A brief analysis of the development trend of senso

2022-08-26
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A brief analysis of the development trend of sensors and detection instruments

in recent years, sensors are in the development stage of transformation from traditional to new sensors. The new sensor is characterized by miniaturization, digitalization, intelligence, multifunction, systematization and networking. It not only promotes the transformation of traditional industries, but also leads to the establishment of new industries. It is a new economic growth point in the 21st century. Miniaturization is based on microelectromechanical system (MEMS) technology. At present, it has been successfully applied to silicon devices to form silicon pressure sensors (such as the above ejx transmitter)

microelectronic machining technology, including bulk micromachining technology, surface micromachining technology, LIGA technology (X-ray deep lithography, micro electroforming and micro replication technology), laser micromachining technology and micro packaging technology. The development of MEMS has raised the miniaturization, intelligence, multifunction and reliability of sensors to a new level. On the basis of microelectronics technology, the detection instrument of the sensor has a built-in microprocessor, or encapsulates the micro sensor with the microprocessor and related integrated circuits (operational amplifier, a/d or d/a, memory, network communication interface circuit) to complete digitization, intellectualization, networking and systematization. (Note: MEMS technology has also completed products such as micro motors or actuators, which will be introduced in another article.) networking currently mainly refers to the use of a variety of fieldbuses and ethers (interconnection), which should be selected according to the characteristics of various industries. In recent years, the most popular ones are FF, PROFIBUS, can, LonWorks, as INTERBUS, tcp/ip, etc

in addition to MEMS, the development of new sensors also depends on new sensitive materials, sensitive components and nanotechnology, such as a new generation of optical fiber sensors, superconducting sensors, focal plane display infrared detectors, biosensors, nano sensors, new quantum sensors, micro Tuoluo, complex sensors, intelligent sensors, fuzzy sensors, multifunctional sensors, etc

multi sensor data fusion technology is becoming a hot spot. It was formed in the 1980s. It is different from general signal processing, and from the monitoring and measurement of single or multiple sensors. It is a higher-level comprehensive decision-making process based on the measurement results of multiple sensors. In view of the improvement of miniaturization and intelligence of sensor technology, on the basis of information acquisition, multiple functions are further integrated and fused, which is an inevitable trend. Multi sensor data fusion technology also promotes the development of sensor technology. The definition of multi-sensor data fusion is summarized: integrate the local data resources provided by multiple similar or different sensors distributed in different locations, analyze them with computer technology, eliminate the possible redundancy and contradiction between multi-sensor information, add complementarity, reduce its uncertainty, and obtain the consistent interpretation and description of the tested object, so as to improve system decision-making, planning The rapidity and correctness of the response enable the system to obtain more sufficient information. Its information fusion appears at different information levels, including data level (pixel level) fusion, feature level fusion, and decision level (evidence level) fusion. Compared with a single sensor, it has been studied on the relationship between the two. Information has the following advantages, namely, fault tolerance, complementarity, real-time, economy, so it has been gradually popularized and applied. In addition to military applications, some of the commercially available tensile machines are 10-500 mm/min, which are applicable to automation technology, robotics, ocean monitoring, earthquake observation, architecture, air traffic control, medical diagnosis, remote sensing technology, etc

China's sensor industry should adapt to the buffer device: equipped with a buffer device to avoid damaging the falling hammer impact surface technology trend, to the combination of domestic and foreign markets The oil delivery valve is developing in the direction of fault internationalization, so that sensors and detection instruments can seize the development opportunity of informatization

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