Type of Document Master's Thesis Author Vemishetty, Kalyanramu URN etd-12202005-005049 Title Embedded Wireless Data Acquisition System Degree Master of Science Department Mechanical Engineering Advisory Committee
Advisor Name Title Wicks, Alfred L. Committee Chair Reinholtz, Charles F. Committee Co-Chair Woolsey, Craig A. Committee Member Keywords
- data acquisition
Date of Defense 2005-02-23 Availability unrestricted AbstractThe Wake Forest University Physiology/Pharmacology (WFU Phys./Pharm.) electrophysiology
research labs currently carry out memory research by recording neural signals from laboratory
animals tethered to nearby signal conditioning and recording equipment. A wireless neural signal
recording system is desirable because it removes the cumbersome wires from the animal, allowing it
to roam more freely. The result is an animal that is more able to behave as it would in its natural
habitat, thus opening the possibility of testing procedures that are not possible with wired recording
Sampling rates obtained by conventional RF wireless systems tend to be very low (800Hz) since the
bandwidth of these RF wireless systems is low. This is because interfacing methods (RS-232) needed
to develop RF systems are slow (57.6Kbps). Another shortcoming of RF systems is the high power
This thesis presents development of embedded wireless system to replace wired systems. RF wireless
system is developed to replace wired electrophysiology system. An infrared wireless system
development is discussed to achieve higher sampling rates unachievable by RF wireless system.
Infrared operate at data rates 4Mbps and high sampling rates can be achieved. For this thesis, Infrared
system is interfaced to microcontroller using ISA interface. ISA bus is chosen as it operates (at rate of
8Mbytes/sec) faster than RS-232 and easy to program compared to other buses such as PCI. Also,
Infrared systems consume low power than RF systems. Power consumption is an important
consideration as application in hand is battery powered.
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