Desenvolvimento de uma interface bluetooth para transmissão serial em tempo real aplicada a encoders

Abstract

There are systems with rotating shafts where the need for assurance of both the correct rotation speed, of the exact angulation, or even the necessary positioning, can be extreme important. To this control the use of encoder coupled to the shaft is very common. However, there is a possible problem when referring to encoder data transmission, because this transmission is realized by means of wires and this may not be desired in some environments. This project comes then to answer to the need of the use of encoder in environments where the use of wires in the vicinity of the shaft is infeasible or undesirable, through the use of Bluetooth interface. In the developed project, the encoder data passes by a microcontroller that transmits them via Bluetooth to another microcontroller, which is responsible to for interpreting the data and to do the transmission through the RS232 protocol to the platform MATLAB/Simulink, for exhibition of the data collected. It is also possible to simultaneously exhibit the data in the MATLAB/Simulink and in an LCD display, to assist in cases where the RS232 transmission has a considerable distance and it is necessary the verification of the conditions of the shaft in shorter distance.