Abstract
The adaptable monitoring of the ubiquitous magnetic field is of great importance not only for scientific research but also for industrial production. However, the current detecting techniques are unwieldly and lack essential mobility owing to the complex configuration and indispensability of the power source. Here, we have constructed a self-powered magnetic sensor based on a subtle triboelectric nanogenerator (TENG) that consists of a magnetorheological elastomer (MRE). This magnetic sensor relies on triboelectrification and electrostatic induction to produce electrical signals in response to the MRE’s deformation induced by the variational magnetic field without using any external power sources. The fabricated magnetic sensor shows a fast response of 80ms and a desirable sensitivity of 31.6 mV/mT in a magnetic field range of 35–60 mT as well as preliminary vectorability enabled by the multichannel layout. Our work provides a new route for monitoring dynamic magnetic fields and paves a way for self-powered electric-magnetic coupled applications.
Highlights
Gonzalez Estevez andThe magnetic field is a vector quantity, which means that it has both magnitude and direction
Since triboelectric nanogenerator (TENG) has a high sensitivity to mechanical triggering, many self-powered sensors based on TENG have been designed [16,24,33–38]
The emerging Fe originated from the mixed ferruginous powder, with the observed C and O elements resulting from the styrene ethylene butylene styrene (SEBS) polymer
Summary
The magnetic field is a vector quantity, which means that it has both magnitude and direction. There are many methods used to measure magnetic fields, such as magnetic force, hall effect, fluxgate, magnetic resonance, and superconductivity effects. Since TENG has a high sensitivity to mechanical triggering, many self-powered sensors based on TENG have been designed [16,24,33–38]. We designed a self-powered magnetic field monitoring sensor. In order to measure the strength and direction of the magnetic field, a self-powered sensor based on the MRE of TENG is reported in this paper. The structure and mechanism of the MRE-based TENG are described here in detail, and the material properties of the MRE and the output signals of the sensor are systematically investigated. With the assistance of a programmable platform, the newly designed pointer-based TENG structure enables excellent real-time magnetic field monitoring and unique self-powered capabilities. This work promotes the use of TENG-based sensing applications for magnetic field measurement, which has important implications for IoT, robotics, and AI
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