CN106710258A - Variable speed limit control system for expressway tunnel portal - Google Patents
Variable speed limit control system for expressway tunnel portal Download PDFInfo
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- CN106710258A CN106710258A CN201710068455.0A CN201710068455A CN106710258A CN 106710258 A CN106710258 A CN 106710258A CN 201710068455 A CN201710068455 A CN 201710068455A CN 106710258 A CN106710258 A CN 106710258A
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- control system
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- 238000012545 processing Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 19
- 206010039203 Road traffic accident Diseases 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000005413 snowmelt Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H10/00—Improving gripping of ice-bound or other slippery traffic surfaces, e.g. using gritting or thawing materials ; Roadside storage of gritting or solid thawing materials; Permanently installed devices for applying gritting or thawing materials; Mobile apparatus specially adapted for treating wintry roads by applying liquid, semi-liquid or granular materials
- E01H10/005—Permanently-installed devices for applying gritting or thawing materials, e.g. for spreading grit, for spraying de-icing liquids
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H5/00—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice
- E01H5/10—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice by application of heat for melting snow or ice, whether cleared or not, combined or not with clearing or removing mud or water, e.g. burners for melting in situ, heated clearing instruments; Cleaning snow by blowing or suction only
- E01H5/108—Devices for melting snow or ice in situ and removing subsequently for the mud or melting water
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Road Signs Or Road Markings (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses the technical field of intelligent traffic, specifically a variable speed limit control system for an expressway tunnel portal. The system comprises a power device, a road deicing device, a traffic flow detection device, an information release device and a central processing unit, wherein the road deicing device is arranged at the tunnel portal, the traffic flow detection device is arranged at the downstream position of the tunnel portal, and the information release device is arranged at the upstream position of the tunnel portal. The system can real-timely monitor and timely clean ice and snow on the tunnel portal pavement, simultaneously control the speed limit value of the tunnel portable in real time in combination with the magnitude of the traffic flow, and release the tunnel portal pavement situation and the speed limit situation in advance, thereby ensuring the traffic safety at the tunnel portal.
Description
Technical field
The present invention relates to technical field of intelligent traffic, more particularly to a kind of freeway tunnel mouthful variable speed-limit control system
System.
Background technology
With the fast development of highway, the tunnel built on highway is also more and more, but the presence in tunnel
Many potential disasters are faced with, tunnel face is icy on road or accumulated snow is exactly a disaster for often resulting in traffic accident.Tunnel
Road constantly drives the flowing of air due to self structure and vehicular traffic, causes the generation of air Temperature Difference inside and outside tunnel,
Tunnel face road surface easily freezes and accumulated snow after rainfall snowfall.Particularly in the winter time, icy on road, accumulated snow can not melt in time.
Often along with the drastically change of light intensity, the sight line of human pilot needs a period of time and distance to adapt to for the gateway in tunnel
Light stronger outside dark light or tunnel in tunnel, it is impossible to ambient conditions and traffic feelings near fast reaction tunnel face
Condition, and when tunnel face road surface has icing or accumulated snow, cause vehicle brake braking distance to become big, car speed is high in addition, makes
Into brake not in time, so easily there is vehicle rear-end collision, the pernicious traffic accident such as shunt into one another.
At present, China is provided with suitable for the tunnel gateway static state speed limit under normal pavement state in tunnel face, is lacked
The weary detection to tunnel face pavement state, also lacks to tunnel face pavement state during the determination of tunnel gateway speed limit
Consideration.
Chinese Patent Application No. 201521070443.4 discloses a kind of tunnel exit pavement humidity alarming device, including wet
Degree inductor, control unit and display screen, described humidity sensor are arranged on the humidity letter of tunnel exit collection tunnel exit
Breath, described display screen is arranged in tunnel, and described control unit is by processing humidity information that humidity sensor is gathered simultaneously
The information is shown by display screen, the device is it is possible to notify that the capable humidity to the human pilot tunnel exit road surface at the tunnel
Information, ensures traffic safety at tunnel exit to a certain extent, but the device only reminds human pilot to note tunnel exit
The humidity condition on road surface, the real-time restricted speed not when pavement state is severe, support vehicles safety tunnel face.
Chinese Patent Application No. 201310611578.6 disclose a kind of prevention tunnel gateway nearby rear-end collision can
Become speed-limiting control method, the method sets Traffic flow detecting device in tunnel gateway downstream position, and upstream position sets in tunnel face
Variable information notice board is put, comprehensive various factors calculates optimal speed limit, vehicles passing in and out is reminded by variable information notice board,
The incidence of rear-end collision near tunnel gateway is significantly reduced, but the method does not account for tunnel gateway road surface
Wet and slippery degree has a great impact to vehicle safe driving, little in traffic flow if tunnel gateway is present frozen or accumulated snow
In the case of, in the speed limit for calculating in the method still there is very big risk in traveling.
The content of the invention
It is an object of the invention to overcome the above-mentioned deficiency in the presence of prior art, there is provided a kind of freeway tunnel mouthful
Variable speed-limit control system, real-time monitoring tunnel face ice and snow on road surfaces situation and can remove, in combination with the magnitude of traffic flow in time
Size real-time control tunnel face speed limit, it is ensured that the traffic safety at tunnel face.
In order to realize foregoing invention purpose, the invention provides following technical scheme：
A kind of freeway tunnel mouthful variable speed-limit control system, including supply unit, road surface deicing device, vehicle Flow Detection dress
Put, information delivery apparatus and central processing unit.The road surface deicing device is arranged on tunnel face, being capable of real-time monitoring tunnel face road
Surface state and in time pro-active intervention, will influence the factor of traffic safety to eliminate；The traffic flow detecting device is arranged on tunnel face
Downstream position, can in real time obtain traffic flow data and traffic flow modes are monitored；Described information distributing device is arranged on
The upstream position of tunnel face, being capable of real-time release road surface ahead situation and traffic conditions, real-time release speed limit, the passing car of prompting
Drive with caution.
The road surface deicing device includes telemetry unit and active deicer, the telemetry unit, active
Deicer is connected with the central processing unit.Wherein described telemetry unit includes remote sensing type road surface state sensor and distant
Gan Shi roads face temperature sensor, is capable of the situation of the ponding, accumulated snow or icing on real-time monitoring tunnel face road surface, and pavement state is believed
Breath sends to central processing unit and is analyzed judgement, controls the active deicer to influenceing traffic safety on the road surface of tunnel face
Factor intervened.
The active deicer includes pillar and the heating system on pillar, and the heating system includes air inlet
Mouth, air blower, heater, gas outlet, the gas outlet are arranged on one side of the pillar near roadside, and the air inlet is arranged on
The one side opposite with gas outlet on pillar, the air blower, heater are arranged on the hollow inside of pillar, can be processed in center
Device receive telemetry unit detect tunnel face road surface exist ponding, accumulated snow or freeze when, active heater, air blast
Machine, it is quick to produce hot blast road pavement to be heated up, ponding, accumulated snow or the quick removing that freezes is clean.
The active deicer includes pillar and the Snow Agent dispenser on pillar, the Snow Agent dispenser
Including nozzle and Snow Agent accommodating chamber, can detect that there is ice on road surface or avenging causes friction effects to be driven a vehicle in telemetry unit
When safe, control the Snow Agent dispenser to open by central processing unit, Snow Agent is sprayed by road pavement and removes road in time
, in order to avoid ice and snow thickeies causes slipperiness on roads, there is traffic accident in the ice and snow in face.
The Snow Agent is organic Snow Agent, and snow melt effect is good, not corrosion-damaged to environment.
The traffic flow detecting device is wagon detector, is used to detect that vehicle passes through and vehicle speed condition.
Described information distributing device be variable information board, can by road surface have ice, snowy, ponding, deicing complete, removed the snow
The information such as dry into, road surface to issue out, road ahead situation, traffic and real-time speed limit situation known for human pilot,
Judge in time.
The power module is device of solar generating, including solar battery group, controller for solar and battery, institute
State solar battery group connection controller for solar, controller for solar connection battery, using solar powered effective solution
Remote mountain areas highway equipment is powered the problem of difficulty.
Compared with prior art, beneficial effects of the present invention：
1st, the present invention uses telemetry unit and traffic flow detecting device real-time monitoring tunnel face pavement state information and vehicle
The vehicle flowrate situation in downstream is travelled, after these information are received, comprehensive analysis is calculated under present case central processing unit
F-Zero limits value, by pavement state information, telecommunication flow information and Maximum speed limit value in time issue in variable information board
On, know road ahead and traffic, timely regulation speed in advance so as to human pilot.
2nd, present invention employs telemetry unit, the thickness of ponding, icing, accumulated snow, Neng Gou can be accurately detected
There is the appearance that ice crystal is detected before skidding in road, and active deicer is opened in time, is not road surface accumulation occur very
Thick ice sheet, influences traffic safety；Telemetry unit is used simultaneously, is more convenient to install and is safeguarded, due to telemetry unit
Noninvasive testing technology is used, without carrying out grooving to road surface during installation, this is public for the high speed built up
Installation cost is undoubtedly greatlyd save for road, and telemetry unit will not be as the sensor of flush type is easily by passing car
Damage is rolled, extend the service life of detection means.
3rd, the present invention uses device of solar generating, for whole system is powered, is solved remotely using resource is cleaned
The road furniture in area is powered difficult problem, while powered using clean energy resource to be also beneficial to alleviate environmental pollution, energy shortage etc.
Problem.
Brief description of the drawings：
Fig. 1 is the structural representation of the preferred embodiment of the present invention 1.
Fig. 2 is the structural representation of road surface deicer in the preferred embodiment of the present invention 1.
Fig. 3 is the workflow diagram of road surface deicer in the preferred embodiment of the present invention 1.
Fig. 4 is the structural representation of road surface deicer in the preferred embodiment of the present invention 2.
Marked in figure：1- solar battery groups, 2- telemetry units, 3- air outlets, 4- pillars, 5- nozzles.
Specific embodiment
With reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
For the scope of above-mentioned theme of the invention is only limitted to following embodiment, all technologies realized based on present invention belong to this
The scope of invention.
It is that will enter be rolled away from outside tunnel in the stretch or tunnel in tunnel outside tunnel to define tunnel face upstream
Stretch.
It is the stretch having just enter into tunnel or the stretch for just having rolled away from outside tunnel to define tunnel face downstream.
Embodiment 1
As shown in Figure 1 and Figure 2, a kind of freeway tunnel mouthful variable speed-limit control system, including device of solar generating, road surface
Deicer, traffic flow detecting device, information delivery apparatus and central processing unit.
The road surface deicing device is arranged on tunnel face, and it includes telemetry unit 2 and active deicer, described distant
Sense detection means 2, active deicer are communicated to connect with the central processing unit.Wherein described telemetry unit 2 includes distant
Gan Shi roads surface state sensor and remote sensing type road face temperature sensor.Remote sensing type road surface state sensor is former using spectral measurement
Reason, can accurately measure the thickness of ponding, icing, accumulated snow, and ice crystal just can be accurately measured before ice crystal causes road to skid
Occur, it is ensured that the traffic safety of road, used in combination with remote sensing type road face temperature sensor, to causing road surface friction force to reduce
Factor judge it is more accurate.Telemetry unit 2 is capable of the situation of the ponding, accumulated snow or icing on real-time monitoring tunnel face road surface,
Pavement state information is sent to central processing unit and is analyzed judgement, control the active deicer on the road surface of tunnel face
The factor of traffic safety is influenceed to be intervened.
The active deicer include pillar 4 and the heating system on pillar 4, the heating system include into
Gas port, air blower, heater, gas outlet 3, the gas outlet 3 are arranged on one side of the pillar 4 near roadside, the air inlet
The one side opposite with gas outlet 3 is arranged on pillar, and the air blower, heater are arranged on the hollow inside of pillar 4, Neng Gou
When telemetry unit 2 detects that road surface has water, ice, the snow to cause the road surface friction force to reduce, actively removed by central processing unit control
Ice production apparatus are opened, and timely road pavement blowing hot-air is dried or deicing snow removing, ensures that road safety is passed through.
The traffic flow detecting device is arranged on the downstream position of tunnel face, the i.e. front of vehicle traveling, can examine in real time
Traffic flow conditions in front of measuring car traveling, whether the downstream that may determine that tunnel face based on the traffic flow data for detecting occurs
Congestion so that central processing unit can as early as possible find downstream congestion status and then adjust speed limit, it is ensured that vehicle is in safe distance
Interior completion braking procedure.Preferably, the traffic flow detecting device is wagon detector, is used to detect that vehicle passes through and speed feelings
Condition.
Described information distributing device is arranged on the upstream position of tunnel face, being capable of real-time release road surface ahead situation and traffic
Situation, real-time release speed limit reminds vehicular traffic to drive with caution.Preferably, described information distributing device is variable feelings
Report plate, can have the information such as ice, snowy, ponding, deicing is completed, snow removing is completed, road surface drying to issue out on road surface, for traveling
And the vehicle for coming knows road ahead situation, traffic and real-time speed limit situation, speed is controlled in advance.
Device of solar generating includes solar battery group 1, controller for solar and battery, the solar battery group
1 connection controller for solar, controller for solar connection battery.Solar battery group 1 is arranged on the top of pillar 4, described
Pillar 4 is hollow structure, and controller for solar is arranged on the hollow inside of the pillar 4, and battery may be mounted at pillar 4
Inside can also be arranged on underground.In addition, supply unit can also be consistent with the power supply mode that tunnel interior lighting device is used, can
To be directly connected to the power supply of tunnel interior lighting device, the installation cost of the system is which decreased.
Connection between central processing unit and each device can be base by wireless Zigbee network, wireless Zigbee network
It is the wireless communication technology of a kind of short distance, low-power consumption in the low-power consumption LAN protocol of IEEE802.15.4 standards.
Fig. 3 shows the workflow diagram of road surface deicer in the preferred embodiment of the present invention.
With reference to Fig. 3, the workflow of road surface deicer is as follows in the preferred embodiment of the present invention：When remote sensing type road face temperature
Sensor detect pavement temperature not higher than zero degree when, while remote sensing type road face situation sensors detect road surface and have the feelings of accumulated snow
Condition, central processing unit control starts heating system, starts air blower, heater, by the air inspiration hollow leg 4 of air inlet
Interior, heated device is heated into hot blast and is blown out by gas outlet 3, by the Snowremoval on road surface；If remote sensing type road face situation sensors
When detecting road surface and having the situation of ice, central processing unit control starts heating system, and the icing on road surface is removed；Work as remote sensing type
When road face temperature sensor detects pavement temperature higher than zero degree, while remote sensing type road face situation sensors detect road surface and have product
The situation of water, central processing unit control starts heating system, and the ponding on road surface is removed；Other situations, road surface dries can be with
Support vehicles drive safely.
Road surface deicer being capable of real-time monitoring tunnel face road surface using telemetry unit in the preferred embodiment of the present invention
Situation, can in time find the ice and snow and ponding situation on road surface, when icing, accumulated snow or ponding are just produced just can actively
Take measures, the factor that coefficient of friction influence anti-slide performance will be reduced on road surface is eliminated, and is unlikely to make ice and snow or ponding on road surface
Further aggravate to trigger traffic accident.
Refer to be published in《Highway communication science and technology》11 phases in 2010《Road surface slippery situation index is developed and its in traffic circulation pipe
Application in reason》Road surface slippery situation index is divided into 4 grades in one text, as shown in table 1：
| Road surface slippery situation index | Range of friction coefficients | Pavement skid resistance condition | Correspondence pavement behavior |
| 1 grade | F≥015 | Normally | Normal temperature, drying |
| 2 grades | 0135≤F<015 | It is slightly worse | Ponding |
| 3 grades | 012≤F<0135 | It is poor | Loose snow, mottled ice, frost |
| 4 grades | F<012 | It is very poor | Accumulated snow or ice sheet |
Table 1
As shown in Table 1, when there is certain ponding on road surface, the anti-slide performance on road surface declines, and has influence on normal vehicle operation, but right
Pavement skid resistance condition influence it is maximum belong to accumulated snow and icing, therefore, freeway tunnel mouthful once there is accumulated snow or icing,
Easily occur skidding for the vehicle run at high speed, cause traffic accident.
Refer to《Road surface slippery situation index is developed and its application in traffic operation》According to road surface slippery situation in one text
Recommendation speed limit under condition, special traffic flow.For example, the speed limit of general freeway tunnel is 80km/h, work as wagon flow
Measure during for 400pcu, recommend speed limit in below 80km/h when coefficient of friction is 015, coefficient of friction recommends speed limit when being 0135
Recommend speed limit in below 70km/h, when coefficient of friction is 012 in below 60km/h, it is identical to rub as wagon flow numerical quantity is bigger
Recommendation speed limit is less and less under wiping coefficient.Tunnel face road surface slippery situation index and ice and snow are detected in combination with telemetry unit
Situation, comprehensive consideration calculates recommendation speed limit.
In addition, the speed limits such as " 80km/h ", " 60km/h ", " 40km/h ", " 20km/h " are prestored in central processing unit, when
The signal that central processing unit is detected according to telemetry unit and wagon detector, handles it and provides speed limit, by variable
Advices plate 5 releases news such as " there are ponding, speed limit 60km/h in tunnel face ", " there is accumulated snow tunnel face, and speed limit 40km/h please drives with caution
Sail " and " road ahead is crowded, speed limit 40km/h simultaneously note maintain safe distance " etc. information warning, advance notice human pilot road ahead
Information, when surface gathered water, accumulated snow or icing removing are finished, variable information board releases news as " ponding/accumulated snow/icing is clear
Except " etc. prompting, inform that human pilot can be with safe passing.
Embodiment 1
As shown in figure 4, the present embodiment and embodiment 1 differ only in active deicer, the active deicing dress of the present embodiment
The Snow Agent dispenser including pillar 4 and on the pillar 4 is put, the Snow Agent dispenser includes nozzle 5 and snow melt
Agent accommodating chamber, the nozzle 5 is arranged on pillar 4 near the side of road, and it is hollow that the Snow Agent accommodating chamber is arranged on pillar 4
It is internal.Can be when telemetry unit detects that road surface has ice or snow to cause frictional force reduction influence traffic safety, by center
Processor controls the Snow Agent dispenser to open, and the ice and snow that Snow Agent removes road surface in time is sprayed by road pavement, in order to avoid
Ice and snow thickeies causes slipperiness on roads, traffic accident occurs.
Preferably, the Snow Agent is organic Snow Agent, and snow melt effect is good, not corrosion-damaged to environment.At present, at a high speed
Using more often chloride salt Snow Agent in highway, and this kind of Snow Agent is although cheap, but its residue road pavement
There is certain corrosiveness with automobile rubber tire.The organic Snow Agent used in the present embodiment does not corrode work to infrastructure
With, but price is higher, but the present invention is simply in the pavement usage of freeway tunnel mouthful, is not that large area is used, so
The use of organic Snow Agent will not cause burden to the maintenance cost of highway.
The present embodiment can not the ponding of road pavement be purged, road pavement antiskid performance impact is maximum as shown in Table 1
Factor is accumulated snow and icing, eliminates accumulated snow or the icing on tunnel face road surface, also can to a certain extent ensure that vehicular traffic is pacified
Full traveling, while the power consumption of the present embodiment is relatively low, it is adaptable to which some solar energy resourceses are not that very abundant tunnel face installation makes
With.
Claims (9)
1. a kind of freeway tunnel mouthful variable speed-limit control system, including supply unit, road surface deicing device, vehicle Flow Detection
Device, information delivery apparatus and central processing unit, the road surface deicing device are arranged on tunnel face, the traffic flow detecting device
The downstream position of tunnel face is arranged on, described information distributing device is arranged on the upstream position of tunnel face.
2. freeway tunnel according to claim 1 mouthful variable speed-limit control system, it is characterised in that remove on the road surface
Ice production apparatus include telemetry unit and active deicer, the telemetry unit, active deicer and the center
Processor is connected.
3. freeway tunnel according to claim 2 mouthful variable speed-limit control system, it is characterised in that the remote sensing inspection
Surveying device includes remote sensing type road surface state sensor and remote sensing type road face temperature sensor.
4. freeway tunnel according to claim 2 mouthful variable speed-limit control system, it is characterised in that the active is removed
Ice production apparatus include pillar and the heating system on pillar, the heating system include air inlet, air blower, heater,
Gas outlet, the gas outlet is arranged on one side of the pillar near roadside, and the air inlet is arranged on pillar and gas outlet phase
Anti- one side, the air blower, heater are arranged on the hollow inside of pillar.
5. freeway tunnel according to claim 2 mouthful variable speed-limit control system, it is characterised in that the active is removed
Ice production apparatus include pillar and the Snow Agent dispenser on pillar, and the Snow Agent dispenser includes that nozzle and Snow Agent are held
Receive chamber.
6. freeway tunnel according to claim 5 mouthful variable speed-limit control system, it is characterised in that the Snow Agent
It is organic Snow Agent.
7. freeway tunnel according to claim 1 mouthful variable speed-limit control system, it is characterised in that the vehicle flowrate
Detection means is wagon detector.
8. freeway tunnel according to claim 1 mouthful variable speed-limit control system, it is characterised in that described information is sent out
Arrange and be set to variable information board.
9. freeway tunnel according to claim 1 mouthful variable speed-limit control system, it is characterised in that the power supply mould
Block is device of solar generating, including solar battery group, controller for solar and battery, the solar battery group connection
Controller for solar, controller for solar connection battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710068455.0A CN106710258A (en) | 2017-02-08 | 2017-02-08 | Variable speed limit control system for expressway tunnel portal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710068455.0A CN106710258A (en) | 2017-02-08 | 2017-02-08 | Variable speed limit control system for expressway tunnel portal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106710258A true CN106710258A (en) | 2017-05-24 |
Family
ID=58910375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710068455.0A Withdrawn CN106710258A (en) | 2017-02-08 | 2017-02-08 | Variable speed limit control system for expressway tunnel portal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106710258A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808534A (en) * | 2017-11-24 | 2018-03-16 | 北京百纳友为科技有限公司 | A kind of tunnel safety protector and system |
| CN109389830A (en) * | 2018-11-21 | 2019-02-26 | 合肥林夏智能科技有限公司 | A kind of intelligent transportation speed limiting device suitable for urban road |
| CN110766948A (en) * | 2019-11-06 | 2020-02-07 | 星云互联(湖南)科技有限公司 | Road speed-changing and speed-limiting guiding method, device, system and storage medium |
| CN113338185A (en) * | 2019-08-27 | 2021-09-03 | 山东交通学院 | Deceleration strip and snow removing method using deceleration strip to remove snow |
| CN113846595A (en) * | 2021-09-15 | 2021-12-28 | 北京工业大学 | Condensate water and snow removing system for tunnel portal |
| CN113958364A (en) * | 2021-09-27 | 2022-01-21 | 中铁二十二局集团有限公司 | Tunnel disaster early warning method |
-
2017
- 2017-02-08 CN CN201710068455.0A patent/CN106710258A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808534A (en) * | 2017-11-24 | 2018-03-16 | 北京百纳友为科技有限公司 | A kind of tunnel safety protector and system |
| CN109389830A (en) * | 2018-11-21 | 2019-02-26 | 合肥林夏智能科技有限公司 | A kind of intelligent transportation speed limiting device suitable for urban road |
| CN113338185A (en) * | 2019-08-27 | 2021-09-03 | 山东交通学院 | Deceleration strip and snow removing method using deceleration strip to remove snow |
| CN113338185B (en) * | 2019-08-27 | 2022-04-01 | 山东交通学院 | Deceleration strip and snow removing method using deceleration strip to remove snow |
| CN110766948A (en) * | 2019-11-06 | 2020-02-07 | 星云互联(湖南)科技有限公司 | Road speed-changing and speed-limiting guiding method, device, system and storage medium |
| CN113846595A (en) * | 2021-09-15 | 2021-12-28 | 北京工业大学 | Condensate water and snow removing system for tunnel portal |
| CN113846595B (en) * | 2021-09-15 | 2024-05-28 | 北京工业大学 | Condensate water removing and snow removing system for tunnel portal |
| CN113958364A (en) * | 2021-09-27 | 2022-01-21 | 中铁二十二局集团有限公司 | Tunnel disaster early warning method |
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Application publication date: 20170524 |
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| WW01 | Invention patent application withdrawn after publication |