The Research And Design Of Automatic Parking System

Since the car appeared, the development of the car brought to people’s lives more and more convenience.In today’s world,development of automobile technology,In a way represents the highest level of science and technology.Especially in recent years, as technology innovation and enhance people’s lifestyle, Car is no longer seen as a luxury for people,and gradually into the average home.With the popularity of the range car in people’s lives become more and more widely,the accident occurred because the parking is also increasing,the difficult of Parking get more people’s attention. Compared to traditional automatic car parking system, by state sensor and the image sensor detects the vehicle body in the process of parking the vehicle,and it also required the driver’s operation. Although this method is to some extent eased the pressure on the reverse of the driver, but did not improve the safety of intelligent vehicle parking and parking process fundamentally. Therefore, the research and development of a parking process safer and more efficient cars automatic parking system, has become a hot moment intelligent vehicle research.To solve these problems, the paper domestic and foreign existing car automatic parking system in depth research, and on this basis, proposes a car automatic parking control system.Firstly, the subject of the decision-making system, automatic parking system has been studied, including analysis of the vehicle in parallel, perpendicular, three parking parking trajectory oblique mode, the fuzzy algorithm design and optimization of the fuzzy algorithm. Next, introduce the overall framework of the system, and the composition of the system control unit, the vehicle surroundings signal acquisition unit and an execution unit three sections were analyzed. The use of ultra-wave sensor for free parking spaces for testing, analysis obtained free parking spaces which way to fit through the test data, the system determines the feedback data of parking policy; Using ultrasonic sensors and inertial navigation system composed of sensing system of the vehicle is responsible for collecting parking information, vehicle surrounding environment and detect body posture information; use ARM processors for signal processing the collected data, the use of fuzzy control and immune genetic algorithm control rules optimization, the system can automatically select different parking control algorithm based on the circumstances of parking spaces, so the car automatically into parking spaces. Then, the hardware and software systems for a detailed design. Among them, the hardware includes:control chip selection, STM32 power supply circuit design, crystal oscillator circuit design, JTAG interface circuit design, ultrasonic sensors, inertial navigation system, a display unit (HMI), the voice unit; Software part describes the main algorithm flow system. By Mat lab fuzzy algorithm and immune genetic algorithm based on fuzzy algorithm optimized for the simulation, the results proved through fuzzy controller optimized algorithm can be completed in a more compact automatic parking parking space environment, with important applications.