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Simulation and sensitivity analysis of light propagation in watermelon tissues for enhanced Vis/NIR spectroscopic quality assessment

文献类型： 外文期刊

作者： Liu, Yande 1 ; Chen, Jie 1 ; Wang, Guantian 1 ; Wang, Jing 2 ; Xu, Sijie 1 ; Wan, Tao 1 ; Liu, Wennan 1 ;

作者机构： 1.East China Jiaotong Univ, Sch Mechatron & Vehicle Engn, Nanchang 330013, Peoples R China

2.Inst Qual Stand & Testing Technol Agroprod CAAS, Beijing 100081, Peoples R China

关键词： Watermelon; Optical properties; Light propagation; Source-detector; Monte Carlo simulation

期刊名称：MEASUREMENT （ 影响因子：5.6； 五年影响因子：5.4 ）

ISSN： 0263-2241

年卷期： 2025 年 253 卷

页码：

收录情况： SCI

摘要： Visible/Near-Infrared (Vis/NIR) spectroscopy is an advanced analytical technique used for assessing the internal quality of watermelon. However, due to the thick pericarp and large size of the fruit, light penetration is hindered, which can hinder accurate quality assessment. This study aims to simulate the propagation of light within watermelon tissues using the Monte Carlo method to identify the optimal detection model. Initially, the single integrating sphere system combined with the inverse adding-doubling (SIS-IAD) method was employed to measure the optical properties (OPs) of different tissue layers (epicarp, endocarp, and flesh) in ten"Qilin"watermelons. Then, based on the optical properties of the watermelon tissues obtained from measurements, the propagation of light within the tissues was simulated, and a spatial sensitivity analysis was conducted. The results indicate that as the source-detector angle increases, the contribution of the flesh gradually increases while the contributions of epicarp and endocarp decrease, stabilizing at 135 degrees. To maximize the extraction of flesh information and improve the signal-to-noise ratio, the source-detector angle can be set between 90 degrees and 135 degrees, and the light source power can be increased or multiple light sources can be used. The spatial sensitivity distribution indicates that increasing the sensitivity of the detector helps to obtain deeper flesh information. Finally, the economic feasibility, application potential, user-friendliness, and practical feasibility of this method in agriculture and other industries are discussed. These findings will support the development of more precise instruments and methodologies for nondestructive watermelon quality assessment.

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