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1–20 von 77 Ergebnissen
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    Critical Assessment of Detecting Asphalt Pavement Cracks under Different Lighting and Low Intensity Contrast Conditions Using Emerging 3D Laser Technology

    Tsai, Yi-Chang James / Li, Feng | ASCE | 2012
    challenge. With the advances of sensor technology, a three-dimensional (3D) laser technology that can collect high-resolution 3D continuous ...

    Three-dimensional Detection Method for Bridge Surface Defects Based on Line-shaped Lasers

    Yu, Yong-bo / Li, Wan-heng / Zhang, Jin-quan et al. | ASCE | 2013
    assistance of line-shaped lasers, 3D structure measurements can be converted to two-dimensional ones. Based on an analysis of the applications of 3D ...

    Infrared Laser-Activated Shape Memory Actuators

    Zhang, Dawei / Liu, Yanju / Leng, Jinsong | ASCE | 2008

    This paper is concerned about the drive of shape memory styrene copolymer through an infrared optical fiber carrying infrared laser. As

     ...

    Tribological Behaviour of Laser Cladded Rail under Rolling Contact Test

    Roy, Taposh / Abrahams, Ralph / Lai, Quan et al. | ASCE | 2018
    . Laser cladding has attracted attention because of its advanced and more efficient repairing technique. In this present investigation, influence ...
    Schlagwörter: Laser cladding

    Evaluation of Variability of Macrotexture Measurement with Different Laser-Based Devices

    D’Apuzzo, M. / Evangelisti, A. / Flintsch, G. W. et al. | ASCE | 2015
    , developed to detect and remove invalid laser readings present on pavement profile data recorded by means of a high speed laser device (HSLD ...

    Detection of Pavement Distresses Using 3D Laser Scanning Technology

    Chang, K. T. / Chang, J. R. / Liu, J. K. | ASCE | 2005

    The 3D laser scanning is one of the exceptionally versatile and efficient technologies for accurately capturing large sets of 3D

     ...

    Design and Application of 3D Laser Profile Data Acquisition System

    Wu, Zhishan / Hu, Liufu / Li, Xiaobing et al. | ASCE | 2011
    3D laser profile data with a single—point laser (2 μm) was proposed to design and develop a measuring instrument. The design and realization ...

    Aggregate Surface Areas Quantified through Laser Measurements for South African Asphalt Mixtures

    Anochie-Boateng, Joseph K. / Komba, Julius / Tutumluer, Erol | ASCE | 2012
    been the fact that aggregate particles have irregular and nonideal shapes. New research capabilities, including laser-based technology, can ...

    Comparison of Schlieren and Laser Scattering Methods in Wall-Film Model Validation

    Ma, Zongzheng / Cheng, Yong / Qi, Yunliang et al. | ASCE | 2009

    In order to research the differences between the schlieren and laser scattering methods and validate the wall-film model, the wall-film

     ...

    Adoption of 3D Laser Imaging Systems for Automated Pavement Condition Assessment in the United States: Challenges and Opportunities

    Salameh, Ryan / Tsai, Yichang (James) | ASCE | 2021

    3D laser imaging systems are increasingly being adopted by state and local transportation agencies for automated

     ...

    Effect of Microstructures and Defects on Dynamic Compression and Shear Performance of Laser Metal—Deposited GH4169 Superalloy

    Yuan, Kangbo / Li, Xiaolong / Guo, Weiguo et al. | ASCE | 2020
    laser metal–deposited (LMD) GH4169. The compression and shear properties were tested at strain rates ranging from 0.001 to ...

    Evaluation and Comparison of Real-Time Laser and Electric Sand-Patch Pavement Texture-Depth Measurement Methods

    Hao, Xueli / Sha, Aimin / Sun, Zhaoyun et al. | ASCE | 2016
    real-time laser pavement texture meter (RLPTM) was realized, and a calculation method was developed. Three groups of experiments were designed ...

    Full-Lane Coverage Micromilling Pavement-Surface Quality Control Using Emerging 3D Line Laser Imaging Technology

    Tsai, Yichang / Wu, Yiching / Lewis, Zachary | ASCE | 2013
    evaluating micromilled surface quality. This paper explores the possibility of using emerging three-dimensional (3D) line laser imaging technology to ...

    Detection of Small Leakage of Long Distance Natural Gas Transporting Pipeline Based on Airborne Laser Equipment

    Li, Ke / Li, Zhenlin | ASCE | 2009

    The effectiveness of airborne laser detection equipment on buried pipeline small leakage is firstly validated by experiment. Dispersion

     ...
    Schlagwörter: Lasers

    Certification of Inertial Profilers

    Perera, Rohan W. | ASCE | 2017
    described. The height sensor types used in inertial profilers are single-spot lasers and line lasers, with single-spot lasers not being able to ...

    Field Investigations on Integrated Construction and Monitoring Technique for a Highway Tunnel Passing through Soft Fractured Ground

    Zhao, Cui / Gao, Yong-tao / Qi, Wen-rui | ASCE | 2021
    seismic prediction (TSP), ground penetrating radar (GPR), three-bench seven-step method, 3D laser scanning technology, etc. The results ...
    Schlagwörter: 3D laser scanning

    Critical Assessment of Measuring Concrete Joint Faulting Using 3D Continuous Pavement Profile Data

    Tsai, Yichang (James) / Wu, Yiching / Ai, Chengbo et al. | ASCE | 2012
    hazardous to workers and drivers. Therefore, alternative methods for effectively and safely collecting faulting data are needed. With emerging laser ...

    Texture Measurement Based on 3D Pavement Surface Images at Sub-mm Resolution

    Ding, Shihai / Yang, Enhui / Wang, Kelvin C. P. et al. | ASCE | 2018

    Traditional measurement of pavement texture is either based on line-of-sight point laser or manual process. A new

     ...

    Semi-Automated Method to Determine Pavement Condition Index on Airfields

    Hafiz, Ali / Celaya, Manuel / Jha, Vivek et al. | ASCE | 2021
    -consuming and represents a logistical challenge in busy airports. Recently developed 3D laser scanner systems can detect cracks in the pavement ...

    Using 3D Pavement Surveys to Create a Digital Twin of Your Runway or Highway

    Fox-Ivey, Richard / Laurent, John / Petitclerc, Benoit | ASCE | 2021
    -speed 3D lasers and high-accuracy blended inertial positioning systems. This enables fast, accurate, and objective pavement assessment. Recent ...