2024-03-28T11:18:50Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00019239
2022-12-14T04:01:00Z
1221:1222
Improvement in Sensitivity of an Inductive Oil Palm Fruit Sensor
Misron, Norhisam
Harun, Noor Hasmiza
Lee, Yeoh Kian
Sidek, Roslina Mohd
Aris, Ishak
Wakiwaka, Hiroyuki
Tashiro, Kunihisa
© 2014 by the authors; licensee MDPI, Basel, Switzerland This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license ( http://creativecommons.org/licenses/by/3.0/).
inductive
resonant frequency
air coil
oil palm
frequency characteristics
maturity classification
inductive concepts
Among palm oil millers, the ripeness of oil palm Fresh Fruit Bunch (FFB) is determined through visual inspection. To increase the productivity of the millers, many researchers have proposed with a new detection method to replace the conventional one. The sensitivity of such a sensor plays a crucial role in determining the effectiveness of the method. In our preliminary study a novel oil palm fruit sensor to detect the maturity of oil palm fruit bunches is proposed. The design of the proposed air coil sensor based on an inductive sensor is further investigated to improve its sensitivity. This paper investigates the results pertaining to the effects of the air coil structure of an oil palm fruit sensor, taking consideration of the used copper wire diameter ranging from 0.10 mm to 0.18 mm with 60 turns. The flat-type shape of air coil was used on twenty samples of fruitlets from two categories, namely ripe and unripe. Samples are tested with frequencies ranging from 20 Hz to 120 MHz. The sensitivity of the sensor between air to fruitlet samples increases as the coil diameter increases. As for the sensitivity differences between ripe and unripe samples, the 5 mm air coil length with the 0.12 mm coil diameter provides the highest percentage difference between samples and it is amongst the highest deviation value between samples. The result from this study is important to improve the sensitivity of the inductive oil palm fruit sensor mainly with regards to the design of the air coil structure. The efficiency of the sensor to determine the maturity of the oil palm FFB and the ripening process of the fruitlet could further be enhanced.
Article
SENSORS. 14(2):2431-2448 (2014)
MDPI AG
2014-02
eng
journal article
VoR
http://hdl.handle.net/10091/00020001
https://soar-ir.repo.nii.ac.jp/records/19239
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?CMD=search&DB=pubmed&term=24496313
24496313
https://doi.org/10.3390/s140202431
10.3390/s140202431
1424-8220
SENSORS
14
2
2431
2448
https://soar-ir.repo.nii.ac.jp/record/19239/files/sensors-14-02431.pdf
application/pdf
692.0 kB
2017-10-06