Thaum lub sij hawm vuam txheej txheem rauultrasonic vuam, hluav taws xob teeb liab tawm tswv yim rau lub acoustic system hloov sai sai, thiab qhov kev hloov pauv ntau zaus yog qhov dav.Txhawm rau txhim kho qhov ntsuas nrawm thiab qhov tseeb, thawj zaug, kev ntsuas raug coj los xaiv cov nti nrog cov lus teb ceev ceev, thiab lub sijhawm tsis tu ncua ntawm cov khoom siv thiab cov lim txuas ntawm cov khoom siv hluav taws xob ntawm lub nti yog tswj kom tsawg dua 0.2 ms. , yog li txhawm rau kom ntseeg tau tias tag nrho lub sijhawm teb ntawm lub kaw lus tsawg dua 2 ms, thiab ua tau raws li qhov xav tau ntawm kev kuaj xyuas cov teeb liab hloov hluav taws xob sai.Txhawm rau kom ntseeg tau tias qhov yuav tsum tau muaj ntawm qhov dav zaus band amplitude thiab zaus cov yam ntxwv ntawm lub cev, RCK hom resistor nrog siab precision thiab siab stability yog xaiv, uas muaj tsawg kawg nkaus parasitic inductance thiab capacitance.Op-amp Cheebtsam yuav tsum tau xaiv nrog qhib-voj magnification ntawm ntau tshaj 10 thiab kaw-voj magnification ntawm tsawg tshaj li 10. Nyob rau hauv no txoj kev, ib tug ca amplitude-zaus nkhaus yuav tau los ntawm 0 ~ 20 kHz ± 3 kHz.Hauv qab no yog cov lus piav qhia luv luv ntawm txhua qhov kev ua haujlwm module.
1.1 Kev ntsuas ntawm Vrms ntawm voltage RMS
Cov cuab yeej kuaj tau tsim nyob rau hauv daim ntawv no tuaj yeem ntsuas qhov hluav taws xob sinusoidal voltage nrog kev cuam tshuam nrog RMS ntawm 0 ~ 1 000 V thiab zaus ntawm 20 kHz ± 3 kHz.Lub input voltage yog muab rho tawm los ntawm lub teeb liab, tus nqi RMS hloov dua siab tshiab rau AC / DC, thiab ces proportionally hloov mus rau hauv ob qhov tso zis raws.Ib qho channel yog nkag mus rau 3-ntsis semi-digital meter taub hau ntawm lub vaj huam sib luag pem hauv ntej ntawm lub tester, uas ncaj qha qhia RMS tus nqi ntawm 0-1 000 V voltage.Lwm qhov tso tawm 0 ~ 10 V analog voltage teeb liab los ntawm lub vaj huam sib luag tom qab ntawm lub tester rau cov ntaub ntawv tau txais thiab tsom xam los ntawm lub computer.
Lub teeb liab hluav taws xob tuaj yeem raug rho tawm los ntawm voltage transformer, Hall element sensor lossis photoelectric hloov dua siab tshiab.Cov txheej txheem no
Txawm hais tias qhov kev sib cais yog qhov zoo, nws yuav tsim qhov sib txawv ntawm waveform distortion thiab ntxiv theem hloov mus rau 20 kHz hluav taws xob teeb liab, uas ua rau nws nyuaj los xyuas kom meej qhov tseeb ntawm lub zog ntsuas thiab theem lub kaum sab xis ntsuas.Cov kab lus no siv cov khoom lag luam sib luag rau cov teeb liab kev ua haujlwm, lub amplifier input tsis kam siv 5. 1 M Ψ, qhov nam no tuaj yeem ua rau lub teeb liab input attenuation, kev kub siab tiv thaiv rau cov circuits tom ntej, thiab raws li qhov tshwm sim ntawm amplifier input impedance deb tshaj qhov teeb liab qhov tsis kam ntawm ultrasonic generator, ultrasonic generator ua hauj lwm raws li txoj cai tsis muaj kev cuam tshuam.
AD637 yog siv rau kev ntsuas voltage RMS.Nws yog AC-DC RMS converter nrog high upconversion raug thiab dav zaus band, thiab kev hloov dua siab tshiab yog ywj siab ntawm lub waveform.Nws yog qhov tseeb RMS converter.Qhov yuam kev siab tshaj plaws yog li 1%.Thaum lub waveform factor yog 1 ~ 2, tsis muaj qhov yuam kev ntxiv.
1.2 Kev ntsuas tus nqi tam sim no
Tam sim no RMS nrhiav pom Circuit Court tsim nyob rau hauv daim ntawv no tuaj yeem ntes cov teeb liab tam sim no nrog sinusoidal distortion ntawm 0 ~ 2 A, 20 kHz ± 3 kHz.Los ntawm kev siv tus qauv qauv kev tiv thaiv txuas nrog hauv koob rau lub voj voog ntawm lub tshuab hluav taws xob ultrasonic hauv FIG.1, tam sim no yog thawj zaug hloov dua siab tshiab rau hauv voltage teeb liab proportional rau nws.Txij li cov qauv kev ua haujlwm yog ib qho khoom siv dawb huv, nws yuav tsis coj cov kev hloov pauv tam sim no lossis hloov theem ntxiv, thiaj li ua kom qhov ntsuas qhov tseeb.Lub teeb liab voltage proportional rau tam sim no yog hloov dua siab tshiab rau hauv analog voltage teeb liab los ntawm RMS AC-DC converter AD637, uas yog tso zis rau digital meter taub hau thiab lub computer nyob rau hauv ob txoj kev.Lub hauv paus ntsiab lus ntawm kev hloov pauv yog tib yam li ntawm RMS voltage hloov dua siab tshiab.
1.3 Kev ntsuas lub zog ua haujlwm
Lub zog ntsuas hluav taws xob ntsuas hluav taws xob los ntawm qhov hluav taws xob attenuated thiab I / V hloov teeb liab nyob rau hauv RMS ntsuas module ntawm voltage thiab tam sim no.Lub hauv paus ntawm lub zog ntsuas module yog AD534 analog multiplier thiab lim circuit.Tom qab qhov hluav taws xob tam sim no tau muab faib los ntawm cov khoom siv tam sim no, cov khoom siv hluav taws xob siab tau lim tawm kom tau txais lub zog tiag tiag.
1. 4 Kev ntsuas theem sib txawv ntawm qhov tam sim no thiab voltage
Cov theem sib txawv ntawm cov input voltage thiab tam sim no ntawm lub ultrasonic transducer yog ntsuas los ntawm shaping lub input voltage thiab tam sim no cov teeb liab mus rau hauv square vuag los ntawm ib tug xoom-hla sib piv, thiab ces synthesizing lub theem sib txawv los ntawm XOR logic ua.Vim tias tsis yog theem sib txawv ntawm qhov hluav taws xob thiab qhov tam sim no, tab sis kuj tseem muaj qhov sib txawv ntawm cov hlau lead thiab lag luam, Ming Yang kuj tau tsim ib lub sij hawm luv luv los txheeb xyuas cov hlau lead thiab lag luam kev sib raug zoo.Yog tias koj muaj kev xav tau thov hu rau peb.
1.5 Kev ntsuas zaus
Kev ntsuas zaus module txais ib lub nti microcomputer 8051, siv tus qauv siv lead ua zaus, siv lead ua mem tes teeb liab suav nyob rau hauv qee lub sijhawm teeb liab, tuaj yeem pom tau hauv 1 ms, zaus yog 20 kHz, qhov yuam kev tsis ntau tshaj 2 Hz.Cov txiaj ntsig ntsuas zaus yog tso tawm los ntawm 16-ntsis binary lej, nkag mus rau lub khoos phis tawj I / O daim npav, thiab hloov mus rau tus lej lej tiag tiag los ntawm software programming.
Ultrasonic yas vuam yog ua tiav nyob rau hauv instantaneous thiab siab, thiab cov txheej txheem vuam qhia cov yam ntxwv ntawm ceev, complex, nyuaj thiab ntau parameter cuam tshuam.Thaum lub sij hawm thiab tom qab vuam, kev ntxhov siab thiab deformation ntau heev (welding residual deformation, vuam shrinkage, vuam warping) yuav raug tsim, thiab dynamic kev nyuaj siab thiab welding residual kev nyuaj siab generated nyob rau hauv lub vuam txheej txheem, tab sis kuj muaj feem xyuam rau lub deformation ntawm lub workpiece thiab vuam tsis xws luag.
Nws tseem cuam tshuam rau lub weldability ntawm cov qauv ua haujlwm thiab lub zog tawg tawg, qaug zog, lub zog tawm los, kev co yam ntxwv thiab lwm yam.Tshwj xeeb tshaj yog cuam tshuam rau vuam workpiece machining raug thiab seem stability.Qhov teeb meem ntawm welding thermal stress thiab deformation yog qhov nyuaj heev, tsis muaj kev pom, tsis tuaj yeem kwv yees thiab txheeb xyuas qhov cuam tshuam ntawm vuam ntawm cov khoom siv ntawm tag nrho cov welder, thiab ua tib zoo ntsuas qhov vuam zoo.Nyob rau tib lub sijhawm, ntau cov ntaub ntawv tseem ceeb, uas yog qhov cuam tshuam, tsis tuaj yeem ntsuas ncaj qha los ntawm cov qauv siv.
Peb yog cov kws tshaj lij R & D, ntau lawm, thiab muag khoom ntawmultrasonic vuam tshuab, high zaus welding tshuab, hlau vuam tshuab, Ultrasonic generatorHoobkas.Peb zoo siab los qhia peb cov kev txhawb nqa ultrasound thiab cov ntaub ntawv ultrasound.Yog tias koj muaj qhov project los sab laj, thov qhia peb cov khoom thiab qhov loj ntawm koj cov khoom.Peb yuav muab cov kev pab cuam ultrasonic vuam dawb rau koj.
Post lub sij hawm: Oct-20-2022