Ubushushu beCummins kunye noxinzelelo lwenzwa yoxinzelelo lwe-alarm switch 4921479

Ngaphandle koqhagamshelwano

Izinto zayo ezibuthathaka azidibanisi nento elinganisiweyo, ebizwa ngokuba sisixhobo sokulinganisa ubushushu esingadibananga. Esi sixhobo singasetyenziselwa ukulinganisa ubushushu bomhlaba bezinto ezihambayo, iithagethi ezincinci kunye nezinto ezinomthamo omncinci wokushisa okanye utshintsho olukhawulezayo lweqondo lokushisa (oludlulayo), kwaye lunokusetyenziswa ukulinganisa ukuhanjiswa kweqondo lokushisa kwintsimi yeqondo lokushisa.

Eyona thermometer isetyenziswayo engadibananga isekelwe kumthetho osisiseko wemitha ye-blackbody radiation kwaye ibizwa ngokuba yithemometha yemitha. I-radiation thermometry ibandakanya indlela yokukhanya (jonga ipyrometer optical), indlela yeradiation (jonga i-radiation pyrometer) kunye nendlela ye-colorimetric (jonga i-colorimetric thermometer). Zonke iintlobo zeendlela ze-radiation thermometry zinokulinganisa kuphela ubushushu obuhambelanayo befotometric, ubushushu bemitha okanye ubushushu bemibala. Kuphela liqondo lobushushu elilinganiswa kumntu omnyama (into efunxa yonke imitha kodwa ingabonakalisi kukhanya) bubushushu bokwenyani. Ukuba ufuna ukulinganisa ubushushu bokwenyani bento, kufuneka ulungise ukukhutshwa komphezulu wemathiriyeli. Nangona kunjalo, ukukhutshwa komphezulu wezinto eziphathekayo akuxhomekanga kuphela kwiqondo lokushisa kunye ne-wavelength, kodwa kunye nomgangatho womphezulu, iingubo kunye ne-microstructure, ngoko kunzima ukulinganisa ngokuchanekileyo. Kwimveliso ezenzekelayo, kudla ngokuba yimfuneko ukusebenzisa i-radiation thermometry ukulinganisa okanye ukulawula ubushushu bomphezulu bezinye izinto, ezifana nobushushu obuqengqelekayo bentsimbi, ubushushu bomqulu, iqondo lobushushu lokubumba kunye nobushushu besinyithi esinyibilikisiweyo esahlukeneyo okanye kwiziko lokunyibilikisa. Kwezi meko zikhethekileyo, kunzima kakhulu ukulinganisa ukukhutshwa komphezulu wento. Ukulinganisa okuzenzekelayo kunye nokulawulwa kweqondo lokushisa eliqinileyo, i-reflector eyongezelelweyo ingasetyenziselwa ukwenza i-blackbody cavity kunye nomhlaba olinganisiweyo. Impembelelo yemitha eyongezelelweyo inokuphucula i-radiation esebenzayo kunye ne-coefficient yokukhutshwa okusebenzayo kwendawo elinganisiweyo. Ukusebenzisa i-coefficient emission emission, iqondo lokushisa elilinganisiweyo lilungiswa ngesixhobo, kwaye ekugqibeleni ukushisa kwangempela kwendawo elinganisiweyo kunokufumaneka. Esona sibuko esongezelelweyo esiqhelekileyo sisibuko esine-hemispherical. Ukusasazwa kwemitha yendawo elinganisiweyo kufutshane nombindi webhola kunokubonakaliswa umva kumphezulu sisipili esikwi-hemispherical ukwenza imitha eyongezelelweyo, ngaloo ndlela kuphuculwe i-coefficient yokukhutshwa okusebenzayo, apho u-ε ikukukhupha komphezulu wesixhobo kunye no-ρ kukubonakalisa ukukhanya. yesipili. Ngokubhekiselele kumlinganiselo wemitha yobushushu bokwenyani begesi kunye nemithombo yeendaba elulwelo, indlela yokufaka ityhubhu yezinto ezikwazi ukumelana nobushushu kubunzulu obuthile ukwenza umgodi omnyama ingasetyenziswa. I-coefficient esebenzayo yokukhutshwa kwe-cylindrical cavity emva kokulingana kwe-thermal kunye ne-medium ifunyenwe ngokubala. Kumlinganiselo ozenzekelayo kunye nokulawula, eli xabiso lingasetyenziselwa ukulungisa umlinganiselo ophantsi wobushushu obuphantsi (oko kukuthi, ubushushu obuphakathi) kwaye ufumane ubushushu bokwenene bendawo.

Izinto eziluncedo zomlinganiselo wobushushu ongadibananga:

Umda ophezulu wokulinganisa awukhawulelwanga ukunyamezela kweqondo lokushisa kwezinto zokuvalelwa kweqondo lokushisa, ngoko ke akukho mda kwiqondo lokushisa eliphezulu elinokulinganiswa ngokomgaqo. Kubushushu obuphezulu obungaphezulu kwe-1800℃, indlela yokulinganisa iqondo lobushushu engadibananga isetyenziswa ikakhulu. Ngophuhliso lwetekhnoloji ye-infrared, umlinganiselo wobushushu bemitha uye wanda ngokuthe ngcembe ukusuka ekukhanyeni okubonakalayo ukuya ekukhanyeni kwe-infrared, kwaye isetyenziswe ngaphantsi kwe-700 ℃ ukuya kwiqondo lobushushu begumbi elinesisombululo esiphezulu.