20.500.12556/RUL-176376 Merilnik pretoka zraka na grelno telo Hot-wire air flow meter V diplomski nalogi je podan kratek pregled merilnih principov in merilnikov za merjenje pretoka. Sledi načrtovanje in izdelava merilnika pretoka zraka z grelnim telesom. Merilnik je izdelan s pomočjo tehnologije trodimenzionalnega tiskanja, kot grelno telo je uporabljen platinast upor. Merilniku sta dodana ventilator s krmilnim vezjem in anemometer za umerjanje merilnika na volumetrični pretok zraka. Merilnik pretoka na grelno telo je karakteriziran v treh različnih načinih delovanja. V načinu krmiljenja grelnega telesa s konstantno napetostjo se meri tok pri izbranem pretoku zraka. V načinu krmiljenja grelnega telesa s konstantnim tokom se meri napetost pri izbranem pretoku zraka. V zadnjem načinu delovanja s pomočjo dodatnega regulacijskega vezja grelno telo ohranjamo na konstantni temperaturi. Pri tej metodi se pretok odraža v porabljeni moči za ohranjanje grelnega telesa na izbrani temperaturi. This thesis will be a brief review of anemometers and their measuring principles. After that, the thesis focuses on making a hot-wire anemometer for demonstrative purposes. The hot-wire anemometer will use a platinum resistor as its heating element and a three-dimensional designed outer casing. The anemometer also uses a fan and control unit to induce airflow into the system. For reference measurements, another anemometer is used. This type of hot-wire anemometer can measure airflow in three ways. If it is powered by a source of constant voltage, the current flowing through the heating element indicates the airflow. If the hot-wire anemometer is powered by a constant current source, the voltage drop on the heating element can measure airflow. The third method measures the flow of air by keeping the heating element at a constant temperature. This is achieved with a small regulatory circuit. With this constant temperature measuring method, the airflow is reflected by the power used to keep the heating element hot. Merilnik pretoka grelno telo trodimenzionalno oblikovanje krmiljenje regulacija Anemometer hot-wire three-dimensional design control unit regulation circuit true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-11-28 12:05:02 2025-11-28 12:05:15 2026-02-02 15:50:39 0000-00-00 00:00:00 2025 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 63042 267032323 Libersar_Martin_-_Merilnik_pretoka_zraka_na_grelno_telo.pdf Libersar_Martin_-_Merilnik_pretoka_zraka_na_grelno_telo.pdf 1 585568A618DD38C0069A60736243A165 2ba1ded13001d35a706610c35f8bc9b6d1f3f801a8492e26dbe946eec36643b6 bfc8a4dd-cc49-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=222689 Fakulteta za elektrotehniko 0 0 0