Bluetooth Based Data Acquisition System

Abstract

Data acquisition systems are devices used to collect information to document or analyze some physical phenomenon such as voltage, force or temperature. Data acquisition systems available in the market are very expensive, bulky and power hungry. However, PC based data acquisition system offers a lot of benefit in terms of processing speed, display resolution and connectivity capabilities. The Project aims at designing and implementing a portable, economical and power efficient real-time data acquisition system. The proposed system comprises of a hardware circuitry and a Graphical User Interface (GUI) based on MATLAB environment. The hardware device consist of an 8-bit microcontroller interfaced with a serial ADC chip and a Bluetooth serial module. The Bluetooth HC-05 module is used to provide a wireless connectivity between the hardware and the PC. For testing purpose, the sampling rate of ADC is set to 833 Hz, capturing 50 values per 0.06 second. Whereas on the PC side, the GUI receives the sampled values transmitted by the hardware device and plots the real-time signal waveform. It has been found that the GUI plots the signal waveform with good quality and efficiency. The proposed system can be deployed in number of industrial application such as remote device controlling and ECG data acquisition with some adjustments in the hardware. The wireless connectivity reduces the complexity of cables and probability of occurrences of the accidents in industrial areas.