Injini yemoto yamafutha aqhelekileyo kaloliwe wokutshintsha inzwa yoxinzelelo 1875784C92

1.umgaqo wokusebenza

Umgaqo osebenzayo we-metal resistance strain gauge yinto yokuba ukuxhathisa kwe-strain adsorbed kwizinto ezisisiseko zitshintsha ngokuguqulwa komatshini, okubizwa ngokuba yi-resistance strain effect. Ixabiso lokuchasana le-conductor yensimbi lingabonakaliswa ngolu hlobo lulandelayo:

R=ρ

Apho: ρ-resistivity yomqhubi wentsimbi (ω/m)

S—— Indawo enqamlezileyo yomqhubi ()

Ubude be-L bomqhubi (m)

Makhe sithathe ukuxhathisa koxinzelelo lwentsimbi yentsimbi njengomzekelo. Xa ucingo lwensimbi luxhomekeke kumandla angaphandle, ubude bayo kunye nommandla we-cross-sectional buya kutshintsha. Ukusuka kwifomula engentla, kunokubonwa ngokulula ukuba ixabiso layo lokumelana liya kutshintsha. Ukuba intambo yensimbi yoluliwe ngamandla angaphandle, ubude bayo buya kwanda kwaye indawo yayo ye-cross-sectional iya kuncipha, kwaye ixabiso layo lokumelana liya kwanda. Xa ucingo lunyanzeliswa ngamandla angaphandle, ubude buyancipha kwaye inxalenye yesiphambano iyanda, kwaye ixabiso lokumelana liyancipha. Ngethuba nje ukuguqulwa kokumelana kulinganiswa (ngokuqhelekileyo i-voltage ngaphesheya kokumelana kuyalinganiswa), imeko yoxinzelelo lwentambo yocingo inokufumaneka.

2.Ukusetyenziswa komgaqo

Inzwa ye-ceramic enganyangekiyo kwi-corrosion ayinalo ukuhanjiswa kolwelo, kwaye uxinzelelo lusebenza ngokuthe ngqo kumphezulu we-ceramic diaphragm, obangela ukuba i-diaphragm ikhubazeke kancinci. Izichasi zefilimu ezishinyeneyo ziprintwa kumphezulu ongasemva we-ceramic diaphragm kwaye ziqhagamshelwe ukwenza ibhulorho yeWheatstone (ibhulorho evaliweyo). Ngenxa yesiphumo se-piezoresistive ye-piezoresistor, ibhulorho ivelisa i-voltage ehambelana kakhulu ne-linear voltage ehambelana noxinzelelo kunye nokulingana nombane wokuvuselela. Isignali esemgangathweni ilinganiswe njenge-2.0 / 3.0 / 3.3 mV / V ngokweendidi ezahlukeneyo zoxinzelelo. Ngokusebenzisa i-laser calibration, inzwa inozinzo oluphezulu lobushushu kunye nokuzinza kwexesha. Inzwa inembuyekezo yayo yobushushu be-0 ~ 70 ℃ kwaye inokunxibelelana ngokuthe ngqo namajelo amaninzi.

I-Ceramic yimathiriyeli eyaziwayo ene-elasticity ephezulu, ukuxhathisa ukubola, ukuxhathisa ukunxiba, ukuxhathisa impembelelo kunye nokumelana nokungcangcazela. Uzinzo lwe-thermal ye-ceramics kunye nokumelana kwayo nefilimu eshinyeneyo kunokwenza ubushushu bayo bokusebenza bube phezulu njenge-40 ~ 135 ℃, kwaye inokuchaneka okuphezulu kunye nokuzinza kumlinganiselo. Isidanga sokufakelwa kombane> 2kV, isignali eyomeleleyo yemveliso kunye nozinzo oluhle lwexesha elide. Izinzwa zeCeramic ezineempawu eziphezulu kunye nexabiso eliphantsi liya kuba ngulwalathiso lophuhliso lweenzwa zoxinzelelo. EYurophu naseMelika, kukho umkhwa wokutshintsha ngokupheleleyo ezinye iintlobo zezinzwa. E-China, abasebenzisi abaninzi nangakumbi basebenzisa izinzwa ze-ceramic ukuthatha indawo ye-silicone yoxinzelelo lwe-diffused sensors.