The 2009 CIGR International Symposium of the Australian Society for Engineering in Agriculture location:Brisbane - Queensland - Australia date:13-16 September 2009
This paper describes a synchronized system which is useful for automatic lameness detection in dairy cattle. The system consists of a pressure sensitive mat and two cameras. When a cow passes, the recording of the pressure mat is started. The mat sends a synchronization signal, which automatically triggers the cameras to start recording. When there is no activity on the pressure mat, a signal is send again to the camera system which stops the recording of the cameras. The recordings of the pressure mat and the cameras are saved together with (relative) timestamps so they can be combined afterwards.
The setup of this system provides us with synchronized data on the pressure distribution under the hoof of the cow in combination with images of the posture of the cow.
Experiments with this system were performed on ILVO farm in Ghent Belgium in October 2008 with 66 lactating Holstein cows while they passed a corridor after milking. The average synchronization error between the pressure mat and the camera was less than 16 ms tested on 30 recordings. It is assumed that synchronized data of pressure distribution and posture of cows increases the potential for early online and automatic lameness detection.