Kwimilinganiselo yamanzi yanamhlanje, iimitha zamanzi ze-ultrasonic kunye neze-electromagnetic zezona teknoloji zimbini ziphambili, ezithatha indawo yeemitha zemveli zoomatshini kumacandelo amaninzi. Nangona zombini zibonelela ngokuchanekileyo okuphezulu kunye neempawu ezikrelekrele, uyilo lwazo olwahlukileyo kunye nemigaqo yokusebenza zizenza zilungele iimfuno ezahlukeneyo. Eli nqaku lithelekisa ezi zimbini ukunceda abasebenzisi bakhethe ukhetho olufanelekileyo.
Imigaqo Ephambili Yokusebenza
Iimitha zamanzi ze-ultrasonic zixhomekeke kumahluko wexesha lokuhamba okanye kwisiphumo se-Doppler. Iimodeli zexesha lokuhamba zithumela imiqondiso ye-ultrasonic ngokuhamba kwamanzi nangaphandle kwawo; umsantsa wexesha phakathi kwezi zibonakaliso ubala isantya sokuhamba kwamanzi. Iimodeli ze-Doppler, ngokwahlukileyo, zibona utshintsho lwemvamisa ukusuka kumaza e-ultrasonic atsiba amasuntswana emanzini, esebenza kakuhle nangona ukuhamba kwamanzi kungazinzile.
Iimitha zamanzi ze-electromagnetic zisebenzisa uMthetho kaFaraday wokungenisa i-Electromagnetic. Zenza intsimi yemagnethi efanayo kumbhobho. Xa amanzi aqhubayo ehamba kule ntsimi, avelisa amandla e-electromotive (EMF) kwii-electrodes—amandla e-EMF anxulumene ngokuthe ngqo nesantya sokuhamba kwamanzi, nto leyo evumela ukulinganiswa okuchanekileyo.
Umahluko oPhambili woKusebenza
Ngokuphathelele ukuchaneka, iimitha ze-electromagnetic zihlala zinomphetho omncinci: uninzi lugcina ukuchaneka kwe-±0.2% ukuya kwi-±0.5% kuzo zonke iindawo zokuhamba, ngelixa iimodeli ze-ultrasonic ziqala kwi-±0.5% (ezorhwebo) ukuya kwi-±0.2% (yemizi-mveliso). Ukuze kube lula ukuhamba, iimitha ze-electromagnetic zibonelela ngomlinganiselo wokujika ukuya kuthi ga kwi-1:1000, zisingatha zombini ukuhamba okuphantsi kakhulu kunye nokuphezulu. Iimitha ze-Ultrasonic zifikelela kwi-1:500, zisenamandla kodwa azinakuguquguquka kakhulu kwiindawo ezihamba kakhulu.
Ukuhambelana kwemidiya kukwahlukana okukhulu. Iimitha ze-Ultrasonic zisebenza ngezinto ezihambisa umbane nezingenazo izinto ezihambisa umbane (umz., amanzi acocekileyo, iikhemikhali), nto leyo ezenza ukuba zilungele amashishini afana namayeza. Iimitha ze-electromagnetic zifuna amanzi anombane ohambisa umbane ≥5 μS/cm — ziyasilela emanzini acocekileyo okanye kwioyile.
Iimfuno zokufakelwa nazo zahlukile. Iimitha ze-ultrasonic zexesha lokuhamba zifuna ububanzi bepayipi obu-5-10 obuthe tye obuphezulu/obusezantsi ukuze kubekho ukuhamba okuzinzileyo, ngelixa iimodeli zeDoppler ziguquguquka ngakumbi. Iimitha ze-electromagnetic zifuna ububanzi obu-3-5 obuthe tye kuphela, kwaye ii-electrode zazo ezifakwe kwi-flush ziphepha ukuphazamiseka kokuhamba.
Iingenelo kunye nokunqongophala
Iimitha ze-Ultrasonic zikhanya ngokuguquguquka kwazo: iinguqulelo ze-clamp-on zifakelwa ngaphandle, akukho mfuneko yokuguqulwa kwemibhobho—zilungele ukulungiswa kwakhona. Zikwanokugcinwa okuncinci, ngaphandle kweendawo ezihambayo ezichukumisa amanzi. Nangona kunjalo, ukuxinana okuphezulu okanye amaqamza omoya kunokuphazamisa ukuchaneka, kwaye iimodeli zezinga lemizi-mveliso zibiza ngaphezulu.
Iimitha ze-electromagnetic ziyaphumelela kwiimeko ezinzima: ii-electrode ezimelana nokugqwala (i-tantalum, i-platinum-iridium) ziphatha amanzi amdaka kunye namanzi ane-sediment ephezulu. Zidibana lula neenkqubo ze-IoT zokujonga ngexesha langempela. Kodwa ukuxhomekeka kwazo ekuqhubeni umbane kuyawuthintela umsebenzi, kwaye uninzi lwazo lufuna amandla angaphandle—alungelanga kangako kwiindawo ezikude.
Iimeko ezifanelekileyo zokusetyenziswa
Iimitha ze-ultrasonic zilungele izakhiwo zokuhlala/zorhwebo (iidayamitha ezincinci, amanzi epompo), iinkqubo zamanzi acocekileyo (amayeza, iilebhu), kunye nokulungisa imibhobho emidala. Zikwalungele imibhobho emikhulu kamasipala okanye yemizi-mveliso.
Iimitha ze-electromagnetic zilungele ulawulo lweenkqubo zoshishino (iikhemikhali, izityalo zamanzi amdaka), ukusasazwa kwamanzi kamasipala (ukufunyanwa kokuvuza), izibonelelo zorhwebo (ukusetyenziswa kwamanzi axutyiweyo), kunye nokunkcenkceshela kwezolimo (amanzi angaphantsi komhlaba aqhubayo).
Isiphelo
Zombini iimitha ziphucukile, kodwa amandla azo akhokela ukhetho. Khetha i-ultrasonic kwimidiya engeyiyo ehambisa umbane okanye i-retrofits; i-electromagnetic ngokuchanekileyo okuphezulu kwimidiya ehambisa umbane okanye iindawo ezinzima. Ukuqonda la mahluko kuqinisekisa ukulinganiswa kwamanzi okufanelekileyo, nokuba kukwi-billing, ulawulo lwemizi-mveliso, okanye ulawulo lukamasipala.
Ixesha lokuthumela: Novemba-12-2025