Thaum cov khoom kuaj pom dhau ntawm lub qhov, lub teeb raug thaiv, lub pob hluav taws xob photoelectric yuav ua, thiab lub teeb liab tswj hluav taws xob yuav tsim tawm kom txiav tawm lossis tig rau hauv lub thauj khoom tam sim no, yog li ua tiav ib qho kev tswj hwm.
Cov khoom xa tawm yog ua kom lub hom phiaj los tsim lub teeb ci, thiab cov hluav taws xob tso tawm feem ntau yog los ntawm lub tshuab hluav taws xob (semiconductor light source), lub teeb ci ntsa iab (LED), laser diode, thiab infrared emitting diode. Cov nqaj tau tawm txuas ntxiv mus, lossis qhov dav ntawm cov mem tes yog hloov. Cov khoom tau txais yog suav nrog photodiodes, phototransistors, thiab thaij duab thaij duab. Nyob rau hauv pem hauv ntej ntawm lub txais, kho qhov muag xws li lub lens thiab aperture tau ntsia. Qab nws yog Circuit Court nrhiav, uas tuaj yeem lim tawm cov teeb liab muaj txiaj ntsig thiab siv cov teeb liab.
Lub teeb pom kev zoo tuaj yeem tawm cov duab teeb ci pom kev lossis pom kev ua kom pom, thiab tus txais lub teeb tuaj yeem txais lub teeb uas tsis muaj kev thaiv.
Qhov ntev:
Cim npe nrov: slot hom photoelectric sensor, Tuam Tshoj, tuam ntxhab, lub Hoobkas, yuav, nqi, pheej yig
