ABSTRACT:
The Bluetooth is an open wireless technology which revolutionized the connectivity by providing freedom from wired connections. It is a cable replacement technology that has changed the face of connectivity between the communicating systems. The usage of cables in the industrial field especially in the application of autonomous systems becomes more cumbersome and any fault in the connections may lead to a total system failure. This paper presents an abstract model of Embedded Bluetooth Data Acquisition system which was designed using the ARM processor (S3C2440) as an embedded target and Bluetooth device which is connected to the ARM processor through a RS-232 serial port. In our implementation the ARM processor which acts as the Central Dta Acquisition System is used as the controlling system that controls the Bluetooth device connected to it and acquires the data from the different subsystems of a UUV. Keywords: Bluetooth data acquisition, wireless networks, Embedded systems on ARM.
1. INTRODUCTION:
Bluetooth technology is a short-range wireless communications technology. It has developed rapidly in recent years. Data acquisition which based on sensor technology, signal detection and processing, computer science technology has formed an integrated application of technology. Modern industrial controlling and data acquisition system has stepped into embedded system module from traditional circuit and microcomputer module. Embedded systems play an irreplaceable role in industrial control and data acquisition & transmission system. In response to the complexity of the cable, the occurrence of accidents and completing the task without cables in industrial field, an Embedded Bluetooth Data Acquisition System based on S3C2440 and Bluetooth chip called BlueLINK was constructed to reduce cable connection. It has some advantages, such as portability, reliability, function and application, and so on.
2. DATA ACQUISITION SYSTEM:
A. The Functionality of the Data Acquisition Module: The total functionality of the data acquisition module is such that it has to collect the information from the different subsystems of the Unmanned Underwater Vehicle into the Central Data Acquisition System for further processing and storage. This functionality is achieved by using the Bluetooth modules one at each of the subsystem and the CDAS. The CDAS sends the control commands to the subsystems to send the information collected by them to the CDAS at a timely manner. The CDAS repeats this function periodically and then the data received and processed by the CDAS is transmitted to the PC. The PC will display and dispose the data. The Bluetooth wireless data acquisition module is the most important part of this data acquisition system. An Embedded system using the ARM processor S3C2440 [2] is programmed to control the Bluetooth module. The total module can be powered up by a simple battery setup and it can also be programmed to automatically accomplish the data acquisition. The ARM processor module sends the commands to the Bluetooth chip connected to it which in turn collects the data from the respective subsystems and transfers to the ARM processor module. This data is then transferred by other means to the PC where it is displayed.


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