Detection of hollow pears by tree based modelling on non-destructive acoustic response spectra

Acta Horticulturae

Volumn 464, Issue , 1998, Pages 441-446

  Schrevens, E ^a   De Busscher, R ^a   Verstreken, E ^b   De Baerdemaeker, J ^b  

^a Department of Applied Plant Sciences ^*  (Belgium)

^b UNIVERSITY OF LEUVEN   (Belgium)

Author keywords

[No Author keywords available]

Indexed keywords

LYCOPERSICON ESCULENTUM; PYRUS;

EID: 10444274629     PISSN: 05677572     EISSN: None     Source Type: Book Series    
DOI: 10.17660/ActaHortic.1998.464.68     Document Type: Conference Paper

References (12)

1. Armstrong, P.R., Zapp, H.R. and Brown, G.K., 1990. Impulsive excitation of acoustic vibrations in apples for firmness determination. Trans. ASAE 33: 1353-1359.
2. Armstrong, P.R., Brown, G.K. and Abbot, J.A., 1992. Progress on an acoustic technique for estimating apple firmness. ASAE Paper No. 92-6050. St. Joseph, MI
3. Breiman, L., Friedman, J., Olshen, R. and Stone, C., 1984. Classification and Regression Trees. The Wadsworth Statistics, Probability series.
4. Chen, H. and De Baerdemaeker, J., 1990. Resonance frequency and firmness of tomatoes during ripening. Proceeding of the 22nd International Conference on Agricultural Mechanization. March 27-30, Zaragoza, Spain. Vol 1: 61-68.
5. Chen, P., Sun, Z. and Huang, L., 1992. Factors affecting acoustic responses of apples. Transactions of the ASAE 35: 1915-1920.
6. Chen, H., 1993. Analysis of the acoustic impulse resonance of apples for non-destructive estimation of fruit quality. PhD thesis. K.U. Leuven, Belgium.
7. De Baerdemaeker, J., 1988. The use of mechanical resonance measurements to determine fruit texture. Acta Hortic. 258: 331-339.
8. Herregods, M., 1992. Conservation et qualité des poires. Le fruit belge, 60: 175-187.
9. Titchmarsh, E.C., 1967. Convergence and summability. Introduction to the theory of Fourier Integrals. Oxford University Press. Pp. 1-24
10. Vandewalle, X., Langenakens, J. and De Baerdemaeker, J., 1994. Influence of global shape and internal structure of the tomato on the reliability of firmness estimation by acoustic impulse response technique. J. Agric. Eng. Res. (In Press).
11. Verreydt, J., Schrevens, E. and De Baerdemaeker, J., 1994. Comparison of destructive and non-destructive parameters measured on fruits. International symposium on 'Postharvest Physiology, Pathology and Technologies for Horticultural Commodities', Agadir, Morocco. Acta Hortic.. 8p.
12. Yamamoto, H., Iwamota, M. and Haginuma, S., 1980. Acoustic impulse response method for measuring natural frequency of intact fruits and preliminary applications to internal quality evaluations of apples and watermelons. J. of Text. Stud. 11: 117-136.