Safety prompt device and prompt method for on-ramp vehicle to merge into main road

Abstract

The invention relates to the technical field of traffic safety facilities, and discloses a safety prompt device and prompt method for an on-ramp vehicle to merge into a main road. The device comprises a microprocessor, a millimeter wave radar and a display screen, wherein the millimeter wave radar is used for detecting the speed of the on-ramp vehicle and the distance between the on-ramp vehicle and the radar; the display screen is used for displaying the safety for the on-ramp vehicle to merge into the main road in real time; an output end of the millimeter radar is electrically connected with an I / O (Input / Output) input end of the microprocessor; an input end of the display screen is electrically connected with an I / O output end of the microprocessor; the millimeter radar is arranged on a bracket which is arranged at a tail end of a speed-up road section of a ramp to enter the main road; a detection surface of the millimeter radar faces the speed-up road section; the display screen is arranged below the millimeter radar. The selected safety evaluation index is a TTC (Time to Collision) value after a speed factor is added.

Description

technical field [0001] The invention relates to the technical field of traffic safety facilities, in particular to a safety prompting device and a prompting method for a ramp vehicle to merge into a main road. Background technique [0002] A ramp is a transition section for a vehicle to enter a high-speed zone from a low-speed zone. When a vehicle enters the main road through the ramp, the driver needs to obtain the traffic information behind the vehicle from the rearview mirror or the window glass, and make a safety judgment to avoid When merging into the main road, it collided with the car behind, causing traffic accidents such as rear-end collisions. In the design of existing expressway ramps in my country to avoid such traffic accidents, the design length of the ramp and the visibility of the driver to the rear vehicles are mainly considered; On the one hand, when merging into the main road through the ramp, the driver seldom pays attention to the vehicles behind, and th...

AI Technical Summary

Problems solved by technology

In the design of existing expressway ramps in my country to avoid such traffic accidents, the design length of the ramp and the visibility of the driver to the rear vehicles are mainly considered; On the one hand, when merging into the main road through the ramp, the driver seldom pays attention to the vehicles behind, and the acceleration time on the ramp is too short, and merges into the main road before accelerating to a safe speed, resulting in a potential accident risk; on the other hand, The intelligent transportation infrastructure at the ramp intersection is not perfect, and many drivers lack subjective judgments on the safety of such situations, or the judgment error is relatively large, and the existing road section does not consider whether it is safe for vehicles on the ramp to merge into the main road.

This has brought great inconvenience to the driver's safe travel.

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