Research On Active Anti-Collision System Of Automobile Door Opening Based On Millimeter Wave Radar

With the increasing number of vehicles and the growing complexity of traffic conditions,the proportion of car door collision accidents in overall traffic accidents is steadily rising,posing a significant risk of personal injury and property damage.Reducing this issue has become an urgent task.This paper presents a research and design of an active collision prevention system for car doors based on domestically produced millimeter-wave radar chips.The system targets objects within the range of car door arcs and designs radar waveforms based on system requirements.By employing kinematic theory and actual measurement errors,an active collision prevention model is developed,and data processing algorithms are optimized.The study investigates the collision risks posed by obstacles with different Radar Cross Sections(RCS)and determines their collision risk by comprehensively assessing distance,velocity,and angle parameters.The relevant information is then transmitted to the car gateway to execute subsequent active collision prevention strategies.First,by comparing various sensors,the current research status of automotive collision warning systems is analyzed,considering their performance,advantages,and stability.A superior and interference-resistant millimeter-wave radar chip is selected.The advantages and disadvantages of millimeter-wave radar waveform schemes and operating frequencies are explained,along with the configuration of working principles and functional requirements.Next,the principle of the active collision prevention system for car doors is introduced,and a model for the active collision prevention warning system is designed based on system requirements.Personalized radar waveform design is emphasized to highlight the system’s high accuracy while balancing overall performance.Parameters at each stage are optimized,and the OS-CFAR detection algorithm is improved to enhance the accuracy of multi-target detection and the overall stability of the system.Furthermore,the system functionality is implemented through hardware selection and software design,including the development of application layer code.The active collision prevention model determines the warning range,real-time collection of target information from multiple directions,and comparison with predefined thresholds.A comprehensive judgment is made to determine whether to transmit the signal through the car bus to the gateway for implementing active collision prevention strategies.Finally,the bare board is tested in a microwave darkroom and radar simulator to ensure that the radar performance indicators meet the system requirements.Multiple rounds of testing on the HiPhiX demonstrate that the system,when coordinated with the car door,achieves a success rate of 98.29% for stationary targets and 94.87% for moving targets.This significantly enhances the safety performance of opening car doors for drivers and passengers,providing a reliable solution for intelligent transportation car door collision warning technology.