20.500.12556/RUL-187858 RAZVOJ IN IZDELAVA ELEKTRONSKEGA OBRATOMERA ZA MOPED DEVELOPMENT AND IMPLEMENTATION OF AN ELECTRONIC TACHOMETER FOR A MOPED V diplomski nalogi je predstavljena zasnova in izdelava elektronskega obratomera za moped. Glavni cilj je bil izdelati obratomer, ki za merjenje števila vrtljajev ne potrebuje dodatnih zunanjih senzorjev ali večjih predelav motorja ter lahko deluje na različnih napajalnih sistemih. Za določanje števila vrtljajev je uporabljen signal odklopnika elektronskega vžiga. Ker signal zaradi svoje oblike in amplitude ni primeren za neposreden priklop na mikrokrmilnik, je obdelan s Schmittovim prožilnikom, ki ga pretvori v digitalne impulze. Mikrokrmilnik ESP32-S3 meri čas med posameznimi impulzi, iz njega določi frekvenco in posledično število vrtljajev motorja. Izračunana vrednost se prikazuje z analognim kazalcem, ki ga premika koračni motor Switec X15.589. Sistem vključuje tudi RGB LED-diode za osvetlitev skale obratomera ter stikalni napajalnik, ki omogoča napajanje elektronskih komponent. V okviru naloge so bili izdelani elektronsko vezje, programska oprema in mehanski deli obratomera. Med testiranjem je bilo ugotovljeno, da posamezni deli sistema delujejo pravilno, pri delovanju celotnega sistema pa se občasno pojavljajo motnje. Glavni izziv predstavljajo elektromagnetne motnje vžigalnega sistema in občutljivost vhodnega vezja. Kljub temu izdelani obratomer deluje, pri čemer povprečno odstopanje od referenčnih meritev z osciloskopom znaša 24 RPM, največje absolutno odstopanje pa 60 RPM. Rezultati testiranja so pokazali možnosti za nadaljnje izboljšave predvsem na področju obdelave vhodnega signala in elektromagnetne kompatibilnosti vezja. This thesis presents the design and development of an electronic tachometer for a moped. The main objective was to develop a tachometer that does not require additional external sensors or major modifications to the engine for measuring rotational speed and that can operate with different power supply systems. The signal from the electronic ignition system is used to determine the engine speed. Since its waveform and amplitude are not suitable for direct connection to a microcontroller, the signal is conditioned using a Schmitt trigger, which converts it into digital pulses. An ESP32-S3 microcontroller measures the time interval between consecutive pulses, determines the corresponding frequency, and consequently calculates the engine speed. The calculated value is displayed by an analog pointer driven by a Switec X15.589 stepper motor. The system also includes RGB LEDs for illuminating the tachometer scale and a switching power supply for powering the electronic components. As part of the thesis, the electronic circuit, software, and mechanical components of the tachometer were developed. Testing showed that the individual parts of the system operate correctly; however, occasional interference occurs when the complete system is in operation. The main challenges are electromagnetic interference generated by the ignition system and the sensitivity of the input circuit. Nevertheless, the developed tachometer is functional, with an average deviation of 24 RPM compared with reference measurements obtained using an oscilloscope and a maximum absolute deviation of 60 RPM. The test results indicate opportunities for further improvements, particularly in the areas of input signal conditioning and the electromagnetic compatibility of the circuit. obratomer moped mikrokrmilnik ESP32-S3 Schmittov prožilnik koračni motor elektronski vžig tachometer moped microcontroller ESP32-S3 Schmitt trigger stepper motor electronic ignition true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-15 13:05:02 2026-09-15 13:05:13 2026-09-16 04:30:46 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 63465 Kos_Ziga_-_RAZVOJ_IN_IZDELAVA_ELEKTRONSKEGA_OBRATOMERA_ZA_MOPED.pdf Kos_Ziga_-_RAZVOJ_IN_IZDELAVA_ELEKTRONSKEGA_OBRATOMERA_ZA_MOPED.pdf 1 2A57FD3559BF6C8F7C59E9C6467B4779 846984c94e10be3908a9709a7538bbb3797e0e5de42b91db957d74c2c9304a7c 4a9629cc-b0f5-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=247668 Fakulteta za elektrotehniko 0 0 0