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Mechanism

Operation

Drop-off Mechanism

Requirement

Description

LoRaWAN with LR1110

EU868 and US915

BLE connectivity

BLE

Sensors

Accelerometer

Belt

38mm

Weight

  • LoRa command to drop-off

  • Periodic status messages

100g

Length

<40mm

Thickness

<20mm

Attachment

as cat tracker

Testing

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Testing rig

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.

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Results

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).

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Additional impact tests and fatigue tests have to be performed to fully validate the strength of the drop-off mechanism.

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Wisent filed-test