Tsheb cav roj hom kev tsheb ciav hlau siab hloov sensor 1875784C92

1.Txoj cai ntawm kev ua haujlwm

Lub hauv paus ntsiab lus ntawm kev ua hauj lwm ntawm cov hlau tsis muaj zog strain gauge yog qhov tshwm sim uas cov strain resistance adsorbed ntawm lub hauv paus cov ntaub ntawv hloov nrog txhua yam deformation, feem ntau hu ua cov nyhuv strain. Tus nqi kuj ntawm tus neeg xyuas pib hlau tuaj yeem qhia los ntawm cov qauv hauv qab no:

R = r

Qhov twg: ρ-resistivity ntawm hlau conductor (ω / m)

S — Hla ntu ntawm tus neeg xyuas pib ()

L-ntev ntawm tus neeg xyuas pib (m)

Cia peb coj cov strain resistance ntawm hlau hlau ua piv txwv. Thaum cov hlau hlau raug rau sab nraud quab yuam, nws qhov ntev thiab ntu ntu yuav hloov pauv. Los ntawm cov qauv saum toj no, nws tuaj yeem pom tau yooj yim tias nws tus nqi kuj yuav hloov. Yog hais tias cov hlau hlau yog stretched los ntawm sab nraud quab yuam, nws qhov ntev yuav nce thiab nws qhov chaw hla ntu yuav txo qis, thiab nws cov nqi kuj yuav nce ntxiv. Thaum cov hlau yog compressed los ntawm sab nraud quab yuam, qhov ntev yuav txo qis thiab tus ntoo khaub lig seem nce, thiab tus nqi kuj txo. Ntev npaum li qhov kev hloov pauv ntawm qhov kev tiv thaiv yog ntsuas (feem ntau yog qhov ntsuas hluav taws xob thoob plaws qhov kev tiv thaiv), qhov xwm txheej ntawm cov kab mob tuaj yeem tau txais.

2.Principle daim ntawv thov

Cov tshuaj tiv thaiv corrosion-resistant ceramic siab sensor tsis muaj kua kis tau tus mob, thiab lub siab ncaj qha ua rau pem hauv ntej nto ntawm ceramic diaphragm, ua rau lub diaphragm me ntsis deformed. Thick film resistors yog luam tawm nyob rau sab nraum qab ntawm lub diaphragm ceramic thiab txuas rau tsim Wheatstone choj (kaw choj). Vim lub piezoresistive nyhuv ntawm piezoresistor, tus choj generates ib tug heev linear voltage teeb liab proportional rau lub siab thiab proportional rau lub excitation voltage. Tus qauv teeb liab yog ntsuas raws li 2.0 / 3.0 / 3.3 mV / V raws li qhov sib txawv siab ntau yam. Los ntawm laser calibration, lub sensor muaj kub stability thiab lub sij hawm stability. Lub sensor muaj nws tus kheej qhov kub thiab txias ntawm 0 ~ 70 ℃ thiab tuaj yeem tiv tauj ncaj qha nrog cov xov xwm feem ntau.

Ceramic yog cov khoom siv tau lees paub nrog cov elasticity siab, corrosion kuj, hnav tsis kam, cuam tshuam tsis kam thiab kev co kuj. Lub thermal stability ntawm ceramics thiab nws tuab zaj duab xis kuj yuav ua rau nws ua hauj lwm kub ntau li -40 ~ 135 ℃, thiab nws muaj qhov tseeb thiab ruaj khov nyob rau hauv kev ntsuas. Hluav taws xob rwb thaiv tsev degree> 2kV, muaj zog tso zis teeb liab thiab zoo mus ntev stability. Ceramic sensors nrog cov yam ntxwv siab thiab tus nqi qis yuav yog txoj kev loj hlob ntawm lub siab sensors. Hauv Tebchaws Europe thiab Amelikas, muaj ib qho kev hloov pauv tag nrho lwm hom sensors. Hauv Suav teb, ntau thiab ntau cov neeg siv siv ceramic sensors los hloov diffused silicon siab sensors.