Dab tsi yog piezoelectric sensor? Dab tsi yog lub khob cua kub cua ceev sensor?
1. Taw qhia rau cov sensors
Lub sensor (Lus Askiv lub npe: transducer / sensor) yog cov cuab yeej tshawb nrhiav uas tuaj yeem nkag siab cov ntaub ntawv ntsuas thiab hloov cov ntaub ntawv nkag siab mus rau hauv cov teeb liab hluav taws xob lossis lwm cov ntaub ntawv xav tau ntawm cov ntaub ntawv tso tawm raws li qee txoj cai kom ua tau raws li cov kev xav tau ntawm cov ntaub ntawv xa mus, ua, cia. , tso saib, kaw thiab tswj. Vim muaj ntau hom sensors, nyob rau hauv tsab xov xwm no, tus editor tsuas yog qhia txog lub piezoelectric sensor thiab lub khob cua kub ceev sensor.
2. Piezoelectric sensor
Ua ntej tshaj plaws, cia peb saib qee qhov kev paub txog piezoelectric sensors. Lub siab sensors yog cov feem ntau siv sensors nyob rau hauv kev lag luam xyaum, thiab lub siab sensors peb feem ntau siv yog tsim los siv cov nyhuv piezoelectric. Cov sensors no tseem hu ua piezoelectric sensors.
Cov ntaub ntawv piezoelectric tsuas yog siv hauv piezoelectric sensors suav nrog quartz, potassium sodium tartrate, thiab ammonium dihydrogen phosphate. Ntawm lawv, quartz (silicon dioxide) yog lub ntuj siv lead ua, thiab cov nyhuv piezoelectric muaj nyob hauv cov siv lead ua no. Nyob rau hauv ib qho kev ntsuas kub, cov cuab yeej piezoelectric yeej ib txwm muaj, tab sis thaum qhov kub siab tshaj qhov no, cov cuab yeej piezoelectric ploj tag nrho (qhov kub siab no yog qhov hu ua "Curie point"). Txij li thaum hluav taws xob hloov pauv me ntsis nrog kev hloov ntawm kev ntxhov siab (uas yog, piezoelectric coefficient kuj qis), quartz yog maj mam hloov los ntawm lwm cov piezoelectric crystals. Potassium sodium tartrate muaj qhov zoo ntawm piezoelectric rhiab heev thiab piezoelectric coefficient, tab sis nws tsuas yog siv tau rau hauv ib puag ncig nrog chav tsev kub thiab av noo. Ammonium dihydrogen phosphate yog ib qho khoom siv lead ua, uas tuaj yeem tiv taus qhov kub thiab txias, yog li nws tau siv dav.
3. Cua khob cua ceev sensor
Tom qab nkag siab txog qhov kev paub txog ntawm piezoelectric sensor, cia peb saib qee cov ntsiab lus ntawm lub khob cua kub kev cai sensor.
Lub khob cua kub ceev sensor yog ib qho cua ceev ceev sensor, uas yog thawj zaug tsim los ntawm Robinson hauv tebchaws Askiv. Nyob rau hauv Suav teb, lub khob cua kub ceev sensor tau dav siv. Qhov kev nkag siab ntawm lub khob cua kub cua ceev sensor yog tsim los ntawm peb lossis plaub lub khob conical lossis hemispherical khoob khob. Lub plhaub khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob. Lub concave nto ntawm lub khob yog teem nyob rau hauv ib qho kev taw qhia, thiab tag nrho tus ntoo khaub lig-arm ncej yog tsau rau ntawm ib tug ntsug axis.
Thaum cua tshuab los ntawm sab laug, lub khob cua 1 yog sib npaug rau cov cua kev taw qhia, thiab lub zog tivthaiv ntawm lub siab ntawm cua ntawm lub khob cua 1 nyob rau hauv cov kev taw qhia feem ntau perpendicular mus rau lub khob cua axis yog kwv yees li xoom. Cua khob 2 thiab 3 sib tshuam nrog cua kev taw qhia ntawm lub kaum sab xis ntawm 60 degrees. Rau cua khob 2, nws qhov chaw concave ntsib cua thiab dais cua loj tshaj plaws; cua khob 3 muaj qhov convex nto tig rau cua, thiab cua nyob ib puag ncig nws ua rau cua siab me dua li lub khob cua 2. Vim yog qhov sib txawv ntawm lub khob cua 2 thiab cua khob 3 nyob rau hauv cov kev taw qhia perpendicular mus rau lub axis ntawm lub cua khob, lub khob cua pib tig clockwise.
Tom qab lub khob cua pib tig, vim hais tias lub khob 2 tig raws cua kev taw qhia, lub siab ntawm cov cua yuav txo qis, thaum lub khob 3 tig tawm tsam cua ntawm tib qhov ceev, cua siab nce kuj, thiab cua siab sib txawv. nce zuj zus. Tom qab ib ntus (cua nrawm nrawm), thaum qhov sib txawv ntawm qhov sib txawv ntawm peb lub khob cua yog xoom, lub khob cua yuav tig ntawm qhov sib txawv. Ua li no, cua ceev tuaj yeem txiav txim siab raws li qhov ceev ntawm lub khob cua (revolutions per second).
Thaum lub khob cua tig, nws tsav lub coaxial multi-tooth txiav disc los yog sib nqus pas nrig tig, thiab tau txais lub teeb liab mem tes proportional rau qhov ceev ntawm lub khob cua los ntawm lub voj voog. Lub teeb liab mem tes yog suav los ntawm lub txee, thiab qhov tseeb cua ceev tus nqi tuaj yeem tau txais tom qab hloov dua siab tshiab. Tam sim no, tus tshiab rotor anemometer siv peb khob, thiab kev ua tau zoo ntawm lub khob conical yog zoo dua li ntawm hemispherical. Thaum cua nrawm nce, lub rotor tuaj yeem ua kom nrawm nrawm kom phim cov cua nrawm. Thaum cua ceev txo qis, vim yog lub zog ntawm inertia, cua ceev yuav tsis poob tam sim ntawd. Rotary anemometers feem ntau qhia tias muaj cua kub ceev heev hauv cov cua daj cua dub thiab muaj qhov cuam tshuam loj heev (ua rau qhov yuam kev nruab nrab ntawm li 10 feem pua).
