scholarly journals Research and Development of a Wireless Self-Powered Sensing Device Based on Bridge Vibration Energy Collection

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8319
Author(s):  
Xinlong Tong ◽  
Yun Hou ◽  
Yuanshuai Dong ◽  
Yanhong Zhang ◽  
Hailu Yang ◽  
...  
Keyword(s):  
Integrated Circuit ◽  
High Sensitivity ◽  
Electrical Energy ◽  
Performance Comparison ◽  
Green Energy ◽  
Vibration Energy ◽  
Design Data ◽  
Package Design ◽  
Self Powered ◽  
And Performance

Traditional bridge monitoring has found it difficult to meet the current diversified needs, and frequent replacement of sensor batteries is neither economical nor environmentally friendly. This paper presents a wireless acceleration sensor with low power consumption and high sensitivity through integrated circuit design, data acquisition and wireless communication design, package design, etc. The accuracy of the sensor in data collection was verified through calibration and performance comparison tests. The ability of triangular piezoelectric cantilever beam (PCB) was tested through design and physical manufacture. Finally, the self-powered performance of the sensor was tested by connecting the sensor and the triangular PCB through a circuit, which verifies the feasibility of using the PCB to collect bridge vibration energy and convert it into electrical energy to supply power for sensor, and also explore the green energy collection and application.

scholarly journals Performance-Enhanced Triboelectric Nanogenerator Based on the Double-Layered Electrode Effect

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2854
Author(s):  
Seungju Jo ◽  
Inkyum Kim ◽  
Nagabandi Jayababu ◽  
Daewon Kim
Keyword(s):  
High Sensitivity ◽  
Electrical Energy ◽  
Force Sensor ◽  
Metal Deposition ◽  
Electrical Performance ◽  
Triboelectric Nanogenerator ◽  
Optimal Point ◽  
Oxidation Layer ◽  
Self Powered ◽  
Electrical Output

Recently, studies on enhancing the performance of triboelectric nanogenerators (TENGs) by forming nanostructures at the contacting interface have been actively reported. In this study, a double-layered bottom electrode TENG (DE-TENG) was successfully fabricated using a metal deposition layer after the water-assisted oxidation (WAO) process. As previously reported, the WAO process for the enhancement of electrical performance increases the effective contact area with an inherent surface oxidation layer (Al2O3). As a new approach for modifying deficiencies in the WAO process, a metal deposition onto the oxidation layer was successfully developed with increased device output performance by restoring the surface conductivity. The proposed metal–dielectric–metal sandwich-structured DE-TENG generated approximately twice the electrical output generated by the WAO process alone (WAO-TENG). This dramatically improved electrical output was proven by a theoretical demonstration based on a double capacitance structure. In addition, the double capacitance structure was confirmed with the aid of a field emission scanning electron microscope. The optimal point at which the DE-TENG generates the highest electrical outputs was observed at a specific Cu layer sputtering time. The exceptional durability of the DE-TENG was proved by the 1 h endurance test under various relative humidity conditions. The potential of a self-powered force sensor using this DE-TENG is demonstrated, having a comparably high sensitivity of 0.82 V/N. Considering its structure, increased electrical energy, easy fabrication, and its durability, this novel DE-TENG is a promising candidate for the self-powered energy harvesting technology in our near future.

scholarly journals Validation and Performance Comparison of Three SARS-CoV-2 Antibody Assays

2020 ◽  
Author(s):  
Kimberly J Paiva ◽  
Ricky D Grisson ◽  
Philip A Chan ◽  
John R. Lonks ◽  
Ewa King ◽  
...  
Keyword(s):  
Symptom Onset ◽  
High Sensitivity ◽  
Antibody Test ◽  
Scientific Basis ◽  
Performance Comparison ◽  
Detection Rates ◽  
Cross Reactions ◽  
Antibody Assays ◽  
Lateral Flow Assays ◽  
And Performance

AbstractSerology testing of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is increasingly being used during the current pandemic of Coronavirus Disease 2019 (COVID-19). The clinical and epidemiologic utilities of antibody-based SARS-CoV-2 testing are under debate. Characterizing these assays helps to understand the disease and provides scientific basis for deciding how to best use these assays. The study assessed one chemiluminescent assay (Abbott COVID-2 IgG) and two lateral flow assays (STANDARD Q [SQ] IgM/IgG Duo and Wondfo Total Antibody Test). Validation included 113 blood samples from 71 PCR-confirmed COVID-19 patients and 1182 samples from negative controls with potential interferences/cross-reactions, including 1063 pre-pandemic samples. IgM antibodies against SARS-CoV-2 were detected as early as post-symptom onset days 3-4. IgG antibodies were first detected post-onset days 5-6 by SQ assays. The detection rates increased gradually, and SQ IgG, Abbott IgG and Wondfo Total detected antibodies from all the PCR-confirmed patients 14 days after symptom onset. Overall agreements between SQ IgM/IgG and Wondfo Total was 88.5% and between SQ IgG and Abbott IgG was 94.6% (Kappa = 0.75, 0.89). No cross-reaction with other endemic coronavirus infections were identified. Viral hepatitis and autoimmune samples were the main cross-reactions observed. However, the interferences/cross-reactions were low. The specificities were 100% for SQ IgG and Wondfo Total and 99.62% for Abbott IgG and 98.87% for SQ IgM. These findings demonstrate high sensitivity and specificity of appropriately validated antibody-based SARS-CoV-2 assays with implications for clinical use and epidemiological seroprevalence studies.

Piezoelectric Energy Harvesting Methodologies using Ambient Mechanical Vibration: Design perspective and challenges

2020 ◽  
Vol 10 ◽  
Author(s):  
Prateek Asthana ◽  
Gargi Khanna
Keyword(s):  
Energy Harvesting ◽  
Mechanical Vibration ◽  
Electrical Energy ◽  
Research Area ◽  
Future Research ◽  
Piezoelectric Energy Harvesting ◽  
Micro Scale ◽  
Piezoelectric Energy ◽  
Self Powered ◽  
And Performance

Background and Objective: Piezoelectric energy harvesting is an emergent research area for unobtrusive power supply for fully autonomous micro-scale devices. Method: The method of energy harvesting is to utilize waste ambient mechanical vibrations to generate electrical energy through piezoelectric effect. Results and Conclusion: The present work highlights the major advancement made in the field of micro-electromechanical systems based piezoelectric energy harvester to extract ambient vibrations and convert them into usable electric power. Present study explores energy harvesting approaches for portable electronics and self-powered wireless network nodes. The performance matrices like device physics, volume, operating frequencies, design and materials have been thoroughly analyzed in this work. Conventional cantilever fabrication steps have also been discussed. Finally, guidelines for future research and performance enhancements in the field of piezoelectric energy harvesting (PEH) at micro scale have been discussed.

Segment-Type Energy Harvester Powering Wireless Sensor for Building Automation

2009 ◽  
Author(s):  
Soobum Lee ◽  
Byeng D. Youn ◽  
Byungchang Jung
Keyword(s):  
Piezoelectric Material ◽  
Energy Harvester ◽  
Electrical Energy ◽  
Ambient Vibration ◽  
Wireless Sensor ◽  
Vibration Energy ◽  
Energy Sources ◽  
Building Automation ◽  
Piezoelectric Energy ◽  
Self Powered

This paper presents an innovative design platform of piezoelectric energy harvester (EH), named segment-type EH, and its application to a wireless sensor. Energy harvesting technology is motivated to minimize battery replacement cost for wireless sensors, which aims at developing self-powered sensors by utilizing ambient energy sources. Vibration energy is one of widely available ambient energy sources which can be converted into electrical energy using a piezoelectric material. The current state-of-the-art in piezoelectric EH technology mainly utilizes a single natural frequency which is less effective when utilizing a random ambient vibration with multimodal frequencies. This research thus proposes the segment-type harvester to generate electric power efficiently which utilizes multiple modes by separating the piezoelectric material. In order to reflect the random nature of ambient vibration energy, a stochastic design optimization is solved to determine the optimal configuration in terms of energy efficiency and durability. A prototype is manufactured and mounted on a heating, ventilation, air conditioning (HVAC) system to operate a temperature wireless sensor. It shows its excellent performance to generate sufficient power for a real time temperature monitoring for building automation.

VIBRATION-BASED ENERGY HARVESTER FOR SUSTAINABLE STRUCTURAL HEALTH MONITORING SYSTEM: A CASE STUDY ON A PRESTRESSED CONCRETE GIRDER

2020 ◽  
Vol 1 (1) ◽  
pp. 16-19
Author(s):  
Tuan Minh Ha ◽  
Saiji Fukada ◽  
Toshiyuki Ueno ◽  
Duc-Duy Ho
Keyword(s):  
Prestressed Concrete ◽  
Energy Harvester ◽  
Low Cost ◽  
High Sensitivity ◽  
Electrical Energy ◽  
Open Circuit ◽  
High Durability ◽  
Parametric Studies ◽  
Self Powered ◽  
Concrete Girder

Energy harvesting technology generating electrical energy from structural responses has been in the spotlight recently because of the development of self-powered autonomous wireless sensor systems. This study proposed and tested a high-sensitivity, high-durability, low-cost vibration power-generating device using a magnetostrictive element (Fe-Ga alloy) on a real-scale prestressed concrete girder to investigate its practical performance. The device comprises a unimorph layer having a magnetostrictive element attached to a U-shaped frame with a permanent magnet for magnetic bias wound about by a coil. An evaluation of a prototype device using a Fe-Ga element of 4 × 0.5 × 16 mm was performed. With a weight of 1221 g attached, an open-circuit voltage of ~1 V at an oscillation of 9.058 Hz and 3.8 m/s2 was generated by free damped vibrations applied via a person jumping vertically from a chair to the girder. In addition, parametric studies were carried out by changing impact locations, weights, and device locations in order to examine their possible effects on the performance of the proposed energy harvester.

Design and Performance Comparison of Planar and Linear Antenna Array Using ADS

2014 ◽  
Vol 3 (2) ◽  
pp. 22-26
Author(s):  
V. S. Prabhu ◽  
◽  
V. P. Surya Surendran ◽  
V. G. Veena ◽  
◽  
...  
Keyword(s):  
Antenna Array ◽  
Performance Comparison ◽  
Linear Antenna ◽  
Linear Antenna Array ◽  
And Performance

SIMULATION AND PERFORMANCE COMPARISON OF VARIABLE SPEED MULTI-PHASE PMSM MACHINES

2018 ◽  
Vol 9 (1) ◽  
pp. 7
Author(s):  
MOIN SIDDIQUI KHADIM ◽  
FATMA AMREEN ◽  
KHURSHEED SIDDIQUI MOHD ◽  
◽  
◽  
...  
Keyword(s):  
Performance Comparison ◽  
Variable Speed ◽  
And Performance ◽  
Multi Phase

Enhancements of Non-contact Measurements of Electrical Waveforms on the Proximity of a Signal Surface Using Groups of Pulses

2002 ◽  
Author(s):  
Fenglei Du ◽  
Greg Bridges ◽  
D.J. Thomson ◽  
Rama R. Goruganthu ◽  
Shawn McBride ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Integrated Circuit ◽  
Signal To Noise Ratio ◽  
Electrostatic Force ◽  
Single Pulse ◽  
Electric Signal ◽  
Measurement Instruments ◽  
Cycle Times ◽  
Force Microscopy ◽  
And Performance

Abstract With the ever-increasing density and performance of integrated circuits, non-invasive, accurate, and high spatial and temporal resolution electric signal measurement instruments hold the key to performing successful diagnostics and failure analysis. Sampled electrostatic force microscopy (EFM) has the potential for such applications. It provides a noninvasive approach to measuring high frequency internal integrated circuit signals. Previous EFMs operate using a repetitive single-pulse sampling approach and are inherently subject to the signal-to-noise ratio (SNR) problems when test pattern duty cycle times become large. In this paper we present an innovative technique that uses groups of pulses to improve the SNR of sampled EFM systems. The approach can easily provide more than an order-ofmagnitude improvement to the SNR. The details of the approach are presented.

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