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拉壓式傳感器應用舉例

信息來源:本站 | 發布日期: 2023-07-13 13:19:58 | 瀏覽量:428

摘要:

采用拉壓式傳(chuan)感器的電(dian)子秤(cheng),這種傳(chuan)感器和普(pu)通(tong)壓力傳(chuan)感器相比準確度高(gao)、價格(ge)較(jiao)便宜(yi)、不(bu)易損壞,因此應(ying)用前景(jing)廣泛。該電(dian)子秤(cheng)可用于(yu)工(gong)廠(chang)生產中配料(liao)和測力等場合,具有測量準確,分辨率高(gao),不(bu)易損壞和價格(ge)便宜(yi)等優(you)點。 主集(ji)成城mc14433為a/d轉換集(ji)成塊(kuai),4511為led顯示驅動集(ji)成…

采用拉壓(ya)式(shi)傳感器(qi)的電子秤,這種傳感器(qi)和普通壓(ya)力(li)傳感器(qi)相比(bi)準確度(du)高(gao)、價(jia)格較(jiao)便(bian)宜、不(bu)易損(sun)壞,因(yin)此應用前景廣泛。該(gai)電子秤可用于工廠生(sheng)產中配料和測力(li)等(deng)場合,具有(you)測量準確,分辨(bian)率高(gao),不(bu)易損(sun)壞和價(jia)格便(bian)宜等(deng)優點。  

主集成(cheng)城mc14433為a/d轉換(huan)集成(cheng)塊(kuai),4511為led顯示(shi)驅(qu)動(dong)集成(cheng)塊(kuai)1413為位選片(pian)子(zi),1403提(ti)供(gong)主集成(cheng)電(dian)(dian)路一穩(wen)(wen)定比較電(dian)(dian)壓(ya)(ya),7650為斬(zhan)波(bo)(bo)穩(wen)(wen)零(ling)單片(pian)集成(cheng)運算放大器,放大傳感(gan)器輸出的(de)電(dian)(dian)壓(ya)(ya)信號。傳感(gan)器用(yong)blr型拉壓(ya)(ya)式傳感(gan)器,ra、rb、rc、rd為傳感(gan)器中應變電(dian)(dian)阻。穩(wen)(wen)壓(ya)(ya)電(dian)(dian)路7805向整個電(dian)(dian)路提(ti)供(gong)5v電(dian)(dian)壓(ya)(ya),7805的(de)輸人電(dian)(dian)壓(ya)(ya)在 8-15v時正(zheng)常工作。也可(ke)用(yong)交流220 v降壓(ya)(ya)、整流、濾波(bo)(bo)后,提(ti)供(gong)給儀(yi)器使用(yong)。  

由于(yu)(yu)儀器(qi)用于(yu)(yu)精度較高(gao)場合,因此(ci)14433、1403、7650外圍(wei)的(de)阻(zu)(zu)容元件,應(ying)(ying)選(xuan)用低溫度系(xi)數、熱穩定性好的(de),電(dian)阻(zu)(zu)應(ying)(ying)選(xuan)用rj金(jin)屬膜電(dian)阻(zu)(zu)。7650兩(liang)支1k的(de)電(dian)阻(zu)(zu)差(cha)(cha)值(zhi)和re、rf兩(liang)電(dian)阻(zu)(zu)的(de)差(cha)(cha)值(zhi)應(ying)(ying)小(xiao)(xiao)(xiao)于(yu)(yu) l%,否(fou)則秤裝完后(hou)有可能調零時(shi)(shi)調不到(dao)零點(dian)。re、rf阻(zu)(zu)值(zhi)的(de)取值(zhi)范(fan)圍(wei)為幾(ji)十k到(dao)幾(ji)百k之間(jian),視所選(xuan)用的(de)傳(chuan)感(gan)器(qi)大(da)小(xiao)(xiao)(xiao)而(er)定。傳(chuan)感(gan)器(qi)量(liang)程小(xiao)(xiao)(xiao),如(ru)200kg,阻(zu)(zu)值(zhi)就(jiu)選(xuan)小(xiao)(xiao)(xiao)一些,量(liang)程大(da),如(ru) 2000kg,阻(zu)(zu)值(zhi)就(jiu)選(xuan)大(da)一些。如(ru)要用小(xiao)(xiao)(xiao)數點(dian)表示,小(xiao)(xiao)(xiao)數點(dian)電(dian)阻(zu)(zu)接(jie)v+,用小(xiao)(xiao)(xiao)于(yu)(yu)200kg量(liang)程的(de)傳(chuan)感(gan)器(qi)時(shi)(shi),接(jie)右邊數第一位前小(xiao)(xiao)(xiao)數點(dian),傳(chuan)感(gan)器(qi)量(liang)程在200ks至(zhi)2000kg之間(jian)時(shi)(shi),小(xiao)(xiao)(xiao)數點(dian)全不亮,最小(xiao)(xiao)(xiao)分辨率為1kg。

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