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Using termination points and 3D visualization for dimensional control in prefabrication
Automation in Construction ( IF 9.6 ) Pub Date : 2021-10-13 , DOI: 10.1016/j.autcon.2021.103998
Mohammad Mahdi Sharif 1 , Carl Haas 1 , Scott Walbridge 1
Affiliation  

To increase productivity, quality, and safety, heavy industrial construction projects are increasingly adopting prefabrication and modularization techniques. This shift, in turn, has resulted in fabrication shops fabricating more complex assemblies with tighter tolerances. However, most measurement in these shops is conducted using manual hand measurement tools, which can be costly and is known to cause significant rework due to geometric noncompliance of termination points in particular. Termination points are defined as the coordinate system points where assemblies connect or are constrained. Automated, 3D-scanning measurement and visualization systems can potentially be accurate, repeatable, and objective sources of termination point data. In this paper, a new framework for classification and calculation of termination points is presented that is based on automated, 3D-scanning measurement and visualization. The utilization of the framework enables fabrication shops and project owners to adopt effective 3D measurement solutions. To investigate the usefulness of the defined framework, a termination-point-based scan-vs-BIM method is developed for objects with circular cross sections, such as pipe spool assemblies. The method was validated in an industrial-scale experimental study. The study demonstrated that the new framework can be used to develop applications that are more accurate and provide superior visualization to craft workers during fabrication, and thus potentially improve productivity and reduce rework.



中文翻译:

在预制中使用终端点和 3D 可视化进行尺寸控制

为了提高生产力、质量和安全性,重工业建筑项目越来越多地采用预制和模块化技术。这种转变反过来又导致制造车间制造具有更严格公差的更复杂的组件。然而,这些车间中的大多数测量都是使用手动测量工具进行的,这可能成本高昂,并且已知会导致大量返工,特别是由于端接点的几何不符合要求。终止点定义为装配体连接或受约束的坐标系点。自动化的 3D 扫描测量和可视化系统可能是准确、可重复和客观的终点数据来源。在本文中,提出了一种基于自动化 3D 扫描测量和可视化的分类和计算端点的新框架。该框架的使用使制造车间和项目所有者能够采用有效的 3D 测量解决方案。为了研究定义的框架的有用性,为具有圆形横截面的对象(例如管段组件)开发了一种基于端点的扫描与 BIM 方法。该方法在工业规模的实验研究中得到验证。该研究表明,新框架可用于开发更准确的应用程序,并在制造过程中为工艺工人提供卓越的可视化,从而有可能提高生产力并减少返工。该框架的使用使制造车间和项目所有者能够采用有效的 3D 测量解决方案。为了研究定义的框架的有用性,为具有圆形横截面的对象(例如管段组件)开发了一种基于端点的扫描与 BIM 方法。该方法在工业规模的实验研究中得到验证。该研究表明,新框架可用于开发更准确的应用程序,并在制造过程中为工艺工人提供卓越的可视化,从而有可能提高生产力并减少返工。该框架的使用使制造车间和项目所有者能够采用有效的 3D 测量解决方案。为了研究定义的框架的有用性,为具有圆形横截面的对象(例如管段组件)开发了一种基于端点的扫描与 BIM 方法。该方法在工业规模的实验研究中得到验证。该研究表明,新框架可用于开发更准确的应用程序,并在制造过程中为工艺工人提供卓越的可视化,从而有可能提高生产力并减少返工。为具有圆形横截面的对象(例如管段组件)开发了一种基于端点的扫描与 BIM 方法。该方法在工业规模的实验研究中得到验证。该研究表明,新框架可用于开发更准确的应用程序,并在制造过程中为工艺工人提供卓越的可视化,从而有可能提高生产力并减少返工。为具有圆形横截面的对象(例如管段组件)开发了一种基于端点的扫描与 BIM 方法。该方法在工业规模的实验研究中得到验证。该研究表明,新框架可用于开发更准确的应用程序,并在制造过程中为工艺工人提供卓越的可视化,从而有可能提高生产力并减少返工。

更新日期:2021-10-13
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