AI Article Synopsis
- This work investigates energy harvesting from rotary motion using a Wiegand sensor that generates a voltage pulse with magnetic field reversal.
- The sensors are significant for IoT and wireless sensor networks, as they can operate independently without external power.
- The study found a linear relationship between rotational speed and energy output, achieving a maximum energy of 130 nJ per pulse and powering a self-sustained digital counter with just 38 nJ.
Article Abstract
This work explores energy harvesting from rotary motion using a Wiegand sensor, which is a magnetic sensor that induces a voltage pulse when the magnetization is reversed. The main feature of the Wiegand sensor is that a pulse is generated regardless of how slowly magnetism reversal occurs. Self-sustained sensors play major roles in advancing the Internet of Things (IoT) and wireless sensor networks (WSN). In this study, we identified a linear relationship between rotational motion, magnetic field reversal, and the rotational frequency generated by the Wiegand sensor. In addition, the maximum energy per pulse and its dependence were derived analytically. A maximum energy of 130 nJ per pulse was reported for the sensor used. We developed a single-bit, self-powered digital counter that was sufficiently driven with 38 nJ of energy. In this study, single rotations were measured without the need for external power.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7412004 | PMC |
| http://dx.doi.org/10.3390/s20143840 | DOI Listing |
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