CN111341126A - A road signal indicating system suitable for signal intersection - Google Patents

Abstract

The invention discloses a road signal indicating system suitable for signal intersections, which comprises a power supply device, a control system and an LED indicating device, wherein the power supply device is connected with the control system through a power supply line; the power supply device comprises a solar cell panel and a storage battery which are arranged outside the road, the solar cell panel is connected with the storage battery, and the storage battery is connected with the control system and the LED indicating device; the control system and the power supply device are arranged in the integrated box, and the control system is connected with the LED indicating device by converting the set signal phases of the lanes in different directions into specific indicating periods and allowed vehicle length information; the LED indicating device displays the information converted by the control system through indicating lamps with different colors, thereby achieving the effect of reminding and indicating. The invention has simple structure and strong practicability, can give effective indication signals to a driver under the condition that the rear vehicle is shielded from the view by the front large-scale vehicle, and avoids traffic accidents caused by untimely braking.

Description

A road signal indicating system suitable for signal intersection

technical field

The invention relates to the technical field of road traffic facilities, in particular to a road signal indication system suitable for signal intersections.

Background technique

At present, motor vehicles often encounter many signalized intersections when driving on urban roads. However, due to the mixed types of social vehicles and different lengths, heights and widths of vehicle bodies, some vehicles are often blocked by the vehicle ahead and cannot know where they are located. Signal light information in the air ahead. The occurrence of this situation will make the driver unable to start and brake in time. Lightly, the efficiency of the fleet passing through signalized intersections is reduced, and in the worst case, traffic accidents are caused due to insufficient braking. Under the existing technical conditions, there is no better method for solving such problems.

Some of the existing innovative technologies still have the following ill-considerations:

1. An innovative three-dimensional signal light (public number: CN208027578U), although the signal is extended to the signal light pole through the LED light chain, but because it is also located in front of the driver, it is also difficult to observe the blocked vehicle. In addition, this kind of signal light can only prompt information in one direction, so it has little effect.

2. Another signal light based on holographic projection (publication number: CN206849275U) can make it easier for the rear vehicle to know the signal situation, but because the projection consumes a lot of electricity, the price is high, the use is easily affected by the environment, and it cannot solve the problem well.

SUMMARY OF THE INVENTION

Aiming at the shortcomings of the above-mentioned prior art, the present invention provides a road signal indication system suitable for signalized intersections, which provides timely, effective and easy-to-understand indication signals for vehicles on urban roads whose vision is affected by a large vehicle ahead.

The present invention is realized by at least one of the following technical solutions.

A road signal indication system suitable for a signalized intersection, comprising a power supply device, a control system and an LED indication device; the power supply device comprises a solar panel and a battery arranged outside the road, the solar panel is connected with the battery, and the The battery is connected with the control system and the LED indicating device; the control system and the battery are arranged in an integrated box; the control system is connected with the LED indicating device to provide indicating information for the LED indicating device; the LED indicating device includes Indicator lights, the information converted by the control system is displayed through indicator lights of different colors.

Further, the power supply device allows direct access to the power supply system of the original signal light to provide power for the control system and the LED indicating device.

Further, the LED indication device includes several LED light groups, and the LED light groups are connected in parallel with each other to ensure that the failure of a single LED light group does not affect the overall indication effect.

Further, several LED light groups are embedded in different lane markings to ensure that the vehicle does not change lanes.

Further, the LED light group includes several indicator lights, and the indicator lights have three colors of red, green and yellow.

Further, the indicator lights of the LED light group are arranged at equal distances, so as to conveniently indicate the total length of vehicles passing through in one cycle.

Further, the integrated box is arranged outside the road or inside the original signal lamp post.

Further, the control method of the control system includes the following steps:

1. When the green light of a lane is on, the control system calculates how long the current green light can allow vehicles to leave the stop line according to the phase duration of the green light and the speed of the vehicle at the intersection. Specifically, according to the stop line method, the traffic capacity of a straight lane in a green light in one phase period is:

In the formula, t'green is the phase _green light time (s); t _loss is the lost time during the green light time, including start-up and acceleration time; t is the average interval time _between the two vehicles before and after passing through the stop line.

The capacity of a left-turn lane is:

Among them, t _left is the average interval time between two vehicles turning right before and after passing through the stop line. t _yellow -green is the yellow-green light time dedicated to passing left-turn vehicles in a cycle, vleft is the passing speed of _left -turn vehicles in a cycle (m/s), and a' is the average acceleration of left-turn vehicles (m/s ² )

The capacity of one lane when driving straight and left:

Among them, N _Straight is the traffic capacity of a straight lane; n _Left is the proportion of left-turn vehicles, and K is the reduction coefficient.

The capacity of one lane when driving straight and right:

where nRight is the proportion of vehicles turning _right .

The value of each parameter in the above formula has a recommended range, which can be modified according to the actual situation. Assuming that the calculation shows that N vehicles can travel in a green phase under the fixed timing, by bringing in the average vehicle length and the distance between the safe fronts of the signalized intersection, it can be concluded that a green phase can allow n (m) vehicles to pass, so The first n LED lights emit green indicator light, and the rear LED lights emit red indicator light. Therefore, the driver only needs to observe whether the green light range on the lower left edge of the field of view covers himself through the rearview mirror or windshield, and then he can know the current signal light. Whether it has turned green, and whether you can pass the stop line at the current green time. In this way, the covered vehicles can start quickly, reducing the delay caused by the start of the following traffic flow. And those who are not covered can safely drive to the next parking position without rushing to follow the car, thereby reducing the occurrence of accidents.

2. When the red light of a lane lights up, all the LED light groups in the lane turn red, so that even if the driver behind cannot observe the signal light in front, he can slow down the vehicle according to the road signal prompt to prevent the driver from rushing ahead. The occurrence of rear-end collisions caused by braking.

3. During the yellow light (between red and green transitions), all the LED light groups turn yellow, which can remind the driver to pay attention to starting and braking.

From the above, in many cases, the road signal indication system can ensure that the driver can give an effective indication signal when the rear vehicle is blocked by the large vehicle in front, so that the driver can start and brake in time, which greatly improves the speed of the vehicle. Through the efficiency of signal intersections, and avoid traffic accidents caused by untimely braking, prevent property damage and casualties. In addition, the road signal indication system basically relies on the LED light group for indication, which saves a lot of electricity costs, and the device has a long life. When some lights in the light group fail to work, it has little impact on the road signal indication system.

The LED indicating device of the present invention is an LED light group laid on the ground marking line on the left side of each lane in front of the signalized intersection. It generates corresponding indicator lights according to the instruction cycle generated by the control system and the length of the vehicle allowed to pass, thereby instructing the driver to start and brake.

Compared with the prior art, the beneficial effects of the present invention are:

1. Ensure that the vehicles in the queue at the entrance of the signalized intersection will not be blocked by the large vehicles in front and cannot observe the traffic signal;

2. Provide a variety of information, which can tell whether cars in different locations should start in advance;

3. The cost is low, and the signal display uses LED light groups;

4. The signal light group is embedded underground, which has little impact on road traffic.

Description of drawings

FIG. 1 is a road signal indicating system suitable for a signal intersection provided by the present embodiment;

Fig. 2 is the front view of the LED indicating device in this embodiment;

FIG. 3 is a top view of the LED indicating device in this embodiment;

Among them: 1-integrated box, 2-solar panel, 3-LED indicating device, 4-tempered high-transparency glass, 5-LED indicator, 6-original road marking, 7-pavement layer.

Detailed ways

The present invention will be described in further detail below with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

As shown in Figure 1, a road signal indication system suitable for signal intersections includes three parts: a power supply device, a control system and an LED indication device.

The power supply device includes a solar panel 2 and a battery arranged outside the road, the solar panel 2 is connected to the battery, and the battery is connected to the control system and the LED indicating device 3; the control system and the battery are arranged in an integrated box. 1, the solar panel 2 is arranged on the upper surface of the integrated box 1; the control system is connected with the LED indicating device 3 to provide indication information for the LED indicating device 3; the LED indicating device 3 controls the The information converted by the system is displayed. The integrated box 1 is arranged outside the road or inside the original signal lamp pile.

The power supply device can be directly connected to the power supply system of the original signal light to provide power for the control system and the LED indicating device 3 .

As shown in FIG. 2 , the LED indicating device 3 includes tempered high-transparency glass 4 and a plurality of LED light groups 5. The tempered high-transparency glass 4 is arranged on the surface of each group of LED light groups, which can protect the LED indicators from being damaged, and at the same time indicate Light can penetrate glass better. The LED indicating device is embedded in the pavement marking 6 and under the pavement layer 7 so as not to hinder the vehicle from changing lanes. The road surface layer 7 is the ground.

The LED light groups are connected in parallel with each other to ensure that the failure of a single LED light group does not affect the overall indication effect.

As shown in FIG. 3 , the LED light group includes several indicator lights. The LED light groups are placed at equal distances, and the distance can be set to 1m, and can emit red, green and yellow prompt lights. It generates corresponding indicator lights according to the instruction cycle generated by the control system and the length of the vehicle allowed to pass, thereby instructing the driver to start and brake.

The control method of the control system includes the following steps:

1. When the green light of a lane is on, the control system calculates how long the current green light can allow vehicles to leave the stop line according to the phase duration of the green light and the speed of the vehicle at the intersection. Specifically, according to the stop line method, the traffic capacity of a straight lane in a green light in one phase period is:

In the formula, t'green is the phase _green light time (s); t _loss is the lost time during the green light time, including start-up and acceleration time; t is the average interval time _between the two vehicles before and after passing through the stop line.

The capacity of a left-turn lane is:

Among them, t _left is the average interval time between two vehicles turning right before and after passing through the stop line. t _yellow -green is the yellow-green light time dedicated to passing left-turn vehicles in a cycle, vleft is the passing speed of _left -turn vehicles in a cycle (m/s), and a' is the average acceleration of left-turn vehicles (m/s ² )

The capacity of one lane when driving straight and left:

Among them, N _Straight is the traffic capacity of a straight lane; n _Left is the proportion of left-turn vehicles, and K is the reduction coefficient.

The capacity of one lane when driving straight and right:

where nRight is the proportion of vehicles turning _right .

The value of each parameter in the above formula has a recommended range, which can be modified according to the actual situation. Assuming that the calculation shows that N vehicles can travel in a green phase under the fixed timing, by bringing in the average vehicle length and the distance between the safe fronts of the signalized intersection, it can be concluded that a green phase can allow n (m) vehicles to pass, so The first n LED lights emit green indicator light, and the rear LED lights emit red indicator light. Therefore, the driver only needs to observe whether the green light range on the lower left edge of the field of view covers himself through the rearview mirror or windshield, and then he can know the current signal light. Whether it has turned green, and whether you can pass the stop line at the current green time. In this way, the covered vehicles can start quickly, reducing the delay caused by the start of the following traffic flow. And those who are not covered can drive safely to the next parking position without rushing to follow the car, thereby reducing the occurrence of accidents.

4. When the red light of a lane is on, all the LED light groups of the lane turn red, so that even if the driver behind the car cannot observe the signal light in front, he can slow down the speed according to the road signal prompt to prevent the driver from rushing ahead. The occurrence of rear-end collisions caused by braking.

5. During the yellow light (between red and green transitions), all the LED light groups turn yellow, which can remind the driver to pay attention to starting and braking.

The position of each device in the system must be placed reasonably. As shown in Figure 2, the recommended lengths for each label are as follows: the groove depth L1 required for placing the LED light group is 5-10cm, which is determined by the height of the LED indicator; the groove depth L2 for placing the tempered high-transparency glass is 5cm; L3 It is the thickness of the original pavement markings. According to the national standard "Quality Requirements and Testing Methods for Road Traffic Markings" (GB/T 16311), the thicknesses of various material markings are different. Actually take 1.8mm or 2.0mm; L4 is the diameter of the tempered high-transparency glass, which is smaller than the width of the road marking, and is 10cm; L5 is the distance between the high-transparent glass and the edge of the road marking, which is determined by the width of the road marking and L4; L6 is the lane Width, according to the national standard "Urban Road Intersection Planning Specification" (GB 50647-2011), the width of each motor vehicle lane at the entrance of the intersection should not be less than 3.0m; L7 is the diameter of the road groove where the LED indicator light is placed, which should be less than L4, It is recommended to take 5 to 8cm; L8 is the distance between the indicator lights. In order to facilitate the display of the length of the allowable traffic flow, it should be taken as a whole number of meters, and the recommended value is 1m.

The above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the described embodiments, and any other changes, modifications, substitutions, and combinations made without departing from the spirit and principle of the present invention , simplification, all should be equivalent replacement modes, and are all included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a road surface signal indicating system suitable for signal intersection which characterized in that: comprises a power supply device, a control system and an LED indicating device (3); the power supply device comprises a solar cell panel (2) and a storage battery, wherein the solar cell panel (2) and the storage battery are arranged outside a road, the solar cell panel (2) is connected with the storage battery, and the storage battery is connected with the control system and the LED indicating device (3); the control system and the storage battery are arranged in the integrated box (1); the control system is connected with the LED indicating device (3) and provides indicating information for the LED indicating device (3); the LED indicating device (3) comprises indicating lamps with different colors, and information converted by the control system is displayed through the indicating lamps with different colors.

2. The road surface signal indicating system according to claim 1, characterized in that the power supply device allows direct access to the power supply system of the existing signal lamp, providing power for the control system and the LED indicating device (3).

3. The road surface signal indicating system according to claim 1, characterized in that the LED indicating device (3) comprises a plurality of LED lamp sets, and the LED lamp sets are connected in parallel with each other to ensure that the fault of a single LED lamp set does not affect the overall indicating effect.

4. The road signal indicating system of claim 3, wherein the plurality of LED light sets are respectively embedded in different lane markings to ensure that the lane change of the vehicle is not disturbed.

5. The pavement signaling system of claim 4 wherein said LED light set includes a plurality of indicator lights having three colors, red, green and yellow.

6. The road surface signal indicating system of claim 5, wherein the indicator lights of the LED light set are equidistantly arranged so as to facilitate indication of the total length of vehicles passing through in one cycle.

7. A pavement signalling system according to claim 1, characterized in that the integration box (1) is placed off-road or in an existing beacon.

8. The road surface signal indicating system according to claim 1, characterized in that the control method of the control system comprises the steps of:

1) when a green light of a certain lane is turned on, calculating the length of the vehicles allowed to leave the stop line by the current green light according to the green light phase time and the running speed of the vehicles at the intersection, specifically, according to the stop line method, the traffic capacity of a straight lane in the green light in a phase period is as follows:

of formula (II) to'_GreenIs the phase green time; t is t_{Decrease in the thickness of the steel}The lost time in the green light time comprises starting time and acceleration time; t is t_WorkshopThe average interval time of the two front and rear vehicles passing the stop line in succession;

the traffic capacity of a left-turn lane is as follows:

wherein, t_{Left side of}The average interval time of two vehicles turning front and back and right successively passing through the stop line; t is t_{Yellow green}Is a yellow-green light time dedicated to passing left-turn cars within one cycle; v. of_{Left side of}The passing speed of the left-hand vehicle in one period; a' is the average acceleration of the left-turning vehicle;

the traffic capacity of one lane when the vehicle runs in a straight and left mixed mode:

wherein N is_{Straight bar}The traffic capacity of a straight lane; n is_{Left side of}Is the proportion of the left-turning vehicle quantity; k is a reduction coefficient;

the traffic capacity of one lane when the vehicle runs in a straight and right mixed mode:

wherein n is_{Right side}Is the proportion of the right-turn vehicle amount;

2) when a red light of a certain lane is turned on, the LED lamp group of the lane is completely red, and even if a driver of a rear vehicle cannot observe a front signal lamp, the speed of the vehicle can be reduced according to a road signal prompt, so that the rear-end collision caused by sudden braking of a front vehicle is prevented;

3) and during the yellow light-red-green conversion period, the LED lamp group is totally changed into yellow, so that the purpose of reminding a driver of paying attention to starting and braking is achieved.

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