Ka'idar aiki da wuraren shigarwa na radar mai juyawa
Cikakken sunan radar mai juyawa shine "reversing anti-callision radar", wanda kuma ake kira "parking auxiliary device", ko "reversing computer warning system". Na'urar na iya tantance nisan cikas da kuma ba da shawara kan yanayin cikas da ke kewaye da abin hawa don inganta amincin juyawa.
Da farko, ƙa'idar aiki
Radar mai juyawa na'urar kariya ce ta wurin ajiye motoci, wacce ta ƙunshi na'urar firikwensin ultrasonic (wanda aka fi sani da bincike), mai sarrafawa da nuni, ƙararrawa (ƙaho ko buzzer) da sauran sassa, kamar yadda aka nuna a Hoto na 1. Na'urar firikwensin ultrasonic ita ce babban ɓangaren tsarin juyawa gaba ɗaya. Aikinta shine aika da karɓar raƙuman ultrasonic. Tsarinta an nuna shi a Hoto na 2. A halin yanzu, mitar aiki da ake amfani da ita na 40kHz, 48kHz da 58kHz nau'i uku. Gabaɗaya, mafi girman mitar, mafi girman ƙarfin ji, amma alkiblar kwance da tsaye ta Kusurwar ganowa ƙarami ce, don haka gabaɗaya ana amfani da na'urar 40kHz.
Radar ta Astern ta rungumi ka'idar auna karfin ultrasonic. Idan aka sanya motar a cikin juyi, radar mai juyawa tana shiga yanayin aiki ta atomatik. A karkashin ikon mai sarrafawa, na'urar binciken da aka sanya a kan bamper na baya tana aika raƙuman ultrasonic kuma tana samar da siginar echo lokacin da suka gamu da cikas. Bayan karɓar siginar echo daga firikwensin, mai sarrafawa yana gudanar da sarrafa bayanai, don haka yana ƙididdige nisan da ke tsakanin jikin abin hawa da cikas da kuma tantance matsayin cikas.
Juya zane na tubalan da'irar radar kamar yadda aka nuna a hoto na 3, MCU (MicroprocessorControlUint) ta hanyar tsarin shirin da aka tsara, sarrafa da'irar watsawa ta hanyar amfani da na'urar analog mai dacewa, na'urori masu auna sigina na ultrasonic suna aiki. Ana sarrafa siginar amsawar ultrasonic ta hanyar da'irori na musamman na karɓa, tacewa da ƙara girma, sannan a gano su ta tashoshin MCU guda 10. Lokacin karɓar siginar cikakken ɓangaren firikwensin, tsarin yana samun mafi kusa nesa ta hanyar takamaiman algorithm, kuma yana tuƙa buzzer ko da'irar nuni don tunatar da direban nisan cikas da azimuth mafi kusa.
Babban aikin tsarin radar mai juyawa shine taimakawa wajen ajiye motoci, fita daga kayan juyawa ko dakatar da aiki lokacin da saurin motsi ya wuce wani takamaiman gudu (yawanci 5km/h).
[Shawara] Waƙar Ultrasonic tana nufin waƙar sauti wadda ta wuce kewayon jin ɗan adam (sama da 20kHz). Tana da halaye na mita mai yawa, yaɗa layi madaidaiciya, kyakkyawan tsari, ƙaramin rarrabuwa, shigar ƙarfi, saurin yaɗawa a hankali (kimanin mita 340/s) da sauransu. Waƙar Ultrasonic tana tafiya ta cikin daskararrun abubuwa marasa haske kuma tana iya shiga zurfin mita goma. Lokacin da ultrasonic ya haɗu da ƙazanta ko hanyoyin sadarwa, zai samar da raƙuman ruwa masu haske, waɗanda za a iya amfani da su don ƙirƙirar gano zurfin ko kewayon, don haka za a iya mayar da su tsarin kewayon.
