航天绝热泡沫的连续亚毫米波检测

基金项目:

国家自然科学基金资助项目(10390160，10474067)；国家基础研究项目(973计划(2007CB310408，2006CB302901))和北京市科技新星计划(2004B35)的资助。

详细信息

The Research of Nondestructive Inspection of Sprayed on Foam Insulation(SOFI) with Continuous-Wave of Terahertz

摘要: 简要介绍了0.2和0.38 THz的连续光波成像系统单元的内部构造及其特点。分别利用该两系统探测了航天绝热泡沫的人造缺陷，并对实验结果进行了处理和分析。结果表明0.38 THz系统所成的像较清晰，分辨率较高，在质量检测和材料无损检测领域的应用前景更广阔。
- 连续亚毫米波成像 /
- 航天绝热泡沫 /
- 无损检测
Abstract: The inner structures and characters of 0.2 THz imager and 0.38 THz imager is reported in this paper. Nondestructive detection of insulation foam defects utilizing the two systems is reported and discussed respectively. The results show that the image obtained with the 0.38THz system is clearer, and resolution is better with the 0.38 THz system as well. Therefore the 0.38 THz system can be widely used in quality monitoring and materials inspections.
- Continuous-wave terahertz imaging /
- Sprayed on foam insulation /
- Nondestructive detection

[1]	Hua Zhong, Jingzhou Xu. Nondestructive defect identification with Terahertz time-of-flight tomography[J]. IEEE Sensors Journal,2005,5(2):203-208.
[2]	Banks H T, Gibson N L. Void detection in foam with knit lines using THz pulse interrogation[J]. Mathematical and Computer Modelling,2006,44(2):807-815.
[3]	谢旭，钟华，袁韬，等.使用亚毫米技术研究航天飞机失事的原因[J].物理,2003,32(9):583-584.
[4]	周燕，穆凯军，张艳东，等.燃料箱泡沫板的连续亚毫米波无损检测[J].无损检测,2007,29(5):266-267.
[5]	Siebert K, Loffler T, Quast H, et al. All-optoelectronic continuous wave THz imaging for biomedical applications[J]. Phys Med Biol,2002,47(21):3743-3748.
[6]	Han P Y, Cho G C, Zhang X C. Time-domain transillumination of biological tissues with terahertz pulses[J]. Opt Lett,2000,25(4):242-244.
[7]	Nicholas Karpowicz, Hua Zhong, Jingzhou Xu, et al. Comparsion between pulsed Terahertz time-domain imaging and continuous wave terahertz imaging[J]. Semicond Sci Technol,2005,20(7):S293-S299.