20.500.12556/RUL-99787 Merilni sistem za Charpy-jev preizkus Measurement system for Charpy impact test Charpyjev udarni preizkus se izvaja z namenom določitve udarne žilavosti preizkušanca. Preizkus poteka tako, da Charpyjevo kladivo dvignemo v začetno lego in pustimo da zaniha. Na poti kladivo zadane ob preizkušanec in ga zlomi. Razlika med začetno in končno višino kladiva je vloženo delo za porušitev preizkušanca. Naprava je bila prvotno razvita z namenom preizkušanja kovinskih materialov, vendar se danes vse več uporablja tudi za umetne mase. V večini primerov se v praksi uporabljajo naprave z analognim prikazom rezultatov, ki zagotavljajo le omejeno ločljivost, nadomeščajo pa jih cenovno dražje naprave z digitalnim izpisom rezultata. V diplomski nalogi smo predstavili nov merilni sistem narejen na podlagi mikrokrmilnika za procesiranje informacij in dajalnika zasuka za merjenje kota, ki ga je moč pritrditi na napravo za Charpyjev preizkus. Zasnova merilnega sistema se je pričela z izdelavo prototipnega vezja, sledila je izdelava tiskanega vezja in na koncu postopek programiranja mikrokrmilnika. Rezultat je merilni sistem, ki izpisuje udarno delo z zadovoljivo točnostjo. The Charpy impact test is performed to determine the notch toughness. The test is carried out in such a way that the Charpy impact pendulum is lifted to the starting height and allowed to swing. On the way, the pendulum hits the specimen of material and breaks it. The difference between the initial and final height of the pendulum is the energy absorbed by the fracture event. The device was originally developed for the purpose of testing metal materials, but today it is increasingly used for plastics. In most cases devices with an analogue display of results are being used in practice, but they provide only limited resolution, that’s why they are being replaced by more expensive devices with digital output results. In this thesis, we introduced a new measurement system based on a microcontroller for information processing and a rotary encoder for measuring the angle. The measurement system can be attached to a Charpy impact test device. The design of the measuring system started with the production of a prototype circuit and was followed by the production of a printed circuit board. Finally, a microcontroller was programmed. The result is a measuring system that prints impact energy with satisfactory accuracy. Charpyjev udarni preizkus mehanski preizkus udarno delo merilni sistem dajalnik zasuka mikrokrmilnik. Charpy impact test mechanical test impact energy measurement system rotary encoder microcontroller. true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2018-02-16 07:15:08 2018-02-16 07:15:14 2023-12-01 08:57:01 0000-00-00 00:00:00 2018 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 204323 963.pdf 963.pdf 1 2A01B7D38CD2950630A6C1C4AAC528D7 1c2233a55811ed7dc8d5029168723e8aa7e26698eac6d3e8962f106aa8d051a2 a2316a89-a1b4-11eb-a523-00155dcfd717 20.500.12556/rul/7dafe102-020b-4f79-b61a-72b62293181a https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=109380 965.pdf 965.pdf 1 62BF73304D602697F5B002AAFB13FD9E 0a5aca13652153fe561ec239d3183efaa2d9b60d3265d17766e207b9134bc832 a24218ef-a1b4-11eb-a523-00155dcfd717 20.500.12556/rul/58e173f9-7b22-4b68-8952-50717bc2b9a0 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=109381 Fakulteta za strojništvo 0 0 0