关键词: 智能小车；STM32；红外循迹；超声波避障；无线通信

Abstract: With the continuous development of science and technology, mobile robots are widely used in various industries, and intelligent cars represent an important branch in this research field. This paper designs an intelligent car system centered on the STM32 microcontroller, adopting a modular design approach. In terms of hardware, the STM32 microcontroller serves as the main controller, integrating infrared and ultrasonic sensors to achieve path recognition and obstacle detection respectively, while establishing wireless communication through a bluetooth module. In terms of software, the main program scheduling enables multiple working modes such as line tracking, obstacle avoidance, and smartphone remote control. This study verifies the effectiveness of embedded systems in complex perception and control tasks. Its modular and scalable design also lays a technical foundation for subsequent functional enhancements, demonstrating good practical value and promotional significance.

Key words: intelligent car; STM32; infrared line tracking; ultrasonic obstacle avoidance; wireless communication