Računalniško krmiljenje fotostimulatorja v povratni zanki z odgovorom fotoreceptorjev

Horvat, Katja (author), Kononenko, Igor (mentor), Belušič, Gregor (co-mentor)

Fotostimulator je sistem za proizvajanje definiranih svetlobnih dražljajev pri raziskavah vida. Sistem je sestavljen iz več avtonomnih komponent; žarnice, monokromatorja, sivega klina, polarizatorja in komponent, ki so zadolžene za prenos, pretvorbo in interpretacijo zajetih informacij. Diplomska naloga obravnava izdelavo kontrolnega sistema sivega klina. Komponenta, ki nadzoruje intenziteto projicirane svetlobe, je nadalje razdeljena na 5 manjših, med seboj povezanih delov. Intenziteto projicirane svetlobe nastavlja sivi klin, ki je vpet na trak, ki ga poganja koračni motor. Koračni motor z vzbujanjem signalov krmili gonilnik koračnega motorja, ki informacije dobi iz mikrokrmilniške ploščice Arduino. V Arduinu se nahaja logika za nastavitev in nadzor sistema sivega klina. Prvi del diplomske naloge opisuje zgradbo in delovanje fotostimulatorja. V drugem delu se diplomska naloga osredotoča na komponento za kontrolo sivega klina.

• Language: Slovenian
• Keywords: Arduino, povratna zanka, fotoreceptor, signal, sivi klin
• Work type: Bachelor thesis/paper
• Organization: FRI - Faculty of Computer and Information Science
• Year: 2014
• PID: 20.500.12556/RUL-29450
• Publication date in RUL: 11.09.2014

Secondary language

• Language: English
• Title: Computer controlled feedback loop between the light stimulation and the photoreceptor response

Abstract

Photostimulator is a system for the delivery of defined light stimuli for vision research. The system consists of several autonomous components; light bulb, monochromator, continuously variable neutral density filter, polarizer and the components, designed for transfer and interpretation of captured data. The first part of the thesis deals with implementation of density filter control system. The component, designed for controlling the intensity of projected light, consists of 5 smaller, coherent parts. The neutral density filter, attached to a linear rail, which is driven by stepper, sets the intensity of projected light. The stepper is controlled by a stepper driver, which gets the data from the Arduino Due microcontroller board. All logic, for setting and controlling the density filter system, is contained within Arduino. The first part of the thesis describes the composition and functioning of system. In the second part, the thesis focuses on the density filter control system.

• Keywords: Arduino, feedback loop, photoreceptor, signal, density filter