Ngati mukupanga zinthu monga zida zapakhomo, zotetezera, zolowera pakhomo kapena zotchingira pakompyuta, mutha kusankha kuyika buzzer ngati njira yokhayo yolumikizirana ndi ogwiritsa ntchito kapena ngati njira yolumikizirana ndi ogwiritsa ntchito mwaukadaulo.
Wolemba Bruce Rose, Injiniya Wamapulogalamu Akuluakulu, Zida za CUI
Mulimonsemo, buzzer ikhoza kukhala njira yotsika mtengo komanso yodalirika yovomerezera lamulo, kusonyeza momwe zida zilili kapena ndondomeko, kulimbikitsana, kapena kukweza alamu.
Kwenikweni, buzzer nthawi zambiri imakhala mtundu wa maginito kapena piezoelectric.Kusankha kwanu kungadalire mawonekedwe a siginecha yoyendetsa, kapena mphamvu yomvera yofunikira komanso malo omwe alipo.Mukhozanso kusankha pakati chizindikiro ndi transducer mitundu, malingana ndi phokoso mukufuna ndi dera-kapangidwe luso kupezeka kwa inu.
Tiyeni tiwone mfundo zomwe zili m'makina osiyanasiyana ndikuwunika ngati mtundu wa maginito kapena piezo (ndi kusankha chizindikiro kapena chowongolera) zingakhale zoyenera pulojekiti yanu.
Magnetic buzzers
Magnetic buzzer kwenikweni ndi zida zoyendetsedwa ndipano, zomwe zimafunikira kupitilira 20mA kuti igwire ntchito.Magetsi ogwiritsidwa ntchito amatha kukhala otsika ngati 1.5V kapena mpaka pafupifupi 12V.
Monga momwe chithunzi 1 chikuwonetsera, makinawa ali ndi koyilo ndi ferromagnetic disk yosinthika.Pamene mphamvuyi ikudutsa pa koyilo, diski imakopeka ndi koyiloyo ndikubwerera kumalo ake abwino pamene panopa sikuyenda.
Kupatuka kwa diski kumeneku kumapangitsa kuti mpweya wapafupi ndi malowo uziyenda, ndipo khutu la munthu limatanthauzidwa ngati phokoso.Zomwe zikuchitika kudzera pa koyilo zimatsimikiziridwa ndi mphamvu yogwiritsidwa ntchito ndi coil impedance.
Chithunzi 1. Maginito buzzer kumanga ndi ntchito mfundo.
Piezo buzzers
Chithunzi 2 chikuwonetsa zinthu za piezo buzzer.Disiki ya zinthu za piezoelectric imathandizidwa m'mphepete mwa mpanda ndipo zolumikizira zamagetsi zimapangidwira mbali ziwiri za diski.Mphamvu yamagetsi yomwe imagwiritsidwa ntchito pamaelekitirodi awa imapangitsa kuti zinthu za piezoelectric zisokonezeke, zomwe zimapangitsa kuti mpweya uziyenda womwe umamveka ngati phokoso.
Mosiyana ndi maginito buzzer, piezo buzzer ndi chipangizo choyendetsedwa ndi magetsi;mphamvu yogwiritsira ntchito nthawi zambiri imakhala yokwera kwambiri ndipo ikhoza kukhala pakati pa 12V ndi 220V, pamene yamakono imakhala yosakwana 20mA.Piezo buzzer imapangidwa ngati capacitor, pomwe maginito buzzer amapangidwa ngati koyilo motsatizana ndi resistor.
Chithunzi 2. Piezo buzzer yomanga.
Kwa mitundu yonse iwiri, mafupipafupi a mawu omveka omwe amamveka amatsimikiziridwa ndi maulendo oyendetsa galimoto ndipo amatha kuyendetsedwa mosiyanasiyana.Kumbali ina, pomwe ma piezo buzzers amawonetsa ubale wabwino pakati pa mphamvu ya siginecha ndi mphamvu yotulutsa mawu, mphamvu yamawu ya maginito buzzers imatsika kwambiri ndikuchepa mphamvu ya siginecha.
Makhalidwe a siginecha yagalimoto yomwe muli nayo imatha kukhudza ngati mungasankhe maginito kapena piezo buzzer kuti mugwiritse ntchito.Komabe, ngati kukweza ndikofunikira kwambiri, ma buzzer a piezo amatha kutulutsa mulingo wapamwamba wa Sound Pressure Level (SPL) kuposa maginito maginito komanso amakhala ndi chopondapo chachikulu.
Chizindikiro kapena transducer
Lingaliro la kusankha mtundu wa chizindikiro kapena transducer limatsogozedwa ndi kuchuluka kwa mawu ofunikira komanso kapangidwe ka madera ogwirizana kuti ayendetse ndikuwongolera buzzer.
Chizindikiro chimabwera ndi zozungulira zoyendetsa zomwe zimapangidwa mu chipangizocho.Izi zimathandizira kamangidwe ka dera (chithunzi 3), kuthandizira njira ya pulagi-ndi-sewero, posinthanitsa ndi kusinthasintha.Ngakhale mumangofunika kugwiritsa ntchito magetsi a dc, munthu amatha kupeza chizindikiro chosalekeza kapena chogwedeza chifukwa mafupipafupi amakhazikika mkati.Izi zikutanthauza kuti phokoso la ma frequency angapo monga ma siren kapena ma chimes sizingatheke ndi ma buzzers.
Chithunzi 3. Chizindikiro cha buzzer chimapanga phokoso pamene dc voltage ikugwiritsidwa ntchito.
Popanda magalimoto oyendetsa omangidwa, transducer imakupatsani mwayi woti mukwaniritse mawu osiyanasiyana pogwiritsa ntchito ma frequency osiyanasiyana kapena mafunde amawu.Kuphatikiza pamawu opitilira apo kapena akugunda, mutha kutulutsa mawu monga machenjezo amitundu yambiri, ma siren kapena ma chime.
Chithunzi 4 chikuwonetsa mawonekedwe ogwiritsira ntchito maginito transducer.Kusinthako kumakhala ndi bipolar transistor kapena FET ndipo imagwiritsidwa ntchito kukulitsa mawonekedwe osangalatsa.Chifukwa cha mayendedwe a coil, diode yomwe ikuwonetsedwa pachithunzichi ndiyofunikira kuti muchepetse mphamvu yamagetsi yobwerera pomwe transistor yazimitsidwa mwachangu.
Chithunzi 4. Transducer maginito imafuna chizindikiro chokomera, amplifier transistor ndi diode kuti igwire voteji ya flyback.
Mutha kugwiritsa ntchito gawo losangalatsa lofananira ndi transducer ya piezo.Chifukwa transducer ya piezo ili ndi inductance yochepa, diode sifunikira.Komabe, dera limafunikira njira yokhazikitsira voteji pamene chosinthacho chikutseguka, chomwe chingachitike powonjezera chopinga m'malo mwa diode, pamtengo wamagetsi apamwamba kwambiri.
Munthu amathanso kukulitsa mulingo wamawu pokweza voteji yapamwamba kwambiri yomwe imagwiritsidwa ntchito pa transducer.Ngati mumagwiritsa ntchito dera la mlatho wathunthu monga momwe tawonetsera pa chithunzi 5, magetsi ogwiritsidwa ntchito ndi aakulu kuwirikiza kawiri kuposa magetsi omwe alipo, omwe amakupatsani mphamvu zomvera za 6dB zapamwamba.
Chithunzi 5. Kugwiritsa ntchito dera la mlatho kungathe kuwirikiza kawiri magetsi omwe amagwiritsidwa ntchito ku transducer ya piezo, kupereka 6 dB mphamvu yowonjezera yowonjezera.
Mapeto
Ma buzzers ndi osavuta komanso otsika mtengo, ndipo zosankhazo zimangokhala m'magulu anayi ofunikira: maginito kapena piezoelectric, chizindikiro kapena transducer.Magnetic buzzer amatha kugwira ntchito kuchokera ku ma voltages otsika koma amafuna mafunde okwera kwambiri kuposa mitundu ya piezo.Ma piezo buzzers amatha kupanga SPL yapamwamba koma amakhala ndi chopondapo chachikulu.
Mutha kugwiritsa ntchito buzzer yokhala ndi voliyumu ya dc yokha kapena kusankha transducer kuti mumve zomveka bwino ngati mutha kuwonjezera zozungulira zofunika zakunja.Mwamwayi, CUI Devices imapereka maginito osiyanasiyana ndi ma piezo buzzers mumitundu yowonetsera kapena transducer kuti kusankha kwa buzzer pamapangidwe anu kukhala kosavuta.
Nthawi yotumiza: Sep-12-2023
