With the development of modern automobile industry to light, energy-saving and intelligent, various sensors are widely used. Sensors play an important role in the engine, chassis, body system and electronic control system of pure electric vehicles. Especially for the pure electric vehicle, the sensor has become an indispensable core component. According to statistics, about 100 sensors of various types are installed on an ordinary family car, while the number of sensors on luxury cars can reach more than 200.
Classification of automotive sensors
The sensors used in automobiles can be divided into sensors for measuring temperature, pressure, flow, position, gas concentration, speed, brightness, dry humidity, distance and other parameters according to their functions. With the development of automotive electronic control technology, these sensors are applied in all parts of the body. They have different functions and perform their own duties. They transform the information of various working conditions, such as vehicle speed, temperature of various media and operating conditions of engine, into electric signal control system, so that the engine can be in the best working state. Once a sensor fails, the corresponding device will work abnormally or even can not work.
Performance requirements of sensors for electric vehicles
It includes the characteristics of output, reliability, reliability and so on. The sensors used in electric vehicles need to control the motor and generator effectively, so they must have higher precision than the traditional power vehicle sensors, so as to accurately detect the rotor speed, battery voltage and current and other parameters. Corresponding to the electric vehicle sensors used in the automobile manufacturing industry, there are the following requirements:
First of all, it should have good environmental adaptability. Due to the harsh working environment of electric vehicles, the temperature, humidity and other changes in a wide range, but also often faced with hot sun exposure, vibration and bumps, so the sensors used in electric vehicles must have good temperature resistance, water resistance and shock resistance.
Secondly, it is convenient for mass production. Electric vehicles are mass-produced, the same kind of sensor in a car to use several, dozens or even hundreds, so the demand for sensors is very large. Therefore, the sensors used in electric vehicles must meet the requirements of mass production.
Then there is the need to have very high precision. Voltage and current sensors and speed sensors with high precision must be used in electric vehicles. For example, the detection accuracy of the current is required to be within the range of 0.05 channel 1500 amperes.
In addition, the sensors used in electric vehicles must have high reliability, small volume and meet the requirements of relevant technical standards for electric vehicle sensors.
Global sensor market trends
Rapid growth, this is the global sensor market reflects the development trend. According to the market report provided by Intechno consulting, the global sensor market has reached nearly 100 billion US dollars per year, of which the United States, Germany and Japan have the largest market share, while eastern Europe, the Asia Pacific region and Canada have become the fastest growing regions of the sensor market.
At present, the important role of sensors for the modern automobile manufacturing industry has become a consensus in the industry. The more developed the automotive electronics and the higher the degree of automation, the greater the dependence on sensors. Many experts have pointed out that with the proposal of new automotive application system, there will be more sensors with better quality, and the market scale will continue to expand.