Enhanced mobile node design for small size animal borne wireless sensor nodes with encounter detection and localization

In this paper an enhanced version of the mobile node developed in the BATS project for small sized animals like bats is proposed. The new design uses highly integrated components and a more compact design. In the paper the new design is described with focus on the conducted changes. The new design has been proven in field test in Germany from which first results are shown. Special focus is put on the power supply and mobile node runtime. For pure encounter detection a runtime of more than 420 hours has been recorded. Without any communication with other nodes the current is as little as 50 μA while still being in active mode.