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City expressway ramp merging area safety early warning system

A safety early warning system, early warning system technology, applied in the direction of collision avoidance system, etc., can solve the problem of poor safety early warning effect in the confluence area, achieve obvious economic and social benefits, good early warning effect, and improve the effect of safety environment

Active Publication Date: 2017-08-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the safety early warning effect of the existing urban expressway ramp confluence area is not good, and proposes a kind of urban expressway ramp confluence area safety early warning system

Method used

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  • City expressway ramp merging area safety early warning system
  • City expressway ramp merging area safety early warning system
  • City expressway ramp merging area safety early warning system

Examples

Experimental program
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specific Embodiment approach 1

[0019] Specific implementation mode one: combine figure 1 Describe this embodiment, the urban expressway ramp merge area safety early warning system described in this embodiment, this early warning system includes information collection system 1, information processing system 2 and vehicle early warning system 3;

[0020] Information collection system 1, used to collect vehicle information in the merge area of ​​urban expressway ramps;

[0021] The information processing system 2 is used to obtain the PET value according to the vehicle information in the ramp merge area of ​​the urban expressway, compare the PET value with the preset PET threshold, and send an early warning signal when the PET value is less than the PET threshold;

[0022] The PET value is the difference between the time when the head of the rear vehicle reaches the intrusion line and the time when the rear of the front vehicle leaves the intrusion line during the merging process of vehicles in the merging are...

specific Embodiment approach 2

[0027] Specific embodiment two: This embodiment is to further limit the safety early warning system of the urban expressway ramp merge area described in the specific embodiment one. In this embodiment, the information processing system 2 includes an information collection unit 2-1, a merge Area conflict identification algorithm unit 2-2 and main control unit 2-3;

[0028] The information collection unit 2-1 is used to receive vehicle information in the merge area of ​​the urban expressway ramp;

[0029] Conflict recognition algorithm unit 2-2 in the merge area, used to obtain the PET value according to the vehicle information in the merge area of ​​the urban expressway ramp;

[0030] The main control unit 2-3 is used to compare the PET value with a preset PET threshold, and when the PET value is smaller than the PET threshold, the main control unit 2-3 sends an early warning signal.

specific Embodiment approach 3

[0031] Specific implementation mode three: combination figure 2 Describe this embodiment, this embodiment is to further limit the urban expressway ramp merge area safety warning system described in the second specific embodiment, in this embodiment, the merge area conflict identification algorithm unit 2-2 is through the merge area conflict identification The model realizes the calculation of the conflict recognition algorithm in the merge area;

[0032] The conflict identification model in the merge area is:

[0033]

[0034] In the formula: T 1 Represents the time when vehicles on the main road arrive at the starting point of the merge conflict area; T 2 Represents the time when the ramp vehicle arrives at the starting point of the merge conflict area; v A Represents the vehicle speed on the main road; v B Represents ramp vehicle speed; a A Represents the vehicle acceleration on the main road; a B Represents ramp vehicle acceleration; x A Represents the distance f...

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Abstract

The invention provides a city expressway ramp merging area safety early warning system, belongs to the field of road transportation signal control, and aims at solving the problem that an existing city expressway ramp merging area is not good in safety early warning effect. The method comprises the steps that an information acquisition system acquires vehicle information of a city expressway ramp merging area; an information processing system obtains a PET value, the PET value is compared with a preset PET threshold value, and when the PET value is smaller than the PET threshold value, an early warning signal is sent; the PET value is a difference of the time when a vehicle head of a vehicle of the merging area arrives at an invasion line and the time when the vehicle tail of a front vehicle leaves the invasion line in the merging process, wherein the invasion line is a virtual straight line which is perpendicular to a lane boundary and intersects with a lane changing track; a vehicle-mounted early warning system sends early warning. The city expressway ramp merging area safety early warning system has the advantages that early warning on a driver is achieved in the angle of vehicle-road coordination, and a safe environment of a city expressway entrance ramp merging area is improved.

Description

technical field [0001] The invention belongs to the field of road traffic signal control. Background technique [0002] The expressway system plays the role of the main skeleton road network in the traffic of large cities. Ensuring the efficient operation of the expressway system has always been the top priority of the traffic management department. [0003] The on-ramp is the channel for the transition between the continuous flow of urban expressways and the discontinuous flow of urban roads. The conflict between on-ramp vehicles and vehicles on the main road will make the area near the entrance of the ramp a traffic accident-prone area, especially due to design factors or geographical conditions, near the intersection of many entrance ramps and main roads, drivers on the ramp cannot see To the vehicles on the main road, and the driver on the main road can not see the vehicles on the ramp, unless the vehicles are very close to the meeting point, they can enter each other's...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/16
Inventor 马艳丽蒋贤才吴昊天胡宝雨范璐洋史惠敏
Owner HARBIN INST OF TECH
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