Detecting sour skin infected onions using a customized gas sensor array

Tharun Konduru, Glen Christopher Rains, Changying Li

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The overall goal of this study was to test a customized gas sensor array in its ability to detect an important postharvest disease (sour skin) in onions. The sensor array consists of seven metal oxide semiconductor gas sensors and a microcontroller-based automatic data logging system. Three features were extracted from the sensor responses and three baseline correction methods were employed to correct the sensors' responses. The gas sensor array was tested in two separate experiments with two treatments (control and sour skin). The multivariate data analysis revealed that the "relative response" feature combined with relative baseline correction method provided the best discrimination of infected onions among healthy ones. The best performance (85%) was achieved by using the support vector machine model when the data collected from an independent experiment were used for validation. The study demonstrated the potential of a gas sensor array to detect sour skin-infected onions placed among healthy onions in storage.

Original languageEnglish
Pages (from-to)19-27
Number of pages9
JournalJournal of Food Engineering
Volume160
DOIs
Publication statusPublished - Sep 1 2015

Fingerprint

Onions
onions
sensors (equipment)
Gases
gases
Skin
Semiconductors
Skin Diseases
Information Systems
Oxides
Multivariate Analysis
semiconductors
Metals
postharvest diseases
logging
multivariate analysis
oxides
metals
methodology

All Science Journal Classification (ASJC) codes

  • Food Science

Cite this

Detecting sour skin infected onions using a customized gas sensor array. / Konduru, Tharun; Rains, Glen Christopher; Li, Changying.

In: Journal of Food Engineering, Vol. 160, 01.09.2015, p. 19-27.

Research output: Contribution to journalArticle

Konduru, Tharun ; Rains, Glen Christopher ; Li, Changying. / Detecting sour skin infected onions using a customized gas sensor array. In: Journal of Food Engineering. 2015 ; Vol. 160. pp. 19-27.
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