AN INTERNET BASED INTERACTIVE EMBEDDED DATA ACQUISATION

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INTRODUCTION:
Eliminating the physical cabled connection between a data acquisition system and the data processing unit brings flexibility and robustness to every system, especially when this system is located in an industrial environment. This project investigates the possibility to build a small-sized, low-cost wireless data acquisition system with improved power saving capabilities.
The aimed computational platform is the PDA (Personal Digital Assistant) while the chosen wireless communication standard is ZigBee. Data acquisition, storage and communication are implemented in microcontroller architecture with integrated A/D converter and UART interface and an external PC. This project presents development of embedded wireless system to replace wired systems. Zigbee wireless system is developed to replace wired electrophysiology system.



With the advent of the new low-cost wireless technologies, the functionality of data acquisition systems can be enhanced eliminating the burden of cabled connection between the system itself and the data processing unit. Especially in the industrial environment, where every supplementary plug implies design and financial efforts, a wireless page link between a data acquisition module (sensor with signal conditioning and digital conversion) and a data processing unit (PC, Laptop or PDA) brings flexibility and robustness to the entire design.



COMPONENT DESCRIPTION:
Power supply:
The microcontroller and other devices get power supply from AC to Dc adapter through voltage regulator. The adapter output voltage will be 12V DC non-regulated. The 7805 voltage regulators are used to convert 12 V to 5VDC.



RS 232 CONVERTER (MAX 232N)
RS-232 was created for one purpose, to interface between Data Terminal Equipment (DTE) and Data Communications Equipment (DCE) employing serial binary data interchange. So as stated the DTE is the terminal or computer and the DCE is the modem or other communications device.