Bruise susceptibility and energy dissipation analysis in pears under impact loading conditions

Stropek, Zbigniew; Gołacki, Krzysztof

doi:10.1016/j.postharvbio.2020.111120

Cited by 29 publications

(13 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Identifying the impact conditions which can cause bruising is essential to improve harvesting, handling, sorting, and transporting equipment and procedure [14]. Experiments to identify the impact have employed various devices designed to measure a specific impact and an amount of energy during impact on individual vegetables and fruit [15]. Two basic measuring techniques are the pendulum [16][17][18] and the drop test method [5][6][7]11,19].…”

Section: Introductionmentioning

confidence: 99%

Bruise Damage and Quality Changes in Impact-Bruised, Stored Tomatoes

Pathare

Al-Dairi

2021

Horticulturae

View full text Add to dashboard Cite

This study examined three main possible effects (impact, storage temperature, and duration) that cause and extend the level of bruising and other quality attributes contributing to the deterioration of tomatoes. The impact threshold level required to cause bruising was conducted by subjecting tomato samples to a steel ball with a known mass from different drop heights (20, 40, and 60 cm). The samples were then divided and stored at 10 and 22 °C for 10 days for the further analysis of bruise area and any physiological, chemical, and nutritional changes at two day intervals. Six prediction models were constructed for the bruised area and other quality attribute changes of the tomato. Storage time, bruise area, weight loss, redness, total color change, color index, total soluble solids, and pigments content (lycopene and carotenoids) showed a significant (p < 0.05) increase with the increase of drop height (impact level) and storage temperature. After 10 days of storage, high drop impact and storage at 22 °C generated a higher reduction in firmness, lightness, yellowness, and hue° (color purity). Additionally, regression model findings showed the significant effect of storage duration, storage temperature, and drop height on the measured variables (bruise area, weight loss, firmness, redness, total soluble solids, and lycopene) at a 5% probability level with a determination coefficient (R2) ranging from 0.76 to 0.95. Bruising and other quality attributes could be reduced by reducing the temperature during storage. This study can help tomato transporters, handlers, and suppliers to understand the mechanism of bruising occurrence and how to reduce it.

show abstract

Section: Introductionmentioning

confidence: 99%

Bruise Damage and Quality Changes in Impact-Bruised, Stored Tomatoes

Pathare

Al-Dairi

2021

Horticulturae

View full text Add to dashboard Cite

show abstract

“…Therefore, the impact energy (i.e., the kinetic energy) could be adjusted by changing the releasing angle of the pendulum arm. In the drop test, bruises could be generated by dropping the fruit to a contact surface [13], [23], [29]- [32] or by releasing a small steel ball to the fruit from a specific height [26], [33]- [36]. Because the impact energy computed as the potential energy that depends on the weight of the dropped object, a consistent impact level could be achieved for weight-varying apples by dropping a specific steel ball to the apples.…”

Section: Bruising Experiments Setupmentioning

confidence: 99%

Early detection of slight bruises in apples by cost-efficient near-infrared imaging

Nguyen

Lam

et al. 2022

IJECE

View full text Add to dashboard Cite

Near-infrared (NIR) spectroscopy has been widely reported for its useful applications in assessing internal fruit qualities. Motivated by apple consumption in the global market, this study aims to evaluate the possibility of applying NIR imaging to detect slight bruises in apple fruits. A simple optical setup was designed, and low-cost system components were used to promote the future development of practical and cost-efficient devices. To evaluate the effectiveness of the proposed approach, slight bruises were created by a mild impact with a comparably low impact energy of only 0.081 Joules. Experimental results showed that 100% of bruises in Jazz and Gala apples were accurately detected immediately after bruising and within 3 hours of storage. Thus, it is promising to develop customer devices to detect slight bruises for not only apple fruits but also other fruits with soft and thin skin at their early damage stages.

show abstract

“…Many studies have been carried out on the impact damage of various kinds of single stem fruits all over the world. The most common methods to determine impact loading damage are as follows: (1) drop tests [19][20][21][22][23]; (2) pendulum action, either by attaching a fruit to the pendulum [24,25] or by hitting the fruit with a pendulum tipped with a specific shape impactor [26,27]; (3) electronic fruit or impact recording devices [28][29][30]. However, the main problem with these methods is that vibrations make it difficult to accurately record force and deformation during impact due to shorter time periods to observe the mechanism.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Grape Cluster Vibration Signals during Transportation and Placing for Harvest and Post-Harvest Handling

et al. 2021

View full text Add to dashboard Cite

Berry dropping or shattering is an important factor during the harvest and post-harvest handling of fresh eating grapes until they reach the supermarkets. There are a lot of methods to measure post-harvest placing damage and the detachment force for single fruits. However, until now, there has been no objective method to observe and analyze the berry dropping mechanism of cluster fruits during robotic post-harvest handling. Therefore, in this paper, the effect of a cluster’s vibration on berry drop during vertical transportation and the impact of different packaging materials on fresh grape clusters during robotic placing were analyzed. For this purpose, a lead screw lathe, along with an attached actuator, three grape cluster samples (0.48, 0.50, 0.53 kg), three packaging materials (rigid plastic box, corrugated fiberboard box, expandable polystyrene box), four transportation speeds (0.4, 0.6, 0.8, 1.0 m/s), and four acceleration excitations (6, 8, 10, 12 m/s2) that were given in a mechanical system (actuator) were studied. In order to analyze the berry drop mechanism of grape clusters before and after the impact with packaging material, a force sensor and high-speed video camera were used. It was concluded from the vertical transportation test that with the increase in speed and acceleration excitations, the change in hanging force increased positively (R2 = 0.92). Additionally, the force after the striking of the grape cluster with packaging materials decreased negatively (R2 = 0.97), and the corresponding index of berry deflection increased. It was also observed from the high-speed camera images that rigid plastic boxes caused the maximum deflection of the grape berries, with the highest change in force of 8.6 N after the impact. Experimental results showed a negative correlation between the hanging force signals and the force after impact of the cluster, with a goodness of fit of R2 = 0.95 at different speeds. Overall, the proposed findings can be used as a reference study for improving robotic post-harvest handling, providing a useful visual and technical understanding of the berry fall susceptibility of cluster fruits, and can be used to develop a post-harvest robotic placing tool for avoiding berry drop damage on both industrial and farm levels.

show abstract

Bruise susceptibility and energy dissipation analysis in pears under impact loading conditions

Cited by 29 publications

References 48 publications

Bruise Damage and Quality Changes in Impact-Bruised, Stored Tomatoes

Bruise Damage and Quality Changes in Impact-Bruised, Stored Tomatoes

Early detection of slight bruises in apples by cost-efficient near-infrared imaging

Experimental Research on Grape Cluster Vibration Signals during Transportation and Placing for Harvest and Post-Harvest Handling

Contact Info

Product

Resources

About