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Assessment of bridge expansion joints using long-term displacement measurement under changing environmental

Youliang DING, Aiqun LI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3, Pages 374-380 doi: 10.1007/s11709-011-0122-x

Abstract: This paper addresses the problem of condition assessment of bridge expansion joints using long-term measurementincrease in temperature and to decrease with increased traffic loading, while the correlation between displacementBased on these models, the effects of the environmental conditions are removed to obtain the normalized displacement

Keywords： structural health monitoring displacement expansion joint temperature effect wind effect traffic loading

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A digital moiré fringe method for displacement sensors Article

Jian WU,Ting-ting ZHOU,Bo YUAN,Li-qiang WANG

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 9, Pages 946-953 doi: 10.1631/FITEE.1500270

Abstract: In this study, a displacement measurement method based on digital moiré fringe is described and experimentallyThis method has the effects of amplifying displacement and averaging the grating lines error, the sameAt the same time, the proposed system is much easier to assemble and the measurement resolution can beOne displacement measuring system based on this method was built up.Experiment results show that its measurement errors are less than 0.3 μm and less than 0.12 μm at the

Keywords： Digital moiré fringe Displacement measurement Grating

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Displacement measuring grating interferometer: a review Special Feature on Precision Measurement and Inst

Peng-cheng HU, Di CHANG, Jiu-bin TAN, Rui-tao YANG, Hong-xing YANG, Hai-jin FU

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 5, Pages 631-654 doi: 10.1631/FITEE.1800708

Abstract:

A grating interferometer, called the “optical encoder,” is a commonly used tool for precise displacementMeanwhile, numerous structures of grating interferometers with a high optical fold factor, a large measurementThe development of incremental displacement measuring grating interferometers achieved in recent years

Keywords： Grating interferometer Optical encoder Displacement measurement Precision measurement

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Principle of Laser Nano-meter Measurement Ruler

Zhang Shulian

Strategic Study of CAE 2005, Volume 7, Issue 3, Pages 27-34

Abstract: This paper reports the progress in investigating Laser Nano-meter Measurement Ruler, which is just theThe consequence is that 丄 light suppressing // light dying out in the first A /8 of mirror displacementCalculating the number of polarization regions the displacement is known.The direction of displacement can be judged by the difference of polarization of each region.The measurement range： 12 mm, resolution： 79.08 nm, linearity： 5×l0^-6, 2σ = 0.314

Keywords： displacement measurement HeNe laser mode competition frequency splitting cavity tuning longitudinal mode

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density measurement for plastic injection molding via ultrasonic technology

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0714-2

Abstract: Therefore, in-situ density measurement is of great interest and has significant application valueThis study is the first to propose an in-situ density measurement method using ultrasonic technologyThe proposed method has the advantages of in-situ measurement, non-destructive, high accuracy,

Keywords： ultrasonic measurement melt density in-situ measurement injection molding

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Lateral displacement of soft ground under vacuum pressure and surcharge load

Chin-Yee ONG, Jin-Chun CHAI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2, Pages 239-248 doi: 10.1007/s11709-011-0110-1

Abstract: Surcharge load (e.g. embankment fill) will induce settlement and outward lateral displacement, whilevacuum pressure will induce settlement and inward lateral displacement of a ground.Ideally, combination of surcharge load and vacuum pressure can reduce or minimize the lateral displacementFor the conditions investigated, the results indicate that the outward lateral displacement increasesAlso, it is shown that for a given and condition, lateral displacement reduces with the increase

Keywords： vacuum consolidation lateral displacement PVD finite element analysis surcharge load

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Influence of advanced engineering measures on displacement and stress field of surrounding rock in tunnels

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0966-x

Abstract: A numerical method was used to investigate the influence of LRAF methods on the stress and displacementThe numerical results indicated that the anchor cable and grouting modification reduced the displacementThe anti-fault cavern resisted the dislocation displacement and reduced the maximum dislocation magnitude, displacement gradient, and shear stress.

Keywords： anti-fault effect engineering measures LRAF method stress and displacement field tunnel-crossing

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Quality control based on electrode displacement and force in resistance spot welding

Chuntao JI, Lipeng DENG

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4, Pages 412-417 doi: 10.1007/s11465-010-0114-x

Abstract: The behaviors of electrode displacement and force during spot welding under various conditions, such

Keywords： aluminum electrode displacement electrode force nugget size data acquisition

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Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0731-1

Abstract: Limited optical measured displacement responses are utilized to reconstruct the full-field strain.A displacement-to-strain transformation matrix is derived on the basis of the blade mode shapes in theThree discrete vibrational displacement responses measured by laser triangulation sensors are used toThis paper provides a low-cost, real-time, and visualized measurement of blade full-field dynamic strainusing displacement response, where the traditional SGs would fail.

Keywords： aero-engine blade displacement response dynamic strain reconstruction mode shape strain gauge

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Evaluation of liquefaction-induced lateral displacement using Bayesian belief networks

Mahmood AHMAD, Xiao-Wei TANG, Jiang-Nan QIU, Feezan AHMAD

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1, Pages 80-98 doi: 10.1007/s11709-021-0682-3

Abstract: Liquefaction-induced lateral displacement is responsible for considerable damage to engineered structuresTherefore, an accurate estimation of lateral displacement in liquefaction-prone regions is an essentialThis paper presents a novel probabilistic framework for evaluating liquefaction-induced lateral displacementThe results reveal that the BBN models are able to learn complex relationships between lateral displacementstudy also presents a sensitivity analysis to evaluate the impacts of input factors on the lateral displacement

Keywords： Bayesian belief network seismically induced soil liquefaction interpretive structural modeling lateral displacement

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Quality monitoring of resistance spot welding based on electrode displacement characteristics analysis

ZHANG Pengxian, ZHANG Hongjie, CHEN Jianhong, MA Yuezhou

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 3, Pages 330-335 doi: 10.1007/s11465-007-0058-y

Abstract: First, twelve parameters related to weld quality are mined from electrode displacement signal on the

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Pore-scale simulation of water/oil displacement in a water-wet channel

Jin Zhao, Guice Yao, Dongsheng Wen

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 4, Pages 803-814 doi: 10.1007/s11705-019-1835-y

Abstract: The results show that during a water displacement process, an initial continuous oil phase can be snappedwetting and non-wetting phases, the snapped-off phenomenon can be eliminated or reduced during the displacementA stable displacement can be obtained under high number conditions.Different displacement effects can be obtained at the same number due to its significant influence

Keywords： VOF pore scale immiscible displacement EOR snap-off Ca

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3D Microdisplacement Monitoring of Large Aircraft Assembly with Automated In Situ Calibration Article

Zhenyuan Jia, Bing Liang, Wei Liu, Kun Liu, Jianwei Ma

Engineering 2022, Volume 19, Issue 12, Pages 105-116 doi: 10.1016/j.eng.2021.02.023

Abstract: sensors, which concerns the extrinsic sensor parameters, such as the probe base point (PBP) and the unit displacement

Keywords： Aircraft manufacture Assembly Calibration Condition monitoring Displacement measurement

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Research on direct digital process of inductance sensor

WANG Xuan-ze, YANG Lian-gen, ZHONG Yu-ning

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 3, Pages 317-322 doi: 10.1007/s11465-006-0023-1

Abstract: Amplitude-displacement and phase-displacement equations are deduced for non-ideal carrier wave and inductanceAccording to the characteristic of the amplitude-displacement and phase-displacement curves, we obtaindisplacement by phase and amplitude respectively when the sensor is close to the zero point positionThe experiment showed that this method can improve precision of measurement, and it can also work for

Keywords： traditional corresponding phase-displacement Amplitude-displacement characteristic

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Research of the Exponential Smoothing Technology forForecasting Slope Displacement

Shen Liangfeng

Strategic Study of CAE 2007, Volume 9, Issue 6, Pages 94-97

Abstract: The forecasting model of exponential smoothing to forecast the displacement at Observation PointAnd it shows that this model may be well applied to the forecast of the displacement in the deformation

Keywords： exponential smoothing forecasting slope displacement self-adaptive filtering