System Design of Durian Maturity Determination using Microstrip Patch Antennas

Kittiamornkul, Navapadol; Jiraseriamornkul, K.; Chamnongthai, Kosin; Krairiksh, M.; Higuchi, Kohji

doi:10.1109/sice.2007.4421480

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…The algorithms are based on identifying, empirically, correlations between the dielectric properties and the partial densities of water and dry matter of a given material. Kittiamornkul et al [68] proposed a system design of Durian maturity determination using microstrip patch antennas. The system based on microwave transmission flexibly measured maturity in free space.…”

Section: Introductionmentioning

confidence: 99%

A Design Method for a Microwave-Based Moisture Sensing System for Granular Materials in Arbitrarily Shaped Containers

2021

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To estimate the moisture in an entire arbitrarily shaped workpiece, an automatic system should continuously sense moisture at all points of the workpiece. This paper proposes a design method for a microwavebased moisture sensing system for granular materials in arbitrarily shaped containers based on scanning in a moisture sensing box. The size of the moisture sensing box is first determined as the maximum size of any granular material containers based on initial user requirements. The moisture sensing system physically consists of a pair of antennas for microwave transmission and reception and a pair of distance sensors scanning throughout the maximum scanning range of the moisture sensing box to find the attenuation and workpiece thickness at all points of the workpiece, and these sensed microwave attenuations and workpiece thickness measurements are then used to calculate the moisture at all points of the workpiece. The average moisture of all points is finally taken as the estimated moisture of the whole workpiece.To evaluate the performance of the proposed system, experiments have been performed with granular materials in containers of various shapes, and the estimation results show the proposed method of continuous moisture scanning of a workpiece can improve 7.77% approximately compared with the antenna array approach.

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Section: Introductionmentioning

confidence: 99%

A Design Method for a Microwave-Based Moisture Sensing System for Granular Materials in Arbitrarily Shaped Containers

2021

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Nondestructive maturity classification of durian based on fractal features

Phothisonothai

2010

10th International Conference on Information Science, Signal Processing and Their Applications (ISSPA 2010)

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This paper proposes a classification method to determine maturity levels of durian by using fractal analysis. We used the automatic knocking machine to knock the durian in which the knocked-sound was analyzed in terms of fractal concepts, and the fractal dimension (FD) values to be pre sented as a feature. The fractal algorithm, namely, Higu chi's method was selected to evaluate FD of the knocked sound. To show the FD changes in waveform with respect to the time, the time-dependent FD (TDFD) was proposed. Probability distribution of TDFDs indicates that the rela tionship of immaturity and maturity levels of durian has proven that the FD-based features can be employed. The proposed method achieves an average accuracy rate of 89.94% and 88.20% for the Montong durians weighing 3.5-4.0 kg and 4.0--4.5 kg, respectively. The experimental re sults show that the FD is capable of classifying maturity levels of durian effectively.Index Terms-Nondestructive method, durian maturity, fractal dimension, acoustic sound processing.

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System Design of Durian Maturity Determination using Microstrip Patch Antennas

Cited by 2 publications

References 7 publications

A Design Method for a Microwave-Based Moisture Sensing System for Granular Materials in Arbitrarily Shaped Containers

A Design Method for a Microwave-Based Moisture Sensing System for Granular Materials in Arbitrarily Shaped Containers

Nondestructive maturity classification of durian based on fractal features

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