Sensor (English Name: transducer / sensor) is a kind of detection device, which can feel the measured information and transform the sensed information into electrical signal or other required forms of information output according to a certain law, so as to meet the requirements of information transmission, processing, storage, display, recording and control.
The characteristics of the sensor include miniaturization, digitization, intellectualization, multifunction, systematization and networking. It is the primary link to realize automatic detection and automatic control. The existence and development of sensors make objects have senses such as touch, taste and smell, and make objects slowly become alive. According to its basic sensing function, it is usually divided into ten categories: thermal element, photosensitive element, gas element, force element, magnetic element, humidity element, sound element, radiation element, color element and taste element.
The characteristics of sensors include miniaturization, digitization, intelligence, multi-function, systematization and networking. It not only promotes the transformation and upgrading of traditional industries, but also may establish new industries, so as to become a new economic growth point in the 21st century. Miniaturization is based on micro electro mechanical system (MEMS) technology. It has been successfully applied to silicon devices to make silicon pressure sensors.
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