On-line detection of Brownheart in Braeburn apples using near infrared transmission measurements
On-line detection of Brownheart in Braeburn apples using near infrared transmission measurements
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DOI：
10.1016/j.postharvbio.2005.04.011
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发表时间：
2005-08-01
影响因子：
7
通讯作者：
Jordan, RB
中科院分区：
文献类型：
--
作者：
McGlone, VA;Martinsen, PJ;Jordan, RB
两个原型在线近红外传输系统用于非破坏性地测量患有褐心病的“Braeburn”苹果（Malus Domestica Borkh.）内部组织褐变（ITB）的百分比。一种系统基于延时积分光谱（TDIS）原理，其中穿过移动物体传输的光在穿过光谱仪视场时被电子跟踪。另一种是大孔径光谱仪（LAS），是一种更传统的设计，当水果穿过视野时，来自物体的光会累积在一系列一次性测量中。每个系统都经过优化配置，以典型的分级机速度（500 mm s(-1) 或每秒大约五个水果）运行，并检测通过苹果漫射的 650-950 nm 波长范围内的低水平光。 PLS 校准方法开发的回归模型给出了与 1713 的合理相关性（R-2 类似于 0.7-0.9）和较低的预测误差（RMSECV 类似于 4-7%）。 LAS 系统在每种情况下都表现出色，当对围绕水果圆周进行的两次独立光谱测量进行平均时，获得了最佳结果（R-2 类似于 0.9，RMSEP 类似于 4.1%）。建议使用多重测量 LAS 系统来快速在线测量苹果中的 ITB。 (c) 2005 Elsevier B.V. 保留所有权利。
Two prototype on-line NIR transmission systems were used to non-destructively measure the percentage of internal tissue browning (ITB) in 'Braeburn' apples (Malus domestica Borkh.) afflicted with Brownheart. One system was based on the principle of time-delayed integration spectroscopy (TDIS) in which light transmitted through a moving object was electronically tracked as it moved through the spectrometer's field-of-view. The other, a large aperture spectrometer (LAS), was a more conventional design in which the light from the object is accumulated in a series of one-shot measurements as the fruit progresses through the field-of-view. The systems were each optimally configured to operate at typical grader speeds (500 mm s(-1) or approximately five fruit per second) and detect the low levels of light diffusely transmitted through apples in the wavelength range 650-950 nm. Regression models developed by PLS calibration methods gave reasonable correlations with 1713 (R-2 similar to 0.7-0.9) and low prediction errors (RMSECV similar to 4-7%). The LAS system was superior in every case with the best results (R-2 similar to 0.9, RMSEP similar to 4.1%) being obtained when two separate spectral measurements, made around the circumference of the fruit, were averaged. Multiple measurement LAS systems are recommended for fast on-line measurement of ITB in apples. (c) 2005 Elsevier B.V. All rights reserved.