Abstract
Environment monitoring is essential to the perishable food supply chain management, since it provides important information to estimate the food quality and to predict its shelf life. In this work, a real-time perishable food supply chain monitoring system is developed based on ZigBee-standard wireless sensor network (WSN). Some important improvements including a configurable architecture for comprehensive sensors and an improved network switching scheme are designed to meet the application requirements. A tree-topology WSN system with 192 EndDevices and a star-topology WSN system with 80 EndDevices are implemented and evaluated in terms of both functions and performance. Test results show that the success rate of data communication is over 99%. Both theoretical analysis and realistic measurement results show that the EndDevices have a lifetime long enough for the application of supply chain monitoring.
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