Evaluation Of Measurement Specialties Inc Piezoelectric Weigh In Motion Sensors
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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
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 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.
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.
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.
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.
Piezoelectric Sensors For Weigh In Motion Systems
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Author : J. Iaquinta
language : en
Publisher:
Release Date : 2004
Piezoelectric Sensors For Weigh In Motion Systems written by J. Iaquinta and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Biosensors categories.
Experimental campaigns conducted on the theme of weigh-in-motion exhibited an unexpected scattering of the weight measurements. In spite of several attempts, no argument was found to satisfactorily explain the dispersal, in particular for the sites implementing piezoelectric sensors. After tackling this problem numerically in a previous study, the present investigation aims at understanding experimentally the behavior of such systems within the material in which they are embedded in the road. A field campaign utilizing an instrumented truck confirmed a loss of sensitivity at the ends of the sensor. This result was also corroborated by laboratory testing on a servohydraulic jack. It is shown that the location of a load over the sensor affects its response, and that only a small part of the traffic lane is saved from edge effects. The major mission of this work is to make users of weigh-in-motion systems based upon piezoelectric sensors aware of this phenomenon so that they can take actions to recognize and compensate for the potential measurement errors associated with using this type of sensor.
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.
Investigation Of Environmental Impacts On Piezoelectric Weigh In Motion Sensing System
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Author : Shahram Hashemi Vaziri
language : en
Publisher:
Release Date : 2011
Investigation Of Environmental Impacts On Piezoelectric Weigh In Motion Sensing System written by Shahram Hashemi Vaziri and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Transportation by trucks plays a major role in North America's economy. The growth of this industry will increase the loads on existing roads and highways and raises the possibility of overloaded vehicles, which causes significant damage to the pavement and consequently will reduce the lifespan of the roads. Weigh-in-motion (WIM) systems technology helps to address the challenge of overloaded vehicles. This technology provides traffic monitoring, collects data for pavement research and design, and improves the capacity of static weigh station operations. However, there is still a lack of knowledge about the behaviour of WIM sensors installed in different environments, which affects reliable and precise data gathering. More knowledge is required on proper installation procedures, pavement design for WIM systems, choice of sensor type for location, and calibration processes. This research is intended to explore the behaviour of WIM piezoelectric sensors under different loads and environmental conditions. Specifically, the effects of air and pavement temperature, and weight and speed of trucks are examined with respect to the estimation accuracy of WIM sensors. To accomplish this, three WIM systems composed of different piezoelectric transducers were installed at the CPATT test site at the Waste Management facility of the Region of Waterloo in 2007, and two WIM systems were installed between exits 238 and 250 on Highway 401 eastbound near Woodstock, Ontario. It was concluded that the output of the polymer piezoelectric sensor is influenced by temperature and weight factors but not by normally observed vehicle speed differences. While temperature can be compensated for, not enough information has been gathered yet does the same for weight factor. It should be noted that very low speeds (e.g.