Jonathan Leung '17, electrical engineering

As mobile technology continues to advance, the presence of "smart" devices is constantly increasing. According to the Pew Research Center, 64 percent of American adults own a smartphone. The capabilities of these devices reach far beyond accessing the Internet, taking photos and posting to social media. Within this project, I used the Nexus 5, a commercial Android smartphone, to record acceleration values for a series of movements. I then compared these values to data from Vicon cameras, which track position in three-dimensional space. This project is part of the KICR System (Kinematic Information Capture and Reporting), a collaborative effort between Bucknell and Geisinger Health System to deliver quantitative information to aid diagnostic techniques for neuropsychiatric disorders, namely Attention Deficit Hyperactivity Disorder (ADHD).

After several rounds of testing, Professor Thompson and I were able to draw several conclusions from the data. First, we discovered that neither the Nexus 5 nor the differentiated Vicon values were completely at zero while the phone was stationary. Secondly, a fair amount of filtering must be completed in order to gain insight from the data, as a significant amount of noise is included in both the phone and Vicon data sets.  Thirdly, there is no current threshold of accuracy the accelerometer must meet. Overall though, the results from our experiments are encouraging in terms of the accuracy of a commercial smartphone accelerometer.

Advisor: Professor Stu Thompson

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