Researching | Terahertz spectral features detection and accuracy identification of explosives in high humidity environment

Optics and Precision Engineering, Volume. 31, Issue 7, 1065(2023)

Terahertz spectral features detection and accuracy identification of explosives in high humidity environment

Ziwei ZENG1...2,*, Shangzhong JIN1, Hongguang LI2, Li JIANG1 and Junwei CHU2 |Show fewer author(s)

Author Affiliations

¹College of Optical and Electronic Technology， China Jiliang University， Hangzhou3008， China

²Xi’an Institute of Applied Optics， Xi'an710065， China

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Abstract Get PDF(in Chinese)

Figures&Tables (8)

References (18)

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Figures & Tables(8)

Fig. 1. Schematic of THz pulse vertical transmission detection

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Fig. 2. Schematic of residual learning

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Fig. 3. Structure of residual convolutional neural network

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Fig. 4. Terahertz time domain spectra of JO-8 in different relative humidity

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Fig. 5. Terahertz absorption spectra of four explosives with different relative humidity

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Fig. 6. Wavelet transform graphs of explosives in different humidity

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Table 1. Block structure and output size of ResNet-50

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Table 1. Block structure and output size of ResNet-50

Layer name	Net output	Size
	$7 \times 7$ ，64，Stride=2
Conv1	$3 \times 3$ ，max pooling， stride=2	$56 \times 56$
Conv2_×	$[\begin{matrix} 1 \times 1,64 \\ 3 \times 3,64 \\ 1 \times 1,256 \end{matrix}] \times 3$	$56 \times 56$
Conv3_×	$[\begin{matrix} 1 \times 1,128 \\ 3 \times 3,128 \\ 1 \times 1,512 \end{matrix}] \times 4$	$28 \times 28$
Conv4_×	$[\begin{matrix} 1 \times 1,256 \\ 3 \times 3,256 \\ 1 \times 1,1024 \end{matrix}] \times 6$	$14 \times 14$
Conv5_×	$[\begin{matrix} 1 \times 1,512 \\ 3 \times 3,512 \\ 1 \times 1,2048 \end{matrix}] \times 3$	$7 \times 7$
Conv6	Average pooling， FC， Softmax	$1 \times 1$

Table 2. Recognition rate comparison of different methods
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Table 2. Recognition rate comparison of different methods
相对湿度传统寻峰算法本文实验方法
2% 95% 99.6%
50% 40% 96.6%
55% 35% 96.6%
67% — 96.2%

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Ziwei ZENG, Shangzhong JIN, Hongguang LI, Li JIANG, Junwei CHU. Terahertz spectral features detection and accuracy identification of explosives in high humidity environment[J]. Optics and Precision Engineering, 2023, 31(7): 1065

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Paper Information

Category: Information Sciences

Received: Aug. 1, 2022

Accepted: --

Published Online: Apr. 28, 2023

The Author Email: ZENG Ziwei (zeenng@163.com)

DOI:10.37188/OPE.20233107.1065

Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology