The hottest automotive sensor technology and appli

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Automotive sensor technology and application trend domestic technology is worrying

Language: the global sensor market is showing a rapid growth trend. In terms of the world, the fastest growing sensor market is still the automotive market. However, compared with the foreign sensor industry, China's automotive sensors have not yet formed an independent industry. Compared with similar foreign products, the level of China's automotive sensor products is more than 10 years different, so a variety of sensors, especially high-level automotive sensors, still rely on imports

the market report of intechnoconsulting, an information company, shows that the global sensor market capacity was $50.6 billion in 2008, and it is expected that the global sensor market will reach more than $60billion in 2010. Eastern Europe, Asia Pacific and Canada have become the regions with the fastest growth of the sensor market, while the United States, Germany and Japan are still the countries with the largest distribution of the sensor market. Worldwide, the fastest growing sensor market is still the automotive market

"there is no modern automobile without sensor technology" has become the consensus in the industry, which means that the more developed the electronization of automobile, the higher the degree of automation, the greater the dependence on sensors. In this regard, industry experts believe that in the future, new automotive application systems will spawn new automotive sensors to match them. The biggest feature of sensors is the continuous introduction of new technologies and the development of new functions. The general development trend of automotive sensor technology in the future is miniaturization, multifunction and intelligence

development trend of world automotive sensors

the data shows that about dozens of sensors are installed on an ordinary family car, and the number of sensors on a luxury car can reach as many as 2001 rivers cross villages. According to strategyanalytics, a market research organization, the sales of automotive sensors will reach $15.8 billion by 2012

vehicle sensors are roughly divided into three categories: powertrain, safety management system and body comfort system sensors. Among them, the power system sensor market accounts for the largest proportion, reflecting the most advanced technology of automotive sensors. For example, the angular error of the accelerator pedal position sensor must be within 0.4%; The throttle position sensor needs high reliability and can work at -50 degrees to 150 degrees

in the power system, active sensors lead the development trend. Cam and crankshaft sensors become the key of the power system because they are closely related to the "heart" engine of the car. The active cam sensor and crankshaft sensor can provide more protection for the power system, so it will lead the development trend in the future. It is estimated that in 2009, 58.2 million active crankshaft sensors will be put into use, while the number of passive sensors will be reduced to 21.5 million

in the safety management system, the pressure sensor realizes the control of the side airbag. Automobile safety management system is also a field where sensors are widely used. There are two schemes for the control of automobile side airbag: acceleration sensor and pressure sensor. Authoritative data shows that compared with the acceleration sensor, the pressure sensor is nearly three times faster than the acceleration sensor in detecting the side impact speed, and the probability of misoperation is smaller

in the body comfort system, doors, gearboxes and passive safety make the car more intelligent. In the door module, the DC motor position sensor is used in the door handle and window control, which adopts the distributed door module architecture and is connected through LIN bus. By using 2-axis or 3-axis angle/linear sensors, the gearbox can meet different gearbox position requirements and save costs. The specific sensor selection should be determined according to the function and design requirements of the automobile gearbox. Passive safety devices include the detection of seat load, the monitoring of seat belt opening/fastening, the detection of seat position adjustment (to ensure the effective protection of airbag system), etc. These control details also have a considerable demand for automotive sensors

acceleration, vibration and speed sensors are the three main sensors in vehicle motion measurement, which have maintained a stable and strong growth momentum. At present, there are more than 30 large enterprises producing these three kinds of sensors in the world, of which the top five companies account for 31.3% of the market share. For example, endevco accounts for 13.6%, wilcoxaresearch for 9.1%, Motorola for 4.2%, IMI for 3.0%, and analogdevices for 1.4%

the increasingly stringent requirements of emission regulations in western developed countries on exhaust emissions have promoted the development and production of automotive oxygen sensors. At present, the practical automobile oxygen sensors include germanium oxide oxygen sensor, titanium dioxide oxygen sensor and so on

it is worth mentioning that the micromachining technology is used to integrate and package the micron level sensor, signal conditioner and data processing device on a chip. Because of its small size, low price, easy integration and other characteristics, it can improve the test accuracy of the system. For example, by integrating the micro pressure sensor and micro temperature sensor together, and measuring the pressure and temperature at the same time, the temperature influence in the pressure measurement can be eliminated through the calculation in the chip. At present, many micro sensors have been introduced, such as pressure sensors, accelerometers, silicon accelerometers for collision avoidance, etc

micro pressure sensors embedded in automobile tires can maintain proper inflation and avoid over inflation or under inflation, thus saving fuel by 10%. The multifunctional feature enables the sensor to detect two or more characteristic parameters at the same time

intelligent sensors are equipped with special computers. Its rapid development has raised the safety performance of cars to an unprecedented level. With the development of microelectronics and micromachining technology, sensors are developing towards miniaturization, multifunction and intelligence

the development technology of automotive sensors in China is very worried.

strategyanalytics predicts that from 2004 to 2009, the global automotive sensors will show a growth rate of about 9%

the Chinese market is a fertile ground for the development of automotive sensors. In recent years, the sensor market in China has been growing continuously. According to the latest survey data of ccwresearch, the annual compound growth rate of China's automotive sensor market sales from 2007 to 2010 will exceed 35%. It is estimated that the sales volume of China's market will be close to US $1.05 billion in 2009, with a year-on-year growth rate of 40.5%; It is estimated that China's market sales in 2010 will exceed US $1.32 billion, with a year-on-year growth rate of 35.2%

China has leapt to the second largest auto market in the world. According to the data released by the China Association of automobile manufacturers, as early as 2007, when the energy-saving service industry was developed and expanded, China's auto production and sales had both exceeded 8.8 million, with a year-on-year increase of 22.02%, becoming the second largest auto consumer after the United States

in 2008, China's automotive sensor market reached US $5.7 billion. It is expected that China's automotive sensor market will reach 10 billion yuan in 2010 and 15 million vehicles in 2015. The trend of automotive electronics is that ECU is more and more centralized, and there are more and more sensors. The sensors used in China's EFI system account for more than 70% of the system. The cost of ABS (anti deadlock braking system) sensors is about 50 yuan, the domestic output is 1million sets, and the output value is 50million yuan; Airbag sensors account for more than 70% of the system cost. The price of airbag sensors is about 2000 yuan, and the demand is 1million sets/year, so the output value of sensors can reach 2.125% billion yuan year-on-year

industry experts are optimistic about the development prospect of automotive sensors in China. They believe that the increase in the number of cars and the increase in sensors used in each car determine that the capacity of China's automotive sensor market will continue to increase, and China's sensor market is entering a period of vigorous development

however, compared with foreign sensor industry, China's automotive sensor industry has not yet formed an independent industry. Since the 1980s, China's automotive industry has introduced foreign advanced technology and its supporting sensor production technology, which basically meets the supporting needs of domestic small batch and low-level models. The self-supporting sensors of China's automobile industry are only some low-end products. The vehicle sensor is a secondary supporting product for the vehicle factory, which must be entered into the vehicle factory in the form of system. When China's engine electronic control system is imported from abroad, its corresponding sensors are also imported into China

it can be seen that the overall level of China's automotive sensor industry is low, and a variety of sensors, especially high-level automotive sensors, still rely on imports. The sensor market is dominated by international parts giants such as Siemens, Bosch and Honeywell, while the domestic automotive sensor industry is developing slowly

insiders believe that the production technology and production scale of Chinese sensor enterprises currently do not meet the requirements of high-tech automotive industry for plastic processing enterprises, and more than 500000 sets of high-performance automotive sensors are imported every year. Compared with similar foreign products, the level of automotive sensor products in China differs by more than 10 years. For example, many crankshaft position and speed sensors produced by Chinese enterprises adopt electromagnetic or hall sensing methods, which have problems such as low accuracy, poor decomposition ability, low signal accuracy, weak anti-interference, etc. while similar foreign products have already adopted photoelectric type, effectively avoiding the above disadvantages

in addition, the development trend of miniaturization, multifunction, integration and intellectualization of automotive sensors puts forward higher requirements for the adoption of new processes and the development of new materials. Magnetic, gas, force, thermal, photoelectric, laser and other sensors came into being. The materials of sensors have also developed from metals to semiconductors, ceramics, optical fibers and other materials. In these aspects, there is a huge gap between Chinese enterprises and foreign-funded enterprises

at present, with the upgrading of automotive technology, domestic and foreign enterprises have listed automotive sensor technology as a high-tech development focus. Miniaturization, intellectualization, non-contact measurement and meas sensing technology will gradually replace the traditional mechanical, strain gauge, sliding potentiometer and other sensing technologies. Automotive sensors will make major breakthroughs in safety, energy conservation, environmental protection and intellectualization. The performance competition among major sensor manufacturers will improve the technical content of automotive sensors, reduce production costs, promote a new technological revolution, and promote the development of automotive sensor industry

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