There are 20 million cars in China, and the annual growth rate is over 5%. The "EFI" car only accounts for about 65,438+00%. The state stipulates that the production of carburetor cars should be stopped, and all new cars should be equipped with "EFI" system. Shanghai United Automotive Electronics has an annual output of1.2000 sets of sensors for EFI system, and the price of each set is * * * 4,000 ~ 6,000 yuan, of which automotive sensors account for more than 60% of the output value. Sensors used in domestic EFI systems account for more than 70% of the system. The cost of ABS sensor is about 50 yuan, and the domestic output is 6.5438+0 million sets, with an output value of 50 million yuan. The airbag sensor accounts for more than 70% of the system cost. The price of airbag sensor is about 2000 yuan, the demand is 65.438+00,000 sets/year, and the output value of sensor can reach 2 billion yuan. As the information source of automobile electronic control system, automobile sensor is the key component of automobile electronic control system and one of the core contents in the field of automobile electronic technology. Automobile sensors measure and control various information such as temperature, pressure, position, speed, acceleration and vibration in real time and accurately. The key to measure the level of modern luxury car control system lies in the number and level of its sensors. At present, there are about 100 sensors installed on an ordinary family car in China, while the number of sensors on luxury cars is as high as 200.
In recent years, MEMS technology developed from semiconductor integrated circuit technology is becoming more and more mature. Using this technology, various micro-sensors can be made to sense and detect mechanical quantities, magnetic quantities, heat quantities, chemical quantities and biomass. These sensors are small in size, low in energy consumption, can realize many brand-new functions, are convenient for mass production and high-precision production, and are easy to form large-scale and multifunctional arrays, so they are very suitable for automobile applications.
The large-scale application of micro-sensors will not be limited to engine combustion control and airbags. In the next 5-7 years, applications including engine operation management, exhaust gas and air quality control, ABS, vehicle power control, adaptive navigation and vehicle driving safety system will provide a broad market for MEMS technology. Since 1980s, the domestic automobile instrument industry has introduced foreign advanced technology and its supporting sensor production technology, which has basically met the supporting needs of domestic small-batch and low-grade automobiles. Because of its late start, it has not yet formed serialization and matching, and has not yet formed an independent industry, and it is still attached to automobile instrument enterprises.
Many cars, light vehicles and some trucks adopt new electronic products, which require a large number of high-level automobile sensors. However, the highest-level automobile sensor products in China are behind similar products abroad 10 years, and more than 500,000 sets of high-performance automobile sensors are imported every year.
In order to enhance the competitiveness of products, many sensor manufacturers have adopted the way of joint venture with foreign companies in the same industry, digested and absorbed foreign advanced sensor technology, and upgraded their products, thus gradually developing and expanding, and some have become downstream suppliers of several major "EFI" system manufacturers. However, most enterprises are only supporting the production of other automobile sensors, which are in a state of low profit, single product and low product quality and technical level.
With the rapid growth of domestic automobile production, the demand of domestic automobile industry for sensors and their supporting transmissions and instruments will also increase greatly in the next few years, so it is imperative to realize the localization of automobile sensors. In order to adapt to this situation, it is urgent to focus on developing new sensors such as pressure, temperature, flow and displacement, and solve the sensors needed for EFI system, air conditioning sewage system and automatic driving system in automobile industry as soon as possible. Automobile sensor is a secondary supporting product of automobile factory, and it must enter automobile factory in the form of system. The strength of the first-class system supplier is related to the brand of the main engine factory, so it is necessary to establish a system platform to drive the development of sensors with the system.