Implementation and Verification of a Low-Power UHF/LF Wireless Sensor Network as Part of the Intelligent Container

In this paper a new Low-Power UHF/LF Sensor System for the use in a container environment is presented. The aim is the dynamic and precise monitoring of physical parameters to minimize the loss of perishable food during transportation. Next to common UHF based Wireless Sensor Nodes [1] an LF interface is added that is able to wake up dedicated Sensor Nodes and request particular sensor values. A basestation is used to handle the communication and monitor the acquired sensor data. The whole system is adapted to the specific needs of transportation and is integrated in a 40 feet refrigerated container and long term measurements are taken to verify the proposed concept.