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Analysis and Implementation of the Control Algorithms of the Smart Car

This paper introduces the design and implementation of a smart car system that can orient the illuminating beacon. After debugging and testing, the system has good accuracy and speed. Combining image recognition, path decision, adaptive obstacle avoidance and other control algorithms, the system is an original model and has certain practical significance for vehicle electronic technologies. Introduction In recent years, automobile and technology companies have continuously innovated in-vehicle electronic technologies. The development trends are characterized by security, networking, and intelligence[1]. Intelligent car, also known as wheeled mobile robot, is the integration of the environmental awareness, planning and decision-making, and automation-running[2]. This paper designs a smart car based on MDK60DN512ZVLQ10 (K60) and OV7620 camera for directional movement of illuminating beacons. The system combines image recognition, speed control, straight line fitting algorithms and so on, which have practical significance for the smart car control. System Structure Overview of Hardware Design Scheme The Microcontroller Unit(MCU) of the smart car system is two master-slave cooperated K60. The sensors are two OV7620 cameras and two incremental encoders. The front-facing camera is used to obtain the position of the illuminating beacon and the obstacle, and the right-facing camera is used to search for the illuminating beacon in the right area, assisting the car to judge the direction autonomously. The encoder is used to obtain the current speed and mileage. After receiving and processing the completed image, the master K60 combines the slave K60 information to obtain the target speed and the target angle. According to the current speed fed back by the encoders, the motor speed control and steering control are realized by pulse width modulation (PWM), in order to achieve the directional movement of the smart car to the luminous beacon. The system adopts LCD display, dial switch and Bluetooth module for debugging. The LCD display can output camera image and various position parameters. The dial switch is used to change the running mode of the car, and the Bluetooth module is used to remotely control the car. According to the design, the system structure diagram is shown in Fig.1.