Acceleration-sensor-based security system for orchards

A simple security system based on acceleration sensors for orchards is proposed to detect malicious picking activities by humans. The system reliably detects and accurately recognizes abnormal movements of tree branches. Experiments are conducted to verify its feasibility, especially its ability to discriminate normal movements, e.g. by wind, from abnormal ones. The results show that abnormal movements can be detected reliably if an adequate threshold is set. System considerations for realizing an actual system are also discussed.