Zaradi pomanjkanja časa ni bila izvedena dodatna analiza o porabi in življenjski dobi ter narejen preizkus digitalnega senzorskega sistema in kalibriranje senzorjev z referenco.
3020 3040 3060 3080 3100 3120 3140 3160 3180 3200
0,0 0,3 0,6 0,8 1,1 1,4 1,7 1,9 2,2 2,5 2,8 3,1 3,3 3,6 3,9 4,2 4,4 4,7 5,0 5,3 5,6 5,8 6,1 6,4 6,7 6,9 7,2 7,5 7,8
Napetost zalogovnika [mV]
Čas delovanja [h]
Zaključek 5
Zadali smo si zgraditi učinkovit in samozadosten IoT merilnik okoljskih parametrov, ki črpa energijo iz perovskitne sončne celice in beleži njene karakteristike.
Uspešno smo razvili senzorsko napravo s porabo pod 10 µA in njen sprejemnik. Pokazali smo samostojen zagon in črpanje energije iz PSC, v točki maksimalne moči, od 400 mV navzgor.
Načrpano energijo smo skladiščili v obliki naboja na superkondenzatorju na vhodu vezja, katerega napetost se je s količino energije spreminjala v razponu nazivne napetosti uporabljeneg procesorja in ostalih komponent. Demonstrirali smo večurno delovanje brez razpoložljive svetlobe. Zbrana energija je bila uporabljena za merjenje intenzitete svetlobe in I-U karakteristike PSC. Za prenos merjenih podatkov na sprejemnik, njihov prikaz in beleženje smo uporabili BLE v načinu enosmerne komunikacije.
Demonstrirana IoT naprava dokazuje, da komercialno dosegljive rešitve na trgu že omogočajo izgradnjo praktične naprave z napajanjem s PSC. Dosežena učinkovitost, skupaj z visokim izkoristkom PSC pomeni, da je tehnologija perovskitnih sončnih celic primerna za aplikacije z omejeno sončno energijo ali velikostjo.
40 Zaključek
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Dodatek
46 Dodatek
Priloga A Shema testnega napajalnega vezja 47
Priloga A Shema testnega napajalnega vezja
48 Priloga A Shema testnega napajalnega vezja
Priloga B Uspešen zagon napetostnega dodajalnika MAX17220 iz simulirane PSC 49
Priloga B Uspešen zagon napetostnega dodajalnika MAX17220 iz simulirane PSC
Slika B.1 prikazuje zagon MAX17220, z mejno vrednostjo vhodnega toka in kapacitivnosti, za uspešen zagon.
Slika B.1: Uspešen zagon napetostnega dodajalnika. Izhodna napetost (viola), vhodna (rumena) in signal za omogočanje delovanja napetostnega dodajalnika (modra).
─ Vhod
─ Izhod
─ Omogočanje dodajalnika
50 Priloga B Uspešen zagon napetostnega dodajalnika MAX17220 iz simulirane PSC
Priloga C Program za sprejemanje podatkov 51
Priloga C Program za sprejemanje podatkov
Slika C.1 prikazuje LabVIEW program, uporabljen za beleženje in prikazovanje podatko na sprejemniku. Program zaženemo s povezavo z BLE modulom. Začne se iskanje razpoložljivih naprav. Ko je zaznan promocijski paket naprave s poznanim naslovom, se ta shrani in sprocesira. Sprejeti podatki se beležijo. Uporabnik jih shrani v zunanji dokument z gumbom »SAVE«.
Slika C.1: Prikazovalnik meritev.
52 Priloga C Program za sprejemanje podatkov
Priloga D Shema končnega vezja 53
Priloga D Shema končnega vezja
54 Priloga D Shema končnega vezja
Priloga D Shema končnega vezja 55
56 Priloga D Shema končnega vezja
Priloga D Shema končnega vezja 57
58 Priloga D Shema končnega vezja