I roto i te ine rere wai o ēnei rā, ko ngā mita wai ultrasonic me te mita hikohiko ngā hangarau matua e rua, e whakakapi ana i ngā mita mīhini tuku iho i roto i ngā rāngai maha. Ahakoa he tino tika, he atamai hoki ngā āhuatanga e rua, he rerekē ngā hoahoa me ngā mātāpono mahi e pai ai mō ngā hiahia rerekē. Ka whakatauritea e tēnei tuhinga ngā mea e rua hei āwhina i ngā kaiwhakamahi ki te whiriwhiri i te kōwhiringa tika.
Ngā Mātāpono Mahi Matua
Ka whakawhirinaki ngā mita wai ultrasonic ki te rerekētanga wā-haere, ki te pānga Doppler rānei. Ka tukuna e ngā tauira wā-haere ngā tohu ultrasonic me te rere o te wai, me te rere ki te taha; mā te āputa wā i waenganui i ēnei tohu ka tatau i te tere rere. He rerekē, ka kitea e ngā tauira Doppler ngā nekehanga auau mai i ngā ngaru ultrasonic e pekepeke ana i ngā matūriki i roto i te wai, ā, ka pai te mahi ahakoa te rere kore pumau.
Ka whakamahia e ngā mita wai hiko aukume te Ture a Faraday mō te Whakaoho Aukume. Ka hangaia he papa aukume ōrite puta noa i te paipa. Ina rere te wai kawe i roto i tēnei papa, ka puta he kaha hiko (EMF) i roto i ngā irahiko—ka pā tika te kaha EMF ki te tere rere, ka taea ai te ine tika.
Ngā Rerekētanga Matua o te Mahi
Mō te tika, he iti noa te painga o ngā mita hikohiko: ko te nuinga e mau tonu ana te tika o te ±0.2% ki te ±0.5% puta noa i ngā awhe rere, ko ngā tauira ultrasonic ia kei waenga i te ±0.5% (arumoni) ki te ±0.2% (ahumahi). Mō te awhe rere, ka tukuna e ngā mita hikohiko he ōwehenga whakaheke tae atu ki te 1:1000, e whakahaere ana i ngā rere tino iti me te teitei. Ka eke ngā mita ultrasonic ki te 1:500, he kaha tonu engari he iti ake te whakamahinga mō ngā rere tino nui.
He rerekētanga nui te hototahitanga o ngā pāpāho. Ka mahi ngā mita orooro me ngā wai kawe me ngā wai kore-kawe (hei tauira, te wai parakore, ngā matū), ā, he mea tino pai mō ngā ahumahi pēnei i ngā rongoā. Me whakamahi ngā mita hiko aukume i te wai me te kawe ≥5 μS/cm—ka kore e pai mō te wai parakore, te hinu rānei.
He rerekē anō hoki ngā hiahia tāutanga. Me 5–10 ngā diameter paipa tika mō ngā mita ultrasonic wā-haerenga i runga/i raro kia mau ai te rere, engari he ngāwari ake ngā tauira Doppler. Me 3–5 noa iho ngā diameter tika mō ngā mita hiko aukume, ā, ka āraihia e ō rātou irahiko kua whakanohoia ki te taha o te wai te whakararuraru o te rere.
Ngā Painga me ngā Here
He maha ngā whakamahinga o ngā mita orooro: ka taea te tāuta ki waho ngā momo pūmau, kāore he hiahia ki te whakarerekē i ngā paipa—he pai mō ngā whakahoutanga. He iti hoki te tiaki, kāore he wāhanga neke e pā ana ki te wai. Heoi, ka taea e te nui o te paru, te mirumiru hau rānei te whakararu i te tika, ā, he nui ake te utu mō ngā tauira ā-ahumahi.
He tino pai ngā mita hiko aukume i roto i ngā āhuatanga uaua: ka taea e ngā hiko ātete-waikura (tantalum, platinum-iridium) te whakahaere i ngā wai para me te wai paru nui. Ka taea te whakauru atu ki ngā pūnaha IoT mō te aroturuki i te wā tūturu. Engari ko tō rātou whakawhirinaki ki te kawe hiko ka whakawhāiti i te whakamahinga, ā, ko te nuinga e hiahia ana ki te hiko o waho—kāore i te tino pai mō ngā wāhi tūmatanui.
Ngā horopaki tono tino pai
He tino pai ngā mita orooro mō ngā whare noho/whare pakihi (ngā diameter iti, te wai puna), ngā pūnaha wai parakore (ngā rongoā, ngā taiwhanga), me te whakahou i ngā paipa tawhito. He pai hoki mō ngā paipa ā-rohe, ā-ahumahi rānei he diameter nui.
He pai ake ngā mita hiko aukume mō te whakahaere tukanga ahumahi (matū, ngā whare wai para), te tohatoha wai ā-tāone (te kimi turuturu), ngā whare arumoni (te whakamahi wai whakaranu), me te whakamakuku ahuwhenua (te wai whenua e rere ana te wai).
Whakamutunga
He matatau ngā mita e rua, engari ko ō rāua kaha te kaiārahi i te kōwhiringa. Kōwhiria te ultrasonic mō ngā pāpāho kore-arataki, ngā whakahoutanga rānei; te electromagnetic mō te tino tika me ngā pāpāho arataki, ngā taiao kino rānei. Mā te mārama ki ēnei rerekētanga ka tino pai te ine i te wai, ahakoa mō te utu, te whakahaere ahumahi, te whakahaere ā-tāone rānei.
Wā tuku: Whiringa-ā-rangi 12-2025