Fiona Yeoh, Li Hsia (2006) Alat Penentu Kematangan Buah Berdasarkan Pantulan Gelombang Mikro. Project Report. Universiti Sains Malaysia, Pusat Pengajian Kejuruteraan Elektrik dan Elektronik. (Submitted)
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Abstract
There exists many ways to detect the ripeness of a fruit, but most of the time these methods are destructive, like for example, pressing the fruit or extracting the juice for chemical tests. The aim of this project is to develop a method to detect the degree of ripeness of a fruit without destroying it. This project is part of an ongoing effort carried out in USM. In this year's project, microwave signal will be used to detect the degree of ripeness of the fruit. Two axial mode helical antennas are used, one as the transmitter, and the other as the receiver. The transmitter will radiate the microwave signal towards the fruit, and the receiver will pick up the microwave signal that is reflected from the fruit. The strength of the reflected microwave signal will show how ripe the fruit is. This is because fruits with different degree of ripeness have different chemical (internal) composition and the reflection of microwave signal will depend on the chemical composition. So, it is expected that fruits with different degree of ripeness will reflect microwaves with different strength. The strength of the reflected microwave signal is also sampled at different instances using analogue-to-digital converters. Sampling is needed to obtain the transient response of the reflected microwave signal. The transient response pattern could also give information about the degree of fruit ripeness because, fruits with different degree of ripeness will reflect microwave signal with different transient response pattern. Bananas are used in this project. Two levels of banana ripeness is tested, ripe and unripe. The results obtained are analysed to determine the degree of ripeness of the bananas. The results do show some difference between ripe and unripe bananas, therefore the concept of using microwave reflection to detect the degree of fruit ripeness is feasible.
| Item Type: | Monograph (Project Report) |
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| Subjects: | T Technology T Technology > TK Electrical Engineering. Electronics. Nuclear Engineering |
| Divisions: | Kampus Kejuruteraan (Engineering Campus) > Pusat Pengajian Kejuruteraaan Elektrik & Elektronik (School of Electrical & Electronic Engineering) > Monograph |
| Depositing User: | Mr Engku Shahidil Engku Ab Rahman |
| Date Deposited: | 16 May 2023 09:19 |
| Last Modified: | 16 May 2023 09:19 |
| URI: | http://eprints.usm.my/id/eprint/58549 |
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