A building curtain wall security inspection system based on terahertz wave imaging

Chongliang Gao; Jie Gao; Yajun Cao

doi:10.1117/12.3025239

21 February 2024 A building curtain wall security inspection system based on terahertz wave imaging

Chongliang Gao, Jie Gao, Yajun Cao

Proceedings Volume 13080, International Conference on Frontiers of Applied Optics and Computer Engineering (AOCE 2024); 1308002 (2024) https://doi.org/10.1117/12.3025239
Event: International Conference on Frontiers of Applied Optics and Computer Engineering, 2024, Kunming, China

Abstract

A non-destructive security inspection system for building curtain walls based on millimeter wave imaging was designed to address the difficulty in detecting internal components of building curtain walls. This system is based on the principle of active millimeter wave imaging, which can scan the components inside the curtain wall and image them in the upper computer. It mainly includes a terahertz wave irradiation source and receiver, as well as a point-to-point imaging system consisting of a pair of 90 ° off axis parabolic mirrors and a semi-transparent and semi-reflective mirror. In order to simplify the system structure, a scheme of transmitting echoes along the same path is proposed. This scheme has a simple structure and can effectively solve the problem of the echo signal being affected by the reflected waves generated by the upper and lower surfaces of the curtain wall and the oscillating reflected waves generated between the lower surface of the curtain wall and the metal components during the process of millimeter wave penetration through the curtain wall. It can also achieve point-to-point clear imaging with an imaging accuracy of approximately 3 mm.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Chongliang Gao, Jie Gao, and Yajun Cao "A building curtain wall security inspection system based on terahertz wave imaging", Proc. SPIE 13080, International Conference on Frontiers of Applied Optics and Computer Engineering (AOCE 2024), 1308002 (21 February 2024); https://doi.org/10.1117/12.3025239

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KEYWORDS

Imaging systems

Curtains

Terahertz radiation

Reflection

Parabolic mirrors

Extremely high frequency

Inspection

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