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Source Localization on Solids Utilizing Logsitic Modeling of Energy Transition in Vibration Signal

Citation Author(s):
Quang Hanh Nguyen, V. G. Reju, Andy W. H. Khong
Submitted by:
Quang Hanh Nguyen
Last updated:
20 March 2016 - 2:22am
Document Type:
Document Year:
Nguyen Quang Hanh


We propose a new algorithm for source localization on rigid surfaces, which allows one to convert daily objects into human-computer touch interfaces using surface-mounted vibration sensors. This is achieved via estimating the time-difference-of-arrivals (TDOA) of the signals across the sensors. In this work, we employ a smooth parametrized function to model the gradual noise-to-signal energy transition at each sensor. Specifically, the noise-to-signal transition is modeled by a four-parameter logistic function. The TDOA is then estimated as the difference in time shifts of the functions fitted to the sensor data. Experiment results show that the proposed algorithm significantly outperforms existing techniques which adopt the abrupt change model for time-of-arrival estimation.

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