Sensor-based in-situ detector for distinguishing between forchlorfenuron treated and untreated kiwifruit at multi-wavelengths
Sensor-based in-situ detector for distinguishing between forchlorfenuron treated and untreated kiwifruit at multi-wavelengths
复制标题
基于传感器的原位检测器，用于在多波长下区分经氯吡脲处理和未经处理的猕猴桃
DOI：
10.1016/j.biosystemseng.2019.11.019
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发表时间：
2020-02-01
影响因子：
5.1
通讯作者：
Zhu, Zhuozhuo
中科院分区：
文献类型：
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作者：
Guo, Wenchuan;Wang, Kai;Zhu, Zhuozhuo
氯吡脲（CPPU）能提高猕猴桃的产量，但会降低猕猴桃的品质和货架期，并增加贮藏期间的腐烂率。因此，对CPPU处理后的猕猴桃进行鉴定是猕猴桃产业亟待解决的课题。本工作提出了一种方便的，低成本的，基于传感器的手持检测器，用于识别猕猴桃处理与CPPU通过测量反射率在五个波长（660，940，1064，1250和1445 nm），这是从931 nm到1689 nm的选择，并确定在市场上可用的光学滤波器。该检测仪由微控制器、光源、多波长选择装置、光检测和信号处理模块、显示器和电池组成。多波长选择装置由五个滤光器执行，并且反射光由五个光电二极管感测。整个系统采用STM32单片机控制。采用偏最小二乘判别分析建立了CPPU处理猕猴桃与未处理猕猴桃的判别模型。以不同浓度的CPPU处理的两个猕猴桃品种（‘华优’和‘徐香’）为试材，对该检测仪进行了检测。试验表明，该检测器对“花油”和“徐香”的准确率分别为92.9%和85.8%，检测结果可在2s内给出。该研究使识别CPPU处理的猕猴桃成为可能，并为开发CPPU处理的其他水果（如葡萄，草莓等）的检测器提供了有价值的信息。由爱思唯尔有限公司出版。保留所有权利。
Forchlorfenuron (CPPU) can increase the production of kiwifruit, but it decreases the fruit quality and shelf life, and increases the rotting rate during storage. Therefore, identifying the kiwifruit treated with CPPU is an urgent task to be solved in the kiwifruit industry. This work presents a convenient, low-cost, and sensor-based handheld detector for identifying kiwifruit treated with CPPU by measuring reflectance at five wavelengths (660, 940, 1064, 1250 and 1445 nm), which were selected from 931 nm to 1689 nm and determined by available optical filters on the market. The detector consisted of a micro-controller, a light source, a multi-wavelength selection apparatus, a light detection and signal processing module, a display and a battery. The multi-wavelength selection apparatus was carried out by five optical filters, and the reflected light was sensed by five photodiodes. The whole system was controlled using a STM32 micro-controller. Partial least squares discrimination analysis was used to build the model for distinguishing kiwifruit between CPPU treated and untreated. The detector was tested on two varieties of kiwifruit ('Huayou' and 'Xuxiang') treated with different concentration levels of CPPU. The test showed that the detector could offer accuracies of 92.9% and 85.8% for 'Huayou' and 'Xuxiang', respectively, and the detection result can be given in 2 s. The study makes identifying kiwifruit treated with CPPU be possible, and it offers valuable information for developing detectors for other fruits treated with CPPU, such as grape, strawberry, etc. (C) 2019 IAgrE. Published by Elsevier Ltd. All rights reserved.