Prototype energy harvesting wheel speed sensor for anti-lock braking
Paper in proceedings, 2012

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


Dhasarathy Parthasarathy

Chalmers, Applied Physics, Electronics Material and Systems Laboratory

Peter Enoksson

Chalmers, Applied Physics, Electronics Material and Systems Laboratory

Rolf Johansson

Volvo Group

MME 2012, Micromechanics and Microsystems Europe Workshop September 9 - 12, 2012, Ilmenau, Germany


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