We have used the drop-off enclosure with flat steel plates for testing. Additional holder was assembled to support the weights. Several steel and aluminium weights were used for gradually applying load during testing.
We have preformed two tests to determine and validate the strength of the drop-off mechanism. In both tests the mechanism broke when subjected to load of approx. 300 N (31,9 kg of weights including the holder).
Additional impact tests and fatigue tests have to be performed to fully validate the strength of the drop-off mechanism.
LoRa command to drop-off
Periodic status messages
Requirement
Description
LoRaWAN with LR1110
EU868 and US915
BLE connectivity
BLE
Sensors
Accelerometer
Belt
38mm
Weight
100g
Length
<40mm
Thickness
<20mm
Attachment
as cat tracker