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V delu je opisan razvoj mehanizma za slednje vrtenju Zemlje. Za to temo sem se odločila, ker so profesionalni mehanizmi zelo dragi, niso pa edina rešitev. Sami lahko za dosti nižjo ceno sestavimo in sprogramiramo tak mehanizem. Osnovna ideja temelji na programiranju mikrokrmilnika, ki nadzira vrtenje koračnega motorja, le-ta pa premika desko oziroma površino, na kateri imamo fotoaparat. Prednost profesionalnih naprav je, da so zmožne natančno slediti premiku neba ves čas, pri naši rešitvi pa žrtvujemo nekaj časa nekaj natančnosti, saj se nam pojavijo določene napake zaradi konstrukcije mehanizma. Vendar pa je ta mehanizem še vedno natančen tudi po več ur, kar nam omogoči dovolj časa za fotografiranje zelo temnih in oddaljenih objektov na nočnem nebu. In this work I describe the development of a home made star tracker - a mechanism that follows the movement of the sky. I have decided for this project because the professional equipment is very expensive but it is not the only option. The cheaper solution is to make the star tracker by yourself with a relatively low budget. The basic idea is to write code for a microcontroller that controls the stepper motor which moves our camera. The big advantage of professional equipment is their full time accuracy which is something we sacrifice in our solution due to inaccuracies stemming from the way it is built. But in spite of that, our mechanism is still accurate for a few hours which gives us plenty of time to capture photos of very dark deep sky objects. |
