Controle e automação do sistema de ajuste de potência de um feixe de laser

Abstract

This work deals with the control and automation of the Federal University of Technology of Parana Photonics Laboratory’s laser beam power adjustment system. The steps that compose ´ the adjustment procedure are: blocking the laser beam, positioning the optical power sensor, reading the power display measure and controlling a attenuating disc’s angular position. Stepper motors, the PIC 16F877A microcontroller and the software LabVIEW were chosen for the development of the automatic system. A master program was developed in this software and a slave program for the PIC which executes the peripherals commands. A printed circuit board (PCB) was made containing serial communication e power circuit drive for the powering and command of the motors. The automated system was delivered to the FOTON operational, fully integrated with the three-dimensional positioning system to which it is subordinated and has TCP/IP communication