Iintlobo zoxinzelelo loxinzelelo

Ukuzazisa okulula kwe-pressure transmitter

Njengenzwa yoxinzelelo oluphumayo luphawu oluqhelekileyo, i-transmitter yoxinzelelo sisixhobo esamkela ukuguquguquka koxinzelelo kwaye siyiguqule ibe ngumqondiso oqhelekileyo wokuphuma ngokomlinganiselo. Iyakwazi ukuguqula iiparameters zoxinzelelo lomzimba wegesi, ulwelo, njl njl. uvakalelwe yinzwa yeseli yomthwalo kwiimpawu zombane eziqhelekileyo (ezifana ne-4-20mADC, njl.) Ukubonelela ngezixhobo zesibini ezifana nokubonisa i-alamu, iirekhodi, izilawuli, njl.

Ukuhlelwa kwee-pressure transmitters

Ngokwesiqhelo abathumeli boxinzelelo esithetha ngabo bohlulwe ngokomgaqo:
Abathumeli boxinzelelo lwe-Capacitive, abathumeli boxinzelelo abachasayo, abadluliseli boxinzelelo lwe-inductive, i-semiconductor pressure transmitters, kunye ne-piezoelectric pressure transmitters kumlinganiselo ophezulu we-frequency. Phakathi kwazo, i-resistive pressure transmitters zezona zisetyenziswayo. I-capacitive pressure transmitter ithatha i-Rosemount's 3051S transmitter njengommeli weemveliso eziphezulu.

Iitransmitha zoxinzelelo zinokwahlulwa zibe yintsimbi, i-ceramic, i-silicon edibeneyo, i-silicon ye-monocrystalline, isafire, ifilimu ene-sputtered, njl.

• I-Metal pressure transmitter inokuchaneka okungalunganga, kodwa inefuthe elincinci lobushushu, kwaye ifanelekile kwiindawo ezinoluhlu olubanzi lobushushu kunye neemfuno ezisezantsi zokuchaneka.
• Izinzwa zoxinzelelo lweCeramic zinokuchaneka okungcono, kodwa zichaphazeleka ngakumbi bubushushu. I-Ceramics nayo inenzuzo yokumelana nempembelelo kunye nokumelana nokubola, enokusetyenziswa kwintsimi yokuphendula.
• Ukuchaneka kokuhanjiswa koxinzelelo lwesilicon esasaziweyo kuphezulu kakhulu, kwaye iqondo lobushushu liphezulu, ngoko ke imbuyekezo yobushushu iyafuneka ngokubanzi phambi kokuba isetyenziswe. Ngaphezu koko, nangemva kwembuyekezo yeqondo lokushisa, uxinzelelo olungaphezulu kwe-125 ° C alunakulinganiswa. Nangona kunjalo, kwiqondo lokushisa lokushisa, i-coefficient ye-sensitivity ye-silicon edibeneyo ngamaxesha angama-5 i-ceramics, ngoko isetyenziswa ngokubanzi kwintsimi yokulinganisa okuchanekileyo.
• I-crystal silicon enye yoxinzelelo loxinzelelo lwe-sensor yeyona nto ichanekileyo kwi-industrial practice. Yinguqulelo ephuculweyo ye-silicon esasaziweyo. Ngokuqinisekileyo, ixabiso libuye liphuculwe. Okwangoku, i-Yokogawa yaseJapan ngummeli kwintsimi yoxinzelelo lwe-silicon ye-monocrystalline.
• I-sapphire pressure transmitter ayikhathaleli utshintsho lweqondo lokushisa, kwaye ineempawu ezintle zokusebenza naphantsi kweemeko eziphezulu zokushisa; isafire inokumelana nemitha ngokugqithisileyo; akukho pn drift; inokusebenza ngokuqhelekileyo phantsi kweemeko zokusebenza ezimbi kakhulu kwaye inokwethenjelwa Ukusebenza okuphezulu, ukuchaneka okulungileyo, impazamo encinci yokushisa, kunye nokusebenza kweendleko eziphezulu.
• I-sputtering thin film pressure transmitter ayinayo nayiphi na i-adhesive, kwaye ibonisa ukuzinza kwexesha elide kunye nokuthembeka kune-sensor strain gauge sensor; ayichatshazelwa kancinci bubushushu: xa ubushushu butshintsha 100 ℃, i-zero drift yi-0.5% kuphela. Ukusebenza kwayo kweqondo lokushisa kuphezulu kakhulu kwi-sensor ye-silicon yokusabalalisa uxinzelelo; ukongeza, inokunxibelelana ngokuthe ngqo nemithombo yeendaba ezonakalisayo.

Imigaqo yeentlobo ezahlukeneyo zoxinzelelo loxinzelelo

• Umgaqo we-capacitive pressure transmitter.

Xa uxinzelelo lusebenza ngokuthe ngqo kumphezulu we-diaphragm yokulinganisa, i-diaphragm ivelisa i-deformation encinci. I-high-precision circuit kwi-diaphragm yokulinganisa iguqula le deformation encinci ibe yi-voltage ephezulu ehambelana noxinzelelo kunye nokulinganisa kwi-voltage excitation. Isiginali, kwaye emva koko usebenzise i-chip ezinikeleyo ukuguqula lo mqondiso wombane ube ngumgangatho woshishino we-4-20mA isiginali yangoku okanye isignali ye-1-5V yombane.

• Umgaqo we-silicon esasazekileyo yokuhambisa uxinzelelo

Uxinzelelo oluphakathi olulinganisiweyo lusebenza ngokuthe ngqo kwi-diaphragm ye-sensor (ngokuqhelekileyo i-diaphragm ye-316L), ebangela ukuba i-diaphragm ivelise i-micro displacement ngokulingana noxinzelelo lwe-medium, ukuguqula ixabiso lokumelana ne-sensor, kwaye liyibhaqe ngesekethe ye-Wheatstone Olu tshintsho, kwaye uguqule kwaye ukhuphe uphawu lokulinganisa oluqhelekileyo oluhambelana nolu xinzelelo.

• Umgaqo-siseko we-monocrystalline silicon yokuhambisa uxinzelelo

Izinzwa zoxinzelelo ze-piezoresistive zakhiwe kusetyenziswa i-piezoresistive effect ye-silicon eyodwa ye-crystal. I-crystal crystal wafer enye isetyenziswa njenge-elastic element. Xa uxinzelelo lutshintsha, i-silicon enye yekristale ivelisa ubunzima, ukwenzela ukuba ukuxhathisa koxinzelelo olusasazwe ngokuthe ngqo kuyo kuvelise utshintsho oluhambelana noxinzelelo olulinganisiweyo, kwaye emva koko umqondiso we-voltage ohambelanayo ophumayo ufunyanwa yisekethe yebhulorho.

• Umgaqo we-ceramic pressure transmitter

Uxinzelelo lusebenza ngokuthe ngqo kwi-front surface ye-ceramic diaphragm, ebangela ukuguqulwa okuncinci kwe-diaphragm. I-resistor yefilimu engqingqwa ishicilelwe ngasemva kwe-diaphragm ye-ceramic kwaye iqhagamshelwe kwibhulorho ye-Wheatstone (ibhulorho evaliweyo) ngenxa yesiphumo se-piezoresistive ye-varistor, Ibhulorho ivelisa umqondiso we-voltage ohambelana kakhulu ngokuhambelana noxinzelelo kunye nokulingana nombane wokuvuselela. Ngokuqhelekileyo isetyenziselwa ukulinganisa uxinzelelo lwee-compressor zomoya, ii-ceramics ezininzi zisetyenziswa.

• Umgaqo-siseko we-strain gauge yokuhambisa uxinzelelo

Ezona zisetyenziswa ngokuqhelekileyo iigeyiji zoxinzelelo loxinzelelo ziigeyiji zentsimbi zokumelana noxinzelelo kunye neegeji zoxinzelelo lwesemiconductor. I-Metal resistance strain gauge luhlobo lwesixhobo esinovakalelo oluguqula utshintsho lwestrain kwisiqwenga sovavanyo lube luphawu lombane. Kukho iindidi ezimbini zegeyiji yocingo kunye nefoyile yentsimbi yegeyiji. Ngokuqhelekileyo i-gauge yoxinzelelo ibophelelwe ngokuqinileyo kwi-matrix yoxinzelelo lomatshini ngokusebenzisa i-adhesive ekhethekileyo. Xa i-matrix iphantsi kokutshintsha koxinzelelo, igeji yokumelana ne-strain gauge nayo ikhubaza, ukuze ixabiso lokumelana ne-strain gauge litshintshe, ukuze I-voltage isetyenziswe kwi-resistor utshintsho. Izithutha zoxinzelelo lwegeyiji yoxinzelelo zinqabile kwimarike.

• Umthumeli woxinzelelo lweSapphire

Isidlulisi soxinzelelo lwesafire sisebenzisa umgaqo wokusebenza wokuxhathisa, samkela izinto ezibuthathaka zesilicon-sapphire ezichanekileyo, kwaye ziguqula umqondiso woxinzelelo ube ngumqondiso oqhelekileyo wombane ngesekethe yeamplifier ezinikeleyo.

• I-sputtering film pressure transmitter

Isixhobo esibuthathaka soxinzelelo lwe-sputtering senziwa ngobuchwephesha be-microelectronics, senza ibhulorho eqinileyo nezinzileyo ye-Wheatstone kumphezulu wediaphragm yentsimbi enwebekayo. Xa uxinzelelo oluphakathi olulinganisiweyo lusebenza kwi-diaphragm ye-elastic stainless steel, ibhulorho ye-Wheatstone kwelinye icala ivelisa umqondiso wemveliso yombane ngokulingana noxinzelelo. Ngenxa yokuchasana kwayo nempembelelo entle, iifilimu eziphothiweyo zihlala zisetyenziswa ngamaxesha aneempembelelo zoxinzelelo rhoqo, ezifana nezixhobo zehydraulic.

Amanyathelo okukhetha isidluliseli soxinzelelo

• Ukukhetha ixabiso loluhlu loxinzelelo lwe-transmitter:

Okokuqala misela ixabiso eliphezulu loxinzelelo olulinganisiweyo kwinkqubo. Ngokuqhelekileyo, kufuneka ukhethe i-transmitter enoluhlu loxinzelelo olumalunga namaxesha angama-1.5 amakhulu kunexabiso eliphezulu, okanye uvumele uluhlu oluqhelekileyo loxinzelelo luwele kwi-transmitter yoxinzelelo. I-1/3 ~ 2/3 yoluhlu oluqhelekileyo kwakhona yindlela eqhelekileyo.

• Loluphi uhlobo lwesixhobo soxinzelelo:

Ulwelo lweViscous kunye nodaka luya kuvala amazibuko oxinzelelo. Ngaba izinyibilikisi okanye izinto ezonakalisayo ziya kutshabalalisa imathiriyeli ekwi-transmitter edibana ngqo nala majelo.
Izinto eziphathekayo ze-transmitter yoxinzelelo oluqhelekileyo oludibanisa ne-medium yi-316 yensimbi engenasici. Ukuba i-medium ayinayo i-corrosion kwi-316 insimbi engenasici, ngoko ke zonke ii-pressure transmitters zifanelekile ukulinganisa uxinzelelo lwe-medium;
Ukuba i-medium is corrosive to 316 stainless steel, i-chemical seal kufuneka isetyenziswe, kwaye umlinganiselo ongathanga ngqo kufuneka usetyenziswe. Ukuba ityhubhu ye-capillary egcwele ioli ye-silicone isetyenziselwa ukukhokela uxinzelelo, inokuthintela ukuhanjiswa koxinzelelo kwi-corrosion kunye nokwandisa ubomi bokuhambisa uxinzelelo.

• Kungakanani ukuchaneka okufunwa sisidluliseli:

Ukuchaneka kunqunywe ngu: ukungahambi kakuhle, i-hysteresis, ukungaphindi, ubushushu, i-zero offset scale, kunye nobushushu. Ukuphakama kokuchaneka, ixabiso eliphezulu. Ngokubanzi, ukuchaneka kwe-silicon esasazekileyo yokuhambisa uxinzelelo yi-0.5 okanye i-0.25, kwaye i-capacitive okanye i-monocrystalline silicon pressure transmitter inokuchaneka kwe-0.1 okanye nokuba yi-0.075.

• Inkqubo yoqhagamshelo lwesithumeli:

Ngokuqhelekileyo, ii-transmitter zoxinzelelo zifakwe kwimibhobho okanye iitanki. Ngokuqinisekileyo, inxalenye encinci yazo ifakwe kwaye isetyenziswe ngeemitha zokuhamba. Ngokuqhelekileyo kukho iindlela ezintathu zokufakela izidlulisi zoxinzelelo: intambo, i-flange, kunye ne-clamp. Ke ngoko, ngaphambi kokukhetha umthumeli woxinzelelo, uqhagamshelo lwenkqubo kufuneka luqwalaselwe. Ukuba i-threaded, kuyimfuneko ukumisela inkcazo yentambo. Kwiiflange, kuyimfuneko ukuqwalasela iinkcukacha ze-flange ze-diameter ye-nominal.

Intshayelelo yoshishino lokuhambisa uxinzelelo

Malunga namazwe angama-40 kwihlabathi liphela abandakanyeka kuphando kunye nokuveliswa kwezivamvo, apho iUnited States, iJapan, kunye neJamani ziyimimandla enesiphumo esikhulu soluvo. La mazwe mathathu edibene athatha ngaphezulu kwe-50% yemarike yezivamvo zehlabathi.

Kule mihla, imakethi yokuhambisa uxinzelelo kwilizwe lam yimarike evuthiweyo enoxinzelelo oluphezulu lwentengiso. Nangona kunjalo, isikhundla esiphezulu ngamazwe angaphandle amelwe ngu-Emerson, i-Yokogawa, i-Siemens, njl. Iimveliso ze-Brand-name akhawunti malunga ne-70% yesabelo semarike kwaye zinenzuzo epheleleyo kwiiprojekthi zobunjineli ezinkulu kunye neziphakathi.

Oku kungenxa yolandelelwano lwelizwe lam lokwamkelwa kwangoko kwesicwangciso-qhinga “sorhwebo lwetekhnoloji”, ethe yabetha kakhulu kumashishini karhulumente welizwe lam kwaye yayikhe yakwimeko yokusilela, kodwa kwangaxeshanye, abanye abavelisi, abamelwe ngamashishini abucala aseTshayina, ngokuzolileyo Babonakala kwaye bakhule bomelela. Imakethi yaseTshayina yokusasaza uxinzelelo lwexesha elizayo igcwele izinto ezintsha ezingaziwayo.