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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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spelling my.uthm.eprints.82642023-02-07T03:42:10Z http://eprints.uthm.edu.my/8264/ Near infrared diffuse reflectance measurement set-up in non-destructive brix measurement for intact pineapples 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 NonPeerReviewed text en http://eprints.uthm.edu.my/8264/1/24p%20HONG%20FAN%20WEI.pdf text en http://eprints.uthm.edu.my/8264/2/HONG%20FAN%20WEI%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/8264/3/HONG%20FAN%20WEI%20WATERMARK.pdf Hong, Fan Wei (2021) Near infrared diffuse reflectance measurement set-up in non-destructive brix measurement for intact pineapples. Masters thesis, Universiti Tun Hussein Onn Malaysia.
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
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
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
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
http://eprints.uthm.edu.my/8264/
_version_ 1758580264292843520
score 13.211869

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