Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-26T13:28:30.024Z Has data issue: false hasContentIssue false
  • English
  • Français

Evaluation of the use of an artificial teat to measure the forces applied by a milking machine teatcup liner

Published online by Cambridge University Press:  01 June 2009

Nicholas J. D. Adley  and
M. Clare Butler
Nicholas J. D. Adley
Affiliation:
Silsoe Research Institute, Wrest Park, Silsoe MK45 4HS, UK
M. Clare Butler
Affiliation:
Silsoe Research Institute, Wrest Park, Silsoe MK45 4HS, UK
Get access Rights & Permissions [Opens in a new window]

Summary

An artificial teat containing a force transducer was constructed to study the forces exerted by the liner on the teat during milking. The objective was to develop a method of comparing the action of different liners under a variety of different milking conditions. The rigid structure of the artificial teat did not provide an accurate representation of a real teat but deformable models used in the past have not proved practical. Initial tests of the teat showed that it gave repeatable results during calibration. When placed in a liner, however, repeatable results could not be obtained if the teat–liner interface was disturbed. The forces that were measured under simulated milking conditions varied with liner wall position and with time. There was a peak and trough prior to a stable asymptotie value being attained and a noticeable time lag behind pulsation chamber pressure. This technique can be used to compare liners when a reliable method of locating the artificial teat within the liner has been developed.

Type
Original articles
Information
Journal of Dairy Research , Volume 61 , Issue 4 , November 1994 , pp. 467 - 472
Copyright
Copyright © Proprietors of Journal of Dairy Research 1994

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Butler, M. C. 1993 A mathematical model of the force exerted by the teatcup liner on the dairy cow's teat. Journal of Agricultural Engineering Research 54 211–217CrossRefGoogle Scholar
Butler, M. C. & Adley, N. J. D. 1994 Measurement of teatcup liner wall movement. Journal of Dairy Research 61 1–7CrossRefGoogle Scholar
Caruolo, E. V. 1983 Measuring force of massage produced by the teatcup liner. Journal of Dairy Science 66 2441–2445CrossRefGoogle Scholar
Gates, R. S. & Scott, N. R. 1986 Measurements of effective teat load during machine milking. Transactions of the ASAE 29 1124–1130Google Scholar
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 50 249–258CrossRefGoogle Scholar
Reitsma, S. Y., Cant, E. J., Grindal, R. J., Westgarth, D. R. & Bramley, A. J. 1981 Effect of duration of teatcup liner closure per pulsation cycle on bovine mastitis. Journal of Dairy Science 64 2240–2445CrossRefGoogle Scholar
R⊘nningen, O. 1992 A non-invasive method for measuring the compressive load on teats and the congestion of the teat ends during milking. Proceedings of the International Symposium on Prospects for Automatic Milking, Wageningen, Netherlands pp. 106–112. (EAAP publication no. 65)Google Scholar
Thiel, C. C. & Mein, G. A. 1977 The action of the cluster during milking. In Machine Milking, pp. 116–155 (Eds Thiel, C. C. and Dodd, F. H.). Reading: National Institute for Research in Dairying (NIRD-HRI Technical Bulletin no. 1)Google Scholar