Summary

Mm-wave and THz Scanning for Non-invasive Farm Product Safety

Nguyen NGOC MAI-KHANH Shintaro TAKADA Keizo INAGAKI Tran NGOC LE Tran THI MY HANH Hinano SUGIMOTO Akio HIGO Hitoshi TABATA Makoto IKEDA Bich-Yen NGUYEN Tetsuya KAWANISHI 

Vol.106 No.10 pp.892-907

Publication Date:2023/10/01

Online ISSN:2188-2355

Print ISSN:0913-5693

Type of Manuscript:Special Section on Artificial Intelligence of Things (AIoT) for Smart Farming

Category:

Keyword:
Mm-wave, THz, food safety, melamine, detection, scanning, sensing, non-invasive, smart farming, integrated antenna, system-in-package, 

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Summary:
Our project is to develop a portable and cost-effective scanner for real-time detection of foreign contaminants in agricultural staples and/or animal feed with a unique and novel mm-wave/THz sensing capability. This paper presents both qualitative and quantitative detection methods for the harmful substance melamine in a wide frequency range, from mm-wave to the THz range. Melamine has been illegally forcibly added to meals, including powdered milk or pet feed, in order to raise the protein level, one of the most crucial quality indicators. A method for quantitative detection of melamine is presented in this paper. Validation in both mm-wave and THz ranges is performed using experiments. The measurement results show that the estimation of melamine content in mixtures can be performed in several mm-wave and THz frequency bands, including 220-330GHz, 2THz, 2.26THz, and 4THz. Especially the peak around 4THz of melamine was found and to our knowledge this is the first study and THz measurement. To further evaluate the properties and response of melamine and its mixtures in the infrared spectrum and other chromatography, the quantitative determination of melamine was performed by both Fourier-transform infrared spectroscopy (FTIR) method and ultra-performance liquid chromatography (HPLC). These frequency bands of melamine property are useful for implementing a portable detection system with an integrated antenna array or THz pulse transceiver since the size of the components and the sampling resolution essentially depend on the operating frequency band or wavelength.

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Online ISSN:2188-2355