Ultrasonic sensors yog cov cuab yeej hnov qab uas hloov hluav taws xob hluav taws xob rau hauv ultrasonic tsis. Lub hauv paus ntsiab lus ntawm kev ua haujlwm zoo ib yam li radar, raws li lawv pom lub hom phiaj raws li kev txhais cov teeb liab uas tau cuam tshuam los ntawm lawv. Qhov ceev ntawm lub suab yog tus nqi tas li, yog li siv lub sensor, koj tuaj yeem yooj yim teeb tsa qhov kev ncua deb ntawm cov khoom, sib xws rau lub sijhawm luv ntawm kev xa cov teeb liab nws tus kheej thiab xa rov qab cov ncha los ntawm nws.
Ultrasonic sensors muaj ntau yam nta uas tso cai rau koj los txiav txim qhov chaw ntawm lawv siv. Nws yog ib qho ua tau kom ib leeg tawm ib qho luv luv, teeb liab directivity, qis ceev ntawm yoj propagation. Lub ntsiab kom zoo dua ntawm ultrasonic sensors yog lawv tus nqi qis. Hauv tsheb, lawv tuaj yeem siv los npaj cov chaw nres tsheb. Ultrasonicqib sensors nrog kev ncua ntau yam tau nquag siv nyob rau hauv ib tug xov tooj ntawm cov qauv kev pab cuam rau kev saib xyuas qhov muag tsis pom kev. Lawv kuj tau siv nyob rau hauv ntau yam kev tswj lub tsheb hauv hom tsis siv neeg.
Raws li lub hauv paus ntawm lub sensor tuaj yeem hu ua lub transducer uas sib txuas cov khoom nquag thiab cov diaphragm. Nyob rau hauv tas li ntawd, lub transducer ua hauj lwm raws li ib tug transmitter thiab receiver. Lub active caij generates ib tug luv luv mem tes, uas yog ces tau txais raws li ib tug ncha los ntawm qhov teeb meem. Nws yog tsim los ntawm cov khoom tshwj xeeb piezoelectric. Nyob rau hauv cov ntaub ntawv no, aluminium diaphragm ua raws li kev sib cuag ntawm lub transducer, tso cai rau cov yam ntxwv acoustic txiav txim siab. Lub hauv paus ntawm lub transducer yog txaus resilient kom nqus tau cov vibrations. Tag nrho cov khoom yog nyob rau hauv ib lub hnab yas nruab nrog connectors rau kev sib txuas.
Ultrasonic sensors ua haujlwm zoo li no: thaum tau txais lub teeb liab los ntawm sab nraud, cov khoom nquag ua rau lub diaphragm vibrate, xa ultrasonic pulses mus rau qhov chaw. Thaum cov nthwv dej no ntsib nrog ib qho kev khuam siab, lawv raug cuam tshuam, rov qab mus rau lub transducer, thiab tsim kev vibrations ntawm lub active caij, los ntawm cov hluav taws xob teeb liab ces tshem tawm.
Ultrasonic sensors muaj xws li cov yam ntxwv tseem ceeb xws li mem tes zaus, nrhiav kom pom ntau yam, ceev. Cov cuab yeej nres tsheb niaj hnub no muaj qhov zaus ntawm 40 kHz, thiab kev tshawb nrhiav ntau yammus txog 2.5 meters.
Cov neeg tsim khoom feem ntau tsis qhia tus nqi ntawm qhov tseem ceeb xws li lub kaum sab xis saib. Hauv cov sensors, lub kaum sab xis ntawm kev pom feem ntau yog txiav txim los ntawm qhov zaus ntawm cov teeb liab thiab cov duab thiab qhov loj ntawm lub transducer. Qhov siab dua ntawm cov mem tes zaus, qhov pom qhov me me yuav yog.
Ultrasonic nrug sensors muaj ntau qhov zoo uas tsis tuaj yeem lees paub, tab sis lawv kuj muaj cov kev txwv tseem ceeb heev. Kev ua tau zoo thiab qhov tseeb ntawm cov cuab yeej raug txo qis hauv huab cua phem, nrog rau cov pa phem hnyav. Lub sensor muaj peev xwm hla cov khoom me me nrog rau qhov chaw tsis tshua muaj kev cuam tshuam.
