I-alam yokulwa nobusela be-Ultrasonic, isicelo esilumkileyo sokulwa nobusela

█Intshayelelo

Ukusebenzisa i-sensor ye-ultrasonic njenge-transmitter kunye ne-receiver, i-transmitter ikhupha i-amplitude ye-ultrasonic wave elinganayo kwindawo efunyenweyo kwaye umamkeli ufumana i-wave ye-ultrasonic ebonakalisiweyo, xa kungekho nto ishukumayo kwindawo ebhaqiweyo, i-wave ye-ultrasonic ebonakalisiweyo ye-amplitude elinganayo. .Xa kukho into ehambayo kwindawo yokufumanisa, i-ultrasonic wave amplitude ebonakalisiweyo iyahluka kwaye itshintsha rhoqo, kwaye isiphaluka esifumanayo sibona isignali eguqukayo yokulawula isiphaluka ukuba iphendule, oko kukuthi, ukuqhuba i-alamu. 

I-alamu ye-ultrasonic burglar

█Wumgaqo-nkqubo we-alam yokulwa nobusela be-ultrasonic

Ngokwesakhiwo sayo kunye neendlela zokufakela zahlulwe zibe ziintlobo ezimbini: enye kukufakelwa kwee-transducers ezimbini ze-ultrasonic kwindlu enye, oko kukuthi, i-transceiver kunye ne-transmitter edibeneyo yohlobo, umgaqo wayo wokusebenza usekelwe kwimpembelelo ye-Doppler yamaza omsindo, kwakhona eyaziwa ngokuba yiDoppler.Xa kungekho nto ishukumayo ingena kwindawo efunyenweyo, amaza abonakalisiweyo e-ultrasonic anomlinganiselo olinganayo we-amplitude.Xa into eshukumayo ingena kwindawo efunyenweyo, i-ultrasound ebonakalisiweyo ye-amplitude engalinganiyo kwaye iguquka rhoqo.Ukuhanjiswa kwentsimi yamandla e-ultrasound ekhutshweyo kunomgaqo othile, ngokuqhelekileyo kwindawo ejongene nolwalathiso kwi-elliptical field field distribution.

Enye i-transducers ezimbini zibekwe kwiindawo ezahlukeneyo, oko kukuthi, ukufumana kunye nokuhambisa uhlobo lokwahlula, olwaziwa njenge-sound field detector, i-transmitter yayo kunye ne-receiver ininzi i-non-directional (okt omnidirectional) i-transducer okanye i-half-way type transducer.I-transducer engekho-directional ivelisa i-hemispherical energy field distribution pattern kunye nohlobo lwe-semi-directional luvelisa i-conical energy field distribution pattern. 

Umgaqo wokusebenza wohlobo lweDoppler 

█Umzekelo we-ultrasonic eqhubekayo ye-wave wave transmission circuit.

Umzekelo we-ultrasonic eqhubekayo ye-wave wave transmission circuit 

█Iindawo ezisetyenziselwa ii-alamu zokulwa nobusela.

Iifowuni ze-Ultrasonic ezinokubona izinto ezihambayo zinezicelo ezininzi, umzekelo, ukuvula umnyango ngokuzenzekelayo kunye nokuvala ukufumanisa kunye nokulawula;iziqalisi zokuphakamisa ngokuzenzekelayo;umtshina we-alamu wokulwa nobusela, njl. njlInomlinganiselo omkhulu wokulawula kunye nokuthembeka okuphezulu.