Sensor Networks:
Transient Event Detection and Syncronization
EE401/EE402 - Spring 2007


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Monday, 30 April 2007

Here is a digital copy of our final report: Sensor Network Node Synchronization and Transient Event Detection
The code can be also be found here:

TABLE OF CONTENTS

Title
Abstract                                                                                  i
Table of Contents                                                                     ii
List of Figures                                                                           iii
I.        Introduction
I.I.      Wireless Sensor Network Applications 1
I.II.     Crossbow TelosB: Supporting Hardware of the Network       3
I.III.    UC-Berkeley’s TinyOS: Programming Model for WSNs            5
II.       Summary of Previous Work                                               6
III.      Hardware/Software Design                                            (7-20)
III.I.    Microphone Amplification Circuit                                        7
III.II.   Time-of-Arrival Offset Calculation                                       8
III.III.   Localization Method                                                       13
III.IV.   Experimental Results                                                      17
IV.      Conclusions and Future Work
Possibilities for future work                                                         21
References                                                                              22
Bibliography                                                                             23
Appendix A: Costs Related to Project                                          24

Wednesday, 7 February 2007

Deployment of the first edition of this semester's website. We will post updated notes as we get them. Looking to get to the rifle range to test our detection algorithm/ability in a "real-life" situation. We're looking at sometime in the next couple weeks for that.

Friday, 2 February 2007

Met with professors to discuss current progress. Provided a working demo of the current transient detection algorithm. While not dialed in yet, we have a couple ideas already for improvement:

  • Put a zener diode on the output of the amplifier to prevent the amplified signal from ever going above 3v. Currently, strong forces can trigger a 9v pulse to the ADC port on our telosB mote causing it to reboot.
  • Try different kinds of coverings on the microphone to limit the influence of wind or air disruption around the microphone.

Colorado State University -- Sensor Networks Senior Design Project -- EE402

Denney Liptak & Scott Oliver