The sensor is a detecting 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 transmission, processing, storage and display. Requirements for recording, control, etc., which are the primary steps for automatic detection and automatic control. Sensing technology, together with computer technology and communication technology, is called the three pillars of information technology. From the perspective of bionics, if the computer is regarded as the "brain" that processes and identifies information, and the communication system is regarded as the "neural system" that transmits information, then the sensor is the "sensory organ." With the development of related technologies such as sensor technology, data processing technology, computer technology, network communication technology, artificial intelligence technology and parallel computing software and hardware technology, multi-sensor information fusion technology has received extensive attention. With the advancement of science and technology, multi-sensor information fusion has been formed and developed into a specialized technology for information processing, and is quickly applied to industrial robots, intelligent detection, automatic control, traffic management and medical diagnosis. . In the 1990s, China began the research and development of multi-sensor information fusion technology, and developed the application system of multi-sensor identification, positioning and other similar information fusion. Nowadays, multi-sensor information fusion technology is more and more It has received widespread attention. The basic principle of multi-sensor information fusion technology is like the process of human brain comprehensive processing information. Multi-level, multi-space information complementation and optimization combination processing are performed, and finally a consistent interpretation of the observation environment is generated. In this process, multi-source data should be fully utilized for rational control and use, and the ultimate goal of information fusion is based on the separated observation information obtained by each sensor, and more useful information can be derived through multi-level and multi-faceted combination of information. This not only takes advantage of the synergy of multiple sensors, but also comprehensively processes the data of other information sources to improve the intelligence of the entire sensor system. The multi-sensor fusion system features four distinctive features: Information redundancy For a certain feature of the environment, multiple pieces of information (or multiple different moments of a single sensor) can be obtained from multiple sensors, which are redundant and have different reliability, which can be extracted from the fusion process. More accurate and reliable information. In addition, the redundancy of information can improve the stability of the system, thus avoiding the impact on the entire system due to the failure of a single sensor. Information complementarity Different kinds of sensors can provide different kinds of information for the system, and the objects described by the information are different environmental characteristics, which are complementary to each other. If you define a coordinate space consisting of all features, then the information provided by each sensor belongs to only one subspace of the entire space, independent of the space formed by other sensors. Timeliness of information processing The processing of each sensor is independent of each other, and the entire process can adopt a parallel heat conduction processing mechanism, so that the system has a faster processing speed and provides more timely processing results. Low cost of information processing Multiple sensors can be used at a lower cost to get the amount of information that a single sensor can get. On the other hand, if the information provided by a single sensor is not used to implement other functions, the sum of the cost of a single sensor and the cost of multiple sensors is comparable. The pin refers to the connection between the internal circuit of the integrated circuit (chip) and the peripheral circuit, and the pin constitutes the interface of the chip. According to the function, the pins of AT89S52 can be divided into four categories: main power supply, external crystal oscillator or oscillator, multi-function I/O port, and control, strobe and reset. Terminal Pins,Terminal Hardware Pin,High Precision Terminal Pins,Terminal Pins For Pcb Sichuan Xinlian electronic science and technology Company , https://www.sztmlch.com