Vehicle danger warning system

Abstract

The invention discloses a vehicle danger warning system. The vehicle danger warning system is mainly a short-range (Short Range Radar) K-wave-band millimeter wave radar sensor system with the quite-high cost performance; the monitoring distance is 50 m, the LFM+FSK modulation mode with the high complexity is adopted, the distance of transportation targets can be detected, and the vehicle danger warning system has the high distance measurement accuracy and the high velocity measurement accuracy, and has the functions of blind spot detection (BSD), lane changing assisting (LCA), emergency assisting (EAF), forward object traversing alarming (FCTA) and the like.

Description

technical field [0001] The invention relates to the structural field of a danger warning system, in particular to a vehicle danger warning system. Background technique [0002] With the intelligent development of automobiles, the current safety auxiliary equipment used in vehicles are radar, laser, ultrasonic, infrared, machine vision and other sensor technologies. These safety auxiliary equipment have obvious limitations in the application of vehicle danger warning. [0003] The distance measurement accuracy of the radar is high, the data processing requirements are low, and the robustness to the weather is good, but its reliability depends on the distance and reflectivity of the target, and often cannot detect short and transparent obstacles, because the information is relatively simple , it is also difficult to identify obstacles. [0004] The application of laser ranging has limitations. In fact, due to the fact that the laser is susceptible to natural weather factors, ...

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Problems solved by technology

[0003] The distance measurement accuracy of the radar is high, the data processing requirements are low, and the robustness to the weather is good, but its reliability depends on the distance and reflectivity of the target, and often cannot detect short and transparent obstacles, because the information is relatively simple , it is also difficult to identify obstacles

[0004] The application of laser ranging has limitations. In fact, due to the fact that the laser is susceptible to natural weather factors, the cleanliness of the laser emitting and receiving windows, the surface roughness of the detected vehicle and the obstacle itself, pollution, and the bumps of the car during driving, etc. Influenced by various aspects, the detection distance, detection accuracy and accuracy of the laser anti-collision radar are affected to a certain extent.

[0005] Ultrasonic detection distance is short, greatly affected by weather conditions

The propagation speed in the air is small and changes with temperature and weather factors, and the propagation speed is different under different weather conditions; on the other hand, for long-distance obstacles, the reflected wave is too weak due to a lot of interference and influence , the sensitivity decreases, and it is easy to cause ranging errors

[0006] Infrared ranging is not difficult technically, and the cost of the ranging system is low, but it still cannot meet the requirements of car collision avoidance in bad weather and long-distance detection, especially on highways, during high-speed driving. , there will be a certain degree of ranging error

[0007] Machine vision has the advantages of rich detection information, and has a good ability to analyze the shape and texture features of objects, but it is greatly affected by the weather and the environment, and it is helpless for obstacles with similar colors and background colors.

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