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Method for controlling signal priority of emergency vehicle at intersection based on two-stage optimization process

An emergency vehicle, signal priority technology, applied in the direction of road vehicle traffic control system, traffic control system, instruments, etc., can solve the problem that emergency vehicles cannot pass with absolute priority.

Inactive Publication Date: 2011-06-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a signal priority control method for emergency vehicles at intersections based on a two-stage optimization process, so as to solve the defect that the condition priority control method in the prior art cannot allow emergency vehicles to pass with absolute priority

Method used

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  • Method for controlling signal priority of emergency vehicle at intersection based on two-stage optimization process
  • Method for controlling signal priority of emergency vehicle at intersection based on two-stage optimization process
  • Method for controlling signal priority of emergency vehicle at intersection based on two-stage optimization process

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specific Embodiment approach 1

[0017] Specific implementation mode one: the following combination figure 1 This embodiment will be specifically described. This embodiment is realized based on an emergency vehicle signal priority system at an intersection, which includes a vehicle detector subsystem 1, an emergency vehicle detection and locator subsystem 2, an intelligent signal controller subsystem 3 and Communication Subsystem4.

[0018] Vehicle detector subsystem 1: Complete the flow detection of all vehicles; vehicle detector subsystem 1 can complete the detection of the flow of all social vehicles. There are many kinds of vehicle detectors that have been put into use, including magnetic induction detectors, wave frequency Vehicle detectors, video detectors, etc. Among the above three vehicle detection methods, the loop coil vehicle detection method has the most mature technology, the most widely used, and the lowest cost, which can fully meet the requirements of all vehicle flow information. Therefor...

specific Embodiment approach 2

[0038] Specific implementation mode two: the following combination figure 2 This embodiment will be specifically described. The difference between this embodiment and Embodiment 1 is: the intelligent signal controller subsystem 3 is composed of an intelligent decision-making module 3-1 and a signal output module 3-2, and the signal output terminal of the intelligent decision-making module 3-1 is connected to the signal output module 3 input of -2;

[0039] The intelligent decision-making module 3-1 calculates the moment when the emergency vehicle arrives at the intersection and the dissipation time of other vehicles in the direction of the entrance of the emergency vehicle based on the received information, and determines whether it is possible to give green lights to other phases according to the signal phase status of the intersection and the length of the green light time; after the emergency vehicle passes the intersection, the intelligent decision-making module 3-1 opti...

specific Embodiment approach 3

[0041] Specific implementation mode three: the following combination figure 2 This embodiment will be specifically described. The difference between this embodiment and the second embodiment is that the intelligent decision-making module 3-1 includes a normal signal control module 3-1-1, an emergency vehicle signal priority module 3-1-2, and an emergency signal priority conversion model 3-1- 3 and the emergency signal priority recovery model 3-1-4, one signal output terminal of the normal signal control control module 3-1-1 is connected to the signal input terminal of the emergency vehicle signal priority module 3-1-2, and the emergency vehicle signal priority module 3 The signal output terminals of -1-2 are respectively connected to the signal input terminals of the emergency signal priority conversion model 3-1-3 and the emergency signal priority recovery model 3-1-4, and the emergency signal priority conversion model 3-1-3 and the emergency signal priority The signal outp...

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Abstract

The invention discloses a method for controlling the signal priority of an emergency vehicle at an intersection based on a two-stage optimization process, which relates to a method for controlling the signal priority of an emergency vehicle at a road intersection, solves the problems that the emergency vehicle cannot be provided with absolute priority to pass by a condition priority control method in the prior art and is used for traffic control. The method comprises the following steps of: when the emergency vehicle requests the priority to pass the intersection, detecting the existence of the emergency vehicle and transmitting information to an intelligent signal controller subsystem; computing the time during which the emergency vehicle reaches the intersection from a detection position and the dissipation time of queuing vehicles in the entrance direction of the emergency vehicle according to the received emergency vehicle information and the information of the queuing vehicles onall driveways in different entrance directions so as to acquire the green time in other entrance directions; and providing the signal priority for the emergency vehicle according to the signal state at the current intersection so as to advance or delay the green time and reduce the delay time of other vehicles simultaneously.

Description

technical field [0001] The invention relates to a signal priority control method for emergency vehicles at road intersections. Background technique [0002] After urban disasters or emergencies occur, emergency rescue vehicles play a vital role in transporting relief materials, rescuing victims' lives and reducing property losses. However, during the response process, emergency rescue vehicles often encounter problems such as road congestion, which prevents emergency vehicles from reaching the accident site in time. Implementing the signal priority of emergency rescue vehicles at intersections can effectively reduce the response time of emergency vehicles and reduce the risk of collisions when emergency vehicles pass through the intersection, thereby improving the efficiency and timeliness of emergency vehicle rescue. [0003] Judging from the research results at home and abroad, the research on signal priority of urban public transport vehicles is relatively in-depth. If ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/087
Inventor 安实崔建勋王泽王健胡晓伟
Owner HARBIN INST OF TECH
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