discussion / Biologging  / 16 June 2022

Virtual fencing / Kinetic energy harvesting / Holistic grazing

Hi everyone, Stephanie invited me to share some recent developments in Finalnd.

I'm David and I'm a mechanical engineer from Rijeka, Croatia, working as a Marie Curie postdoc at Tampere University, Finland, developing kinetic energy harvesters for terrestrial animals, specifically in this project - goats and cattle.

I've been also collaborating with Nofence the commercial pioneers of the breakthrough virtual fencing technology.

This is my c/p of  a post I shared yesterday on my LinkedIn profile. Let me know what you think!

Kind reagrds,


Take a look at the first virtual fencing Nofence collar in Finland! Breakthrough future grazing technology developed by Nofence and Oscar Hovde now finally applied, tested and analyzed in cooperation with Tampere University and holistic grazing expert and consultant Philipp Mayer @ the Mantereen Tila highland cattle farm. After my visit to Nofence in November we agreed to test one collar here in Finland so I could measure how the collar moves on the animal and analyze afterwards what are the main directions of acceleration which could be employed for the development of kinetic energy harvesters for future enhancing of Nofence's technology. Also Philipp would use the collar to test the use of the collar in his dynamic holistic pasture management strategies. In the first photo you can see the accelerometer mounted on the bottom of the collar (24h, 800Hz, +/- 16g's), and on the second the equipped collar on Meri. In the first map screenshot you can see the heat map of the collar in use where Meri overstepped virtual bounds set by Phillip. During this first day she received several sound warnings and subsequent electric shocks - while the second map shows the second day results where Meri stayed in bounds! She learned to associate the sound produced by the collar with the approaching virtual boundary! amazing technology! I'm keeping the acceleration results for me and Oscar ;)