IMPLEMENTATION OF LOW-POWER WIRELESS SENSOR NETWORK PROTOCOL STACK FOR REAL-TIME MONITORING OF WAREHOUSES

With recent advances in technical standards of wireless sensor networks (WSNs) and semiconductor manufacturing technology, WSNs are used for large-scale industrial applications, especially for real-time monitoring of warehouses containing grains, medicines, tobaccos, and other products. To satisfy, these application demands while maintaining critical support for low-energy operation, a multiprocessor node hardware platform and a WSNs protocol stack based on IEEE 802.15.4 was proposed and developed Our design is characterized with low-power and rapid self-organization; and can enable the sensor nodes to awaken on radio (WOR) or wake themselves on time, the router nodes to sleep, and the gateway node to control the sensor nodes in real time. The protocol stack and hardware platform are compatible with commercial WSNs real time monitoring for a broad class of applications with low cost. One system with 4 gateway nodes and 85 sensor nodes has been successfully applied in warehouses of tobacco-alcoholization process storage in Chengdu since 15 January 2014. The almost full year-long test results indicated that networks could be established rapidly and the system could run stably with good scalability and high energy saving.