直線的(de)(de)(de)(de)工(gong)作原(yuan)理是跟滑動變阻(zu)器(qi)一(yi)樣(yang)的(de)(de)(de)(de)，它作為(wei)(wei)分壓(ya)器(qi)使(shi)用(yong)的(de)(de)(de)(de)，它是以(yi)相(xiang)對(dui)的(de)(de)(de)(de)輸出(chu)電(dian)(dian)(dian)(dian)壓(ya)來(lai)呈(cheng)現出(chu)所測(ce)量(liang)位置的(de)(de)(de)(de)實際(ji)上的(de)(de)(de)(de)位置。對(dui)這(zhe)個裝置的(de)(de)(de)(de)工(gong)作有下面幾點要求：1、如果電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)尺(chi)(chi)已經使(shi)用(yong)很(hen)長時(shi)間(jian)了，而且密封已經老化(hua)，同時(shi)夾雜著很(hen)多雜質(zhi)，而且水混合(he)物和油(you)會(hui)嚴重(zhong)影(ying)響電(dian)(dian)(dian)(dian)刷(shua)的(de)(de)(de)(de)接觸(chu)電(dian)(dian)(dian)(dian)阻(zu)的(de)(de)(de)(de)，這(zhe)樣(yang)會(hui)使(shi)顯(xian)(xian)示(shi)的(de)(de)(de)(de)數字不(bu)停(ting)地(di)跳(tiao)動。這(zhe)個時(shi)候可以(yi)說直線位移傳感器(qi)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)尺(chi)(chi)已經損壞了，需要更換。2、若電(dian)(dian)(dian)(dian)源的(de)(de)(de)(de)容量(liang)很(hen)小(xiao)(xiao)，就(jiu)會(hui)出(chu)現很(hen)多情(qing)況的(de)(de)(de)(de)，所以(yi)，供電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)源需要有充(chong)分的(de)(de)(de)(de)容量(liang)。那么，容量(liang)不(bu)足，就(jiu)會(hui)造成(cheng)如下的(de)(de)(de)(de)情(qing)況：熔(rong)膠的(de)(de)(de)(de)運動會(hui)使(shi)合(he)模(mo)電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)尺(chi)(chi)的(de)(de)(de)(de)顯(xian)(xian)示(shi)變換，有波動，或(huo)者合(he)模(mo)的(de)(de)(de)(de)運動會(hui)使(shi)射(she)膠電(dian)(dian)(dian)(dian)子(zi)(zi)(zi)(zi)尺(chi)(chi)的(de)(de)(de)(de)顯(xian)(xian)示(shi)波動，造成(cheng)測(ce)量(liang)結(jie)果誤差很(hen)大。如果電(dian)(dian)(dian)(dian)磁閥的(de)(de)(de)(de)驅動電(dian)(dian)(dian)(dian)源于直線位移傳感器(qi)供電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)源同時(shi)在一(yi)起的(de)(de)(de)(de)時(shi)候，更容易(yi)出(chu)現以(yi)上的(de)(de)(de)(de)情(qing)況，情(qing)況嚴重(zhong)時(shi)用(yong)萬(wan)用(yong)表的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)檔甚至(zhi)可以(yi)測(ce)量(liang)到(dao)電(dian)(dian)(dian)(dian)壓(ya)的(de)(de)(de)(de)有關波動。如果情(qing)況不(bu)是因(yin)為(wei)(wei)高(gao)頻干擾、靜電(dian)(dian)(dian)(dian)干擾或(huo)者是中性(xing)不(bu)夠好(hao)的(de)(de)(de)(de)造成(cheng)的(de)(de)(de)(de)，那么就(jiu)有可能是電(dian)(dian)(dian)(dian)源的(de)(de)(de)(de)功率太(tai)小(xiao)(xiao)造成(cheng)的(de)(de)(de)(de)。