M'madzi amakonomalo oyezera, ma electromagnetic water meter ndi ma ultrasonic water meter ndi njira ziwiri zodziwika bwino komanso zapamwamba. Mtundu uliwonse uli ndi makhalidwe akeake, omwe amachokera ku mfundo zawo zosiyana zogwirira ntchito. Kumvetsetsa kusiyana kumeneku ndikofunikira kwambiri kuti makampani amadzi, ogwiritsa ntchito mafakitale, ndi ena okhudzidwa apange zisankho zolondola posankha njira yoyenera kwambiri yoyezera madzi pa ntchito zawo.
1. Mfundo Zogwirira Ntchito
Ma electromagnetic water meter amagwira ntchito motsatira lamulo la Faraday la electromagnetic induction. Pamene madzi oyendetsera mpweya, monga madzi, akuyenda kudzera mu magnetic field yomwe imapangidwa mkati mwa meter, mphamvu ya electromotive (EMF) imayambitsidwa. EMF yoyambitsidwa iyi imagwirizana ndi liwiro la madzi oyenda. Meter imayesa EMF iyi pogwiritsa ntchito ma electrodes omwe amaikidwa mbali zosiyana za flow chubu. Poyesa mphamvu ya voltage yoyambitsidwa, liwiro la madzi limatha kudziwika. Popeza dera lodutsa la flow chubu limadziwika, volumetric flow rate ya madzi imatha kuwerengedwa pogwiritsa ntchito fomula
Q=v×A, pomwe Qis ndi liwiro la kuyenda, v ndi liwiro, ndipo A ndi dera lodutsa.
1.2 Mamita a Madzi Opangidwa ndi Ultrasonic
Koma ma ultrasound water meter amagwiritsa ntchito mfundo ya nthawi - ya - kuuluka kwa mafunde a ultrasound mu madzi. Amayesa kusiyana kwa nthawi pakati pa kufalikira kwa zizindikiro za ultrasound m'madzi oyenda. Pamene mafunde a ultrasound alowetsedwa m'madzi, liwiro lake lofalikira limakhudzidwa ndi liwiro la kuyenda kwa madzi. Ngati mafunde atumizidwa kumbali ya kuyenda (pansi), adzayenda mofulumira, ndipo ngati atumizidwa motsutsana ndi kuyenda (kumtunda), adzayenda pang'onopang'ono. Poyesa molondola kusiyana kwa nthawi imeneyi, liwiro la madzi likhoza kuwerengedwa. Mofanana ndi ma electromagnetic water meter, liwiro likadziwika, volumetric flow rate ikhoza kudziwika pochulukitsa liwiro ndi malo odutsa chitoliro kapena njira komwe madzi akuyenda.
2. Makhalidwe Abwino
2.1 Kulondola
2.1.1 Mamita a Madzi a Magetsi
Ma electromagnetic water meter amadziwika ndi kulondola kwawo kwakukulu, makamaka m'magulu apakati mpaka apamwamba. Amatha kufika pamlingo wolondola wa 0.5% kapena kuposa pamenepo m'mikhalidwe yabwino. Kulondola kwakukulu kumeneku kumachitika chifukwa cha mfundo yokhazikika komanso yomveka bwino yokhudza kulowetsedwa kwa ma electromagnetic. Komabe, zinthu monga kusintha kwa mphamvu ya maginito (zomwe zingakhudzidwe ndi magwero akunja a maginito), kuipitsidwa kwa ma electrode, kapena kuyika kosayenera kungakhudze kulondola kwawo. Mwachitsanzo, ngati ma electrode aphimbidwa ndi ma depositi pakapita nthawi, EMF yoyesedwa ikhoza kusokonekera, zomwe zimapangitsa kuti pakhale kuwerengera kolakwika kwa kuchuluka kwa madzi.
Ma ultrasound water meter amaperekanso kulondola kwabwino, nthawi zambiri pakati pa 1% mpaka 2% pa ntchito zonse. Kulondola kwawo kungakhudzidwe ndi zinthu monga kukhalapo kwa thovu la mpweya, zinthu zolimba zopachikidwa, kapena kusintha kwa mphamvu ya mawu m'madzi. Mwachitsanzo, thovu la mpweya limatha kufalitsa mafunde a ultrasound, zomwe zimapangitsa kuti nthawi yoyenda isayende bwino. Mu ntchito zomwe zili ndi madzi oyera komanso momwe madzi amayendera bwino, ma ultrasound water meter amatha kupereka kuwerenga kodalirika komanso kolondola. Mu mitundu ina yapamwamba, njira monga multi-path ultrasound sensing zimagwiritsidwa ntchito kuti ziwongolere kulondola poyesa kuchuluka kwa njira zosiyanasiyana za ultrasound mkati mwa madzi.
2.2 Mtundu wa Mayendedwe
2.2.1 Mamita a Madzi a Magetsi
Ma electromagnetic water meter nthawi zambiri amakhala ndi mtunda wosiyanasiyana, wokhala ndi mtunda wosiyanasiyana (chiŵerengero cha mtunda woposa mtunda wocheperako woyezedwa) cha 100:1 kapena kuposerapo. Ndi oyenera kuyesa ntchito zamafakitale zomwe zimayendera madzi ambiri, monga m'mafakitale akuluakulu oyeretsera madzi kapena makina ozizira amafakitale, komanso ntchito zapakati pa nyumba ndi zamalonda. Komabe, magwiridwe antchito awo pa mtunda wochepa kwambiri amatha kukhala ochepa. Pa liwiro lotsika kwambiri, EMF yomwe imayambitsa ikhoza kukhala yofooka kwambiri kuti isayesedwe molondola, zomwe zimapangitsa kuti pakhale zolakwika zomwe zingachitike kumapeto kwa mtunda woyenda.
2.2.2 Mamita a Madzi Opangidwa ndi Ultrasonic
Ma ultrasound water meter amadziwika ndi luso lawo labwino kwambiri loyezera madzi otsika. Nthawi zambiri amatha kuzindikira kuchuluka kwa madzi oyenda mpaka 0.01 m/s kapena kutsika, zomwe zimapangitsa kuti akhale oyenera kwambiri kugwiritsa ntchito komwe kutayikira pang'ono kapena kugwiritsa ntchito madzi ochepa kuyenera kuyezedwa molondola, monga poyezera madzi m'nyumba kuti azindikire kutuluka kwa madzi. Kuthekera kwawo kukhala kwakukulu, ndipo mitundu ina imapeza chiŵerengero cha 400:1 kapena kuposerapo. Kuchuluka kwa madzi oyenda kumeneku kumawalola kuthana ndi mitundu yosiyanasiyana ya ntchito, kuyambira kugwiritsa ntchito madzi m'nyumba zazing'ono mpaka kuzinthu zazikulu zogawa madzi m'mafakitale ndi m'mizinda.
2.3 Kutaya kwa Kupanikizika
Ma electromagnetic water meter nthawi zambiri amakhala ndi kutayika kochepa kwa mphamvu yamagetsi. Kapangidwe ka chubu choyendera madzi mu ma electromagnetic meter nthawi zambiri kamakhala kowongoka komanso kopanda chopinga, zomwe zimachepetsa kukana kwa madzi. Izi ndizothandiza pakugwiritsa ntchito komwe kusunga madzi othamanga kwambiri ndikofunikira, monga m'mafakitale akuluakulu kapena m'maukonde ogawa madzi pamtunda wautali. Kutayika kochepa kwa mphamvu yamagetsi kumathandiza kuchepetsa kugwiritsa ntchito mphamvu kwa mapampu ndi zida zina zoyendera madzi, chifukwa mphamvu zochepa zimafunika kuti mugonjetse kukana mu mita.
2.3.2 Mamita a Madzi Opangidwa ndi Ultrasonic
Ma ultrasound water meter nthawi zambiri amawonetsanso kutayika kwa mphamvu yotsika. Njira yoyezera mu ultrasound meter sikutanthauza kutsekeka kulikonse mkati mwa njira yoyendera, chifukwa masensa a ultrasound nthawi zambiri amayikidwa kunja kwa chitoliro kapena njira yoyendera. Njira yoyezera yosalowerera iyi imatsimikizira kuti kuyenda kwa madzi sikulepheretsedwa kwambiri, zomwe zimapangitsa kuti kuthamanga kwa madzi kuchepe pang'ono pa mita. Mofanana ndi ma electromagnetic meter, khalidweli limapangitsa ma ultrasound water meter kukhala oyenera kugwiritsidwa ntchito komwe kusunga kuthamanga ndikofunikira.
2.4 Nthawi Yoyankha
2.4.1 Mamita a Madzi a Magetsi
Ma electromagnetic water metering ali ndi nthawi yoyankha mwachangu. Akasintha liwiro la kuyenda kwa madzi, EMF yomwe imayambitsa imasintha nthawi yomweyo, ndipo meter imatha kuzindikira ndikulembetsa kusinthaku mwachangu. Nthawi yoyankha mwachangu iyi imawapangitsa kukhala oyenera kugwiritsidwa ntchito komwe kumafunika kuyang'anira kusintha kwa kayendedwe ka madzi nthawi yeniyeni, monga m'mafakitale komwe kusintha kwadzidzidzi kwa kufunikira kwa madzi kuyenera kuzindikirika mwachangu ndikuyendetsedwa.
2.4.2 Mamita a Madzi Opangidwa ndi Ultrasonic
Ma ultrasound water meter amaperekanso nthawi yoyankha mwachangu. Kuyeza nthawi yoyenda ya mafunde a ultrasound ndi njira yofulumira, ndipo kusintha kulikonse kwa liwiro la kuyenda kwa madzi kumaonekera mwachangu mu kusiyana kwa nthawi komwe kumayesedwa. Izi zimathandiza kuzindikira mwachangu kusiyana kwa kuchuluka kwa kuyenda kwa madzi, zomwe ndizothandiza pa ntchito monga kuyang'anira netiweki yogawa madzi, komwe kusintha kwadzidzidzi kwa machitidwe ogwiritsira ntchito madzi kumatha kuzindikirika mwachangu.
3. Zoganizira za chilengedwe ndi kukhazikitsa
3.1 Zofunikira pa Kukhazikitsa
3.1.1 Mamita a Madzi a Magetsi
Ma electromagnetic water meter amafuna kutalika kwa chitoliro cholunjika kuchokera pamwamba mpaka pansi pa malo oyika mita. Izi zimafuna kuonetsetsa kuti madzi akuyenda bwino komanso mofanana asanalowe mu mita, zomwe ndizofunikira kuti muyeze molondola. Nthawi zambiri, chitoliro cholunjika kuchokera pamwamba chimakhala chowirikiza ka 5 mpaka 10 kuposa m'mimba mwake wa chitoliro ndi chitoliro cholunjika kuchokera pansi chomwe chimakhala chowirikiza ka 2 mpaka 5 kuposa m'mimba mwake wa chitoliro. Kuphatikiza apo, ma electromagnetic water meter amafunika kuyikidwa pamalo pomwe palibe kusokoneza kwamphamvu kwa maginito akunja, chifukwa izi zitha kusokoneza mphamvu ya maginito mkati mwa mita ndikukhudza kulondola kwa miyeso.
3.1.2 Mamita a Madzi Opangidwa ndi Ultrasonic
Ma ultrasound water meter ndi osinthasintha kwambiri pankhani ya zofunikira pakuyika. Nthawi zambiri amafunikira kutalika kochepa kwa mapaipi poyerekeza ndi ma electromagnetic meter. Nthawi zina, kutalika kwa mapaipi olunjika kukwera katatu kuposa mainchesi a mapaipi kapena kuchepera kungakhale kokwanira. Izi zimapangitsa kuti zikhale zosavuta kuziyika m'mapayipi omwe alipo kale komwe malo oyendetsera mapaipi olunjika angakhale ochepa. Komabe, ma ultrasound water meter amafunika kuyikidwa pamalo pomwe khoma la mapaipi ndi losalala komanso lopanda dzimbiri kapena kukula kwa sikelo, chifukwa izi zitha kukhudza kutumiza ndi kulandira mafunde a ultrasound.
3.2 Kusamala ndi chilengedwe
3.2.1 Mamita a Madzi a Magetsi
Ma electromagnetic water metering amazindikira mphamvu yamagetsi ya madzi. Amapangidwa kuti ayesere kuyenda kwa madzi oyendetsera magetsi, ndipo ngati madziwo ali ndi mphamvu yochepa kwambiri yamagetsi (monga madzi oyera kwambiri), EMF yomwe imayambitsa ikhoza kukhala yofooka kwambiri kuti isayesedwe molondola. Kuphatikiza apo, monga tafotokozera kale, mphamvu yamagetsi yakunja ingasokoneze magwiridwe antchito a electromagnetic water metering. M'malo opangira mafakitale okhala ndi ma motors akuluakulu amagetsi, ma transformer, kapena magwero ena a mphamvu yamagetsi, chitetezo chapadera kapena malo oyenera a metering angafunike kuti zitsimikizire kuti muyeso wolondola.
3.2.2 Mamita a Madzi Opangidwa ndi Ultrasonic
Ma ultrasound water meter amazindikira kupezeka kwa thovu la mpweya, zinthu zolimba zopachikidwa, komanso kusintha kwa mphamvu ya mawu a madzi. Thovu la mpweya limatha kufalitsa mafunde a ultrasound, zomwe zimapangitsa kuti nthawi yowuluka isayende bwino. Zinthu zolimba zopachikidwa, makamaka ngati ndi zazikulu kapena zokhuthala kwambiri, zingakhudzenso kufalikira kwa mafunde a ultrasound. Kuphatikiza apo, kusintha kwa kutentha, mchere, kapena kukhuthala kwa madzi kungasinthe mphamvu zake za mawu, zomwe zingafunike kusintha kwa mphamvu nthawi zina kuti zisunge muyeso wolondola.
4. Zoganizira za Mtengo
4.1 Mtengo Woyamba
Ma electromagnetic water meter nthawi zambiri amakhala ndi mtengo wokwera kwambiri poyamba. Izi zimachitika chifukwa cha njira yovuta yopangira mphamvu ya maginito - kupanga zinthu, ma electrode opangidwa molondola, ndi zida zamagetsi zamakono zomwe zimafunikira poyesa EMF yoyambitsidwa. Zipangizo zomwe zimagwiritsidwa ntchito popanga, makamaka zomwe zimagwiritsidwa ntchito pamagetsi a maginito ndi chingwe cha chubu choyendera (kuti zitsimikizire kuti magetsi akutetezedwa), zimathandizanso kuti mtengo wake ukhale wokwera.
4.1.2 Mamita a Madzi Opangidwa ndi Ultrasonic
Ma ultrasound water meter amakhalanso ndi mtengo woyambira wokwera, ngakhale nthawi zina amatha kukhala otsika pang'ono kuposa a electromagnetic meter, kutengera mtundu ndi wopanga. Mtengo wake umayendetsedwa makamaka ndi ma ultrasound transducers apamwamba kwambiri, zida zamagetsi zamakono zopangira ma signal, komanso kufunikira kwa kuwerengera molondola panthawi yopanga. Komabe, pamene ukadaulo ukukulirakulira komanso ndalama zogulira zikuyamba kugwira ntchito, mtengo wa ultrasound water meter wakhala ukuchepa pang'onopang'ono.
4.2 Ndalama Zokonzera
4.2.1 Mamita a Madzi a Magetsi
Mtengo wokonza ma electromagnetic water meter ndi wochepa. Ntchito zazikulu zokonza zimaphatikizapo kuyang'anira ndi kuyeretsa ma electrode nthawi ndi nthawi kuti apewe kuipitsidwa, zomwe zingakhudze kulondola kwa miyeso. Nthawi zina, ngati zida zopangira maginito zikuwonetsa zizindikiro zakuwonongeka kapena ngati pali mavuto ndi zamagetsi, kukonza mozama kwambiri kapena kusintha zida kungafunike. Komabe, popeza palibe zida zosuntha mu gawo loyezera, zofunikira zonse zosamalira sizolemetsa kwambiri.
Ma ultrasound water meter nthawi zambiri amakhala ndi ndalama zochepa zokonzera. Popeza palibe zida zosuntha ndipo ma ultrasound transducer nthawi zambiri amakhala olimba, ntchito yayikulu yokonza ndikuyang'ana nthawi ndi nthawi ngati pali zizindikiro zilizonse za kuwonongeka kwa ma transducer kapena ma signal - processing electronics. Mu ntchito zomwe madzi ali ndi zinthu zolimba kwambiri kapena komwe kuli chiopsezo cha transducer kuipitsidwa, kuyeretsa nthawi ndi nthawi pamalo a transducer kungakhale kofunikira. Koma ponseponse, poyerekeza ndi mitundu ina ya ma water meter, ma ultrasound water meter amafunika kukonza pang'ono komanso kotsika mtengo.
5. Mapulogalamu
5.1 Mamita a Madzi a Magetsi
Ma electromagnetic water meter amagwiritsidwa ntchito kwambiri m'mafakitale komwe kuyeza molondola kuchuluka kwa madzi oyenda bwino ndikofunikira. Izi zikuphatikizapo mafakitale monga kupanga mankhwala, kupanga magetsi (poyezera madzi ozizira), ndi kupanga chakudya ndi zakumwa. M'magawo oyeretsera madzi ndi madzi otayidwa, ma electromagnetic water meter amagwiritsidwa ntchito kuyeza kuyenda kwa madzi osaphika, madzi oyeretsedwa, ndi madzi otayidwa. Amagwiritsidwanso ntchito kwambiri m'nyumba zazikulu zamalonda ndi m'nyumba zogona kuti apereke ndalama zolondola zogwiritsira ntchito madzi.
Ma ultrasound water meter amagwiritsa ntchito kwambiri poyesa madzi m'nyumba, makamaka pamene cholinga chake ndi kuyeza molondola kuchuluka kwa madzi omwe akuyenda komanso kuzindikira kutuluka kwa madzi. Amagwiritsidwanso ntchito m'machitidwe othirira ulimi, komwe madzi amatha kukhala ndi zinyalala monga mchenga ndi matope, ndipo njira yoyezera yosasokoneza ya ma ultrasound meter imathandiza kupewa mavuto okhudzana ndi kutsekeka kapena kuwonongeka kwa zinyalalazi. Kuphatikiza apo, ma ultrasound water meter ndi oyenera kugwiritsidwa ntchito m'maukonde ogawa madzi kuti aziyang'anira kuyenda kwa madzi m'malo osiyanasiyana, kuphatikiza m'malo omwe ali ndi mapaipi ovuta komwe kufunikira kokhazikika kwa ma ultrasound meter ndikwabwino.
Pomaliza, zoyezera madzi zamagetsi ndi zamagetsi zonse zimapereka ubwino wapadera ndipo zili ndi madera awoawo ogwiritsira ntchito. Kusankha pakati pa ziwirizi kumadalira zinthu zosiyanasiyana monga zofunikira pa ntchitoyo, makhalidwe a madzi omwe akuyesedwa, malo oyikamo, ndi kuganizira za mtengo ndi phindu. Mwa kuwunika mosamala kusiyana kumeneku, ogwiritsa ntchito amatha kusankha ukadaulo woyenera kwambiri woyezera madzi kuti akwaniritse zosowa zawo kuti madzi akhale olondola, odalirika, komanso otsika mtengo.muyeso.
Nthawi yotumizira: Juni-05-2025