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View article: MMFW-UAV dataset: multi-sensor and multi-view fixed-wing UAV dataset for air-to-air vision tasks
MMFW-UAV dataset: multi-sensor and multi-view fixed-wing UAV dataset for air-to-air vision tasks Open
We present an air-to-air multi-sensor and multi-view fixed-wing UAV dataset, MMFW-UAV, in this work. MMFW-UAV contains a total of 147,417 fixed-wing UAVs images captured by multiple types of sensors (zoom, wide-angle, and thermal imaging s…
View article: Fluid Flow-Based Vibration Energy Harvesters: A Critical Review of State-of-the-Art Technologies
Fluid Flow-Based Vibration Energy Harvesters: A Critical Review of State-of-the-Art Technologies Open
Energy harvesting technology plays an important role in converting ambient energy into useful electrical energy to power wireless sensing and system monitoring, especially for systems operating in isolated, abandoned or embedded locations …
View article: A multi-stable rotational energy harvester for arbitrary bi-directional horizontal excitation at ultra-low frequencies for self-powered sensing
A multi-stable rotational energy harvester for arbitrary bi-directional horizontal excitation at ultra-low frequencies for self-powered sensing Open
A rotational multi-stable energy harvester has been presented in this paper for harnessing broadband ultra-low frequency vibrations. The novel design adopts a toroidal-shaped housing to contain a rolling sphere magnet which absorbs mechani…
View article: A miniaturized statically balanced compliant mechanism for on-chip ultralow wide-bandwidth vibrational energy harvesting
A miniaturized statically balanced compliant mechanism for on-chip ultralow wide-bandwidth vibrational energy harvesting Open
This research demonstrates a miniaturized statically balanced compliant mechanism (SBCM) at the micro-electromechanical systems (MEMS) scale. The primary objective is to integrate the MEMS-scale SBCM on chip as the fundamental structure of…
View article: A seesaw-inspired bistable energy harvester with adjustable potential wells for self-powered internet of train monitoring
A seesaw-inspired bistable energy harvester with adjustable potential wells for self-powered internet of train monitoring Open
Energy harvesting provides a potential solution to power distributed sensors for train condition monitoring in a self-sustained manner, but the broadband and random nature of the available vibration energy makes effective energy harvesting…
View article: A multi-stable ultra-low frequency energy harvester using a nonlinear pendulum and piezoelectric transduction for self-powered sensing
A multi-stable ultra-low frequency energy harvester using a nonlinear pendulum and piezoelectric transduction for self-powered sensing Open
This paper presents the design, theoretical modelling and experimental validation of a quad-stable energy harvester for harnessing ultra-low frequency random motions using a nonlinear pendulum and piezoelectric transduction. The multi-stab…
View article: A bistable rotary-translational energy harvester from ultra-low-frequency motions for self-powered wireless sensing
A bistable rotary-translational energy harvester from ultra-low-frequency motions for self-powered wireless sensing Open
This paper presents the design, theoretical modelling and experimental study of a bi-stable energy harvester (EH) using rotary-translation motion for ultra-low frequency and low excitation amplitude energy sources. A spherical magnet is ad…
View article: Small excitation self-powered sensing energy harvester for rail traffic condition monitoring
Small excitation self-powered sensing energy harvester for rail traffic condition monitoring Open
A small excitation bistable vibration energy harvester for railway transportation is developed for self-powered condition monitoring utilizing low-frequency vibration of key train components. Analyze operational vibration data collected fr…
View article: A self-tuned rotational vibration energy harvester for self-powered wireless sensing in powertrains
A self-tuned rotational vibration energy harvester for self-powered wireless sensing in powertrains Open
During conversion between mechanical and electrical energy within a machine, or vice-versa, vibrations (or perturbations of the rotational speed) are usually present. These vibrations can be converted into relatively small but useful amoun…
View article: An Ultra-Low Frequency Magnet-Tethered Vibration Energy Harvester for Self-Powered Sensing
An Ultra-Low Frequency Magnet-Tethered Vibration Energy Harvester for Self-Powered Sensing Open
Wireless sensors face challenges regarding power supply and maintenance when batteries are used. To provide an effective solution, this paper presents a bistable energy harvester capable of exploiting ultra-low frequency vibration to energ…
View article: Blind source extraction based on EMD and temporal correlation for rolling element bearing fault diagnosis
Blind source extraction based on EMD and temporal correlation for rolling element bearing fault diagnosis Open
Purpose Fault diagnosis methods based on blind source separation (BSS) for rolling element bearings are necessary tools to prevent any unexpected accidents. In the field application, the actual signal acquisition is usually hindered by cer…
View article: Two Paradigms Of Emergency Power: Hong Kong's Liberal Order Meeting The Authoritarian State
Two Paradigms Of Emergency Power: Hong Kong's Liberal Order Meeting The Authoritarian State Open
Article 18(4) of the Basic Law creates a dual emergency power: the internal emergency power of the Hong Kong Special Administrative Region (HKSAR) and the external emergency power of the Standing Committee of the National People’s Congress…
View article: A Convolutional Neural Network for Impact Detection and Characterization of Complex Composite Structures
A Convolutional Neural Network for Impact Detection and Characterization of Complex Composite Structures Open
This paper reports on a novel metamodel for impact detection, localization and characterization of complex composite structures based on Convolutional Neural Networks (CNN) and passive sensing. Methods to generate appropriate input dataset…
View article: Electrode Coverage Optimization for Piezoelectric Energy Harvesting from Tip Excitation
Electrode Coverage Optimization for Piezoelectric Energy Harvesting from Tip Excitation Open
Piezoelectric energy harvesting using cantilever-type structures has been extensively investigated due to its potential application in providing power supplies for wireless sensor networks, but the low output power has been a bottleneck fo…
View article: Rotational energy harvesting for low power electronics
Rotational energy harvesting for low power electronics Open
Energy harvesting is one of the key technologies for the realization of autonomous sensing. The aim of this thesis is to develop low-frequency broadband rotational energy harvesting solutions for self-powered sensing. As an example of rota…
View article: Broadband Rotational Energy Harvesting with Non-linear Oscillator and Piezoelectric Transduction
Broadband Rotational Energy Harvesting with Non-linear Oscillator and Piezoelectric Transduction Open
Rotational energy is widely distributed in many industrial and domestic applications, such as ventilation systems, moving vehicles and miniature turbines. This paper reports the design and implementation of a bi-stable rotational energy ha…
View article: A miniaturized piezoelectric turbine with self-regulation for increased air speed range
A miniaturized piezoelectric turbine with self-regulation for increased air speed range Open
This paper presents the design and demonstration of a piezoelectric turbine with self-regulation for increased air speed range. The turbine's transduction is achieved by magnetic “plucking” of a piezoelectric beam by the passing rotor. The…
View article: A Miniature Radial-Flow Wind Turbine Using Piezoelectric Transducers and Magnetic Excitation
A Miniature Radial-Flow Wind Turbine Using Piezoelectric Transducers and Magnetic Excitation Open
This paper presents a miniature radial-flow piezoelectric wind turbine for harvesting airflow energy. The turbine's transduction is achieved by magnetic "plucking"of a piezoelectric beam by the passing rotor. The magnetic coupling is forme…
View article: Energy Harvesting from Human Motion Using Footstep-Induced Airflow
Energy Harvesting from Human Motion Using Footstep-Induced Airflow Open
This paper presents an unobtrusive in-shoe energy harvester converting foot-strike energy into electricity to power wearable or portable devices. An air-pumped turbine system is developed to address the issues of the limited vertical defor…
View article: Energy Harvesting from Human Motion Using Footstep-Induced Airflow
Energy Harvesting from Human Motion Using Footstep-Induced Airflow Open
This paper presents an unobtrusive in-shoe energy harvester converting foot-strike energy into electricity to power wearable or portable devices. An air-pumped turbine system is developed to address the issues of the limited vertical defor…