CN108510753A - A kind of computational methods of bend descending section single-point overspeed snapping system position - Google Patents
A kind of computational methods of bend descending section single-point overspeed snapping system position Download PDFInfo
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- CN108510753A CN108510753A CN201810426322.0A CN201810426322A CN108510753A CN 108510753 A CN108510753 A CN 108510753A CN 201810426322 A CN201810426322 A CN 201810426322A CN 108510753 A CN108510753 A CN 108510753A
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- bend descending
- bend
- section
- descending section
- speed
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- 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
- G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
- G08G1/0175—Detecting movement of traffic to be counted or controlled identifying vehicles by photographing vehicles, e.g. when violating traffic rules
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- General Physics & Mathematics (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
Abstract
The invention discloses a kind of computational methods of bend descending section single-point overspeed snapping system position.The present invention obtains the 85%th speed of bend descending section starting point according to historical statistical data；85%th speed of bend descending section starting point is compared to obtain the target velocity in bend descending section with the maximum operational speed in bend descending section；The position of bend descending section single-point overspeed snapping system setting is calculated according to the target velocity in bend descending section.Compared with prior art, the present invention is conducive to the effect that single-point overspeed snapping system more preferably plays anti-hypervelocity, drop knocks into the back, ensures safety, to improve traffic safety.
Description
Technical field
The invention belongs to single-point overspeed snapping system installation position field more particularly to a kind of bend descending section single-point are super
The computational methods of fast capturing system position.
Background technology
Drive over the speed limit is one of an important factor for causing rear-end collision.Reduce car speed deviation and standard by speed limit
Difference improves the stability of traffic flow, can reduce rear-end collision to a certain extent, reduces rear-end collision intensity.Currently,
Common speed limit measure mainly has speed(-)limit sign, longitudinal deceleration graticule, oscillation crosswise speed reduction marking and overspeed snapping etc..Overspeed snapping
System slows down mandatory strong, and for its installation position, existing specification regulation is multiple and survey should be arranged in Dangerous Area in traffic accident
Fast evidence taking equipment, but do not elaborate for specific installation position, and the randomness of its installation position also results in safe effect
It is not fully up to expectations.
Invention content
In order to solve problems in the prior art, the present invention proposes a kind of bend descending section single-point overspeed snapping system position
The computational methods set.
The technical scheme is that a kind of computational methods of bend descending section single-point overspeed snapping system position, special
Sign is, includes the following steps：
Step 1：The 85%th speed of bend descending section starting point is obtained according to historical statistical data；
Step 2：By the maximum operational speed in the 85%th speed of bend descending section starting point and bend descending section into
Row relatively obtains the target velocity in bend descending section；
Step 3：The single-point overspeed snapping system setting of bend descending section is calculated according to the target velocity in bend descending section
Position.
Preferably, historical statistical data described in step 1 is speed of the vehicle by bend descending section starting point：
Wherein,For jth vehicle speed,Middle car speed is less than or equal toThe quantity of vehicle be M, M/N ≈ 85%,It is for the 85%th speed of bend descending section starting point：
Preferably, the target velocity in the section of bend descending described in step 2 is：
vs=min { v85,vmax}
Wherein, v85For the 85%th speed of the section of bend descending described in step 1 starting point, vmaxFor bend descending section
Maximum operational speed, value range is：
Wherein, R be bend descending section circular curve radius, m,For cornering ratio, ihFor minimum superelevation；
Preferably, the position of the section of bend descending described in step 3 single-point overspeed snapping system setting is apart from step 1
Described in bend descending section starting point distance：
Wherein, v0For driver find overspeed snapping system when car speed, vsFor the target velocity in bend descending section, g
For acceleration of gravity, f is moist bituminous paving friction coefficient,For moist bituminous paving attachment coefficient, i is mean inclination, δ1For
The influence coefficient of wheel of vehicle inertia force, δ2For the influence coefficient of engine flywheel inertia force, ω is the transmission ratio of power train, a
For vehicle braking deceleration, C is upwind coefficient, and ρ is atmospheric density, and A is front face area, and m is vehicle mass, t1When to perceive
Between, t2To judge decision-making time, t3For the reaction time, l is distance of visual cognition.
Compared with prior art, present invention determine that bend descending section single-point overspeed snapping system installation position, is conducive to
The effect that single-point overspeed snapping system more preferably plays anti-hypervelocity, drop knocks into the back, ensures safety, to improve traffic safety.
Description of the drawings
Fig. 1：The flow chart of the present invention；
Fig. 2：Section vehicle behavior characteristic plane schematic diagram is arranged in the single-point overspeed snapping system of the present invention；
Fig. 3：Section vehicle behavior feature schematic longitudinal section is arranged in the single-point overspeed snapping system of the present invention.
Specific implementation mode
Understand for the ease of those of ordinary skill in the art and implement the present invention, with reference to the accompanying drawings and embodiments to this hair
It is bright to be described in further detail, it should be understood that implementation example described herein is merely to illustrate and explain the present invention, not
For limiting the present invention.
Step 1：The 85%th speed of bend descending section starting point is obtained according to historical statistical data；
Historical statistical data described in step 1 is speed of the vehicle by bend descending section starting point：
Wherein,For jth vehicle speed,Middle car speed is less than or equal toThe quantity of vehicle be M, M/N ≈ 85%,It is for the 85%th speed of bend descending section starting point：
Step 2：By the maximum operational speed in the 85%th speed of bend descending section starting point and bend descending section into
Row relatively obtains the target velocity in bend descending section；
The target velocity in the section of bend descending described in step 2 is：
vs=min { v85,vmax}
Wherein, v85For the 85%th speed of the section of bend descending described in step 1 starting point, vmaxFor bend descending section
Maximum operational speed, value range is：
Wherein, R be bend descending section circular curve radius, m,For cornering ratio, ihFor minimum superelevation；
Step 3：The single-point overspeed snapping system setting of bend descending section is calculated according to the target velocity in bend descending section
Position.
The position of the section of bend descending described in step 3 single-point overspeed snapping system setting is apart from curved described in step 1
The distance of road descending section starting point：
Wherein, v0For driver find overspeed snapping system when car speed, vsFor the target velocity in bend descending section, g
=9.8m/s2For acceleration of gravity, f=0.01 is moist bituminous paving friction coefficient,Adhere to for moist bituminous paving and is
Number, i=0.02 is mean inclination, δ1=0.03 is the influence coefficient of wheel of vehicle inertia force, δ2=0.05 is used for engine flywheel
Property power influence coefficient, ω=3 be power train transmission ratio, a=1m/s2For vehicle braking deceleration, C=0.32 is to be windward
Number, ρ=1.2258N*s2/m4For atmospheric density, A=1.4m2For front face area, m=1800kg is vehicle mass, t1=0.4s
To perceive time, t2=2s is to judge decision-making time, t3=1.5s is the reaction time, and l=65m is distance of visual cognition.
It should be understood that the above-mentioned description for preferred embodiment is more detailed, can not therefore be considered to this
The limitation of invention patent protection range, those skilled in the art under the inspiration of the present invention, are not departing from power of the present invention
Profit requires under protected ambit, can also make replacement or deformation, each fall within protection scope of the present invention, this hair
It is bright range is claimed to be determined by the appended claims.
Claims (4)
1. a kind of computational methods of bend descending section single-point overspeed snapping system position, which is characterized in that include the following steps：
Step 1：The 85%th speed of bend descending section starting point is obtained according to historical statistical data；
Step 2：85%th speed of bend descending section starting point and the maximum operational speed in bend descending section are compared
Relatively obtain the target velocity in bend descending section；
Step 3：The position of bend descending section single-point overspeed snapping system setting is calculated according to the target velocity in bend descending section
It sets.
2. the computational methods of bend descending according to claim 1 section single-point overspeed snapping system position, feature exist
In：Historical statistical data described in step 1 is speed of the vehicle by bend descending section starting point：
Wherein,For jth vehicle speed,Middle car speed is less than or equal toThe quantity of vehicle be M, M/N ≈ 85%,It is for the 85%th speed of bend descending section starting point：
3. the computational methods of bend descending according to claim 1 section single-point overspeed snapping system position, feature exist
In：The target velocity in the section of bend descending described in step 2 is：
vs=min { v85,vmax}
Wherein, v85For the 85%th speed of the section of bend descending described in step 1 starting point, vmaxMost for bend descending section
The big speed of service, value range are：
Wherein, R be bend descending section circular curve radius, m,For cornering ratio, ihFor minimum superelevation.
4. the computational methods of bend descending according to claim 1 section single-point overspeed snapping system position, feature exist
In：The position of the section of bend descending described in step 3 single-point overspeed snapping system setting is apart from bend descending described in step 1
The distance of section starting point：
Wherein, v0For driver find overspeed snapping system when car speed, vsFor the target velocity in bend descending section, g attaches most importance to
Power acceleration, f are moist bituminous paving friction coefficient,For moist bituminous paving attachment coefficient, i is mean inclination, δ1For vehicle
The influence coefficient of wheel inertia power, δ2For the influence coefficient of engine flywheel inertia force, ω is the transmission ratio of power train, and a is vehicle
Braking deceleration, C is upwind coefficient, and ρ is atmospheric density, and A is front face area, and m is vehicle mass, t1To perceive time, t2For
Judge decision-making time, t3For the reaction time, l is distance of visual cognition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810426322.0A CN108510753A (en) | 2018-05-07 | 2018-05-07 | A kind of computational methods of bend descending section single-point overspeed snapping system position |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810426322.0A CN108510753A (en) | 2018-05-07 | 2018-05-07 | A kind of computational methods of bend descending section single-point overspeed snapping system position |
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| CN108510753A true CN108510753A (en) | 2018-09-07 |
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| CN201810426322.0A Pending CN108510753A (en) | 2018-05-07 | 2018-05-07 | A kind of computational methods of bend descending section single-point overspeed snapping system position |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200955130Y (en) * | 2006-09-06 | 2007-10-03 | 交通部公路科学研究所 | Magnetic road mark |
| JP2008202968A (en) * | 2007-02-16 | 2008-09-04 | Denso Corp | Vehicle navigation device |
| CN102787568A (en) * | 2012-05-18 | 2012-11-21 | 武汉理工大学 | Method for setting double-row road surface speed control edge lines for controlling vehicle speed |
| US20160012266A1 (en) * | 2012-02-24 | 2016-01-14 | Ryan Smith | System and Method for Transmitting Information Between Multiple Objects Moving at High Rates of Speed |
| CN106373400A (en) * | 2016-11-28 | 2017-02-01 | 东南大学 | Method for continuously arranging vehicle type-divided speed limitation boards on accident-prone sections of mountain highway |
-
2018
- 2018-05-07 CN CN201810426322.0A patent/CN108510753A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200955130Y (en) * | 2006-09-06 | 2007-10-03 | 交通部公路科学研究所 | Magnetic road mark |
| JP2008202968A (en) * | 2007-02-16 | 2008-09-04 | Denso Corp | Vehicle navigation device |
| US20160012266A1 (en) * | 2012-02-24 | 2016-01-14 | Ryan Smith | System and Method for Transmitting Information Between Multiple Objects Moving at High Rates of Speed |
| CN102787568A (en) * | 2012-05-18 | 2012-11-21 | 武汉理工大学 | Method for setting double-row road surface speed control edge lines for controlling vehicle speed |
| CN106373400A (en) * | 2016-11-28 | 2017-02-01 | 东南大学 | Method for continuously arranging vehicle type-divided speed limitation boards on accident-prone sections of mountain highway |
Non-Patent Citations (2)
| Title |
|---|
| 梁营力: "高速公路长大下坡路段安全设施研究", <中国优秀硕士学位论文全文数据库工程科技II辑> * |
| 龙先军等: "公路限速标志设置的位置研究", 《西部交通科技》 * |
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Application publication date: 20180907 |
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