Evaluation Of Thermocoax Piezoelectric Weigh In Motion Sensors
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Evaluation Of Thermocoax Piezoelectric Weigh In Motion Sensors
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Author : Highway Innovative Technology Evaluation Center (U.S.)
language : en
Publisher: ASCE Publications
Release Date : 2001-01-01
Evaluation Of Thermocoax Piezoelectric Weigh In Motion Sensors written by Highway Innovative Technology Evaluation Center (U.S.) and has been published by ASCE Publications this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-01-01 with Technology & Engineering categories.
Prepared by the Highway Innovative Technology Evaluation Center (HITEC), a CERF Innovation Center. This report describes a program of installation, testing, and evaluation designed to determine the capabilities and limitations of Thermocoax's weigh-in-motion sensor.
Evaluation Of Thermocoax Piezoelectric Weigh In Motion Sensors
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Author :
language : en
Publisher: Amer Society of Civil Engineers
Release Date : 2001-01-01
Evaluation Of Thermocoax Piezoelectric Weigh In Motion Sensors written by and has been published by Amer Society of Civil Engineers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-01-01 with Technology & Engineering categories.
This report, Evaluation of Thermocoax Piezoelectric Weigh-in-Motion Senosrs, describes a program of installation, testing, and evaluation designed to determine the capabilities and limitations of Thermocoax"s weigh-in-motion sensor.
Laboratory And Field Evaluation Of Piezoelectric Weigh In Motion Sensors
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Author : AT. Papagiannakis
language : en
Publisher:
Release Date : 2001
Laboratory And Field Evaluation Of Piezoelectric Weigh In Motion Sensors written by AT. Papagiannakis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Automotive sensors categories.
This 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.
Evaluation Of The Inter Lok Retaining Wall System
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Author : Highway Innovative Technology Evaluation Center (U.S.)
language : en
Publisher: ASCE Publications
Release Date : 2002-01-01
Evaluation Of The Inter Lok Retaining Wall System written by Highway Innovative Technology Evaluation Center (U.S.) and has been published by ASCE Publications this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-01-01 with Technology & Engineering categories.
Prepared by the Highway Innovative Technology Evaluation Center (HITEC), a CERF/IIEC Innovation Center. This report describes a HITEC evaluation designed to determine the basic capabilities and limitations of the INTER-LOK System for use as a technically viable, precast mechanically stabilized earth retaining wall system. The evaluation was conducted based on design, construction, performance, and quality assurance information outlined in the HITEC Protocol. The INTER-LOK System features a cross-shaped, segmental precast concrete facing panel connected to metallic rebar and anchor plate type of soil reinforcement attached to the facing panels by a keyplate that interlocks with the facing panels.
Evaluation Of The Tricon Retained Soil Wall System
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Author : Highway Innovative Technology Evaluation Center (U.S.)
language : en
Publisher: ASCE Publications
Release Date : 2002-01-01
Evaluation Of The Tricon Retained Soil Wall System written by Highway Innovative Technology Evaluation Center (U.S.) and has been published by ASCE Publications this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-01-01 with Technology & Engineering categories.
Prepared by the Highway Innovative Technology Evaluation Center, a CERF/IIEC Innovation Center. This report describes a HITEC evaluation designed to determine the basic capabilities and limitations of the Tricon System for use as a technically viable, precast, mechanically stabilized earth-retaining wall system. The evaluation considered material, design, construction, performance, and quality assurance information outlined in the HITEC Protocol.
Environmental Technology Verification Report For The Plasma Enhanced Melter
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Author :
language : en
Publisher: ASCE Publications
Release Date : 2003-01-01
Environmental Technology Verification Report For The Plasma Enhanced Melter written by and has been published by ASCE Publications this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-01-01 with Technology & Engineering categories.
Prepared by the Environmental Technology Evaluation Center (EvTEC), a service center of CERF/IIEC. This Technology Verification report describes the nature and scope of the environmental evaluation of the performance of the Plasma Enhanced Melter? (PEM?) system for waste treatment. The evaluation was conducted through a cooperative program established in 1998 between the Washington State Department of Ecology, Integrated Environmental Technology Inc., Allied Technology Group, and the Civil Engineering Research Foundation. The goal of this report is to provide potential users and purchasers of the PEM? system with information they need to make more informed decisions regarding the performance of PEM? as an equivalent or alternative to incineration for treating hazardous waste.
Evaluation Of Measurement Specialties Inc Piezoelectric Weigh In Motion Sensors
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Author :
language : en
Publisher: Amer Society of Civil Engineers
Release Date : 2001-01-01
Evaluation Of Measurement Specialties Inc Piezoelectric Weigh In Motion Sensors written by and has been published by Amer Society of Civil Engineers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-01-01 with Technology & Engineering categories.
Weigh-in-motion sensors are embedded in highways to measure the loads imparted on roadways. This report presents the results of testing the performance and durability of two weigh-in-motion sensors manufactured by Measurement Specialties, Inc. The tests were performed in a laboratory, in Portland ce
Development And Evaluation Of Piezoelectric Ceramic Polymer Composite Sensors For Weigh In Motion Applications
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Author : Patrick J. Szary
language : en
Publisher:
Release Date : 2009
Development And Evaluation Of Piezoelectric Ceramic Polymer Composite Sensors For Weigh In Motion Applications written by Patrick J. Szary and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Motor vehicle scales categories.
This research explored the development and implementation of a novel, durable, higher voltage, and lower temperature dependant weigh-in-motion (WIM) sensor. These better sensors will require fewer lane closings and replacements than existing sensors. They will also aid the Departments of Transportation to better identify those vehicles that do not comply with the current weight restrictions. The primary focus of the research was to create a full scale WIM sensor that is less temperature dependent and more durable than traditional WIM sensors. Traditionally, the data collected from the sensor may be utilized in two ways. The first is by using static vehicle effects on the sensor, which corresponds to the weight of the vehicle, this data can be used for enforcement of the vehicle legal weight limits. The second is by using the dynamic loading of the sensor, which relates to the actual loading that the roadway is experiencing, this data will be useful to engineers who must design the roadway as well as plan for repair schedules. In addition, instead of just using WIM data to screen commercial vehicles or for pavement design; there is a new recognition that good data can be useful for bridge structural analysis, safety analysis, traffic control and operations, freight management and operations, facility planning and programming, and standards and policy enforcement as per the recent report "Effective Use of Weigh-in-Motion Data, the Netherlands Case Study" FHWA October 2007. In lieu of this development, the need for better sensors to provide good data is more important today than ever before. The ceramic-polymer composite sensors performed extremely well in all laboratory testing. However, under full-scale field implementation, a rather aggressive goal, the sensors and sensor assemblies experienced some level of failure. During the forensic evaluation it was found that that the pavement section for the full-scale testing was already quite old and significantly fatigued. Therefore, the test site was prone to fail almost immediately after installation. Discounting the results of the full-scale field testing, the PZT-5H ceramic-polymer composite sensor performed with less variability due to temperature and produced higher voltage output than standard PVDF materials.
Evaluation Of Weigh In Motion Systems
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Author : Benjamin H. Cottrell
language : en
Publisher:
Release Date : 1992
Evaluation Of Weigh In Motion Systems written by Benjamin H. Cottrell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Piezoelectric devices categories.
The objective of this research was to evaluate low cost weigh-in-motion systems. The three systems evaluated were (1) a capacitance weigh mat system, (2) a bridge weighing system, and (3) a piezoelectric cable sensor system. All three systems have a two-lane capability. An evaluation was made of (1) the quality of the data, (2) the performance of the equipment, (3) the applications of the equipment and its ease ofuse, and (4) the format of the data and its usefulness. Although objective data were used when possible, the majority of the evaluation is subjective. The quality of the data from each of the three systems is about the same. The piezoelectric cable system provides slightly lower quality data than the other two systems. The equipment of the capacitance weigh mat performed well; that of the bridge system was adequate; and there was concern about the durability of the piezoelectric cable system. Because of the tradeoffs between the capacitance weigh mat system and the bridge system, it is difficult to rank them. The piezoelectric cable system's sensors are permanently installed; therefore, it is not as portable as the other two systems. With regard to the format of the data and its usefulness (which are dependent mostly on the software and not the sensors), the capacitance weigh mat system is flexible and provides individual truck records in two formats, the bridge system provides the most comprehensive tables, and the piezoelectric cable system is limited and depends on other software to generate additional tables. Suggestions are made about how to use the systems and how to improve their performance.
Evaluation Of Piezoelectric Weigh In Motion System
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Author :
language : en
Publisher:
Release Date : 1994
Evaluation Of Piezoelectric Weigh In Motion System written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
The 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.