The sensor on the car is the information source of the car electronic control system, the key component of the car electronic control system, and one of the core contents of the research in the field of car electronic technology.Automotive sensors perform real-time, accurate measurement and control of various information such as temperature, pressure, position, rotational speed, acceleration, and vibration. The core of the sensor on the car, the engine control sensor and several new sensor products are introduced below.The engine management system uses a variety of sensors and is the core of the entire car sensor. There are many types, including temperature sensors, pressure sensors, position and speed sensors, flow sensors, gas concentration sensors, and knock sensors.These sensors convert the engine intake air volume, cooling water temperature, engine speed and acceleration and deceleration into electrical signals and send them to the controller. The controller compares these information with the stored information, and outputs control signals after accurate calculation.The engine management system can not only precisely control the fuel supply to replace the traditional carburetor, but also control the ignition advance angle and idle air flow, which greatly improves the performance of the engine.
Nowadays, the development of the automobile industry has led to more sensors on the car, and the characteristics of the sensors have also made the car more intelligent. For example, the tire pressure monitoring system is to install a micro pressure sensor in each wheel frame to measure the air pressure, and through A wireless transmitter transmits the information to the driver in front of the driver.When the tire pressure is too low, the system will automatically issue an alarm to remind the driver to deal with it in time. This can not only ensure the safety of the car while driving, but also protect the tread, prolong the service life of the tire and achieve the purpose of saving fuel.Tire pressure monitoring sensors accurately measure tire pressure and temperature and transmit this information wirelessly to receivers installed in the car. Air pollution inside cars now poses a new threat to the health of car owners, mainly from carbon monoxide.With the rapid increase in the number of car owners, the air quality in the car has begun to receive attention. The carbon monoxide sensor has the characteristics of high sensitivity, strong anti-interference and low power consumption, and is specially used to ensure the safety of air quality in the car. At the same time, the application is simple, the service life is long, and the air quality in the car can be monitored in time. The carbon monoxide sensor is divided into the automatic switching system of the internal and external circulation of the air conditioner in the car, and the carbon monoxide alarm for the car and the passenger car.
At the 2003 Human and Vehicle Technology Exhibition, the tilt sensor for vehicle anti-theft was exhibited. The angle sensor adopts a 2-axis acceleration sensor, which can timely detect the tilt of the vehicle caused by the vehicle being lifted during theft, and issue an alarm. This acceleration sensor is an electrostatic capacity sensor. The British Insurance Association decided in April 2003 to provide preferential insurance to vehicles equipped with anti-theft angle sensors. Similar promotions will also be launched in Japan, where vehicle theft cases have increased sharply in the future, and it is estimated that the market demand for angle sensors will increase day by day.The new thick-film piezoresistive non-contact automotive oil pressure sensor is made with thick-film force-sensing technology and surface micro-assembly technology to monitor engine lubricating oil pressure and realize low oil pressure alarm.It has passed the bench test, type test and 60,000 durability tests, and can directly replace the existing bimetal sliding wire type YG2221G oil pressure sensor. Compared with the existing sliding wire type oil pressure sensor, it has the characteristics of high precision, no contact with mechanical parts, high reliability, long life, corrosion resistance, matching with digital instruments, low cost, and high performance-price ratio. It is not difficult to see that the application of acceleration sensors on automobiles will be the biggest trend of the automobile industry in the future.
Post time: Sep-14-2022