Ƙa'idar aiki da wuraren shigarwa na juyawa radar
Cikakken sunan radar mai juyawa shine "reversing anti-collision radar", wanda kuma ake kira "parking auxiliary device", ko "reversing computer warning system". Na'urar za ta iya yin hukunci da nisa na cikas kuma ta ba da shawarar halin da ake ciki na cikas a kusa da abin hawa don inganta amincin juyawa.
Na farko, ƙa'idar aiki
Reversing radar ne wani filin ajiye motoci aminci na'urar, wanda ya hada da ultrasonic firikwensin (wanda aka fi sani da bincike), mai sarrafawa da nuni, ƙararrawa (ƙaho ko buzzer) da sauran sassa, kamar yadda aka nuna a cikin Hoto 1. Ultrasonic firikwensin shine ainihin bangaren na tsarin juyawa gaba daya. Ayyukansa shine aikawa da karɓar raƙuman ruwa na ultrasonic. Ana nuna tsarin sa a hoto na 2. A halin yanzu, aikin binciken da aka saba amfani dashi na 40kHz, 48kHz da 58kHz iri uku. Gabaɗaya magana, mafi girman mitar, mafi girman hankali, amma a kwance da madaidaiciyar shugabanci na kusurwar ganowa ya fi karami, don haka gabaɗaya amfani da bincike na 40kHz
Astern radar yana ɗaukar ka'idar jeri na ultrasonic. Lokacin da aka sanya abin hawa a cikin jujjuya kayan aiki, radar mai jujjuyawa yana shiga yanayin aiki ta atomatik. Ƙarƙashin kulawar mai sarrafawa, binciken da aka sanya a kan baya na baya yana aika raƙuman ruwa na ultrasonic kuma yana haifar da sigina na amsawa lokacin da aka ci karo da cikas. Bayan karɓar siginar amsawa daga firikwensin, mai sarrafawa yana aiwatar da sarrafa bayanai, don haka ƙididdige nisa tsakanin jikin abin hawa da cikas da yin hukunci da matsayin cikas.
Juya zane-zane na toshe abubuwan haɗin radar kamar yadda aka nuna a cikin adadi na 3, MCU (MicroprocessorControlUint) ta hanyar ƙirar shirin da aka tsara, sarrafa da'irar watsa wutar lantarki ta analog mai dacewa, na'urori masu auna firikwensin ultrasonic suna aiki. Ana sarrafa siginar echo na Ultrasonic ta hanyar karɓa ta musamman, tacewa da haɓaka da'irori, sannan tashoshin 10 na MCU sun gano su. Lokacin karɓar siginar cikakken ɓangaren firikwensin, tsarin yana samun nisa mafi kusa ta hanyar takamaiman algorithm, kuma yana fitar da buzzer ko da'irar nuni don tunatar da direban tazarar cikas mafi kusa da azimuth.
Babban aikin tsarin radar na jujjuya shi ne don taimakawa filin ajiye motoci, fita daga kayan baya ko dakatar da aiki lokacin da motsin dangi ya wuce wani gudun (yawanci 5km / h).
[Tip] Ultrasonic igiyar ruwa yana nufin kalaman sauti wanda ya wuce kewayon ji na ɗan adam (sama da 20kHz). Yana da halaye na babban mitar, yaɗa layin madaidaiciya, madaidaiciyar madaidaiciyar madaidaiciya, ƙaramin diffraction, ƙarfi mai ƙarfi, saurin yaduwar jinkirin (kimanin 340m / s) da sauransu. Raƙuman ruwa na Ultrasonic suna tafiya ta cikin daskararrun daskararru kuma suna iya shiga zurfin dubun mita. Lokacin da ultrasonic ya sadu da ƙazanta ko musaya, zai haifar da raƙuman ruwa masu haske, waɗanda za a iya amfani da su don samar da zurfin ganowa ko jeri, don haka za'a iya sanya shi cikin tsarin jeri.
