技術領域

本發明涉(she)(she)及一種(zhong)(zhong)傳(chuan)感器(qi)及其制造方(fang)法，特別涉(she)(she)及一種(zhong)(zhong)用于在某(mou)一狹小接(jie)觸(chu)區域中對一點接(jie)觸(chu)物體間的壓(ya)力或(huo)集中力進行檢測的柔性單點力片式傳(chuan)感器(qi)及其制造方(fang)法。

背景技術

壓力(li)(li)傳感(gan)器(qi)及檢(jian)(jian)測技術在(zai)航(hang)空航(hang)天(tian)、軍事工(gong)(gong)業(ye)(ye)、汽(qi)車、船舶制造、工(gong)(gong)業(ye)(ye)自動化(hua)、醫學研究(jiu)、生物(wu)醫療等(deng)領(ling)(ling)域中發揮著重要(yao)的(de)(de)作用(yong)。然而在(zai)上述應用(yong)領(ling)(ling)域，許多場合(he)需在(zai)某(mou)(mou)一狹(xia)小空間中對某(mou)(mou)一點接觸(chu)物(wu)體間的(de)(de)壓力(li)(li)或集中力(li)(li)進行檢(jian)(jian)測，例(li)如點接觸(chu)物(wu)體間在(zai)運動過程(cheng)中摩擦力(li)(li)相(xiang)互(hu)(hu)(hu)作用(yong)過程(cheng)的(de)(de)研究(jiu)、例(li)如檢(jian)(jian)測空間凸輪(lun)與滾(gun)子從(cong)動件處于點接觸(chu)狀態下(xia)的(de)(de)相(xiang)互(hu)(hu)(hu)作用(yong)力(li)(li)、檢(jian)(jian)測某(mou)(mou)一對牙(ya)齒嚙合(he)時(shi)的(de)(de)相(xiang)互(hu)(hu)(hu)作用(yong)力(li)(li)等(deng)。由于受到傳感(gan)器(qi)重量、體積以(yi)及工(gong)(gong)作空間(如狹(xia)縫)的(de)(de)限制，這時(shi)傳統壓力(li)(li)傳感(gan)器(qi)便(bian)(bian)不(bu)能用(yong)于上述場合(he)下(xia)的(de)(de)使用(yong)來(lai)檢(jian)(jian)測某(mou)(mou)一點接觸(chu)物(wu)體間的(de)(de)壓力(li)(li)或集中力(li)(li)。即(ji)便(bian)(bian)勉(mian)強使用(yong)，也不(bu)能滿足(zu)操(cao)作便(bian)(bian)捷的(de)(de)要(yao)求，

發明內容

本(ben)發明(ming)針對傳統壓力傳感(gan)器不能(neng)對某一(yi)點接(jie)觸物(wu)體(ti)間(jian)壓力進行(xing)檢(jian)測(ce)、體(ti)積(ji)大、重量重、操(cao)作(zuo)不方便的(de)缺(que)點；提供了(le)一(yi)種能(neng)夠檢(jian)測(ce)出某一(yi)點接(jie)觸物(wu)體(ti)間(jian)壓力的(de)柔性(xing)單點力片式傳感(gan)器，該傳感(gan)器具有體(ti)積(ji)小、重量輕、制作(zuo)簡單、可低成(cheng)本(ben)批量化生(sheng)產(chan)的(de)特點，并(bing)且可重復使用、操(cao)作(zuo)簡便。

本發明的另(ling)一(yi)個目的是提供一(yi)種該傳感器的制造(zao)方(fang)法。

為(wei)達到上述目的，本發明是采取如下技術方案予(yu)以實現的：

一(yi)(yi)種(zhong)柔性單點力片(pian)式傳感器，包(bao)括(kuo)壓(ya)敏(min)(min)(min)(min)體(ti)、分別設置在壓(ya)敏(min)(min)(min)(min)體(ti)上(shang)下(xia)端面(mian)的(de)(de)兩個電(dian)(dian)極連(lian)(lian)(lian)(lian)接(jie)(jie)片(pian)，其特征(zheng)在于(yu)，還(huan)包(bao)括(kuo)有(you)(you)形(xing)狀大小(xiao)相(xiang)同的(de)(de)上(shang)基(ji)(ji)板(ban)(ban)(ban)和下(xia)基(ji)(ji)板(ban)(ban)(ban)，上(shang)、下(xia)基(ji)(ji)板(ban)(ban)(ban)之(zhi)間由粘接(jie)(jie)層封(feng)接(jie)(jie)；在上(shang)基(ji)(ji)板(ban)(ban)(ban)長度(du)方向(xiang)(xiang)的(de)(de)一(yi)(yi)側設置有(you)(you)一(yi)(yi)凸(tu)起(qi)；在相(xiang)對該(gai)凸(tu)起(qi)的(de)(de)下(xia)基(ji)(ji)板(ban)(ban)(ban)上(shang)設置有(you)(you)一(yi)(yi)凹陷，該(gai)凹陷與所(suo)(suo)述(shu)凸(tu)起(qi)之(zhi)間形(xing)成一(yi)(yi)個密閉的(de)(de)壓(ya)敏(min)(min)(min)(min)體(ti)室，其中封(feng)裝(zhuang)有(you)(you)所(suo)(suo)述(shu)的(de)(de)壓(ya)敏(min)(min)(min)(min)體(ti)及電(dian)(dian)極連(lian)(lian)(lian)(lian)接(jie)(jie)片(pian)，所(suo)(suo)述(shu)壓(ya)敏(min)(min)(min)(min)體(ti)室的(de)(de)大小(xiao)剛(gang)好與壓(ya)敏(min)(min)(min)(min)體(ti)的(de)(de)大小(xiao)吻(wen)合；所(suo)(suo)述(shu)下(xia)基(ji)(ji)板(ban)(ban)(ban)1沿其長度(du)方向(xiang)(xiang)設置有(you)(you)兩條相(xiang)互平行的(de)(de)印(yin)刷(shua)電(dian)(dian)極6，每個印(yin)刷(shua)電(dian)(dian)極分別連(lian)(lian)(lian)(lian)接(jie)(jie)位于(yu)壓(ya)敏(min)(min)(min)(min)體(ti)上(shang)或(huo)下(xia)端面(mian)的(de)(de)電(dian)(dian)極連(lian)(lian)(lian)(lian)接(jie)(jie)片(pian)9和伸出(chu)下(xia)基(ji)(ji)板(ban)(ban)(ban)的(de)(de)電(dian)(dian)極引出(chu)片(pian)3；所(suo)(suo)述(shu)下(xia)基(ji)(ji)板(ban)(ban)(ban)上(shang)的(de)(de)兩條印(yin)刷(shua)電(dian)(dian)極6從連(lian)(lian)(lian)(lian)接(jie)(jie)電(dian)(dian)極連(lian)(lian)(lian)(lian)接(jie)(jie)片(pian)9到(dao)連(lian)(lian)(lian)(lian)接(jie)(jie)電(dian)(dian)極引出(chu)片(pian)3一(yi)(yi)段(duan)的(de)(de)上(shang)表面(mian)設置有(you)(you)電(dian)(dian)極保(bao)護膜。

一種上述柔性單點力片(pian)式傳感(gan)器(qi)的制(zhi)造方法，其(qi)特征在于，包(bao)括如下步驟：

a.先制備形(xing)狀(zhuang)大(da)小相同的(de)上基(ji)板和下基(ji)板，在(zai)上基(ji)板長度方向的(de)一(yi)側設置一(yi)凸(tu)(tu)起(qi)(qi)；在(zai)相對該凸(tu)(tu)起(qi)(qi)的(de)下基(ji)板上設置一(yi)凹陷；

b.將下基(ji)板1固定在(zai)(zai)絲(si)網印刷(shua)機的(de)印刷(shua)臺(tai)上，用(yong)導電料漿沿下基(ji)板長度方向從遠離凹(ao)陷(xian)一側到(dao)凹(ao)陷(xian)的(de)上表(biao)面印制兩(liang)條印刷(shua)電極，干燥后，在(zai)(zai)下基(ji)板遠離凹(ao)陷(xian)的(de)一側設置兩(liang)個外露(lu)的(de)電極引出片3。

c.在(zai)下基板凹陷中涂(tu)敷(fu)壓敏(min)電阻油墨，并放(fang)置一(yi)個壓敏(min)體，該壓敏(min)體上(shang)(shang)、下端(duan)(duan)面事先分別焊接(jie)好兩(liang)個電極(ji)(ji)連接(jie)片(pian)9，位于壓敏(min)體上(shang)(shang)、下端(duan)(duan)面的兩(liang)電極(ji)(ji)連接(jie)片(pian)9分別連接(jie)至位于下基板上(shang)(shang)的兩(liang)條(tiao)印刷電極(ji)(ji)6的一(yi)端(duan)(duan)，兩(liang)條(tiao)印刷電極(ji)(ji)6的另一(yi)端(duan)(duan)連接(jie)外露(lu)的兩(liang)個電極(ji)(ji)引(yin)出片(pian)3；同時，在(zai)上(shang)(shang)基板4的凸起內表面上(shang)(shang)涂(tu)敷(fu)壓敏(min)電阻油墨。

d.在下基板的(de)兩條(tiao)印刷(shua)電極(ji)6上(shang)從連接(jie)電極(ji)連接(jie)片9到連接(jie)電極(ji)引出片3的(de)一段上(shang)表(biao)面涂敷(fu)一層(ceng)電極(ji)保護膜(mo)并干燥。

e.將上、下基板用粘接層復合，使(shi)所述(shu)凸(tu)起與凹陷之間(jian)形成一個(ge)的密閉(bi)壓敏(min)(min)體室，將壓敏(min)(min)體及電(dian)極連(lian)接片封(feng)裝在其(qi)內，壓敏(min)(min)體室的大小(xiao)剛好(hao)與壓敏(min)(min)體的大小(xiao)吻(wen)合，同時兩條印刷電(dian)極相互平行。

以上方法中，所述的印刷電(dian)極用(yong)(yong)導電(dian)漿(jiang)料(liao)為銀導電(dian)漿(jiang)料(liao)；所述的電(dian)極保護膜材(cai)料(liao)采用(yong)(yong)羥乙基纖維素(su)；所述的壓(ya)敏電(dian)阻油(you)(you)墨采用(yong)(yong)碳二硫化鉬油(you)(you)墨；所述的上、下基板采用(yong)(yong)聚(ju)氯乙烯材(cai)料(liao)制成矩形基片(pian)；所述的粘接層采用(yong)(yong)環(huan)氧樹脂(zhi)。

本發(fa)明的(de)(de)(de)(de)柔(rou)性(xing)單(dan)點力片(pian)式傳(chuan)感(gan)器(qi)不(bu)需要外加保護裝(zhuang)置，不(bu)用將壓(ya)敏(min)電(dian)阻直接置入被(bei)測對(dui)象內部(bu)，只需將被(bei)測對(dui)象的(de)(de)(de)(de)點接觸(chu)部(bu)位(wei)與壓(ya)敏(min)電(dian)阻所(suo)對(dui)應的(de)(de)(de)(de)壓(ya)敏(min)體(ti)室(shi)的(de)(de)(de)(de)聚(ju)氯(lv)乙(yi)烯(xi)PVC絕緣基片(pian)直接接觸(chu)即可(ke)；同時壓(ya)敏(min)電(dian)阻材料(liao)在工作過(guo)程(cheng)中始終受(shou)到了聚(ju)氯(lv)乙(yi)烯(xi)PVC片(pian)的(de)(de)(de)(de)絕緣保護。由于兩(liang)條銀導電(dian)電(dian)極均處于羥(qian)乙(yi)基纖維素HEC的(de)(de)(de)(de)絕緣保護下，可(ke)有(you)效防止兩(liang)電(dian)極間間距太小而(er)引起的(de)(de)(de)(de)電(dian)子遷移所(suo)造成的(de)(de)(de)(de)電(dian)極間短路(lu)現象。該柔(rou)性(xing)單(dan)點力片(pian)式傳(chuan)感(gan)器(qi)只有(you)電(dian)極引出片(pian)部(bu)分區域外露，因此具有(you)抗強干擾的(de)(de)(de)(de)優點。

本發明采用基于絲網印(yin)刷工藝的(de)(de)(de)制造方法(fa)，使(shi)制得的(de)(de)(de)單點力傳感(gan)器(qi)具有重量輕、體積小(片狀)、成本低、制作簡單、可批量化生產的(de)(de)(de)特點，并可重復使(shi)用、操作便捷。該(gai)傳感(gan)器(qi)可應(ying)用于工作空間(jian)狹小的(de)(de)(de)某(mou)一點接觸物(wu)體間(jian)的(de)(de)(de)壓力或集中力的(de)(de)(de)檢測以(yi)及類似特殊應(ying)用場(chang)合。

附圖說明

圖(tu)1為(wei)本發明柔性單(dan)點力片(pian)(pian)式傳感器結構示意圖(tu)。圖(tu)中：1、下基(ji)板；2、粘接(jie)層；3、電極(ji)引出片(pian)(pian)；4、上(shang)基(ji)板；5、電極(ji)保護膜；6、印刷電極(ji)；7、壓敏(min)體(ti)。

圖2為圖1的俯視其及(ji)印刷電極(ji)的局部剖視圖。圖中：8、上基板凸起；9、電極(ji)連(lian)接片。

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

圖4為本(ben)發明柔性單點力片式傳感器一個應用(yong)實例(li)的測量電路(lu)原(yuan)理圖。

具體實施方(fang)式(shi)

下面結合(he)附圖及實施例對本(ben)發明作進一步的詳細說明。

如圖(tu)1-圖(tu)3所(suo)示，一(yi)(yi)(yi)種柔(rou)性單點力片(pian)式傳感器，包(bao)括上(shang)(shang)(shang)(shang)基板(ban)(ban)(ban)(ban)4和下(xia)基板(ban)(ban)(ban)(ban)1、壓(ya)(ya)敏(min)體(ti)7、設(she)(she)置在(zai)(zai)壓(ya)(ya)敏(min)體(ti)7垂直兩端(duan)(duan)面的(de)(de)(de)兩個(ge)(ge)電(dian)極(ji)(ji)(ji)(ji)連(lian)(lian)(lian)接(jie)片(pian)9，上(shang)(shang)(shang)(shang)、下(xia)基板(ban)(ban)(ban)(ban)之(zhi)間由環氧樹脂粘接(jie)層2封接(jie)；上(shang)(shang)(shang)(shang)、下(xia)基板(ban)(ban)(ban)(ban)4、1可(ke)由聚氯乙烯(xi)(PVC)制成相(xiang)(xiang)同大小尺寸(cun)的(de)(de)(de)矩形基片(pian)；在(zai)(zai)靠近上(shang)(shang)(shang)(shang)基板(ban)(ban)(ban)(ban)4長度(du)方(fang)向的(de)(de)(de)左側設(she)(she)置有一(yi)(yi)(yi)凸起(qi)(qi)8；在(zai)(zai)相(xiang)(xiang)對該(gai)凸起(qi)(qi)8的(de)(de)(de)下(xia)基板(ban)(ban)(ban)(ban)上(shang)(shang)(shang)(shang)設(she)(she)置有一(yi)(yi)(yi)凹(ao)陷(xian)(xian)10，該(gai)凹(ao)陷(xian)(xian)與凸起(qi)(qi)之(zhi)間形成一(yi)(yi)(yi)個(ge)(ge)的(de)(de)(de)密閉壓(ya)(ya)敏(min)體(ti)室，其中封裝有壓(ya)(ya)敏(min)體(ti)7及電(dian)極(ji)(ji)(ji)(ji)連(lian)(lian)(lian)接(jie)片(pian)9，壓(ya)(ya)敏(min)體(ti)室的(de)(de)(de)大小剛好與壓(ya)(ya)敏(min)體(ti)7的(de)(de)(de)大小吻(wen)合(he)，壓(ya)(ya)敏(min)體(ti)7為(wei)圓(yuan)片(pian)或方(fang)塊形壓(ya)(ya)敏(min)電(dian)阻；下(xia)基板(ban)(ban)(ban)(ban)1上(shang)(shang)(shang)(shang)設(she)(she)置有兩條(tiao)沿其長度(du)方(fang)向相(xiang)(xiang)互平(ping)行的(de)(de)(de)印刷電(dian)極(ji)(ji)(ji)(ji)6，印刷電(dian)極(ji)(ji)(ji)(ji)6為(wei)銀導電(dian)帶狀薄膜。每條(tiao)印刷電(dian)極(ji)(ji)(ji)(ji)在(zai)(zai)凹(ao)陷(xian)(xian)右邊沿處(chu)(chu)的(de)(de)(de)一(yi)(yi)(yi)端(duan)(duan)連(lian)(lian)(lian)接(jie)一(yi)(yi)(yi)個(ge)(ge)電(dian)極(ji)(ji)(ji)(ji)連(lian)(lian)(lian)接(jie)片(pian)9；遠離凹(ao)陷(xian)(xian)到(dao)下(xia)基板(ban)(ban)(ban)(ban)1右側處(chu)(chu)的(de)(de)(de)另(ling)一(yi)(yi)(yi)端(duan)(duan)連(lian)(lian)(lian)接(jie)一(yi)(yi)(yi)個(ge)(ge)電(dian)極(ji)(ji)(ji)(ji)引出(chu)(chu)片(pian)3，該(gai)電(dian)極(ji)(ji)(ji)(ji)引出(chu)(chu)片(pian)3外(wai)露下(xia)基板(ban)(ban)(ban)(ban)右側；印刷電(dian)極(ji)(ji)(ji)(ji)6從連(lian)(lian)(lian)接(jie)電(dian)極(ji)(ji)(ji)(ji)連(lian)(lian)(lian)接(jie)片(pian)9到(dao)連(lian)(lian)(lian)接(jie)電(dian)極(ji)(ji)(ji)(ji)引出(chu)(chu)片(pian)3的(de)(de)(de)一(yi)(yi)(yi)段上(shang)(shang)(shang)(shang)表面設(she)(she)置有電(dian)極(ji)(ji)(ji)(ji)保護膜5，該(gai)電(dian)極(ji)(ji)(ji)(ji)保護膜為(wei)羥(qian)乙基纖(xian)維(wei)素(HEC)膜層。

以上柔性單點力(li)片式傳(chuan)感器制造(zao)方(fang)法，包括下述步(bu)驟：

a.先制備形(xing)狀大小相(xiang)同的(de)上(shang)(shang)基板(ban)和下基板(ban)，在上(shang)(shang)基板(ban)長度方向的(de)一(yi)側設(she)置一(yi)凸起(qi)；在相(xiang)對(dui)該凸起(qi)的(de)下基板(ban)上(shang)(shang)設(she)置一(yi)凹陷；

b.將下基板(ban)1固定在絲網印刷機的印刷臺上，用導電(dian)料漿沿下基板(ban)長(chang)度方向從遠(yuan)離凹(ao)陷一側到(dao)凹(ao)陷的上表面印制兩條印刷電(dian)極，干(gan)燥后(hou)，在下基板(ban)遠(yuan)離凹(ao)陷的一側設置兩個外露的電(dian)極引出片3。

c.在下(xia)(xia)基板(ban)凹(ao)陷中涂敷壓(ya)敏(min)電阻油(you)墨，并放置一個(ge)壓(ya)敏(min)體(ti)(ti)，該壓(ya)敏(min)體(ti)(ti)上、下(xia)(xia)端面(mian)(mian)事先(xian)分別(bie)焊(han)接(jie)好兩個(ge)電極(ji)連(lian)接(jie)片9，位(wei)于壓(ya)敏(min)體(ti)(ti)上、下(xia)(xia)端面(mian)(mian)的兩電極(ji)連(lian)接(jie)片9分別(bie)連(lian)接(jie)至位(wei)于下(xia)(xia)基板(ban)上的兩條印刷電極(ji)6，兩條印刷電極(ji)6的另一端連(lian)接(jie)外露的兩個(ge)電極(ji)引出片3；同時，在上基板(ban)4的凸起內表面(mian)(mian)上涂敷壓(ya)敏(min)電阻油(you)墨。

d.在下基板的(de)兩條印(yin)刷電(dian)極(ji)6上(shang)從連接電(dian)極(ji)連接片9到連接電(dian)極(ji)引出片3的(de)一(yi)段上(shang)表(biao)面涂敷(fu)一(yi)層(ceng)電(dian)極(ji)保護膜并干燥(zao)。

e.將上、下(xia)基板(ban)用粘接(jie)(jie)層復(fu)合(he)，使所述凸起與(yu)凹陷(xian)之間(jian)形成(cheng)一(yi)個(ge)的(de)密閉(bi)壓敏體(ti)室，將壓敏體(ti)及電極連接(jie)(jie)片(pian)封裝在其(qi)內，壓敏體(ti)室的(de)大小(xiao)剛(gang)好與(yu)壓敏體(ti)的(de)大小(xiao)吻合(he)，同時(shi)兩(liang)條(tiao)印刷(shua)電極相(xiang)互平行。

當上述絲網印刷單(dan)點力片式傳(chuan)感器與外(wai)接(jie)(jie)電(dian)路連接(jie)(jie)并(bing)通(tong)過能(neng)正常工作的測試(shi)后，該傳(chuan)感器外(wai)露部分電(dian)極(ji)引出片3與外(wai)接(jie)(jie)導(dao)(dao)線連接(jie)(jie)部分用絕緣硅膠將其覆蓋以防銀(yin)電(dian)極(ji)長(chang)期處于在空氣(qi)中被氧化而削弱(ruo)或喪失了其導(dao)(dao)電(dian)性能(neng)。

本發明(ming)柔(rou)性單點(dian)(dian)力(li)片式傳感器(qi)的(de)檢測(ce)原(yuan)理如(ru)下：當處(chu)于(yu)點(dian)(dian)接觸狀態時(shi)物體間的(de)一集(ji)(ji)中載荷(集(ji)(ji)中力(li))作用(yong)于(yu)壓(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)7上(shang)(shang)時(shi)，壓(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)因受到了(le)(le)壓(ya)(ya)(ya)力(li)作用(yong)便發生了(le)(le)一定的(de)壓(ya)(ya)(ya)縮變形，從(cong)而引(yin)起了(le)(le)壓(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)值(zhi)的(de)變化，反映在電(dian)(dian)(dian)(dian)路上(shang)(shang)便是(shi)兩銀導電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)極6之間電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)的(de)改(gai)變；根據壓(ya)(ya)(ya)敏(min)(min)電(dian)(dian)(dian)(dian)阻(zu)上(shang)(shang)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)相對于(yu)最初電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)值(zhi)的(de)變化量便可(ke)反映出點(dian)(dian)接觸處(chu)壓(ya)(ya)(ya)力(li)或集(ji)(ji)中載荷的(de)大小。集(ji)(ji)中載荷與(yu)軸向長度、電(dian)(dian)(dian)(dian)阻(zu)阻(zu)值(zhi)與(yu)軸向長度的(de)關(guan)(guan)系(xi)、電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)與(yu)電(dian)(dian)(dian)(dian)阻(zu)的(de)關(guan)(guan)系(xi)如(ru)下：

ΔL=FLES---(1)

其中：L——壓敏電(dian)阻(zu)的(de)原始厚度；

S——壓敏電(dian)阻的橫截(jie)面面積(ji)；

F——作用于壓敏電阻上的集中載荷；

E——壓敏電阻的彈性模量；

ΔL——壓敏電阻油墨厚度的改變量。

R=ρLS---(2)

其中：L——壓敏電阻油墨的厚度；

S——壓敏電阻油墨的橫截面面積；

ρ——壓敏電阻油墨的電阻率(lv)；

R——壓敏電阻油墨的(de)電阻值。

                U＝IR        (3)

其中：I——流經壓敏(min)電(dian)阻的電(dian)流值；

R——壓敏(min)電阻油墨(mo)的(de)電阻值；

U——壓敏(min)電阻油墨(mo)的電壓值；

如圖4所示，絲網(wang)印(yin)刷單(dan)點(dian)力(li)(li)(li)片式傳感器的(de)(de)壓(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)因(yin)為(wei)只受(shou)到軸(zhou)向壓(ya)(ya)(ya)(ya)縮變(bian)形而引(yin)起(qi)(qi)了其(qi)阻(zu)(zu)(zu)(zu)值(zhi)的(de)(de)改(gai)(gai)(gai)(gai)變(bian)，因(yin)此在測(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中壓(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)可以(yi)被(bei)當作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中的(de)(de)可變(bian)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)對(dui)待；同時(shi)又(you)由于壓(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)的(de)(de)改(gai)(gai)(gai)(gai)變(bian)引(yin)起(qi)(qi)了加(jia)在壓(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)兩(liang)端(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)的(de)(de)改(gai)(gai)(gai)(gai)變(bian)，因(yin)此壓(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)端(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)改(gai)(gai)(gai)(gai)變(bian)可以(yi)被(bei)當作(zuo)(zuo)檢測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)輸(shu)入(ru)變(bian)量(liang)信(xin)(xin)號(hao)(hao)(hao)。由于單(dan)點(dian)力(li)(li)(li)傳感器的(de)(de)壓(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)因(yin)外力(li)(li)(li)作(zuo)(zuo)用(yong)而引(yin)起(qi)(qi)了加(jia)在其(qi)兩(liang)端(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)改(gai)(gai)(gai)(gai)變(bian)，反(fan)相(xiang)(xiang)比(bi)(bi)例放(fang)(fang)大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)輸(shu)入(ru)端(duan)(duan)恰好是(shi)壓(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)端(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)改(gai)(gai)(gai)(gai)變(bian)端(duan)(duan)；因(yin)此壓(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)端(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)改(gai)(gai)(gai)(gai)變(bian)必然(ran)引(yin)起(qi)(qi)了反(fan)相(xiang)(xiang)比(bi)(bi)例放(fang)(fang)大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)I輸(shu)出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)的(de)(de)改(gai)(gai)(gai)(gai)變(bian)，也就是(shi)說單(dan)點(dian)力(li)(li)(li)傳感器受(shou)外力(li)(li)(li)作(zuo)(zuo)用(yong)是(shi)可以(yi)引(yin)起(qi)(qi)測(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中相(xiang)(xiang)應電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)(de)改(gai)(gai)(gai)(gai)變(bian)的(de)(de)。當外力(li)(li)(li)作(zuo)(zuo)用(yong)于單(dan)點(dian)力(li)(li)(li)傳感器后(hou)由于壓(ya)(ya)(ya)(ya)敏電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)值(zhi)的(de)(de)改(gai)(gai)(gai)(gai)變(bian)而產生(sheng)了一定的(de)(de)微(wei)弱電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)(hao)，通過(guo)反(fan)相(xiang)(xiang)比(bi)(bi)例放(fang)(fang)大(da)(da)器I將(jiang)(jiang)該信(xin)(xin)號(hao)(hao)(hao)放(fang)(fang)大(da)(da)；然(ran)后(hou)再(zai)通過(guo)低通濾波器將(jiang)(jiang)其(qi)他高頻干擾(rao)信(xin)(xin)號(hao)(hao)(hao)過(guo)濾或者去除(chu)；接(jie)(jie)著再(zai)通過(guo)反(fan)相(xiang)(xiang)比(bi)(bi)例放(fang)(fang)大(da)(da)器II將(jiang)(jiang)電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)(hao)還原(yuan)到最初的(de)(de)相(xiang)(xiang)位(因(yin)為(wei)前后(hou)經過(guo)了兩(liang)次(ci)反(fan)相(xiang)(xiang)放(fang)(fang)大(da)(da)，因(yin)此經過(guo)處(chu)理(li)(li)(li)后(hou)的(de)(de)信(xin)(xin)號(hao)(hao)(hao)可以(yi)恢復到原(yuan)來(lai)的(de)(de)正電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)值(zhi)，同時(shi)將(jiang)(jiang)微(wei)弱電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)(hao)值(zhi)放(fang)(fang)大(da)(da)了)；最后(hou)再(zai)通過(guo)A/D轉換器限壓(ya)(ya)(ya)(ya)轉換將(jiang)(jiang)外力(li)(li)(li)引(yin)起(qi)(qi)的(de)(de)并經過(guo)處(chu)理(li)(li)(li)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)(hao)轉換為(wei)計算機能識(shi)別的(de)(de)數字電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)信(xin)(xin)號(hao)(hao)(hao)，當然(ran)也可以(yi)直接(jie)(jie)將(jiang)(jiang)反(fan)相(xiang)(xiang)比(bi)(bi)例放(fang)(fang)大(da)(da)器II處(chu)理(li)(li)(li)后(hou)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)信(xin)(xin)號(hao)(hao)(hao)直接(jie)(jie)輸(shu)入(ru)至可以(yi)接(jie)(jie)收(shou)該信(xin)(xin)號(hao)(hao)(hao)的(de)(de)模擬顯(xian)示儀(yi)器或處(chu)理(li)(li)(li)儀(yi)器例如模擬信(xin)(xin)號(hao)(hao)(hao)示波顯(xian)示器或者模擬信(xin)(xin)號(hao)(hao)(hao)處(chu)理(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)板。