技術領域

本發明涉及(ji)(ji)(ji)一(yi)(yi)種傳感器(qi)及(ji)(ji)(ji)其制造(zao)方(fang)法(fa)，特別涉及(ji)(ji)(ji)一(yi)(yi)種用于在某一(yi)(yi)狹(xia)小接(jie)(jie)觸區(qu)域(yu)中(zhong)對一(yi)(yi)點接(jie)(jie)觸物體(ti)間的(de)壓力或集中(zhong)力進行檢測(ce)的(de)柔性單(dan)點力片式傳感器(qi)及(ji)(ji)(ji)其制造(zao)方(fang)法(fa)。

背景技術

壓力(li)(li)傳(chuan)感器及(ji)(ji)檢測(ce)(ce)技術在航(hang)(hang)空航(hang)(hang)天、軍事(shi)工(gong)(gong)(gong)業、汽車(che)、船舶制造(zao)、工(gong)(gong)(gong)業自動化、醫(yi)學研(yan)究、生物(wu)(wu)醫(yi)療(liao)等(deng)領域中(zhong)發揮著重(zhong)要的(de)(de)(de)(de)作(zuo)(zuo)用(yong)(yong)。然而在上(shang)述(shu)應用(yong)(yong)領域，許多場(chang)合需在某(mou)(mou)一(yi)狹小空間(jian)中(zhong)對(dui)某(mou)(mou)一(yi)點(dian)接(jie)(jie)觸(chu)(chu)物(wu)(wu)體間(jian)的(de)(de)(de)(de)壓力(li)(li)或集中(zhong)力(li)(li)進(jin)行檢測(ce)(ce)，例(li)如(ru)點(dian)接(jie)(jie)觸(chu)(chu)物(wu)(wu)體間(jian)在運動過程中(zhong)摩擦力(li)(li)相互(hu)(hu)作(zuo)(zuo)用(yong)(yong)過程的(de)(de)(de)(de)研(yan)究、例(li)如(ru)檢測(ce)(ce)空間(jian)凸輪與滾子從(cong)動件處(chu)于(yu)點(dian)接(jie)(jie)觸(chu)(chu)狀態下的(de)(de)(de)(de)相互(hu)(hu)作(zuo)(zuo)用(yong)(yong)力(li)(li)、檢測(ce)(ce)某(mou)(mou)一(yi)對(dui)牙齒嚙(nie)合時(shi)的(de)(de)(de)(de)相互(hu)(hu)作(zuo)(zuo)用(yong)(yong)力(li)(li)等(deng)。由于(yu)受到傳(chuan)感器重(zhong)量、體積以及(ji)(ji)工(gong)(gong)(gong)作(zuo)(zuo)空間(jian)(如(ru)狹縫)的(de)(de)(de)(de)限制，這(zhe)時(shi)傳(chuan)統壓力(li)(li)傳(chuan)感器便(bian)(bian)不(bu)能(neng)用(yong)(yong)于(yu)上(shang)述(shu)場(chang)合下的(de)(de)(de)(de)使(shi)用(yong)(yong)來檢測(ce)(ce)某(mou)(mou)一(yi)點(dian)接(jie)(jie)觸(chu)(chu)物(wu)(wu)體間(jian)的(de)(de)(de)(de)壓力(li)(li)或集中(zhong)力(li)(li)。即便(bian)(bian)勉強使(shi)用(yong)(yong)，也不(bu)能(neng)滿足操(cao)作(zuo)(zuo)便(bian)(bian)捷的(de)(de)(de)(de)要求，

發明內容

本發明(ming)針對傳(chuan)統壓力(li)傳(chuan)感器(qi)不(bu)能對某一(yi)(yi)點(dian)接觸物(wu)體間壓力(li)進(jin)行(xing)檢測、體積大、重量(liang)重、操作(zuo)(zuo)不(bu)方便的缺(que)點(dian)；提供了一(yi)(yi)種能夠檢測出某一(yi)(yi)點(dian)接觸物(wu)體間壓力(li)的柔性(xing)單點(dian)力(li)片式傳(chuan)感器(qi)，該傳(chuan)感器(qi)具有體積小、重量(liang)輕、制(zhi)作(zuo)(zuo)簡單、可(ke)低成本批量(liang)化生產的特點(dian)，并且可(ke)重復(fu)使用、操作(zuo)(zuo)簡便。

本發明的另一(yi)個目的是提供一(yi)種(zhong)該傳(chuan)感器的制造方法。

為(wei)達到上述目的，本發明是采取如(ru)下技(ji)術方案予(yu)以實現的：

一(yi)(yi)種柔性單點力(li)片(pian)(pian)式傳感器，包括壓(ya)(ya)敏(min)體(ti)、分(fen)別設(she)(she)置(zhi)在壓(ya)(ya)敏(min)體(ti)上下(xia)(xia)端面(mian)的(de)兩(liang)個電(dian)(dian)極(ji)(ji)(ji)(ji)連(lian)(lian)接(jie)(jie)片(pian)(pian)，其特征(zheng)在于(yu)，還包括有形狀大(da)小相(xiang)同的(de)上基板(ban)(ban)(ban)(ban)和下(xia)(xia)基板(ban)(ban)(ban)(ban)，上、下(xia)(xia)基板(ban)(ban)(ban)(ban)之(zhi)間(jian)由粘接(jie)(jie)層(ceng)封(feng)接(jie)(jie)；在上基板(ban)(ban)(ban)(ban)長度方(fang)向的(de)一(yi)(yi)側設(she)(she)置(zhi)有一(yi)(yi)凸(tu)(tu)起；在相(xiang)對該(gai)(gai)凸(tu)(tu)起的(de)下(xia)(xia)基板(ban)(ban)(ban)(ban)上設(she)(she)置(zhi)有一(yi)(yi)凹(ao)陷(xian)，該(gai)(gai)凹(ao)陷(xian)與(yu)所(suo)(suo)述凸(tu)(tu)起之(zhi)間(jian)形成一(yi)(yi)個密閉的(de)壓(ya)(ya)敏(min)體(ti)室，其中封(feng)裝有所(suo)(suo)述的(de)壓(ya)(ya)敏(min)體(ti)及電(dian)(dian)極(ji)(ji)(ji)(ji)連(lian)(lian)接(jie)(jie)片(pian)(pian)，所(suo)(suo)述壓(ya)(ya)敏(min)體(ti)室的(de)大(da)小剛好與(yu)壓(ya)(ya)敏(min)體(ti)的(de)大(da)小吻合(he)；所(suo)(suo)述下(xia)(xia)基板(ban)(ban)(ban)(ban)1沿其長度方(fang)向設(she)(she)置(zhi)有兩(liang)條相(xiang)互平行的(de)印刷電(dian)(dian)極(ji)(ji)(ji)(ji)6，每(mei)個印刷電(dian)(dian)極(ji)(ji)(ji)(ji)分(fen)別連(lian)(lian)接(jie)(jie)位于(yu)壓(ya)(ya)敏(min)體(ti)上或下(xia)(xia)端面(mian)的(de)電(dian)(dian)極(ji)(ji)(ji)(ji)連(lian)(lian)接(jie)(jie)片(pian)(pian)9和伸出下(xia)(xia)基板(ban)(ban)(ban)(ban)的(de)電(dian)(dian)極(ji)(ji)(ji)(ji)引出片(pian)(pian)3；所(suo)(suo)述下(xia)(xia)基板(ban)(ban)(ban)(ban)上的(de)兩(liang)條印刷電(dian)(dian)極(ji)(ji)(ji)(ji)6從連(lian)(lian)接(jie)(jie)電(dian)(dian)極(ji)(ji)(ji)(ji)連(lian)(lian)接(jie)(jie)片(pian)(pian)9到連(lian)(lian)接(jie)(jie)電(dian)(dian)極(ji)(ji)(ji)(ji)引出片(pian)(pian)3一(yi)(yi)段的(de)上表面(mian)設(she)(she)置(zhi)有電(dian)(dian)極(ji)(ji)(ji)(ji)保護膜。

一種上(shang)述柔(rou)性單點力片式傳感器的制造(zao)方(fang)法(fa)，其特征在于，包括如下步驟：

a.先制備形狀大小(xiao)相同的上(shang)基(ji)板和(he)下基(ji)板，在(zai)上(shang)基(ji)板長(chang)度方向的一(yi)側(ce)設置一(yi)凸(tu)起；在(zai)相對該凸(tu)起的下基(ji)板上(shang)設置一(yi)凹陷；

b.將下基(ji)板1固定在絲網印(yin)(yin)刷(shua)機(ji)的印(yin)(yin)刷(shua)臺上，用(yong)導(dao)電料漿沿下基(ji)板長(chang)度方向(xiang)從遠離(li)凹陷(xian)一(yi)側(ce)到凹陷(xian)的上表面(mian)印(yin)(yin)制兩條印(yin)(yin)刷(shua)電極，干燥后(hou)，在下基(ji)板遠離(li)凹陷(xian)的一(yi)側(ce)設(she)置兩個外露的電極引出片3。

c.在下基(ji)板凹陷中涂敷壓(ya)敏電(dian)阻油(you)墨(mo)，并放置一個壓(ya)敏體，該(gai)壓(ya)敏體上(shang)、下端面(mian)事先分別(bie)焊接好兩個電(dian)極連接片(pian)9，位于(yu)壓(ya)敏體上(shang)、下端面(mian)的(de)兩電(dian)極連接片(pian)9分別(bie)連接至位于(yu)下基(ji)板上(shang)的(de)兩條印刷(shua)電(dian)極6的(de)一端，兩條印刷(shua)電(dian)極6的(de)另一端連接外露的(de)兩個電(dian)極引出片(pian)3；同時，在上(shang)基(ji)板4的(de)凸起(qi)內表面(mian)上(shang)涂敷壓(ya)敏電(dian)阻油(you)墨(mo)。

d.在下基板的兩條印刷電(dian)極6上從連(lian)接電(dian)極連(lian)接片(pian)9到(dao)連(lian)接電(dian)極引出(chu)片(pian)3的一段上表(biao)面涂敷一層電(dian)極保(bao)護膜并干(gan)燥。

e.將(jiang)上(shang)、下基板用粘接(jie)層(ceng)復(fu)合(he)(he)，使(shi)所述(shu)凸起與凹陷之間(jian)形成一(yi)個的密閉壓(ya)(ya)(ya)敏(min)體(ti)室(shi)，將(jiang)壓(ya)(ya)(ya)敏(min)體(ti)及電(dian)極連接(jie)片封裝在其(qi)內，壓(ya)(ya)(ya)敏(min)體(ti)室(shi)的大小(xiao)剛(gang)好(hao)與壓(ya)(ya)(ya)敏(min)體(ti)的大小(xiao)吻合(he)(he)，同(tong)時(shi)兩條印刷電(dian)極相互平行。

以上(shang)方法(fa)中，所(suo)述(shu)的印刷電(dian)極(ji)(ji)用導電(dian)漿(jiang)料為銀導電(dian)漿(jiang)料；所(suo)述(shu)的電(dian)極(ji)(ji)保護(hu)膜材料采用羥乙基纖維素；所(suo)述(shu)的壓敏電(dian)阻油墨采用碳二硫化鉬油墨；所(suo)述(shu)的上(shang)、下基板采用聚氯乙烯材料制成(cheng)矩形(xing)基片；所(suo)述(shu)的粘接層采用環氧(yang)樹脂(zhi)。

本發明的(de)(de)柔(rou)性單點(dian)力(li)片(pian)(pian)式(shi)傳感器不(bu)需要外加保(bao)護(hu)(hu)裝置，不(bu)用將(jiang)壓敏電(dian)阻直(zhi)接(jie)置入被測(ce)對(dui)象(xiang)內(nei)部，只(zhi)需將(jiang)被測(ce)對(dui)象(xiang)的(de)(de)點(dian)接(jie)觸部位與壓敏電(dian)阻所對(dui)應的(de)(de)壓敏體室的(de)(de)聚(ju)氯乙(yi)烯PVC絕緣基片(pian)(pian)直(zhi)接(jie)接(jie)觸即可(ke)；同時(shi)壓敏電(dian)阻材(cai)料在工作過程中始終(zhong)受到了聚(ju)氯乙(yi)烯PVC片(pian)(pian)的(de)(de)絕緣保(bao)護(hu)(hu)。由于(yu)兩條銀導電(dian)電(dian)極(ji)(ji)均處于(yu)羥(qian)乙(yi)基纖維素HEC的(de)(de)絕緣保(bao)護(hu)(hu)下，可(ke)有(you)效防止兩電(dian)極(ji)(ji)間(jian)間(jian)距太小而(er)引起的(de)(de)電(dian)子遷移所造成(cheng)的(de)(de)電(dian)極(ji)(ji)間(jian)短(duan)路現象(xiang)。該(gai)柔(rou)性單點(dian)力(li)片(pian)(pian)式(shi)傳感器只(zhi)有(you)電(dian)極(ji)(ji)引出片(pian)(pian)部分區域外露，因(yin)此具有(you)抗強干(gan)擾的(de)(de)優點(dian)。

本(ben)發明采用(yong)(yong)基(ji)于絲網印刷工(gong)藝的(de)(de)制造方法，使制得的(de)(de)單(dan)點力傳感器具(ju)有重(zhong)量輕、體積小(片狀)、成本(ben)低、制作(zuo)簡單(dan)、可(ke)批量化(hua)生產的(de)(de)特點，并可(ke)重(zhong)復使用(yong)(yong)、操作(zuo)便捷。該傳感器可(ke)應(ying)(ying)用(yong)(yong)于工(gong)作(zuo)空(kong)間狹小的(de)(de)某(mou)一點接觸物體間的(de)(de)壓(ya)力或(huo)集中力的(de)(de)檢測(ce)以(yi)及類似特殊應(ying)(ying)用(yong)(yong)場(chang)合(he)。

附圖說明

圖(tu)1為本(ben)發(fa)明柔性單(dan)點力片(pian)式傳(chuan)感器結構示意圖(tu)。圖(tu)中：1、下基板(ban)；2、粘接層；3、電(dian)極(ji)引(yin)出片(pian)；4、上基板(ban)；5、電(dian)極(ji)保護膜(mo)；6、印(yin)刷電(dian)極(ji)；7、壓敏體。

圖2為圖1的(de)俯視(shi)其及(ji)印刷電極(ji)(ji)的(de)局部剖視(shi)圖。圖中：8、上基板凸(tu)起(qi)；9、電極(ji)(ji)連接片。

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

圖4為本發明柔(rou)性單點(dian)力(li)片(pian)式(shi)傳感器一個應用實例的測量電路原理圖。

具體(ti)實施方式

下面結合附圖(tu)及實施例對本發明(ming)(ming)作進一步的(de)詳細說(shuo)明(ming)(ming)。

如圖1-圖3所(suo)示，一(yi)(yi)種(zhong)柔性單點(dian)力片(pian)式(shi)傳感器，包括上(shang)(shang)(shang)(shang)基(ji)(ji)板(ban)(ban)(ban)4和下基(ji)(ji)板(ban)(ban)(ban)1、壓(ya)(ya)敏(min)(min)體7、設置(zhi)在(zai)(zai)壓(ya)(ya)敏(min)(min)體7垂直兩(liang)(liang)端(duan)面的(de)兩(liang)(liang)個(ge)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)連接(jie)(jie)(jie)(jie)片(pian)9，上(shang)(shang)(shang)(shang)、下基(ji)(ji)板(ban)(ban)(ban)之(zhi)間由環(huan)氧樹脂粘接(jie)(jie)(jie)(jie)層(ceng)2封接(jie)(jie)(jie)(jie)；上(shang)(shang)(shang)(shang)、下基(ji)(ji)板(ban)(ban)(ban)4、1可由聚氯乙(yi)烯(PVC)制成(cheng)相(xiang)同(tong)大小尺(chi)寸的(de)矩(ju)形(xing)(xing)基(ji)(ji)片(pian)；在(zai)(zai)靠近上(shang)(shang)(shang)(shang)基(ji)(ji)板(ban)(ban)(ban)4長度(du)方(fang)向(xiang)的(de)左側設置(zhi)有一(yi)(yi)凸(tu)起(qi)8；在(zai)(zai)相(xiang)對(dui)該(gai)凸(tu)起(qi)8的(de)下基(ji)(ji)板(ban)(ban)(ban)上(shang)(shang)(shang)(shang)設置(zhi)有一(yi)(yi)凹(ao)陷(xian)10，該(gai)凹(ao)陷(xian)與凸(tu)起(qi)之(zhi)間形(xing)(xing)成(cheng)一(yi)(yi)個(ge)的(de)密閉壓(ya)(ya)敏(min)(min)體室，其(qi)中封裝有壓(ya)(ya)敏(min)(min)體7及(ji)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)連接(jie)(jie)(jie)(jie)片(pian)9，壓(ya)(ya)敏(min)(min)體室的(de)大小剛好與壓(ya)(ya)敏(min)(min)體7的(de)大小吻合，壓(ya)(ya)敏(min)(min)體7為圓片(pian)或(huo)方(fang)塊形(xing)(xing)壓(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)阻；下基(ji)(ji)板(ban)(ban)(ban)1上(shang)(shang)(shang)(shang)設置(zhi)有兩(liang)(liang)條沿其(qi)長度(du)方(fang)向(xiang)相(xiang)互平行的(de)印刷(shua)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)6，印刷(shua)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)6為銀(yin)導電(dian)(dian)(dian)(dian)(dian)帶狀薄膜。每條印刷(shua)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)在(zai)(zai)凹(ao)陷(xian)右(you)邊沿處的(de)一(yi)(yi)端(duan)連接(jie)(jie)(jie)(jie)一(yi)(yi)個(ge)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)連接(jie)(jie)(jie)(jie)片(pian)9；遠離凹(ao)陷(xian)到下基(ji)(ji)板(ban)(ban)(ban)1右(you)側處的(de)另一(yi)(yi)端(duan)連接(jie)(jie)(jie)(jie)一(yi)(yi)個(ge)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)引出(chu)(chu)片(pian)3，該(gai)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)引出(chu)(chu)片(pian)3外露下基(ji)(ji)板(ban)(ban)(ban)右(you)側；印刷(shua)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)6從(cong)連接(jie)(jie)(jie)(jie)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)連接(jie)(jie)(jie)(jie)片(pian)9到連接(jie)(jie)(jie)(jie)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)引出(chu)(chu)片(pian)3的(de)一(yi)(yi)段(duan)上(shang)(shang)(shang)(shang)表面設置(zhi)有電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)保(bao)護膜5，該(gai)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)保(bao)護膜為羥乙(yi)基(ji)(ji)纖(xian)維素(HEC)膜層(ceng)。

以上柔(rou)性單(dan)點力片式傳感器(qi)制造方法，包(bao)括下述步驟：

a.先制(zhi)備形(xing)狀大小相(xiang)同的(de)(de)上(shang)基(ji)(ji)(ji)板和(he)下基(ji)(ji)(ji)板，在上(shang)基(ji)(ji)(ji)板長度(du)方向的(de)(de)一側設(she)(she)置一凸(tu)起；在相(xiang)對該凸(tu)起的(de)(de)下基(ji)(ji)(ji)板上(shang)設(she)(she)置一凹陷(xian)；

b.將下基(ji)板1固(gu)定(ding)在絲網(wang)印刷(shua)(shua)機的(de)(de)印刷(shua)(shua)臺上，用導電料漿沿(yan)下基(ji)板長度方向從遠離凹陷(xian)一側到凹陷(xian)的(de)(de)上表面印制(zhi)兩條印刷(shua)(shua)電極(ji)，干(gan)燥后，在下基(ji)板遠離凹陷(xian)的(de)(de)一側設置兩個外(wai)露的(de)(de)電極(ji)引出片3。

c.在下(xia)基板(ban)凹(ao)陷中(zhong)涂(tu)(tu)敷壓敏(min)(min)(min)電(dian)阻(zu)油(you)墨，并(bing)放置一(yi)個壓敏(min)(min)(min)體(ti)(ti)，該(gai)壓敏(min)(min)(min)體(ti)(ti)上(shang)(shang)、下(xia)端面事先(xian)分(fen)別(bie)焊(han)接(jie)好兩(liang)(liang)(liang)個電(dian)極(ji)連接(jie)片9，位于(yu)壓敏(min)(min)(min)體(ti)(ti)上(shang)(shang)、下(xia)端面的兩(liang)(liang)(liang)電(dian)極(ji)連接(jie)片9分(fen)別(bie)連接(jie)至(zhi)位于(yu)下(xia)基板(ban)上(shang)(shang)的兩(liang)(liang)(liang)條印(yin)刷電(dian)極(ji)6，兩(liang)(liang)(liang)條印(yin)刷電(dian)極(ji)6的另一(yi)端連接(jie)外露的兩(liang)(liang)(liang)個電(dian)極(ji)引出片3；同時，在上(shang)(shang)基板(ban)4的凸起內表(biao)面上(shang)(shang)涂(tu)(tu)敷壓敏(min)(min)(min)電(dian)阻(zu)油(you)墨。

d.在下基板的兩條(tiao)印(yin)刷電(dian)極6上從(cong)連(lian)(lian)接(jie)電(dian)極連(lian)(lian)接(jie)片(pian)9到連(lian)(lian)接(jie)電(dian)極引出片(pian)3的一(yi)(yi)段上表(biao)面涂敷(fu)一(yi)(yi)層電(dian)極保護膜并干(gan)燥。

e.將(jiang)上(shang)、下(xia)基板用粘(zhan)接(jie)層復(fu)合，使所(suo)述凸起與凹陷(xian)之間形成一個的(de)密閉(bi)壓(ya)敏(min)體室(shi)，將(jiang)壓(ya)敏(min)體及電極連接(jie)片(pian)封裝(zhuang)在(zai)其(qi)內，壓(ya)敏(min)體室(shi)的(de)大小剛好與壓(ya)敏(min)體的(de)大小吻合，同時兩條印刷電極相互平(ping)行。

當上(shang)述絲網印刷(shua)單點(dian)力片式傳感器與外(wai)接電(dian)(dian)路連接并通過能正常工作的測試(shi)后，該傳感器外(wai)露部(bu)分電(dian)(dian)極引出(chu)片3與外(wai)接導線連接部(bu)分用絕緣硅膠將其覆蓋以防銀電(dian)(dian)極長期處(chu)于在(zai)空氣中被氧化而削(xue)弱或(huo)喪失了其導電(dian)(dian)性(xing)能。

本發明柔性單點力(li)(li)片(pian)式傳感器的(de)(de)(de)檢測原理如下：當處于(yu)點接觸狀態(tai)時物體(ti)間的(de)(de)(de)一集(ji)(ji)中載荷(集(ji)(ji)中力(li)(li))作用(yong)于(yu)壓(ya)(ya)敏(min)(min)電(dian)(dian)阻(zu)(zu)(zu)7上時，壓(ya)(ya)敏(min)(min)電(dian)(dian)阻(zu)(zu)(zu)因(yin)受到了壓(ya)(ya)力(li)(li)作用(yong)便(bian)發生了一定的(de)(de)(de)壓(ya)(ya)縮變(bian)形，從(cong)而引(yin)起了壓(ya)(ya)敏(min)(min)電(dian)(dian)阻(zu)(zu)(zu)值的(de)(de)(de)變(bian)化，反映(ying)在電(dian)(dian)路上便(bian)是兩銀導(dao)電(dian)(dian)電(dian)(dian)極(ji)6之間電(dian)(dian)壓(ya)(ya)值的(de)(de)(de)改變(bian)；根據壓(ya)(ya)敏(min)(min)電(dian)(dian)阻(zu)(zu)(zu)上電(dian)(dian)壓(ya)(ya)值相對于(yu)最初電(dian)(dian)壓(ya)(ya)值的(de)(de)(de)變(bian)化量便(bian)可反映(ying)出點接觸處壓(ya)(ya)力(li)(li)或(huo)集(ji)(ji)中載荷的(de)(de)(de)大小。集(ji)(ji)中載荷與(yu)軸向長(chang)度(du)、電(dian)(dian)阻(zu)(zu)(zu)阻(zu)(zu)(zu)值與(yu)軸向長(chang)度(du)的(de)(de)(de)關系(xi)(xi)、電(dian)(dian)壓(ya)(ya)與(yu)電(dian)(dian)阻(zu)(zu)(zu)的(de)(de)(de)關系(xi)(xi)如下：

ΔL=FLES---(1)

其(qi)中：L——壓敏電阻的(de)原始厚度；

S——壓敏電阻的橫截(jie)面面積；

F——作(zuo)用于壓敏電(dian)阻上的集中載荷；

E——壓敏電阻的(de)彈(dan)性模量；

ΔL——壓(ya)敏電阻油墨厚度(du)的改變量。

R=ρLS---(2)

其(qi)中：L——壓敏(min)電阻油(you)墨的厚度；

S——壓敏(min)電(dian)阻油墨的(de)橫截面(mian)面(mian)積；

ρ——壓(ya)敏電阻油墨的電阻率；

R——壓(ya)敏電阻油墨的電阻值。

                U＝IR        (3)

其中：I——流經壓敏電阻(zu)的電流值；

R——壓(ya)敏(min)電(dian)阻油墨(mo)的(de)電(dian)阻值；

U——壓敏電(dian)阻油墨的電(dian)壓值；

如圖(tu)4所(suo)示(shi)，絲網(wang)印(yin)刷單(dan)點(dian)力片(pian)式傳(chuan)感器(qi)的(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)因(yin)(yin)為只受到軸向壓(ya)(ya)(ya)(ya)縮變(bian)(bian)(bian)形而引(yin)起(qi)(qi)了其(qi)(qi)阻(zu)(zu)(zu)值的(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)，因(yin)(yin)此在測量(liang)電(dian)(dian)(dian)(dian)路(lu)(lu)中壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)可(ke)(ke)以(yi)被當(dang)(dang)作電(dian)(dian)(dian)(dian)路(lu)(lu)中的(de)(de)(de)(de)可(ke)(ke)變(bian)(bian)(bian)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)對待；同時又由于壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)的(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)引(yin)起(qi)(qi)了加在壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)兩端電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值的(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)，因(yin)(yin)此壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)端電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)可(ke)(ke)以(yi)被當(dang)(dang)作檢測電(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)(de)輸(shu)(shu)入(ru)變(bian)(bian)(bian)量(liang)信(xin)(xin)(xin)號(hao)(hao)(hao)。由于單(dan)點(dian)力傳(chuan)感器(qi)的(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)因(yin)(yin)外(wai)力作用而引(yin)起(qi)(qi)了加在其(qi)(qi)兩端電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)，反(fan)(fan)相比例(li)放(fang)大(da)(da)電(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)(de)輸(shu)(shu)入(ru)端恰好(hao)是壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)端電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)端；因(yin)(yin)此壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)端電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)必(bi)然引(yin)起(qi)(qi)了反(fan)(fan)相比例(li)放(fang)大(da)(da)電(dian)(dian)(dian)(dian)路(lu)(lu)I輸(shu)(shu)出電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值的(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)，也就是說(shuo)單(dan)點(dian)力傳(chuan)感器(qi)受外(wai)力作用是可(ke)(ke)以(yi)引(yin)起(qi)(qi)測量(liang)電(dian)(dian)(dian)(dian)路(lu)(lu)中相應電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)的(de)(de)(de)(de)。當(dang)(dang)外(wai)力作用于單(dan)點(dian)力傳(chuan)感器(qi)后由于壓(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)值的(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)而產生了一定的(de)(de)(de)(de)微弱(ruo)電(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)(hao)(hao)，通(tong)過(guo)(guo)(guo)反(fan)(fan)相比例(li)放(fang)大(da)(da)器(qi)I將(jiang)該信(xin)(xin)(xin)號(hao)(hao)(hao)放(fang)大(da)(da)；然后再(zai)通(tong)過(guo)(guo)(guo)低通(tong)濾波器(qi)將(jiang)其(qi)(qi)他高頻干(gan)擾(rao)信(xin)(xin)(xin)號(hao)(hao)(hao)過(guo)(guo)(guo)濾或(huo)者去除(chu)；接(jie)著再(zai)通(tong)過(guo)(guo)(guo)反(fan)(fan)相比例(li)放(fang)大(da)(da)器(qi)II將(jiang)電(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)(hao)(hao)還原(yuan)到最初(chu)的(de)(de)(de)(de)相位(因(yin)(yin)為前后經(jing)過(guo)(guo)(guo)了兩次反(fan)(fan)相放(fang)大(da)(da)，因(yin)(yin)此經(jing)過(guo)(guo)(guo)處(chu)理(li)(li)后的(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)可(ke)(ke)以(yi)恢復到原(yuan)來(lai)的(de)(de)(de)(de)正電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值，同時將(jiang)微弱(ruo)電(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)(hao)(hao)值放(fang)大(da)(da)了)；最后再(zai)通(tong)過(guo)(guo)(guo)A/D轉換器(qi)限壓(ya)(ya)(ya)(ya)轉換將(jiang)外(wai)力引(yin)起(qi)(qi)的(de)(de)(de)(de)并經(jing)過(guo)(guo)(guo)處(chu)理(li)(li)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)(hao)(hao)轉換為計算機能識別的(de)(de)(de)(de)數字電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)信(xin)(xin)(xin)號(hao)(hao)(hao)，當(dang)(dang)然也可(ke)(ke)以(yi)直接(jie)將(jiang)反(fan)(fan)相比例(li)放(fang)大(da)(da)器(qi)II處(chu)理(li)(li)后的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)信(xin)(xin)(xin)號(hao)(hao)(hao)直接(jie)輸(shu)(shu)入(ru)至可(ke)(ke)以(yi)接(jie)收(shou)該信(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)(de)模(mo)擬顯示(shi)儀器(qi)或(huo)處(chu)理(li)(li)儀器(qi)例(li)如模(mo)擬信(xin)(xin)(xin)號(hao)(hao)(hao)示(shi)波顯示(shi)器(qi)或(huo)者模(mo)擬信(xin)(xin)(xin)號(hao)(hao)(hao)處(chu)理(li)(li)電(dian)(dian)(dian)(dian)路(lu)(lu)板。