技術領域

本發(fa)明涉(she)及(ji)一(yi)(yi)種(zhong)傳感器及(ji)其制造方法，特(te)別涉(she)及(ji)一(yi)(yi)種(zhong)用于在某一(yi)(yi)狹(xia)小接(jie)觸(chu)區域中對一(yi)(yi)點(dian)接(jie)觸(chu)物體(ti)間的壓力或集中力進行檢測的柔性單點(dian)力片(pian)式(shi)傳感器及(ji)其制造方法。

背景技術

壓力(li)傳感(gan)(gan)器及檢(jian)測(ce)(ce)(ce)技(ji)術在(zai)(zai)航(hang)空航(hang)天、軍事(shi)工業(ye)、汽車、船(chuan)舶制(zhi)造、工業(ye)自動化、醫學研究、生(sheng)物(wu)醫療等領(ling)域中(zhong)發(fa)揮著(zhu)重要(yao)的(de)作(zuo)用(yong)(yong)(yong)。然而在(zai)(zai)上述應(ying)用(yong)(yong)(yong)領(ling)域，許(xu)多場合需在(zai)(zai)某一(yi)狹(xia)小(xiao)空間中(zhong)對某一(yi)點接觸物(wu)體間的(de)壓力(li)或集中(zhong)力(li)進行檢(jian)測(ce)(ce)(ce)，例如(ru)點接觸物(wu)體間在(zai)(zai)運動過程(cheng)中(zhong)摩擦(ca)力(li)相互(hu)作(zuo)用(yong)(yong)(yong)過程(cheng)的(de)研究、例如(ru)檢(jian)測(ce)(ce)(ce)空間凸輪(lun)與滾子從動件處于點接觸狀(zhuang)態(tai)下的(de)相互(hu)作(zuo)用(yong)(yong)(yong)力(li)、檢(jian)測(ce)(ce)(ce)某一(yi)對牙齒嚙合時的(de)相互(hu)作(zuo)用(yong)(yong)(yong)力(li)等。由于受到(dao)傳感(gan)(gan)器重量、體積以及工作(zuo)空間(如(ru)狹(xia)縫)的(de)限制(zhi)，這時傳統壓力(li)傳感(gan)(gan)器便不能(neng)用(yong)(yong)(yong)于上述場合下的(de)使(shi)(shi)用(yong)(yong)(yong)來檢(jian)測(ce)(ce)(ce)某一(yi)點接觸物(wu)體間的(de)壓力(li)或集中(zhong)力(li)。即(ji)便勉(mian)強(qiang)使(shi)(shi)用(yong)(yong)(yong)，也不能(neng)滿(man)足操作(zuo)便捷的(de)要(yao)求，

發明內容

本(ben)發明(ming)針對(dui)傳統壓力(li)傳感(gan)(gan)器不能(neng)對(dui)某一(yi)點接觸物(wu)體(ti)間壓力(li)進行檢測、體(ti)積大、重量重、操作(zuo)不方便的(de)缺點；提供了一(yi)種(zhong)能(neng)夠檢測出某一(yi)點接觸物(wu)體(ti)間壓力(li)的(de)柔性單(dan)點力(li)片式傳感(gan)(gan)器，該傳感(gan)(gan)器具有體(ti)積小、重量輕、制作(zuo)簡單(dan)、可低成本(ben)批量化生(sheng)產的(de)特點，并且可重復(fu)使用、操作(zuo)簡便。

本發明(ming)的另一個目(mu)的是提供一種該(gai)傳感器(qi)的制(zhi)造方法。

為達到上述目的，本發(fa)明是采取如下技術方(fang)案(an)予以實現的：

一(yi)種(zhong)柔性(xing)單點力片式傳感器(qi)，包(bao)括(kuo)壓(ya)敏(min)(min)體(ti)(ti)、分別(bie)(bie)設置(zhi)(zhi)(zhi)在(zai)壓(ya)敏(min)(min)體(ti)(ti)上(shang)(shang)(shang)(shang)下(xia)端面(mian)的(de)(de)兩(liang)(liang)個(ge)電(dian)(dian)極(ji)連(lian)(lian)(lian)接片，其特征(zheng)在(zai)于(yu)，還(huan)包(bao)括(kuo)有形狀大小相同(tong)的(de)(de)上(shang)(shang)(shang)(shang)基(ji)(ji)板和下(xia)基(ji)(ji)板，上(shang)(shang)(shang)(shang)、下(xia)基(ji)(ji)板之間(jian)由(you)粘接層封接；在(zai)上(shang)(shang)(shang)(shang)基(ji)(ji)板長度(du)方向(xiang)的(de)(de)一(yi)側設置(zhi)(zhi)(zhi)有一(yi)凸起；在(zai)相對該凸起的(de)(de)下(xia)基(ji)(ji)板上(shang)(shang)(shang)(shang)設置(zhi)(zhi)(zhi)有一(yi)凹陷，該凹陷與所述(shu)(shu)凸起之間(jian)形成一(yi)個(ge)密閉的(de)(de)壓(ya)敏(min)(min)體(ti)(ti)室(shi)，其中封裝(zhuang)有所述(shu)(shu)的(de)(de)壓(ya)敏(min)(min)體(ti)(ti)及電(dian)(dian)極(ji)連(lian)(lian)(lian)接片，所述(shu)(shu)壓(ya)敏(min)(min)體(ti)(ti)室(shi)的(de)(de)大小剛好與壓(ya)敏(min)(min)體(ti)(ti)的(de)(de)大小吻(wen)合(he)；所述(shu)(shu)下(xia)基(ji)(ji)板1沿其長度(du)方向(xiang)設置(zhi)(zhi)(zhi)有兩(liang)(liang)條相互平行的(de)(de)印刷電(dian)(dian)極(ji)6，每個(ge)印刷電(dian)(dian)極(ji)分別(bie)(bie)連(lian)(lian)(lian)接位于(yu)壓(ya)敏(min)(min)體(ti)(ti)上(shang)(shang)(shang)(shang)或下(xia)端面(mian)的(de)(de)電(dian)(dian)極(ji)連(lian)(lian)(lian)接片9和伸(shen)出下(xia)基(ji)(ji)板的(de)(de)電(dian)(dian)極(ji)引(yin)出片3；所述(shu)(shu)下(xia)基(ji)(ji)板上(shang)(shang)(shang)(shang)的(de)(de)兩(liang)(liang)條印刷電(dian)(dian)極(ji)6從連(lian)(lian)(lian)接電(dian)(dian)極(ji)連(lian)(lian)(lian)接片9到連(lian)(lian)(lian)接電(dian)(dian)極(ji)引(yin)出片3一(yi)段(duan)的(de)(de)上(shang)(shang)(shang)(shang)表面(mian)設置(zhi)(zhi)(zhi)有電(dian)(dian)極(ji)保護膜。

一種(zhong)上述柔(rou)性單點力片(pian)式(shi)傳感器的制造方法，其特(te)征(zheng)在于，包括如下步驟(zou)：

a.先制備(bei)形(xing)狀大小相同的上(shang)基板和下基板，在(zai)上(shang)基板長度方向的一側(ce)設置(zhi)一凸起；在(zai)相對該凸起的下基板上(shang)設置(zhi)一凹陷；

b.將下基(ji)板(ban)1固定在絲網印(yin)刷機的印(yin)刷臺上(shang)，用導電(dian)料漿(jiang)沿下基(ji)板(ban)長度方(fang)向從遠離凹陷(xian)一側到凹陷(xian)的上(shang)表面(mian)印(yin)制(zhi)兩條印(yin)刷電(dian)極，干燥后(hou)，在下基(ji)板(ban)遠離凹陷(xian)的一側設置兩個外(wai)露的電(dian)極引出片3。

c.在下(xia)基板凹(ao)陷中涂敷壓(ya)(ya)敏(min)(min)(min)電(dian)(dian)阻油(you)墨(mo)，并放置一個壓(ya)(ya)敏(min)(min)(min)體(ti)，該壓(ya)(ya)敏(min)(min)(min)體(ti)上(shang)、下(xia)端(duan)面事先分別焊(han)接好(hao)兩(liang)個電(dian)(dian)極連(lian)接片(pian)9，位于壓(ya)(ya)敏(min)(min)(min)體(ti)上(shang)、下(xia)端(duan)面的(de)(de)(de)(de)兩(liang)電(dian)(dian)極連(lian)接片(pian)9分別連(lian)接至位于下(xia)基板上(shang)的(de)(de)(de)(de)兩(liang)條(tiao)(tiao)印(yin)刷電(dian)(dian)極6的(de)(de)(de)(de)一端(duan)，兩(liang)條(tiao)(tiao)印(yin)刷電(dian)(dian)極6的(de)(de)(de)(de)另一端(duan)連(lian)接外露的(de)(de)(de)(de)兩(liang)個電(dian)(dian)極引出(chu)片(pian)3；同時，在上(shang)基板4的(de)(de)(de)(de)凸起內表面上(shang)涂敷壓(ya)(ya)敏(min)(min)(min)電(dian)(dian)阻油(you)墨(mo)。

d.在下基板的兩(liang)條(tiao)印刷電(dian)(dian)極(ji)6上從連接電(dian)(dian)極(ji)連接片9到連接電(dian)(dian)極(ji)引出片3的一段上表(biao)面涂敷一層電(dian)(dian)極(ji)保(bao)護膜(mo)并干(gan)燥。

e.將(jiang)上、下(xia)基(ji)板用粘接層復合(he)，使所述凸起與凹陷之間形(xing)成(cheng)一個(ge)的密閉壓敏(min)體(ti)(ti)室，將(jiang)壓敏(min)體(ti)(ti)及電(dian)極連(lian)接片封(feng)裝在其內，壓敏(min)體(ti)(ti)室的大小剛好與壓敏(min)體(ti)(ti)的大小吻合(he)，同時兩條印刷電(dian)極相互(hu)平行(xing)。

以上方法中，所(suo)述的(de)印刷(shua)電(dian)(dian)極(ji)用導電(dian)(dian)漿料(liao)為(wei)銀導電(dian)(dian)漿料(liao)；所(suo)述的(de)電(dian)(dian)極(ji)保護膜材(cai)料(liao)采(cai)(cai)用羥(qian)乙(yi)基纖(xian)維(wei)素；所(suo)述的(de)壓敏電(dian)(dian)阻(zu)油墨采(cai)(cai)用碳二硫化鉬油墨；所(suo)述的(de)上、下基板采(cai)(cai)用聚氯(lv)乙(yi)烯材(cai)料(liao)制成矩(ju)形(xing)基片；所(suo)述的(de)粘接層采(cai)(cai)用環氧樹(shu)脂(zhi)。

本發明的(de)(de)(de)柔性單點(dian)(dian)力片(pian)(pian)(pian)式傳(chuan)感器不需要外加保(bao)護裝(zhuang)置，不用(yong)將壓(ya)(ya)敏(min)(min)電阻直接(jie)置入(ru)被(bei)測(ce)對象內部(bu)，只(zhi)需將被(bei)測(ce)對象的(de)(de)(de)點(dian)(dian)接(jie)觸(chu)部(bu)位與(yu)壓(ya)(ya)敏(min)(min)電阻所對應的(de)(de)(de)壓(ya)(ya)敏(min)(min)體室的(de)(de)(de)聚氯乙烯PVC絕緣基片(pian)(pian)(pian)直接(jie)接(jie)觸(chu)即可(ke)；同時壓(ya)(ya)敏(min)(min)電阻材料(liao)在工作過程中始終受到了聚氯乙烯PVC片(pian)(pian)(pian)的(de)(de)(de)絕緣保(bao)護。由于兩條銀導電電極均處(chu)于羥乙基纖(xian)維素HEC的(de)(de)(de)絕緣保(bao)護下，可(ke)有(you)效(xiao)防(fang)止兩電極間(jian)間(jian)距太小而引起(qi)的(de)(de)(de)電子(zi)遷移所造成的(de)(de)(de)電極間(jian)短路(lu)現象。該柔性單點(dian)(dian)力片(pian)(pian)(pian)式傳(chuan)感器只(zhi)有(you)電極引出(chu)片(pian)(pian)(pian)部(bu)分區(qu)域外露，因(yin)此具有(you)抗(kang)強(qiang)干擾的(de)(de)(de)優點(dian)(dian)。

本發明采(cai)用基于絲(si)網印刷工藝的制造方法(fa)，使(shi)制得的單(dan)點(dian)力(li)傳感器具(ju)有重量(liang)輕、體積小(xiao)(xiao)(片狀(zhuang))、成本低、制作簡單(dan)、可批量(liang)化(hua)生產的特點(dian)，并可重復使(shi)用、操作便(bian)捷。該(gai)傳感器可應用于工作空間狹小(xiao)(xiao)的某一點(dian)接觸物(wu)體間的壓(ya)力(li)或集(ji)中力(li)的檢測以(yi)及類似特殊應用場合。

附圖說明

圖1為本發明柔(rou)性單點力片式傳(chuan)感器結構示意圖。圖中：1、下(xia)基板；2、粘(zhan)接(jie)層(ceng)；3、電極(ji)引出片；4、上基板；5、電極(ji)保護膜；6、印(yin)刷電極(ji)；7、壓敏體。

圖2為圖1的(de)俯(fu)視其及(ji)印刷電極的(de)局部剖視圖。圖中：8、上基板凸起(qi)；9、電極連接片。

圖3為圖2的剖面圖。圖中：10、下基板凹陷(xian)。

圖4為本發明柔性(xing)單點(dian)力(li)片式傳感器一個應用(yong)實例的測量電路(lu)原理(li)圖。

具體(ti)實施方式

下面結合附圖及(ji)實施例對本(ben)發明(ming)作進一步的詳細說明(ming)。

如圖1-圖3所(suo)示，一(yi)(yi)(yi)種柔性單點力片(pian)(pian)(pian)(pian)式(shi)傳感器，包括上(shang)基(ji)(ji)(ji)(ji)板(ban)4和(he)下(xia)(xia)(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)1、壓(ya)敏(min)(min)體(ti)(ti)(ti)7、設置在壓(ya)敏(min)(min)體(ti)(ti)(ti)7垂(chui)直兩端(duan)面的(de)(de)(de)兩個(ge)電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)片(pian)(pian)(pian)(pian)9，上(shang)、下(xia)(xia)(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)之(zhi)間(jian)(jian)由環氧樹脂粘接(jie)層2封接(jie)；上(shang)、下(xia)(xia)(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)4、1可由聚(ju)氯乙(yi)烯(PVC)制成相同大(da)小(xiao)尺寸的(de)(de)(de)矩(ju)形基(ji)(ji)(ji)(ji)片(pian)(pian)(pian)(pian)；在靠近上(shang)基(ji)(ji)(ji)(ji)板(ban)4長度方(fang)向的(de)(de)(de)左側設置有一(yi)(yi)(yi)凸起8；在相對該(gai)凸起8的(de)(de)(de)下(xia)(xia)(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)上(shang)設置有一(yi)(yi)(yi)凹(ao)陷(xian)10，該(gai)凹(ao)陷(xian)與凸起之(zhi)間(jian)(jian)形成一(yi)(yi)(yi)個(ge)的(de)(de)(de)密(mi)閉(bi)壓(ya)敏(min)(min)體(ti)(ti)(ti)室，其(qi)中封裝有壓(ya)敏(min)(min)體(ti)(ti)(ti)7及電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)片(pian)(pian)(pian)(pian)9，壓(ya)敏(min)(min)體(ti)(ti)(ti)室的(de)(de)(de)大(da)小(xiao)剛(gang)好與壓(ya)敏(min)(min)體(ti)(ti)(ti)7的(de)(de)(de)大(da)小(xiao)吻(wen)合，壓(ya)敏(min)(min)體(ti)(ti)(ti)7為圓片(pian)(pian)(pian)(pian)或方(fang)塊形壓(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻；下(xia)(xia)(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)1上(shang)設置有兩條沿其(qi)長度方(fang)向相互平行(xing)的(de)(de)(de)印刷(shua)(shua)(shua)電(dian)(dian)(dian)(dian)極(ji)(ji)6，印刷(shua)(shua)(shua)電(dian)(dian)(dian)(dian)極(ji)(ji)6為銀導電(dian)(dian)(dian)(dian)帶狀薄膜。每條印刷(shua)(shua)(shua)電(dian)(dian)(dian)(dian)極(ji)(ji)在凹(ao)陷(xian)右(you)邊(bian)沿處的(de)(de)(de)一(yi)(yi)(yi)端(duan)連(lian)接(jie)一(yi)(yi)(yi)個(ge)電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)片(pian)(pian)(pian)(pian)9；遠離凹(ao)陷(xian)到下(xia)(xia)(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)1右(you)側處的(de)(de)(de)另一(yi)(yi)(yi)端(duan)連(lian)接(jie)一(yi)(yi)(yi)個(ge)電(dian)(dian)(dian)(dian)極(ji)(ji)引出片(pian)(pian)(pian)(pian)3，該(gai)電(dian)(dian)(dian)(dian)極(ji)(ji)引出片(pian)(pian)(pian)(pian)3外露下(xia)(xia)(xia)(xia)基(ji)(ji)(ji)(ji)板(ban)右(you)側；印刷(shua)(shua)(shua)電(dian)(dian)(dian)(dian)極(ji)(ji)6從連(lian)接(jie)電(dian)(dian)(dian)(dian)極(ji)(ji)連(lian)接(jie)片(pian)(pian)(pian)(pian)9到連(lian)接(jie)電(dian)(dian)(dian)(dian)極(ji)(ji)引出片(pian)(pian)(pian)(pian)3的(de)(de)(de)一(yi)(yi)(yi)段上(shang)表面設置有電(dian)(dian)(dian)(dian)極(ji)(ji)保(bao)護膜5，該(gai)電(dian)(dian)(dian)(dian)極(ji)(ji)保(bao)護膜為羥乙(yi)基(ji)(ji)(ji)(ji)纖維素(HEC)膜層。

以上柔(rou)性單點力片式傳感器(qi)制造方法，包括下述步驟：

a.先制備形(xing)狀(zhuang)大小相同的上(shang)基(ji)板和下基(ji)板，在上(shang)基(ji)板長度(du)方向的一側設(she)置一凸起(qi)；在相對該凸起(qi)的下基(ji)板上(shang)設(she)置一凹陷(xian)；

b.將下(xia)基板(ban)1固定(ding)在絲(si)網(wang)印刷(shua)(shua)機(ji)的印刷(shua)(shua)臺(tai)上，用導電(dian)料漿(jiang)沿下(xia)基板(ban)長度方(fang)向從遠離(li)凹陷一側(ce)到凹陷的上表面印制(zhi)兩條印刷(shua)(shua)電(dian)極，干燥(zao)后，在下(xia)基板(ban)遠離(li)凹陷的一側(ce)設置(zhi)兩個外露(lu)的電(dian)極引出片3。

c.在下(xia)基(ji)板(ban)凹陷(xian)中涂(tu)敷壓(ya)敏電(dian)阻(zu)油墨，并放置一個壓(ya)敏體(ti)，該壓(ya)敏體(ti)上(shang)(shang)、下(xia)端面(mian)事先分別(bie)焊接(jie)好兩(liang)個電(dian)極連(lian)接(jie)片(pian)9，位于壓(ya)敏體(ti)上(shang)(shang)、下(xia)端面(mian)的(de)(de)兩(liang)電(dian)極連(lian)接(jie)片(pian)9分別(bie)連(lian)接(jie)至位于下(xia)基(ji)板(ban)上(shang)(shang)的(de)(de)兩(liang)條印(yin)刷(shua)電(dian)極6，兩(liang)條印(yin)刷(shua)電(dian)極6的(de)(de)另一端連(lian)接(jie)外露(lu)的(de)(de)兩(liang)個電(dian)極引出片(pian)3；同(tong)時，在上(shang)(shang)基(ji)板(ban)4的(de)(de)凸起內表面(mian)上(shang)(shang)涂(tu)敷壓(ya)敏電(dian)阻(zu)油墨。

d.在下(xia)基板的兩條(tiao)印(yin)刷電極(ji)6上(shang)(shang)從連(lian)接(jie)(jie)電極(ji)連(lian)接(jie)(jie)片(pian)(pian)9到連(lian)接(jie)(jie)電極(ji)引(yin)出片(pian)(pian)3的一(yi)段上(shang)(shang)表面(mian)涂敷一(yi)層電極(ji)保護膜并干燥。

e.將(jiang)上、下基板用粘(zhan)接層復合，使所述凸起(qi)與凹(ao)陷之間形成一(yi)個的密閉壓(ya)(ya)敏(min)(min)體(ti)室，將(jiang)壓(ya)(ya)敏(min)(min)體(ti)及電極連(lian)接片封(feng)裝(zhuang)在其(qi)內(nei)，壓(ya)(ya)敏(min)(min)體(ti)室的大(da)小剛好與壓(ya)(ya)敏(min)(min)體(ti)的大(da)小吻合，同時兩(liang)條印刷電極相互平行。

當(dang)上述絲網印刷(shua)單點(dian)力片式傳感器與外(wai)接(jie)(jie)電路連接(jie)(jie)并通過(guo)能(neng)正常工(gong)作(zuo)的測試后，該(gai)傳感器外(wai)露部分電極(ji)引出片3與外(wai)接(jie)(jie)導線連接(jie)(jie)部分用絕緣硅膠將其覆(fu)蓋以防銀電極(ji)長期處于在空(kong)氣中被氧化而削弱(ruo)或喪失了其導電性能(neng)。

本發(fa)明柔性單點力片(pian)式傳感器(qi)的(de)(de)(de)檢測原理(li)如下：當(dang)處于點接觸狀態時物(wu)體間的(de)(de)(de)一(yi)(yi)集(ji)(ji)中(zhong)(zhong)載荷(he)(集(ji)(ji)中(zhong)(zhong)力)作用于壓敏(min)電(dian)(dian)阻(zu)7上(shang)時，壓敏(min)電(dian)(dian)阻(zu)因(yin)受(shou)到了(le)(le)壓力作用便(bian)(bian)發(fa)生(sheng)了(le)(le)一(yi)(yi)定的(de)(de)(de)壓縮變(bian)(bian)形(xing)，從而(er)引起了(le)(le)壓敏(min)電(dian)(dian)阻(zu)值的(de)(de)(de)變(bian)(bian)化，反(fan)映(ying)在(zai)電(dian)(dian)路上(shang)便(bian)(bian)是兩銀導電(dian)(dian)電(dian)(dian)極6之間電(dian)(dian)壓值的(de)(de)(de)改(gai)變(bian)(bian)；根(gen)據壓敏(min)電(dian)(dian)阻(zu)上(shang)電(dian)(dian)壓值相對(dui)于最(zui)初電(dian)(dian)壓值的(de)(de)(de)變(bian)(bian)化量便(bian)(bian)可(ke)反(fan)映(ying)出點接觸處壓力或(huo)集(ji)(ji)中(zhong)(zhong)載荷(he)的(de)(de)(de)大小。集(ji)(ji)中(zhong)(zhong)載荷(he)與(yu)(yu)軸向長度(du)(du)、電(dian)(dian)阻(zu)阻(zu)值與(yu)(yu)軸向長度(du)(du)的(de)(de)(de)關系(xi)(xi)、電(dian)(dian)壓與(yu)(yu)電(dian)(dian)阻(zu)的(de)(de)(de)關系(xi)(xi)如下：

ΔL=FLES---(1)

其中：L——壓敏電(dian)阻的原始厚(hou)度；

S——壓敏電阻的橫截面面積；

F——作用于壓敏電阻上的集(ji)中載荷；

E——壓敏電阻的彈性模量；

ΔL——壓敏電阻油墨(mo)厚度的改變量(liang)。

R=ρLS---(2)

其(qi)中：L——壓敏(min)電(dian)阻油墨的厚度(du)；

S——壓敏電阻油(you)墨的橫截面面積；

ρ——壓敏(min)電阻(zu)油墨的(de)電阻(zu)率；

R——壓敏電阻油墨的電阻值。

                U＝IR        (3)

其中：I——流經(jing)壓敏電阻(zu)的電流值；

R——壓敏電阻油墨的電阻值(zhi)；

U——壓敏電(dian)阻(zu)油(you)墨的電(dian)壓值；

如(ru)圖4所示(shi)(shi)，絲網印刷單點力(li)(li)片式傳(chuan)感(gan)器(qi)的(de)(de)(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻因(yin)(yin)為只受到軸(zhou)向壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)縮變(bian)(bian)(bian)(bian)(bian)(bian)(bian)形而引(yin)(yin)起(qi)了(le)其阻值(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)(bian)(bian)(bian)，因(yin)(yin)此在測量電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻可(ke)以(yi)(yi)(yi)被當(dang)(dang)作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中的(de)(de)(de)(de)(de)(de)(de)可(ke)變(bian)(bian)(bian)(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)(dian)阻對待；同時又由(you)(you)于壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)(bian)(bian)(bian)引(yin)(yin)起(qi)了(le)加在壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻兩端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)值(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)(bian)(bian)(bian)，因(yin)(yin)此壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻端(duan)電(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)(bian)(bian)(bian)(bian)(bian)可(ke)以(yi)(yi)(yi)被當(dang)(dang)作(zuo)檢測電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)(de)(de)(de)(de)輸(shu)(shu)(shu)(shu)入(ru)(ru)變(bian)(bian)(bian)(bian)(bian)(bian)(bian)量信(xin)(xin)(xin)號(hao)(hao)。由(you)(you)于單點力(li)(li)傳(chuan)感(gan)器(qi)的(de)(de)(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻因(yin)(yin)外(wai)力(li)(li)作(zuo)用(yong)(yong)而引(yin)(yin)起(qi)了(le)加在其兩端(duan)電(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)(bian)(bian)(bian)(bian)(bian)，反相(xiang)比例(li)放大(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)(de)(de)(de)(de)輸(shu)(shu)(shu)(shu)入(ru)(ru)端(duan)恰(qia)好是(shi)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻端(duan)電(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)(bian)(bian)(bian)(bian)(bian)端(duan)；因(yin)(yin)此壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻端(duan)電(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)(bian)(bian)(bian)(bian)(bian)必(bi)然引(yin)(yin)起(qi)了(le)反相(xiang)比例(li)放大(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)I輸(shu)(shu)(shu)(shu)出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)值(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)(bian)(bian)(bian)，也(ye)就(jiu)是(shi)說單點力(li)(li)傳(chuan)感(gan)器(qi)受外(wai)力(li)(li)作(zuo)用(yong)(yong)是(shi)可(ke)以(yi)(yi)(yi)引(yin)(yin)起(qi)測量電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中相(xiang)應電(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)(bian)(bian)(bian)(bian)(bian)的(de)(de)(de)(de)(de)(de)(de)。當(dang)(dang)外(wai)力(li)(li)作(zuo)用(yong)(yong)于單點力(li)(li)傳(chuan)感(gan)器(qi)后(hou)(hou)由(you)(you)于壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)(dian)(dian)阻值(zhi)(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)改(gai)(gai)變(bian)(bian)(bian)(bian)(bian)(bian)(bian)而產生了(le)一定的(de)(de)(de)(de)(de)(de)(de)微弱電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)(hao)，通(tong)(tong)(tong)過(guo)(guo)反相(xiang)比例(li)放大(da)器(qi)I將該信(xin)(xin)(xin)號(hao)(hao)放大(da)；然后(hou)(hou)再(zai)(zai)通(tong)(tong)(tong)過(guo)(guo)低通(tong)(tong)(tong)濾波器(qi)將其他高(gao)頻干擾信(xin)(xin)(xin)號(hao)(hao)過(guo)(guo)濾或者(zhe)去除；接著再(zai)(zai)通(tong)(tong)(tong)過(guo)(guo)反相(xiang)比例(li)放大(da)器(qi)II將電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)(hao)還原到最初的(de)(de)(de)(de)(de)(de)(de)相(xiang)位(因(yin)(yin)為前后(hou)(hou)經(jing)(jing)過(guo)(guo)了(le)兩次(ci)反相(xiang)放大(da)，因(yin)(yin)此經(jing)(jing)過(guo)(guo)處(chu)(chu)(chu)理(li)(li)后(hou)(hou)的(de)(de)(de)(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)可(ke)以(yi)(yi)(yi)恢復到原來的(de)(de)(de)(de)(de)(de)(de)正電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)值(zhi)(zhi)(zhi)，同時將微弱電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)(hao)值(zhi)(zhi)(zhi)放大(da)了(le))；最后(hou)(hou)再(zai)(zai)通(tong)(tong)(tong)過(guo)(guo)A/D轉換器(qi)限壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)轉換將外(wai)力(li)(li)引(yin)(yin)起(qi)的(de)(de)(de)(de)(de)(de)(de)并經(jing)(jing)過(guo)(guo)處(chu)(chu)(chu)理(li)(li)的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)(hao)轉換為計算機能(neng)識別(bie)的(de)(de)(de)(de)(de)(de)(de)數字電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)信(xin)(xin)(xin)號(hao)(hao)，當(dang)(dang)然也(ye)可(ke)以(yi)(yi)(yi)直接將反相(xiang)比例(li)放大(da)器(qi)II處(chu)(chu)(chu)理(li)(li)后(hou)(hou)的(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)信(xin)(xin)(xin)號(hao)(hao)直接輸(shu)(shu)(shu)(shu)入(ru)(ru)至可(ke)以(yi)(yi)(yi)接收該信(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)(de)(de)(de)模擬(ni)顯示(shi)(shi)儀器(qi)或處(chu)(chu)(chu)理(li)(li)儀器(qi)例(li)如(ru)模擬(ni)信(xin)(xin)(xin)號(hao)(hao)示(shi)(shi)波顯示(shi)(shi)器(qi)或者(zhe)模擬(ni)信(xin)(xin)(xin)號(hao)(hao)處(chu)(chu)(chu)理(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)板。