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 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 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 Evaluation of Weigh in motion Systems written by Benjamin H. Cottrell and published by . This book was released on 1992 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

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 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 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.

Download or read book Post proceedings of the First European Conference on Weigh in Motion of Road Vehicle 8 10 March 1995 ETH Z rich written by Post-proceedings of the European Conference on weigh-in-motion of road vehicles and published by . This book was released on 1995 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Implementation and Evaluation of a Low cost Weigh in motion System written by Taek Mu Kwon and published by . This book was released on 2016 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building 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.

Download or read book Development and Evaluation of Piezoelectric Ceramic polymer Composite Sensors for Weigh in motion Applications written by Patrick J. Szary and published by . This book was released on 2009 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Canadian Journal of Civil Engineering written by and published by . This book was released on 1994 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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.