CN211547454U - Overspeed early warning and prompting traffic sign board based on visual persistence principle - Google Patents

Abstract

The utility model discloses an overspeed warning warning traffic sign based on the visual persistence principle, which comprises a plurality of light and dark light tubes and a control circuit, wherein the light tubes determine the distance between adjacent light-emitting light tubes according to a variable speed limit value , the lamps within this interval go out; when the vehicle passes the speeding traffic sign at a speed exceeding the variable speed limit value, the driver observes the complete speeding traffic sign consisting of luminous lamps. The utility model utilizes the visual persistence principle of the human eye, so that the speed limit information can be viewed by the speeding driver to remind the driver that the speed has been exceeded. However, drivers who are not speeding cannot observe the speed limit information. Such traffic signs will not cause redundant information interference to drivers who are not speeding. In addition, traffic signs can adapt to different speed limit values according to the actual traffic flow on the road. .

Description

A speeding warning reminder traffic sign based on visual persistence principle

technical field

The utility model relates to an overspeed warning and prompting traffic sign board based on the visual persistence principle, which belongs to the field of traffic signs.

Background technique

Speed limit is an important traffic management method to ensure driving safety. At present, the speed limit scheme mainly releases speed limit information to drivers in two ways: First, it informs drivers of the speed limit value of road sections by setting up traffic signs. At present, the existing traffic signs and signage facilities publish road speed limit values for all drivers on the road. In some specific road sections (such as highway tunnels), the number of speed limit signs is small, and the warning force for speeding drivers is insufficient. Too many speed limit signs can easily interfere with redundant information for drivers who are not speeding (especially for variable speed limit schemes). The second way is to release speed limit and overspeed information to the driver through the navigation equipment installed in the vehicle. This method is greatly influenced by the GPS signal and the driver's personal willingness to open the device.

Utility model content

Purpose of the utility model: The utility model proposes an overspeed warning warning traffic sign based on the principle of visual persistence, which reminds the driver to overspeed when the vehicle speed exceeds the variable speed limit value, and does not interfere with redundant information for drivers who are not overspeeding. .

Technical scheme: The technical scheme adopted by the present utility model is an overspeed warning warning traffic sign based on the principle of visual persistence, which includes a plurality of light and dark lamps and a control circuit, and the lamps determine the phase according to the variable speed limit value. The distance between the adjacent light-emitting lamps, the lamps within the space are extinguished; when the vehicle is running at a speed exceeding the variable speed limit value, the driver observes the speed limit information pattern composed of the light-emitting lamps.

The variable speed limit value is derived from a speed limit optimization model.

The speed limit optimization model obtains the variable speed limit value by solving the real-time collection of road traffic volume, road occupancy rate and the average speed of the vehicle, specifically:

When the traffic volume is less than or equal to 1600pcu/h, the variable speed limit value is selected according to the occupancy rate; if the occupancy rate is less than or equal to 15%, the variable speed limit value is selected as 100km/h; and if the occupancy rate is greater than 15%, the variable speed limit value is selected. Then you need to select the variable speed limit value according to the average speed, specifically:

i) The average speed is greater than 90km/h, and the variable speed limit value is selected as 100km/h;

ii) The average speed is greater than 80km/h and less than or equal to 90km/h, and the variable speed limit value is selected as 90km/h;

iii) The average speed is less than or equal to 80km/h, and the variable speed limit value is selected as 80km/h;

When the traffic volume is greater than 1600pcu/h, the variable speed limit value is selected according to the average speed, specifically:

i) The average speed is greater than 90km/h, and the variable speed limit value is selected as 100km/h;

ii) The average speed is greater than 80km/h and less than or equal to 90km/h, and the variable speed limit value is selected as 90km/h;

iii) The average speed is less than or equal to 80km/h, and the variable speed limit value is selected as 80km/h.

The lamp tube is an LED lamp tube.

The outermost layer of the LED lamp tube is a lampshade, and the lampshade is provided with a light-emitting body, the light-emitting body is located in the middle of the backlight surface of the LED lamp tube, and there are reflective sheets on both sides.

The reflective sheets all form an included angle of 12 degrees with the backlight surface of the lampshade.

The light tube changes angle in the horizontal direction.

The distance between the adjacent light-emitting lamps is calculated by the following formula:

In the above formula, d is the distance between the two light-emitting lamps, and v is the speed limit value.

Beneficial effects: The present invention utilizes the principle of human visual persistence, so that the speed limit information can be viewed by the speeding driver to remind the driver that the speed has been exceeded. However, drivers who are not speeding cannot observe the speed limit information. Such traffic signs will not cause redundant information interference to drivers who are not speeding. In addition, traffic signs can adapt to different speed limit values according to the actual traffic flow on the road. . The invention is especially suitable for the driving environment with weak lighting such as tunnels.

Description of drawings

Fig. 1 is the sectional view of the LED lamp tube of the utility model;

Fig. 2 is the structural representation of the speeding traffic sign of the utility model;

Figure 3 is a schematic diagram of the speed limit optimization model;

Figure 4 is a schematic diagram of the laying of speeding traffic signs when the variable speed limit is 80km/h.

Detailed ways

Below in conjunction with the accompanying drawings and specific embodiments, the present utility model will be further clarified. It should be understood that these embodiments are only used to illustrate the present utility model and are not intended to limit the scope of the present utility model. Various equivalent modifications of the invention are intended to fall within the scope defined by the claims appended hereto.

This embodiment includes a plurality of LED light tubes and a control circuit. The cross-sectional view of each LED tube is shown in FIG. 1 , the outermost layer of the LED tube is a lampshade 1 , and a light-emitting body 2 is arranged in the lampshade. The lamp tube is located in the middle of the backlight surface of the lamp tube, and there is a reflector 3 on each side, and the reflector 3 forms an included angle of 12 degrees with the backlight surface of the lampshade. The reflective sheet 3 reflects the scattered light in the lampshade 1 into parallel light.

As shown in Fig. 2, all the LED light tubes are tiled adjacently to form a plane, and each LED light tube can change the angle in the horizontal direction. A control circuit 4 is provided at the bottom of the LED lamp tube, which is used to control the lighting and extinguishing of the corresponding lamp tube. The real-time traffic flow state is obtained through the traffic management system, and the variable speed limit value is solved according to the speed limit optimization model and input into the predetermined program. The control circuit 4 controls the lighting and extinguishing of the lamp through the predetermined program.

The speed limit optimization model solves the variable speed limit value according to the real-time collection of road traffic volume, road occupancy rate and the average speed of vehicles. The specific solution process is shown in Figure 3.

When the traffic volume is less than or equal to 1600pcu/h, the variable speed limit value is selected according to the occupancy rate. If the occupancy rate is less than or equal to 15% at this time, the variable speed limit value is selected as 100km/h. If the occupancy rate is greater than 15%, the variable speed limit value needs to be selected according to the average speed, specifically:

i) The average speed is greater than 90km/h, and the variable speed limit value is selected as 100km/h;

ii) The average speed is greater than 80km/h and less than or equal to 90km/h, and the variable speed limit value is selected as 90km/h;

iii) The average speed is less than or equal to 80km/h, and the variable speed limit value is selected as 80km/h.

When the traffic volume is greater than 1600pcu/h, the variable speed limit value is selected according to the average speed, specifically:

i) The average speed is greater than 90km/h, and the variable speed limit value is selected as 100km/h;

ii) The average speed is greater than 80km/h and less than or equal to 90km/h, and the variable speed limit value is selected as 90km/h;

iii) The average speed is less than or equal to 80km/h, and the variable speed limit value is selected as 80km/h.

In FIG. 2 , some of the LED tubes are turned on, but several LED tubes between adjacent LED tubes are still turned off. The spacing between adjacent light-emitting LED tubes is calculated by the following formula:

In the above formula, d is the distance between the two light-emitting lamps, and v is the speed limit value (m/s).

Finally, lay the speeding traffic signs according to the distance between the two light-emitting lamps calculated above.

Next, a calculation example is given. The traffic sign includes 20 images, and the variable speed limit of the road is 80km/h. Using the above formula, the distance between adjacent LED lamps is calculated to be 0.4m. According to the width of the LED tube of 0.1m, it is concluded that 3 LED tubes need to be extinguished. The specific laying method is shown in Figure 4. Using the principle of "visual persistence", when the speeding warning signs enter the driver's driving field of vision and vision, the image of each LED light tube will remain in the driver's retina for a period of time, and multiple images will eventually be formed. A continuous and complete image of a speed limit traffic sign. However, if the vehicle speed does not reach the speed limit value, the driver cannot observe the image of the speed limit information, which avoids the interference of redundant information.

Claims (8)

1. The utility model provides an overspeed early warning suggestion traffic sign board based on persistence of vision principle which characterized in that: the lamp tube is characterized by comprising a plurality of lamp tubes with alternate light and shade and a control circuit, wherein the lamp tubes determine the space between the adjacent luminous lamp tubes according to the variable speed limit value, and the lamp tubes in the space are extinguished; when the vehicle is traveling at a speed exceeding the variable speed limit, the driver observes the speed limit information pattern composed of the luminous tubes.

2. The overspeed warning prompting traffic sign board based on persistence of vision principle of claim 1, characterized in that: the variable speed limit value is obtained by a speed limit optimization model.

3. The overspeed warning prompting traffic sign board based on persistence of vision principle of claim 2, characterized in that: the speed limit optimization model is used for solving according to the road traffic volume, the road occupancy and the average speed of the vehicle, which are acquired in real time, to obtain a variable speed limit value, and specifically:

when the traffic volume is less than or equal to 1600pcu/h, selecting a variable speed limit value according to the occupancy rate; if the occupancy is less than or equal to 15%, selecting 100km/h for the variable speed limit value; and if the occupancy is more than 15%, then the variable speed limit value needs to be selected according to the average speed, specifically:

i) the average speed is greater than 90km/h, and the variable speed limit value is selected to be 100 km/h;

ii) the average speed is more than 80km/h and less than or equal to 90km/h, and the variable speed limit value is selected to be 90 km/h;

iii) the average speed is less than or equal to 80km/h, and the variable speed limit value is selected to be 80 km/h;

when the traffic volume is larger than 1600pcu/h, selecting a variable speed limit value according to the average speed, specifically:

i) the average speed is greater than 90km/h, and the variable speed limit value is selected to be 100 km/h;

ii) the average speed is more than 80km/h and less than or equal to 90km/h, and the variable speed limit value is selected to be 90 km/h;

iii) the average speed is less than or equal to 80km/h, and the variable speed limit value is selected to be 80 km/h.

4. The overspeed warning prompting traffic sign board based on persistence of vision principle of claim 1, characterized in that: the lamp tube is an LED lamp tube.

5. The overspeed warning prompting traffic sign board based on persistence of vision principle of claim 4, characterized in that: the outermost layer of the LED lamp tube is a lampshade (1), a luminous body (2) is arranged in the lampshade (1), the luminous body (2) is located in the middle of the backlight surface in the LED lamp tube, and two sides of the luminous body are respectively provided with a reflecting sheet (3).

6. The overspeed warning prompting traffic sign board based on persistence of vision principle of claim 5, characterized in that: the reflector (3) and the backlight surface of the lampshade (1) form an included angle of 12 degrees.

7. The overspeed warning prompting traffic sign board based on persistence of vision principle of claim 1, characterized in that: the lamp tube changes the angle in the horizontal direction.

8. The overspeed warning prompting traffic sign board based on persistence of vision principle of claim 1, characterized in that: the distance between the adjacent luminous tubes is calculated by the following formula:

in the above formula, d is the distance between two light-emitting lamp tubes, and v is the speed limit value.

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