Yuav ua li cas thiaj nrhiav kev txuam ultrasonic transducer:
Cia lub cev hloov pauv, kev tsav tsheb fais fab, thiab cov vuam mauv sib koom tes zoo tsim kom tiav cov khoom siv ultrasonic tuaj yeem raug xa mus ua kev sib txuam rau luv luv. Txij li qhov cuam tshuam ntawm kev txuam ntawm kev ua tau zoo ntawm tag nrho lub tshuab yog kev txiav txim siab, qhov tseem ceeb ntawm kev txuam tsis tuaj yeem siv ntau. 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.
Nws yuav tsum nco ntsoov tias lub ultrasonic transducer nws tus kheej tsis yog lub zog tsim hluav taws xob, nws tsuas yog lub zog hloov kho lub zog. Nws hloov lub zog hluav taws xob rau lub suab hluav taws xob (lub zog siv tshuab). Hauv qab qhov kev xav tias qhov kev tawm tswv yim (tsav lub zog) thiab cov khoom tso tawm (lub zog, lub pwm) zoo sib xws, nws tuaj yeem hloov (tso zis) ntau lub zog.
Cov lus qhia muab piv rau qhov sib piv ntawm kev hloov pauv thiab tsav lub zog tsav. Yog tias qhov tso zis ntsuas tau zoo tab sis kev sib txuam ntawm cov tswv yim tsis zoo, qhov hloov pauv tsis muaj zog thiab lub vuam tsis muaj zog. Yog tias qhov kev sib txuam cov txiaj ntsig tsis zoo tab sis cov kev sib txuam sib xyaw yog qhov zoo, lub tshuab hloov pauv yuav dhau lawm, ua rau nti nti tawg, tawg, tawg ntsia hlau, txhuas tawg lossis hlawv lub raj fais fab ntawm lub thawv hluav taws xob. Piv txwv li, yog tias lub tsheb sib tsoo ntawm cov tsuj roj hauv nruab nrab, lub cav yuav tsum tau yooj yim.
Qhov sib txuam ntawm lub tshuab hloov tsheb thiab lub zog tsav tsheb thauj khoom mas muaj 4 yam, piv txwv li impedance txuam, zaus sib txuam, kev sib piv hluav taws xob, thiab kev sib txuam nrog lub zog ua ke. Qhov tseem ceeb tshaj plaws muaj peev xwm tiv taus ntau thiab ntau zaus. Raws li tau hais ua ntej, vim hais tias cov ntawv ceramic yog cov rwb thaiv tsev, koj tuaj yeem yuav luag nkag siab tias qhov hloov khoom tsis yog lub zog, nws tsuas yog sib npaug ntawm tus capacitor. Txhawm rau kom lub tshuab hloov ua haujlwm, nws yog tiag thov rau nws los ntawm kev tsav Circuit Court siab AC voltage, kom lub capacitance ntawm qhov transducer raug them thiab tawm. Lub piezoelectric ceramic daim ntawv ua ke synchronous nthuav dav thiab daim ntawv cog lus nyob rau hauv qhov kev txiav txim ntawm ib qho kev sib hloov hluav taws xob, tsim qhov ntev ntawm kev co ntawm tag nrho cov hloov khoom, yog li tsav lub tshee ntawm lub tshuab raj thiab cov pwm. Yog li ntawd, yog tias cov capacitor txuam tsis zoo, lub teeb yog lub zog hloov qis thiab lub vuam tsis ruaj; qhov hnyav ib qho, lub tshuab hloov pauv ua hluav taws xob siab hnyav, hlawv cov roj electrodes thiab lub raj muaj zog ntawm lub zog fais fab. Peb cov khoom hloov pauv ua ke nrog cov khoom ntawm kev ua haujlwm parameter rooj, uas qhia txog lub capacitance thiab zaus ntawm txhua lub transducer. Kev tsav lub zog ntawm lub zog yuav tsum kho cov kev ntsuas ntawm qhov hloov hluav taws xob siab, txuam nrog lub zog hloov pauv phaj, peak kauj, thiab zaus hloov coil raws li lub peev xwm ntawm qhov hloov pauv. Vim tias qhov kev nkag siab ntawm inductance thiab capacitance, lub zog ua kom muaj zog, lub suab sib txuas ua ke thiab lwm lub ntsuas hluav taws xob kuj cuam tshuam qhov sib txuam. Thiab thaum kev ua haujlwm nce zuj zus, qhov kub ntawm qhov hloov pauv yuav nce siab, uas ua rau lub nruab nrog tswj thiab qhov hloov yuav siab dua 50%. Yog hais tias lub capacitance tsis tuaj yeem sib phim tau zoo, qhov tam sim no thiab qhov hluav taws xob theem qhov sib txawv hauv lub voj yuav loj heev. , Lub zog ntsuas tau qis heev thiab ua haujlwm virtual tseem nce siab. Saib ntawm lub siab tam sim no, tab sis tus hloov hluav taws xob tsis muaj zog, 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, cov tshuab hluav taws xob hloov pauv (pob ntseg) tawg lossis hlawv tawm, uas tej zaum los ntawm qhov no.
