Effect of orientation on the fruit on-line size determination performed by an optical ring sensor

Moreda, G.P.; Ortiz-Cañavate, J.; García-Ramos, F. Javier; Ruiz-Altisent, Margarita

doi:10.1016/j.jfoodeng.2006.11.013

Cited by 10 publications

(5 citation statements)

References 9 publications

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“…Moreda et al (2005) determined optimal levels of speed and passage zone for an on-line size determination system comprising an optical ring sensor and a singulator made of two angled belts. In a subsequent work, Moreda et al (2007), working on tomato and kiwifruit, analyzed the effect of fruit orientation on the precision of measurements obtained using the optical ring sensor. Controlled vs random orientations were compared.…”

Section: Systems Based On Measuring the Volume Of The Gap Between Thementioning

confidence: 99%

Non-destructive technologies for fruit and vegetable size determination – A review

Moreda

Ortiz-Cañavate

García-Ramos

et al. 2009

Journal of Food Engineering

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138

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Here, we review different methods for non-destructive horticultural produce size determination, focusing on electronic technologies capable of measuring fruit volume.The usefulness of produce size estimation is justified and a comprehensive classification system of the existing electronic techniques to determine dimensional size is proposed.The different systems identified are compared in terms of their versatility, precision and throughput. There is general agreement in considering that online measurement of axes, perimeter and projected area has now been achieved. Nevertheless, rapid and accurate volume determination of irregular-shaped produce, as needed for density sorting, has only become available in the past few years. An important application of density measurement is soluble solids content (SSC) sorting. If the range of SSC in the batch is narrow and a large number of classes are desired, accurate volume determination becomes important. A good alternative for fruit three-dimensional surface reconstruction, from which volume and surface area can be computed, is the combination of height profiles from a range sensor with a two-dimensional object image boundary from a solid-state camera (brightness image) or from the range sensor itself (intensity image). However, one of the most promising technologies in this field is 3-D multispectral scanning, which combines multispectral data with 3-D surface reconstruction.

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Section: Systems Based On Measuring the Volume Of The Gap Between Thementioning

confidence: 99%

Non-destructive technologies for fruit and vegetable size determination – A review

Moreda

Ortiz-Cañavate

García-Ramos

et al. 2009

Journal of Food Engineering

Self Cite

138

View full text Add to dashboard Cite

show abstract

“…This method stays in the theoretical research stage and is rarely used in the actual production. Another method is to use the orientation righting device which fits the inherent geometry structure of the fruit (Li, Ma, Cheng, Chen, & Qing, 2014; Moreda, Ortiz‐Cañavate, Garcia‐Ramos, & Ruiz‐Altisent, 2007; Wang, Liang, Min, Liu, & Wang, 2012). This kind of orientation righting device has the high efficiency and can achieve the mass production, but the centering time is long, the structure of the whole machine is complex and the maintenance cost is high in the later stage.…”

Section: Introductionmentioning

confidence: 99%

Design and experimental research of haw core removal machine based on buoyancy orientation mechanism

Xie

et al. 2020

J Food Process Engineering

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In order to solve the problems of the labor cost and the low mechanization level in the intensive processing of the haw products, a haw core removal machine based on the buoyancy orientation was designed, which solved the two key technical problems including the oriented conveying and the core removal in its coring process. The effects of different cutting edge structures on the force on the pulp and the shape of the final pulp were studied, and the effects of the haw's own shape and the medium flow velocity on the orientation righting rate were analyzed. The results showed that the ratio of height to diameter had a direct effect on the orientation righting rate of hawthorn, and the two unstable equilibrium points could be improved by increasing the flow velocity of the medium. The prototype experiment showed that the buoyancy oriented conveying was a feasible and effective method in the processing of the small‐scale fruit with the uniaxial symmetry such as the haw. In the same scale of the haw core removal processing, its production capacity could be increased by about 30%. The research results provided a basis for the follow‐up improvement of the automatic haw core removal machine. Practical applications The traditional haw deep processing enterprises mostly use manual or semi‐automatic equipment for the haw core removal, which greatly restricts the production efficiency of enterprises. The present study provides an automatic haw core removal processing equipment based on the buoyancy orientation mechanism and gives the optimal cutting edge structure. The experimental results show that the main factors affecting the haw orientation and centering are the shape of the haw and the flow velocity. Furthermore, on the basis of orthogonal experiment, the process parameter surface of the orientation righting rate is established, which can provide reference for the subsequent design of the haw core removal machine and the optimization of the process parameters in the production process.

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“…However, the majority of these fruit-grading systems for tomatoes is often cumbersome, only available for off-vine fruit measurement, and cannot be used for in situ measurement of on-vine tomato fruits. With the development of image sensing and processing techniques, the measurement of fruit size could be conducted based on machine-vision technique [1,[10][11][12]. One method for size measurement of fruits was to use the area occupying fruit and an equivalent circle diameter after binarization based on the color information [13].…”

Section: Introductionmentioning

confidence: 99%

“…Performance of best PLS models built individually for cultivars 1, 2, 3 and for mixed spectra collected from across the whole growing stages Although it is successful to establish models for tomato size prediction using PLSR models, the prediction accuracy is still low. Table 2 also shows large number of LVs(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) needed to establish PLSR models. These high dimensional data structures may not be dealt well with linear calibration methods like PLSR.…”

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confidence: 99%

Size Estimation of Tomato Fruits Based on Spectroscopic Analysis

Yang

Kuang

Mouazen

2011

AMR

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This study used visible and near-infrared (VIS-NIR) spectroscopy for size estimation of tomato fruits of three cultivars. A mobile, fibre-type, VIS-NIR spectrophotometer (AgroSpec, Tec 5, Germany) with spectral range of 350-2200 nm, was used to measure reflectance spectra of on-vine tomatoes growing from July to September 2010. Spectra were divided into a calibration set (75%) and an independent validation set (25%). A partial least squares regression (PLSR) with leave-one-out cross validation was adopted to establish calibration models between fruit diameter and spectra. Furthermore, the latent variables (LVs) obtained from PLS regression was used as input to back-propagation artificial neural network (BPANN) analysis. Result shows that the prediction of PLSR model can produce good performance with coefficient of determination (R2) of 0.82, root-mean-square error of prediction (RMSEP) of 4.87 mm and residual prediction deviation (RPD) of 2.35. Compared to the PLSR model, the PLS-BPANN model provides considerably higher prediction performance withR2of 0.88, RMSEP of 3.98 mm and RPD of 2.89. It is concluded that VIS-NIR spectroscopy coupled with PLS-BPANN can be adopted successfully for size estimation of tomato fruits.

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Effect of orientation on the fruit on-line size determination performed by an optical ring sensor

Cited by 10 publications

References 9 publications

Non-destructive technologies for fruit and vegetable size determination – A review

Non-destructive technologies for fruit and vegetable size determination – A review

Design and experimental research of haw core removal machine based on buoyancy orientation mechanism

Size Estimation of Tomato Fruits Based on Spectroscopic Analysis

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