Research On The Wireless ZigBee Monitoring Network System For Smart Clothing

In recent years, with increasingly serious natural disasters, smart clothing employed forwild rescue has obtained more and more people’s attention. However, the developing direction ofthis category of smart clothing is mainly focused on exploring its structure and textile materials,while the development pace of the smart clothing which combines electronic informationtechnology and features of rescue clothing is relatively slow.After analyzing comprehensively the functional requirements for wild rescue clothing, thisthesis designed the wireless ZigBee real-time monitoring system geared to the needs of smartrescue clothing. The system overcomes the inconvenience caused by the heavy and clumpymonitoring equipments carried by rescuers, and adopts a variety of miniature smart sensorsembedded inside the clothes to real-timely monitor their surrounding environment and man’sbody movement changes. Bringing the low-powered ZigBee wireless network technology intothe communication architecture of smart clothing has effectively improved the condition of thetraditional wired data transmission.Based on the system requirements and research objectives, this thesis has completed thehardware circuit design as well as its software program development. Setting the low-powerZigBee system-on-chip (SOC) solution CC2530chip as the system processor, the peripheralcircuit design extends the poisonous gases acquisition module, temperature and humidityacquisition module, body acceleration acquisition module, LCD liquid crystal d isplay module,RS232serial communication module and ZigBee wireless communication modules, etc., so as toestablish a ZigBee wireless monitoring system hardware platform for smart rescue clothing. System software design can be divided from top to bottom into the application procedure,Z-Stack protocol stack and device drivers. The system sets Z-Stack protocol stack as its core, andrealizes various functions like the sensors signal acquisition, data processing, wirelesstransmission/reception, LCD driver and the host machine information display, etc.In theoretical research level, through detailed study on the Z-MAC protocols in wirelesssensor network and routing algorithms, this thesis proposed a hierarchical energy equalizationsub-cluster single-hop+multi-hop routing algorithm（LEACH_C）which is applied to smartclothing. It combined the multi-hop hierarchical routing algorithm and the multi-hop energybalance algorithm, effectively reducing the system’s network transmissionpower and meanwhileproviding some theoretical support for the development of smart clothing on the basis of wirelesssensor networks.Given the safety of rescuers, this thesis, based on three-axis acceleration sensors, has putforward a human body fall-down determination algorithm. It can judge whether a body fallsdown or not by measuring the change of the human body’s acceleration, and the correspondingexperiments have achieved excellently expected effect.