Mlingo ndi chimodzi mwa zinthu zofunika kwambiri pakuwunika momwe ntchito ikuyendera. Mu kuyeza kosalekeza kwa matanki osiyanasiyana, malo osungiramo zinthu, maiwe, ndi zina zotero, zimakhala zovuta kukhala ndi zida zoyezera zomwe zingakwaniritse mikhalidwe yonse yogwirira ntchito chifukwa cha mitundu yosiyanasiyana ya mikhalidwe ya m'munda.
Pakati pa izi, zida zoyezera za radar ndi ultrasound zimagwiritsidwa ntchito kwambiri mu zida zoyezera zosakhudzana. Ndiye, kodi kusiyana pakati pa mita ya radar ndi mita ya ultrasonic ndi kotani? Kodi mfundo ya mitundu iwiriyi ya kuyeza ndi iti? Kodi ubwino wa mita ya radar ndi mita ya ultrasonic ndi wotani?
Choyamba, mita ya ultrasound
Kawirikawiri timatcha mafunde a mawu omwe ali ndi mafunde opitilira 20kHz, mafunde a ultrasonic ndi mtundu wa mafunde amakina, ndiko kuti, kugwedezeka kwa makina mu njira yolumikizirana mu njira yofalitsa, imadziwika ndi mafunde apamwamba, kutalika kwa nthawi yochepa, kufalikira pang'ono kwa ma diffraction, ndi kutsogolera bwino, kumatha kukhala kufalikira kwa ray ndi directional.
Kuchepa kwa ma ultrasound mu zakumwa ndi zinthu zolimba ndi kochepa kwambiri, kotero kuthekera kolowera kumakhala kolimba, makamaka mu zinthu zolimba zosawoneka bwino, ma ultrasound amatha kulowa m'mamita makumi ambiri kutalika, kukumana ndi zodetsa kapena mawonekedwe kudzakhala ndi kuwunikira kwakukulu, muyeso wa ultrasound ndikugwiritsa ntchito mawonekedwe ake awa.
Mu ukadaulo wozindikira ma ultrasound, mosasamala kanthu za mtundu wa chipangizo cha ultrasound, ndikofunikira kusintha mphamvu zamagetsi kukhala kutulutsa kwa ma ultrasound, kenako nkulandiranso kukhala zizindikiro zamagetsi, chipangizo chomaliza ntchitoyi chimatchedwa ultrasonic transducer, chomwe chimadziwikanso kuti probe.
Ikagwira ntchito, chosinthira ma ultrasound chimayikidwa pamwamba pa chinthu choyezedwacho ndipo chimatulutsa mafunde a ultrasound pansi. Mafunde a ultrasound amadutsa mumlengalenga, amabwereranso akakumana ndi pamwamba pa chinthu choyezedwacho, ndipo amalandiridwa ndi chosinthira ma ultrasound ndikusinthidwa kukhala chizindikiro chamagetsi. Pambuyo pozindikira chizindikirochi, gawo lozindikira zamagetsi limachisandutsa chizindikiro chofanana ndi chamagetsi kuti chiwonetsedwe ndi kutuluka.
Awiri, mita ya radar
Njira yogwiritsira ntchito mita ya radar ndi yofanana ndi ya mita ya ultrasound, ndipo mita ya radar imagwiritsanso ntchito njira yogwirira ntchito yotumizira - kuwonetsa - kulandira. Kusiyana kwake ndi kwakuti muyeso wa mita ya radar imadalira kwambiri chosinthira cha ultrasonic, pomwe mita ya radar imadalira mutu wa ma frequency apamwamba ndi antenna.
Ma ultrasound level meter amagwiritsa ntchito mafunde a makina, pomwe radar level meter amagwiritsa ntchito ma frequency amphamvu kwambiri (angapo G mpaka makumi a G Hertz) mafunde amagetsi. Mafunde amagetsi amayenda pa liwiro la kuwala, ndipo nthawi yoyenda imatha kusinthidwa kukhala chizindikiro cha level ndi zida zamagetsi.
Chiyeso china chodziwika bwino cha radar ndi choyezera mafunde a radar.
Chiyeso cha radar cha mafunde otsogozedwa ndi choyezera mulingo wa radar chozikidwa pa mfundo ya nthawi yowunikira (TDR). Kugunda kwa maginito kwa mita ya radar kumafalikira motsatira chingwe chachitsulo kapena probe pa liwiro la kuwala. Chikakumana ndi pamwamba pa medium yoyezedwa, gawo la kugunda kwa mita ya radar limawonetsedwa kuti lipange echo ndikubwerera ku chipangizo choyambitsa pulse m'njira yomweyo. Mtunda pakati pa chotumizira ndi malo oyezera apakati umagwirizana ndi nthawi yofalitsa ya pulse pomwe kutalika kwa mulingo wamadzimadzi kumawerengedwa.
Chachitatu, ubwino ndi kuipa kwa radar ndi ultrasound level meter
1. Kulondola kwa ultrasound sikwabwino monga radar;
2. Chifukwa cha ubale pakati pa ma frequency ndi kukula kwa antenna, mita ya radar yokhala ndi ma frequency apamwamba ndi yaying'ono komanso yosavuta kuyiyika;
3. Popeza ma frequency a radar ndi okwera, kutalika kwa mafunde ndi kochepa, ndipo pali kuwunikira bwino pamalo olimba opendekeka;
4. Malo obisika omwe amayezedwa ndi radar ndi ochepa kuposa a ultrasound;
5. Chifukwa cha kuchuluka kwa ma radar, Angle ya radar beam ndi yaying'ono, mphamvu imakhala yochuluka, ndipo mphamvu ya echo imakulitsidwa pamene ikuthandizira kupewa kusokoneza;
6. Poyerekeza ndi ma ultrasound level meters pogwiritsa ntchito mafunde a makina, radar kwenikweni sikhudzidwa ndi vacuum, nthunzi ya madzi mumlengalenga, fumbi (kupatula graphite, ferroalloy ndi fumbi lina la dielectric), kusintha kwa kutentha ndi kuthamanga;
Nthawi yotumizira: Sep-18-2023