Design And Implementation Of A Wearable Wireless Positioning Wristband

Nowadays according to the increasingly problem of security monitoring, it becomes increasingly intense for personal safety supervision and real-time tracing in the personal safety,property or information security. So the wearable monitoring device has offered a new solution for the security monitoring system. This paper analyzes the need of security monitoring, and a new type of wearable wireless positioning wristband is proposed to be used in the existing security monitoring system. This system includes four parts: personnel information acquisition subsystem and wireless data transmission subsystem. Combining with this two terminal device,it is designed like a strap wearing on the wrist. What’s more, using the positioning algorithm based on RSSI, the security monitoring system can display status information and real-time personnel position.The system established a more comprehensive security monitoring mechanism. The main researches content are as follows:(1) Based on the study of existing ways about wearable monitoring devices, a personnel information acquisition subsystem is proposed. It includes three sections: the RFID tags, the electronic wristbands for anti-off pick and the physiological data acquisition. All the sections can independently and automatically process, compute, identifies and monitor personnel information. Importantly, if someone does the unusual circumstances, the subsystem can be designed to solve the corresponding early warning program and the quickly record identifying.(2) A ZigBee wireless transmission apparatus is designed through the wireless sensor networks. It includes a peripheral circuit and the RF circuit. On the software hand, it choices the suitable topology and network protocol. At last, the papers defines the data frame format.For unusual circumstances, the paper establishes an anomalous table.(3) For the supervision of the security environment in the region, this paper improves positioning algorithm based on RSSI, ranging optimization model based on the received signalstrength indication and improving positioning algorithm based on trilateration. By the received signal strength values, it can calculate personnel coordinates in the region, so that the security monitoring system can more quickly and accurately track personnel positioning, and display in the security monitoring system interface.The testing results show that, the wearable wireless positioning wristband can effectively monitor the person identity information and real-time positioning tracking in the region with a low communication fail rate and a quickly warned response, which reaches the design target.