Kev ceev faj tseem ceeb thaum siv ultrasonic transducers
Thaum siv ultrasonic transducer, kev txiav txim siab tseem ceeb ua ntej kev sib txuam nrog kev tawm tswv yim thiab cov zis xaus, thiab tom qab ntawd qhov loj ntawm cov neeg kho tshuab nruab thiab txuam. Qhov zaus ntawm qhov hloov pauv yog qhov yooj yim. Zaus yog hais txog qhov zaus ntsuas los ntawm kev sib kis kab txoj kev siv cov ntsuas hluav taws xob (ua haujlwm) lub tshuab hluav taws xob, millivoltmeter, oscilloscope, thiab lwm yam, lossis siv cov twj zoo sib xws (xws li lub network impedance analyzer). Feem ntau hu ua lub teeb liab me zaus. Tus coj yog lub zaus lub computer, uas yog, qhov tseeb ua hauj lwm zaus ntsuas thaum tus neeg siv txuas lub transducer mus rau chassis los ntawm ib lub cable thiab muab nws rau ntawm qhov tsis ua haujlwm lossis thauj. Vim tias tus neeg muas zaub' s txoj kev sib piv hauv Circuit Court yog qhov sib txawv, qhov hloov zaus ntawm tib lub hloov pauv ntawm cov khoom siv tsav sib txawv (cov thawv hluav taws xob) kuj sib txawv, thiab qhov zaus no tsis tuaj yeem siv los ua lub hauv paus rau kev sib tham sib pauv.
Cia lub tshuab hloov pauv, kev tsav tsheb fais fab kev pab thiab cov pwm sib koom tes zoo ua kom tiav cov khoom siv ultrasonic, xa mus ua kev sib txuam. Txij li qhov cuam tshuam ntawm kev txuam ntawm kev ua tiav ntawm tag nrho lub tshuab yog kev txiav txim siab, txawm hais tias qhov tseem ceeb ntawm kev txuam yog hais txog, nws tsis tuaj yeem ua kom dhau. Qhov tseem ceeb xav txog kev sib piv yog lub peev xwm ntawm qhov hloov pauv, tom qab los ntawm zaus ntawm qhov hloov pauv.
Qhov sib txuam ntawm lub tshuab hluav taws xob thiab lub zog tsav tsheb thauj khoom mas suav nrog kev sib raug zoo tsis sib xws, kev sib luag ntawm cov hluav taws xob, kev sib txuas hluav taws xob thiab cov hluav taws xob capacitive piv. Qhov tseem ceeb tshaj plaws yog kev hloov tau thiab zaus. Raws li tau hais ua ntej, txij li cov phaj ceramic yog cov hluav taws xob tiv thaiv, koj tuaj yeem yuav luag nkag siab tias lub tshuab hloov khoom tsis yog lub zog, nws yog qhov sib npaug rau lub zog. Txhawm rau ua kom cov transducer ua haujlwm ib txwm, qhov tseeb, qhov hluav taws xob AC siab yog siv rau nws los ntawm kev tsav Circuit Court kom them thiab tso tawm lub zog ntawm qhov hloov pauv. Cov piezoelectric ceramic daim ntawv ua tiav ib qho kev nthuav dav thiab cov nqes tes nyob hauv qhov kev txiav txim ntawm ib qho kev sib hloov hluav taws xob, yog li tsim cov kev ua kom ntev kev co ntawm tag nrho cov hloov khoom, yog li tsav lub tshee ntawm lub tshuab raj thiab cov pwm. Yog li no, yog tias qhov sib txuam ntawm tus capacitor tsis zoo, lub teeb lub zog yog lub zog hloov qis dua thiab lub vuam tsis muaj zog. Cov ntsuas hluav taws xob hnyav yuav ua kom kub hnyav, hlawv cov roj electrode ntawm cov fais fab mov thiab lub raj xa hluav taws xob siab. Peb cov khoom hloov pauv tuaj nrog cov khoom ntawm kev ua haujlwm parameter rooj, uas qhia txog lub peev xwm thiab zaus ntawm txhua lub transducer. Kev tsav tsheb fais fab yuav tsum kho lub tshuab hluav taws xob loj hloov mus raws li lub zog hloov ntawm qhov hloov pauv, ua kom raug qhov ntsuas ntawm lub phaj capacitor, lub ncov ntawm lub ncov hluav taws xob thiab qhov zaus hloov coil. Vim tias qhov rhiab heev ntawm inductance thiab capacitance, lub hwj chim ua kom nrov zog, chokes thiab lwm qhov txuas hluav taws xob tseem yuav cuam tshuam kev sib txuam. Ntxiv mus, thaum kev ua haujlwm nce zuj zus, qhov kub ntawm qhov hloov pauv yuav nce ntxiv, uas ua rau lub zog nruab nrab hloov pauv, thiab qhov hloov pauv yuav siab tshaj 50%. Yog hais tias lub capacitance tsis tuaj yeem sib phim tau zoo, nws yuav ua rau muaj qhov loj tam sim no thiab qhov ntsuas hluav taws xob sib txawv hauv lub voj, qhov ntsuas hluav taws xob muaj tsawg heev, thiab lub zog ua haujlwm virtual yog qhov siab heev. Saib rau ntawm qhov tam sim no loj, tab sis tus hloov hluav taws xob tsis muaj zog thiab yooj yim rau cua sov, thiab cov cuab yeej hluav taws xob ntawm lub zog fais fab kuj yooj yim rau qhov kub thiab ua kom puas. Feem ntau, nws yuav yog vim tawg lossis hlawv lub tshuab hluav taws xob (pob ntseg).
