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Proceedings Paper

Nondestructive measuring soluble solid contents and weight of intact pears based on on-line near-infrared spectroscopy
Author(s): Yuanyuan Pan; Xudong Sun; Xiaoling Dong; Yong Hao; Yande Liu
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Paper Abstract

The objective of this study was to investigate the potential of NIRS as an accurate, reliable and nondestructive method to measure SSC and weight parameters of intact pears. The effects of fruit moving speed on SSC and weight prediction were evaluated. Diffuse reflectance spectra of 200 samples were collected by a fiber spectrometer in the range of 840~950nm at 5 different speeds: 2, 3, 4, 5 and 6 fruits per second. One-way analysis of variance (ANOVA) method was employed to assess effect of speed with partial least squares regression (PLSR). At the speed of 4 fruits per second, five types of data pretreatment were adopted before calibration. Multiple linear regression (MLR), principal component regression (PCR) and PLSR models were developed in the calibration set (n=150). 50 unknown samples were applied to evaluate the performance of the models. SSC was measured with a root mean squares error of prediction (RMSEP) comprised between 0.60 and 0.88 °Brix and correlation coefficient (r) between 0.57 and 0.85. As far as weight was concerned, the best results were obtained by PLSR combined with smoothing spectra (r=0.93, RMSEP=14.29 g). The results demonstrated that on-line NIRS was feasible for measuring SSC and weight of intact pears nondestructively.

Paper Details

Date Published: 11 October 2010
PDF: 6 pages
Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 76560K (11 October 2010); doi: 10.1117/12.864224
Show Author Affiliations
Yuanyuan Pan, East China Jiaotong Univ. (China)
Xudong Sun, East China Jiaotong Univ. (China)
Xiaoling Dong, Jiangxi Normal Univ. (China)
Yong Hao, East China Jiaotong Univ. (China)
Yande Liu, East China Jiaotong Univ. (China)


Published in SPIE Proceedings Vol. 7656:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment

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