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Method and system for road intersection traffic signal in-vehicle sensing

A traffic signal and perception system technology, applied in the field of traffic signal perception at road intersections, can solve the problems of not being able to provide real-time display status of traffic lights, and achieve the effects of ensuring accuracy and continuity, facilitating debugging, and preventing accidental running of red lights

Inactive Publication Date: 2014-12-17
NANJING UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

[0004] At present, some existing vehicle assisted driving technologies, such as vehicle navigation and guidance systems, can provide drivers with road traffic information services, including the location of traffic lights on the driving route, but cannot provide real-time display status of traffic lights

Method used

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  • Method and system for road intersection traffic signal in-vehicle sensing

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Embodiment Construction

[0048] In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.

[0049] Such as figure 1 As shown, according to a preferred embodiment of the present invention, a method for in-vehicle perception of traffic signals at road intersections includes the following steps:

[0050] Step 1. Set the signal period T, the vehicle start time t1 and the yellow light time t0 according to the geometric conditions of the intersection;

[0051] Step 2. Obtain the headway t(i) of each entrance in seconds, and calculate the hourly flow s(i) of the entrance accordingly: s(i)=3600 / t(i);

[0052] Step 3. Calculate the green light ratio p(i) of each intersection: And assign the effective green time tg(i) of each entryway accordingly:

[0053] tg(i)=(T-n*(t0+t1))*p(i)

[0054] Wherein, the aforementioned n is the number of entrances;

[0055] Step 4. Executing traffic signal timi...

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Abstract

The invention provides a method for road intersection traffic signal in-vehicle sensing. The method comprises a first step of setting signal periods and vehicle starting time and yellow time according to intersection geometric conditions; a second step of obtaining the time headway of each entrance channel, and accordingly calculating the hour flow of the entrance channel; a third step of calculating the green lamp proportion of each intersection and accordingly distributing effective green time of each entrance channel; a fourth step of executing traffic signal timing according to distribution results through a traffic instrument; a fifth step of judging whether red time of some entrance in timing results exceeds a signal period T; if the red time of some entrance in the timing results exceeds the signal period T, returning to the second step, or else sending the timing results to a vehicle-mounted receiving end. The invention further relates to a system for road intersection traffic signal in-vehicle sensing.

Description

technical field [0001] The invention relates to the technical field of intelligent traffic safety, in particular to a method and system for in-vehicle perception of traffic signals at road intersections. Background technique [0002] The continuous increase in the number of motor vehicles has caused increasing congestion in urban traffic, resulting in frequent traffic accidents, which seriously threaten people's lives and property safety. Therefore, strengthening road traffic control and management is one of the important research topics in the current traffic field. [0003] The important factor that causes traffic accidents is the motor vehicle driver. Any carelessness in driving a car may threaten the safety of life and property of oneself and others. The three golden principles of "careful driving" are: concentrate attention, observe carefully and prevent in advance , even if the driver achieves the first two subjectively, many unsatisfactory driving conditions (strong l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/0967
Inventor 曹从咏高宁波连欢李翔姚鹏
Owner NANJING UNIV OF SCI & TECH
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