Study on forecast method for watermelon growth period based on vibration

doi:10.3969/j.issn.1004-1524.2016.11.21

›› 2016, Vol. 28 ›› Issue (11): 1941-1946.DOI: 10.3969/j.issn.1004-1524.2016.11.21

• Biosystem Engineering • Previous Articles Next Articles

Study on forecast method for watermelon growth period based on vibration

WANG Di-song^{1, 2}, LI Zhen-feng1^{1, 2, *}, PU Hong-jie^{1, 2}, LU Yong^{1, 2}

1.School of Mechanical Engineering, Jiangnan University, Wuxi 214000, China;
2. Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Wuxi 214000, China

Received:2016-04-01 Online:2016-11-15 Published:2016-11-16

Abstract

Abstract: The study was conducted by knocking on watermelon for its’ vibration test with self-designed vibration test system, from which the frequency response function(FRF) of watermelon was obtained. The prediction mathematical model of watermelon’s growth period was established by using the first response frequency(f₁), the second response frequency(f₂) and the third response frequency(f₃) of FRF, respectively. The determination coefficients R² of the three models were high. All the f₁, f₂ and f₃ response frequency were selected to establish multivariate nonlinear regression model which could predict watermelon’s growth period. The determination coefficient R² of the model could reach 0.830, the root mean square error RMSE decreased to 2.095. The establishment of the model provides a theoretical reference for the on-line nondestructive testing of watermelon’s growth period.

Key words: vibration testing, watermelon, growth period, multivariate nonlinear regression

CLC Number:

S651

WANG Di-song, LI Zhen-feng1, PU Hong-jie, LU Yong. Study on forecast method for watermelon growth period based on vibration[J]. , 2016, 28(11): 1941-1946.

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Study on forecast method for watermelon growth period based on vibration

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