20.500.12556/DKUM-9993 ZAJEMANJE IN OBDELAVA SIGNALOV PRI ELEKTRONSKEM KOMPASU ACQUISITION AND PROCESSING OF ELECTRONIC COMPASS SIGNALS V diplomski nalogi smo realizirali elektronsko kompenziran kompas. Na začetku smo podali vse pojme, ki jih moramo poznati za izdelavo kompasa. Nato smo opisali senzorje za merjenje magnetnega polja ter MEMS pospeškometer, s pomočjo katerega izračunamo nagib kompasa. V nadaljevanju smo predstavili še delovanje elektronsko kompenziranega kompasa, ter postopek pretvorbe izmerjenih komponent ZMP in kota nagiba v vodoravne komponente. Signale magnetnega senzorja smo zajemali z AD pretvornikom, ki je integriran v mikrokrmilniku. Težava pri zajemanju teh signalov je v tem, da vsebujejo šum in nedeterminirano preostalo napetost, ki je za faktor 10-krat večja od koristnega signala. Internemu AD pretvorniku smo z metodo prevzorčenja in decimacije izboljšali ločljivost iz 12 na efektivnih 16 bitov. Dobljene signale pa smo filtrirali še z nizkopasovnim digitalnim Butterworthovim filtrom 2. reda. Da bi se prepričali o učinkovitosti te metode smo za referenco uporabili zunanji 16 bitni AD pretvornik, ter rezultate primerjali še s precizijskim digitalnim instrumentom. In this diploma work the tilt compensated electronic compass was implemented. First, all important terms for the compass implementation were explained. Then sensors for magnetic field measurement and MEMS accelerometers were reviewed. Further, the principle of electronic compensated compass and the method of measured earth magnetic field components and position angle transformation into horizontal components were given. The magnetic sensor signal components were acquired by A/D-converter, integrated on microcontroller. The problem was noise that is contained in acquired signal and offset voltage, which is 10-times greater then useful signal. Used intern A/D-converter resolution was improved from 12 to effective 14 numbers of bits with over-sampling and decimation method. Such obtained signals were additionally filtered by second order low pass Butterworth filter. To verify our method, the obtained results were compared with results obtained by extern 16-bit A/D-converter and additional by precision digital instrument. elektronsko kompenziran kompas magnetometer MEMS pospeškometer prevzorčenje in decimacija povečanje ločljivosti AD pretvornika digitalna obdelava signalov tilt compensated electronics compass magnetic sensor MEMS accelerometer oversampling and decimation AD conversion resolution improvement digital signal processing true true false [M. Šparakl] Slovenski jezik Angleški jezik Diplomsko delo 2009-03-19 13:19:15 2009-03-25 07:48:07 2022-04-11 15:54:36 2022-04-15 03:32:30 2009 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 537.612:621.317.49(043.2) 13302038 URN:SI:UM:DK:0XHVQDLV UNI_Sparakl_Marko_2009.pdf UNI_Sparakl_Marko_2009.pdf 1 DA9379BC0DDF561F8223C968C717C130 eb12135005db361faa01a9f2ec9faa75d1650cbfbcaf4b584d424bd112a0c8e9 b0c479a0-7c02-11eb-bb7a-00155d0001ca 20.500.12556/dkum/bd845acb-1a39-45c7-b793-c6bf00c6df1d https://dk.um.si/Dokument.php?lang=slv&id=7837 Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0