EKINSTITUTE.COM:
Structural System Identification and Acceleration Record Manager, Smartphone Module.
For information, please scroll below.
CONTENT:
1. Instructions
2. Background
3. Developer
1. INSTRUCTIONS:
This application enables smartphone users to obtain accelerometer time history in a single direction (either x, y, or z axis determined by the segmented control on lower right corner-default axis is z-axis which is normal to the phone surface) with a sampling rate of 100 Hz in g units. Users can start and stop recording by touching Record/Stop button. Once the recording process is completed, acceleration time history will be provided as a data column on the right hand side of the screen. Users can delete the existing data by pressing Refresh button. Web view on the lower left screen provides the gateway to the web platform, www.ekinstitute.com which provides users a database and a server-sided signal processing tool to save and process their vibration data in an online fashion. (see Background section below). Researchers, engineers, students and hobbyists are highly encouraged to contact the developer to request web-based platform access (see Developer section for contact information).
2. BACKGROUND
Ekinstitute.com is a web-based platform that users can submit vibration time history data, get the modal identification results, store the time history and the analysis results. The submitted time history data is transferred into the frequency domain by applying Discrete Fourier Transform, and the peak frequency is detected based on the maximum spectral value. Such platform can be useful for engineering branches that study vibrations such as mechanical, civil and earthquake engineering. The reason is, dynamic characteristics of a structure can be identified by analyzing its vibration signals. And, peak frequency of a vibration signal can be a simple, quick, and reasonable indicator of structural parameters.
3. DEVELOPER:
Ekin Ozer,
Graduate Research Assistant,
Civil Engineering and Engineering Mechanics, Columbia University, NY, US.
For information, comments, and requests, please email: eo2327@columbia.edu.