Vibration Analysis of a Mobile Phone

Reference coordinates and contour of the mobile phone.

This article describes the measurement and analysis of the operation deflection shapes and rigid body vibration motions of a mobile phone excited by its vibration alert. The measurement is done using a non-contact, 3D, full-field, high-speed stereo image correlation system in combination with the new VIC-3D FFT module that analyzes the recorded deformation data in the frequency domain by phase-separation method.

The measured deformations and displacements during the vibration alert are evaluated against the reference state for each stereo image pair. In this case the recording time covers about 5.5 seconds with 1000 FPS corresponding to about 5500 single measurements.

The following figure shows the average vibration amplitude U.