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Measurement of teatcup liner wall movement

  • M. Clare Butler (a1) and Nicholas J. D. Adley (a1)

Summary

A technique for monitoring the movement of the teatcup liner during milking, using video recordings, has been investigated. The liner was videoed through a transparent shell and the recordings were subsequently processed frame by frame by an image analyser. The width of the liner and its variation with pressure difference across the liner walls were calculated at several locations along the liner length, and analysis of these results allowed the pressures at which the liner buckled and the walls touched to be determined and some estimate of the degree and duration of liner collapse to be made.

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British Standards Institution 1988 Milking machine installations. London: British Standards Institution (BS 5545, parts 1 and 2)
Butler, M. C. & Hillerton, J. E. 1989 Methods of assessing teatcup liner performance. Journal of Agricultural Engineering Research 44 7786
Kamm, R. D. & Shapiro, A. H. 1979 Unsteady flow in a collapsible tube subjected to external pressure or body forces. Journal of Fluid Mechanics 95 178
Mein, G. A., Brown, M. R. & Williams, D. M. 1983 Pulsation failure as a consequence of milking with short teatcup liners. Journal of Dairy Research 50 249258
Reitsma, S. Y., Cant, E. J., Grindal, R. J., Westgarth, O. R. & Bramley, A. J. 1981 Effect of duration of teatcup liner closure per pulsation cycle on bovine mastitis. Journal of Dairy Science 64 22402245

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Measurement of teatcup liner wall movement

  • M. Clare Butler (a1) and Nicholas J. D. Adley (a1)

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