1. Yintoni imitha yenqanaba leradar? Zithini iimpawu zayo?
Imitha yenqanaba leradar luhlobo lwesixhobo esikhupha ii-microwave nge-antenna ukuya kwinqanaba eliphakathi elilinganisiweyo, size sibale inqanaba lolwelo ngaphakathi kwisikhongozeli ngokusekwe kwixesha elithathayo ukuze ii-microwave zikhutshwe kwaye zibuyiselwe umva.
Iimbonakalo:
① Akukho kufuduswa, akukho zinto zokudlulisa, akukho kulinganiswa kokuthintana, akuthintelwanga bubushushu, uxinzelelo, umphunga, ii-aerosols okanye uthuli. Ifanelekile ukulinganiswa kwe-viscous medium, i-toxic okanye i-non-toxic sanitary medium, kunye ne-corrosive medium.
②Imitha yenqanaba leradar ayinayo indawo engabonakaliyo yokulinganisa kwaye ukuchaneka kwayo (isisombululo) kunokuba phezulu kakhulu. Impazamo yokulinganisa yenqanaba lolwelo ingaba phezulu njenge-1mm (kunye neemodeli ezikhethekileyo ezifikelela kwi-0.1mm). Ke ngoko, ingasetyenziswa njengesixhobo sokulinganisa sorhwebo.
2. Yintoni umgaqo wokulinganisa imitha yenqanaba leradar?
Imitha yenqanaba leradar isebenzisa i-oscillator ephindaphindayo ephezulu njengejenereyitha ye-microwave. I-microwave eveliswa yijenereyitha ikhokelwa kwi-antenna yemitha nge-waveguide ize ikhutshwe iye ezantsi. Xa i-microwave idibana nomqobo, njengomphezulu wolwelo, olunye lwalo luyafunxwa kwaye olunye lubuyiselwa umva. Inqanaba lolwelo lilinganiswa ngokulinganisa ubudlelwane phakathi kweeparamitha ezithile zegagasi elidlulisiweyo kunye negagasi elibonakalisiweyo ukusuka kwinqanaba lolwelo.
Okwangoku, kukho iintlobo ezimbini eziphambili zeemitha zezinga le-radar. Uhlobo olunye lune-frequency emission esisigxina kwaye lulinganisa ixesha lokuhamba kwegagasi elikhutshiweyo kunye negagasi elibonakalisiweyo. Emva koko, ngeprosesa yesignali ekrelekrele, ibala ukuphakama kwenqanaba lolwelo elilinganisiweyo. Ubudlelwane phakathi kwexesha lokusebenza kolu hlobo lwegauge yezinga le-radar kunye nomgama ukusuka kwinqanaba lolwelo ngulo: t = 2d/c.
c - Isantya sokusasazwa kwamaza e-electromagnetic, c = 300000 km/s;
d - Umgama ophakathi kwenqanaba eliphakathi elilinganisiweyo kunye neprobe, ngeemitha;
t - Ixesha eliqala xa iprobe ikhupha amaza e-electromagnetic de ifumane amaza e-electromagnetic abonakalisiweyo, S.
Olunye uhlobo lulinganisa umahluko wefrikhwensi phakathi kwe-wave ekhutshwayo kunye ne-wave ebonakalisiweyo, kwaye luguqula lo mahluko wefrikhwensi ube yisignali yombane ehambelana nenqanaba lolwelo elilinganisiweyo. Ifrikhwensi yokukhupha yolu hlobo lwe-liquid level gauge ayilo-frequency esisigxina kodwa yifrikhwensi ehlengahlengiswayo rhoqo ye-amplitude.
Ixesha leposi: Disemba-03-2025