相关实验视频

Updated: Jul 19, 2025

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Published on: May 15, 2017

在检测聚乙烯管道缺陷时应用太赫兹非破坏性测试技术

Hailiang Nie¹, Fengdan Hao², Litao Wang³

¹Institute of Safety Assessment and Integrity, State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, Tubular Goods Research Center of CNPC, Xi'an 710077, China.

|August 7, 2023

概括

太赫兹时域光谱有效检测非黑色聚乙烯管道中的缺陷. 由于碳吸收,需要更高功率的太赫兹设备来检查黑色聚乙烯管道,从而推进天然气管道的非破坏性测试.

科学领域:

材料科学材料科学材料科学
工程工程师工程师工程师
物理物理学物理

背景情况:

聚乙烯 (PE) 管道对于城市天然气配送至关重要.
目前用于PE管道的非破坏性测试 (NDT) 方法缺乏成熟度和可靠性.
对于非金属管道,迫切需要先进的NDT技术.

研究的目的:

调查太赫兹时域光谱学 (THz-TDS) 的应用,以检测PE管道的内部缺陷.
评估THz-TDS对非黑色和黑色PE管道材料的有效性.
确定THz-TDS的可行性,作为PE管道的可行的NDT方法.

主要方法:

使用太赫兹时域光谱学 (THz-TDS) 来分析PE管样本.
在PE管样本中引入预制缺陷以进行受控测试.
对比了不同功率的特拉赫兹设备的性能,用于检测不同类型的PE管道中的缺陷.

主要成果:

在非黑色PE管道中,THz-TDS成功检测出常见的缺陷,误差为<10%.
更高功率的太赫兹设备在检测黑色PE管道缺陷方面表现出能力.
低功率设备因碳含量和强的太赫兹波吸收而与黑色PE管道扎,导致图像分辨率差.

结论:

太赫兹时域光谱是非金属PE管道的一个有前途的NDT技术.
对于黑色PE管道的THz-TDS的有效性取决于设备功率,对于含碳材料来说,需要更高的功率.
这项研究为改善非金属管道行业的检查技术铺平了道路.

更多相关视频

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Published on: August 30, 2012

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors

Published on: January 16, 2020

相关概念视频

Non-destructive Tests for Concrete Strength

Non-destructive Tests for Concrete Strength

The rebound hammer test, also known as the Schmidt hammer test, is a non-destructive technique for evaluating the hardness of concrete and, indirectly, the strength of concrete. It operates on the principle that the rebound of a spring-driven mass from a concrete surface correlates to the surface's hardness. The device comprises a mass within a tubular housing, a spring mechanism, and a plunger that strikes the concrete. Upon release, the energy imparted to the mass by the spring causes it...