Pukar Maharjan, Sanghyun Lee, Trilochan Bhatta, Gagan B. Pradhan, Kumar Shrestha, Seonghoon Jeong, SM Sohel Rana, and Jae Yeong Park
In industry 4.0, continuous condition monitoring is essential to keep the system well maintained and stable. However, current monitoring systems demand periodic replacement/recharging of batteries. Herein, a compact vibration-driven intelligent power module is proposed with excellent energy harvesting and self-powered vibration sensing capability for industrial 4.0 IoT applications. By implementing newly designed 3D printed flat-circular Z-shaped springs, excellent performance is achieved from electromagnetic vibration energy harvester (VEH), whereas the integrated triboelectric-based self-powered vibration sensor (SVS) on springs is used for real-time detection and monitoring of machinery vibration conditions simultaneously. VEH can deliver a maximum peak power of 1.95 W at 16 Hz and demonstrates excellent performance under a wide range (10-100 Hz), whereas SVS exhibits an excellent vibration sensitivity (2.85 V Hz–1, 3.41 V s2 m–1). The module is structurally and dimensionally like a standard D-battery consisting of VEH, SVS, power management circuit (PMC), rechargeable Li-Ion battery, and universal serial bus type-c port (USB-C). The module can sufficiently charge a built-in battery from industry-standard air-pump motor and car engine vibrations such that the harvested energy from automobile engine vibration is successfully utilized to power multiple sensors (temperature, humidity, and pressure) and wireless transmission circuitries to realize a self-powered smart wireless condition monitoring system.
The human body continuously emits physiological and psychological information from head to toe. Wearable electronics capable of noninvasively and accurately digitizing this information without compromising user comfort or mobility have the potential to revo...
Maintaining clean and fresh pool water requires regular monitoring and treatment. However, the employed methods are manual, complex, and time-consuming. Herein, we proposed a self-sustainable autonomous smart pool monitoring system that can continuously mon...
The prevailing energy harvester utilizes a convectional magnet that limits the output power due to the imperfect coupling of the flux linkage and the leakage of the magnetic fluxes away from the coil. Herein, a circular Halbach array magnet comprising the a...
The contactless triboelectric nanogenerator with the capability of touchless interactions has become extremely fascinating for applications in health care, remote security, and augmented reality. Herein, a Siloxene/Ecoflex nanocomposite-based high-performan...
The development of a highly sensitive pressure sensor with a wide linear range is an emerging technological goal in the area of electronic skin (e-skin). Several studies have focused on imitating tactile perception closer to natural skin, however, there rem...