Development trend and prediction of sensors for th

2022-08-07
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Development trend and forecast of vehicle sensors

the global sensor market is showing a rapid growth trend. It is reported that the global sensor market capacity in 2008 was US $50.6 billion, and it is expected that the global sensor market will reach more than US $60billion in 2010. Eastern Europe, the Asia Pacific region 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, corresponding to the six scales of surface Rockwell. 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 electronics and automation of the automobile, the greater the dependence on sensors. In this regard, industry experts believe that in the future, new automotive application systems will give birth to new automotive sensors. The biggest feature of sensor development is the continuous introduction of new technologies to develop 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 more than 200. It is estimated that the sales of automotive sensors will reach US $15.8 billion by 2012

vehicle sensors can be roughly divided into three categories: power system, safety management system and body comfort system sensors. The power system sensor market accounts for the largest proportion, which reflects 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 ° to 150 °

in the power system, active sensors lead the development trend. Cam and crankshaft sensors become the key to the power system because they are closely related to the "heart" engine of the automobile. 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

in the safety management system, the pressure sensor controls 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 show 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 on the door handle and window control. The distributed door module architecture is adopted and connected through LIN bus. The gearbox can meet different gearbox position requirements and save costs by using two-axis or three-axis angle/linear sensors. The specific sensor selection should be determined according to the functions 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 in the world that produce these three types of sample sensors with two blades in vertical contact, of which the top five companies account for 31.3% of the market share. For example, endevco accounts for 13.6%, wilcoxa research for 9.1%, Motorola for 4.2%, IMI for 3.0%, and analog devices 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 one chip. Because of its small size, low price and easy integration, it can improve the test accuracy of the system. For example, if the micro pressure sensor and micro temperature sensor are integrated together, and the pressure and temperature are measured at the same time, the temperature influence in the pressure measurement can be eliminated through the on-chip operation. At present, there are many micro sensors available, such as pressure sensors, accelerometers, silicon accelerometers for collision avoidance, etc

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

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

development status of automotive sensors in China

automotive sensors are one of the core contents in the field of automotive electronic technology. This paper briefly introduces the application and development of automotive sensors in China, as well as several main sensors in automobiles, and prospects the development trend

● large scale of automotive sensor market

market research data show that the global market scale of automotive sensors in 2002 was US $7.01 billion, and the global market demand for automotive sensors in 2002 was 1.038 billion. The development of China's automotive industry has accelerated. It is estimated that the production capacity of 15million vehicles will be reached in 2010. If 10 sensors are used for each vehicle, 150million sets of sensors and their supporting transmitters and instruments will be required

there are 20million cars in China, increasing at a rate of more than 5% every year, but at present, the "EFI" cars only account for about 10%. The state stipulates to stop the production of "carburetor" cars, and all newly delivered cars are required to be installed with "EFI" systems. Shanghai United Automotive Electronics now produces 1.2 million sets of "EFI" system sensors per year. The displacement display on the upper display of about 40 is 00 ~ 6000 yuan/set, of which the automotive sensors account for more than 60% of the output value. The sensors used in the domestic EFI system account for more than 70% of the system. The cost of ABS 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 2billion yuan

● automotive sensors play an important role

as the information source of automotive electronic control system, automotive sensors are the key components of automotive electronic control system and one of the core contents of automotive electronic technology research. Automobile sensors can measure and control temperature, pressure, position, speed, acceleration, vibration and other information in real time and accurately. The key to measure the level of modern high-end car control system is the number and level of its sensors. At present, about 100 sensors are installed on a domestic ordinary family car, while the number of sensors on a luxury car is up to 200

in recent years, micro electro mechanical system (MEMS) technology developed from semiconductor integrated circuit technology is becoming more and more mature. With this technology, various micro sensors that can sense and detect mechanical, magnetic, thermal, chemical and biological quantities can be made. These sensors have small volume and energy consumption, and can realize many new functions, which are convenient for mass and high-precision production, with low single piece cost, It is easy to form a large-scale and multi-functional array, which is very suitable for automotive applications

the large-scale application of micro sensors will not only be limited to engine combustion control and airbag, but also will provide a broad market for MEMS technology in the next 5 to 7 years, including engine operation management, exhaust gas and air quality control, ABS, vehicle power control, adaptive navigation and vehicle driving safety system

● the production level of domestic automotive sensors is low.

since the 1980s, the domestic automotive instrument 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. Due to its late start, it has not yet formed a series, supporting and independent industry, and is still attached to the automobile instrument enterprises

new electronic products are used in many cars, light vehicles and some trucks, which require large quantities of high-level automotive sensors. However, the current highest level automotive sensor products in China are more than 10 years behind similar foreign products, and more than 500000 sets of high-performance automotive sensors are imported every year

in order to enhance the competitiveness of their products, many sensor manufacturers have adopted the mode of joint venture with foreign counterparts, digested and absorbed foreign advanced sensor technologies, upgraded their products, and gradually developed and expanded. Some have become downstream suppliers of several major "EFI" system manufacturers. However, the vast majority of enterprises are only supporting the production of other vehicle sensors, which is in a situation of low profit, single product, low product quality and technical level

with the rapid growth of domestic automobile output, the demand of domestic automobile industry for sensors and their supporting transmissions and instruments will also increase greatly in the next few years. It is imperative to realize the localization of automobile sensors. In order to adapt to this situation, we should focus on the development of new pressure, temperature, flow, displacement and other sensors, and it is a very urgent task to solve the sensors required by the EFI system, air-conditioning sewage system and auto drive system for the automotive industry as soon as possible. Automobile sensors are secondary supporting products for the whole vehicle factory, and must be supplied to the whole vehicle factory in the form of system. The strength of the primary system supplier is related to the brand of the main engine factory, so a system platform must be established to drive the development of sensors with the system

development trend of China's automotive sensors

the development trend of automotive sensor technology in the future is miniaturization, multifunction, integration and intelligence. Automotive sensors and electronic systems are developing towards MEMS sensors

at the end of the 20th century, the development of design technology, material technology, especially MEMS technology has raised the micro sensor to a new level. The micro electronic machining technology is used to package the micron level sensitive elements, signal processors and data processing devices on the same chip. It has the characteristics of small size, low price, high reliability, and can significantly improve the system test accuracy. At present, MEMS technology can be used to make micro sensors to detect mechanical, magnetic, thermal, chemical and biological quantities. Because of the advantages of MEMS micro sensors in reducing the cost of automotive electronic systems and improving their performance, they have begun to gradually replace the sensors based on traditional electromechanical technology. MEMS sensors will become an important part of automotive electronics in the world

philips electronics has changed the pointer back to zero. Onics and continental Teves have sold 100million sensor chips for automotive ABS system in 10 years, reaching a new milestone in production. The two companies jointly developed the forward-looking technology of active magnetic field sensor, and the products are applied to the latest cars produced by automobile manufacturers. Continental Teves has made wheel speed sensor with this magnetoresistive speed sensor

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