Injini yemoto uphethiloli ovamile wesitimela ingcindezi switch inzwa 1875784C92

1.isimiso sokusebenza

Umgomo wokusebenza wegeji ye-metal resistance gauge into eyenza ukuthi ukumelana ne-strain kukhangiswe kusisekelo sezinto kushintsha ngokushintshashintsha komshini, okuvame ukwaziwa ngokuthi ukumelana ne-resistance effect. Inani lokumelana le-conductor yensimbi lingavezwa ngefomula elandelayo:

R=ρ

Lapho: ρ-ukumelana nomqhubi wensimbi (ω/m)

S—— Indawo ye-Cross-sectional of conductor ()

L-ubude be-conductor (m)

Ake sithathe ukuphikiswa kocingo lwensimbi njengesibonelo. Lapho ucingo lwensimbi lungaphansi kwamandla angaphandle, ubude balo nendawo ye-cross-sectional izoshintsha. Kusukela kufomula engenhla, kungabonakala kalula ukuthi inani layo lokumelana lizoshintsha. Uma ucingo lwensimbi lunwetshwa ngamandla angaphandle, ubude bayo buzokhula futhi indawo yayo ye-cross-sectional izokwehla, futhi inani layo lokumelana lizokhula. Lapho ucingo lucindezelwa amandla angaphandle, ubude buyancipha futhi isigaba esiphambanayo siyanda, futhi inani lokumelana liyancipha. Uma nje ukuguqulwa kokumelana kukalwa (ngokuvamile i-voltage yonkana yokumelana iyalinganiswa), isimo sokucindezeleka kocingo lwe-strain singatholakala.

2.Ukusebenza kwezimiso

Inzwa yengcindezi ye-ceramic emelana nokugqwala ayinakho ukudluliswa koketshezi, futhi ingcindezi isebenza ngokuqondile endaweni engaphambili ye-ceramic diaphragm, okubangela ukuthi i-diaphragm yonakale kancane. Izinqamuleli zefilimu eziwugqinsi ziphrintwa ngemuva kwe-diaphragm ye-ceramic futhi zixhunywe ukwenza ibhuloho le-Wheatstone (ibhuloho elivaliwe). Ngenxa yomphumela we-piezoresistive we-piezoresistor, ibhuloho likhiqiza isignali ye-voltage eqondile kakhulu ngokulingana nokucindezela futhi iphinde ilingane ne-excitation voltage. Isignali ejwayelekile ilinganiswa njengo-2.0/3.0/3.3 mV/V ngokuya ngezigaba zengcindezi ezihlukene. Ngokulinganisa kwe-laser, inzwa inokuqina okuphezulu kwezinga lokushisa kanye nokuzinza kwesikhathi. Inzwa inesinxephezelo sayo sokushisa esingu-0 ~ 70℃ futhi ingathintana ngqo nemidiya eminingi.

I-Ceramic iyinto eyaziwayo enokuqina okuphezulu, ukumelana nokugqwala, ukumelana nokugqoka, ukumelana nomthelela kanye nokumelana nokudlidliza. Ukuzinza okushisayo kwezitsha zobumba kanye nokumelana kwayo nefilimu ewugqinsi kungenza izinga lokushisa elisebenzayo lifinyelele ku-40 ~ 135℃, futhi linokunemba okuphezulu nokuzinza esikalini. Idigri yokufakwa kukagesi > 2kV, isignali ephumayo enamandla nokuzinza okuhle kwesikhathi eside. Izinzwa ze-Ceramic ezinezici eziphezulu kanye nentengo ephansi zizoba isiqondiso sokuthuthukiswa kwezinzwa zokucindezela. EYurophu naseMelika, kunomkhuba wokushintsha ngokuphelele ezinye izinhlobo zezinzwa. E-China, abasebenzisi abaningi ngokwengeziwe basebenzisa izinzwa ze-ceramic ukuze bangene esikhundleni sezinzwa ze-silicon ezisabalalisiwe.