CN107146432A - A kind of expressway fog zone variable speed-limit device and method - Google Patents
A kind of expressway fog zone variable speed-limit device and method Download PDFInfo
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Abstract
The invention discloses a kind of expressway fog zone variable speed-limit method, including step：S1, according to visibility difference whole fog-zone section is divided into the different partition monitor section of continuous, multiple visibility, i.e. visibility section；The meteorological data in S2, in real time collection fog-zone section, using short time window as the data update cycle, described meteorological data includes：The rainfall in whole fog-zone section, the visibility of each visibility section in fog-zone section；S3, the average according to the meteorological data, with reference to road alignment geometric parameter, calculate the safe token state of each visibility section, including rain water depth on road surface and coefficient of road adhesion；S4, based on safe token state, resolve traffic safety speed limit and simultaneously issue.The invention also discloses a kind of expressway fog zone variable speed-limit device.The present invention has real-time high, and practical value is high, and strong adaptability can preferably ensure the advantage of traffic safety of the driver under the mist environment of low visibility.
Description
Technical field
The present invention relates to expressway traffic safety field, and in particular to a kind of expressway fog zone variable speed-limit device and
Method.
Background technology
Fog-zone is one of common bad terrible weather environment of highway.In natural dense fog or rainy weather condition
Under, fog-zone section reduces the visibility of road environment there may be dense fog.Simultaneously as highway along ground
The difference of shape landforms and weather condition, the visibility level of fog-zone different sections of highway is also different.In the visibility bar of varying level
Under part, the visual range of driver is different and then also different to the selection of speed.Frequently conversion speed will reduce the fortune of vehicle
, there are the bad steering behaviors such as run-off-road, anxious acceleration or anxious deceleration, influences traffic safety in row stability.
At present, in the traffic safety control measures of expressway fog zone, being to use variable speed-limit advices plate to driving mostly
Member's issue prompt message, points out driver's slow down, is not quantified clearly, rare to carry out clearly Control for Speed Limitation
's.And those existing fog-zone traffic safety Control for Speed Limitation schemes are mostly monitored and decision-making for whole fog-zone section
, speed-limiting proposal will not change in longer certain period of time (such as 1h, 3h or 6h).Under such a speed limit mode, mist
The meteorological data information updating in area is slow, and poor in timeliness not in time, is likely to result in formulated speed-limiting proposal unsuitable present situation
Driving demand.So this patent proposes a kind of for the meteorological number such as visibility and rainfall of expressway fog zone different sections of highway
According to real-time monitoring and the variable speed-limit device and method formulate and announced of speed-limiting proposal in short-term, this method combine visibility,
Rainfall and road alignment data, using short time window as the data acquisition and processing (DAP) cycle, formulate matched speed limit in time
Scheme, and being issued, quickly, better adapts to the change of weather condition and road running environment, improves highway mist
The travel safety in area section.
The content of the invention
In order to overcome the shortcoming and deficiency that prior art is present, the present invention provides a kind of expressway fog zone variable speed-limit dress
Put and method.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of expressway fog zone variable speed-limit method, it is adaptable to the fog-zone of highway, especially mountainous area highway
Section, comprises the following steps：
S1, terrain altitude, jungle distribution situation along the section of fog-zone are investigated, with reference to the formation basic theory of dense fog and right
Whole fog-zone section, is divided into continuously by the Historical Monitoring data of fog-zone section visibility distribution situation according to visibility difference
, the partition monitor section that multiple visibility are different, i.e. visibility section；
The meteorological data in S2, in real time collection fog-zone section, using short time window as the data update cycle, described meteorological data
Including：The rainfall in whole fog-zone section, the visibility of each visibility section in fog-zone section；
S3, the average according to the meteorological data, with reference to road alignment geometric parameter, calculate the peace of each visibility section
Full token state, described safe token state includes：Rain water depth on road surface and coefficient of road adhesion；
S4, based on safe token state, resolve traffic safety speed limit, formulate safety speed-limit scheme and simultaneously issue.
Further, in step S1, it is described whole fog-zone section is divided into according to visibility difference it is continuous, multiple
The step of visibility different partition monitor section be with visibility≤50m, 50~100m, 100~200m, 200~500m,
Five levels of more than 500m are that standard is divided to fog-zone section, and whole fog-zone section is divided into continuous multiple visibility
Different partition monitor sections.
Further, in step S2, the short time window is 5 minutes, 10 minutes or 15 minutes.
Further, it is described according to meteorological data average in step S3, with reference to road alignment geometric parameter, Mei Geneng
The step of safe token state of degree of opinion section, specifically includes：According to the difference of the road alignment gradient, each visibility subregion is supervised
The road alignment controlled in section carries out secondary segmenting, obtains the linear of multiple continuous, different gradients in each visibility section
Away minor segment, then calculate rain water depth on road surface and coefficient of road adhesion in each linear away minor segment, and by the meter of each linear away minor segment
Calculate coefficient of road adhesion and《Highway in China design standard》The attachment coefficient of the wet road surface of middle suggestion is compared, and chooses it most
The small coefficient of road adhesion value being worth as the visibility section.
Further, it is described based on safe token state in step S4, traffic safety speed limit is resolved, and formulate safety
The step of speed-limiting proposal, specifically includes：According to safe token state, with reference to visibility and safe distance between vehicles computation model, each energy is obtained
The safety speed-limit value in degree of opinion section section, and Speed Limitation on Freeway management rule is combined, formulate the safety limit of each visibility section
Fast scheme.
Further, the average of described meteorological data includes rainfall average, when described rainfall average is current
Between in window the rainfall in whole fog-zone section arithmetic mean of instantaneous value, unit is mm/min.
Further, the average of described meteorological data includes visibility average, when described visibility average is current
Between in window the visibility of each visibility section arithmetic mean of instantaneous value, unit is m.
The device of expressway fog zone variable speed-limit method as mentioned is realized, including in each visibility section
The visibility monitoring modular of portion position, control module and rainfall monitoring mould in the system of whole fog-zone midblock position
Block, installed in each visibility section starting point information issuing module, described visibility monitoring modular includes visibility
Detector, the first transmitting antenna, described visibility detector are used to gather seeing for the current time visibility section in real time
Degrees of data；The visibility data that the first described transmitting antenna in real time collects visibility detector are transferred in system and controlled
Module；Described rainfall monitoring module includes laser rainfall detection device and transmission cable, and described laser rainfall detection device is used
In collection rainfall product data in real time, described transmission cable is used to the rainfall product data that laser rainfall detection device is gathered being transferred to
Control module in module, described system is controlled in system includes the first reception antenna, cabinet, the second transmitting antenna, described cabinet
Onboard data processing unit；The visibility that the first described reception antenna real-time reception is sent from each visibility monitoring modular
Data, and it is transferred to cabinet；The second described transmitting antenna is the speed-limiting proposal of each visibility section after cabinet is handled
It is sent to each information issuing module.
Further, described information issuing module includes LED variable informations advices plate and the second reception antenna, described
LED variable informations advices plate is used for the speed-limiting proposal for showing the visibility partition monitor section in real time；Second reception antenna
The speed-limiting proposal of module is controlled in system for receiving, and is transferred to LED variable information advices plates.
Further, described laser rainfall detection device handles single using RS485 or RS232 interface modes and chassis data
Member connection, all transmitting antennas and reception antenna use wireless communication connection.
Beneficial effects of the present invention：
(1) present invention is the laser rainfall detection device and visibility detector, variable information information used using device
The equipment and technologies such as plate are ripe, and application cost is relatively low；Therefore, the present invention has the advantages that construction cost is relatively low, easy to implement；
(2) present invention is specific to the meteorological data progress of the away minor segment of the different visibility in expressway fog zone section
The apparatus and method for detecting, calculating in real time and issue, emphasis solves driver under different visibility environments, because the change of sighting distance
Change, blindly carries out speed selection, and then causes roadability to decline, and the shadows such as anxious acceleration, anxious deceleration or run-off-road occurs
This problem of the bad steering behavior of sound traffic safety, gives the clear and definite safe speed recommended value of driver, reduction is driven in real time
The person of sailing to drive a vehicle speed selection blindness, alleviate driver because mist environment low visibility cause anxiety, fear and not
The sense of security, improves the travel safety of driver, especially new hand driver.
(3) present invention is ageing strong using controlling cycle of the short time window as system, can be timely responded in the short time
The change of weather condition, improves travel safety；
(4) present invention is calculated in real time by rainfall data, the visibility data gathered in real time, and with reference to road geometric parameter
The situation of change of road running environment, is reacted in the determination of Control for Speed Limitation scheme, for environment by coefficient of road adhesion in real time
Change adaptability it is stronger；
(5) implementation of the invention carries out safety speed-limit management for the fog-zone section of highway, with specific landform (sea
Pull out), road environment (jungle etc.), road geometric parameter (gradient, length of grade) combine, specific aim, can preferably adapt at a high speed
The actual conditions of highway, security is higher；
(6) present invention is ageing good, practical, it is easy to promotion and application.
Brief description of the drawings
Fig. 1 is the expressway fog zone variable speed-limit schematic device of the embodiment of the present invention.
Fig. 2 is the execution flow chart of the expressway fog zone variable speed-limit device of the embodiment of the present invention.
Fig. 3 is the expressway fog zone variable speed-limit method and step and schematic flow sheet of the embodiment of the present invention.
Fig. 4 is that the visibility partition monitor section partition of the expressway fog zone variable speed-limit method of the embodiment of the present invention shows
It is intended to.
Fig. 5 is that the linear away minor segment of the expressway fog zone variable speed-limit method of the embodiment of the present invention divides schematic diagram.
Fig. 6 is the automobile brake of the safety speed-limit model construction based on driver safety stopping sight distance of the embodiment of the present invention
Process deceleration-time chart.
Fig. 7 is the following state of the safety speed-limit model construction based on driver safety stopping sight distance of the embodiment of the present invention
Lower vehicle braking procedure schematic diagram.
In figure：1- laser rainfall detection devices；2- cabinets；3- transmission cables；The reception antennas of 4- first；5- second launches day
Line；6- visibility detectors；The transmitting antennas of 7- first；8-LED variable information advices plates；The reception antennas of 9- second.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment
As shown in Figures 1 and 2, examined including laser rainfall a kind of expressway fog zone variable speed-limit device, present apparatus part
The rainfall monitoring modular that device 1 and transmission cable 3 are constituted is surveyed, what cabinet 2, the first reception antenna 4 and the second transmitting antenna 5 were constituted
Module is controlled in system, the device of the above-mentioned two module is arranged on the trackside lamppost of whole fog-zone midblock position, institute
State the onboard data processing unit of cabinet 2；Also include the visibility monitoring mould that the transmitting antenna 7 of visibility detector 6 and first is constituted
Block, described visibility monitoring modular is arranged on the lamppost of each visibility section medium position；Also include LED variable information feelings
The information issuing module for reporting the reception antenna 9 of plate 8 and second to constitute, described information issuing module is arranged on each visibility section
On the trackside LED post of starting point, the speed-limiting proposal for showing the visibility partition monitor section in real time, described second receives
Antenna 9 is used to receive the speed-limiting proposal that module is controlled in system, and is transferred to LED variable informations advices plate 8；The laser rain
The detection of amount detector 1 obtains rainfall product data, and visibility detector 6 detects the visibility data for obtaining each control zone, built-in
Data processing unit is calculated in real time using rainfall product data, visibility data, monitoring section geometry linear data and speed limit math model
The safety speed-limit value of each visibility section.
The laser rainfall detection device 1 is entered using RS485 or RS232 interface modes with the onboard data processing unit of cabinet 2
By transmitting and reception between row data transfer, cabinet 2 and visibility detector 6, cabinet 2 and LED changeability informations plate 8
Antenna is communicated using wireless technology.
As shown in figure 3, a kind of expressway fog zone variable speed-limit method realized by said apparatus, comprises the following steps：
Can see obtained by S1, the along the line height above sea level according to fog-zone section, jungle distribution situation and historical data statistical analysis
Distribution situation is spent, is specially：With "≤50m, 50~100m, 100~200m, 200~500m, more than 500m " five visibility etc.
Expressway fog zone section is divided into different partition monitor section (the visibility area of multiple continuous, visibility by level standard
Section), section k (k=1~n, n are total for the visibility section in whole fog-zone section) is recorded as respectively, as shown in figure 4, this implementation
Whole fog-zone section is divided into 7 visibility sections, i.e. section 1~7 by example；
Further according to the difference of the gradient, secondary segmenting is carried out to each visibility section, being recorded as j, (j=1~m, m are energy
Degree of opinion section k divides obtained linear away minor segment sum according to different gradient), as shown in figure 5, the present embodiment is by visibility section
K is divided into 3 linear away minor segments, i.e. away minor segment 1~3.
S2, detected by visibility and laser rainfall detection device gathers the meteorological data in fog-zone section in real time, with the short time
Window is the data update cycle, asks for the average of each meteorological data, described meteorological data includes the visibility of each visibility section
With the rainfall in whole fog-zone section, the short time window is 5 minutes, 10 minutes or 15 minutes.
In present embodiment, described rainfall average (rainfall intensity) is whole fog-zone section in window cycle short time
Rainfall arithmetic mean of instantaneous value, be specially：
Y=Y/T
In formula：Y --- the rainfall intensity in the cycle, mm/min；Y --- the rainfall in the cycle, mm；T --- week
The length of phase, min.
In present embodiment, described visibility average is the calculation of the visibility of visibility section in window cycle short time
Art average value,
R=60Tf
In formula：R --- the visibility data sample total amount in the cycle, it is individual；The sampling frequency of f --- visibility detector
Rate, Hz；VSIk--- the visibility average of k-th of visibility section, m in the cycle；E --- compiled for visibility data sample
Number；vsike--- e-th of visibility data samples values of k-th of visibility section, m in the cycle.
S3, according to meteorological data average, calculate in each section time window cycle, the peace in each visibility partition monitor section
Full token state (using truck as standard), the safe token state includes rain water depth on road surface, coefficient of road adhesion；
In present embodiment, described rain water depth on road surface is based on the rainfall intensity in window cycle short time, each line
Length of grade, the gradient and the pavement structural depth of shape away minor segment are tried to achieve, and are specially：
Dkj=0.1258 × Lkj 0.6715×Y0.7786×Ikj -0.3147×tdkj 0.7261
In formula：Dkj--- the rain water depth on road surface of j-th of linear away minor segment of kth visibility section, mm, Dkj≥0；
Lkj--- the length of grade of j-th of linear away minor segment of kth visibility section, m；Ik--- j-th of kth visibility section is linear small
The section head fall (%) of section, disregards symbol；Y --- the rainfall intensity in the cycle, mm/min；tdk--- kth can be shown in
Spend the pavement structural depth of j-th of linear away minor segment of section, mm；
In present embodiment, described coefficient of road adhesion is based on rain water depth on road surface and monitoring section raw security limit
Fast value is asked for, then with being compared in highway in China design standard on the coefficient of road adhesion recommended value on wet road surface, and
Choose its minimum value to try to achieve, be specially：
In formula：--- the coefficient of road adhesion of j-th of linear away minor segment of kth visibility section is (using truck as mark
It is accurate)；V0kj--- the original speed limit of j-th of linear away minor segment of kth visibility section；For the meter of k-th of visibility section
Calculate attachment coefficient；--- the coefficient of road adhesion recommended value on the wet road surface in highway in China design standard.
S4, based on safe token state, resolve traffic safety speed limit, and formulate safety speed-limit scheme, characterized according to safety
Amount, obtains the safety speed-limit value based on driver safety stopping sight distance of each visibility section.
As shown in Figure 6, Figure 7, in present embodiment, the speed limit math model based on driver safety stopping sight distance is：
VSIk≥hAbundant k
In formula：hAbundant k--- visibility section k safe driving spacing (m)；lCar--- Vehicle length (m), in view of vehicle
Disunity, so using poor situation (truck), generally taking 12m~15m；l1+lCar--- the braking distance (m) of front truck,
Consider worst situation, i.e. l1=0；l2--- rear car is in reaction time tReactionInterior operating range (m)；l2--- rear car is in reaction
Time tReactionInterior operating range (m)；l3--- the braking distance (m) of rear car；lPeace--- minimum safe spacing (m), generally take 1
~2m；Vvsik--- the safety speed-limit value under current visibility environments of the visibility section, km/h；tReaction--- driver
In the reaction time, typically take 2.5s；--- the coefficient of road adhesion of kth visibility section；ik--- in visibility section, meter
The head fall value (%) of the corresponding linear away minor segment of coefficient of road adhesion minimum value is calculated, is gone up a slope as just, descending is negative；g——
Acceleration of gravity, 9.8m/s2。
In present embodiment, choose and be less than speed limit Vvsik, and it is used as visibility section k for 5 numerical value of integral multiple
Final safety speed-limit value Vk：
According to final safety speed-limit value VkWith Speed Limitation on Freeway management control regulation, formulate in window cycle short time
The speed-limiting proposal of each visibility partition monitor section, i.e. new departure.And contrasted with upper cycle speed-limiting proposal, if both phases
It is same then do not replace, it is directly entered the data processing link in next cycle；Replaced if both differ, pass through the wireless of cabinet
New departure is transmitted to the reception antenna of information issuing module by transmitting antenna, and enters the data processing link in next cycle.
Second reception antenna 9 of information issuing module is received after speed-limiting proposal, is transferred to LED variable information advices plates
New departure is shown issue by 8, LED variable information advices plates 8.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by the embodiment of the invention
Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (10)
1. a kind of expressway fog zone variable speed-limit method, it is characterised in that public suitable for highway, especially highways in mountain areas
The fog-zone section on road, comprises the following steps：
S1, terrain altitude, jungle distribution situation along the section of fog-zone are investigated, with reference to the formation basic theory of dense fog and to fog-zone
Whole fog-zone section, is divided into continuous, many by the Historical Monitoring data of section visibility distribution situation according to visibility difference
The different partition monitor section of individual visibility, i.e. visibility section；
The meteorological data in S2, in real time collection fog-zone section, using short time window as the data update cycle, described meteorological data bag
Include：The rainfall in whole fog-zone section, the visibility of each visibility section in fog-zone section；
S3, the average according to the meteorological data, with reference to road alignment geometric parameter, calculate the security table of each visibility section
The amount of levying, described safe token state includes：Rain water depth on road surface and coefficient of road adhesion；
S4, based on safe token state, resolve traffic safety speed limit, formulate safety speed-limit scheme and simultaneously issue.
2. a kind of expressway fog zone variable speed-limit method according to claim 1, it is characterised in that in step S1, institute
That states is divided into whole fog-zone section according to visibility difference the step of the different partition monitor section of continuous, multiple visibility
Suddenly it is that, with visibility≤50m, 50 ~ 100m, 100 ~ 200m, five levels of 200 ~ 500m, more than 500m are standard to fog-zone section
Divided, whole fog-zone section is divided into the different partition monitor section of continuous multiple visibility.
3. a kind of expressway fog zone variable speed-limit method according to claim 1, it is characterised in that in step S2, institute
Short time window is stated for 5 minutes, 10 minutes or 15 minutes.
4. a kind of expressway fog zone variable speed-limit method according to claim 1, it is characterised in that in step S3, institute
State according to meteorological data average, have with reference to road alignment geometric parameter, the step of the safe token state of each visibility section
Body includes：According to the difference of the road alignment gradient, secondary point is carried out to the road alignment in each visibility partition monitor section
Section, obtains multiple continuous, linear away minor segments of different gradient in each visibility section, then calculate in each linear away minor segment
Rain water depth on road surface and coefficient of road adhesion, and by the calculating coefficient of road adhesion of each linear away minor segment and《Highway in China is designed
Standard》The attachment coefficient of the wet road surface of middle suggestion is compared, and the road surface for choosing its minimum value as the visibility section is attached
Coefficient value.
5. a kind of expressway fog zone variable speed-limit method according to claim 1, it is characterised in that in step S4, institute
State based on safe token state, the step of resolving traffic safety speed limit, and formulate safety speed-limit scheme specifically includes：According to peace
Full token state, with reference to visibility and safe distance between vehicles computation model, obtains the safety speed-limit value in each visibility section section, and tie
Speed Limitation on Freeway management rule is closed, the safety speed-limit scheme of each visibility section is formulated.
6. a kind of expressway fog zone variable speed-limit method according to claim 1, it is characterised in that described meteorological number
According to average include rainfall average, described rainfall average is the calculation of the rainfall in whole fog-zone section in current time window
Art average value, unit is mm/min.
7. a kind of expressway fog zone variable speed-limit method according to claim 1, it is characterised in that described meteorological number
According to average include visibility average, described visibility average is the calculation of the visibility of each visibility section in current time window
Art average value, unit is m.
8. realize the device of the expressway fog zone variable speed-limit method any one of claim 1-7, it is characterised in that
Including the visibility monitoring modular installed in each visibility section medium position, installed in whole fog-zone midblock position
Controlled in system module and rainfall monitoring module, installed in each visibility section starting point information issuing module, it is described
Visibility monitoring modular include visibility detector, the first transmitting antenna, described visibility detector is used to gather in real time
The visibility data of the current time visibility section；The first described transmitting antenna in real time collects visibility detector
Visibility data be transferred in system and control module；Described rainfall monitoring module includes laser rainfall detection device and transmission electricity
Cable, described laser rainfall detection device is used to gather rainfall product data in real time, and described transmission cable is used to examine laser rainfall
The rainfall product data of survey device collection, which is transferred in system, controls module, and module is controlled in described system includes the first reception antenna, machine
Case, the second transmitting antenna, described cabinet onboard data processing unit；The first described reception antenna real-time reception comes from each energy
The visibility data that degree of opinion monitoring modular is sent, and it is transferred to cabinet；The second described transmitting antenna is that cabinet is handled into it
The speed-limiting proposal of each visibility section afterwards is sent to each information issuing module.
9. device according to claim 8, it is characterised in that：Described information issuing module includes LED variable information feelings
Plate and the second reception antenna are reported, described LED variable informations advices plate is used to show the visibility partition monitor section in real time
Speed-limiting proposal；Second reception antenna is used to receive the speed-limiting proposal that module is controlled in system, and is transferred to the variable letters of LED
Cease advices plate.
10. device according to claim 8, it is characterised in that：Described laser rainfall detection device using RS485 or
RS232 interface modes are connected with chassis data processing unit, and all transmitting antennas and reception antenna are connected using radio communication
Connect.
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| CN109389845A (en) * | 2017-08-02 | 2019-02-26 | 南京洛普股份有限公司 | A kind of multifactor integration high speed highway dynamic vehicle speed managing and control system |
| CN109624987A (en) * | 2019-01-30 | 2019-04-16 | 长安大学 | A kind of longitudinal direction of car driving safety spacing calculation method under road surface slippery situation state |
| CN110503824A (en) * | 2019-07-31 | 2019-11-26 | 贵州省交通规划勘察设计研究院股份有限公司 | A kind of traffic safety auxiliary driving method and system |
| CN110533915A (en) * | 2019-09-23 | 2019-12-03 | 浙江科技学院 | A kind of Intellectualized monitoring method preventing turnpike driving congestion and system |
| CN110567472A (en) * | 2019-08-16 | 2019-12-13 | 武汉东湖大数据交易中心股份有限公司 | Vehicle-mounted meteorological data management method and device, terminal equipment and storage medium |
| CN113077646A (en) * | 2021-03-22 | 2021-07-06 | 北京工业大学 | Bridge operation safety multi-level differentiation prevention and control method |
| CN114360270A (en) * | 2021-07-26 | 2022-04-15 | 云南省交通规划设计研究院有限公司 | Method and system for studying and judging maximum allowable speed of highway under adverse weather influence |
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