)(de)(de)(de)(de)信(xin)號(hao)(hao)可(ke)(ke)(ke)以(yi)(yi)恢復到(dao)原來(lai)的(de)(de)(de)(de)(de)(de)(de)正電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)值(zhi)(zhi)，同(tong)時將微(wei)(wei)弱電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)號(hao)(hao)值(zhi)(zhi)放(fang)(fang)大了)；最后再通(tong)過(guo)A/D轉(zhuan)(zhuan)換器限壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)轉(zhuan)(zhuan)換將外力引起(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)并經(jing)過(guo)處理(li)的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)信(xin)號(hao)(hao)轉(zhuan)(zhuan)換為計算(suan)機能識別的(de)(de)(de)(de)(de)(de)(de)數字電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)信(xin)號(hao)(hao)，當(dang)然(ran)也(ye)可(ke)(ke)(ke)以(yi)(yi)直(zhi)接(jie)(jie)將反(fan)(fan)相(xiang)(xiang)比例(li)放(fang)(fang)大器II處理(li)后的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)信(xin)號(hao)(hao)直(zhi)接(jie)(jie)輸(shu)入(ru)至可(ke)(ke)(ke)以(yi)(yi)接(jie)(jie)收(shou)該信(xin)號(hao)(hao)的(de)(de)(de)(de)(de)(de)(de)模擬顯(xian)示(shi)儀器或處理(li)儀器例(li)如(ru)模擬信(xin)號(hao)(hao)示(shi)波顯(xian)示(shi)器或者模擬信(xin)號(hao)(hao)處理(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路板。