The Experts below are selected from a list of 26904 Experts worldwide ranked by ideXlab platform
Rusen Yang - One of the best experts on this subject based on the ideXlab platform.
-
a spring assisted hybrid triboelectric electromagnetic nanogenerator for harvesting Low Frequency Vibration energy and creating a self powered security system
Nanoscale, 2018Co-Authors: Weichao Wang, Haiwu Zheng, Fangqi Chen, Kory Jenkins, Heyi Wang, Weifeng Zhang, Rusen YangAbstract:With the rapid development of portable electronics, exploring sustainable power sources is becoming more and more urgent. Utilizing a nanogenerator to harvest ambient mechanical energy could be an effective approach to solve this challenge. In this work, a novel spring-assisted hybrid nanogenerator (HG) consisting of a triboelectric nanogenerator (TENG) and an electromagnetic generator (EMG) was developed for harvesting Low-Frequency Vibration energy. The results show that the TENG with a PTFE surface nanostructure has better output performance than that without the nanostructure. The effect of operating Frequency on the open-circuit voltage and short-circuit current of the TENG and EMG is systematically investigated. Under a 2 Hz operating Frequency, the EMG and TENG are able to produce a peak power of about 57.6 mW with a resistive load of 2000 Ω and 1682 μW with a resistive load of 50 MΩ, respectively. The impedance matching between the TENG and EMG can be realized by using a transformer to reduce the impedance of the TENG. The charging performance of the HG is much better than that of the individual EMG or TENG. The HG enabled us to develop a self-powered safety system and to power LEDs, and drive some electronic devices. The present work provides a superior solution to improve the output performance of the HG for harvesting Low-Frequency Vibration energy.
James G Colebatch - One of the best experts on this subject based on the ideXlab platform.
-
a utricular origin of Frequency tuning to Low Frequency Vibration in the human vestibular system
Neuroscience Letters, 2009Co-Authors: Neil Mcangus P Todd, Sally M Rosengren, James G ColebatchAbstract:Abstract Recent work has demonstrated that the human vestibular system displays a remarkable sensitivity to Low-Frequency Vibration. To address the origin of this sensitivity we compared the Frequency response properties of vestibular reflexes to 10 ms bursts of air-conducted sound and transmastoid Vibration, which are thought to be differentially selective for the saccule and utricle, respectively. Measurements were made using two separate central pathways: vestibular evoked myogenic potentials (VEMPs), which are a manifestation of vestibulo-collic projections, and ocular vestibular evoked myogenic potentials (OVEMPs), which are a manifestation of vestibulo-ocular projections. For both response pathways air-conducted sound and Vibration stimuli produced the same patterns of quite different tuning. Sound was characterised by a band-pass tuning with best Frequency between 400 and 800 Hz whereas Vibration showed a Low-pass type response with a largest response at 100 Hz. Our results suggest that the tuning is at least in part due to properties of end-organs themselves, while the 100 Hz best Frequency may be a specifically utricular feature.
Zhong Lin Wang - One of the best experts on this subject based on the ideXlab platform.
-
a spring based resonance coupling for hugely enhancing the performance of triboelectric nanogenerators for harvesting Low Frequency Vibration energy
Nano Energy, 2017Co-Authors: Changsheng Wu, Jie Wang, Yunlong Zi, Zhong Lin WangAbstract:Abstract Low-Frequency Vibration is a ubiquitous energy that exists almost everywhere, but a high efficient harvesting of which remains challenging. Recently developed triboelectric nanogenerator (TENG) provides a promising alternative approach to conventional electromagnetic and piezoelectric generators, with the advantage of Low cost and high output voltage. In this work, a mechanical spring-based amplifier with the ability of amplifying both the Vibration Frequency and amplitude is integrated with TENG to improve its Low-Frequency performance by up to 10 times. A new scheme for evaluating TENG using the average output power is proposed and the process of choosing an appropriate time interval for analysis is demonstrated. It takes into account the temporal variation in electrical output and offers a more accurate and convincing evaluation of TENG's performance in practical working environment compared to previously used instantaneous power. This work serves as an important progress for the future development and standardization of TENG, especially for harvesting Low-Frequency Vibration energy as well as a great prospect of blue energy.
Neil Mcangus P Todd - One of the best experts on this subject based on the ideXlab platform.
-
a utricular origin of Frequency tuning to Low Frequency Vibration in the human vestibular system
Neuroscience Letters, 2009Co-Authors: Neil Mcangus P Todd, Sally M Rosengren, James G ColebatchAbstract:Abstract Recent work has demonstrated that the human vestibular system displays a remarkable sensitivity to Low-Frequency Vibration. To address the origin of this sensitivity we compared the Frequency response properties of vestibular reflexes to 10 ms bursts of air-conducted sound and transmastoid Vibration, which are thought to be differentially selective for the saccule and utricle, respectively. Measurements were made using two separate central pathways: vestibular evoked myogenic potentials (VEMPs), which are a manifestation of vestibulo-collic projections, and ocular vestibular evoked myogenic potentials (OVEMPs), which are a manifestation of vestibulo-ocular projections. For both response pathways air-conducted sound and Vibration stimuli produced the same patterns of quite different tuning. Sound was characterised by a band-pass tuning with best Frequency between 400 and 800 Hz whereas Vibration showed a Low-pass type response with a largest response at 100 Hz. Our results suggest that the tuning is at least in part due to properties of end-organs themselves, while the 100 Hz best Frequency may be a specifically utricular feature.
Sally M Rosengren - One of the best experts on this subject based on the ideXlab platform.
-
a utricular origin of Frequency tuning to Low Frequency Vibration in the human vestibular system
Neuroscience Letters, 2009Co-Authors: Neil Mcangus P Todd, Sally M Rosengren, James G ColebatchAbstract:Abstract Recent work has demonstrated that the human vestibular system displays a remarkable sensitivity to Low-Frequency Vibration. To address the origin of this sensitivity we compared the Frequency response properties of vestibular reflexes to 10 ms bursts of air-conducted sound and transmastoid Vibration, which are thought to be differentially selective for the saccule and utricle, respectively. Measurements were made using two separate central pathways: vestibular evoked myogenic potentials (VEMPs), which are a manifestation of vestibulo-collic projections, and ocular vestibular evoked myogenic potentials (OVEMPs), which are a manifestation of vestibulo-ocular projections. For both response pathways air-conducted sound and Vibration stimuli produced the same patterns of quite different tuning. Sound was characterised by a band-pass tuning with best Frequency between 400 and 800 Hz whereas Vibration showed a Low-pass type response with a largest response at 100 Hz. Our results suggest that the tuning is at least in part due to properties of end-organs themselves, while the 100 Hz best Frequency may be a specifically utricular feature.
