transducer (English name: transducer/sensor) is a detection device that can feel the information being measured, and can transform the felt information into an electrical signal or other required form of information output according to a certain law to meet the requirements of information transmission, processing, storage, display, recording and control.
The characteristics of the sensor include: miniaturization, digitalization, intelligence, multi-function, systematization and networking. It is the primary link to realize automatic detection and automatic control. The existence and development of sensors, so that the object has the sense of touch, taste and smell, so that the object slowly become alive. It is usually divided into ten categories according to its basic sensing function, such as thermal element, photosensor, gas sensor, force sensor, magnetic sensor, humidity sensor, sound sensor, radiation sensor, color sensor and taste sensor.
Main role
In order to get information from the outside world, people must use the sensory organs. However, the function of people's own sensory organs in the study of natural phenomena and laws and production activities is far from enough. To adapt to this, sensors are needed. Therefore, it can be said that the sensor is an extension of the human features, also known as the electric features.
With the advent of the new technological revolution, the world begins to enter 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 the automated production process, various sensors should be used to monitor and control the various parameters in the production process, so that the equipment works in a normal state or a good state, and the product can achieve good quality. Therefore, it can be said that without many excellent sensors, modern production will lose its foundation.
In the basic subject research, the sensor has a more prominent position. The development of modern science and technology has entered many new areas: for example, to observe the vast universe of thousands of light-years on the macro, to observe the particle world as small as fm on the micro, to observe the evolution of celestial bodies for hundreds of thousands of years on the vertical, as short as the instant reaction of s. In addition, there has also been a variety of extreme technology research that has an important role in deepening material understanding, exploring new energy and new materials, such as ultra-high temperature, ultra-low temperature, ultra-high pressure, ultra-high vacuum, ultra-strong magnetic field, ultra-weak magnetic field and so on. Obviously, it is not possible to obtain a large amount of information that is not directly accessible to human senses without appropriate sensors. Many basic scientific research obstacles, first of all, is the difficulty in obtaining object information, and the emergence of some new mechanisms and high-sensitivity detection sensors often lead to breakthroughs in this field. The development of some sensors is often a precursor to the development of some fringe disciplines.
Sensors have long penetrated into extremely broad fields such as industrial production, space development, ocean exploration, environmental protection, resource investigation, medical diagnosis, bioengineering, and even cultural relics protection. It is no exaggeration to say that from the vast space, to the vast ocean, and even a variety of complex engineering systems, almost every modernization project is inseparable from a variety of sensors.
It can be seen that the important role of sensor technology in developing the economy and promoting social progress is very obvious. All countries in the world attach great importance to the development of this field. It is believed that in the near future, sensor technology will take a leap forward and reach a new level commensurate with its important position.
