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Sensor is a converter that measures a physical quantity and converts it into a signal which can be read by an observer or by an (today mostly electronic) instrument. Sensors are used in everyday objects such as touch-sensitive elevator buttons (tactile sensor) and lamps which dim or brighten by touching the base. There are also innumerable applications for sensors of which most people are never aware. The most widely used sensors measure temperature, pressure or flow.
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Scope and Importance
Firefighters scatter wireless sensors throughout a burning building to map hot spots and flare-ups. Simultaneously, the sensors provide an emergency communications network. Miniature chemical and biological sensors in hospitals, post offices, and transportation centers raise an alarm at the first sign of anthrax, smallpox or other terror agents. Networks of wireless humidity sensors monitor fire danger in remote forests. Nitrate sensors detect industrial and agricultural runoff in rivers, streams and wells, while distributed seismic monitors provide an early warning system for earthquakes. Meanwhile built-in stress sensors report on the structural integrity of bridges, buildings and roadways, and other man-made structures.
Applications include manufacturing and machinery, airplanes and aerospace, cars, medicine and robotics. A sensor is a device, which responds to an input quantity by generating a functionally related output usually in the form of an electrical or optical signal.
A sensor's sensitivity indicates how much the sensor's output changes when the measured quantity changes. For instance, if the mercury in a thermometer moves 1 cm when the temperature changes by 1 °C, the sensitivity is 1 cm/°C (it is basically the slope Dy/Dx assuming a linear characteristic).
Sensors that measure very small changes must have very high sensitivities. Sensors also have an impact on what they measure; for instance, a room temperature thermometer inserted into a hot cup of liquid cools the liquid while the liquid heats the thermometer.
Sensors need to be designed to have a small effect on what is measured; making the sensor smaller often improves this and may introduce other advantages. Technological progress allows more and more sensors to be manufactured on a microscopic scale as micro sensors using MEMS technology. In most cases, a micro sensor reaches a significantly higher speed and sensitivity compared with macroscopic approaches.
Historically, sensing technologies and sensing platforms have played a major role for enabling new applications and experiences in pervasive computing and wireless sensing networks.
The global market for sensors was valued at $79.5 billion in 2013 and is expected to increase to $86.3 billion in 2014, $95.3 billion in 2015, and to nearly $154.4 billion by 2020, a compound annual growth rate (CAGR) of 10.1% over the five-year period from 2015 through 2020.
International symposium and workshops
1.2nd Sensors Application Development Workshop
2.4th International Sensor Science Symposium
3.IEEE International Symposium on Robotics and Intelligent Sensors
4.Pre-symposium Indo-Japanese Workshop on Sensing Mechanisms, Materials. & Applications
1.4th Biosensors and Bioelectronics Conference
September 28-30, 2015 Atlanta USA
2.5th Euro Biosensors and Bioelectronics Conference
June 30-July 02, 2016 Valencia Spain
3.ASUC 2015: Sixth International Conference on Ad hoc, sensor & Ubiquitous Computing
November 06-07 2015, Dubai UAE
List of Societies & Associations
8.OSA THE OPTICAL SOCIETY
List of Companies
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This page was last updated on November 25, 2020