Download or read book Evaluation of Measurement Specialties Inc Piezoelectric Weigh In Motion Sensors written by and published by Amer Society of Civil Engineers. This book was released on 2001-01-01 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Laboratory and Field Evaluation of Piezoelectric Weigh in Motion Sensors written by AT. Papagiannakis and published by . This book was released on 2001 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Evaluation of Thermocoax Piezoelectric Weigh in Motion Sensors written by Highway Innovative Technology Evaluation Center (U.S.) and published by ASCE Publications. This book was released on 2001-01-01 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Evaluation of Thermocoax Piezoelectric Weigh in motion Sensors written by and published by Amer Society of Civil Engineers. This book was released on 2001-01-01 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Evaluation of the Inter Lok Retaining Wall System written by Highway Innovative Technology Evaluation Center (U.S.) and published by ASCE Publications. This book was released on 2002-01-01 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Evaluation of the Tricon Retained Soil Wall System written by Highway Innovative Technology Evaluation Center (U.S.) and published by ASCE Publications. This book was released on 2002-01-01 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Environmental Technology Verification Report for the Plasma Enhanced Melter written by and published by ASCE Publications. This book was released on 2003-01-01 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Piezoelectric Sensors for Weigh In Motion Systems written by J. Iaquinta and published by . This book was released on 2004 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Evaluation of Piezoelectric Weigh in motion System written by and published by . This book was released on 1994 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Second Interim Report on the Installation and Evaluation of Weigh in motion Utilizing Quartz piezo Sensor Technology written by Donald A. Larsen and published by . This book was released on 1999 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Speed Weigh in motion System Calibration Practices written by A. T. Papagiannakis and published by Transportation Research Board. This book was released on 2008 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weigh in motion Systems Evaluation Final Report written by James O. Burt and published by . This book was released on 1976 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Book Review Index written by and published by . This book was released on 2003 with total page 1346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every 3rd issue is a quarterly cumulation.
Download or read book Investigation of Environmental Impacts on Piezoelectric Weigh in motion Sensing System written by Shahram Hashemi Vaziri and published by . This book was released on 2011 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book American Book Publishing Record written by and published by . This book was released on 2001 with total page 2744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weigh in motion Sensor and Controller Operation and Performance Comparison written by Diwakar Gupta and published by . This book was released on 2018 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research project utilized statistical inference and comparison techniques to compare the performance of different Weigh-in-Motion (WIM) sensors. First, we analyzed test-vehicle data to perform an accuracy check of the results reported by the sensor-vendor Intercomp. The results reported by Intercomp mostly matched with our own analysis, but the data were found to be insufficient to reach any conclusions about the accuracy of the sensor under different temperature and speed conditions. Second, based on the limited data from the Intercomp and IRD sensor systems, we performed tests of self-consistency and comparisons of measurements to inform the selection of a superior system. Intercomp sensor data were found to be not self-consistent but IRD data were. Given the different measurements provided by the two sensors, without additional data, we were not able to reach a conclusion regarding the relative accuracy or the duration of consistent observations before needing recalibration. Initial comparisons indicated potential problems with the Intercomp sensor. We then suggested alternate approaches that MNDOT could use to determine whether recalibration was required. Finally, we analyzed ten-month data from the IRD WIM system and four-month data from the Kistler WIM system to evaluate relative sensor accuracy. While both systems were found to be self-consistent within the data time frame, the Kistler system generated more errors than the IRD system. Conclusions regarding relative accuracy could not be reached without additional data. We identified the sorts of measurements that would need to be monitored for recalibration and the methodology needed for estimating future recalibration time.
Download or read book Pavement Design and Materials written by A. T. Papagiannakis and published by John Wiley & Sons. This book was released on 2017-02-22 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive, state-of-the-art guide to pavement design and materials With innovations ranging from the advent of SuperpaveTM, the data generated by the Long Term Pavement Performance (LTPP) project, to the recent release of the Mechanistic-Empirical pavement design guide developed under NCHRP Study 1-37A, the field of pavement engineering is experiencing significant development. Pavement Design and Materials is a practical reference for both students and practicing engineers that explores all the aspects of pavement engineering, including materials, analysis, design, evaluation, and economic analysis. Historically, numerous techniques have been applied by a multitude of jurisdictions dealing with roadway pavements. This book focuses on the best-established, currently applicable techniques available. Pavement Design and Materials offers complete coverage of: The characterization of traffic input The characterization of pavement bases/subgrades and aggregates Asphalt binder and asphalt concrete characterization Portland cement and concrete characterization Analysis of flexible and rigid pavements Pavement evaluation Environmental effects on pavements The design of flexible and rigid pavements Pavement rehabilitation Economic analysis of alternative pavement designs The coverage is accompanied by suggestions for software for implementing various analytical techniques described in these chapters. These tools are easily accessible through the book’s companion Web site, which is constantly updated to ensure that the reader finds the most up-to-date software available.
