Qhov sib txawv ntawm pir sensor thiab ir sensor
PIR feem ntau yog hais txog baiP (lub zog dhau mus dhau) passive, vim tias nws tsuas tau txais infrared du passively thiab tsis nquag tshaj tawm cov hluav taws xob, yog li nws muaj nqi qis, kev siv hluav taws xob tsawg thiab qhov loj me me. Hauv PIR, feem ntau muaj 2 ntes kuaj txuas nrog hauv thim rov qab (tseem muaj 4 rau kev tshaj lij ntxiv, tsis tshua pom tshwm). Thaum tus kwv tseem nyob lossis tsis muaj khoom, lub tswv yim ntawm ob qhov kev tshawb nrhiav kom zoo ib yam, qhov polarity thim rov qab, thiab qhov hluav taws xob tshem tawm; thaum tus kwv hla dhau, teeb liab teeb liab mloog los ntawm ob qhov kev tshawb pom cov khoom tsis sib npaug, thiab qhov hluav taws xob tsis sib xws yog tsim, thiab nws tau txiav txim siab tias ib qho khoom tau dhau los. Tab sis vim tias qhov no, nws txoj kev kuaj pom muaj tsawg, thiab nws tsuas yog pom qhov txav ntawm cov khoom (cov khoom uas txawv txav ntawm qhov ntsuas tom qab ntawm ib puag ncig, feem ntau PIRs xav tau tias qhov khoom kub tsawg kawg yog 4-8 ° C siab dua qhov ib puag ncig), tab sis yog tias qhov khoom tseem, qhov kev kuaj pom tsis tuaj txog. Yog tias koj tau pom qee cov ntaub ntawv hais txog cov nab ua ntej, koj yuav tsum paub tias lub ntiaj teb hauv qhov muag ntawm nab yog zoo li PIR. Piv txwv li, qav, yog tias nws tsiv, tus nab yuav pom nws; thaum nws yog nyob ruaj ruaj, nws zoo nkaus li nco dheev.
IR sensor yog lub cev tsis xws li infrared sensor, lub ntsuas cua kub siv rau hauv tub rog, txawm hais tias qhov khoom (uas tseem yuav tsum tau sib txawv ntawm qhov ntsuas huab cua tom qab) tsis txav, nws tseem tuaj yeem kuaj pom vim qhov txawv qhov kub. Piv nrog cov txiaj ntsig ntawm PIR, nws tuaj yeem raug kuaj pom hauv lub sijhawm, thiab lub algorithm tuaj yeem txiav txim siab txog hom khoom, kev txav chaw, thiab lwm yam. Qhov tsis zoo yog qhov loj me, tus nqi siab, lub zog siv hluav taws xob zoo (piv rau PIRs), thiab ntau yam yuav tsum tau them sai sai rau qhov txias thiab cua txias (ntau nyob rau hauv xyoo tas los Cov neeg tsim khoom tsim tau ntau yam ntawm lub teeb tsa uas tsis tas yuav tsum txias thiab ua kom sov tawm).