Advanced Weigh In Motion System For Weighing Vehicles At High Speed
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Advanced Weigh In Motion System For Weighing Vehicles At High Speed
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Author :
language : en
Publisher:
Release Date : 1998
Advanced Weigh In Motion System For Weighing Vehicles At High Speed written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
A state-of-the-art, Advanced Weigh-In-Motion (WIM) system has been designed, installed, and tested on the west bound side of Interstate I-75/I-40 near the Knox County Weigh Station. The project is a Cooperative Research and Development Agreement (CRADA) between Oak Ridge National Laboratory (ORNL) and International Road Dynamics, Inc. (IRD) sponsored by the Office of Uranium Programs, Facility and Technology Management Division of the Department of Energy under CRADA No. ORNL95-0364. ORNL, IRD, the Federal Highway Administration, the Tennessee Department of Safety and the Tennessee Department of Transportation have developed a National High Speed WIM Test Facility for test and evaluation of high-speed WIM systems. The WIM system under evaluation includes a Single Load Cell WIM scale system supplied and installed by IRD. ORNL developed a stand-alone, custom data acquisition system, which acquires the raw signals from IRD's in-ground single load cell transducers. Under a separate contract with the Federal Highway Administration, ORNL designed and constructed a laboratory scale house for data collection, analysis and algorithm development. An initial advanced weight-determining algorithm has been developed. The new advanced WIM system provides improved accuracy and can reduce overall system variability by up to 30% over the existing high accuracy commercial WIM system.
High Speed Weigh In Motion System Calibration Practices
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Author : A. T. Papagiannakis
language : en
Publisher: Transportation Research Board
Release Date : 2008
High Speed Weigh In Motion System Calibration Practices written by A. T. Papagiannakis and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Motor vehicle scales categories.
Calibration Of Weigh In Motion Systems
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Author : J. M. Zuieback
language : en
Publisher:
Release Date : 1988
Calibration Of Weigh In Motion Systems written by J. M. Zuieback and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Motor vehicle scales categories.
Review
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Author : Oak Ridge National Laboratory
language : en
Publisher:
Release Date : 1994
Review written by Oak Ridge National Laboratory and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Nuclear energy categories.
Pilot Study Of A Portable High Speed Weigh In Motion System
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Author : Jeffrey J. Lew
language : en
Publisher:
Release Date : 1988
Pilot Study Of A Portable High Speed Weigh In Motion System written by Jeffrey J. Lew and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Electronic weighing systems categories.
Pilot Study Of A Portable High Speed Weigh In Motion System Final Report
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Author : Jeffrey J. Lew
language : en
Publisher:
Release Date : 1988
Pilot Study Of A Portable High Speed Weigh In Motion System Final Report written by Jeffrey J. Lew and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Motor vehicle scales categories.
Development Of A Weigh In Motion System Using Acoustic Emission Sensors
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Author : Jeanne M. Bowie
language : en
Publisher:
Release Date : 2011
Development Of A Weigh In Motion System Using Acoustic Emission Sensors written by Jeanne M. Bowie and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Acoustic emission categories.
This dissertation proposes a system for weighing commercial vehicles in motion using acoustic emission sensors attached to a metal bar placed across the roadway. The signal from the sensors is analyzed by a computer and the vehicle weight is determined by a statistical model which correlates the acoustic emission parameters to the vehicle weight. Such a system would be portable and low-cost, allowing for the measurement of vehicle weights in much the same way commercial tube and radar counters routinely collect vehicle speed and count. The system could be used to collect vehicle speed and count data as well as weight information. Acoustic emissions are naturally occurring elastic waves produced by the rapid release of energy within a material. They are caused by deformation or fracturing of a solid due to thermal or mechanical stress. Acoustic emission sensors have been developed to detect these waves and computer software and hardware have been developed to analyze and provide information about the waveforms. Acoustic emission testing is a common form of nondestructive testing and is used for pressure vessel testing, leak detection, machinery monitoring, structural integrity monitoring, and weld monitoring, among other things (Miller, 1987). For this dissertation, acoustic emission parameters were correlated to the load placed on the metal test bar to determine the feasibility of using a metal test bar to measure the weight of a vehicle in motion. Several experiments were done. First, the concept was tested in a laboratory setting using an experimental apparatus. A concrete cylinder was mounted on a frame and rotated using a motor. The metal test bar was applied directly to the surface of the cylinder and acoustic emission sensors were attached to each end of the bar. As the cylinder rotated, a motorcycle tire was pushed up against the cylinder using a scissor jack to simulate different loads. The acoustic emission response in the metal test strip to the motorcycle tire rolling over it was detected by the acoustic emission sensors and analyzed by the computer. Initial examinations of the data showed a correlation between the force of the tire against the cylinder and the energy and count of the acoustic emissions. Subsequent field experiments were performed at a weigh station on I-95 in Flagler County, Florida. The proposed weigh-in-motion system (the metal test bar with attached acoustic emission sensors) was installed just downstream of the existing weigh-in-motion scale at the weigh station. Commercial vehicles were weighed on the weigh station weigh-in-motion scale and acoustic emission data was collected by the experimental system. Test data was collected over several hours on two different days, one in July 2008 and the other in April 2009. Initial examination of the data did not show direct correlation between any acoustic emission parameter and vehicle weight. As a result, a more sophisticated model was developed. Dimensional analysis was used to examine possible relationships between the acoustic emission parameters and the vehicle weight. In dimensional analysis, a dimensionally correct equation is formed using measurable parameters of a system. The dimensionally correct equation can then be tested using experimental data. Dimensional analysis revealed the possible relationships between the acoustic emission parameters and the vehicle weight: w=f (gE/v2, YA, rE/D[square root of A], cE/[square root of A], c[subscript p]E/[square root of A], E3/[square root of A][multiplication dot]AbsE, aE/[square root of A]) The defintions of these variables can be found in Appendix A. Statistical models for weight using the laboratory data and using the field data were developed. Dimensional analysis variables as well as other relevant measurable parameters were used in the development of the statistical models. The model created for the April 2009 dataset was validated, with only 27 lbs average error in the weight calculation as compared with the weight measurement made with the weigh station weigh-in-motion scale. The maximum percent error for the weight calculation was 204%, with about 65% of the data falling within 30% error. Additional research will be needed to develop an acoustic emission weigh-in-motion system with adequate accuracy for a commercial product. Nevertheless, this dissertation presents a valuable contribution to the effort of developing a low-cost acoustic emission weigh-in-motion scale. Future research needs that were identified as part of this dissertation include: [bullet] Examination of the effects of pavement type (flexible or rigid), vehicle speeds greater than 50 mph, and temperature [bullet] Determination of the best acoustic emission sensor for this system [bullet] Exploration of the best method to separate the data from axles which pass over the equipment close together in time (such as tandem axles) [bullet] Exploration of the effect of repeated measures on improving the accuracy of the system.
Pilot Study Of A Portable High Speed Weigh In Motion System Executive Summary
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Author : Jeffrey J. Lew
language : en
Publisher:
Release Date : 1988
Pilot Study Of A Portable High Speed Weigh In Motion System Executive Summary written by Jeffrey J. Lew and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Electronic weighing systems categories.
Evaluation Of A Weigh In Motion Pre Selector System For Enforcement Weighing
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Author : F. K. Sommerville
language : en
Publisher:
Release Date : 1990
Evaluation Of A Weigh In Motion Pre Selector System For Enforcement Weighing written by F. K. Sommerville and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Motor vehicle scales categories.
Development Of A High Precision Weigh In Motion Axle Load Scale
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Author : Terry Bergan
language : en
Publisher: The Centre
Release Date : 1991
Development Of A High Precision Weigh In Motion Axle Load Scale written by Terry Bergan and has been published by The Centre this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Motor vehicle scales categories.
In 1987 a test was conducted of a high precision, low speed Weigh-in-Motion (WIM) system that could accurately weigh vehicle axles and be used for enforcement purposes at weight scale facilities. A complete prototype system was installed for testing and demonstration at Clavet, Saskatchewan. The system was checked against weights obtained from the static scale in use at the site over nine months. Two additional systems were installed in British Columbia and were monitored over five months, during which the system was subjected to a variety of hostile conditions. This report describes the technical development of the in-road hardware and the data acquisition electronics; the operational characteristics; prototype testing; and the B.C. sites and monitoring.