Near infrared diffuse reflectance measurement set-up in non-destructive brix measurement for intact pineapples

Conventional Brix prediction of pineapple is time-consuming and destructively. Even few of the applications of near infrared spectroscopy in diffuse reflection mode had been implemented in determining the Brix of pineapple, those applications did not investigate the effect of pineapple surface (geom...

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Main Author:	Hong, Fan Wei
Format:	Thesis
Language:	English English English
Published:	2021
Subjects:	T Technology (General)
Online Access:	http://eprints.uthm.edu.my/8264/1/24p%20HONG%20FAN%20WEI.pdf http://eprints.uthm.edu.my/8264/2/HONG%20FAN%20WEI%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/8264/3/HONG%20FAN%20WEI%20WATERMARK.pdf
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id	my-uthm-ep.8264
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spelling	my-uthm-ep.82642023-02-07T03:42:10Z Near infrared diffuse reflectance measurement set-up in non-destructive brix measurement for intact pineapples 2021-05 Hong, Fan Wei T Technology (General) Conventional Brix prediction of pineapple is time-consuming and destructively. Even few of the applications of near infrared spectroscopy in diffuse reflection mode had been implemented in determining the Brix of pineapple, those applications did not investigate the effect of pineapple surface (geometrical effect) and the measurement setup on the prediction performance. This study investigates the geometrical effect with three parameters including the effect of different parts of pineapple on the diffuse reflectance, relationship between diffuse reflectance and soluble solids content (SSC), and effect of measurement position on the calibration model. The measurement setup was investigated through pre- and post-dispersive (with fiber optic design) NIRS technique. Three parameters were studied with pre-dispersive sensor. First, the effect of acquired difference reflectance from different parts of pineapple i.e. top, middle, and bottom was investigated with boxplot technique. Then, the relationship between the diffuse reflectance and SSC was evaluated with correlation plot. Lastly, nine independent artificial neural networks were separately trained to investigate the geometrical effects on different parts of pineapple. Results show that the concave surface of top and bottom parts of pineapples would affect the reflectance of light and deteriorate the prediction performance. With bifurcated fiber optic design, the predictive model of middle part of pineapples achieved the best performance i.e. root mean square error of prediction and correlation coefficient of prediction of 1.313 °Brix and 0.7408 respectively. The main finding of the research is that the geometrical effect that affects the Brix prediction can be minimized by proper measurement setup. 2021-05 Thesis http://eprints.uthm.edu.my/8264/ http://eprints.uthm.edu.my/8264/1/24p%20HONG%20FAN%20WEI.pdf text en public http://eprints.uthm.edu.my/8264/2/HONG%20FAN%20WEI%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/8264/3/HONG%20FAN%20WEI%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Elektrik dan Elektronik
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	T Technology (General)
spellingShingle	T Technology (General) Hong, Fan Wei Near infrared diffuse reflectance measurement set-up in non-destructive brix measurement for intact pineapples
description	Conventional Brix prediction of pineapple is time-consuming and destructively. Even few of the applications of near infrared spectroscopy in diffuse reflection mode had been implemented in determining the Brix of pineapple, those applications did not investigate the effect of pineapple surface (geometrical effect) and the measurement setup on the prediction performance. This study investigates the geometrical effect with three parameters including the effect of different parts of pineapple on the diffuse reflectance, relationship between diffuse reflectance and soluble solids content (SSC), and effect of measurement position on the calibration model. The measurement setup was investigated through pre- and post-dispersive (with fiber optic design) NIRS technique. Three parameters were studied with pre-dispersive sensor. First, the effect of acquired difference reflectance from different parts of pineapple i.e. top, middle, and bottom was investigated with boxplot technique. Then, the relationship between the diffuse reflectance and SSC was evaluated with correlation plot. Lastly, nine independent artificial neural networks were separately trained to investigate the geometrical effects on different parts of pineapple. Results show that the concave surface of top and bottom parts of pineapples would affect the reflectance of light and deteriorate the prediction performance. With bifurcated fiber optic design, the predictive model of middle part of pineapples achieved the best performance i.e. root mean square error of prediction and correlation coefficient of prediction of 1.313 °Brix and 0.7408 respectively. The main finding of the research is that the geometrical effect that affects the Brix prediction can be minimized by proper measurement setup.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Hong, Fan Wei
author_facet	Hong, Fan Wei
author_sort	Hong, Fan Wei
title	Near infrared diffuse reflectance measurement set-up in non-destructive brix measurement for intact pineapples
title_short	Near infrared diffuse reflectance measurement set-up in non-destructive brix measurement for intact pineapples
title_full	Near infrared diffuse reflectance measurement set-up in non-destructive brix measurement for intact pineapples
title_fullStr	Near infrared diffuse reflectance measurement set-up in non-destructive brix measurement for intact pineapples
title_full_unstemmed	Near infrared diffuse reflectance measurement set-up in non-destructive brix measurement for intact pineapples
title_sort	near infrared diffuse reflectance measurement set-up in non-destructive brix measurement for intact pineapples
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Kejuruteraan Elektrik dan Elektronik
publishDate	2021
url	http://eprints.uthm.edu.my/8264/1/24p%20HONG%20FAN%20WEI.pdf http://eprints.uthm.edu.my/8264/2/HONG%20FAN%20WEI%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/8264/3/HONG%20FAN%20WEI%20WATERMARK.pdf
_version_	1776103313868062720

Near infrared diffuse reflectance measurement set-up in non-destructive brix measurement for intact pineapples

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