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Trunk road vehicle speed planning method based on single intersection traffic signal information

A technology of traffic signals and traffic lights, which is applied in the field of intelligent auxiliary control of automobiles, and can solve problems such as vehicle speed planning

Inactive Publication Date: 2014-12-03
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, there is no technology and method for vehicle speed planning in China.

Method used

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  • Trunk road vehicle speed planning method based on single intersection traffic signal information
  • Trunk road vehicle speed planning method based on single intersection traffic signal information
  • Trunk road vehicle speed planning method based on single intersection traffic signal information

Examples

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Embodiment 1

[0065] Taking Beijing Zizhuyuan South Road to Xihuangchenggen North Street as an example, the driving route map is as follows: figure 2 shown. It starts from Zizhuyuan South Road and ends at Xihuangchenggen North Street. The road passes through ten intersections with traffic lights: Capital Stadium South Road, Sanlihe Road, Wenxing East Street, Zhanzhan Road, Chegongzhuang North Street, Guanyuan Bridge, Yuyou Hutong, Zhaodengyu Road, Xinjiekou Main Street and Xihuangchenggen North Street.

[0066] Get nearest traffic light data. When the car enters the road section, it first obtains the change data of the signal light at the nearest traffic intersection through the wireless communication system t s , s ∈ {g, r}. s is the type of signal light, g is for green light, and r is for red light. There are two situations in the signal light change situation, such as image 3 shown. When the signal light is initially red, the time for the first change to green is defined as Th...

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Abstract

A trunk road vehicle speed planning method based on single intersection traffic signal information includes the following steps that (1) data of the nearest traffic signal lamp are obtained; (2) the distance between a vehicle and the nearest traffic signal lamp is obtained; (3) the time range of the vehicle passing through a traffic intersection is determined; (4) an optimized vehicle speed is calculated; (5) whether the optimized vehicle speed has a computed result is judged, the step (6) is turned to if the optimized vehicle speed has the computed result, and otherwise the vehicle runs at a planned vehicle speed and the step (7) is turned to; (6) the vehicle runs at a constant initial speed and then runs at an accelerated speed or a decelerated speed; (7) the vehicle runs at the accelerated speed or the decelerated speed and then runs at the constant speed; (8) whether the vehicle runs at a too low initial speed for a long time in the step (6) is judged, and if the vehicle runs at the too low initial speed for a long time in the step (6), the step (9) is turned to; (9) accelerated running time, constant speed running time and braking time are calculated; (10) whether the vehicle needs to pass through the next intersection is judged, if the vehicle needs to pass through the next intersection, the step (11) is turned to, and otherwise the vehicle arrives at the destination.

Description

technical field [0001] The invention belongs to the field of intelligent auxiliary control of automobiles, relates to a speed planning method of a main road based on traffic signal information of a single intersection, and is also of great significance for the control of hybrid electric vehicles and electric vehicles. Background technique [0002] The oil crisis has always been one of the important problems facing my country's economic development. Reducing the fuel consumption of automobiles can effectively reduce the oil consumption in the field of urban transportation, which is of great significance to the sustainable development of energy in my country. The fuel consumption of traditional cars is closely related to the driver's acceleration and braking operation process, as well as idling time. When the car is running on the fast road, it can run freely, the engine should keep rotating at a constant speed as much as possible, and the fuel economy is relatively good. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/00
Inventor 张昕田毅张欣张良
Owner BEIJING JIAOTONG UNIV
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