This article presents a comprehensive state-of-the-art and state-of-the-practice review of sensing and NDT applications of THz technology and analyzes the role of THz metamaterials in enhancing the resolution and sensitivity of THz systems.

In continuation of our series of short articles on terahertz technology, today we give a brief overview of Non-Destructive Testing (NDT) — the field where modern THz instrumentation has been applied most widely. For the most part, terahertz NDT systems are designed to operate in transmission mode.

2022年4月27日 · Here, a terahertz (THz) frequency-modulated-continuous-wave non-destructive testing (NDT) imaging system is used to demonstrate the non-contact detection of a high-voltage cable (35 KV). Combined with linear scanning and axial rotation, the three-dimensional (3D) data of the columnar target is acquired, and a 3D perspective image is reconstructed.

Terahertz nondestructive evaluation pertains to devices, and techniques of analysis occurring in the terahertz domain of electromagnetic radiation. These devices and techniques evaluate the properties of a material, component or system without causing damage. [1] XRay, Optical, and THz image of a packaged IC. [2]

2018年5月19日 · Recently, THz nondestructive testing (NDT) technology has become an interesting topic. This review outlines several typical THz devices and systems and engineering applications of THz NDT techniques in composite materials, thermal barrier coatings, car paint films, marine protective coatings, and pharmaceutical tablet coatings.

2019年11月7日 · In this article, we survey various non-contact, non-destructive testing methods by way of terahertz (THz) spectroscopy and imaging designed for use in various industrial sectors.

The most promising NDT terahertz application is time of flight measurement. Such measurements are useful in measuring distances like the thickness of steel sheets or the thickness of multilayer structures, such as automotive and aeronautic coatings and the wall thickness of pipes.

2024年10月16日 · Terahertz nondestructive testing (THz-NDT) technique, as a novel and high-resolution measurement method, has emerged great potentials in the integrity assessment of composite.

2025年3月11日 · Terahertz (THz) is a new addition to the toolbox of NDT and CM. THz is an optical non-contact technique that can be implemented inline or offline. It employs non-ionizing far-infrared wavelengths between 100 and 1000 micron to sense material properties, detect faults and visualize structures.

2021年2月1日 · THz radiation presented high reliability compared to some other NDT techniques. Continuous wave terahertz (CW THz) imaging, is a variant of terahertz imaging that has been gaining scientific and technological relevance in multiple areas.