Title page for ETD etd-12202005-005049


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
  • embedded
  • wireless
Date of Defense 2005-02-23
Availability unrestricted
Abstract
The 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

systems.

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

consumption.

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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