Characteristics of a sensor are defined.
Sensors are defined by Piezoresistive,Optical(air path), Optical (fibre optic), Intrinsic, Extrinsic and Distributed sensors Piezoresistive sensors:- A Piezoresistive sensors is made from semiconductor material in which a p type region has been diffused into n type base.The resistance of this varies greatly when the sensor is compressed or streched. Optical sensors (air path):- Optical sensors are based on the modulation of light traveling between a light source and a light detector.These emit light in a narrow frequency band in the infrared region and are not affected by sunlight. Air path Optical are commonly used to measure proximity, translational motion,rotational motion and gas concentration. Optical sensors (fibre optic):- An alternative to using air as the transmission medium, optical sensors can use fibre optic cable instead to transmit light between a source and a detector. ...