The pressure sensor is the most commonly used sensor in industrial practice. It is widely used in various industrial self-control environments. It is widely used in water conservancy and hydropower, railway transportation, intelligent building, production control, aerospace, military, petrochemical, oil well, electric power, ship and machine tool. , Pipes and many other industries, the following brief on some of the commonly used sensor principle and its application. Another medical pressure sensor.

　　　The basic principle of multi-sensor information fusion technology is the same as the human brain's integrated information processing. The sensors are processed by multi-level and multi-spatial information complementation and optimized combination, and finally produce the consistent interpretation to the observation environment. In this process, we should make full use of multi-source data to rationally control and use, and the ultimate goal of information fusion is to derive more useful information from multi-level and multi-facet combination based on the separated observation information obtained by each sensor. This not only makes use of the advantages of multiple sensors cooperating with each other, but also integrates the data of other information sources to improve the intelligence of the whole sensor system.

　　Pressure sensors are one of the most widely used sensors. The traditional pressure sensor is mainly composed of the mechanical structure type, and the pressure is indicated by the deformation of the elastic element, but the structure is large in size and heavy in weight, and can not provide electrical output. With the development of semiconductor technology, semiconductor pressure sensor also came into being. It is characterized by small size, light weight, high accuracy, good temperature characteristics. Especially with the development of MEMS technology, the semiconductor sensor to the miniaturization development, and its power consumption is small, the reliability is high.