电子测量与仪器学报

周子悦,年夫顺,孙超.基于调频连续波的太赫兹透视测距技术[J].电子测量与仪器学报,2023,37(11):143-151

基于调频连续波的太赫兹透视测距技术

Terahertz perspective ranging technology based on frequency modulated continuous wave

DOI：

英文关键词:terahertz linear frequency modulated continuous wave ranging permittivity terahertz imaging

基金项目:国家重点研发计划(2021YFF0701503)项目资助

作者	单位
周子悦	1. 中北大学仪器与电子学院
年夫顺	1. 中北大学仪器与电子学院，2. 中电科思仪科技股份有限公司
孙超	2. 中电科思仪科技股份有限公司

Author	Institution
Zhou Ziyue	1. School of Instrument and Electronics, North University of China
Nian Fushun	1. School of Instrument and Electronics, North University of China,2. Ceyear Technologies Co. , Ltd.
Sun Chao	2. Ceyear Technologies Co. , Ltd.

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中文摘要:

由于太赫兹波能够穿透非金属、非极性材料,太赫兹技术能够弥补激光技术的不足,实现对目标内部的透视测距。研究分析提出基于线性调频连续波的太赫兹透视测距技术,实现了多种材料的厚度以及多层介质材料的介电常数的非接触式测量, 进一步拓展了太赫兹线性调频连续波的应用范围,为材料介电常数测量提供了新途径。以 3 种常见的材料作为检测目标,利用 0. 11~ 0. 17 THz、0. 17~ 0. 22 THz、0. 22~ 0. 33 THz、0. 33 ~ 0. 50 THz 4 个频段的太赫兹线性调频连续波实验验证方法的有效性, 并证明厚度测量和介电常数测量的精度随信号带宽的增加而提高,误差最小均可达到 1%以下。此外,以雷达天线罩陶瓷材料作为检测目标,应用太赫兹透视测距的原理,结合二维扫描架获取样品的全部信息,实现了对内部缺陷的透视成像与定位。

英文摘要:

Since terahertz waves can penetrate non-metallic and non-polar materials, terahertz technology can make up for the shortcomings of laser technology and realize perspective ranging of the inside of the target. Terahertz perspective ranging technology based on chirp continuous wave is proposed, which realizes the non-contact measurement of the thickness and dielectric constant of multilayer dielectric materials, further expands the application range of terahertz chirp continuous wave, and provides a new way for the measurement of the dielectric constant of materials. Taking three common materials as the detection target, method is verified by using terahertz linear frequency modulated continuous waves in four frequency bands: 0. 11~ 0. 17 THz, 0. 17~ 0. 22 THz, 0. 22~ 0. 33 THz, and 0. 33~ 0. 50 THz, and it is proved that the measurement accuracy increases with the increase of the signal bandwidth, with errors below one percent. In addition, taking the ceramic material used to make radomes as the inspection target, applying the principle of terahertz perspective ranging and using the two-dimensional scanning frame to obtain all the information of this sample, perspective imaging and positioning of internal defects are realized.

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