Abstract
The flexibility of new age wireless networks and the variety of sensors to measure a high number of variables, lead to new scenarios where anything can be monitored by little electronic devices, thereby building Wireless Sensor Networks (WSN). Thanks to ZigBee, RFID or Wi-Fi networks the precise position of humans or animals as well as some biological parameters can be known in real-time. However, since wireless sensors must be attached to biological tissues and they are highly dispersive, propagation of the electromagnetic waves must be studied to build an efficient and well-working network. In this work, the radio wave propagation produced by ZigBee devices working over ISM 2.4GHz based network is studied through a home-made 3D Ray Launching simulation tool. Furthermore, a simplified dog model is developed for the chosen simulation code, considering not only its morphology but also its dielectric properties. This model is placed inside a home, taking under consideration all the furniture (tables, chairs, mirrors, etc.) and some measurements have been carried out attaching ZigBee based Xbee motes to a real dog. Power distribution, Power delay profile and delay spread graphs are extracted from simulation results concluding in an extensive and accurate wireless radio propagation studio. Finally, a dog monitoring system is presented, it works over the zigbee network and sends information to Android based devices.
Highlights
Nowadays, the monitoring of inanimate objects as well as of living beings can be carried out thanks to the high variety of sensors working together with increasingly smaller technology and the different wireless communication standards
For farm beasts or pets some identification systems have been extended, these systems are not based on wireless networks and owners must extract the information on approach
In [1,2] a farm is monitored thanks to wireless networks and in [3] the vital signs of a dog are wirelessly read, extracting information from photophethysmogram (PPG) and electrocardiogram (ECG). Notwithstanding, these kind of systems must be deployed after an extensive radio-planning study to construct a robust and efficient Wireless Sensor Network(WSN), especially when the number of animals is high, they are in wide areas or they are inside complex places from the electromagnetic point of view
Summary
The monitoring of inanimate objects as well as of living beings can be carried out thanks to the high variety of sensors working together with increasingly smaller technology and the different wireless communication standards. In [1,2] a farm is monitored thanks to wireless networks and in [3] the vital signs of a dog are wirelessly read, extracting information from photophethysmogram (PPG) and electrocardiogram (ECG). Notwithstanding, these kind of systems must be deployed after an extensive radio-planning study to construct a robust and efficient Wireless Sensor Network(WSN), especially when the number of animals is high, they are in wide areas or they are inside complex places from the electromagnetic point of view. An android based application for the studied scenario is presented
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