CN110629698B - Overspeed early warning prompt traffic sign board based on persistence of vision principle - Google Patents
Overspeed early warning prompt traffic sign board based on persistence of vision principle Download PDFInfo
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- CN110629698B CN110629698B CN201910967253.9A CN201910967253A CN110629698B CN 110629698 B CN110629698 B CN 110629698B CN 201910967253 A CN201910967253 A CN 201910967253A CN 110629698 B CN110629698 B CN 110629698B
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- speed limit
- limit value
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- overspeed
- traffic sign
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
- E01F9/604—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
- E01F9/608—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings for guiding, warning or controlling traffic, e.g. delineator posts or milestones
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
- E01F9/604—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
- E01F9/615—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings illuminated
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Traffic Control Systems (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
The invention discloses an overspeed early warning prompt traffic sign board based on a persistence of vision principle, which comprises a plurality of light tubes with alternate brightness and a control circuit, wherein the light tubes determine the distance between adjacent light emitting light tubes according to a variable speed limit value, and the light tubes in the distance are extinguished; when the vehicle passes the overspeed traffic sign at a speed exceeding the variable speed limit value, the driver observes the speed limit information pattern composed of the light emitting lamp. The invention uses the principle of human eye persistence of vision to enable the overspeed driving driver to watch the speed limit information and remind the driver of overspeed. The speed limit information can not be observed by the driver without overspeed, redundant information interference can not be caused to the driver without overspeed by the traffic sign board, and in addition, the traffic sign board can adapt to different speed limit values according to the actual traffic flow running condition of the road.
Description
Technical Field
The invention relates to an overspeed early warning prompt traffic sign board based on a persistence of vision principle, and belongs to the field of traffic signs.
Background
Speed limit is an important traffic management means for guaranteeing driving safety. The current speed limiting scheme mainly distributes speed limiting information to drivers in two modes: first, the traffic sign is set to inform the driver of the speed limit value of the road section. The existing traffic sign facilities release road speed limit values for all drivers running on roads, the number of speed limit signs arranged on specific road sections (such as highway tunnels) is small, reminding strength for overspeed drivers is insufficient, and redundant information interference (particularly for variable speed limit schemes) is easily generated for non-overspeed drivers by excessive speed limit signs. The second way is to issue speed limit and overspeed information to the driver via a vehicle-mounted navigation device. This approach is greatly affected by the GPS signal and the driver's personal intent to open the device.
Disclosure of Invention
The invention aims to: the overspeed early warning prompt traffic sign board based on the persistence of vision provided by the invention can remind a driver of overspeed when the vehicle speed exceeds a variable speed limit value, and can not generate redundant information interference to a driver without overspeed.
The technical scheme is as follows: the technical scheme adopted by the invention is that the overspeed early warning prompt traffic sign board based on the persistence of vision principle comprises a plurality of light tubes with alternate brightness and darkness and a control circuit, wherein the light tubes determine the distance between adjacent light-emitting light tubes according to a variable speed limit value, and the light tubes in the distance are extinguished; when the vehicle is traveling at a speed exceeding the variable speed limit value, the driver observes the speed limit information pattern composed of the light emitting tube.
The variable speed limit value is obtained by a speed limit optimization model.
The speed limiting optimization model obtains a variable speed limiting value according to the road traffic volume, the road occupancy and the average speed of the vehicle which are collected in real time, and specifically:
When the traffic volume is less than or equal to 1600pcu/h, selecting a variable speed limit value according to the occupancy; if the occupancy is less than or equal to 15%, the variable speed limit value is selected to be 100km/h; if the occupancy is greater than 15%, then it is necessary to select a variable speed limit value, in particular according to the average speed:
i) The average speed is greater than 90km/h, and the variable speed limit value is selected to be 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 to be 90km/h;
iii) The average speed is less than or equal to 80km/h, and the variable speed limit value is selected to be 80km/h;
When the traffic volume is greater than 1600pcu/h, a variable speed limit value is selected according to the average speed, in particular:
i) The average speed is greater than 90km/h, and the variable speed limit value is selected to be 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 to be 90km/h;
iii) The average speed is less than or equal to 80km/h, and the variable speed limit value is selected to be 80km/h.
The lamp tube is an LED lamp tube.
The outermost layer of the LED lamp tube is a lamp shade, a luminous body is arranged in the lamp shade, the luminous body is positioned 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.
The reflecting sheets and the backlight surface of the lampshade form an included angle of 12 degrees.
The lamp tube changes angle in the horizontal direction.
The distance between the adjacent luminous tubes is calculated by the following formula:
In the above formula, d is the distance between two luminous tubes, and v is a speed limit value.
The beneficial effects are that: the invention uses the principle of human eye persistence of vision to enable the overspeed driving driver to watch the speed limit information and remind the driver of overspeed. The speed limit information can not be observed by the driver without overspeed, redundant information interference can not be caused to the driver without overspeed by the traffic sign board, and in addition, the traffic sign board can adapt to different speed limit values according to the actual traffic flow running condition of the road. The invention is especially suitable for driving environments with weak light illumination such as tunnels and the like.
Drawings
FIG. 1 is a cross-sectional view of an LED lamp tube of the present invention;
FIG. 2 is a schematic diagram of the structure of the overspeed traffic sign of the present invention;
FIG. 3 is a schematic diagram of a speed limiting optimization model;
FIG. 4 is a schematic diagram of overspeed traffic sign laying when the variable speed limit value is 80 km/h.
Detailed Description
The present application is further illustrated in the accompanying drawings and detailed description which are to be understood as being merely illustrative of the application and not limiting of its scope, since various modifications of the application, which are equivalent to those skilled in the art, will fall within the scope of the application as defined in the appended claims after reading the application.
The embodiment comprises a plurality of LED lamp tubes and a control circuit. The sectional view of each LED lamp tube is shown in fig. 1, the outermost layer of the LED lamp tube is a lamp shade 1, and a luminous body 2 is arranged in the lamp shade. The lamp tube is positioned in the middle of the backlight surface in the lamp tube, two reflecting sheets 3 are respectively arranged on two sides of the lamp tube, and each reflecting sheet 3 forms an included angle of 12 degrees with the backlight surface of the lamp shade. The reflective sheet 3 reflects the scattered light inside the lamp housing 1 into parallel light.
As shown in fig. 2, all the LED lamps are tiled adjacent to each other in sequence to form a plane, and each LED lamp can change an angle in a horizontal direction. The bottom of the LED lamp tube is provided with a control circuit 4 for controlling the lighting and extinguishing of the corresponding lamp tube. The real-time traffic flow state is obtained through the traffic management system, then the variable speed limit value is solved according to the speed limit optimization model and is input into a preset program, and the control circuit 4 controls the lighting and extinguishing of the lamp tube through the preset program.
The speed limiting optimization model obtains a variable speed limiting value according to the road traffic volume, the road occupancy and the average speed of the vehicle, which are acquired in real time, and the specific solving 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. If the occupancy is 15% or less at this time, the variable speed limit value is selected to be 100km/h. If the occupancy is greater than 15%, then it is necessary to select a variable speed limit value, in particular according to the average speed:
i) The average speed is greater than 90km/h, and the variable speed limit value is selected to be 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 to be 90km/h;
iii) The average speed is less than or equal to 80km/h, and the variable speed limit value is selected to be 80km/h.
When the traffic volume is greater than 1600pcu/h, a variable speed limit value is selected according to the average speed, in particular:
i) The average speed is greater than 90km/h, and the variable speed limit value is selected to be 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 to be 90km/h;
iii) The average speed is less than or equal to 80km/h, and the variable speed limit value is selected to be 80km/h.
In fig. 2, some of the LED lamps are lit, but a number of LED lamps between adjacent light emitting LED lamps are still extinguished. The distance between adjacent luminous LED lamp tubes is calculated by the following formula:
in the above formula, d is the distance between two luminous tubes, and v is the speed limit value (m/s).
And finally paving an overspeed traffic sign board according to the calculated distance between the two luminous lamp tubes.
An example is given next, wherein the traffic sign board comprises 20 images, the variable speed limit value of the road is 80km/h, and the distance between adjacent luminous LED lamp tubes is calculated to be 0.4m by using the above formula. According to the width of the LED lamp tubes of 0.1m, the fact that 3 LED lamp tubes need to be extinguished is obtained, and a specific laying mode is shown in fig. 4. By utilizing the principle of 'persistence of vision', when the overspeed early warning prompt sign board enters the driving visual field and the visual range of a driver, the image of each luminous LED lamp tube is reserved for a period of time in the retina of the driver, and a plurality of images finally form a continuous and complete speed-limiting traffic sign board image. If the speed of the vehicle does not reach the speed limit value, the driver cannot observe the image of the speed limit information, and interference of redundant information is avoided.
Claims (5)
1. Overspeed early warning suggestion traffic sign based on persistence of vision principle, its characterized in that: the device comprises a plurality of light and shade alternate 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, and the light tubes in the distance are extinguished; when the vehicle is running at a speed exceeding the variable speed limit value, the driver observes a speed limit information pattern composed of the light emitting lamps;
the variable speed limit value is obtained by a speed limit optimization model;
The speed limiting optimization model obtains a variable speed limiting value according to the road traffic volume, the road occupancy and the average speed of the vehicle which are collected in real time, and specifically:
When the traffic volume is less than or equal to 1600pcu/h, selecting a variable speed limit value according to the occupancy; if the occupancy is less than or equal to 15%, the variable speed limit value is selected to be 100km/h; if the occupancy is greater than 15%, then it is necessary to select a variable speed limit value, in particular according to the average speed:
i) The average speed is greater than 90km/h, and the variable speed limit value is selected to be 100km/h;
ii) an average speed of greater than 80 km/h and less than or equal to 90 km/h, the variable speed limit value being selected to be 90 km/h;
iii) The average speed is less than or equal to 80 km/h, and the variable speed limit value is selected to be 80 km/h;
When the traffic volume is greater than 1600pcu/h, a variable speed limit value is selected according to the average speed, in particular:
i) The average speed is greater than 90km/h, and the variable speed limit value is selected to be 100km/h;
ii) an average speed of greater than 80 km/h and less than or equal to 90 km/h, the variable speed limit value being selected to be 90 km/h;
iii) The average speed is less than or equal to 80 km/h, and the variable speed limit value is selected to be 80 km/h;
the distance between the adjacent luminous tubes is calculated by the following formula:
，
In the above formula, d is the distance between two luminous tubes, and v is a speed limit value.
2. The overspeed early warning prompt traffic sign board based on the persistence of vision principle according to claim 1, wherein: the lamp tube is an LED lamp tube.
3. The overspeed early warning prompt traffic sign board based on the persistence of vision principle according to claim 2, wherein: the outermost layer of the LED lamp tube is a lamp shade (1), a luminous body (2) is arranged in the lamp shade (1), the luminous body (2) is positioned 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).
4. The overspeed early warning prompt traffic sign board based on the persistence of vision principle according to claim 3, wherein: the reflecting sheets (3) and the backlight surface of the lampshade (1) form an included angle of 12 degrees.
5. The overspeed early warning prompt traffic sign board based on the persistence of vision principle according to claim 1, wherein: the lamp tube changes angle in the horizontal direction.
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| CN111455910B (en) * | 2020-04-16 | 2021-11-23 | 东营金丰正阳科技发展有限公司 | Road protective fence |
| CN111915908B (en) * | 2020-08-07 | 2021-09-07 | 浙江方大智控科技有限公司 | Tunnel signal lamp control system and centralized controller |
| CN112695660B (en) * | 2020-12-09 | 2022-05-10 | 新疆启创荣达建设工程有限公司 | Identification device for improving road construction safety and construction method thereof |
| CN113284352A (en) * | 2021-05-21 | 2021-08-20 | 华弟安(无锡)信息科技有限公司 | Intelligent speed-limiting radar speed-measuring feedback sign |
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| CN211547454U (en) * | 2019-10-12 | 2020-09-22 | 河海大学 | Overspeed early warning and prompting traffic sign board based on visual persistence principle |
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| KR100920265B1 (en) * | 2007-12-12 | 2009-10-05 | 한국전자통신연구원 | Section speed warning device and system |
| US8711005B2 (en) * | 2010-12-27 | 2014-04-29 | Nicholas R. Musachio | Variable speed traffic control system |
| CN104008654B (en) * | 2014-04-18 | 2017-01-11 | 国通道路交通管理工程技术研究中心有限公司 | Automatic speeding illegal act sending system and method for key transportation vehicle |
| CN103956067B (en) * | 2014-04-18 | 2016-10-05 | 国通道路交通管理工程技术研究中心有限公司 | The hypervelocity of a kind of key preventive haulage vehicle causes the system and method for vehicle accident |
| CN204435250U (en) * | 2015-01-27 | 2015-07-01 | 广东省第二建筑工程公司 | A kind of municipal engineering bend corner mirror |
| JP6778128B2 (en) * | 2016-02-23 | 2020-10-28 | 首都高速道路株式会社 | Line-of-sight guide device and speed guidance system |
| CN107146434A (en) * | 2017-06-30 | 2017-09-08 | 北京中交华安科技有限公司 | Method and system for displaying speed limit information |
| KR102037592B1 (en) * | 2018-01-31 | 2019-11-27 | 현대건설주식회사 | Speed control system and method thereof in weather condition of road |
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