智能避障小车设计与实现:89C52单片机控制原理及性能测试
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use and versatility has been highly praised by users. This paper introduces how to use the 89C52 microcontroller to implement a graduation design, which is a design class topic determined in combination with scientific research projects. This system is aimed at the requirements of the design topic, using the 89C52 microcontroller as the control core, and using four infrared sensors and their processing modules to detect black lines and obstacles; controlling the electric car for automatic obstacle avoidance, fast and slow speed driving, as well as automatic parking and automatic movement according to black line markings. The microcontroller generates PWM waves and controls the direction and speed of the car through the L293D driver. The circuit structure of the entire system is simple, with high reliability and performance. The experimental test results meet the requirements, and this paper focuses on the hardware design method and test result analysis of the system. The technologies used mainly include: (1) controlling the movement of the car through programming; (2) effective application of sensors; (3) PWM intelligent speed control; (4) H-bridge DC motor drive circuit for controlling the car's forward and reverse movements. Keywords: 89C52 microcontroller, photoelectric detector, PWM speed control, L293D - SCM HUNT OBSTACLE AVOIDANCE CAR DESIGN.
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