20.500.12556/RUL-184442 Razvoj izoliranega tiskanega vezja za merilnik tlaka v valju motorja z notranjim zgorevanjem Development of an Isolated Printed Circuit Board for an In-Cylinder Pressure Measurement System in an Internal Combustion Engine Diplomska naloga opisuje postopek načrtovanja in razvoja izoliranega tiskanega vezja za merilnik tlaka v valju motorja z notranjim zgorevanjem. Merjenje tlaka v valju omogoča spremljanje poteka zgorevanja in predstavlja pomembno osnovo za izboljšanje izkoristka motorja, zmanjšanje emisij ter zaznavanje neželenih pojavov. Ker merilno vezje deluje v zahtevnem okolju z visokimi temperaturami, vibracijami, elektromagnetnimi motnjami in velikimi tlačnimi sunki, mora biti zasnovano tako, da zagotavlja zanesljivo obdelavo signala, galvansko ločitev in ustrezno odpornost proti motnjam. Opisano je osnovno delovanje vezja in zahteve, ki jih mora izpolnjevati. Pred začetkom načrtovanja so predstavljene različne metode za izpolnitev teh zahtev. Najprej so predstavljeni izolirani napajalni pretvorniki, njihovo delovanje ter njihove prednosti in slabosti. Sledi poglavje o galvanski ločitvi in raciometričnosti. Analizirani so različni pristopi za dosego teh dveh lastnosti. V nadaljevanju je predstavljen postopek načrtovanja vezja, v katerem so podrobno opisane izbrane metode in elementi. Najprej je predstavljena izbira izoliranega napajalnega pretvornika, podrobno je opisano njegovo delovanje in določene njegove komponente. Nato sta predstavljeni in izbrani metodi za galvansko ločitev izhodnega merilnega signala ter zagotavljanje raciometričnosti glede na napajalno napetost. Izbira metod je podprta z rezultati simulacij in meritvami testnih vezij. Skladnost razvitega tiskanega vezja z zahtevami je potrjena z meritvami porabe, preverjanjem pravilnega delovanja posameznih modulov vezja ter raciometričnostjo izhodnega signala v merilnem delovnem območju. This bachelor's thesis describes the design and development of an isolated printed circuit board for an in-cylinder pressure measurement system used in an internal combustion engine. Measuring cylinder pressure enables monitoring of the combustion process and provides an important basis for improving engine efficiency, reducing emissions, and detecting undesirable phenomena. As the measurement circuit operates in a demanding environment with high temperatures, vibrations, electromagnetic interference, and large pressure fluctuations, it must be designed to ensure reliable signal processing, galvanic isolation, and adequate immunity to disturbances. The basic operation of the circuit is described first, followed by the requirements the circuit must fulfil. Before the design process begins, various methods for meeting these requirements are presented. Isolated power converters are introduced first, along with their operating principles, advantages, and disadvantages. This is followed by a chapter on galvanic isolation and ratiometricity, in which different approaches to achieving these two properties are analysed. The circuit design procedure is presented, with a detailed description of the selected methods and components. First, the selection of the isolated power converter is discussed, including a detailed explanation of its operation and the determination of its components. Next, the methods chosen for galvanic isolation of the output measurement signal and for ensuring ratiometricity with respect to the supply voltage are presented and justified. The selection of these methods is supported by simulation results and measurements performed on test circuits. Compliance of the developed printed circuit board with the specified requirements is verified by measuring power consumption, validating the correct operation of individual circuit modules, and confirming the ratiometric behaviour of the output signal within the measurement operating range. izolirano tiskano vezje merilnik tlaka v valju galvanska ločitev raciometričnost izolirano napajanje A/D pretvorba D/A pretvorba mikrokrmilnik isolated printed circuit board cylinder pressure sensor galvanic isolation ratiometricity isolated power supply A/D conversion D/A conversion microcontroller true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-07-07 14:25:26 2026-07-07 14:25:41 2026-07-09 13:09:55 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 63380 284222211 Stekar_Jan_-_Razvoj_izoliranega_tiskanega_vezja_za_merilnik_tlaka_v_valju_motorja_z_notranjim_zg.pdf Stekar_Jan_-_Razvoj_izoliranega_tiskanega_vezja_za_merilnik_tlaka_v_valju_motorja_z_notranjim_zg.pdf 1 9B66DE9E3B060657310E5EDF0C16E0D9 edd45cb30322326324cdf404831c586bac44b853102ac2fa13e77fcd70b5abd3 db68cb0e-79fe-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=237266 Fakulteta za elektrotehniko 0 0 0