Ultrasonic Ua Haujlwm Pabcuam

Yog hais tias lub sij hawm uas muaj tus kabmob sib txuas yog 40KHZ piezoelectric ceramic (dual crystal oscillator), qhov 40KHz siab tshaj yog siv, lub piezoelectric ceramic zaj duab xis yog raws li qhov muaj qhov muaj qhov siab tshaj plaws ntawm voltage polarity elongation thiab shorten, mam li xa cov ultrasonic 40KHz zaus, nws Ultrasonic yoj rau hauv daim ntawv ntawm kev sib kis ceev (qhov ceev yuav tsum modulated los ntawm Circuit Court tswj), thiab xa mus rau lub yoj receiver. Lub receiver yog kev siv lub siab ceev siv los siv txoj cai ntawm piezoelectric Cheebtsam ntawm qhov siab, kom lub piezoelectric Cheebtsam ntawm lub lim, qhov tshwm ntawm ib sab yog "+" ncej, sab nraud yog "-" ncov qaum 40KHz sine voltage. Vim hais tias qhov siab tshaj qhov dav voltage qhov siab me, nws yuav tsum tau loj hlob. Lub ultrasonic sensor tso cai rau tus neeg tsav tsheb kom rov zoo siv tau, siv txoj cai ntawm kev txheeb xyuas cov kev khaum ntawm los yog ze ntawm txoj kev ntawm kev hloov, thiab muab cov lus ceeb toom kom sai. Txoj kev tsim kom paub tias tau tsim tawm tau yoojyim muab lub suab thiab lub teeb thiab Mao cov lus ceeb toom thiab kev ceeb toom, thiab nws cov lus ceeb toom qhia hais tias qhov kev taw qhia thiab kev taw qhia ntawm obstructions nyob rau hauv lub qhov muag tsis pom kev. Nyob rau hauv txoj kev no, nyob rau hauv qhov chaw nqaim txawm tias nws yog chaw nres tsheb los yog tsav tsheb, nrog kev pab los ntawm kev cuam tshuam qhov teeb meem thaiv teeb meem kev ceeb toom, tus tsav tsheb yuav txo tau kev txo zog, thiab tuaj yeem siv qhov kev txiav txim tsim nyog.