Feem ntau siv cov txheej txheem rau txheej thickness gauges
1. Sib nqus quab yuam ntsuas txoj cai thiab txheej thickness gauge
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Lub zog nqus ntawm cov hlau nplaum (kev sojntsuam) thiab cov hlau nplaum sib nqus yog proportional rau qhov kev ncua deb ntawm ob, thiab qhov kev ncua deb no yog lub thickness ntawm cladding. Siv lub hauv paus ntsiab lus no los ua ib lub thickness gauge, tsuav yog qhov sib txawv ntawm qhov sib nqus permeability ntawm cov txheej thiab cov khoom siv hauv paus loj txaus, nws tuaj yeem ntsuas tau. Raws li qhov tseeb tias feem ntau cov khoom lag luam raug stamped thiab tsim los ntawm cov qauv hlau thiab cov ntawv kub dov txias-kuav los tiag steel daim hlau, cov hlau nplaum thickness gauges yog siv dav tshaj plaws. Lub hauv paus qauv ntawm lub thickness gauge yog tsim los ntawm hlau nplaum, relay caij nplooj ntoos hlav, nplai thiab nws tus kheej-stop mechanism. Tom qab cov hlau nplaum yog nyiam rau cov khoom ntsuas, ntsuas lub caij nplooj ntoos hlav yog maj mam elongated tom qab ntawd, thiab lub zog rub tau maj mam nce. Thaum lub zog rub tsuas yog ntau dua li lub zog nqus, lub thickness ntawm txheej tuaj yeem tau txais los ntawm kev sau lub zog rub lub sijhawm thaum cov hlau nplaum sib nqus. Cov khoom lag luam tshiab tuaj yeem ua cov txheej txheem kaw cia. Cov qauv sib txawv muaj ntau yam sib txawv thiab siv sijhawm.
Cov cuab yeej no yog tus cwj pwm los ntawm kev ua haujlwm yooj yim, ua haujlwm ntev, tsis muaj hluav taws xob, tsis muaj calibration ua ntej ntsuas, thiab tus nqi qis. Nws yog qhov tsim nyog rau kev tswj xyuas qhov zoo ntawm qhov chaw hauv kev cob qhia.
2. Sib nqus induction ntsuas txoj cai
Thaum lub hauv paus ntsiab lus ntawm magnetic induction yog siv, lub thickness ntawm txheej yog ntsuas los ntawm qhov loj ntawm cov hlau nplaum flux ntws los ntawm kev sojntsuam los ntawm cov non-ferromagnetic txheej rau hauv ferromagnetic substrate. Qhov loj ntawm qhov sib thooj magnetoresistance kuj tuaj yeem ntsuas los qhia qhov tuab ntawm txheej. Lub thicker lub txheej, ntau dua qhov tsis kam thiab qhov me me ntawm cov flux. Lub thickness gauge siv lub hauv paus ntsiab lus ntawm magnetic induction nyob rau hauv lub hauv paus ntsiab lus muaj lub thickness ntawm cov hlau nplaum txheej ntawm cov hlau nplaum substrate. Feem ntau, qhov sib nqus permeability ntawm lub substrate yuav tsum siab tshaj 500. Yog hais tias cov ntaub ntawv cladding kuj yog sib nqus, qhov sib txawv ntawm permeability los ntawm cov khoom siv hauv paus yuav tsum muaj qhov loj txaus (xws li npib tsib xee plating ntawm cov hlau). Thaum qhov kev sojntsuam nrog lub kauj qhov txhab ntawm cov tub ntxhais mos yog muab tso rau ntawm cov qauv mus kuaj, qhov ntsuas yuav cia li tso tawm qhov ntsuas tam sim no lossis kuaj teeb liab. Cov khoom lag luam thaum ntxov siv lub ntsuas ntsuas ntsuas ntsuas qhov loj ntawm qhov induced electromotive quab yuam, thiab qhov ntsuas tau nthuav tawm cov teeb liab los qhia cov txheej tuab. Nyob rau hauv xyoo tas los no, kev tsim hluav taws xob hluav taws xob tau qhia txog cov thev naus laus zis tshiab xws li kev ruaj ntseg zaus, lub sij hawm kaw, thiab qhov kub thiab txias, thiab siv cov hlau nplaum tiv thaiv rau kev ntsuas ntsuas ntsuas. Nws kuj tau txais kev tsim qauv tshiab kev sib xyaw ua ke thiab nthuav qhia lub microcomputer, kom qhov ntsuas qhov tseeb thiab kev tsim tawm tau zoo dua qub (yuav luag qhov kev txiav txim ntawm qhov loj). Niaj hnub nimno magnetic induction thickness gauge muaj ib tug daws teeb meem ntawm 0.1um, ib tug tso cai yuam kev ntawm 1 feem pua, thiab ib tug ntau ntawm 10 hli.
Lub hauv paus ntsiab lus sib nqus tuab tuaj yeem siv los ntsuas cov xim txheej ntawm cov hlau nto, plooj (porcelain, enamel tiv thaiv txheej), yas, roj hmab txheej, ntau yam tsis-ferrous hlau plating txheej xws li npib tsib xee thiab chromium, thiab ntau yam kev tiv thaiv corrosion rau tshuaj roj. kev lag luam.
3. Eddy txoj cai ntsuas tam sim no
Lub high-frequency AC teeb liab generates ib tug electromagnetic teb nyob rau hauv lub sojntsuam kauj, thiab thaum lub sojntsuam nyob ze rau tus neeg xyuas pib, eddy tam sim no yog tsim nyob rau hauv nws. Qhov ze ntawm qhov kev sojntsuam yog mus rau qhov conductive substrate, qhov ntau dua qhov eddy tam sim no thiab ntau dua qhov kev xav impedance. Qhov kev tawm tswv yim no qhia txog qhov kev ncua deb ntawm qhov kev sojntsuam thiab cov khoom siv hluav taws xob, uas yog, lub thickness ntawm cov txheej txheem uas tsis yog-conductive ntawm lub conductive substrate. Txij li cov kev sojntsuam no tshwj xeeb hauv kev ntsuas qhov tuab ntawm cov txheej txheem ntawm cov hlau tsis-ferromagnetic substrates, lawv feem ntau hu ua non-magnetic probes. Cov kev sojntsuam tsis sib nqus siv cov khoom siv ntau zaus ua cov coil cores, xws li platinum-nickel alloys lossis lwm yam khoom tshiab. Piv nrog rau lub hauv paus ntsiab lus ntawm magnetic induction, qhov sib txawv tseem ceeb yog qhov kev sojntsuam sib txawv, qhov zaus ntawm lub teeb liab sib txawv, qhov loj thiab qhov sib txawv ntawm cov teeb liab sib txawv. Zoo li cov hlau nplaum induction thickness gauge, eddy tam sim no thickness gauge kuj tau mus txog ib theem siab ntawm kev daws teeb meem ntawm 0.1um, tso cai yuam kev ntawm 1 feem pua, thiab ntau yam ntawm 10mm.
Lub thickness gauge siv lub hauv paus ntsiab lus ntawm eddy tam sim no nyob rau hauv lub hauv paus ntsiab lus ntsuas cov non-conductive txheej ntawm tag nrho cov hluav taws xob conductors, xws li cov nto ntawm aerospace tsheb, tsheb, khoom siv hauv tsev, aluminium alloy qhov rooj thiab qhov rais, thiab lwm yam khoom txhuas. Anodized zaj duab xis. Cov khoom siv cladding muaj qee yam conductivity, thiab nws kuj tuaj yeem ntsuas los ntawm calibration, tab sis qhov piv ntawm cov conductivity ntawm ob yuav tsum muaj tsawg kawg yog 3-5 zaus sib txawv (xws li chrome plating ntawm tooj liab). Txawm hais tias steel substrates tseem yog cov khoom siv hluav taws xob, cov qauv hlau nplaum yog tsim nyog rau hom haujlwm no.
