Encyclopedia

deflectometer

deflectometer

[‚dē‚flek′täm·əd·ər]
(engineering)
An instrument used for measuring minute deformations in a structure under transverse stress.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

deflectometer

A device for measuring the amount of bending in a beam induced by a transverse load.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive
The equipment include Ground Penetrating Radar (GPR), Light Weight Deflectomete (LWD), Falling Weight Deflectometer (FWD), Automated Road Analyser (ARAN), and other advanced laboratory equipment for asphalt mix design.
CIHT discusses techniques of pavement construction in Qatar
Micro-Epsilon supplies a deflectometer for inspecting shiny surfaces, while Irish startup, Viztronics, has also built systems based on deflectometry that are being trialled for glass inspection
Reflections on glass making: Greg Blackman explores some novel ways of imaging glass, including a 3D technique to measure the flatness of glass panels
These will include Defloctograph and Falling Weight Deflectometer surveys and Traffic Count surveys consisting of video camera counts and rubber tube detector counts being carried out on public highway.
Motorists face traffic problems over HS2 work
The measurement of pavement stiffness in the literature varies from Benkelman beam tests (Jamieson and Cenek 1999) to Falling Weight Deflectometer (FWD) tests (Schmidt, Ullidtz, and Jensen 2009).
Haul road rolling resistance and pavement condition
At present, there are many kinds of nondestructive testing (NDT) technologies of subgrade defect, for example, ground-penetrating radar (GPR), hammer sounding, acoustic tomography, falling weight deflectometer (FWD), and time-domain reflectometry (TDR) [3].
Dielectric Characteristics of Unsaturated Loess and the Safety Detection of the Road Subgrade Based on GPR
Nazarian, "Simulation of light weight deflectometer measurements considering nonlinear behavior of geomaterials," Transportation Research Record: Journal of the Transportation Research Board, vol.
Initial Hypotheses for Modeling and Numerical Analysis of Rockfill and Earth Dams and Their Effects on the Results of the Analysis
Before zeroing the deflectometer, each species was loaded with approximately 1,030 N to ensure proper placement and seating of the load heads.
Comparison of wood utility crossarm properties from 1995 and 2015
To verify the anti-impact ability of this test site, the distribution of the dynamic deformation modulus [E.sub.vd] along the longitudinal direction of embankment top surface was measured with a portable falling weight deflectometer, and the results are shown in Figure 3.
Field Testing and Analysis of Embankment Vibrations Induced by Heavy Haul Trains
The resilient modulus values were defined based on back-analysis of data collected by a falling weight deflectometer (FWD) offered by Dnit, from surveys conducted in five federal highways (BR 158, BR 285, BR 287, BR 290 and BR 392).
Cost-benefit analysis of the construction of different flexible pavement structures considering the axle load and type of binder/Analise custo/beneficio de implantacao de diferentes estruturas de pavimentos flexiveis considerando a carga por eixo e o tipo de ligante
Stiffness measurements of the compacted base and subbase aggregates can be accomplished using a lightweight deflectometer used according to ASTM E2835 Standard Test Method for Measuring Deflections Using a Portable Impulse Plate Load Test Device.
Concrete turns green, figuratively speaking
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