Ua haujlwm txoj haujlwm ntawm ionization sensor:
Hauv qhov ntsuas ntawm ionization hom pa luam yeeb, tus nqi me me ntawm active cov tshuaj kua hluav taws xob (am241) yog nruab nrab ntawm ob daim phiaj. Raws li kev cuam tshuam ntawm α particles, huab cua ua rau ionization thiab ua rau muaj ntau qhov cov pov thawj zoo ions thiab hluav taws xob. Thaum qee qhov ntsuas hluav taws xob tau thov nyob rau ob qhov kawg ntawm ionization chamber, qhov zoo thiab qhov tsis zoo ions hauv huab cua txav mus rau ntawm cov hluav taws xob rov qab los ua ib qho tam sim no. Thaum haus luam yeeb nkag mus rau hauv chav ionization, Yog hais tias qhov ib txwm txav ntawm cov khoom hluav taws xob tsis sib haum, lub siab tam sim no yuav hloov pauv. Lub tshuab hluav taws xob txheeb xyuas lub zog ntawm cov teeb liab hluav taws xob ntawm qhov hloov pauv, thiab thaum hloov pauv mus txog lub tswb taw tes, lub tswb yuav nkag mus rau lub xeev lub tswb nrov.
Ntsiab cai ntawm photoelectric pa luam yeeb sensor:
Photoelectric pa luam yeeb lub teeb tsa muaj li ntawm cov duab tshav teeb ci ci, duab tshav ua kua raj infrared thiab chav tsaus. Thaum tsis muaj pa taws, lub teeb ntawm infrared lub teeb ua hluav taws xob tsis tuaj yeem ncav mus txog infrared lub teeb pom kev zoo siab. Thaum muaj cov pa taws nkag mus rau hauv chav tsaus nti, cov pa taws me me no ua rau lub teeb tawm ntawm cov duab hluav taws xob ua rau muaj hluav taws xob tawg ua rau tawg, uas ua rau ib feem ntawm lub teeb tau txais los ntawm infrared sensor raj thiab hloov mus rau hluav taws xob teeb liab. Lub tshuab hluav taws xob txheeb xyuas lub zog hluav taws xob, thiab thaum lub tswb taw tes tau, lub tswb nkag mus rau lub xeev nrov.
Nws muaj ob hom kev tiv thaiv hluav taws ua ntej:
Smoldering hom
Cov pa taws hluav taws tsis tsim kom muaj nplaim taws, lawv tsim cov pa taws loj dua (3 txog 5 microns), cov hluav taws kub taws muaj cov pa taws uas tau qeeb qeeb thiab ua pa taws. Vim tias cov hluav taws no hlawv qeeb heev thiab cov pa hluav taws txawv heev, cov pa taws no muaj sij hawm ntau txaus los sib txuas ua ke thiab sib xyaw, ib yam li cov pa taws loj tuaj. Ua li no, cov pa taws ua kom loj dua yuav loj dua. Cov pa taws loj dua muaj qhov sib txawv ntawm qhov pom kev, yog li cov cuab yeej siv hluav taws xob photoelectric thiaj li siv los tshawb cov hluav taws kub no.
Qhib hom hluav taws
Cov pa hluav taws (qhib cov nplaim taws) muaj nyob hauv txhua qhov hluav taws kub, thiab tsim cov hluav taws ntau ntawm cov pa hluav taws me me (uas yuav muaj kev tiv thaiv tsis zoo ions). Cov lus no muaj tsawg heev, (0.5-3 microns), uas pom tsis yooj yim rau tib neeg lub qhov muag. Piv txwv li, cov pa taws uas tsim los ntawm kev tsim cov pa roj no yog cov pa luam yeeb no. Kev pom ntawm qhib hluav taws (ceev ceev hlawv hluav taws) siv cov ion hom pa hluav taws muaj lub zog zoo dua.