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Received: 2009-04-18

Revision Accepted: 2009-10-12

Crosschecked: 2009-11-03

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Journal of Zhejiang University SCIENCE B 2009 Vol.10 No.12 P.883-889


Firmness measurement of peach by impact force response

Author(s):  Yong-wei WANG, Jun WANG, Chong YAO, Qiu-jun LU

Affiliation(s):  Department of Biosystems Engineering, Zhejiang University, Hangzhou 310029, China

Corresponding email(s):   jwang@zju.edu.cn

Key Words:  Firmness, Peach, Impact force, Coefficient of restitution, Percentage of absorbed energy

Yong-wei WANG, Jun WANG, Chong YAO, Qiu-jun LU. Firmness measurement of peach by impact force response[J]. Journal of Zhejiang University Science B, 2009, 10(12): 883-889.

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author="Yong-wei WANG, Jun WANG, Chong YAO, Qiu-jun LU",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

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%T Firmness measurement of peach by impact force response
%A Yong-wei WANG
%A Chong YAO
%A Qiu-jun LU
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%I Zhejiang University Press & Springer
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T1 - Firmness measurement of peach by impact force response
A1 - Yong-wei WANG
A1 - Jun WANG
A1 - Chong YAO
A1 - Qiu-jun LU
J0 - Journal of Zhejiang University Science B
VL - 10
IS - 12
SP - 883
EP - 889
%@ 1673-1581
Y1 - 2009
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.B0920108

The impact force response of a peach impacting on a metal flat-surface was considered as nondestructive determination of firmness. The objectives were to analyze the effect of firmness, drop height, fruit mass, and impact orientation on the impact force parameters, and to establish a relationship between the impact force parameter and firmness. The effect of fruit firmness, drop height and fruit mass on the impact force parameters (coefficient of restitution, percentage of energy absorbed, and coefficient of force-time) was evaluated. The study found that the coefficient of restitution, percentage of energy absorbed, and force-time impact coefficient were significantly affected by fruit ripeness, but not affected by drop height, impact position (fruit cheek), and mass. The percentage of absorbed energy increased with ripeness, while the force-time impact coefficient and coefficient of restitution decreased with ripeness. Relationships were obtained between the three impact characteristic parameters (force-time impact coefficient, coefficient of restitution, and percentage of energy absorbed) and peach firmness using a polynomial model (R2=0.932), S model (R2=0.910), and exponential model (R2=0.941), respectively.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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