Development of a Piezoelectric Weigh-in-motion System for Battery-less Wireless Operation
Author: Sean Michael Pruden
Publisher:
Published: 2011
Total Pages: 103
ISBN-13:
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Development in Piezoelectric Weigh-in-motion Systems
Author:
Publisher:
Published: 1987
Total Pages: 23
ISBN-13:
DOWNLOAD EBOOKWith the current trend towards deregulation in the north american trucking environment, there will be an increasing demand to monitor the ongoing changes in vehicle weights and dimensions. there is now considerable emphasis on producing an accurate weigh in motion (wim) scale that will be relatively inexpensive and yet able to withstand the harsh extremes of the canadian climate. developments in piezoelectric weigh in motion (pwim) systems show a good deal of promise in this regard. this paper reviews the technological developments of pwim, explores parameters affecting the accuracy and longevity of these systems, and shows how pwim can be used: 1) to enhance the data collection efforts of agencies concerned with road safety and pavement deterioration, and 2) to provide for the data collection needs of special programs such as the strategic highway research program (shrp) in the united states and c-shrp in canada. for the covering abstract of the conference see irrd 807058.
Piezoelectric Energy Harvesting
Author: Alper Erturk
Publisher: John Wiley & Sons
Published: 2011-04-04
Total Pages: 377
ISBN-13: 1119991358
DOWNLOAD EBOOKThe transformation of vibrations into electric energy through the use of piezoelectric devices is an exciting and rapidly developing area of research with a widening range of applications constantly materialising. With Piezoelectric Energy Harvesting, world-leading researchers provide a timely and comprehensive coverage of the electromechanical modelling and applications of piezoelectric energy harvesters. They present principal modelling approaches, synthesizing fundamental material related to mechanical, aerospace, civil, electrical and materials engineering disciplines for vibration-based energy harvesting using piezoelectric transduction. Piezoelectric Energy Harvesting provides the first comprehensive treatment of distributed-parameter electromechanical modelling for piezoelectric energy harvesting with extensive case studies including experimental validations, and is the first book to address modelling of various forms of excitation in piezoelectric energy harvesting, ranging from airflow excitation to moving loads, thus ensuring its relevance to engineers in fields as disparate as aerospace engineering and civil engineering. Coverage includes: Analytical and approximate analytical distributed-parameter electromechanical models with illustrative theoretical case studies as well as extensive experimental validations Several problems of piezoelectric energy harvesting ranging from simple harmonic excitation to random vibrations Details of introducing and modelling piezoelectric coupling for various problems Modelling and exploiting nonlinear dynamics for performance enhancement, supported with experimental verifications Applications ranging from moving load excitation of slender bridges to airflow excitation of aeroelastic sections A review of standard nonlinear energy harvesting circuits with modelling aspects.
Development of a Low-cost Truck Weighing System. Final Report
Author: Wiley D. Cunagin
Publisher:
Published: 1988
Total Pages: 142
ISBN-13:
DOWNLOAD EBOOKEvaluation of Piezoelectric Weigh-in-motion System
Author:
Publisher:
Published: 1994
Total Pages: 5
ISBN-13:
DOWNLOAD EBOOKThe analysis presented deals with the accuracy of a piezoelectric weigh-in-motion system installed on Interstate 19 in the state of Oregon. Axle weights for 5-axle tractor semi-trailer trucks were measured by the piezoelectric weigh-in-motion system and then compared with the static weights. An analysis of variance and Dunnett's test were conducted in order to determine if there existed a significant difference between data. The analysis showed no significant difference for steering axle and tandem axle weights. However, the analysis did indicate that a significant difference existed for trailing tandem.
Laboratory and Field Evaluation of Piezoelectric Weigh-in-Motion Sensors
Author: AT. Papagiannakis
Publisher:
Published: 2001
Total Pages: 9
ISBN-13:
DOWNLOAD EBOOKThis paper presents the results of the laboratory and field evaluation of the piezoelectric weigh-in-motion (WIM) sensors of two manufacturers, namely Vibracoax (VC) and Measurements Specialties Incorporated (MSI). The laboratory evaluation involved fatigue testing of two sensor types for each manufacturer, one factory-encapsulated and the other bare. The fatigue testing involved three contact stresses as well as dry and wet conditions. Significant sensor fatigue was experienced only under wet conditions. The field evaluation of these sensors was carried in both asphalt concrete (AC) and Portland concrete (PC) installations. The facilities at Nevada's WesTrack and at a CalTrans Heavy Vehicle Simulator site were used, respectively. All sensors exhibited high raw signal precision at any given time. Raw signal amplitude seemed to depend on temperature for the sensors installed in the AC pavement. For increasing pavement temperature, the raw signal amplitude of the VC sensors decreased, while that of the MSI sensors increased. The signal-to-noise ratio of the raw signal increased with increasing temperature for the sensors installed in the AC pavement. WIM load measurement precision and sensitivity to temperature varied between sensors. The poor load precision of some of the sensors was attributed to the load calculation algorithm in the WIM data acquisition system, rather than to sensor malfunctioning. During the period of the field tests, no consistent changes in WIM axle load measurements were observed that could be attributed to piezoelectric sensor fatigue.
Implementation and Evaluation of a Low-cost Weigh-in-motion System
Author: Taek Mu Kwon
Publisher:
Published: 2016
Total Pages: 37
ISBN-13:
DOWNLOAD EBOOKBuilding a WIM system around polymer piezoelectric film sensors, called BL sensors, costs only a fraction of the traditional WIM system built around crystalline-quartz piezoelectric sensors called Lineas sensors. However, BL sensors are highly sensitive to temperature, which limits the accuracy of weight measurements. The objective of this research was to investigate the performance of BL sensors head-to-head with Lineas sensors by installing a BL WIM system and collecting data from the same highway. After the test site installation, pavement temperatures were recoded as part of each vehicle record from both Lineas and BL sensor-based WIM stations. The analysis of data collected over 10 months showed that temperature dependency of BL sensors can be removed in terms of average but not variance. More specifically, the average of axle weights after temperature-based calibration was about the same for both BL and Lineas sensors, but the variance was much higher for BL sensors. In conclusion, if BL sensors are used, pavement temperatures must be recorded as part of vehicle records. Then, the weights calibrated based temperature would be as accurate as Lineas sensors in terms of the average but not variance.
Energy Scavenging for Wireless Sensor Networks
Author: Shad Roundy
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 219
ISBN-13: 1461504856
DOWNLOAD EBOOKThe vast reduction in size and power consumption of CMOS circuitry has led to a large research effort based around the vision of wireless sensor networks. The proposed networks will be comprised of thousands of small wireless nodes that operate in a multi-hop fashion, replacing long transmission distances with many low power, low cost wireless devices. The result will be the creation of an intelligent environment responding to its inhabitants and ambient conditions. Wireless devices currently being designed and built for use in such environments typically run on batteries. However, as the networks increase in number and the devices decrease in size, the replacement of depleted batteries will not be practical. The cost of replacing batteries in a few devices that make up a small network about once per year is modest. However, the cost of replacing thousands of devices in a single building annually, some of which are in areas difficult to access, is simply not practical. Another approach would be to use a battery that is large enough to last the entire lifetime of the wireless sensor device. However, a battery large enough to last the lifetime of the device would dominate the overall system size and cost, and thus is not very attractive. Alternative methods of powering the devices that will make up the wireless networks are desperately needed.
Prognostics and Health Management of Electronics
Author: Michael G. Pecht
Publisher: John Wiley & Sons
Published: 2018-08-21
Total Pages: 973
ISBN-13: 1119515351
DOWNLOAD EBOOKAn indispensable guide for engineers and data scientists in design, testing, operation, manufacturing, and maintenance A road map to the current challenges and available opportunities for the research and development of Prognostics and Health Management (PHM), this important work covers all areas of electronics and explains how to: assess methods for damage estimation of components and systems due to field loading conditions assess the cost and benefits of prognostic implementations develop novel methods for in situ monitoring of products and systems in actual life-cycle conditions enable condition-based (predictive) maintenance increase system availability through an extension of maintenance cycles and/or timely repair actions; obtain knowledge of load history for future design, qualification, and root cause analysis reduce the occurrence of no fault found (NFF) subtract life-cycle costs of equipment from reduction in inspection costs, downtime, and inventory Prognostics and Health Management of Electronics also explains how to understand statistical techniques and machine learning methods used for diagnostics and prognostics. Using this valuable resource, electrical engineers, data scientists, and design engineers will be able to fully grasp the synergy between IoT, machine learning, and risk assessment.
Biologically-Inspired Energy Harvesting through Wireless Sensor Technologies
Author: Ponnusamy, Vasaki
Publisher: IGI Global
Published: 2016-04-05
Total Pages: 343
ISBN-13: 1466697938
DOWNLOAD EBOOKThe need for sustainable sources of energy has become more prevalent in an effort to conserve natural resources, as well as optimize the performance of wireless networks in daily life. Renewable sources of energy also help to cut costs while still providing a reliable power sources. Biologically-Inspired Energy Harvesting through Wireless Sensor Technologies highlights emerging research in the areas of sustainable energy management and transmission technologies. Featuring technological advancements in green technology, energy harvesting, sustainability, networking, and autonomic computing, as well as bio-inspired algorithms and solutions utilized in energy management, this publication is an essential reference source for researchers, academicians, and students interested in renewable or sustained energy in wireless networks.
