Umgaqo wokusebenza kunye neendawo zokufaka i-radar ebuyela umva
Igama elipheleleyo le-reversering radar yi-"reverser anti-collision radar", ekwabizwa ngokuba yi-"parking assistant device", okanye "reversering computer warning system". Esi sixhobo sinokujonga umgama wemiqobo size sicebise imeko yemiqobo ejikeleze isithuthi ukuphucula ukhuseleko lokubuyela umva.
Okokuqala, umgaqo wokusebenza
I-radar yokubuyisela umva sisixhobo esincedisayo sokhuseleko lokupaka, esakhiwe yi-sensor ye-ultrasonic (eyaziwa ngokuba yi-probe), isilawuli kunye nomboniso, i-alamu (i-horn okanye i-buzzer) kunye nezinye iindawo, njengoko kubonisiwe kuMfanekiso 1. I-sensor ye-ultrasonic yinxalenye ephambili yenkqubo yokubuyisela umva yonke. Umsebenzi wayo kukuthumela nokufumana amaza e-ultrasonic. Ulwakhiwo lwayo luboniswe kuMfanekiso 2. Okwangoku, i-probe esebenzayo eqhelekileyo ye-40kHz, 48kHz kunye ne-58kHz iintlobo ezintathu. Ngokubanzi, okukhona i-frequency iphezulu, kokukhona uvakalelo luphezulu, kodwa ulwalathiso oluthe tye noluthe nkqo lwe-Angle yokubona incinci, ngoko ke ngokubanzi sebenzisa i-probe ye-40kHz.
I-Astern radar isebenzisa umgaqo wokulinganisa i-ultrasonic. Xa imoto ifakwa kwigiya ebuyela umva, i-reverse radar ingena ngokuzenzekelayo kwimeko yokusebenza. Phantsi kolawulo lomlawuli, iprobe efakwe kwi-bumper engasemva ithumela amaza e-ultrasonic kwaye ivelise imiqondiso ye-echo xa idibana nemiqobo. Emva kokufumana imiqondiso ye-echo evela kwi-sensor, umlawuli wenza ukucubungula idatha, ngaloo ndlela ebala umgama phakathi komzimba wesithuthi kunye nemiqobo kwaye egweba indawo yezithintelo.
Ukuguqula umzobo webhloko yokwakheka kwesekethe yeradar njengoko kubonisiwe kumfanekiso 3, i-MCU (MicroprocessorControlUint) ngoyilo lwenkqubo olucwangcisiweyo, lawula isekethe yokudlulisa i-analog switch drive ehambelanayo, ii-sensors ze-ultrasonic ziyasebenza. Imiqondiso ye-echo ye-Ultrasonic icutshungulwa ngokwamkela okukhethekileyo, ukucoca kunye nokukhulisa iisekethe, ize ifunyanwe zii-ports ezili-10 ze-MCU. Xa ifumana isignali yenxalenye epheleleyo yesensor, inkqubo ifumana umgama okufutshane nge-algorithm ethile, kwaye iqhuba i-buzzer okanye isekethe yokubonisa ukukhumbuza umqhubi ngomgama okufutshane we-obstant kunye ne-azimuth.
Umsebenzi ophambili wenkqubo yeradar yokubuyisela umva kukuncedisa ukupaka, ukuphuma kwigiya ebuyela umva okanye ukuyeka ukusebenza xa isantya sokuhamba sidlula isantya esithile (ngesiqhelo yi-5km/h).
[Icebiso] I-Ultrasonic wave ibhekisa kwizandi ezidlula umgama wokuva kwabantu (ngaphezulu kwe-20kHz). Ineempawu zokuphindaphindeka okuphezulu, ukusasazeka komgca othe tye, ukuqondiswa kakuhle, ukusasazeka okuncinci, ukungena ngamandla, isantya sokusasazeka kancinci (malunga ne-340m/s) njalo njalo. Amaza e-Ultrasonic ahamba kwizinto eziqinileyo ezingacacanga kwaye anokungena kubunzulu beemitha ezingamashumi. Xa i-ultrasonic idibana nokungcola okanye i-interfaces, iya kuvelisa amaza abonakalisiweyo, anokusetyenziselwa ukwenza ukufunyanwa kobunzulu okanye ukurhangqa, kwaye ngaloo ndlela angenziwa inkqubo yokurhangqa.
