Current situation and development trend of the hot

2022-10-04
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Current situation and 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 industrial and military changes. It is a new economic growth point in the 21st century. In the process of industrialization of sensor production, China should not relax in introducing foreign technology and independent innovation. In the introduction of foreign advanced technology, we can improve our own technology, but also meet the needs of the domestic market, forming a sensor production industry scale

the importance of sensors and detection instruments

industrial equipment will encounter various mechanical quantities and geometric quantities in the manufacturing process and the performance test of the whole machine. Some industrial equipment will often detect or monitor some mechanical quantities and electric quantities in operation. These mechanical quantities include displacement, speed, acceleration, force, torque, power, pressure, flow, temperature, hardness, density, temperature, specific gravity, viscosity, etc. geometric quantities include length, angle, shape, position, surface roughness, surface waveform, etc., which belong to physical quantities. In fact, people will encounter chemical quantities and biomass (including medicine) in production, life and scientific experiments. From the perspective of signals, all these need to be converted into electrical signals (which can also be converted into optical signals in modern times) through sensors, and then carry out signal transmission, processing, storage, display and control. From the perspective of information, these signals, together with sound and image information, are the source of information, Therefore, sensors, detecting instruments and measuring instruments are important parts of the three parts of information science and Technology (information acquisition, information transmission and information processing)

in modern industrial equipment, the reason why sensors and detection instruments are an indispensable part can also be seen from the following two aspects: if the traditional industrial equipment is added with necessary sensors and equipped with precision measuring parts (accessories), its function and accuracy can be improved, which is convenient for users to operate and maintain, the safety level can also be improved, and the equipment can be added value; As the control object of the automation system or as a part of the automation system, industrial equipment must be compatible with the three parts of the automation system (detection, control, execution) or provide interfaces, so that it can be integrated into an organic whole. Whether it is single machine automation or as a part of a large automation device, the use of the industrial equipment will be expanded. To sum up, adding sensors, detection instruments, measuring instruments or providing interfaces as industrial equipment itself is a necessary condition for the upgrading of traditional equipment

sensor is a device that converts non electrical signals. In the case of analog circuit, the detection instrument generally includes sensor, detection point sampling equipment and amplifier (for anti-interference processing and signal transmission), of course, power supply and field display part (optional). The electrical signal is generally divided into continuous quantity and discrete quantity, and in fact, it can also be divided into analog quantity, switching quantity, pulse quantity, etc, Unified signal (4~20madc, etc.) is adopted for analog signal transmission. In the process of digitization, the detection instruments change a lot. After several stages, ASIC special integrated circuits are mostly used recently, and the sensors, microprocessors and network interfaces are encapsulated in one device to complete the functions of information acquisition, processing, transmission, storage and so on. In automatic instruments, detectors are often called transmitters, such as temperature transmitters, pressure transmitters, etc

because sensors are used in all walks of life, coupled with the rapid development of household appliances, automobiles and information industry in recent years, the demand for sensors has increased greatly, so the sensor manufacturing industry has developed rapidly and formed an independent industry, which has stimulated the development of industrial equipment, especially semiconductors and equipment manufacturing industry. Therefore, it is necessary for China to pay special attention to the sensor industry

sensor products have many varieties, adopt many scientific principles, and are technology intensive. They are diverse, marginal, comprehensive, and skilled. They need the cooperation of multiple disciplines and a variety of high and new technologies. Although they have high additional benefits, their prices are not high. Therefore, it is difficult to promote the development of the sensor industry

current situation of sensors and detection instruments

sensor products have a wide variety of categories. They are mainly used in the process industry: temperature sensors, pressure sensors, weight sensors, flow sensors, liquid level sensors, oxygen sensors, various force sensors, gas sensors, analytical instruments, etc. they are also used in the mechanical industry: proximity/positioning sensors, safety door switches and other safety sensors Rotary encoder, vision sensor, speed sensor, acceleration sensor, etc

at present, domestic sensors are divided into 10 categories, 24 sub categories and 6000 varieties. There are more varieties in China. For example, there are about 17000 kinds of sensors in the United States, so the field of developing sensor varieties in China is very broad

the Chinese sensor market has been growing continuously in recent years, with a growth rate of more than 15%. In 2003, the sales volume was 18.6 billion yuan, with a year-on-year increase of 32.9%; The world non military sensor market was $32.5 billion in 1998, with an average growth rate of 9%. It is expected to increase to $50.6 billion in 2008. In 2003, the four major fields of sensor application in China were industrial and automotive electronic products, communication electronic products, and special equipment for consumer electronic products, of which industrial and automotive electronic products accounted for 33.5% of the market share. Due to the reform and opening up, China's huge market has attracted manufacturers from various countries, such as Siemens, Yokogawa, Honeywell, Omron, Bonner and so on, which has brought great convenience to end users and industrial equipment manufacturers. Although the production of domestic sensors and detection instruments has developed, it is far from keeping up with the requirements of the situation, and the thrust calculation of electromagnetic vibration testing machines. The scale of sensor production and research and development in various countries is expanding. There are about 1300 manufacturers producing and developing sensors in the United States, more than 100 research institutes and colleges, and 800 manufacturers in Japan. In recent years, China has established research and development bases such as the State Key Laboratory of sensor technology and the State Key Laboratory of micron/nano technology, and initially established the sensitive elements and sensor industry. The total output in 2000 exceeded 1.3 billion. At present, China has 1688 enterprises engaged in the production and research and development of sensors, of which more than 50 are engaged in the research and production of MEMS. By the end of the tenth five year plan, the total annual output of sensitive elements and sensors has reached 2billion

China has also found a new way to participate in the international sensor market competition. For example, the sensor National Research Center of Shenyang Institute of instrumentation science has exported 400000 force sensitive sensor chips to the United States

sensor technology includes four aspects: sensitive mechanism, sensitive materials, process equipment and measurement technology, and there are about 30 kinds of technologies. With the development of microelectronics technology, sensor technology is developing rapidly, and China still needs a lot of investment in research and development. In particular, we should strengthen the development of sensors with independent intellectual property rights, the transformation of scientific research achievements and the industrialization of sensor production, which is an urgent problem in China. In the case of mass production, we should control the performance of sensor products (mainly stability and reliability) to make it have a high qualification rate, We need advanced manufacturing technology and high-level automation process equipment. China should work hard to develop special process equipment to solve the bottleneck of sensor production industrialization; The application of sensors, especially the application of new sensors, has not been vigorously promoted. The reform and opening up have created favorable conditions. Various industrial equipment has applied advanced sensors, which has expanded the sensor market and given impetus to the industrialization of new sensor production in China

in the process of sensor production industrialization, China should give consideration to the introduction of foreign technology and independent innovation. In the introduction of foreign advanced technology, we can improve our own technology, but also meet the needs of the domestic market, forming a sensor production industry scale. For example, the ejx multivariable transmitter recently released by Yokogawa company is an example that can be considered to introduce technology. It has high precision (0.025%) and high degree of intelligence. Using fieldbus technology, it can transmit various variables and information such as mass flow, medium pressure, duct blockage, diagnosis, steam tracing diagnosis and orifice wear to the central control room through fieldbus; It is very beneficial to ensure production, provide equipment maintenance information and ensure safe operation. The development of this new type of transmitter is in line with the reform of automation system management and control integration. Only when the ability of information source is strong and the information is rich, can informatization better promote the development of productivity. In addition, it has a broad market, because it is used in many industries such as petrochemical industry, metallurgy and electric power

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 industrial and military changes. 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 ejx transmitters above). Microelectronic machining technology, including bulk micromachining technology, surface micromachining technology, l1ga 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, sensors and detection instruments have built-in microprocessors, or micro sensors, microprocessors and related integrated circuits (operational amplifiers, a/d, d/a, memory, network communication interface circuits) are packaged together to complete digitization, intellectualization, networking and systematization. In terms of networking, at present, it mainly refers to the use of a variety of fieldbus and Ethernet (interconnection), which requires selecting one or more of them according to the needs of various industries. In recent years, the most popular ones are FF, PROFIBUS, can, LonWorks, AS-I, 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, and the further integration and fusion of multiple functions based on information acquisition, how to control the color difference of injection molded products? Inevitable trend. The variety of multi-sensor lithium series products is complete, the product processing chain is long, and the process technology is comprehensive. The data fusion technology also promotes the development of sensor technology

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