Jiang Yu-ying, Lian Fei-yu, Zhang Yuan, Xia Shan-hong
Guang Pu Xue Yu Guang Pu Fen Xi. 2014 Nov;34(11):2897-900.
Terahertz time-domain spectroscopy (THz-TDS) is used to investigate the spectra properties of the wheat kernel with various deterioration degrees in the frequency range of 0.2-1.6 THz. The absorption coefficient and refractive index of normal, worm-eaten, moldy and sprouting wheat kernel were calculated. Comparison of the experimental data, clearly indicates that changes in the absorption coefficient and refractive index are recorded, different wheat samples have different optical parameters. The absorption coefficient of normal wheat sample is more obvious and higher than others; refractive index increases as the frequency increases. THz-TDS can be employed to evaluate the quality of wheat kernel nondestructively. The results show that THz-TDS is a promising and new experimental method for quality analyses and control for agricultural production detection. This study will provide an important guidance for nondestructive detecting the quality of stored-grain.
太赫兹时域光谱（THz - TDS）用于研究频率范围为0.2 - 1.6太赫兹的不同劣化程度小麦籽粒的光谱特性。计算了正常、虫蛀、发霉和发芽小麦籽粒的吸收系数和折射率。实验数据比较清楚地表明，记录到了吸收系数和折射率的变化，不同小麦样品具有不同的光学参数。正常小麦样品的吸收系数更明显且高于其他样品；折射率随频率增加而增大。太赫兹时域光谱可用于无损评估小麦籽粒的品质。结果表明，太赫兹时域光谱是一种用于农业生产检测中品质分析与控制的有前景的新实验方法。本研究将为无损检测储粮品质提供重要指导。
