Method and system for optimizing vehicle passing speed in crossing automatically
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An automatic optimization and intersection technology, applied in the field of intelligent transportation, can solve the problems of prolonged vehicle passing time and vehicles occupying intersections, etc., to achieve the effect of increasing the traffic speed
Inactive Publication Date: 2017-09-22
QIANXUN SPATIAL INTELLIGENCE INC
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[0004] Aiming at the above-mentioned defects in the prior art, the present invention provides a method for automatically optimizing the speed of vehicles at intersections, which solves the problem of traffic jams caused by unreasonable traffic light setting time and vehicles occupying intersections for a long time, resulting in a large traffic time of vehicles in all directions. Extended Technical Questions
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Embodiment 1
[0045] Embodiment 1, the workflow of the high-precision positioning device, such as figure 2 As shown, the high-precision positioning device adopts cost-effective RTK equipment, that is, the carrier phase difference technology is used to eliminate some common errors in satellite positioning, including atmospheric errors, ionospheric errors, etc. The workflow includes the following steps:
[0046] Obtain and calculate the position information of the car through satellite;
[0047] For the purpose of saving users' mobile network traffic, the calculated high-precision location information is matched with the intersection location information of the offline map through the map matching algorithm;
[0048]If the car is about to approach the intersection, the high-precision positioning device will upload the car's location information to the cloud server in real time;
[0049] If the car leaves the intersection for a certain distance, the high-precision positioning device stops up...
Embodiment 2
[0050] Embodiment 2, the workflow of the signal light control system, such as image 3 shown, including the following steps:
[0051] The signal light control system switches the intersection signal light according to the parameter information stored in the machine;
[0052] If the configuration information sent by the cloud server is received, update the configuration information of the signal light;
[0053] If the timing time is reached, the signal light control system will upload the configuration information of the signal light to the cloud server.
[0054] The present invention preferably uses Java and C++ to develop the cloud server, and preferably uses C language to develop the vehicle-mounted terminal high-precision positioning device.
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Abstract
The invention relates to a method and system for optimizing the vehicle passing speed in a crossing automatically. A map lane matching algorithm is combined, and when a vehicle is within certain distance to the crossing, the ID number, latitude and longitude, positioning flag bit, speed, lane information and the like of the vehicle are uploaded to a cloud-end server in real time. According to information when the vehicle passes the crossing, the cloud-end server calculates the vehicle flow rates in different directions of a present road in real time, a mathematical model is combined, parameters of a signal lamp controller of the crossing are adjusted in a remote control way, and a closed-loop control system is formed. The larger the number of vehicles provided with high-precision positioners is and the more data samples the cloud-end server collects, the better the dynamic traffic light time adjusting effect is. According to the method and system, when the crossing is obstructed, when certain vehicle occupy the crossing for a long time can be monitored in real time, and an electronic ticket of traffic violation can be sent the vehicle which occupies the crossing for long time by combining related punishment prescriptions of local traffic police.
Description
technical field [0001] The invention relates to the technical field of intelligent transportation, in particular to a method for automatically optimizing vehicle speed at intersections. Background technique [0002] In recent years, with the rapid development of the economy, the continuous expansion of the city scale, the continuous increase of the population and vehicles, resulting in serious traffic jams on important roads and important crossings in the city. And because the time setting of traffic lights at many intersections is unreasonable, the traffic flow in all directions is diverted without rivers, and the passing time of vehicles appears to be greatly lengthened. In the morning and evening rush hours, vehicles in the east-west and north-south directions even do not want to give way to each other, causing "intestinal obstruction" on the road, and road traffic is completely paralyzed. In response to this situation, the current countermeasures mainly rely on a large ...
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