What is a sensor?

　　transducer (English name :transducer/sensor) is a front-end detection device, can feel the information of the measured object, and can feel the information, according to a certain law to transform into telecommunications/current signal or other signal form output we need, can meet the signal transmission, and then get the signal processing, display, record, storage, etc. Or control requirements. The definition of the sensor under the national standard GB7665-87 is: electronic components or devices that can feel the specified measured object and convert it into usable signals according to certain laws (mathematical function rules), usually composed of sensitive components and conversion components."

　　The characteristics of the sensor include: it is the main link to realize automatic detection and automatic control. The existence and development of sensors give the robot a sense of force, distance, Angle, touch, taste and smell, so that the robot slowly becomes like a real person. Usually according to these basic sensing functions are divided into thermal components, photosensitive components, gas sensitive components, force sensitive components, magnetic sensitive components, humidity sensitive components, acoustic sensitive components, radiation sensitive components, color sensitive components and taste sensitive components.

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