The role of sensors
Information technology has become a global strategic technology today，As a functional device for the perception, collection, conversion, transmission and processing of various information, sensors have become indispensable core components in various application fields, especially automatic detection and automatic control systems.Sensor technology is deeply affecting various fields of national economy and national defense construction.For example, in the automatic production process of chemical products, the raw materials must first be automatically weighed and analyzed for the composition or concentration of the raw materials when they are fed. After they are mixed in proportion, they will automatically react in the reaction vessel. At this time, the content in the vessel must be measured. Pressure or volume, if it is a liquid, also need to automatically control the height of the container liquid level。
Then, the semi-finished products are transported in the production line (pipeline), which requires the use of hydraulic or pneumatic equipment to generate driving force to control the transport speed or flow, so the pressure or pressure must be detected...At the end, the finished product must be automatically divided and weighed.All these links need to use various sensors to detect and control the corresponding non-electricity, so that the equipment or system can automatically and normally run in the best state, and ensure the high efficiency and high quality of production.
For another example, on various spacecraft, a variety of sensors are used to measure and control the flight parameters, attitude and engine working status of the spacecraft, and the various signals obtained by the sensors are then sent to various measuring instruments and automatic control systems for automatic adjustment. , So that the spacecraft can fly normally according to the pre-designed orbit.
The sensor is the primary component of the information acquisition system, the main link for realizing modern measurement and automatic control (including remote sensing, telemetry, and remote control), the source of information, and the material and technological foundation for the existence and development of the information society.Now, sensor technology, information technology, and computer technology have become the three pillars supporting the entire modern information industry.It is conceivable that if there is no sensor with high fidelity and reliable performance, and no advanced sensor technology, then the accurate acquisition of information becomes empty talk, and information technology and computer technology become passive water.At present, from space exploration, ocean development, environmental protection, disaster forecasting to the research of every modern science and technology including life sciences and people's daily life, almost all are closely connected with sensors and sensor technology.It can be seen that the application, research and development of sensors and sensor technologies are inevitable requirements of the information age. Therefore, it is no exaggeration to say: Without sensors and their technology, there will be no rapid development of modern science and technology.