Kwinkqubo yokubeka iliso koxinzelelo olwahlukileyo, sinokuqaphela ukuba ngamanye amaxesha ukukhutshwa koxinzelelo loxinzelelo olwahlukileyo kuyafuneka ukuba kusetyenzwe kwingcambu yesikwere 4 ~ 20mA isiginali. Usetyenziso olunjalo luhlala lusenzeka kwinkqubo yokulinganisa ukuhamba kwemizi-mveliso kusetyenziswa umgaqo woxinzelelo olwahlukileyo oyenye yeendlela ezidumileyo zokujongwa kwesantya sokuhamba. Emva kokuba umlinganiselo wokuhamba kwe-DP uhlaziywe ngokufutshane singakwazi ukuqonda indima ye-different pressure transmitter ekuncedeni ukusebenza kwe-flowmeter.
Iimitha ezihambayo zidlala indima ebalulekileyo ekubekeni iliso kumlinganiselo wolwelo phakathi kothungelwano lwemibhobho yemizi-mveliso entsonkothileyo ngokubonelela ngofundo lokuqukuqela ngexesha nangeziseko ezichanekileyo ezinegalelo kulawulo lwemathiriyeli olusebenzayo kunye nokhuseleko lokusebenza. Indlela yoxinzelelo olwahlukileyo yenye yetekhnoloji enkulu yokulinganisa ukuhamba okubandakanya iintlobo zee-flowmeters. Bahlukile ngolwakhiwo kodwa babelana ngeenjongo ezifanayo zokusebenza ukudala umsantsa woxinzelelo lokuhamba kobalo olusekwe kumgaqo ongundoqo weEquation kaBernoulli: Amandla ewonke aquka i-kinetic kunye namandla anokubakho ekuhambeni kolwelo ahlala engaguquguquki kungakhathaliseki iimeko. Ke ngoko eyona nto iphambili kwezo flowmeters ze-DP sisixhobo esishukumisayo (ipleyiti ye-orifice, ityhubhu ye-venturi, ityhubhu ye-pitot, i-v-cone, njl.njl.) ukudala ukukhawuleziswa kokuhamba kwicandelo lendawo, okukhokelela ekwehleni koxinzelelo lwe-hydrostatic yolwelo.
Apha kulapho i-different pressure transmitter ingena khona. Izinto eziphambili zizixhobo zoomatshini, zivelisa ngokwasemzimbeni umahluko woxinzelelo kwinkqubo kodwa akukho namnye kubo okwaziyo ukulinganisa ngokuthe ngqo ixabiso kunye nomqondiso wesiphumo. Ke badinga umncedisi wokubona umahluko woxinzelelo phakathi komsinga onyukayo kunye nosezantsi kwaye ekugqibeleni uwuguqule ube ngumqondiso wokuphuma kwexabiso lomlinganiso wokuqukuqela-- kuvakala njengomsebenzi ofaneleke ngokufanelekileyo kwi-different pressure transmitter.
Emva kokuba umlinganiselo we-DP usekiwe, umbuzo uya kuba njani umahluko woxinzelelo kunye nesantya sokuhamba kwevolumetric? Isiseko kwi-Equation kaBernoulli kunye ne-Equation Equation, ubudlelwane obungahambelaniyo bukhona phakathi koxinzelelo olwenziwayo olwahlukileyo (ΔP) kunye nesantya sangempela sokuhamba kwamanzi (Q):
Q=K√ΔP
Apho i-K imele i-coefficient yemitha ethe ngqo egqitywe yimiba yodidi lweprayimari kunye neminye imiba emininzi (uxinzelelo lolwelo, ubungakanani bombhobho njalo njalo). Isiginali ye-4 ~ 20mA ye-Transmitter eluhlaza ayifani nesantya sokuhamba kwaye ayikwazi ukumela ngokufanelekileyo intsingiselo yayo. Umba ungasonjululwa ngokudityaniswa kwengcambu yengcambu (SRE) eneengcambu ezisikweri zemveli ΔP isenza umqondiso ulungelelanise umyinge wokuqukuqela komthamo ekugqibeleni.
Ukuba umthumeli akakwazi ukwenza i-SRE ngaphakathi, ukubala kufuneka kusingathwe yikhompyuter yokuhamba yangaphandle okanye inkqubo yolawulo enokuthi idibanise ubunzima kunye namanqaku eempazamo anokubakho kwindlela yomqondiso. Ke ngoko abadluliseli be-DP banamhlanje bahlala benomsebenzi owakhelwe ngaphakathi we-SRE kwisekethe ye-analog kwaye banokukhupha isikweri esinengcambu ye-4 ~ 20mA. Ngaphezu koko, ii-DP transmitters zinokusebenzisa ukuqukuqela okusezantsi kokunqunyulwa ukuthoba isivamvo sokutsaleka esinokukhuliswa ngokungenakulinganiswa ngesantya sokuhamba okuphantsi. Lo msebenzi wesoftware unyanzelisa imveliso ukuya kwi-4 mA (0% flow) xa i-computing flow flowing iwela ngaphantsi komda ochaziweyo ukuphepha isignali ephosakeleyo kunye nokuqokelela kobuxoki.
Iinkqubo ezahlukeneyo zokulinganisa ukuqukuqela koxinzelelo yenye yezona zinto zingqiniweyo kwaye zidumileyo zolawulo lwetekhnoloji. Ngelixa zibonelela ngezinto eziluncedo ezibalaseleyo, kukwakho imida ngenxa yesakhiwo kunye nomgaqo:
+ Uyilo olusemgangathweni, itekhnoloji esekwe kakuhle
+ Ulwakhiwo olomeleleyo noluhlala luhleli, akukho ndawo zishukumayo
+ Ukuchaneka okuphuculweyo kunye nokuzinza
- Ukulahleka koxinzelelo olusisigxina
- Umyinge wokujika umlinganiselo
- Uvakalelo kutshintsho kuxinaniso lwamanzi kunye nezinye izinto
Ukukhetha i-flowmeter efanelekileyo kubalulekile ekusebenzeni kakuhle kunye nokuchaneka komlinganiselo wokuhamba kwamanzi. Ngokuqwalasela ngokubanzi imiba yokusebenza abasebenzisi banokuthatha izigqibo ezinolwazi ezihambelana neemfuno ezithile.Shanghai Wangyuanibizibandakanya kwimveliso kunye nenkonzo yomlinganiselo kunye nesixhobo sokulawula isithuba esingaphezu kweminyaka engama-20 kubandakanywa zonke iintlobo zee-flowmeters, ii-different transmitters zoxinzelelo kunye nezinye izifakelo zokulinganisa ukuhamba. Ukuba unomnye umbuzo okanye imfuneko, nceda ungathandabuzi ukuqhagamshelana nathi.
Ixesha lokuposa: Aug-25-2025