Izinhlobo zama-pressure transmitters

Ukuzethula okulula kwesidlulisi somfutho

Njengenzwa yokucindezela okukhiphayo kuyisignali evamile, isidlulisi sokucindezela siyithuluzi elamukela ukuguquguquka kokucindezela futhi likuguqulele kusignali evamile yokuphumayo ngesilinganiso.Ingakwazi ukuguqula amapharamitha wokucindezela ngokomzimba wegesi, uketshezi, njll. ezwakala inzwa yeseli yomthwalo ibe amasignali kagesi ajwayelekile (afana no-4-20mADC, njll.) ukuze inikeze amathuluzi esibili afana nokukhombisa ama-alamu, amarekhodi, izilawuli, njll. ukulinganisa kanye nenkomba Kanye nokulawulwa kwenqubo.

Ukuhlukaniswa kwama-pressure transmitters

Imvamisa ama-pressure transmitter esikhuluma ngawo ahlukaniswa ngokwesimiso:
Ama-Capacitive pressure transmitters, ama-resistive pressure transmitter, ama-inductive pressure transmitter, ama-semiconductor pressure transmitters, nama-piezoelectric pressure transmitter ukuze kukale imvamisa ephezulu.Phakathi kwazo, ama-resissive pressure transmitters asetshenziswa kakhulu.I-capacitive pressure transmitter ithatha i-Rosemount's 3051S transmitter njengommeleli wemikhiqizo esezingeni eliphezulu.

Ama-pressure transmitters angahlukaniswa abe yinsimbi, i-ceramic, i-silicon ehlakazekile, i-silicon ye-monocrystalline, isafire, ifilimu e-sputtered, njll. ngokuvumelana nezingxenye ezizwelayo zokucindezela.

• I-metal pressure transmitter inokunemba okungalungile, kodwa inomthelela omncane wokushisa, futhi ifanele izindawo ezinebanga elibanzi lokushisa kanye nezidingo zokunemba okuphansi.
• Izinzwa ze-Ceramic pressure zinokunemba okungcono, kodwa zithinteka kakhulu izinga lokushisa.I-Ceramics nayo inenzuzo yokumelana nomthelela nokumelana nokugqwala, okungasetshenziswa emkhakheni wokuphendula.
• Ukunemba kokudluliselwa kwengcindezi ye-silicon esabalele kuphezulu kakhulu, futhi izinga lokushisa liphezulu futhi kukhulu, ngakho-ke isinxephezelo sezinga lokushisa ngokuvamile siyafuneka ngaphambi kokuthi sisetshenziswe.Ngaphezu kwalokho, ngisho nangemva kwesinxephezelo sokushisa, ingcindezi engaphezu kuka-125 ° C ayikwazi ukulinganiswa.Kodwa-ke, ekamelweni lokushisa, i-coefficient yokuzwela ye-silicon ehlukanisiwe iphindwe izikhathi ezingu-5 kune-ceramics, ngakho-ke ivame ukusetshenziswa emkhakheni wokulinganisa ukunemba okuphezulu.
• I-Single crystal silicon pressure transmitter iyinzwa enembe kakhulu ekusebenzeni kwezimboni.Kuyinguqulo ethuthukisiwe ye-silicon ehlakazekile.Yiqiniso, intengo ibuye ithuthukiswe.Njengamanje, i-Yokogawa yaseJapane ingummeleli emkhakheni we-monocrystalline silicon pressure.
• I-transmitter ye-sapphire pressure ayizwani nokushintsha kwezinga lokushisa, futhi inezici ezinhle zokusebenza ngisho nangaphansi kwezimo zokushisa eziphezulu;isafire inokumelana nemisebe enamandla kakhulu;akukho pn drift;ingasebenza ngokujwayelekile ngaphansi kwezimo ezimbi kakhulu zokusebenza futhi inokwethenjelwa Ukusebenza okuphezulu, ukunemba okuhle, iphutha elincane lokushisa, kanye nokusebenza kwezindleko eziphezulu.
• I-sputtering yefilimu encane yokucindezela i-pressure ayinayo into enamathelayo, futhi ibonisa ukuzinza nokuthembeka okuphezulu kunenzwa yegeji yokulinganisa okunamathelayo;ayithintwa kancane izinga lokushisa: lapho izinga lokushisa lishintsha ngo-100 ℃, i-zero drift ingu-0.5% kuphela.Ukusebenza kwayo kwezinga lokushisa kuphakeme kakhulu kunenzwa yokucindezela kwe-silicon esakazwayo;ngaphezu kwalokho, ingathintana ngqo nemidiya edlayo.

Izimiso zezinhlobo ezahlukene zama-pressure transmitters

• Umgomo we-capacitive pressure transmitter.

Lapho ukucindezela kusebenza ngokuqondile ebusweni be-diaphragm yokulinganisa, i-diaphragm ikhiqiza ukuguqulwa okuncane.Isekhethi enembayo ephezulu ku-diaphragm yokulinganisa iguqula lokhu kuguquguquka okuncane kube i-voltage eqondile kakhulu ngokulingana nokucindezela futhi ngokulingana ne-voltage evusa amadlingozi.Isiginali, bese usebenzisa i-chip ezinikele ukuguqula le siginali ye-voltage ibe isignali evamile yemboni engu-4-20mA noma isignali yamandla kagesi engu-1-5V.

• Umgomo we-diffused silicon pressure transmitter

Ingcindezi yendawo elinganisiwe isebenza ngokuqondile ku-diaphragm yenzwa (imvamisa i-diaphragm engu-316L), okubangela ukuthi i-diaphragm ikhiqize ukugudluka okuncane ngokulingana nokucindezela kwe-medium, iguqule inani lokumelana lenzwa, futhi iyithole nge- Isekhethi ye-Wheatstone Lokhu kushintsha, futhi uguqule futhi ukhiphe isignali yokulinganisa ejwayelekile ehambisana nale ngcindezi.

• Isimiso se-monocrystalline silicon pressure transmitter

Izinzwa zokucindezela kwe-piezoresistive zakhiwa kusetshenziswa umphumela we-piezoresistive we-silicon eyodwa yekristalu.I-crystal silicon wafer eyodwa isetshenziswa njengento enwebekayo.Lapho ingcindezi ishintsha, i-silicon eyodwa ye-crystal ikhiqiza ubunzima, ukuze ukumelana nokucindezeleka okuhlakazeke ngokuqondile kuyo kukhiqiza ushintsho ngokulingana nokucindezela okulinganiselwe, bese isignali ehambisanayo yokuphuma kwe-voltage itholwa yisekethe yebhuloho.

• Isimiso se-ceramic pressure transmitter

Ukucindezela kusebenza ngokuqondile endaweni engaphambili ye-ceramic diaphragm, okubangela ukuguqulwa okuncane kwe-diaphragm.I-resistor ewugqinsi yefilimu iphrintwe ngemuva kwe-diaphragm ye-ceramic futhi ixhunywe ebhulohweni le-Wheatstone (ibhuloho elivaliwe) ngenxa yomphumela we-piezoresistive we-varistor , Ibhuloho likhiqiza isignali ye-voltage eqondile kakhulu ngokulingana nokucindezela nokulingana nomthamo we-excitation. .Ngokuvamile esetshenziselwa ukulinganisa ingcindezi ye-compressor yomoya, ama-ceramics amaningi asetshenziswa.

• Isimiso se-strain gauge pressure transmitter

Ama-transmitter we-strain gauge pressure asetshenziswa kakhulu amageji okumelana nensimbi nama-semiconductor strain gauge.I-Metal resistance gauge iwuhlobo lwedivayisi ezwelayo eguqula ushintsho lwenkinga esiqeshini sokuhlola lube isignali kagesi.Kunezinhlobo ezimbili ze-wire strain gauge kanye ne-metal foil strain gauge.Ngokuvamile i-strain gauge iboshelwa ngokuqinile ku-matrix ye-mechanical strain nge-adhesive ekhethekile.Lapho i-matrix ibhekene noshintsho lwengcindezi, igeji ye-resistor gauge nayo iyawohloka, ukuze inani lokumelana ne-strain gauge lishintshe, ukuze I-voltage esetshenziswa ku-resistor ishintshe.Ama-transmitter we-strain gauge pressure awavamile uma kuqhathaniswa emakethe.

• I-Sapphire pressure transmitter

Isidluliseli somfutho wesafire sisebenzisa isimiso sokusebenza sokumelana nobunzima, samukela izingxenye ezizwelayo ze-silicon-sapphire ezinemba kakhulu, futhi siguqule isignali yokucindezela ibe isignali kagesi evamile ngokusebenzisa isekethe ye-amplifier ezinikele.

• I-sputtering film pressure transmitter

Isici esizwela ukucindezela kwe-sputtering sikhiqizwa ubuchwepheshe be-microelectronics, sakha ibhuloho eliqinile futhi elizinzile le-Wheatstone phezu kwediaphragm yensimbi engenasici.Lapho ingcindezi yendawo elinganisiwe isebenza kudiaphragm yensimbi engagqwali enwebekayo, ibhuloho le-Wheatstone ngakolunye uhlangothi likhiqiza isignali yokuphuma kukagesi ngokulingana nokucindezela.Ngenxa yokumelana nomthelela omuhle, amafilimu ane-sputtered avame ukusetshenziswa ezikhathini ezinemithelela evamile yengcindezi, njengemishini yamanzi.

Izinyathelo zokuphepha zokukhetha isidlulisi somfutho

• Ukukhetha inani lomfutho we-Transmitter:

Okokuqala thola inani eliphezulu lengcindezi elinganisiwe ohlelweni.Ngokuvamile, udinga ukukhetha isidlulisi esinebanga lokucindezela elicishe libe likhudlwana ngokuphindwe ka-1.5 kunenani eliphakeme, noma uvumele ububanzi bengcindezi buwele kusidlulisi sokucindezela.I-1/3~2/3 yobubanzi obujwayelekile nayo iyindlela evamile.

• Hlobo luni lwe-pressure medium:

Uketshezi olubonakalayo nodaka kuzovimba izimbobo zokucindezela.Ingabe izincibilikisi noma izinto ezonakalisayo ziyocekela phansi izinto ezikumshini wokuthumela ezixhumene ngqo nalezi zindaba.
Impahla yesidluliseli somfutho ojwayelekile esithinta okuphakathi yinsimbi engagqwali engu-316.Uma i-medium ingagqwali ku-316 insimbi engagqwali, ngakho-ke ngokuyisisekelo zonke izidluliseli zokucindezela zifanele ukukala ukucindezela kwendawo;
Uma okuphakathi kugqwala ku-316 insimbi engagqwali, kufanele kusetshenziswe uphawu lwamakhemikhali, futhi kusetshenziswe isilinganiso esingaqondile.Uma ithubhu le-capillary eligcwele uwoyela we-silicone lisetshenziselwa ukuqondisa ingcindezi, lingavimbela isidlulisi sokucindezela ekugqwaleni futhi lelule impilo yesidlulisi somfutho.

• Kungakanani ukunemba okudingayo isidlulisi:

Ukunemba kunqunywa yilokhu: okungeyona i-linearity, hysteresis, ukungaphindi, izinga lokushisa, isikali se-zero offset, nezinga lokushisa.Uma kuphakeme ukunemba, intengo iyanda.Ngokuvamile, ukunemba kwe-silicon pressure transmitter esabalele ingu-0.5 noma 0.25, futhi i-capacitive noma i-monocrystalline silicon pressure transmitter inokunemba kwe-0.1 noma i-0.075.

• Ukuxhumana kwenqubo yesithumeli:

Ngokuvamile, ama-pressure transmitter afakwa emapayipini noma emathangeni.Yiqiniso, ingxenye encane yazo ifakiwe futhi isetshenziswe ngamamitha okugeleza.Ngokuvamile kunezinhlobo ezintathu zokufaka zokudlulisa ingcindezi: intambo, i-flange, ne-clamp.Ngakho-ke, ngaphambi kokukhetha i-transmitter yokucindezela, uxhumano lwenqubo kufanele lucatshangelwe.Uma i-threaded, kuyadingeka ukunquma ukucaciswa kwentambo.Ngama-flanges, kuyadingeka ukucabangela ukucaciswa kwe-flange kobubanzi obujwayelekile.

Isingeniso sembonini ye-pressure transmitter

Cishe amazwe angu-40 emhlabeni wonke abambe iqhaza ocwaningweni nasekukhiqizweni kwezinzwa, i-United States, Japan, neJalimane okuyizifunda ezinezinzwa ezinkulu kakhulu.La mazwe amathathu ehlangene enza ngaphezu kwama-50% emakethe yezinzwa zomhlaba.

Namuhla, imakethe yokudlulisa ukucindezela ezweni lami iyimakethe ekhulile enemakethe ephezulu.Kodwa-ke, isikhundla esiphezulu ngamazwe angaphandle amelwe u-Emerson, i-Yokogawa, i-Siemens, njll. Imikhiqizo yegama lomkhiqizo ithatha cishe u-70% wesabelo semakethe futhi inenzuzo ephelele kumaphrojekthi wobunjiniyela amakhulu naphakathi.

Lokhu kungenxa yokulandelana kwesu lezwe lami lokusebenzisa isu elithi “market for technology”, elathinta kakhulu amabhizinisi kahulumeni wezwe lami futhi elake laba sesimweni sokwehluleka, kodwa ngesikhathi esifanayo, abanye abakhiqizi, bamele. ngamabhizinisi azimele aseShayina, avele buthule futhi akhule abe namandla.Imakethe yaseChina yokudlulisa umfutho wesikhathi esizayo igcwele izinto ezintsha ezingaziwa.