Lub cev muaj peev xwm yog dab tsi?

Zoo li qee yam ntawm cov ntsuas (piv txwv li, cov ntsuas ntawm sab hauv), lub peev xwm muaj peev xwm ua haujlwm tsis muaj lub cev sib chwv nrog cov khoom hauv qhov kev tshawb nrhiav. Hauv lwm lo lus, cov hom ntawm cov ntsuas no tsis yog sib txuas ntawm cov khoom siv. Nrog lawv cov kev pab, ob qho tib si siv hluav taws xob thiab cov khoom siv uas tsis yog khoom siv tau tuaj yeem tshawb pom. Vim tias yog cov cuab yeej no, lub peev xwm muaj peev xwm siv tau rau hauv cov chaw uas, piv txwv li, cov khoom siv hluav taws xob tsis haum.

Dab tsi yog lub ntsuas tau capacitive, nws cov qauv thiab hom kev ua haujlwm

Qhov ntsuas no tsis yooj yim heev uas yog lub cuab yeej thiab feem ntau muaj:

Tej ntawm

Lub cev ua rau nws muaj peev xwm khaws txhua yam hauv ua ke ib qho. Tsis tas li ntawd, nws muaj kev tiv thaiv kev tiv thaiv ntawm cov ntsiab los ntawm lwm qhov xwm txheej uas yuav cuam tshuam nws txoj kev ua tau zoo. Lub cev ntawm lub zog capacitive sensor feem ntau yog ua los ntawm tooj dag lossis polyamide.

Khoom Txuas

Nws yog cov kua roj tshwj xeeb uas tiv thaiv cov pa hluav taws xob los ntawm ya raws lossis lwm yam khoom tsis zoo.

Ua rau

Tus ntsuas tsim tawm qhov yuav tsum tau hloov lub teeb liab lub zog thiab cov nyiaj hysteresis (qhov no yog qhov sib txawv hauv qhov kev ncua deb ua ntej hloov mus).

LEDs

LEDs muab kev teeb tsa nrawm thiab taw qhia txoj haujlwm hloov chaw.

Amplifier

Amplifies teeb liab tawm mus rau qhov xav tau tus nqi.

Neej Neeg Dab

Tus demodulator hloov lub siab hloov kho qhov oscillations kom txog rau thaum hloov hluav taws xob.

Lub tshuab hluav taws xob

Nws tsim hluav taws xob teb uas ua haujlwm ntawm cov khoom.

Hluav Taws Xob

Cov nplaim ua haujlwm ntawm lub ntsuas hluav taws xob muaj peev xwm feem ntau yog ob lub tshuab hluav taws xob uas ua raws li daim hlau capacitor uas txuas nrog lub tshuab hluav taws xob tawm ntawm lub voj. Nws, nyeg, tau teeb tsa kom hloov nws lub hwj chim thaum nws mus txog qhov khoom raug tswj hwm.

Raws li cov kev co no, raws li lub suab txuas mus rau ib qho khoom, lub tshuab hluav taws xob ua kom nrov nrov zuj zus, uas tau ua tiav thiab tsim cov paib tawm suab.

Capacitive sensors tau tsav los ntawm cov khoom siv hluav taws xob uas muaj hluav taws xob zoo thiab cov qauv ntsuas. Raws li qhov khoom kwv yees mus kom ze, qhov kev nkag siab nyob deb li cas ntau dua thaum ntsuas cov khoom yog dielectrics (qhov deb ntawm qhov kwv yees nyob ntawm dielectric tas mus li).

Siv
Kev siv ntawm cov sensors ntawm hom no yog qhov muaj peev xwm thiab ntau yam. Lawv tau dav siv hauv cov txheej txheem tswj kev lag luam hauv yuav luag txhua qhov kev lag luam.

Lawv siv rau hauv cov nres tsheb nres tsheb thiab tswj kev txhaws ntawm tso tsheb hlau luam nrog kua, qhov loj thiab gaseous tshuaj, rau kev hloov ntawm cov kab tsis siv neeg, rau lub tshuab chaw, tshuab, conveyors, lub tswb thiab lwm yam.

Hom ntawm capacitive sensors thiab lawv cov kev siv

Daws teeb meem sensors

Tam sim no, ib qho ntawm kev siv lub peev xwm tshwj xeeb tshaj yog muaj qhov sib thooj sensors, uas, ntxiv rau kev ntseeg siab, muaj qhov zoo heev ntawm qhov zoo.

Cov ntsuas ntawm hom no yog siv nyob rau hauv yuav luag txhua thaj chaw raws li lawv cov nqi tsim nyog. Lawv siv los soj ntsuam theem kev puv ntawm ntau lub ntim, tswj voltage, kom teeb liab thaum muaj teeb meem ntawm cov kab ntau lawm thiab lwm yam.

Peev xwm encoders rau ncig thiab angar

Cov ntsuas ntawm hom no yog siv rau hauv kev lag luam xws li kev siv tshuab, lub zog, thauj, kev tsim kho thiab lwm yam.

Inclinometers

Capacitive inclinometers siv nyob rau hauv cov roj hauv cov qib kev lag luam, los txiav txim siab deformation ntawm kev txhawb nqa, saib xyuas thiab tswj txoj kab nqes ntawm txoj kev thiab kev tsheb nqaj hlau thaum lawv siv, los txiav txim siab qhov zoo ntawm lub tsheb, nkoj, nce tsheb, nqa khoom, khoom siv ua liaj ua teb kom txiav txim siab lub kaum kev hloov ntawm cov khoom sib hloov, xws li raws li cov shafts, zog thiab cov tshuab, ob qho tib si ruaj ruaj thiab txav tau.

Capacitive qib sensors

Cov ntsuas ntawm hom no yog siv rau hauv kev soj ntsuam xyuas, kev tswj hwm thiab tswj cov txheej txheem hauv cov zaub mov, chaw muag tshuaj, tshuaj lom neeg thiab roj av.

Lawv ua tau zoo tshaj plaws hauv kev kov cov kua, cov khoom loj, cov khoom khov thiab tsis coj ua, thiab hauv cov chaw ua haujlwm hnyav hauv chav lossis chaw uas muaj plua plav lossis hws tawm.

Capacitive sensors yog siv dav hauv kev lag luam uas ntsuas qhov tseeb ntawm tag nrho lub siab, tuab ntawm cov ntaub ntawv dielectric, cov av noo, qhov txiav thiab txoj cai ntawm lub kaum, thiab lwm yam yog qhov yuav tsum tau ua.

Kev faib tawm ntawm cov ntsuas hluav taws xob haum raws li tus txheej txheem ntawm lawv kev siv

Txhua hom kev haum xeeb muaj peev xwm raug faib ua ob pawg: cov ntsuas hluav taws xob nrog ib thiab ob lub tso tsheb hlau luam. Cov tom kawg tau muab faib ntxiv ua cov tsis sib luag thiab ib nrab hnub.

Cov khoom siv hluav taws xob ib leeg muaj cov qauv tsim yooj yim thiab yog cov ntsuas hluav taws xob. Hom kev ntsuas no muaj ob peb qhov tsis zoo, uas suav qhov tseem ceeb ntawm ib puag ncig xws li cov av noo thiab kub.

Qhov tsis zoo ntawm lub zog nrog lub ntsej muag txawv yog qhov txawv ntawm cov sensors nrog ib lub peev xwm, thiab qhov sib txawv tau tsawg kawg peb yam khoom siv sib txuas ntawm lub ntsuas thiab ntsuas ntsuas kom nruab nrab cov kev tsis zoo ntawm av noo thiab kub.

Txawm li cas los xij, vim muaj qhov tsis zoo me me no, cov tsis sib xws sensors nce ntau qhov raug thiab ruaj khov thiab yog li nthuav lawv daim teb ntawm daim ntawv thov.

Pros ntawm capacitive sensors
Piv nrog rau kev sib tw kho qhov muag, qhov inductive thiab piezoelectric sensors, lub peev xwm muaj peev xwm muaj ntau qhov zoo, suav nrog:

• yooj yim ntawm kev tsim khoom - cov ntaub ntawv pheej yig yog siv rau kev tsim cov capacitive sensors, uas cuam tshuam rau tus nqi kawg ntawm cov khoom;
• qhov loj me thiab qhov hnyav;
• kev siv hluav taws xob qis;
• high degree ntawm rhiab heev;
• tsis sib cuag (lawv tsis tas yuav nyob ze qhov khoom ntawm kev kawm;
• kev ua haujlwm ntev;

Kev hloov kho tau yooj yim ntawm lub ntsuas tsim rau cov haujlwm thiab cov ntsuas sib txawv.

Disadvantages
Qee qhov kev cuam tshuam loj tshaj ntawm cov ntsuas tsis haum:

• tus nqi me me ntawm kev hloov pauv (hloov chaw);
• qhov xav tau los ua haujlwm ntawm qhov zaus siab tshaj 50 Hz;
• kev ua tau zoo tuaj yeem cuam tshuam los ntawm hmoov av thiab noo noo, thiab lub sensor tuaj yeem kuaj ntsuas tsis raug;
• kub rhiab.

Capacitive sensors yog cov qauv yooj yim, uas ua rau cov khoom siv ruaj khov thiab txhim khu kev qha. Qhov txwv ntawm tus capacitor tsuas yog nyob ntawm nws tus yam ntxwv thiab tsis vam khom rau cov yam ntxwv ntawm cov khoom siv, yog tias lawv raug xaiv.

Qhov teeb meem ntawm lawv cov kev nkag siab mus rau qhov kub thiab txias tuaj yeem daws tau los ntawm kev xaiv cov khoom tsim nyog rau lub paib thiab lub rwb thaiv tsev tsim nyog rau lawv lub cev ceev. Nws tshua tsuas yog txhim kho lawv cov kev tiv thaiv tiv thaiv cov teeb meem ntawm cov hmoov av, noo noo thiab ion hluav taws xob, thiab hom sensors no yuav muaj kev siv ntau dua.

Thiab thaum kawg, peb tuaj yeem sau lub ntsiab lus ...

Capacitive sensors siv cov cuab yeej siv zog me me uas lawv yuav tsum tau txav qhov txav mus los, kho qhov tso zis ntawm lub kaw lus thiab ua haujlwm nrog qhov raug siab. Tag nrho cov no ua rau cov sensors tsis tseem ceeb rau kev ntsuas qhov tseeb ntawm cov khoom siv hluav taws xob thiab cov khoom tsis zoo.

Cov Lus Nug thiab Cov Lus Teb:

Dab tsi yog capacitive sensors? Ib leeg-capacitive, ob-capacitive. Nyob rau hauv lem, lawv muab faib ua: linear, angular, inclinometers, theem sensors, siab transducers.

Dab tsi yog capacitive sensors npaj rau thiab lawv ua haujlwm li cas? Nyob rau hauv xws li sensors, ntsuas parameter hloov, vim hais tias cov kuj hloov. Xws li sensors yog siv los hloov cov nqi ntawm cov av noo, siab, mechanical force, thiab lwm yam.

Lub capacitive qib sensor ua haujlwm li cas? Nyob rau hauv xws li ib tug sensor, vim hais tias ntawm ib tug hloov nyob rau hauv lub ntsuas theem, lub capacitance ntawm lub capacitor kuj hloov (nws yog tsim los ntawm kev sojntsuam thiab cov phab ntsa ntawm lub reservoir - cov kua ntau nyob rau hauv lub reservoir, lub peev xwm ntau dua).