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Prototype energy harvesting wheel speed sensor for anti-lock braking

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3 Author(s)
Parthasarathy, D. ; Chalmers Univ. of Technol., Goteborg, Sweden ; Enoksson, P. ; Johansson, R.

An energy harvesting wireless wheel speed sensor is presented, which implements two basic functions for anti-lock braking, namely periodic transmission of wheel speed information and near real-time detection of the start/stop of wheel rotation. The prototype sensor is powered by reusing a commercially available variable reluctance electromagnetic speed sensor as an energy harvesting transducer. In an experimental setup, a maximum harvestable power of ~1 mW from the transducer (at a wheel rotational speed of ~ 300 RPM) has been measured which has been used for powering the autonomous sensor. Each recurrent operation in the (prototype) autonomous sensor consumes a maximum of ~23 mW of power in bursts for ~3 ms, and a simple statistical model of wheel behavior has been proposed based on which the average power consumption of the sensor has been calculated.

Published in:

Robotic and Sensors Environments (ROSE), 2012 IEEE International Symposium on

Date of Conference:

16-18 Nov. 2012