技術領域

本發(fa)明涉及(ji)(ji)一(yi)(yi)種傳感器及(ji)(ji)其制造方(fang)(fang)法，特(te)別涉及(ji)(ji)一(yi)(yi)種用于在某一(yi)(yi)狹(xia)小接觸(chu)(chu)區域中對一(yi)(yi)點接觸(chu)(chu)物體(ti)間的壓(ya)力(li)或集中力(li)進行檢測的柔(rou)性單(dan)點力(li)片式傳感器及(ji)(ji)其制造方(fang)(fang)法。

背景技術

壓力(li)(li)(li)(li)傳(chuan)感器及檢測(ce)技(ji)術在(zai)航(hang)空(kong)航(hang)天、軍事(shi)工業(ye)(ye)、汽車、船(chuan)舶制造、工業(ye)(ye)自動化(hua)、醫學(xue)研(yan)究、生物(wu)醫療等領域(yu)中(zhong)發揮著重要的(de)(de)(de)(de)作(zuo)(zuo)用。然而在(zai)上述(shu)(shu)應用領域(yu)，許多場(chang)合(he)需在(zai)某一(yi)狹小空(kong)間中(zhong)對某一(yi)點(dian)(dian)接觸物(wu)體(ti)間的(de)(de)(de)(de)壓力(li)(li)(li)(li)或集中(zhong)力(li)(li)(li)(li)進行檢測(ce)，例如(ru)點(dian)(dian)接觸物(wu)體(ti)間在(zai)運(yun)動過程中(zhong)摩擦力(li)(li)(li)(li)相(xiang)互作(zuo)(zuo)用過程的(de)(de)(de)(de)研(yan)究、例如(ru)檢測(ce)空(kong)間凸輪(lun)與滾子從動件處于(yu)點(dian)(dian)接觸狀態下的(de)(de)(de)(de)相(xiang)互作(zuo)(zuo)用力(li)(li)(li)(li)、檢測(ce)某一(yi)對牙齒嚙合(he)時(shi)的(de)(de)(de)(de)相(xiang)互作(zuo)(zuo)用力(li)(li)(li)(li)等。由(you)于(yu)受(shou)到傳(chuan)感器重量、體(ti)積以(yi)及工作(zuo)(zuo)空(kong)間(如(ru)狹縫(feng))的(de)(de)(de)(de)限制，這時(shi)傳(chuan)統壓力(li)(li)(li)(li)傳(chuan)感器便不(bu)能(neng)用于(yu)上述(shu)(shu)場(chang)合(he)下的(de)(de)(de)(de)使用來檢測(ce)某一(yi)點(dian)(dian)接觸物(wu)體(ti)間的(de)(de)(de)(de)壓力(li)(li)(li)(li)或集中(zhong)力(li)(li)(li)(li)。即便勉強使用，也不(bu)能(neng)滿足操作(zuo)(zuo)便捷(jie)的(de)(de)(de)(de)要求，

發明內容

本發明針對傳(chuan)統壓(ya)力(li)(li)傳(chuan)感器不(bu)能(neng)對某一點(dian)接觸物體(ti)間(jian)壓(ya)力(li)(li)進(jin)行檢測(ce)、體(ti)積大、重(zhong)量(liang)重(zhong)、操(cao)作不(bu)方便的(de)缺點(dian)；提供(gong)了一種能(neng)夠檢測(ce)出某一點(dian)接觸物體(ti)間(jian)壓(ya)力(li)(li)的(de)柔(rou)性(xing)單點(dian)力(li)(li)片式傳(chuan)感器，該傳(chuan)感器具有體(ti)積小、重(zhong)量(liang)輕(qing)、制(zhi)作簡(jian)單、可低成本批量(liang)化生(sheng)產(chan)的(de)特點(dian)，并(bing)且可重(zhong)復使用、操(cao)作簡(jian)便。

本發(fa)明的(de)(de)另一(yi)(yi)個(ge)目的(de)(de)是提(ti)供一(yi)(yi)種該(gai)傳(chuan)感器的(de)(de)制造方法(fa)。

為達到上(shang)述目的，本發明是采取如下技術(shu)方案(an)予以實現(xian)的：

一種柔性(xing)單點力片(pian)(pian)式(shi)傳感器(qi)，包(bao)括(kuo)壓(ya)(ya)(ya)(ya)敏(min)體(ti)、分(fen)(fen)別設置在壓(ya)(ya)(ya)(ya)敏(min)體(ti)上(shang)下(xia)(xia)(xia)端面的(de)(de)(de)(de)兩(liang)個電(dian)(dian)(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)(jie)(jie)片(pian)(pian)，其特征在于(yu)，還包(bao)括(kuo)有(you)(you)形狀大(da)小相同的(de)(de)(de)(de)上(shang)基(ji)(ji)(ji)板(ban)和下(xia)(xia)(xia)基(ji)(ji)(ji)板(ban)，上(shang)、下(xia)(xia)(xia)基(ji)(ji)(ji)板(ban)之間由粘(zhan)接(jie)(jie)(jie)層封(feng)接(jie)(jie)(jie)；在上(shang)基(ji)(ji)(ji)板(ban)長度(du)(du)方向的(de)(de)(de)(de)一側設置有(you)(you)一凸起；在相對該凸起的(de)(de)(de)(de)下(xia)(xia)(xia)基(ji)(ji)(ji)板(ban)上(shang)設置有(you)(you)一凹(ao)陷，該凹(ao)陷與所(suo)述(shu)凸起之間形成一個密閉(bi)的(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)敏(min)體(ti)室，其中封(feng)裝有(you)(you)所(suo)述(shu)的(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)敏(min)體(ti)及電(dian)(dian)(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)(jie)(jie)片(pian)(pian)，所(suo)述(shu)壓(ya)(ya)(ya)(ya)敏(min)體(ti)室的(de)(de)(de)(de)大(da)小剛好與壓(ya)(ya)(ya)(ya)敏(min)體(ti)的(de)(de)(de)(de)大(da)小吻合；所(suo)述(shu)下(xia)(xia)(xia)基(ji)(ji)(ji)板(ban)1沿其長度(du)(du)方向設置有(you)(you)兩(liang)條相互平行的(de)(de)(de)(de)印(yin)(yin)刷(shua)電(dian)(dian)(dian)(dian)極(ji)6，每個印(yin)(yin)刷(shua)電(dian)(dian)(dian)(dian)極(ji)分(fen)(fen)別連(lian)(lian)(lian)接(jie)(jie)(jie)位于(yu)壓(ya)(ya)(ya)(ya)敏(min)體(ti)上(shang)或下(xia)(xia)(xia)端面的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)(jie)(jie)片(pian)(pian)9和伸(shen)出下(xia)(xia)(xia)基(ji)(ji)(ji)板(ban)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)極(ji)引出片(pian)(pian)3；所(suo)述(shu)下(xia)(xia)(xia)基(ji)(ji)(ji)板(ban)上(shang)的(de)(de)(de)(de)兩(liang)條印(yin)(yin)刷(shua)電(dian)(dian)(dian)(dian)極(ji)6從(cong)連(lian)(lian)(lian)接(jie)(jie)(jie)電(dian)(dian)(dian)(dian)極(ji)連(lian)(lian)(lian)接(jie)(jie)(jie)片(pian)(pian)9到連(lian)(lian)(lian)接(jie)(jie)(jie)電(dian)(dian)(dian)(dian)極(ji)引出片(pian)(pian)3一段的(de)(de)(de)(de)上(shang)表面設置有(you)(you)電(dian)(dian)(dian)(dian)極(ji)保護膜(mo)。

一種上述柔(rou)性單點力(li)片式傳感器的制造方法，其(qi)特征(zheng)在于，包括如下(xia)步驟：

a.先(xian)制備形狀大小相同的上(shang)基板和下(xia)基板，在上(shang)基板長度方向的一(yi)側設(she)(she)置一(yi)凸起；在相對該凸起的下(xia)基板上(shang)設(she)(she)置一(yi)凹陷；

b.將下基(ji)板(ban)1固定(ding)在(zai)絲網印刷機的(de)(de)印刷臺上(shang)，用導電(dian)料漿沿下基(ji)板(ban)長度方(fang)向從遠(yuan)(yuan)離凹(ao)陷一側到凹(ao)陷的(de)(de)上(shang)表(biao)面印制兩條(tiao)印刷電(dian)極(ji)，干燥后，在(zai)下基(ji)板(ban)遠(yuan)(yuan)離凹(ao)陷的(de)(de)一側設置兩個外(wai)露的(de)(de)電(dian)極(ji)引出(chu)片(pian)3。

c.在下基(ji)板(ban)(ban)(ban)凹陷中涂敷壓(ya)敏(min)(min)電(dian)阻(zu)油墨(mo)(mo)，并放置一(yi)個(ge)壓(ya)敏(min)(min)體，該壓(ya)敏(min)(min)體上(shang)、下端面事(shi)先分別(bie)焊接好兩個(ge)電(dian)極(ji)連接片9，位于(yu)壓(ya)敏(min)(min)體上(shang)、下端面的(de)兩電(dian)極(ji)連接片9分別(bie)連接至位于(yu)下基(ji)板(ban)(ban)(ban)上(shang)的(de)兩條(tiao)印刷電(dian)極(ji)6的(de)一(yi)端，兩條(tiao)印刷電(dian)極(ji)6的(de)另(ling)一(yi)端連接外(wai)露的(de)兩個(ge)電(dian)極(ji)引出片3；同時，在上(shang)基(ji)板(ban)(ban)(ban)4的(de)凸起內表面上(shang)涂敷壓(ya)敏(min)(min)電(dian)阻(zu)油墨(mo)(mo)。

d.在下基板(ban)的兩條印刷電(dian)(dian)(dian)極6上(shang)從連接(jie)電(dian)(dian)(dian)極連接(jie)片9到連接(jie)電(dian)(dian)(dian)極引(yin)出片3的一(yi)段上(shang)表(biao)面(mian)涂敷(fu)一(yi)層電(dian)(dian)(dian)極保護(hu)膜并干(gan)燥(zao)。

e.將(jiang)(jiang)上(shang)、下基(ji)板(ban)用粘接層復(fu)合(he)，使所述凸起(qi)與(yu)凹陷之間(jian)形成(cheng)一個的密閉壓(ya)敏體(ti)室，將(jiang)(jiang)壓(ya)敏體(ti)及電(dian)極(ji)連接片封裝在其內，壓(ya)敏體(ti)室的大(da)(da)小(xiao)剛(gang)好與(yu)壓(ya)敏體(ti)的大(da)(da)小(xiao)吻合(he)，同時兩條印(yin)刷(shua)電(dian)極(ji)相互平行。

以上方(fang)法中，所(suo)述的(de)印刷電極用(yong)導電漿料為(wei)銀導電漿料；所(suo)述的(de)電極保護膜材(cai)料采(cai)用(yong)羥乙(yi)(yi)基(ji)纖(xian)維(wei)素；所(suo)述的(de)壓(ya)敏(min)電阻油墨采(cai)用(yong)碳二硫化鉬油墨；所(suo)述的(de)上、下基(ji)板(ban)采(cai)用(yong)聚氯乙(yi)(yi)烯材(cai)料制(zhi)成(cheng)矩(ju)形基(ji)片；所(suo)述的(de)粘接(jie)層采(cai)用(yong)環氧(yang)樹(shu)脂。

本發明的(de)柔(rou)性單點(dian)(dian)力片(pian)(pian)式傳(chuan)感器(qi)不(bu)(bu)需要外加保護(hu)裝置，不(bu)(bu)用將壓(ya)敏電(dian)阻直(zhi)接(jie)(jie)置入被測對(dui)象內部(bu)，只(zhi)需將被測對(dui)象的(de)點(dian)(dian)接(jie)(jie)觸部(bu)位與壓(ya)敏電(dian)阻所(suo)對(dui)應的(de)壓(ya)敏體室的(de)聚氯乙烯PVC絕緣基(ji)(ji)片(pian)(pian)直(zhi)接(jie)(jie)接(jie)(jie)觸即可(ke)；同時(shi)壓(ya)敏電(dian)阻材料(liao)在工作過程中始(shi)終受到(dao)了聚氯乙烯PVC片(pian)(pian)的(de)絕緣保護(hu)。由于(yu)(yu)兩(liang)條銀導電(dian)電(dian)極(ji)均處于(yu)(yu)羥乙基(ji)(ji)纖維素HEC的(de)絕緣保護(hu)下，可(ke)有效防止兩(liang)電(dian)極(ji)間(jian)(jian)間(jian)(jian)距(ju)太小而引起的(de)電(dian)子(zi)遷移所(suo)造成的(de)電(dian)極(ji)間(jian)(jian)短(duan)路現象。該柔(rou)性單點(dian)(dian)力片(pian)(pian)式傳(chuan)感器(qi)只(zhi)有電(dian)極(ji)引出片(pian)(pian)部(bu)分區域外露，因(yin)此具有抗強干擾的(de)優點(dian)(dian)。

本發明采(cai)用基于(yu)絲網(wang)印刷工(gong)藝(yi)的制造方法，使(shi)制得的單點力傳感(gan)器具(ju)有重量(liang)輕、體積(ji)小(片狀(zhuang))、成本低、制作簡單、可批量(liang)化生產的特點，并可重復(fu)使(shi)用、操作便捷。該(gai)傳感(gan)器可應(ying)用于(yu)工(gong)作空間狹小的某一點接(jie)觸物體間的壓力或集中力的檢測以(yi)及類似特殊應(ying)用場合(he)。

附圖說明

圖1為(wei)本(ben)發(fa)明柔性單點力片(pian)式傳感器結構(gou)示意(yi)圖。圖中：1、下基(ji)板；2、粘接(jie)層；3、電極(ji)引出片(pian)；4、上(shang)基(ji)板；5、電極(ji)保(bao)護(hu)膜；6、印刷電極(ji)；7、壓敏體。

圖2為圖1的俯視其(qi)及印刷電(dian)極的局部剖視圖。圖中：8、上基板凸起；9、電(dian)極連接片。

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

圖4為本發明(ming)柔(rou)性單點力片式傳感器一個應用(yong)實(shi)例的測量電路原理圖。

具體實施方式

下面結合附圖及實施例(li)對本(ben)發明作(zuo)進(jin)一步(bu)的詳(xiang)細說(shuo)明。

如圖1-圖3所示(shi)，一(yi)(yi)(yi)種柔(rou)性單點(dian)力片(pian)(pian)(pian)式傳感器，包括上基(ji)(ji)(ji)(ji)板(ban)4和下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)1、壓(ya)敏(min)體(ti)7、設(she)(she)置(zhi)(zhi)在壓(ya)敏(min)體(ti)7垂直兩端面的兩個電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)連(lian)(lian)接(jie)(jie)片(pian)(pian)(pian)9，上、下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)之(zhi)間(jian)由環(huan)氧樹脂粘接(jie)(jie)層(ceng)2封接(jie)(jie)；上、下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)4、1可由聚氯乙烯(PVC)制(zhi)成(cheng)相同大小(xiao)(xiao)尺寸的矩形(xing)基(ji)(ji)(ji)(ji)片(pian)(pian)(pian)；在靠近上基(ji)(ji)(ji)(ji)板(ban)4長(chang)度(du)方向(xiang)的左(zuo)側設(she)(she)置(zhi)(zhi)有(you)(you)一(yi)(yi)(yi)凸(tu)(tu)起8；在相對(dui)該凸(tu)(tu)起8的下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)上設(she)(she)置(zhi)(zhi)有(you)(you)一(yi)(yi)(yi)凹陷(xian)10，該凹陷(xian)與凸(tu)(tu)起之(zhi)間(jian)形(xing)成(cheng)一(yi)(yi)(yi)個的密閉壓(ya)敏(min)體(ti)室，其中封裝(zhuang)有(you)(you)壓(ya)敏(min)體(ti)7及電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)連(lian)(lian)接(jie)(jie)片(pian)(pian)(pian)9，壓(ya)敏(min)體(ti)室的大小(xiao)(xiao)剛好與壓(ya)敏(min)體(ti)7的大小(xiao)(xiao)吻合，壓(ya)敏(min)體(ti)7為(wei)圓片(pian)(pian)(pian)或方塊(kuai)形(xing)壓(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻；下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)1上設(she)(she)置(zhi)(zhi)有(you)(you)兩條沿其長(chang)度(du)方向(xiang)相互平行的印(yin)刷電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)6，印(yin)刷電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)6為(wei)銀導電(dian)(dian)(dian)(dian)(dian)帶狀薄(bo)膜(mo)(mo)。每條印(yin)刷電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)在凹陷(xian)右(you)(you)邊沿處的一(yi)(yi)(yi)端連(lian)(lian)接(jie)(jie)一(yi)(yi)(yi)個電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)連(lian)(lian)接(jie)(jie)片(pian)(pian)(pian)9；遠離凹陷(xian)到下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)1右(you)(you)側處的另一(yi)(yi)(yi)端連(lian)(lian)接(jie)(jie)一(yi)(yi)(yi)個電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)引出片(pian)(pian)(pian)3，該電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)引出片(pian)(pian)(pian)3外(wai)露(lu)下(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)右(you)(you)側；印(yin)刷電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)6從連(lian)(lian)接(jie)(jie)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)連(lian)(lian)接(jie)(jie)片(pian)(pian)(pian)9到連(lian)(lian)接(jie)(jie)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)引出片(pian)(pian)(pian)3的一(yi)(yi)(yi)段上表面設(she)(she)置(zhi)(zhi)有(you)(you)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)保護膜(mo)(mo)5，該電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)保護膜(mo)(mo)為(wei)羥乙基(ji)(ji)(ji)(ji)纖維素(su)(HEC)膜(mo)(mo)層(ceng)。

以上柔性單點力(li)片(pian)式傳(chuan)感器制造方法，包括(kuo)下(xia)述步驟(zou)：

a.先(xian)制備(bei)形狀大小(xiao)相同的(de)上基板和下基板，在上基板長度方(fang)向(xiang)的(de)一(yi)側設置(zhi)一(yi)凸起；在相對該凸起的(de)下基板上設置(zhi)一(yi)凹陷(xian)；

b.將下基板1固定(ding)在絲網(wang)印刷機(ji)的(de)印刷臺(tai)上，用(yong)導電(dian)(dian)料漿沿下基板長度方(fang)向(xiang)從(cong)遠(yuan)離凹(ao)陷(xian)一側到(dao)凹(ao)陷(xian)的(de)上表面(mian)印制(zhi)兩條(tiao)印刷電(dian)(dian)極(ji)，干燥后，在下基板遠(yuan)離凹(ao)陷(xian)的(de)一側設置兩個(ge)外露的(de)電(dian)(dian)極(ji)引出片3。

c.在下(xia)(xia)基板(ban)凹陷中(zhong)涂(tu)敷(fu)壓(ya)(ya)敏(min)(min)電(dian)阻油墨，并(bing)放(fang)置(zhi)一個(ge)壓(ya)(ya)敏(min)(min)體，該壓(ya)(ya)敏(min)(min)體上(shang)、下(xia)(xia)端面(mian)事(shi)先分別焊接(jie)好(hao)兩(liang)(liang)個(ge)電(dian)極連接(jie)片(pian)(pian)9，位(wei)于壓(ya)(ya)敏(min)(min)體上(shang)、下(xia)(xia)端面(mian)的(de)兩(liang)(liang)電(dian)極連接(jie)片(pian)(pian)9分別連接(jie)至位(wei)于下(xia)(xia)基板(ban)上(shang)的(de)兩(liang)(liang)條(tiao)(tiao)印刷電(dian)極6，兩(liang)(liang)條(tiao)(tiao)印刷電(dian)極6的(de)另一端連接(jie)外露(lu)的(de)兩(liang)(liang)個(ge)電(dian)極引(yin)出片(pian)(pian)3；同時(shi)，在上(shang)基板(ban)4的(de)凸(tu)起(qi)內表面(mian)上(shang)涂(tu)敷(fu)壓(ya)(ya)敏(min)(min)電(dian)阻油墨。

d.在(zai)下基板的兩條印刷電(dian)極(ji)6上從連(lian)接電(dian)極(ji)連(lian)接片9到連(lian)接電(dian)極(ji)引出片3的一(yi)段上表面涂敷一(yi)層(ceng)電(dian)極(ji)保護膜并干燥。

e.將上、下基板用粘接(jie)層復合(he)，使所述(shu)凸起與(yu)凹陷之(zhi)間形成一個的(de)(de)密(mi)閉壓敏體室，將壓敏體及電極(ji)連(lian)接(jie)片封(feng)裝在(zai)其內(nei)，壓敏體室的(de)(de)大(da)小(xiao)剛好與(yu)壓敏體的(de)(de)大(da)小(xiao)吻合(he)，同(tong)時兩條印刷電極(ji)相互平行。

當上述(shu)絲(si)網印刷單點(dian)力片式(shi)傳感器與(yu)外(wai)接(jie)電路(lu)連接(jie)并通(tong)過能(neng)正(zheng)常工作的測試(shi)后，該(gai)傳感器外(wai)露部分電極引出片3與(yu)外(wai)接(jie)導線(xian)連接(jie)部分用絕緣(yuan)硅(gui)膠將其覆蓋以防銀電極長(chang)期處(chu)于(yu)在空氣中被(bei)氧化而削弱(ruo)或喪失了其導電性能(neng)。

本發明柔性單點力片式傳感(gan)器(qi)的(de)(de)檢測(ce)原理如下：當處(chu)于點接(jie)觸(chu)狀(zhuang)態(tai)時物體間的(de)(de)一集中(zhong)(zhong)載(zai)荷(集中(zhong)(zhong)力)作(zuo)用(yong)于壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)阻(zu)7上(shang)(shang)時，壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)阻(zu)因受到了壓(ya)(ya)(ya)(ya)力作(zuo)用(yong)便(bian)發生了一定的(de)(de)壓(ya)(ya)(ya)(ya)縮變形，從而引(yin)起了壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)阻(zu)值(zhi)(zhi)的(de)(de)變化，反映(ying)在電(dian)(dian)路上(shang)(shang)便(bian)是兩(liang)銀導電(dian)(dian)電(dian)(dian)極6之間電(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)(zhi)的(de)(de)改變；根據壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)阻(zu)上(shang)(shang)電(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)(zhi)相對于最初電(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)(zhi)的(de)(de)變化量便(bian)可反映(ying)出點接(jie)觸(chu)處(chu)壓(ya)(ya)(ya)(ya)力或集中(zhong)(zhong)載(zai)荷的(de)(de)大小。集中(zhong)(zhong)載(zai)荷與(yu)軸向(xiang)長度、電(dian)(dian)阻(zu)阻(zu)值(zhi)(zhi)與(yu)軸向(xiang)長度的(de)(de)關(guan)系(xi)、電(dian)(dian)壓(ya)(ya)(ya)(ya)與(yu)電(dian)(dian)阻(zu)的(de)(de)關(guan)系(xi)如下：

ΔL=FLES---(1)

其中：L——壓敏電阻的原始厚度；

S——壓(ya)敏(min)電(dian)阻的橫截面(mian)面(mian)積；

F——作用于(yu)壓敏電阻上的集中(zhong)載荷；

E——壓敏(min)電阻(zu)的彈性模量(liang)；

ΔL——壓敏電阻油墨厚(hou)度的改變量。

R=ρLS---(2)

其中：L——壓敏電阻油墨的(de)厚(hou)度(du)；

S——壓敏電(dian)阻油墨的橫截(jie)面(mian)面(mian)積；

ρ——壓敏電阻油(you)墨的電阻率；

R——壓(ya)敏電阻(zu)(zu)油墨的電阻(zu)(zu)值。

                U＝IR        (3)

其中：I——流經壓敏(min)電(dian)阻(zu)的(de)電(dian)流值；

R——壓敏(min)電(dian)(dian)阻油墨的電(dian)(dian)阻值；

U——壓敏(min)電(dian)阻油墨的(de)電(dian)壓值；

如(ru)圖(tu)4所(suo)示(shi)，絲(si)網印刷單(dan)點力(li)(li)(li)片式傳(chuan)(chuan)感(gan)器(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)壓(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)因(yin)為(wei)只(zhi)受(shou)到(dao)(dao)軸(zhou)向壓(ya)(ya)(ya)縮變(bian)形(xing)而(er)引(yin)(yin)(yin)起(qi)了其阻(zu)值(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)，因(yin)此(ci)(ci)在(zai)測(ce)(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)路(lu)中壓(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)可(ke)(ke)(ke)以(yi)(yi)(yi)被(bei)當(dang)作(zuo)電(dian)(dian)(dian)(dian)(dian)路(lu)中的(de)(de)(de)(de)(de)(de)(de)(de)可(ke)(ke)(ke)變(bian)電(dian)(dian)(dian)(dian)(dian)阻(zu)對(dui)待；同時又由(you)(you)于壓(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)引(yin)(yin)(yin)起(qi)了加在(zai)壓(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)兩端電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)，因(yin)此(ci)(ci)壓(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)端電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)可(ke)(ke)(ke)以(yi)(yi)(yi)被(bei)當(dang)作(zuo)檢測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)(de)(de)(de)(de)(de)輸入變(bian)量(liang)信(xin)(xin)號(hao)(hao)。由(you)(you)于單(dan)點力(li)(li)(li)傳(chuan)(chuan)感(gan)器(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)壓(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)因(yin)外(wai)(wai)力(li)(li)(li)作(zuo)用(yong)而(er)引(yin)(yin)(yin)起(qi)了加在(zai)其兩端電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)，反(fan)(fan)相(xiang)(xiang)(xiang)(xiang)比例(li)放(fang)(fang)大(da)(da)(da)(da)電(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)(de)(de)(de)(de)(de)輸入端恰好(hao)是壓(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)端電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)端；因(yin)此(ci)(ci)壓(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)端電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)必然引(yin)(yin)(yin)起(qi)了反(fan)(fan)相(xiang)(xiang)(xiang)(xiang)比例(li)放(fang)(fang)大(da)(da)(da)(da)電(dian)(dian)(dian)(dian)(dian)路(lu)I輸出電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)，也(ye)就是說(shuo)單(dan)點力(li)(li)(li)傳(chuan)(chuan)感(gan)器(qi)(qi)受(shou)外(wai)(wai)力(li)(li)(li)作(zuo)用(yong)是可(ke)(ke)(ke)以(yi)(yi)(yi)引(yin)(yin)(yin)起(qi)測(ce)(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)路(lu)中相(xiang)(xiang)(xiang)(xiang)應電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)的(de)(de)(de)(de)(de)(de)(de)(de)。當(dang)外(wai)(wai)力(li)(li)(li)作(zuo)用(yong)于單(dan)點力(li)(li)(li)傳(chuan)(chuan)感(gan)器(qi)(qi)后(hou)(hou)由(you)(you)于壓(ya)(ya)(ya)敏(min)電(dian)(dian)(dian)(dian)(dian)阻(zu)值(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)(gai)變(bian)而(er)產生了一定的(de)(de)(de)(de)(de)(de)(de)(de)微弱(ruo)電(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)，通(tong)(tong)過(guo)(guo)(guo)反(fan)(fan)相(xiang)(xiang)(xiang)(xiang)比例(li)放(fang)(fang)大(da)(da)(da)(da)器(qi)(qi)I將(jiang)(jiang)(jiang)該信(xin)(xin)號(hao)(hao)放(fang)(fang)大(da)(da)(da)(da)；然后(hou)(hou)再通(tong)(tong)過(guo)(guo)(guo)低通(tong)(tong)濾波(bo)器(qi)(qi)將(jiang)(jiang)(jiang)其他高頻干擾信(xin)(xin)號(hao)(hao)過(guo)(guo)(guo)濾或(huo)者去除；接著(zhu)再通(tong)(tong)過(guo)(guo)(guo)反(fan)(fan)相(xiang)(xiang)(xiang)(xiang)比例(li)放(fang)(fang)大(da)(da)(da)(da)器(qi)(qi)II將(jiang)(jiang)(jiang)電(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)還原到(dao)(dao)最(zui)初的(de)(de)(de)(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)位(因(yin)為(wei)前后(hou)(hou)經(jing)過(guo)(guo)(guo)了兩次反(fan)(fan)相(xiang)(xiang)(xiang)(xiang)放(fang)(fang)大(da)(da)(da)(da)，因(yin)此(ci)(ci)經(jing)過(guo)(guo)(guo)處理(li)后(hou)(hou)的(de)(de)(de)(de)(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)可(ke)(ke)(ke)以(yi)(yi)(yi)恢復(fu)到(dao)(dao)原來(lai)的(de)(de)(de)(de)(de)(de)(de)(de)正電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)(zhi)，同時將(jiang)(jiang)(jiang)微弱(ruo)電(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)值(zhi)(zhi)放(fang)(fang)大(da)(da)(da)(da)了)；最(zui)后(hou)(hou)再通(tong)(tong)過(guo)(guo)(guo)A/D轉換器(qi)(qi)限(xian)壓(ya)(ya)(ya)轉換將(jiang)(jiang)(jiang)外(wai)(wai)力(li)(li)(li)引(yin)(yin)(yin)起(qi)的(de)(de)(de)(de)(de)(de)(de)(de)并經(jing)過(guo)(guo)(guo)處理(li)的(de)(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)轉換為(wei)計算機能識別的(de)(de)(de)(de)(de)(de)(de)(de)數字電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)信(xin)(xin)號(hao)(hao)，當(dang)然也(ye)可(ke)(ke)(ke)以(yi)(yi)(yi)直接將(jiang)(jiang)(jiang)反(fan)(fan)相(xiang)(xiang)(xiang)(xiang)比例(li)放(fang)(fang)大(da)(da)(da)(da)器(qi)(qi)II處理(li)后(hou)(hou)的(de)(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)信(xin)(xin)號(hao)(hao)直接輸入至可(ke)(ke)(ke)以(yi)(yi)(yi)接收該信(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)(de)(de)(de)(de)模(mo)擬(ni)顯(xian)示(shi)儀器(qi)(qi)或(huo)處理(li)儀器(qi)(qi)例(li)如(ru)模(mo)擬(ni)信(xin)(xin)號(hao)(hao)示(shi)波(bo)顯(xian)示(shi)器(qi)(qi)或(huo)者模(mo)擬(ni)信(xin)(xin)號(hao)(hao)處理(li)電(dian)(dian)(dian)(dian)(dian)路(lu)板(ban)。