SENSORY LIFE IN SENSORY WORLD

摘要

In the recent decades, sensors have affected on our life in various fields, including research activities, standardization procedures, and industrial Investments. Various types of sensors (e. g., pressure, temperature, and humidity) can be used in Wireless Sensor Networks (WSNs) to design and implement some of the important applications, such as environmental monitoring, healthcare systems, and military issues. WSNs consist of the low-power, large-scale, and low-cost sensor nodes. The nodes measure phenomena data (e.g., smoke density) to transmit the measured data to a center (e.g., sink or base station). Routing, security, and fault tolerance are some of the crucial challenges in sensor networks. This paper describes various physical features and key usages of the popular sensors. Furthermore, three WSNs applications in monitoring, healthcare, and military are considered subseauently. Since sensor localization and data mining are two important topics in WSNs, their categories and characteristics are addressed too. Evaluation results show the performance of sensor networks compared to radio-freauency identification (RFID) in terms of utilization, purpose, components, mobility, power supply, programmabllity, and deployment. Besides, some of the WSNs simulators are compared to each other in terms of computation time and memory usage.