3. Hardware design
Wireless and battery operated sensors (door contact, photocell) are used to detect when a specific container is opened. Each sensor is identified (in the YardProtect software) by the ID of the container it’s installed on.
A 360 camera with edge storage is installed and integrated with Video Management Software (VMS) to provide a video playback with 360 coverage. This solution is optimized to use limited cellular bandwidth by recording videos locally on the camera and transferring them only on demand.
3.3 Wireless mesh network
A ZigBee network is used for sensor communication because it provides a wide-range mesh radio coverage with efficient power consumption.
The ZigBee network is connected to the shipping company backend using a cellular modem which transfers sensor messages via 3G/4G cellular network.
As the container makes its journey from one yard to another, the attached sensor automatically connects to the next gateway and becomes part of the new yard’s security system.