Hais txog kev faib tawm thiab ntsuas txoj cai ntawm txheej thickness gauges
Lub npog txheej tsim rau ntawm qhov chaw tiv thaiv thiab kho kom zoo nkauj ntawm cov ntaub ntawv, xws li txheej, plating, txheej, nplaum txheej, chemically generated zaj duab xis, thiab lwm yam, yog hu ua txheej hauv cov teb chaws thiab cov qauv.
Cov txheej thickness ntsuas tau dhau los ua ib feem tseem ceeb ntawm kev soj ntsuam zoo ntawm kev lag luam kev lag luam thiab nto engineering, thiab nws yog qhov zoo tshaj plaws txhais tau tias rau cov khoom kom ncav cuag tus qauv zoo. Txhawm rau ua cov khoom lag luam rau hauv cov khoom lag luam, kuv lub teb chaws cov khoom lag luam xa tawm thiab cov haujlwm txawv teb chaws muaj cov kev xav tau meej rau cov thickness ntawm cov cladding.
Kev ntsuas cov txheej txheem ntawm txheej thickness mas muaj xws li: wedge txiav txoj kev, optical interception txoj kev, electrolysis txoj kev, thickness txawv ntsuas txoj kev, hnyav txoj kev, X-ray fluorescence txoj kev, -ray backscattering txoj kev, capacitance txoj kev, magnetic ntsuas txoj kev thiab eddy tam sim no ntsuas. kev cai lij choj, thiab lwm yam. Thawj tsib txoj hauv kev no yog kev kuaj kev puas tsuaj, kev ntsuas kev ntsuas yog cumbersome thiab ceev yog qeeb, thiab lawv feem ntau haum rau kev kuaj xyuas.
X-ray thiab beta-ray txoj kev yog cov kev ntsuas tsis sib cuag thiab tsis muaj kev puas tsuaj, tab sis cov cuab yeej siv tau yooj yim thiab kim, thiab qhov ntsuas qhov ntsuas me me. Vim muaj cov khoom siv hluav taws xob, cov neeg siv yuav tsum ua raws li cov cai tiv thaiv hluav taws xob. X-ray txoj kev tuaj yeem ntsuas ultra-thin txheej, ob txheej txheej thiab txheej txheej alloy. Txoj kev -ray yog tsim rau kev ntsuas ntawm cov txheej txheej thiab cov substrates nrog atomic tooj ntau dua 3. Txoj kev capacitance tsuas yog siv thaum ntsuas lub thickness ntawm insulating coatings ntawm nyias conductors.
Nrog rau kev nce qib ntawm thev naus laus zis, tshwj xeeb tshaj yog tom qab kev taw qhia ntawm microcomputer technology nyob rau hauv xyoo tas los no, lub thickness gauge siv magnetic method thiab eddy tam sim no txoj kev tau coj ib kauj ruam mus rau pem hauv ntej ntawm cov kev taw qhia ntawm miniaturization, txawj ntse, multi-function, high precision thiab practicality. Qhov kev daws teeb meem ntawm qhov ntsuas tau mus txog 0.1 micron, thiab qhov tseeb tuaj yeem ncav cuag 1 feem pua, uas tau txhim kho zoo heev. Nws muaj ntau yam kev siv, kev ntsuas dav dav, kev ua haujlwm yooj yim thiab tus nqi qis, thiab yog cov cuab yeej siv dav dav dav hauv kev lag luam thiab kev tshawb fawb.
Txoj kev tsis muaj kev puas tsuaj tsis ua rau cov txheej txheem los yog lub substrate puas, qhov kev tshawb nrhiav ceev ceev, thiab ntau qhov kev tshawb nrhiav kev ua haujlwm tuaj yeem ua rau kev lag luam.
【Principle of Magnetic Induction Measurement】
Thaum siv lub hauv paus ntsiab lus ntawm kev sib nqus induction, lub thickness ntawm txheej yog ntsuas los ntawm qhov loj ntawm cov hlau nplaum flux ntws mus rau hauv ferromagnetic substrate los ntawm kev sojntsuam los ntawm cov txheej txheem uas tsis yog-ferromagnetic. Qhov loj ntawm qhov sib thooj magnetoresistance kuj tuaj yeem ntsuas los qhia qhov tuab ntawm txheej. Qhov tuab ntawm txheej, qhov loj dua qhov magnetoresistance thiab qhov me me ntawm cov hlau nplaum. 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 conductive txheej ntawm cov hlau nplaum conductive substrate. Feem ntau, qhov sib nqus permeability ntawm lub substrate yuav tsum siab tshaj 500. Yog hais tias cov khoom siv cladding tseem sib nqus, qhov sib txawv ntawm permeability los ntawm cov khoom siv hauv paus yuav tsum loj txaus (xws li npib tsib xee plating ntawm hlau). Thaum qhov kev sojntsuam nrog lub kauj ntawm cov tub ntxhais mos yog muab tso rau ntawm cov qauv mus kuaj, qhov ntsuas tau txiav tawm qhov ntsuas tam sim no lossis kuaj teeb liab. Cov khoom lag luam thaum ntxov siv lub ntsuas ntsuas ntsuas ntsuas qhov ntsuas qhov loj ntawm qhov induced electromotive quab yuam, thiab cov cuab yeej ua kom pom tseeb ntawm cov teeb liab thiab tom qab ntawd qhia qhov tuab ntawm txheej. Nyob rau hauv xyoo tas los no, kev tsim hluav taws xob hauv Circuit Court tau qhia txog cov thev naus laus zis tshiab xws li kev ruaj khov, theem ntsuas, ntsuas kub, thiab lwm yam, thiab siv magnetoresistance los hloov cov teeb liab ntsuas. Cov tsim kev sib xyaw ua ke kuj tseem siv tau thiab siv lub tshuab 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 kev daws teeb meem txog li 0.1um, qhov tso cai yuam kev yog mus txog 1 feem pua, thiab qhov ntau yog mus txog 10mm.
Lub hauv paus ntsiab lus sib nqus tuab tuaj yeem siv los ntsuas cov xim txheej ntawm cov hlau nto, txheej tiv thaiv ntawm cov plooj (porcelain) thiab enamel, txheej ntawm cov yas thiab roj hmab, txheej txheej electroplating ntawm ntau yam hlau tsis muaj hlau xws li nickel-chromium, thiab ntau yam. anti-corrosion txheej ntawm chemical thiab roj av industries. .
【Principle of Eddy Tam sim no ntsuas】
Lub high-frequency AC teeb liab generates ib qho electromagnetic teb nyob rau hauv lub sojntsuam kauj, thiab eddy tam sim no tsim nyob rau hauv tus neeg xyuas pib raws li qhov kev sojntsuam mus txog. 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. Vim tias cov kev sojntsuam no tau tsim los ntsuas qhov tuab ntawm cov txheej txheem ntawm cov hlau tsis yog 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 kev sib nqus induction, qhov sib txawv tseem ceeb yog qhov kev sojntsuam sib txawv, qhov zaus ntawm lub teeb liab sib txawv, thiab qhov loj thiab qhov sib txawv ntawm cov teeb liab sib txawv. Zoo li cov hlau nplaum induction thickness gauge, lub eddy tam sim no thickness gauge kuj ua tau ib tug siab daws teeb meem ntawm 0.1um, ib tug tso cai yuam kev ntawm 1 feem pua, thiab ib tug ntau ntawm 10 hli.
Lub thickness gauge siv lub eddy tam sim no txoj cai yuav ntsuas tsis-conductor coatings rau tag nrho cov conductors nyob rau hauv txoj cai, xws li xim rau saum npoo ntawm aerospace aircraft, tsheb, khoom siv hauv tsev, aluminium alloy qhov rooj thiab qhov rais thiab lwm yam khoom txhuas, yas coatings thiab Anodized zaj duab xis. . Cov khoom siv cladding muaj qee yam conductivity, uas 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 cov hlau matrix kuj yog ib qho hluav taws xob conductor, nws yog qhov tsim nyog los siv lub hauv paus ntsiab lus sib nqus los ntsuas cov haujlwm no.
