Chifunga ndi mvula zimakhala zofala. M'malo oterewa omwe sawoneka bwino, kuyendetsa galimoto kapena kuyenda mumsewu kungakhale kovuta kwa oyendetsa galimoto ndi oyenda pansi, koma ukadaulo wamakono wa LED road lights ukupatsa apaulendo maulendo otetezeka.
Kuwala kwa msewu wa LEDndi gwero la kuwala kozizira la solid-state, lomwe lili ndi makhalidwe monga kuteteza chilengedwe, kuipitsa mpweya, kugwiritsa ntchito mphamvu zochepa, kuwala kwambiri, komanso kukhala ndi moyo wautali. Chifukwa chake, kuwala kwa msewu wa LED kudzakhala chisankho chabwino kwambiri pakukonzanso magetsi a pamsewu osawononga mphamvu. Kuwala kwa msewu wa LED ndi gwero la kuwala lolimba la solid-state lomwe limagwiritsa ntchito mphamvu zambiri pogwiritsa ntchito semiconductor pn junction, lomwe limatha kutulutsa kuwala ndi mphamvu yamagetsi yofooka. Pansi pa voteji inayake ya bias ndi injection current, mabowo amalowetsedwa mu p-region ndipo ma elekitironi amalowetsedwa mu n-region amafalikira ku active region pambuyo pa radiative recombination ndi kutulutsa ma photon, zomwe zimasandutsa mphamvu yamagetsi kukhala kuwala mwachindunji. Kuwala kwa msewu wa LED ndi gwero la kuwala lolimba la solid-state lomwe limagwiritsa ntchito semiconductor pn junction, lomwe limatha kutulutsa kuwala ndi mphamvu yamagetsi yofooka. Pansi pa voteji inayake ya bias ndi injection current, mabowo amalowetsedwa mu p-region ndi ma elekitironi omwe amalowetsedwa mu n-region amafalikira ku active region pambuyo pa radiative recombination ndi kutulutsa ma photon, kusintha mphamvu yamagetsi kukhala kuwala mwachindunji.
Ubwino wa kuwala kwa msewu wa LED mu chifunga ndi mvula ukhoza kuwonetsedwa m'mbali zitatu:
1. Kulunjika kwa kuwala komwe kumatulutsa;
2. Makhalidwe a ma LED oyera okhala ndi mafunde a wavelength;
3. Kuchuluka kwa mafunde awa poyerekeza ndi magwero ena a kuwala.
Kusiyana pakati pa kuwala kwa LED ndi magwero ena onse a kuwala ndi kutalika kwa mphamvu komwe kumatulutsa mphamvu, ndi momwe madontho a madzi amagwirira ntchito kapena kukhudza kuwala kwa mphamvuyo, makamaka pamene kukula kwa madontho a madzi kumasintha.
Magwero a kuwala omwe amatulutsa mphamvu ya kuwala m'mafunde abuluu a spectrum yooneka, monga ma LED, amagwira ntchito bwino kuposa magwero ena a kuwala m'malo omwe sawoneka bwino.
Kuwala m'chigawo cha violet cha spectral range kumakhala ndi mafunde afupiafupi kuposa kuwala m'chigawo chofiira. Tinthu ta nthunzi ya madzi mumlengalenga nthawi zambiri timadutsa kuwala m'chigawo chachikasu-lalanje-wofiira, koma timakonda kufalitsa kuwala kwabuluu. Izi zitha kukhala chifukwa chakuti tinthu ta madzi nthawi zambiri timafanana ndi mafunde abuluu. Chifukwa chake, thambo likawala bwino mvula ikagwa kapena mpweya ukawala bwino nthawi yophukira (pamakhala tinthu tating'onoting'ono tomwe timakhala mumlengalenga, makamaka mamolekyulu ofalikira), pansi pa mphamvu yamphamvu ya mamolekyulu a mumlengalenga, kuwala kwabuluu kumabalalika kuti kudzaze thambo, ndipo thambo limawoneka labuluu. Chodabwitsa ichi chimadziwika kuti Rayleigh scattering.
Mu malo osawoneka bwino, tinthu ta m'madzi timakula kukula kwake mpaka kufika poti sitifanananso kukula ndi mafunde a kuwala kwa buluu. Pa nthawiyi, timafanana kukula ndi mafunde achikasu-lalanje-ofiira. Tinthu ta m'madzi timakonda kufalikira ndikuletsa kuwala m'mizere iyi, koma timadutsa kuwala kwa buluu. Ichi ndichifukwa chake kuwala kwa dzuwa nthawi zina kumatha kuoneka ngati buluu kapena wobiriwira chifukwa cha chifunga.
Kuyambira kukula kwa tinthu ta madzi mpaka kutalika kwa nthawi, magetsi a msewu a LED ndi chisankho chabwino kwambiri pakakhala zinthu zosawoneka bwino. Kutentha kwa mtundu ndi kapangidwe ka magetsi zimapangitsa kuti msewu ukhale wabwino kwambiri panthawi yamvula ndi chifunga. Mwa kukonza mawonekedwe, magetsi a msewu a LED amateteza misewu m'malo amvula komanso m'malo okhala ndi chifunga.
Ngati mukufuna kuwala kwa msewu wa LED, takulandirani kuti mulankhule ndi wopanga kuwala kwa msewu wa LED TIANXIANG kuti akuthandizeni.Werengani zambiri.
Nthawi yotumizira: Ogasiti-02-2023