2 research outputs found
Self-Powered Acceleration Sensor Based on Liquid Metal Triboelectric Nanogenerator for Vibration Monitoring
An acceleration sensor is an essential
component of the vibration
measurement, while the passivity and sensitivity are the pivotal features
for its application. Here, we report a self-powered and highly sensitive
acceleration sensor based on a triboelectric nanogenerator composed
of a liquid metal mercury droplet (LMMD) and nanofiber-networked polyvinylidene
fluoride (nn-PVDF) film. Due to the ultrahigh surface-to-volume ratio
of nn-PVDF film and high surface tension, high mass density, high
elastic as well as mechanical robustness of LMMD, the open-circuit
voltage and short-circuit current reach up to 15.5 V and 300 nA at
the acceleration of 60 m/s<sup>2</sup>, respectively. The acceleration
sensor has a wide detection range from 0 to 60 m/s<sup>2</sup> with
a high sensitivity of 0.26 V·s/m<sup>2</sup>. Also, the output
voltage and current show a negligible decrease over 200,000 cycles,
evidently presenting excellent stability. Moreover, a high-speed camera
was employed to dynamically capture the motion state of the acceleration
sensor for insight into the corresponding work mechanism. Finally,
the acceleration sensor was demonstrated to measure the vibration
of mechanical equipment and human motion in real time, which has potential
applications in equipment vibration monitoring and troubleshooting
Self-Powered Acceleration Sensor Based on Liquid Metal Triboelectric Nanogenerator for Vibration Monitoring
An acceleration sensor is an essential
component of the vibration
measurement, while the passivity and sensitivity are the pivotal features
for its application. Here, we report a self-powered and highly sensitive
acceleration sensor based on a triboelectric nanogenerator composed
of a liquid metal mercury droplet (LMMD) and nanofiber-networked polyvinylidene
fluoride (nn-PVDF) film. Due to the ultrahigh surface-to-volume ratio
of nn-PVDF film and high surface tension, high mass density, high
elastic as well as mechanical robustness of LMMD, the open-circuit
voltage and short-circuit current reach up to 15.5 V and 300 nA at
the acceleration of 60 m/s<sup>2</sup>, respectively. The acceleration
sensor has a wide detection range from 0 to 60 m/s<sup>2</sup> with
a high sensitivity of 0.26 V·s/m<sup>2</sup>. Also, the output
voltage and current show a negligible decrease over 200,000 cycles,
evidently presenting excellent stability. Moreover, a high-speed camera
was employed to dynamically capture the motion state of the acceleration
sensor for insight into the corresponding work mechanism. Finally,
the acceleration sensor was demonstrated to measure the vibration
of mechanical equipment and human motion in real time, which has potential
applications in equipment vibration monitoring and troubleshooting