Abstract
Detecting internal physical changes in an electronic device (e.g., a smartphone, smart watch, wearable device) may be difficult with some conventional methods, and is often limited to chemical or electrical monitoring that fails to detect structural changes. A system can perform a mechanical resonant frequency analysis using existing hardware components, such as a haptic actuator and one or more sensors (e.g., an accelerometer, a microphone). The haptic actuator can be configured to generate a vibrational stimulus across a range of frequencies, while the sensors can measure the device's corresponding response. This measured response data can be processed to generate a frequency response profile, which can then be compared against a stored baseline profile representing a nominal structural state. Deviations between the current and baseline profiles, such as shifts in resonant frequencies or changes in damping, may provide a non-invasive technique for early detection of structural changes within the device. These changes can include battery swelling, adhesive failure, component loosening, or liquid ingress.
Publication Date
2026-01-05
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
She, Alan, "Change Detection in an Electronic Device Using Resonant Frequency Analysis", Technical Disclosure Commons, (January 07, 2026)
https://www.tdcommons.org/dpubs_series/9130