Prototype Performance

To evaluate the performance of the final prototype, field tests were conducted on the Northern Arizona University campus during April 2012. The actual performance was compared to the original specifications outlined by the team in the project proposal and client status updates. The results of these comparisons are presented below.

 

Project Challenges

* False alarms: the prototype triggers greater than 1 false alarm per week

*Wireless transmissions: wireless capabilities are currently not being used in the deliverable prototype

* Battery life: The original goal of 3 months battery life was not met. The prototype currently has approx. 1 month battery life.

*Error reporting: The prototype currently does not include error reporting from the sensor/preamplifer

*Time reporting: The prototype does not report time of trespasser detection to the user.

Project Successes

*GS-14 Geophone: provided by the client, and working without issue

*Detection range: The prototype can detect walking/running at a range of 3 - 14 m

*Accuracy of detection: the prototype is able to detect footsteps correctly 90% of the time at 5 m

*Size/weight restriction: The prototype is currently under desired weight and size requirements

*Speed reporting: Approx. speed of the trespasser is reported to the user upon detection

*Weatherproofed enclosure: the prototype is housed in a NEMA certified water and weather proof enclosure

*User Interface Clarity: The user interface is clear and obvious to the user.

*Location identification: the location of the trespasser is reported to the user

*Budget: the project at completion was under the proposed budget

*Documentation: the project is well documented for the intended user as well as future development.