Zasnova in izvedba optične tarče

PAVKOVIČ, MARTINA (author), Vončina, Danjel (mentor), Vencelj, Matjaž (co-mentor)

Cilj magistrske naloge je bil razviti optično občutljivo tarčo za lasersko pištolo za varen strelski trening doma. Na tarčo streljamo z laserskim žarkom, ki je amplitudno moduliran s frekvenco 1 kHz. Laserska svetloba se odbije od difuzno bele tarčne ploščice do štirih simetrično postavljenih fotodiod. Dobljene štiri signale vzorčimo z okoli 40k vzorci na sekundo, se fazno vpnemo na njihovo vsoto, izprojiciramo njihove amplitude in jih preračunamo v položaj laserske pike na tarčni ploščici. Na ta način smo dosegli 1,2 mm ločljivost lege laserske pike.

• Language: Slovenian
• Keywords: PIN-fotodioda, elektronska tarča, PLL
• Work type: Master's thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2018
• PID: 20.500.12556/RUL-100567
• Publication date in RUL: 28.03.2018

Secondary language

• Language: English
• Title: Design and implementation of an optical target

Abstract

The purpose of the thesis was to develop an optically sensitive target for a laser gun for safe sports shooting training at home. The target is shot at with a laser beam modulated at 1 kHz. The laser light scatters off a diffuse white target disc and arrives at four symmetrically positioned photodiodes. We sample the four signals at 40 kS/s, phase-lock on their sum and calculate their amplitudes. By comparing the amplitudes we determine the position of the laser spot on the target disc. In this way we achieved a 1.2 mm resolution of the laser spot position.

• Keywords: PIN-photodiode, electronic target, PLL