1.1 激光仿形是一种非接触检测方法，用于创建管壁轮廓和内部测量，使用标准CCTV管道检测系统、360度激光投影仪，通过红外传感器和几何仿形软件进行测量。本规程涵盖了测量程序，以确定与设计相比安装管道内表面的任何偏差。测量可用于验证安装是否符合验收的设计要求，或收集有助于评估由于结构偏差或劣化导致的管道或导管状况的数据。本标准实践提供了激光轮廓测量方法的最低要求，以满足工程师、承包商、业主、监管机构和金融机构的需求。 1.2 本规程适用于所有类型的管道材料、所有类型的结构和管道形状。 1.3 本规程适用于减压和重力流雨水管、排水沟、生活污水管和直径为6 在里面至72英寸。(150 毫米和1800毫米）。 1.4 本标准不包括管道检查的所有方面，例如接头间隙、接头中的土壤/水渗透、裂缝、孔洞、表面损坏、维修、腐蚀和与这些条件相关的结构问题。 1.5 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.6 剖面分析过程可能需要实际进入管线、入口人孔和可能存在安全隐患的道路沿线作业。 1.7 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 但是，使用规定的激光环形轮廓仪（按照中的规定列出并贴上标签）没有特别的安全危险 1.3 ) . 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 激光轮廓评估是一种质量控制工具，用于识别和量化安装后的变形、物理损伤和其他管道异常，为确定工艺质量和符合项目规范提供手段和方法。激光轮廓可用于: 4.1.1 结构形状、横截面积和缺陷的测量； 4.1.2 收集管道修复或更换设计所需的数据；和 4.1.3 修复、更换或新施工工艺验证后。 4.2 激光轮廓预验收和状态评估调查以清晰简洁的方式提供重要信息，包括但不限于验收前管道状态的图形和静止帧数字图像，从而提供安装质量和椭圆度百分比、变形、挠度或偏差的客观数据，这通常不可能通过心轴或仅CCTV调查进行检查。

1.1 Laser profiling is a non-contact inspection method used to create a pipe wall profile and internal measurement using a standard CCTV pipe inspection system, 360 degree laser light projector, a measurement by means of infrared sensors and geometrical profiling software. This practice covers the procedure for the measurement to determine any deviation of the internal surface of installed pipe compared to the design. The measurements may be used to verify that the installation has met design requirements for acceptance or to collect data that will facilitate an assessment of the condition of pipe or conduit due to structural deviations or deterioration. This standard practice provides minimum requirements on means and methods for laser profiling to meet the needs of engineers, contractors, owners, regulatory agencies, and financing institutions. 1.2 This practice applies to all types of pipe material, all types of construction, and pipe shapes. 1.3 This practice applies to depressurized and gravity flow storm sewers, drains, sanitary sewers, and combined sewers with diameters from 6 in. to 72 in. (150 mm and 1800 mm). 1.4 This standard does not include all aspects of pipe inspection, such as joint gaps, soil/water infiltration in joints, cracks, holes, surface damage, repairs, corrosion, and structural problems associated with these conditions. 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6 The profiling process may require physical access to lines, entry manholes, and operations along roadways that may include safety hazards. 1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. There are no safety hazards specifically, however, associated with the use of the laser ring profiler specified (listed and labeled as specified in 1.3 ) . 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Laser profiling assessment is a quality control tool for identifying and quantifying deformation, physical damage, and other pipe anomalies after installation, providing means and methods for determining the quality of workmanship and compliance with project specifications. Laser profiling can be used for: 4.1.1 Measurement of the structural shape, cross sectional area and defects; 4.1.2 Collection of data needed for pipe rehabilitation or replacement design; and 4.1.3 Post rehabilitation, replacement or new construction workmanship verification. 4.2 A laser profile pre-acceptance and condition assessment survey provides significant information in a clear and concise manner, including but not limited to graphs and still frame digital images of pipe condition prior to acceptance, thereby providing objective data on the installed quality and percentage ovality, deformation, deflection or deviation, that is often not possible from an inspection by either a mandrel or CCTV only survey.