Cov nyhuv hauv kev tshawb nrhiav
Cov nyhuv huv yog ib hom kev siv electromagnetic. Qhov tshwm sim no tau pom los ntawm American Physicist Hall (EH Hall, 1855-1938) hauv xyoo 1879 thaum kawm txog kev siv hluav taws xob hlau. [1] Thaum lub sijhawm tam sim no mus rau sab nraud sab nraud ntawm sab nraud ntawm lub semiconductor, cov nqa khoom yog deflected, thiab ib qho hluav taws xob ntxiv yog tsim los ntawm kev cob qhia txog qhov tam sim no thiab qhov sib txawv ntawm qhov chaw, qhov no ua rau muaj qhov sib txawv ntawm lub semiconductor. Qhov no phenomenon yog cov nyhuv Hall. Qhov txawv txav kuj tseem raug xa mus ua Hall Hall qhov txawv. Cov nyhuv hauv kev txiav txim siab yog txiav txim siab siv txoj cai tswj kav.
Cov nyhuv hauv qhov pom tau los ntawm Physicist Hall hauv 1879. Nws piav txog kev sib raug zoo ntawm qhov sib txawv ntawm qhov chaw thiab lub qhov hluav taws xob, uas yog qhov txawv ntawm cov tswb hluav taws xob. Thaum ib tus neeg tau hla dhau ntawm tus neeg xyuas pib hauv ib qho chaw hauv kev sib nqus, qhov sib txawv ntawm qhov chaw ua rau lub zog ntawm kev siv hluav taws xob los ntawm cov neeg siv hluav taws xob, tsim kom muaj kev sib txawv ntawm ob qho tib si rau tus neeg xyuas neeg thiab qhov sib nqus ntawm txoj kab sib luag.
Txawm hais tias qhov teebmeem no tau raug paub thiab to taub ntau xyoo dhau los, Cov nqaij tsis muaj raws li cov tswv yim tseem tsis tau txog thaum kev loj hlob ntawm cov khoom siv, kom txog thaum siv cov hlau nplaum thiab qhov teebmeem teebmeem khiav lag luam ntawm cov khoom me me. Nyob ntawm tus qauv tsim thiab kev tsim kho, Kev siv cov nyhuv cov cuab yeej siv tau los siv rau / tawm ntawm cov sensors lossis linear sensors hauv lub tshuab fais fab.