Sensor (detector) is a device that measures a physical quantity and converts it into a signal which can be read by an observer or by an instrument.
A wireless sensor network (WSN) typically consists of a large number of low-cost, low- power, and multifunctional sensor nodes that are deployed in a region of interest. These nodes organized into a cooperative network.
Wireless Sensor networks do not rely on any hard-wired communication links; therefore, they can be deployed in places without
any existing infrastructure
Wireless Sensor networks are being used in increasingly diverse applications areas, largely because of their diversity, such as visual, thermal, seismic, acoustic, and magnetic, that can sense (monitor) temperature, noise, physical movement of objects, radioactivity, pressure (air or fluid), and speed.
Each node consists of processing capability (one or more microcontrollers, CPUs or DSP chips), may contain multiple types of memory (program, data and flash memories), have a RF transceiver (usually with a single omni- directional antenna), have a power source (e.g., batteries and solar cells), and accommodate various sensors and actuators
Wireless Sensor Networks (WSNs) are a family of wireless networks which are currently deployed in our daily living environment to achieve different sensing activities with the objective of delivering services to both civil and military applications..
WSN enables different applications such as battlefield surveillance and enemy tracking, habitat monitoring and environment observation.
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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