Radar

Cov ntaub ntawv xwm txheej qhia tau tias ntau dua 76% ntawm cov xwm txheej tshwm sim los ntawm tib neeg kev ua yuam kev;thiab hauv 94% ntawm cov xwm txheej, tib neeg yuam kev suav nrog.ADAS (Advanced Driver Assistance Systems) yog nruab nrog ntau lub radar sensors, uas tuaj yeem txhawb nqa tag nrho cov haujlwm ntawm kev tsav tsheb tsis muaj neeg siv.Tau kawg, nws yog qhov yuav tsum tau piav qhia ntawm no, RADAR hu ua Radio Detection And Ranging, uas siv xov tooj cua nthwv dej los ntes thiab nrhiav cov khoom.

Cov tshuab radar tam sim no feem ntau siv 24 GHz lossis 77 GHz ua haujlwm zaus.Qhov kom zoo dua ntawm 77GHz yog nyob rau hauv nws qhov tseeb dua ntawm qhov sib txawv thiab kev ntsuas ceev, kev daws teeb meem zoo dua kab rov tav, thiab lub kav hlau txais xov me me, thiab muaj teeb meem tsawg dua.

Cov radars luv luv feem ntau yog siv los hloov cov ultrasonic sensors thiab txhawb kev tsav tsheb ntau dua.Txog rau qhov kawg no, cov sensors yuav raug ntsia rau hauv txhua lub ces kaum ntawm lub tsheb, thiab lub sensor rau pem hauv ntej kom pom qhov ntev yuav raug ntsia rau pem hauv ntej ntawm lub tsheb.Nyob rau hauv 360 ° tag nrho cov kev pab cuam radar system ntawm lub tsheb lub cev, ntxiv sensors yuav raug ntsia nyob rau hauv nruab nrab ntawm ob sab ntawm lub tsheb lub cev.

Qhov zoo tshaj plaws, cov radar sensors yuav siv 79GHz zaus band thiab 4Ghz kis tau tus mob bandwidth.Txawm li cas los xij, lub ntiaj teb teeb liab zaus kis tus qauv tam sim no tsuas yog tso cai 1GHz bandwidth hauv 77GHz channel.Niaj hnub no, lub ntsiab txhais ntawm radar MMIC (monolithic microwave integrated circuit) yog "3 transmitting channels (TX) thiab 4 receiver channels (RX) integrated on a single circuit".

Ib qho kev pabcuam tsav tsheb uas tuaj yeem lav L3 thiab siab dua kev tsav tsheb tsis muaj neeg tsav tsheb yuav tsum muaj tsawg kawg peb lub tshuab sensor: lub koob yees duab, radar thiab laser ntes.Yuav tsum muaj ob peb lub sensors ntawm txhua yam, faib rau hauv ntau txoj haujlwm ntawm lub tsheb, thiab ua haujlwm ua ke.Txawm hais tias qhov yuav tsum tau siv tshuab semiconductor thiab lub koob yees duab thiab radar sensor kev txhim kho thev naus laus zis tam sim no muaj, kev txhim kho ntawm lidar systems tseem yog qhov kev sib tw loj tshaj plaws thiab tsis ruaj khov ntawm cov teeb meem kev lag luam thiab kev lag luam.