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Showing 1 to 16 of 16 for “"field instrumentation"”.
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Field instrumentation for vocalizing avian survey
We present automated instruments to facilitate the monitoring of vocalizing species in their environment with minimal disruption. These devices offer recording and acoustic localization of bird calls and relay data via the GSM cellular network to remote servers. Further, the system may be augmented …
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Optical Field Instrumentation for Characterizing Particle Sampling Sensors
Particle ingestion in gas turbine applications can be detrimental to performance and pose significant safety concerns. Areas of high sand concentration are hazardous to aircraft, requiring precautions like routine inspections and maintenance. The engine failure modes are dependent on particle …
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Development and application of a field instrumentation system for the investigation of surf zone hydrodynamics
The development and application of an autonomous field instrumentation system consisting of four current meters and four wave gauges, along with a field monitor and digital recorder, is documented. The flow sensors are electromagnetic current meters, which employ the principle of electromagnetic …
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Settlement Analyses of Grade Supported Tanks Constructed with the Use of Prefabricated Wick Drains and an Earth Preload
… tanks constructed under an extensive preload and instrumentation program. Settlement estimation methods were performed and compared to field instrumentation data taken at the project sites. Three project sites were selected for this study. The geotechnical investigations were performed by Eustis …
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Low cost monitoring system to diagnose problematic rail bed : case study of Mud Pumping Site
… problematic rail beds (subgrade). The instrumentations are installed at a busy high-speed Northeast Corridor (NEC) railway site that is experiencing recurring mud pumping problems and requires frequent (bi-monthly) track maintenance. The field instrumentation program addresses some of …
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Influência de escavações nos recalques em edificações vizinhas
… structures. Firstly the data obtained through field instrumentation and direct observation of the construction of several sections of Line 1 of the Rio de Janeiro subway are presented. A study of settlement follows, where its main causes are discussed, as well as the effects of the methodology …
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Evolução de células de pressão total e experiência da COPPE
… have developed a few projects requiring field instrumentation. In two of these jobs, two types of earth pressure cells were installed in the excavations for the subway of Rio de Janeiro. The measurements are described. Also shown the calibration of one of the cell types. Finally, as a …
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Track model for predicting dynamic responses of railroad bridge approaches
… scope of the research encompassed statistical field data analysis, analytical model derivation, algorithmic developments, as well as experimental validation for the track model to provide improved design and maintenance practices. The objective was to better understand governing mechanisms of …
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Autonomous triggering system and measurement protocols for smart bridge testing
<p>"This work describes the development and field trials of an autonomous triggering system for fast, economical bridge testing. Quantitative testing of bridges offers the ability to manage the structures better than with just qualitative inspections. The primary objectives of the proposed system …
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Factor influencing headcut migration within a cohesive Texas Black-Land gully.
… gullies, mainly due to the limitations posed by field instrumentation and the high shear strength of clay soils. Cohesive gullies, e.g. those found in Vertisols may be regarded as an end member gully types in erosion studies. As such, critical assessments of the evolution and failure mechanisms …
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Mitigation of differential movements at railroad bridge transition zones
… to reduce the frequency of track resurfacing, an instrumentation and numerical modeling study was undertaken to (1) identify the root causes of the differential movement at transition zones, (2) develop and improve existing measurement techniques to evaluate track performance, and (3) recommend …
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Analysis of the design of railroad track superstructure components for rail transit applications
… Transit Administration (FTA). Focusing on field characterization of the performance of prestressed monoblock concrete crossties and premium elastic fastening systems, this project aimed to quantify the behavior of the aforementioned track superstructure elements under different rail transit …
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Assessment of structural concrete approach slab cracking at integral abutment bridges
… approach slabs have been observed at IABs. Field observations indicate that approach slabs with skews larger than 30° tend to have diagonal cracks that concentrate in the acute corner and travel in the direction of the obtuse corner. Longitudinal cracks are more common in approach slabs that …
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Field test program of the concrete crosstie and fastening system
… concrete crossties and fastening systems, field experimentation was performed at the Transportation Technology Center (TTC) in Pueblo, CO by researchers from the University of Illinois at Urbana-Champaign (UIUC). This paper focuses on the transfer of vertical and lateral loads through the …
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The Impact of Rolling Dynamic Compaction
… impact roller. This research has used full-scale field trials and bespoke instrumentation to capture the ground response due to dynamic loading in homogeneous soil conditions. It was found that towing speed quantifiably influenced the energy imparted into the ground, with towing speeds of 10-12 …
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Structural behavior of integral abutment bridge approach slabs
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms