Automatic driving speed control system and method based on high-precision navigation and positioning system

Abstract

The invention relates to the technical field of automatic driving, in particular to an automatic driving speed control system and method based on a high-precision navigation and positioning system. The automatic driving speed control method comprises the following steps of: obtaining road relevant information stored in a high-precision map of an existing road section; fusing the road relevant information stored in the high-precision map of the existing road section with vehicle travelling state information to calculate target vehicle speed suitable for automatic driving; comparing the target vehicle speed with existing vehicle speed; if the target vehicle speed is greater than or smaller than the existing vehicle speed, sending an engine enabling signal and an engine torque request instruction to an engine controller, and enabling the existing vehicle speed to be equal to the target vehicle speed, wherein the engine controller correspondingly regulates engine torque according to the engine torque request instruction. According to the automatic driving speed control system and method, a power system and a brake system are controlled in advance to take measures, so that the vehicle speed is timely corrected, and the problem that vehicle speed control is not timely is effectively solved. Under an emergency situation, a brake lamp is light to remind a vehicle behind to control vehicle speed, so that rear-end collision is avoided.

Description

technical field [0001] The invention relates to the technical field of automatic driving, in particular to an automatic driving speed control system and method based on a high-precision navigation and positioning system. Background technique [0002] Autopilot technology has gone through decades of development from its inception to the present. Driving on flat roads, with the help of laser radar, millimeter-wave radar, cameras and other sensors to identify the road, the automatic driving function can be better realized. Since the above-mentioned sensors cannot identify the slope, and in extreme weather such as rain, snow, fog, etc., the road signs beyond the distance (300 meters) cannot be effectively identified, causing the driver to find that the distance is too close, and the speed cannot be adjusted in time. It is prone to traffic accidents, which seriously affects the safety of vehicles, members, property and pedestrians, and also affects the comfort of automatic drivi...

AI Technical Summary

Problems solved by technology

Since the above-mentioned sensors cannot identify the slope, and in extreme weather such as rain, snow, fog, etc., the road signs beyond the distance (300 meters) cannot be effectively identified, causing the driver to find that the distance is too close, and the speed cannot be adjusted in time. It is prone to traffic accidents, which seriously affects the safety of vehicles, members, property and pedestrians, and also affects the comfort of automatic driving

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