Taw qhia rau Ultrasonic Transducers
Lub ultrasonic transducer yog cov xuab zeb tsim ua los ntawm cov hlau lead zirconate titanate piezoelectric ceramic khoom. Cov tshuaj ntxuav ultrasonic feem ntau siv tshuab raj hom ultrasonic hloov dua siab tshiab, uas ua kom cov txuas txuas ntxiv thiab suab hluav taws xob ua kom muaj zog los ntawm kev ua kom tawg hluav taws xob nyob rau sab pem hauv ntej. Nrog rau lub meej mom tsim nyog, lub tshuab hloov pauv tau zoo electromechanical hloov chaw ua haujlwm tau zoo nyob rau hauv cov xwm txheej ntawm lub zog loj thiab qhov loj raug.
1. kev tsim kho
Thaum pib ntawm lub xyoo pua 20, kev txhim kho hluav taws xob thev naus laus zis ua rau tib neeg siv cov piezoelectric thiab magnetostrictive effect ntawm qee yam khoom siv los tsim ntau yam electromechanical hloov. Xyoo 1917, tus kws tshaj lij Fabkis Fabkis Lang Zhiwan ua lub tshuab ci khaub thuas ultrasonic transducer siv ntuj piezoelectric quartz thiab siv nws txhawm rau txhawm rau taug kev submarines rau hauv hiav txwv pem teb. Nrog cov kev txhim kho txuas ntxiv ntawm cov ntawv thov ultrasonic hauv ntau qhov chaw ntawm kev ua tub rog thiab kev lag luam hauv teb chaws, magnetostrictive transducers nrog ntau dua ultrasonic zog thiab hluav taws xob, hluav taws xob thiab electrostatic hloov rau ntau lub hom phiaj tau tshwm sim. Ultrasonic transducer.
2. Cov khoom faib tawm
Feem ntau muaj ob hom ultrasonic transducers: magnetostrictive transducers thiab piezoelectric crystal transducers.
Magnetostrictive
Muaj cov magnetostrictive npib tsib xee transducers thiab ferrite transducers.
Kev hloov pauv hluav taws xob electro-acoustic efficiency ntawm ferrite transducers yog tsawg. Feem ntau, tom qab ib lossis ob xyoos ntawm kev siv, qhov kev ua haujlwm yuav txo qis thiab lub tshuab hluav taws xob electro-acoustic hloov dua siab tshiab yuav luag ploj. Cov txheej txheem ntawm nickel chip transducer yog qhov nyuaj thiab kim, yog li nws tsis tshua muaj siv.
Piezoelectric siv lead ua hom
Cov cuab yeej ua kom pom tseeb thiab ntseeg tau yog cov nyhuv piezoelectric, uas ua kom pom tseeb kev hloov pauv ntawm lub zog hluav taws xob thiab lub suab lub zog, thiab hu ua piezoelectric transducer. Lub piezoelectric nyhuv ntawm cov khoom hloov cov teeb liab hluav taws xob rau hauv kev siv tshuab kev co. Qhov hloov pauv no muaj qhov zoo electroacoustic hloov dua siab tshiab, cov khoom siv pheej yig, kev tsim khoom yooj yim thiab tsis yooj yim rau lub hnub nyoog.
Cov ntaub ntawv siv dav dav yog quartz siv lead ua, barium titanate thiab zirconate titanate. Qhov nthuav tawm thiab kev txiav txim siab ntawm cov quartz siv lead ua muaj tsawg heev, thiab qhov hluav taws xob ntawm 3000V tsim tawm ib qho deformation qis dua 0.01um. Cov nyhuv piezoelectric ntawm barium titanate yog 20-30 zaug ntawm quartz siv lead ua, tab sis nws cov kev ua tau zoo thiab kev siv tshuab tsis zoo li quartz siv lead ua. Lead zirconate titanate muaj qhov zoo ntawm ob qho, thiab feem ntau tuaj yeem siv los ua lub zog rau kev tu ultrasonic, qhov khuam pom thiab qhov ua kom muaj zog tsawg ultrasonic.
3. muaj pes tsawg leeg
Lub hauv paus piezoelectric ceramic ntsiab
Pem hauv ntej thiab tom qab hlau npog
Ntsig ntsia hlau ntxhw
Electrode daim ntawv
Insulating raj
Hom sandwich transducer no yuav tsim hluav taws xob ultrasonic ruaj khov thaum lub txim hloov. Qhov no yog qhov feem ntau yooj yim thiab txoj kev loj kom tau txais lub zog ultrasonic tsav qhov chaw.
4. Ua ntej tawm hauv lub Hoobkas, txhua tus neeg hloov pauv ultrasonic tau kuaj xyuas thiab tsim nyog.
Siv lub siab kev co lub taub hau impedance tester los kuaj lub ntsiab tsis tseem ceeb ntawm lub taub hau vibrating: Fs R1 C0 Qm, ua kev soj ntsuam ntawm lub taub hau vibrating, txoj cai tshuaj ntsuam xyuas yog: impedance ≤25Ω yog qhov tsim nyog, impedance sib txawv yog tsis pub dhau 10Ω, thiab zaus< ±="" 0.5khz,="" thawj="" lub="" iav="" yog="" li="" ntawm="">
Lub taub hau ntsaum: 1. Muaj cov ntsiab lus sib txuam 2. Ob qho tib si raug laus rau 3 lub hlis, thiab txoj haujlwm ua haujlwm ruaj khov.
