Ko te whakawhitiwhiti kōrero NB‑IoT o te mita wai ultrasonic e whakatinanahia ana i runga i te hoahoa paipa kapua pito-ki-pito. Kei roto i te tukanga katoa e whā ngā taahiraa matua:
1. Te ine i te taha-mutunga me te kohikohi raraunga
Ka whakamahia e te mita wai ultrasonic te tikanga rerekētanga wā (ToF) hei ine i te rere: ka tukuna, ka whiwhi hoki ngā tohu e rua o ngā transducers ultrasonic. Ka tatauhia te tere rere mā te ine i te rerekētanga wā i waenga i te horapa o runga me raro. Ka kohia e te MCU ngā raraunga rere, ka mahi i te whakatikatika pāmahana, ā, ka rongoa ā-rohe.
2. Te urunga whatunga NB‑IoT me te tuku raraunga
Ka whakaohokia te kōwae NB‑IoT kua hangaia (hei tauira, BC95, A7670) e te taima RTC. Ka tīmata te urunga whatunga mā ngā whakahau AT, ka whakaoti i te manatoko a te kaiwhakahaere, ā, ka whakatū hononga. Ka tākaihia ngā raraunga ki tētahi whakatakotoranga paerewa (hei tauira, TLV/Binary) me te ID taputapu, te tohu wā, te rere, me te tūnga pākahiko, kātahi ka tukuna mā te whakamahi i ngā kawa pēnei i a CoAP/MQTT.
3. Te tuku whakamua me te haumarutanga o te paparanga whatunga
Ka haere ngā raraunga mā te teihana turanga NB‑IoT → whatunga matua → tūāpapa IoT (hei tauira, OneNET). Ka tiakina te tukunga e te whakamunatanga DTLS me te manatoko tuakiri taputapu hei ārai i te raweketanga me te whakarongo puku.
4. Taupānga taha-pūhara me te mana whakahaere rua-ara
Ka tātarihia, ka rongoatia hoki ngā raraunga e te tūāpapa ratonga wai, ka taea ai te pānui mamao, te utu, te kimi turuturu, me te whakahaere takirere. Ka taea e te tūāpapa te tuku whakahau (hei tauira, te pānui i ngā tawhā, te whakatuwhera/kati takirere) ki te mita, e whakahaere ana i aua whakahau, ā, ka whakahokia mai ngā hua mā te whatunga NB‑IoT.
Ngā tikanga matua iti-mana:
PSM (Aratau Penapena Hiko): Ka uru ki te moe hōhonu i muri i te tuku, me te iti o te iahiko ki te taumata μA.
eDRX: Ka whakawhānui i te whiwhinga mutu-kore hei whakataurite i te whakaroa me te whakapaunga hiko.
Ko te kaha e pau ana i te hononga whakarunga ia rā he ~18.7 mJ, ā, e 8–10 tau te roa o te ora o te pākahiko.
Wā tuku: 21 Paenga-whāwhā 2026