Magnetic force ntsuas txoj cai thiab thickness gauge
Lub zog quab yuam ntawm cov hlau nplaum (kev sojntsuam) thiab cov hlau nplaum permeable yog proportional rau qhov kev ncua deb ntawm ob. Qhov kev ncua deb no yog lub thickness ntawm txheej. Lub hauv paus ntsiab lus no yog siv los ua lub thickness gauge, uas tuaj yeem ntsuas tau ntev npaum li qhov sib txawv ntawm qhov sib nqus permeability ntawm cov txheej thiab cov khoom siv hauv paus loj txaus. Txij li feem ntau cov khoom lag luam raug stamped los ntawm cov qauv hlau thiab kub-kuav los tiag thiab txias-kuav los tiag steel daim hlau, magnetic thickness gauges yog siv dav tshaj plaws. Lub hauv paus qauv ntawm lub thickness gauge muaj hlau nplaum hlau, relay caij nplooj ntoos hlav, nplai thiab nws tus kheej-stop mechanism. Tom qab cov hlau nplaum yog attracted rau cov khoom yuav tsum tau ntsuas, lub ntsuas lub caij nplooj ntoos hlav yog maj stretched thiab lub rub quab yuam yog maj nce. Thaum lub zog rub tsuas yog ntau dua li lub zog nqus, lub thickness ntawm txheej tuaj yeem tau txais los ntawm kev kaw lub zog rub thaum lub sijhawm cov hlau nplaum raug tshem tawm. Cov khoom lag luam tshiab tuaj yeem ua cov txheej txheem kaw cia. Cov qauv sib txawv muaj qhov ntsuas sib txawv thiab siv sijhawm.
Cov yam ntxwv ntawm cov cuab yeej no yog tias nws yooj yim rau kev khiav lag luam, ruaj khov thiab ruaj khov, tsis xav tau lub zog hluav taws xob, tsis tas yuav calibration ua ntej ntsuas, thiab yog tus nqi qis. Nws yog qhov tsim nyog rau kev tswj xyuas qhov zoo ntawm qhov chaw hauv kev cob qhia.
Sib nqus induction ntsuas
Thaum siv lub hauv paus ntsiab lus ntawm magnetic induction, lub thickness ntawm txheej yog ntsuas los ntawm kev siv qhov loj ntawm cov hlau nplaum flux ntws los ntawm kev sojntsuam los ntawm cov txheej tsis-ferromagnetic thiab mus rau hauv ferromagnetic substrate. Cov sib nqus sib nqus kuj tseem tuaj yeem ntsuas los qhia cov txheej tuab. Lub thicker lub txheej, ntau dua qhov sib nqus tsis kam thiab qhov me me ntawm qhov sib nqus flux. Thickness gauges uas siv lub hauv paus ntsiab lus ntawm magnetic induction muaj peev xwm nyob rau hauv lub hauv paus ntsiab lus muaj lub thickness ntawm non-magnetic conductive coatings ntawm magnetic permeable substrates. Feem ntau, qhov sib nqus permeability ntawm cov khoom siv hauv paus yuav tsum siab dua 500. Yog hais tias cov ntaub ntawv txheej kuj yog sib nqus, qhov sib txawv ntawm cov hlau nplaum 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 nyob ib ncig ntawm cov tub ntxhais mos yog muab tso rau ntawm cov qauv uas tau sim, 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 cuam tshuam electromotive quab yuam. Qhov ntsuas tau nthuav dav lub teeb liab thiab tom qab ntawd qhia cov txheej tuab. 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 ua kom ruaj khov, theem ntsuas phoo, thiab qhov kub thiab txias, thiab magnetoresistance yog siv los hloov cov kev ntsuas ntsuas. Nws kuj tseem siv cov qauv kev sib xyaw ua ke thiab qhia txog microcomputers, uas txhim kho qhov ntsuas qhov tseeb thiab rov tsim dua tshiab (yuav luag los ntawm qhov kev txiav txim ntawm qhov loj). Niaj hnub nimno magnetic induction thickness gauges muaj kev daws teeb meem ntawm 0.1um, qhov kev tso cai yuam kev ntawm 1%, thiab ntsuas ntau ntawm 10 hli.
Lub hauv paus ntsiab lus sib nqus tuab tuaj yeem siv los ntsuas cov xim txheej ntawm cov hlau, txheej tiv thaiv ntawm cov plooj (porcelain) thiab enamel, cov yas thiab roj hmab txheej, ntau yam tsis-ferrous hlau plating txheej xws li npib tsib xee thiab chromium, thiab ntau yam kev tiv thaiv corrosion. coatings nyob rau hauv chemical thiab petroleum industries. .
Eddy ntsuas tam sim no
Lub high-frequency AC teeb liab generates 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 cuam tshuam impedance. Qhov kev tawm tswv yim no sawv cev rau 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 hom kev sojntsuam no tshwj xeeb tsim los ntsuas qhov tuab ntawm cov txheej txheem ntawm cov hlau tsis-ferromagnetic substrates, nws feem ntau hu ua kev sojntsuam tsis sib nqus. Cov kev sojntsuam tsis sib nqus siv cov khoom siv ntau zaus raws li cov tub ntxhais coil, xws li platinum-nickel alloy lossis lwm yam ntaub ntawv 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, eddy tam sim no thickness gauge kuj mus txog ib theem siab ntawm kev daws teeb meem ntawm 0.1um, tso cai yuam kev ntawm 1%, thiab ntsuas ntau yam ntawm 10mm.
Thickness gauges uas siv lub eddy tam sim no txoj cai yuav, nyob rau hauv lub hauv paus ntsiab lus, ntsuas tsis-conductive coatings rau tag nrho cov conductive lub cev, xws li xim, yas coatings rau saum npoo ntawm aerospace aircraft, tsheb, khoom siv hauv tsev, aluminium alloy qhov rooj thiab qhov rais, thiab lwm yam txhuas. cov khoom. Anodized zaj duab xis. Cov khoom siv cladding muaj qee yam conductivity, uas tuaj yeem ntsuas los ntawm calibration, tab sis qhov sib piv ntawm cov conductivities ntawm ob yuav tsum muaj tsawg kawg yog 3-5 zaus sib txawv (xws li chromium plating ntawm tooj liab). Txawm hais tias cov hlau matrix kuj yog tus neeg xyuas pib, nws yog qhov tsim nyog los siv cov qauv sib nqus ntsuas rau hom haujlwm no.
