CN106530771B - Traffic guidance device and method for active luminous delineator of highway - Google Patents

Traffic guidance device and method for active luminous delineator of highway Download PDF

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CN106530771B
CN106530771B CN201710005237.2A CN201710005237A CN106530771B CN 106530771 B CN106530771 B CN 106530771B CN 201710005237 A CN201710005237 A CN 201710005237A CN 106530771 B CN106530771 B CN 106530771B
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delineator
induction
active
geomagnetic sensor
emitting
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CN106530771A (en
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包兴臣
房培阳
孟强
吴靖
王延锋
王刚
孔祥国
王丹
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Shandong Provincial Communications Planning and Design Institute Group Co Ltd
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Shandong Provincial Communications Planning and Design Institute Group Co Ltd
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/065—Traffic control systems for road vehicles by counting the vehicles in a section of the road or in a parking area, i.e. comparing incoming count with outgoing count

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  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Traffic Control Systems (AREA)

Abstract

The embodiment of the invention discloses a traffic guidance device and a traffic guidance method for an active luminous delineator on a highway, which comprises a geomagnetic sensor group, a plurality of active luminous delineators, a data processing terminal and a delineator gateway node, wherein the geomagnetic sensor group is connected with the data processing terminal; the geomagnetic sensor group comprises a first geomagnetic sensor and a second geomagnetic sensor; the data processing terminal is arranged in the middle section of the vehicle driving induction area; the data processing terminal is in wired communication connection with each geomagnetic sensor group; the data processing terminal is in wired communication connection with the delineator gateway node; the active luminous delineator is in wireless communication connection with the data processing terminal through the delineator gateway node and is in wireless communication connection with each other. Through increase LED luminescent device on traditional contrary reflective delineator, cooperation earth magnetism sensor group, can accurately judge traffic induction opportunity, in time through the mode that initiative is luminous and passive reflection combines together, realize easily sending out, the safe induction and the detection of blocking up in the abominable region of traffic environment to the accident, effectively improve traffic induction effect.

Description

Traffic guidance device and method for active luminous delineator on highway
Technical Field
The invention relates to the technical field of traffic guidance, in particular to an active luminous delineator traffic guidance device and method for a highway.
Background
The traffic safety facilities are the general names of facilities such as guardrails, sign lines and the like arranged along the road in order to ensure the safety of driving and pedestrians, beautify road landscape and fully play the role of the road. With the continuous development of new processes and new materials, the varieties and the performances of safety facilities are continuously improved, and the visibility, the durability and the visibility of the safety facilities are continuously improved. The delineator is a safety inducing facility arranged along the direction of a main line of an expressway road and is used for displaying a road boundary contour and guiding vehicles to safely run. The delineator can be classified into an attached type and a free-standing type according to the mounting method.
The vehicle running speed is high in the expressway and the first-level expressway, and the linear indication in the front of the expressway is very important. During the driving process of the vehicle at night, the visible distance is too short, and the driving safety is reduced to a great extent. At present general contrary reflective delineator adopts and sets up the reflective membrane on the delineator, reaches the warning purpose through the contrary reflection to the vehicle that traveles shines light. The reflecting brightness of the retro-reflecting delineator is only about 300-400mcd, and the optimal reflecting effect is difficult to achieve under the condition that a driver does not drive a high beam vehicle lamp or the light is dark. In addition, since the reflective film is likely to be deteriorated after long-term use and the reflective function is lowered, the function of guiding the delineator is lowered to some extent. Especially in rainy and foggy days or turning positions with small route curvature, the reflection brightness of the retro-reflective delineator is lower, the requirement of a driver for distinguishing the route trend is difficult to meet, and the potential safety hazard of driving at night or in rainy days is increased. Therefore, how to effectively and reliably induce traffic is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a traffic guidance device and method for an active luminous delineator of a highway, and aims to solve the problem of poor traffic guidance effect in the prior art.
In order to solve the technical problem, the embodiment of the invention discloses the following technical scheme:
the embodiment of the invention provides a traffic guidance device for active luminous delineators on a highway, which comprises geomagnetic sensor groups arranged on all lanes, a plurality of active luminous delineators arranged at two sides of a vehicle driving guidance area, a data processing terminal and a delineator gateway node, wherein:
the geomagnetic sensor group comprises a first geomagnetic sensor and a second geomagnetic sensor, the first geomagnetic sensor is arranged at an entrance position of the vehicle running induction area, and the second geomagnetic sensor is arranged at an exit position of the vehicle running induction area;
the data processing terminal is arranged in the middle section of the vehicle driving induction area; the data processing terminal is in wired communication connection with the first geomagnetic sensor and the second geomagnetic sensor in each geomagnetic sensor group; the data processing terminal is in wired communication connection with the delineator gateway node;
the active light-emitting delineators are in wireless communication connection with the data processing terminal through the delineator gateway nodes, and adjacent active light-emitting delineators are in wireless communication connection.
Optionally, the first geomagnetic sensor, the active light-emitting delineator and the second geomagnetic sensor are sequentially arranged along a driving direction, and a first distance exists between the first geomagnetic sensor and the corresponding nearest active light-emitting delineator and between the second geomagnetic sensor and the corresponding nearest active light-emitting delineator; the first distance is a distance calculated according to the driving speed, the reaction time and the resistance coefficient.
Optionally, the data processing terminal includes an illumination sensor, a temperature and humidity sensor, and a visibility sensor.
Optionally, the wireless transmission power of the active light-emitting delineator is calculated according to a wireless broadcast distance of the active light-emitting delineator, a center frequency of the wireless radio frequency signal, and a receiving sensitivity.
Optionally, the active light emitting delineator comprises a left active light emitting delineator device and a right active light emitting delineator device distinguished according to installation position, wherein:
the left active light-emitting delineator and the right active light-emitting delineator both comprise an LED light-emitting device and a retro-reflective film; the LED light-emitting devices are all arranged on the periphery of the retro-reflecting reflective film;
a circle of white LED light-emitting devices and a circle of yellow LED light-emitting devices which are equal in number are uniformly distributed at intervals on the periphery of the right active light-emitting outline marker, and the white LED light-emitting devices and the yellow LED light-emitting devices are respectively and independently controlled;
and a circle of yellow LED light-emitting devices are uniformly distributed on the periphery of the left active light-emitting delineator, and the number of the yellow LED light-emitting devices is equal to that of the yellow LED light-emitting devices in the right active light-emitting delineator.
Optionally, when the lane in the vehicle driving induction region is a curved lane, the first geomagnetic sensor is disposed at a position close to an outer edge of the curved lane, and the second geomagnetic sensor is disposed at a position close to an inner edge of the curved lane.
The embodiment of the invention also provides a traffic induction method for the active luminous delineator on the highway, which comprises the following steps:
counting traffic flow data information of a vehicle driving induction area, wherein the traffic flow data information at least comprises the number of vehicles in the vehicle driving induction area;
acquiring environmental information of a vehicle driving induction area, wherein the environmental information at least comprises a visibility value acquired by a visibility sensor, a temperature and humidity value acquired by a temperature and humidity sensor and an illumination intensity value acquired by an illumination sensor;
judging whether to control the active light-emitting delineator to emit light or not according to the traffic flow data information and the environmental information;
if so, sending an execution command to the active luminous delineators in the multiple circulation induction intervals, wherein the execution command at least carries the induction starting delineator device identification number corresponding to each circulation induction interval and the reverse flowing water circulation period in the circulation induction intervals; controlling the active light-emitting outline mark in each circulation induction interval to emit light in the reverse running direction with a reverse running water circulation period according to the execution command;
if not, controlling the active light-emitting delineator to be in standby.
Optionally, the statistical traffic flow data information of the vehicle driving induction area includes:
initializing traffic flow data information;
determining an identification number of an induction area according to an identification number of a first geomagnetic sensor triggered by a vehicle;
when a trigger signal of the first geomagnetic sensor is received, increasing the number of vehicles corresponding to the induction area identification number;
and when a trigger signal of a second geomagnetic sensor is received, reducing the number of vehicles corresponding to the induction area identification number.
Optionally, determining whether to control the active lighting delineator to emit light according to the traffic flow data information and the environment information, including:
judging whether the corresponding numerical values are smaller than corresponding preset threshold values or not according to the priority sequence of the visibility values, the temperature and humidity values and the illumination intensity values;
if so, when the number of vehicles in the vehicle driving induction area is greater than or equal to 1, determining that the active light-emitting delineator needs to be controlled to emit light.
Optionally, the method further comprises:
calculating the actual inter-vehicle distance in the vehicle driving induction area according to the number of vehicles in the vehicle driving induction area in the traffic flow data information and the distance between the geomagnetic sensor groups corresponding to the vehicle driving induction area;
when the actual distance between vehicles is smaller than a first critical distance, generating conventional traffic jam information;
when the actual distance between vehicles is smaller than a second critical distance, generating emergency traffic jam information; wherein the second critical vehicle distance is smaller than the first critical vehicle distance;
and sending the conventional traffic jam information or the emergency traffic jam information to a remote control center.
According to the technical scheme, the traffic guidance device and the traffic guidance method for the active luminous delineators on the expressway provided by the embodiment of the invention comprise geomagnetic sensor groups arranged on all lanes, a plurality of active luminous delineators arranged at two sides of a vehicle driving guidance area, a data processing terminal and delineator gateway nodes; the geomagnetic sensor group comprises a first geomagnetic sensor and a second geomagnetic sensor, the first geomagnetic sensor is arranged at an entrance position of the vehicle running induction area, and the second geomagnetic sensor is arranged at an exit position of the vehicle running induction area; the data processing terminal and the delineator gateway node are both arranged in the middle section of the vehicle driving induction area; the data processing terminal is in wired communication connection with the first geomagnetic sensor and the second geomagnetic sensor in each geomagnetic sensor group; the data processing terminal is in wired communication connection with the delineator gateway node; the active light-emitting delineators are in wireless communication connection with the data processing terminal through the delineator gateway nodes, and adjacent active light-emitting delineators are in wireless communication connection. The LED light-emitting device is additionally arranged on the traditional retro-reflection outline marker, the geomagnetic sensor group is matched, the traffic guidance time can be accurately judged, and the safety guidance and the congestion detection of vehicles in areas with easy accident occurrence, severe traffic environment and the like are realized by combining the active light-emitting and passive reflection when the traffic guidance is needed, so that the traffic guidance effect is effectively improved; moreover, the device has the advantages of strong external interference resistance, simple equipment, low cost, accurate detection and easy system maintenance, reduces the complexity of data processing, improves the traffic detection speed, can play an auxiliary role in traffic management, and realizes the quick acquisition and accurate monitoring of road condition information.
Drawings
In order to more clearly illustrate the embodiments or prior art solutions of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic view of an application scenario of an active light-emitting delineator traffic guidance device for a highway according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an active light-emitting traffic guidance device for a highway delineator according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a data processing terminal according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an active light-emitting delineator according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an outline marker gateway node according to an embodiment of the present invention;
fig. 6 is a schematic flow chart of a traffic guidance method for an active luminous delineator on a highway according to an embodiment of the present invention;
FIG. 7 is a flow chart of a traffic flow data information statistical method according to an embodiment of the present invention;
fig. 8 is a schematic flowchart of an active light-emitting delineator light-emitting determination method according to an embodiment of the present invention;
fig. 9 is a schematic flow chart of another traffic guidance method for an active luminous delineator on a highway according to an embodiment of the invention;
FIG. 10 is a traffic flow statistics line graph according to an embodiment of the present invention;
FIG. 11 is a schematic view of a simulation of a congestion scene provided by an embodiment of the invention;
the symbols of fig. 1 to 5 are represented as:
1-geomagnetic sensor group, 11-first geomagnetic sensor, 12-second geomagnetic sensor, 110-geomagnetic sensing module, 111-geomagnetic sensing relay module, 112-geomagnetic sensing sending module, 2-active light-emitting delineator, 211-delineator body, 212-second data processor, 213-LED light-emitting device, 214-first wireless transceiver module, 215-second solar panel module, 216-second lithium battery, 217-second self-locking switch, 3-data processing terminal, 311-first data processor, 312-first RS232 bus module, 313-first RS485 bus module, 314-first solar panel module, 315-first lithium battery, 316-illumination sensor, 317-temperature and humidity sensor, 318-visibility sensor, 319-timer module, 320-first self-locking switch, 4-delineator gateway node, 411-third data processor, 412-second RS232 bus module, 413-second wireless transceiver module, 414-third solar panel module, 415-third self-locking switch, 416-third lithium battery self-locking switch.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
In the embodiment of the present invention, the structure of the highway active luminous delineator traffic guidance device is described in detail by taking an application scenario of two-way and two-lane as an example, but it should be noted that the highway active luminous delineator traffic guidance device provided in the embodiment of the present invention may also be applied to roads such as two-way four-lane, two-way six-lane, or one-way lane.
Referring to fig. 1, which is a schematic view of an application scenario of an active light-emitting delineator traffic guidance device for a highway according to an embodiment of the present invention, as shown in fig. 1, the device includes a geomagnetic sensor group 1 disposed on each lane, a plurality of active light-emitting delineators 2 disposed on two sides of a vehicle driving guidance area, a data processing terminal 3, and a delineator gateway node 4.
The geomagnetic sensor group 1 includes a first geomagnetic sensor 11 and a second geomagnetic sensor 12. The positions of the first geomagnetic sensor 11 and the second geomagnetic sensor 12 are respectively taken as road vertical lines, a one-way driving area consisting of the two vertical lines, one side of a main line of the expressway and a central division belt is taken as a single vehicle driving induction area, and the expressway driving induction area is divided into an uplink vehicle driving induction area and a downlink vehicle driving induction area by the central division belt.
The data processing terminal 3 is disposed in the middle section of the vehicle driving induction area, as shown in fig. 1, the data processing terminal 3 is disposed in the central separation zone of the highway and located in the middle section of the vehicle driving induction area, so that the geomagnetic sensor group 1 and the active light-emitting delineator 2 in the up vehicle driving induction area and the down vehicle driving induction area can share the data processing terminal 3. The data processing terminal 3 is connected in wired communication with both the first geomagnetic sensor 11 and the second geomagnetic sensor 12 in each geomagnetic sensor group 1. In the embodiment of the present invention, the data processing terminal 3 may be a computer device such as an upper computer, a server, and a computer.
The delineator gateway node 4 is also disposed in the middle of the vehicle driving induction area, so that the geomagnetic sensor group 1 and the active light-emitting delineator 2 in the uplink vehicle driving induction area and the downlink vehicle driving induction area can share the delineator gateway node 4 to communicate with the data processing terminal 3. The delineator gateway node 4 is connected with the data processing terminal 3 in a wired communication mode. The delineator gateway node 4 may be understood as a router or the like that configures various wireless and wired communication modules.
The active luminous delineators 2 are in wireless communication connection with the data processing terminal 3 through the delineator gateway node 4, and adjacent active luminous delineators 2 are in wireless communication connection.
Referring to fig. 2, which is a schematic structural diagram of an active luminous delineator traffic guidance apparatus for an expressway according to an embodiment of the present invention, as shown in fig. 2, the first geomagnetic sensor 11 and the second geomagnetic sensor 12 in each geomagnetic sensor group 1 have the same structure, and specifically, each of the first geomagnetic sensor 11 and the second geomagnetic sensor 12 includes a geomagnetic sensing module 110, a geomagnetic sensing relay module 111, and a geomagnetic sensing transmission module 112. The geomagnetic induction module 110, the geomagnetic sensing relay module 111, and the geomagnetic sensing transmission module 112 are cascaded in a short-distance wireless communication manner, and the geomagnetic sensing transmission module 112 is connected to the data processing terminal 3 through an RS485 bus. The distance between the geomagnetic sensing and sending module 112 and the data processing terminal 3 should be smaller than the transmission distance of the RS485 bus. The first geomagnetic sensor 11 is disposed at an entrance position of the vehicle travel guidance area, and the second geomagnetic sensor 12 is disposed at an exit position of the vehicle travel guidance area. Specifically, the geomagnetic sensing module 110 of the first geomagnetic sensor 11 is disposed in the middle of the lane and at an entrance of the vehicle driving guidance area, and the geomagnetic sensing relay module 111 and the geomagnetic sensing transmission module 112 are disposed at overhead positions such as roadside lamp posts corresponding to the entrance of the vehicle driving guidance area. The geomagnetic sensing module 110 of the second geomagnetic sensor 12 is also disposed in the middle of the lane and located at an exit position of the vehicle driving guidance area, and the geomagnetic sensing relay module 111 and the geomagnetic sensing transmission module 112 corresponding to the geomagnetic sensor 12 are disposed at overhead positions such as roadside lampposts corresponding to the exit of the vehicle driving guidance area. Furthermore, making a perpendicular road along the geomagnetic sensing module 110 of the first geomagnetic sensor 11 may be understood as a start induction trigger line of a vehicle driving induction area, and similarly, making a perpendicular road along the geomagnetic sensing module 110 of the second geomagnetic sensor 12 may be understood as an end induction trigger line of a vehicle driving induction area.
The data processing terminal 3 can be in communication connection with a remote control center through a wireless data transmission module and sends related data information to the remote control center; the remote control center further stores the corresponding data information into a data storage module such as a hard disk or a hard disk storage array for subsequent analysis, review and use. Referring to fig. 3, which is a schematic structural diagram of a data processing terminal according to an embodiment of the present invention, as shown in fig. 3, the data processing terminal 3 includes a first data processor 311, a first RS232 bus module 312, a first RS485 bus module 313, a first solar panel module 314, a first lithium battery 315, an illumination sensor 316, a temperature and humidity sensor 317, a visibility sensor 318, a timer module 319, and a first self-locking switch 320, where the first RS232 bus module 312, the first RS485 bus module 313, and the first solar panel module are electrically connected to the first data processor 311. Wherein, the data processing terminal 3 communicates with the delineator gateway node 4 through the first RS232 bus module 312; the data processing terminal 3 communicates with the first geomagnetic sensor 11 and the second geomagnetic sensor 12 through the first RS485 bus module 313. The first solar panel module 314 and the first lithium battery 315 can provide power for the data processing terminal 3, and ensure normal power supply of the data processing terminal 3. The illumination sensor 316 is used for acquiring illumination intensity of the vehicle driving induction area, the temperature and humidity sensor 317 is used for acquiring temperature values and humidity values of the vehicle driving induction area, so that whether road icing occurs in the vehicle driving induction area is further judged, and the visibility sensor 318 is used for acquiring visibility conditions of the vehicle driving induction area. The timer module 319 is used for timing the vehicle entering the vehicle driving induction area. The first self-locking switch 320 can facilitate a technician to open or close the data processing terminal 3, so as to facilitate maintenance, hardware upgrade, and the like of the data processing terminal 3.
Referring to fig. 4, which is a schematic structural diagram of an active light-emitting delineator according to an embodiment of the present invention, the active light-emitting delineator 2 includes a delineator body 211, a second data processor 212, an LED light-emitting device 213, a first wireless transceiver module 214, a second solar panel module 215, a second lithium battery 216, and a second self-locking switch 217; the delineator body 211 does the shell structure of the active light-emitting delineator 2, still be provided with contrary reflective membrane on the delineator body 211, contrary reflective membrane adopts V class reflective membrane, and the contrary reflective membrane of following the left contrary reflective membrane of traffic direction road can set up to yellow, and the contrary reflective membrane of road right side can set up to white. The LED light-emitting device 213, the first wireless transceiver module 214, the second solar panel module 215, the second lithium battery 216 and the second self-locking switch 217 are electrically connected with the second data processor 212; the LED light emitting device 213 may use a light emitting device having a circular structure, and the LED light emitting device 213 is attached to the outer periphery of the retro-reflective film on the delineator body 211. The active luminous delineator 2 is in communication connection with the data processing terminal 3 through a delineator gateway node 4, the delineator gateway node 4 receives a control instruction issued by the data processing terminal 3, broadcasts the control instruction to other active luminous delineators 2 in a short-distance wireless communication mode, and the active luminous delineators 2 execute corresponding reverse flowing water luminous induction actions.
In order to improve the inducing effect, the embodiment of the present invention further optimizes the setting of the light-emitting delineator, specifically, the active light-emitting delineator 2 is divided into two types, i.e., a left active light-emitting delineator and a right active light-emitting delineator, according to the installation position, the left active light-emitting delineator is an active light-emitting delineator arranged on the left side of the road along the driving direction, and the right active light-emitting delineator is an active light-emitting delineator arranged on the right side of the road along the driving direction. The left active light-emitting delineator and the right active light-emitting delineator both comprise an LED light-emitting device 213 and a retro-reflective film; the LED light emitting devices 213 are all disposed at the periphery of the retro-reflective film. A circle of white LED light-emitting devices and a circle of yellow LED light-emitting devices which are equal in number are uniformly distributed at intervals on the periphery of the right active light-emitting outline marker, and the white LED light-emitting devices and the yellow LED light-emitting devices are respectively and independently controlled; and a circle of yellow LED light-emitting devices are uniformly distributed on the periphery of the left active light-emitting outline marker, and the number of the yellow LED light-emitting devices is equal to that of the yellow LED light-emitting devices in the right active light-emitting outline marker.
For facilitating information interaction between the data processing terminal 3 and each active light-emitting delineator 2, refer to fig. 5, which is a schematic structural diagram of a delineator gateway node provided in an embodiment of the present invention, as shown in fig. 5, the delineator gateway node 4 includes a third data processor 411, a second RS232 bus module 412, a second wireless transceiver module 413, a third solar panel module 414, a third lithium battery 415, and a third self-locking switch 416, which are electrically connected to the third data processor 411. Wherein, the delineator gateway node 4 communicates with the data processing terminal 3 through the second RS232 bus module 412; the delineator gateway node 4 wirelessly communicates with the nearby active light-emitting delineator 2 in a short distance through the second wireless transceiver module 413; the third solar panel module 414 and the third lithium battery 415 provide power for the delineator gateway node 4; the third self-locking switch 416 is used for turning on or off the delineator gateway node 4, so that hardware upgrade and maintenance of the delineator gateway node 4 are facilitated.
In addition, in order to further improve the induction effect of the traffic induction device for the active luminous delineator on the highway, the embodiment of the invention optimizes the arrangement mode of the traffic induction device for the active luminous delineator on the highway.
Specifically, as shown in fig. 1, taking an a-B lane as an example, the driving direction is from a to B, a first geomagnetic sensor 11, an active light-emitting contour marker 2, and a second geomagnetic sensor 12 are sequentially arranged along the driving direction, and along the driving direction, the first geomagnetic sensor 11 is closest to the active geomagnetic sensor 11The luminous delineator 2, the second geomagnetic sensor 12 and the nearest active luminous delineator 2 are all provided with a first distance D c (ii) a And the first distance D c The distance is calculated based on the travel speed, the reaction time and the resistance coefficient. The first distance D c The calculation formula of (a) is as follows:
Figure BDA0001202880600000081
wherein v is the driving speed (km/h), t is the reaction time (generally, the judgment time is 1.5s, the braking reaction time is 1.0 s), g is the gravity acceleration, f is the braking reaction time 1 The road resistance coefficient of the adhesion system between the road surface and the tire.
The active luminous delineators 2 are attached to the corrugated beam guardrail plate, and the distance between every two adjacent active luminous delineators 2 is set according to the type of lanes in a vehicle driving induction area. In the concrete implementation, for a linear route, the active luminous delineator is provided with a distance D of 2 paths l The number of the active luminous delineators is 32m, namely, one active luminous delineator 2 is arranged at each interval of 32m on a straight line section; for a curved lane or ramp, the spacing between the active lighting delineators 2 is determined according to the curve radius, specifically, for different curve radii, D, as shown in table 1 l Respectively take the value D l ＝8/12/16/32m。
Table 1 is as follows:
radius of curvature (m) ≤89 90-179 180-274 275-374 ≥375
Setting interval (m) 8 12 16 24 32
Furthermore, in order to communicate to the adjacent active lighting delineators 2, it is necessary that the active lighting delineators 2 have a radio broadcasting distance greater than 1/2 of the distance between the adjacent active lighting delineators 2, i.e. that
Figure BDA0001202880600000082
In addition, when the number of lanes in the vehicle driving induction area is large or too wide, the right active light-emitting delineator 2 may be far away from the data processing terminal 3, and in order to ensure that all the active light-emitting delineators in the vehicle driving induction area can be in communication connection with the data processing terminal 3, in the embodiment of the present invention, the transmission power of the delineator gateway node 4 may be increased, thereby ensuring that the data processing terminal 3 can communicate with at least one right active light-emitting delineator 2 through the delineator gateway node 4, and the at least one active light-emitting delineator 2 is further in communication with other right active light-emitting delineators 2.
Wherein R is b Solving the estimation by a simplified free space propagation model of the wireless signal:
S r ＝10log(P t )-(32.44+10log((1000·R b ) 2 )+20log(F c ))，
log in the formula is the logarithm to the base 10, P t The wireless emission power of the active luminous delineator is calculated and obtained in mW, R b The active light-emitting delineator is a wireless broadcast distance with the unit of m,F c the center frequency of the wireless radio frequency signal of the active luminous delineator is in MHz and S r The receive sensitivity of the active light delineator is in dBm. At known active luminous delineator wireless broadcast distance
Figure BDA0001202880600000091
Center frequency F of radio frequency signal c And a reception sensitivity S r Under the condition of (2), the wireless transmitting power P can be obtained through solving t Thereby reducing the output power consumption of the active lighting delineator 2.
The data processing terminal 3 is installed at the central division belt of the vehicle driving induction area, and the distances between the data processing terminal and the first geomagnetic sensor 11 and the second geomagnetic sensor 12 at the two ends of the vehicle driving induction area are D s ＝D q And 2, the vehicle driving induction areas on the two sides of the central division belt share the same data processing terminal 3. The delineator gateway node 4 may also be disposed at the same position of the data processing terminal 3, that is, the delineator gateway node 4 may also be disposed at a central division zone of the vehicle driving induction area, and distances between the first geomagnetic sensor 11 and the second geomagnetic sensor 12 at two ends of the vehicle driving induction area are D s ＝D q And 2, the vehicle driving induction areas on the two sides of the central separator share the same outline marker gateway node 4 to communicate with the data processing terminal 3.
In addition, in specific implementation, in order to improve the acquisition efficiency of the geomagnetic sensor group 1, the embodiment of the present invention further optimizes the setting manner of the geomagnetic sensor group 1. Specifically, when the lane in the vehicle driving induction area is a curved lane, the first geomagnetic sensor 11 is disposed at a position close to the outer edge of the curved lane, and the second geomagnetic sensor 12 is disposed at a position close to the inner edge of the curved lane; the outer edge of the curved lane may be understood as an edge far from a circle center corresponding to the curve, and the inner edge of the curved lane may be understood as an edge close to the circle center corresponding to the curve. Through the asymmetrical arrangement, the driving track in the vehicle curve can be accurately matched, and the information of the vehicle entering and exiting the driving induction area can be effectively acquired.
As can be seen from the description of the above embodiments, the traffic guidance device for the active luminous delineator on the expressway provided by the embodiment of the present invention includes a geomagnetic sensor group 1 disposed on each lane, a plurality of active luminous delineators 2 disposed on both sides of a vehicle driving guidance area, a data processing terminal 3, and a delineator gateway node 4; the geomagnetic sensor group 1 comprises a first geomagnetic sensor 11 and a second geomagnetic sensor 12, wherein the first geomagnetic sensor 11 is arranged at an entrance position of the vehicle driving induction area, and the second geomagnetic sensor 12 is arranged at an exit position of the vehicle driving induction area; the data processing terminal 3 and the delineator gateway node 4 are both arranged in the middle section of the vehicle driving induction area; the data processing terminal 3 is connected with the first geomagnetic sensor 11 and the second geomagnetic sensor 12 in each geomagnetic sensor group 1 in a wired communication manner; the data processing terminal 3 is in wired communication connection with the delineator gateway node 4; the active luminous delineators 2 are in wireless communication connection with the data processing terminal 3 through the delineator gateway node 4, and adjacent active luminous delineators 2 are in wireless communication connection. By adding the LED light-emitting device 213 on the traditional retro-reflection outline marker and matching with the geomagnetic sensor group 1, the traffic guidance opportunity can be accurately judged, and the safety guidance and congestion detection of vehicles in areas with easy accident occurrence, severe traffic environment and the like can be realized by combining active light-emitting and passive reflection when traffic guidance is needed, so that the traffic guidance effect is effectively improved; moreover, the device has the advantages of strong external interference resistance, simple equipment, low cost, accurate detection and easy system maintenance, reduces the complexity of data processing, improves the traffic detection speed, can play an auxiliary role in traffic management, and realizes the rapid acquisition and accurate monitoring of road condition information.
Corresponding to the embodiment of the traffic guidance device for the active luminous delineator on the highway provided by the invention, the invention also provides a traffic guidance method for the active luminous delineator on the highway, referring to fig. 6, which is a schematic flow chart of the traffic guidance method for the active luminous delineator on the highway provided by the embodiment of the invention, and as shown in fig. 6, the traffic guidance method by using the traffic guidance device for the active luminous delineator on the highway comprises the following steps:
step S101: and counting traffic flow data information of the vehicle driving induction area, wherein the traffic flow data information at least comprises the number of vehicles in the vehicle driving induction area.
Referring to fig. 7, which is a schematic flow chart of a traffic flow data information statistical method according to an embodiment of the present invention, as shown in fig. 7, the method includes the following steps:
step S1011: traffic flow data information is initialized.
In the embodiment of the present invention, the traffic flow data information is recorded using the data structure as shown in table 2. For a bidirectional double lane, the data structure is formed by two records into a data table T; of course, it should be noted that the data table T may include any number of records according to different implementation situations, and is not limited in the embodiment of the present invention. Each record is composed of 6 data items, and specifically includes a guidance area identification number (Yid), the number of vehicles (n) in the guidance area at the current time, the total number of vehicles (count) passing through the guidance area in the statistical time period, vehicle driving direction information (dir), a vehicle driving-in timestamp (start time), and a vehicle driving-out timestamp (end time). Table T data results table 2 shows that table T is initialized, and the data entries of each record in data table T are initialized to null.
Table 2:
Yid n count dir starttime endtime
※ ※ ※ ※ ※ ※
※ ※ ※ ※ ※ ※
step S1012: and determining an identification number of the induction area according to the identification number of the first geomagnetic sensor triggered by the vehicle.
When a vehicle enters a vehicle driving induction area, the geomagnetic induction module 110 embedded at a trigger line starts to induce to generate vehicle driving information, the vehicle driving information is transmitted to the geomagnetic sensing sending module 112 through the geomagnetic sensing relay module 111, and is transmitted to the data processing terminal 3 through the RS485 bus, so that the meter T is dynamically maintained:
creating a record operation: after the data processing terminal 3 receives the information that the vehicle enters and is generated by triggering of the geomagnetic induction module 110 embedded at the induction trigger line, the data processing terminal determines the value of the induction area identification number Yid according to the mapping relationship between the identification number of the first geomagnetic sensor 11 and the induction area identification number, queries the corresponding induction area identification number Yid in the data table T, and if the corresponding induction area identification number Yid does not exist in the data table T at this time, executes the record creating operation and creates a new data item. If the vehicle generates the vehicle entrance information from the a-side geomagnetic induction module 110, the Dir term is set to "a- > B", and if the C-side geomagnetic induction module 110 generates the vehicle entrance information, the Dir term is set to "C- > D". In the embodiment of the present invention, the guidance area identification number may be understood as a pre-compiled vehicle driving guidance area number, which is used to represent and retrieve each vehicle driving guidance area, and the specific value is a highway stake number value where the vehicle driving guidance area starts to guide the trigger line. The n-item value in the record corresponding to the induction area identification number Yid is 1, the count-item value in the record corresponding to the induction area identification number Yid is 1, the Yid-item value is the number of the highway piles where the vehicle driving induction area starts to induce the trigger line, and the start time value and the end time value are both the time values of the current timer module 319.
Step S1013: and when the trigger signal of the first geomagnetic sensor is continuously received, increasing the number of vehicles in the record corresponding to the induction area identification number.
When a vehicle continuously enters a vehicle driving induction area, the data processing terminal 3 adds 1 to the n-item value in the record corresponding to the induction area identification number Yid in the data table T and adds 1 to the count item value in the corresponding record in the data table T each time the vehicle driving information is received, the Yid item value and the Dir item value in the corresponding record in the data table T are kept unchanged, the start value in the corresponding record in the data table T is updated to the time value of the current time timer module 319, and the end value in the corresponding record in the data table T is kept unchanged.
Step S1014: and when a trigger signal of a second geomagnetic sensor is received, reducing the number of vehicles corresponding to the induction area identification number.
When the vehicle exits from the vehicle driving guidance area, the geomagnetic induction module 110 embedded at the guidance trigger line is finished to trigger generation of vehicle departure information, the vehicle departure information is transmitted to the geomagnetic sensing sending module 112 through the geomagnetic relay module 111, and is transmitted to the data processing terminal 3 through the RS485 bus, and the table T is dynamically maintained:
and (3) updating the record: the data processing terminal 3 determines the induction area identification number Yid according to the mapping relationship between the identification number of the second geomagnetic sensor 12 embedded at the induction-finished trigger line and the induction area identification number each time the vehicle driving-out information is received, the n-item value in the record corresponding to the induction area identification number Yid in the data table T is reduced by 1, the count item value, the Dir item value and the start item value in the record corresponding to the induction area identification number Yid in the data table T are kept unchanged, and the end item value in the record corresponding to the induction area identification number Yid in the data table T is updated to the time value of the current-time timer module 319.
And (4) deleting the record: when the value of n items in the record corresponding to the induction area identification number Yid in the data table T is reduced to 0, and no vehicle runs in the corresponding vehicle running induction area at this time, the data processing terminal 3 locally caches and uploads the traffic flow statistical information in the time period to the remote control center, and deletes the record from the table T after the transmission is successful.
Step S102: the method comprises the steps of obtaining environmental information of a vehicle driving induction area, wherein the environmental information at least comprises a visibility value acquired by a visibility sensor 318, a temperature and humidity value acquired by a temperature and humidity sensor 317 and a light intensity value acquired by a light sensor 316.
The data processing terminal 3 obtains an illumination intensity value of the vehicle driving induction area acquired by the illumination sensor 316, a temperature value and a humidity value of the vehicle driving induction area acquired by the temperature and humidity sensor 317, a visibility value of the vehicle driving induction area acquired by the visibility sensor 318, and the like.
Step S103: and judging whether to control the active light-emitting delineator to emit light or not according to the traffic flow data information and the environmental information.
Referring to fig. 8, which is a schematic flow chart of a method for judging light emission of an active light-emitting delineator according to an embodiment of the present invention, as shown in fig. 8, the method includes the following steps:
step S1031: and judging whether the corresponding numerical value is smaller than a corresponding preset threshold value according to the priority sequence of the visibility value, the temperature and humidity value and the illumination intensity value.
Visibility judgment priority I in the embodiment of the invention N >Judging priority I of temperature and humidity S >Priority I for judging illumination intensity G . According to the judgment priority, firstly judging whether the visibility value is lower than a preset visibility threshold value, if so, continuing to enter the subsequent step; if the result is no, then,continuously judging the temperature and humidity values, namely judging whether the temperature value and the humidity value are respectively lower than a preset temperature threshold value and a preset humidity threshold value, if so, continuously entering the subsequent steps; if not, the illumination intensity value is continuously judged, namely whether the illumination intensity value is lower than a preset illumination threshold value is judged, if yes, the subsequent steps are continuously carried out, and if not, the active light-emitting delineator 2 is judged not to be required to be controlled to emit light actively.
Step S1032: if so, when the number of vehicles in the vehicle driving induction area is greater than or equal to 1, determining that the active light-emitting delineator needs to be controlled to emit light.
After the judgment of step S1031, it is further judged whether the number of vehicles in the vehicle travel induction zone is greater than or equal to 1, that is, whether there are vehicles in the vehicle travel induction zone; and if the number of vehicles in the vehicle driving induction area is greater than or equal to 1, determining that the active light-emitting delineator 2 needs to be controlled to emit light. Preferably, if the visibility value is lower than a preset visibility threshold value, the visibility in the vehicle driving induction area is insufficient, the right active light-emitting delineator controls the yellow LED light-emitting device to flicker, and the white LED light-emitting device does not work.
Step S104: if so, sending an execution command to the luminous delineators in the multiple circulation induction intervals, wherein the execution command at least carries the induction starting delineator device identification number corresponding to each circulation induction interval; and controlling the active light-emitting outline marker in each cycle induction interval to emit light in a reverse driving direction flowing water with a fixed flashing period according to the execution command.
When it is determined in step S103 that the active light-emitting delineator 2 needs to be controlled to emit light, the data processing terminal 3 generates an execution command for starting guidance, where the execution command for starting guidance is sent in the form of a guidance execution message packet, and the guidance execution message packet is composed of four parts: the system comprises an induction area label, an induction event starting label, an induction starting outline marker device identification number and a random message label, wherein the induction area label is used for judging the position of a vehicle running induction area; the induction event starting label is used for triggering the reverse flow induction state of the active luminous delineator 2; vehicle driving induction zone drivenVehicle visual range l x Is divided into a plurality of cycle induction intervals, and the number of the active luminous delineators in each cycle induction interval is 2
Figure BDA0001202880600000131
Wherein n is x The value is rounded up. The induction starting delineator device identification number is used for designating the position of the starting induced active luminous delineator in a plurality of circulation induction intervals; the random information label is used for judging the same inducement starting event information packet, and the inducement execution information packet is transmitted to the delineator gateway node 4 from the data processing terminal 3 through the RS232 bus.
The delineator gateway node 4 distributes the inducement execution message packet generated by the data processing terminal 3 to the active luminous delineator 2 near the installation location by means of short-range wireless communication.
The active light-emitting delineator 2 distinguishes the guidance execution message packets according to the guidance area label, the guidance event start label, the guidance start delineator device identification number, and the random message label, the active light-emitting delineator 2 receives and forwards the guidance execution message packets in the vehicle driving guidance area, and for the guidance execution message packets of the same random message label, each active light-emitting delineator 2 receives and forwards only once, so that the rapid distribution of the guidance execution message packets in the vehicle driving guidance area is realized.
After the active luminous delineator 2 corresponding to the vehicle running induction area receives the induction execution message packet, the active luminous delineator 2 is matched with the retro-reflection film through the LED active luminous device, the LED active luminous device emits light automatically and conducts driving induction on running vehicles in the vehicle running induction area in a flowing water shape in a reverse direction with the vehicle running direction, a driver is prompted to generate a driving visual effect of high speed, and the driving speed is reduced actively. The method specifically comprises the following steps:
the first wireless transceiving module 214 receives the guidance execution message packet of the active lighting delineator 2, and the second data processor 212 parses the guidance execution message packet to determine the vehicle driving guidance area. After the active light-emitting delineator 2 in the corresponding vehicle driving induction area receives the induction execution message packet, the second data processor 212 controls the LED light-emitting device 213 to periodically flow water in the reverse direction;
multiple circulation induction intervals in the same vehicle driving induction area keep the same reverse water flowing period
Figure BDA0001202880600000132
Wherein l x Is the maximum driving sight distance v of the highway max Is the highest speed limit of the highway. Inquiring the self attribute Nid identification of the device by the active luminous delineator 2 in the circular induction interval, and if the inquired device Nid identification is consistent with the device identification number of the induction starting delineator, the active luminous delineator 2 begins to flicker; further, the active light-emitting delineator 2 subtracts 1 from the induction starting delineator device identifier in the induction execution message packet, and distributes the device identifier to the active light-emitting delineator 2 in the circulation induction interval; when the mark of the inducing initial delineator device is smaller than the minimum Nid mark in the corresponding cycle inducing interval, the mark of the inducing initial delineator device is set as the maximum Nid mark in the corresponding cycle inducing interval, so that the active luminous delineator 2 flickers forward flowing water in the reverse driving direction, and the flickering time of each active luminous delineator 2
Figure BDA0001202880600000133
Step S105: if not, controlling the active light-emitting delineator to be in standby.
And when the active light-emitting delineator 2 is judged not to be required to be controlled to emit light, controlling the active light-emitting delineator 2 to be in a low-power-consumption standby state.
The embodiment of the invention also shows the process of switching the active lighting delineator 2 from lighting to low power consumption standby. Specifically, when the value of n in the induction area identification number Yid corresponding record in the data table T becomes 0, the data processing terminal 3 generates an execution command for ending induction, which is transmitted in the form of an induction end message packet composed of three parts: the method comprises the steps that a guidance area label, a guidance event end label and a random message label are included, wherein the guidance area label is used for judging the position of a vehicle driving guidance area; the induction event ending label is used for ending the reverse running water induction state of the active luminous delineator 2; the random information label is used for judging an information packet of the same induction end event, and the induction end information packet is transmitted to the delineator gateway node 4 from the data processing terminal 3 through an RS232 bus;
the delineator gateway node 4 distributes an induction end message packet generated by the data processing terminal 3 to the active light-emitting delineator 2 nearby the installation position in a short-distance wireless communication mode;
the active light-emitting delineator 2 distinguishes the induction end message packets according to the induction area label, the induction event end label and the random message label, the active light-emitting delineator 2 receives and forwards the induction end message packets in the driving induction area of the vehicle, and for the induction end message packets with the same random message label, each active light-emitting delineator 2 only receives and forwards the induction end message packets once, so that the rapid distribution of the induction end message packets in the driving induction area of the vehicle is realized;
after the active light-emitting delineator 2 corresponding to the vehicle driving guidance area receives the guidance ending message packet, the LED light-emitting device 213 is turned off, the active light-emitting delineator 2 enters a low power consumption standby state, and the guidance process ends.
Referring to fig. 9, which is a schematic flow chart of another traffic guidance method for an active lighting delineator on a highway according to an embodiment of the present invention, as shown in fig. 9, on the basis of the traffic guidance method for an active lighting delineator on a highway shown in fig. 6, an embodiment of the present invention shows a process of traffic flow monitoring:
step S201: and calculating the actual distance between vehicles in the vehicle driving induction area according to the number of the vehicles in the vehicle driving induction area in the traffic flow data information and the distance between the geomagnetic sensor groups corresponding to the vehicle driving induction area.
During normal running, the number of vehicles in the vehicle running induction area is at most
Figure BDA0001202880600000141
Wherein D q For the lane length of the driving induction zone of the vehicle, l a The lowest speed limit of the expressway is v min The distance between vehicles is safe when the vehicle is running,
Figure BDA0001202880600000142
is rounding up the symbol. Triggering the data processing terminal 3 to inquire the n value when the n value in the data table T changes, detecting the current area congestion condition, if the n value is changed>cnt, the traffic jam occurs in the vehicle driving induction area, and the actual inter-vehicle distance is
Figure BDA0001202880600000143
Step S202: and when the actual distance between the two vehicles is smaller than a first critical distance, generating conventional traffic jam information.
In the embodiment of the present invention, the first critical vehicle distance may be set to any value between 51 and 100, for example, the first critical vehicle distance is set to be 70m. When the distance between vehicles is smaller than the first critical distance, the distance between vehicles in the vehicle driving induction area is smaller, at the moment, common traffic jam is generated in the vehicle driving induction area, and the data processing terminal 3 generates conventional traffic jam information.
Step S203: when the actual distance between vehicles is smaller than a second critical distance, generating emergency traffic jam information; and the second critical vehicle distance is smaller than the first critical vehicle distance.
In a specific implementation, the second critical vehicle distance may be set to 50, and the second critical vehicle distance is smaller than the first critical vehicle distance. When the following distance l s <And when the distance between the vehicles in the vehicle running guidance area is smaller than 50 hours, the vehicle running guidance area generates serious congestion or a traffic accident, and the data processing terminal generates an emergency traffic congestion message.
Step S204: and sending the conventional traffic jam information or the emergency traffic jam information to a remote control center.
The data processing terminal 3 further transmits the normal traffic congestion information generated at step S202 or the emergency traffic congestion information generated at step S203 to the remote control center. Moreover, the data processing terminal 3 may also periodically query the count value and the dir value in the data table T at intervals, and count the total number of vehicles passing through in the statistical period I in the "a- > B" driving direction and the "C- > D" driving direction, where the value of the statistical period I may be adaptively set according to the road segment situation, for example, traffic statistics may be performed every 1 hour, and the traffic statistics is uploaded to the remote control center through the wireless data transmission module, and the count value is set to 0 after the uploading is successful.
In specific implementation, since a traffic accident may occur near the start position of the vehicle driving induction area, the number of vehicles in the vehicle driving induction area is small, and in order to alarm the vehicle accident occurring near the start position of the vehicle driving induction area, the embodiment of the present invention further includes, on the basis of the method shown in fig. 9, the data processing terminal 3 querying a start time entry value and an end time entry value in the data table T in real time, and generating a traffic accident alarm information if Δ T = | end time — start time | value is greater than a given time interval threshold value. Time interval threshold may be taken D q /v min Wherein D is q For the path length of the driving induction zone of the vehicle, v min The lowest speed limit of the expressway in the vehicle driving induction area is provided. And further, sending the traffic accident alarm information to a remote control center.
In addition, in order to further improve the traffic guidance effect, the embodiment of the present invention dynamically adjusts the lighting period of the active lighting delineator 2, and specifically, adjusts the flashing period of the active lighting delineator 2 according to the conventional traffic congestion information or the emergency traffic congestion information. According to the judgment of the process, when the vehicle running induction area is relatively congested, namely corresponding to the situation of generation of conventional traffic jam information, the flickering period of the active luminous delineator 2 can be reduced, the influence of the light of the active luminous delineator 2 on the driving of a driver can be effectively prevented, and the traffic jam in front of the vehicle to be entered is reminded; when the vehicle is very congested in the driving induction area, namely, the situation corresponds to the generation of the emergency traffic jam information, the flickering cycle of the active luminous delineator 2 can be further reduced.
The following provides specific implementation processes and effect diagrams of the present invention by combining with specific simulation experiments, it should be noted that the embodiment of the present invention is only an exemplary embodiment, and in the specific implementation, a person skilled in the art may set corresponding parameters according to specific traffic guidance requirements for implementation, and the embodiment of the present invention is not described again.
The simulation experiment adopts German space navigation center to develop microscopic and continuous road traffic simulation software SUMO, the platform is developed as open source, multimode and microscopic road traffic simulation, and the platform mainly aims to provide a tool for realizing and evaluating traffic algorithms for traffic research organizations. The simulation embodiment comprises two parts of traffic flow statistics and congestion detection. In the simulation, a simulation scene is set as a bidirectional four-lane expressway, the length of the expressway is 2000m, the highest speed limit of the expressway is 120km/h, and 1 geomagnetic sensor is respectively arranged at the position of 500m point and the position of 1500m point of each lane in simulation coordinates. The parameters of the vehicle nodes in the simulation experiment are shown in table 3:
table 3:
class of parameters Set value
Type of vehicle flow type
Maximum vehicle speed 33.33m/s
Number of 300 vehicles/lane
Maximum acceleration 2m/s 2
Maximum deceleration 4.5m/s 2
Length of car body 5m
Driver reaction speed 0.5s
Simulation example:
table 4 gives the simulation record of the data structure T in the data processing terminal 3 when the simulation time has progressed to 300 s. The data processing terminal 3 periodically traverses the data structure T, the data processing terminal 3 generates congestion information and transmits the congestion information to the remote control center through the wireless transmission module, fig. 10 is a traffic flow statistics line graph provided by the embodiment of the invention, the remote control center performs statistics for 5 minutes as a period to obtain a simulated traffic flow statistics line graph, and fig. 11 is a congestion scene simulation schematic diagram provided by the embodiment of the invention.
Table 4:
Yid n count dir starttime endtime
K0+500 25 31 A->B 297 117
K1+1500 6 36 C->D 297 299
as can be seen from the description of the above embodiments, in the traffic guidance method for the active luminous delineator on the expressway provided by the embodiment of the present invention, traffic flow data information of a vehicle driving guidance area is counted, where the traffic flow data information at least includes the number of vehicles in the vehicle driving guidance area; acquiring environmental information of a vehicle driving induction area, wherein the environmental information at least comprises a visibility value acquired by a visibility sensor 318, a temperature and humidity value acquired by a temperature and humidity sensor 317 and an illumination intensity value acquired by an illumination sensor 316; judging whether to control the active light-emitting delineator 2 to emit light or not according to the traffic flow data information and the environmental information; if yes, sending an execution command to the active luminous delineators 2 in the plurality of circulation induction intervals, wherein the execution command at least carries an induction starting delineator device identification number corresponding to each circulation induction interval; controlling the luminous delineator in each circulation induction interval to emit light in a fixed flashing period against the running water in the vehicle direction according to the device identification number of the induction starting delineator; if not, the active light-emitting delineator 2 is controlled to be in standby. The LED light-emitting device 213 is added on the traditional retro-reflective contour mark and is matched with the geomagnetic sensor group 1, so that the traffic guidance time can be accurately judged, and the safety guidance and congestion detection of vehicles in areas with easy accident occurrence, severe traffic environment and the like can be realized by combining active light-emitting and passive reflection when traffic guidance is needed, and the traffic guidance effect is effectively improved; moreover, the device has the advantages of strong external interference resistance, simple equipment, low cost, accurate detection and easy system maintenance, reduces the complexity of data processing, improves the traffic detection speed, can play an auxiliary role in traffic management, and realizes the rapid acquisition and accurate monitoring of road condition information.
It is noted that, in this document, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above description is merely illustrative of particular embodiments of the invention that enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. An active luminous delineator traffic guidance method for a highway is characterized by comprising the following steps:
counting traffic flow data information of a vehicle driving induction area, wherein the traffic flow data information at least comprises the number of vehicles in the vehicle driving induction area;
initializing traffic flow data information;
determining an induction area identification number according to an identification number of a first geomagnetic sensor triggered by a vehicle;
when a trigger signal of the first geomagnetic sensor is received, increasing the number of vehicles corresponding to the induction area identification number; when a trigger signal of a second geomagnetic sensor is received, reducing the number of vehicles corresponding to the induction area identification number;
acquiring environmental information of a vehicle driving induction area, wherein the environmental information at least comprises a visibility value acquired by a visibility sensor, a temperature and humidity value acquired by a temperature and humidity sensor and an illumination intensity value acquired by an illumination sensor;
judging whether to control the active light-emitting delineator to emit light or not according to the traffic flow data information and the environmental information;
if yes, sending an execution command to the active luminous delineators in the plurality of circulation induction intervals, wherein the execution command at least carries the induction starting delineator device identification numbers corresponding to the circulation induction intervals and the reverse flowing water circulation periods in the circulation induction intervals; controlling the active light-emitting outline mark in each circulation induction interval to emit light in the reverse running direction with a reverse running water circulation period according to the execution command;
multiple circulation induction intervals in the same vehicle driving induction area keep the same reverse water flowing period
Figure FDA0003863112690000011
Wherein l x Is the maximum driving sight distance v of the highway max The highest speed limit of the highway is set; inquiring self attribute Nid identification of the active luminous delineator in the circulation induction interval, and if the inquired Nid identification of the device is consistent with the device identification number of the induction starting delineator, starting flashing the active luminous delineator; further subtracting 1 from the device identifier of the inducing initial delineator in the inducing execution message packet by the active light-emitting delineator, and distributing the device identifier of the inducing initial delineator to the active light-emitting delineator in the circulation inducing interval; when the induction start delineator apparatus identification is less than the minimum Nid identification within the corresponding loop induction intervalSetting the mark of the inducing initial delineator device as the maximum Nid mark in the corresponding circulation inducing interval so as to realize that the active luminous delineator flickers forward flowing water in the reverse driving direction, and the flicking time of each active luminous delineator 2
Figure FDA0003863112690000012
Wherein n is x Representing the number of the active luminous delineators in each cycle induction interval;
if not, controlling the active light-emitting delineator to be in standby.
2. The traffic guidance method according to claim 1, wherein determining whether to control the active lighting delineator to emit light according to the traffic flow data information and the environmental information includes:
judging whether the corresponding numerical values are smaller than corresponding preset threshold values or not according to the priority sequence of the visibility values, the temperature and humidity values and the illumination intensity values;
if so, when the number of vehicles in the vehicle driving induction area is greater than or equal to 1, determining that the active light-emitting delineator needs to be controlled to emit light.
3. The traffic inducing method of claim 1, further comprising:
calculating the actual distance between vehicles in the vehicle driving induction area according to the number of the vehicles in the vehicle driving induction area in the traffic flow data information and the distance between the geomagnetic sensor groups corresponding to the vehicle driving induction area;
when the actual distance between the two vehicles is smaller than a first critical distance, generating conventional traffic jam information;
when the actual distance between vehicles is smaller than a second critical distance, generating emergency traffic jam information; wherein the second critical vehicle distance is smaller than the first critical vehicle distance;
and sending the conventional traffic jam information or the emergency traffic jam information to a remote control center.
4. An inducing apparatus for the traffic inducing method of the active luminous delineator of the expressway as claimed in any one of claims 1 to 3, comprising a geomagnetic sensor group provided on each lane, a plurality of active luminous delineators provided on both sides of a vehicle travel inducing area, a data processing terminal, and a delineator gateway node, wherein:
the geomagnetic sensor group comprises a first geomagnetic sensor and a second geomagnetic sensor, the first geomagnetic sensor is arranged at an entrance position of the vehicle running induction area, and the second geomagnetic sensor is arranged at an exit position of the vehicle running induction area;
the data processing terminal and the delineator gateway node are both arranged in the middle section of the vehicle driving induction area; the data processing terminal is in wired communication connection with the first geomagnetic sensor and the second geomagnetic sensor in each geomagnetic sensor group; the data processing terminal is in wired communication connection with the delineator gateway node;
the active luminous delineators are in wireless communication connection with the data processing terminal through the delineator gateway nodes, and adjacent active luminous delineators are in wireless communication connection.
5. The induction device according to claim 4, wherein the first geomagnetic sensor, the active luminous delineator and the second geomagnetic sensor are arranged in sequence along a driving direction, and a first distance exists between the first geomagnetic sensor and the corresponding nearest active luminous delineator, and a first distance exists between the second geomagnetic sensor and the corresponding nearest active luminous delineator; the first distance is a distance calculated according to the driving speed, the reaction time and the resistance coefficient.
6. The induction device according to claim 4, wherein the data processing terminal comprises an illumination sensor, a temperature and humidity sensor and a visibility sensor.
7. The inducing apparatus as claimed in claim 4, wherein the wireless transmission power of the active lighting delineator is calculated according to the wireless broadcast distance of the active lighting delineator, the center frequency of the wireless radio frequency signal and the receiving sensitivity.
8. The induction device of claim 4, wherein the active illuminated delineator comprises a left active illuminated delineator device and a right active illuminated delineator device distinguished by mounting location, wherein:
the left active light-emitting delineator and the right active light-emitting delineator both comprise an LED light-emitting device and a retro-reflective film; the LED light-emitting devices are all arranged on the periphery of the retro-reflecting reflective film;
a circle of white LED light-emitting devices and a circle of yellow LED light-emitting devices which are equal in number are uniformly distributed at intervals on the periphery of the right active light-emitting outline marker, and the white LED light-emitting devices and the yellow LED light-emitting devices are respectively and independently controlled;
and a circle of yellow LED light-emitting devices are uniformly distributed on the periphery of the left active light-emitting delineator, and the number of the yellow LED light-emitting devices is equal to that of the yellow LED light-emitting devices in the right active light-emitting delineator.
9. The guidance device according to claim 4, wherein when the lane in the vehicle travel guidance area is a curved lane, the first geomagnetic sensor is provided at a position close to an outer edge of the curved lane, and the second geomagnetic sensor is provided at a position close to an inner edge of the curved lane.
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