The sensor (English name: transducer/sensor) is a detection device that can sense the measured information and can transform the sensed information into an electrical signal or other required form of information output to meet the information. Requirements for transmission, processing, storage, display, recording, and control.
The characteristics of the sensor include: miniaturization, digitization, intelligence, multi-function, systemization, and networking. It is the first step in achieving automatic detection and automatic control. The existence and development of the sensor allows the object to have senses such as touch, taste and smell, and let the object slowly become alive. Generally, it is divided into ten categories, such as thermal element, photosensitive element, gas sensor, force sensor, magnetosensitive sensor, humidity sensor, sound sensor, radiation sensor, color sensor and taste sensor, according to its basic sensing function. .
In order to obtain information from the outside world, people must resort to the sensory organs. And by relying on people's own sensory organs, their functions in researching natural phenomena and laws and production activities are far from enough. To accommodate this situation, sensors are needed. Therefore, it can be said that the sensor is an extension of the human five senses, also known as electric five senses.
With the advent of the new technological revolution, the world has entered the information age. In the process of using information, the first thing to be solved is to obtain accurate and reliable information, and the sensor is the main way and means to obtain information in the natural and production fields.
In modern industrial production, especially in automated production processes, various sensors are used to monitor and control the various parameters of the production process, to operate the equipment in a normal or optimal state, and to achieve the best quality of the product. Therefore, it can be said that without many excellent sensors, modern production will lose its foundation.