Te kaupapa mahi me ngā wāhi tāutanga o te radar whakamuri
Ko te ingoa katoa o te radar whakamuri ko "radar ārai-tuki whakamuri", e kiia ana hoki ko "taputapu āwhina waka", ko "pūnaha whakatūpato rorohiko whakamuri" rānei. Ka taea e te taputapu te aromatawai i te tawhiti o ngā arai me te tohutohu i te āhua o ngā arai e karapoti ana i te waka hei whakapai ake i te haumaru o te whakamuri.
Tuatahi, te kaupapa mahi
Ko te radar whakahuri he taputapu āwhina haumaru waka, he mea tito mai i te pūoko ultrasonic (e mōhiotia whānuitia ana ko te tirotiro), te kaiwhakahaere me te whakaaturanga, te whakaoho (te haona, te buzzer rānei) me ētahi atu wāhanga, e whakaaturia ana i te Pikitia 1. Ko te pūoko ultrasonic te wāhanga matua o te pūnaha whakahuri katoa. Ko tana mahi he tuku me te whiwhi i ngā ngaru ultrasonic. Ko tōna hanganga e whakaaturia ana i te Pikitia 2. I tēnei wā, ko te auau mahi tirotiro e whakamahia whānuitia ana ko te 40kHz, 48kHz me te 58kHz e toru ngā momo. I te nuinga o te wā, ko te teitei ake o te auau, ko te teitei ake o te aro, engari ko te ahunga whakapae me te poutū o te koki kitenga he iti ake, nō reira ko te nuinga o te wā ka whakamahia te tirotiro 40kHz.
Ka whakamahia e te radar Astern te mātāpono o te oro-oro. Ina whakahokia te waka ki te taputapu whakamuri, ka uru aunoa te radar whakamuri ki te āhua mahi. I raro i te mana whakahaere o te kaiwhakahaere, ka tukuna e te tirotiro i runga i te parepare o muri ngā ngaru oro-oro, ā, ka whakaputa tohu whakaata ina tūtaki ki ngā arai. I muri i te whiwhinga o ngā tohu whakaata mai i te pūoko, ka tukatukahia e te kaiwhakahaere ngā raraunga, ā, ka tatau i te tawhiti i waenga i te tinana o te waka me ngā arai, ka aromatawai i te tūranga o ngā arai.
Ko te hoahoa poraka hanganga ara iahiko radar whakahurihuri e whakaaturia ana i te ahua 3, MCU (MicroprocessorControlUint) mā te hoahoa hōtaka kua whakaritea, ka whakahaere i te ara iahiko tuku pana hiko anarau e rite ana, ka mahi ngā pūoko ultrasonic. Ka tukatukahia ngā tohu whakaata ultrasonic mā ngā ara iahiko whiwhi, tātari me te whakanui motuhake, kātahi ka kitea e ngā tauranga 10 o te MCU. Ina whiwhihia te tohu o te wāhanga katoa o te pūoko, ka whiwhi te pūnaha i te tawhiti tata mā te raupaparorohiko motuhake, ka peia te buzzer, te ara iahiko whakaatu rānei hei whakamahara i te taraiwa mō te tawhiti arai tata me te azimuth.
Ko te mahi matua a te pūnaha radar whakamuri he āwhina i te tūnga waka, te puta i te taputapu whakamuri, te mutu rānei o te mahi ina neke ake te tere neke whanaunga i tētahi tere (ko te tikanga he 5km/h).
[Tohutohu] Ko te ngaru oroorooro e pā ana ki te ngaru orooro e nui ake ana i te whānuitanga o te whakarongo a te tangata (neke atu i te 20kHz). He āhuatanga ōna orooro auau teitei, te horapa rārangi tika, te ahunga pai, te iti o te diffraction, te kaha o te urunga, te tere horapa puhoi (tata ki te 340m/s) me ētahi atu. Ka haere ngā ngaru orooroorooro i roto i ngā totoka matapōkere, ā, ka taea te uru ki te hohonutanga o ngā tekau mita. Ina tūtaki te orooroorooro ki ngā poke, ki ngā atanga rānei, ka puta he ngaru whakaata, ka taea te whakamahi hei hanga i te kitenga hohonu, te whānuitanga rānei, ā, nō reira ka taea te hanga hei pūnaha whānuitanga.
