Prompt device and method for ramp speed limit value

Abstract

The invention provides a ramp speed limiting value prompting device and method and relates to the field of traffic safety. According to the invention, the device and the method comprises steps of based on a current environment image or the current travel speed, or based on the current environment image and a road type, recognizing whether the acquired current environment image includes a ramp speed limiting identifier; then, when the current environment image includes the ramp speed limiting identifier, according to the current environment image or the current position information or the travel state information, judging whether a vehicle enters a ramp preparation state; and when the vehicle enters the ramp preparation state, generating a speed limiting value prompt corresponding to the ramp speed limiting identifier, thereby achieving precise determination of the ramp speed limiting identifier. According to the invention, through the precisely determined ramp speed limiting identifier, it is determined that the vehicle enters the ramp preparation state, and at this moment, a speed limiting value prompt corresponding to the ramp speed limiting identifier is generated, so precise speed limiting value prompting is achieved when the vehicle travels on the ramp, error judgment will not be caused and experience of the driver is improved.

Description

technical field [0001] The invention relates to the field of traffic safety, in particular to a ramp speed limit value prompting device and method. Background technique [0002] Ramp, also known as approach road, usually refers to a section of connecting road that provides vehicles entering and exiting the main line and adjacent auxiliary roads or other main lines, such as high-speed entrance and exit ramps, elevated entrance and exit ramps. Due to the particularity of the ramp, in order to ensure driving safety, ramp speed limit signs are usually arranged at the entrance and exit of the ramp and inside the ramp, and the speed of the vehicle is generally required to be lower than 40km / h. Usually, the vehicle needs to collect the speed limit sign to generate the speed limit value prompt information, which is used to remind the driver to control the vehicle speed within the speed limit range represented by the speed limit sign. [0003] In traditional technology, the recognit...

AI Technical Summary

Problems solved by technology

[0003] In traditional technology, the recognition of ramp speed limit signs, especially the ramp speed limit on elevated roads, usually means that when the vehicle-mounted camera detects the speed limit information, no matter whether the vehicle enters the ramp or not, the vehicle is driving on the expressway without entering the ramp. When the ramp is intended but the ramp speed limit sign is photographed, the vehicle displays the speed limit value, which leads to misjudgment and poor driving experience for the driver

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