CN110060490A - A kind of crossing safety auxiliary system and its control method based on line holographic projections - Google Patents
A kind of crossing safety auxiliary system and its control method based on line holographic projections Download PDFInfo
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- CN110060490A CN110060490A CN201910276776.9A CN201910276776A CN110060490A CN 110060490 A CN110060490 A CN 110060490A CN 201910276776 A CN201910276776 A CN 201910276776A CN 110060490 A CN110060490 A CN 110060490A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
- E01F9/576—Traffic lines
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- G—PHYSICS
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- G08G1/00—Traffic control systems for road vehicles
- G08G1/005—Traffic control systems for road vehicles including pedestrian guidance indicator
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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
- G08G1/095—Traffic lights
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- G09F19/12—Advertising or display means not otherwise provided for using special optical effects
- G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds
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Abstract
The invention discloses a kind of crossing safety auxiliary system and its control method based on line holographic projections.This method comprises: judging using sound wave measuring principle the vehicle area that whether faces a difficult selection, and line holographic projections principle is combined to carry out speed guidance and warning to vehicle；The traffic lights of the ground lamp group being laid in below the graticule of pavement and control walk are consistent, and control the green light flashing of ground lamp group before the green light of traffic lights terminates；The traffic lights of the auxiliary lamp group mated formation on the left side channelizing line in every lane and control walk are consistent, and the green light of control auxiliary lamp group flashes before the green light of traffic lights terminates.Exploitativeness of the present invention is strong, is reduced intersection delay, makes one the effect of the effective synthetic operation of bus or train route, for that will enter the vehicle of dilemma zone, gives reasonable speed guidance, driver is helped to avoid the region that faces a difficult selection by the variation of control speed.
Description
Technical field
The present invention relates to traffic safety technology fields, and it is auxiliary to more particularly relate to a kind of crossing safety based on line holographic projections
Auxiliary system and its control method.
Background technique
Traffic safety problem is the major motor vehicle problem that whole world various countries all suffer from.Urban Road Traffic Accidents are mainly in
Intersection, intersection are " the multiple sources " of road passage capability in road network " bottleneck " and traffic accident, and the presence in the area that faces a difficult choice is
The one of the major reasons of accident occur for intersection.Awkward area refers to during amber light, and vehicle can neither be by stop line, cannot again
The region safely stopped in stop line.When vehicle, which enters, faces a difficult choice area, no matter what driver, which makees, is chosen, and is all necessarily occurred anxious
It brakes or makes a dash across the red light phenomenon, be easy to cause traffic accident.
In the intersection of night lights condition difference, it is unfavorable for automobile driver observation road walk situation, causes
The security risk of pedestrian's street crossing is larger；And haze weather increases in recent years, the visibility of the traffic lights seriously affected, drives
Member has little time to react, and is easy to cause traffic accident, is unfavorable for transportation system safety and effectively runs.Levels of Social Economic Development day
Benefit improves, and corresponding technology is constantly mature, and the form and functional localization of Intersections should have a new development, makes it
It is more careful, more humanized, the operation of more efficient commander and the stream that relieves traffic congestion.Area's problem currently, intersection is faced a difficult choice
Research be confined to based on advanced mobile unit more, in a kind of conceptual phase to theorize, exploitativeness is poor.
Summary of the invention
The embodiment of the present invention provides a kind of crossing safety auxiliary system and its control method based on line holographic projections, to
Solve the problems, such as above-mentioned background technique.
The embodiment of the present invention provides a kind of crossing safety auxiliary system based on line holographic projections, comprising: area's early warning of facing a difficult choice
Module, the pavement module for introducing light element and signal lamp assist in identifying module；
Awkward area's warning module, for being judged using sound wave measuring principle the vehicle area that whether faces a difficult selection,
And line holographic projections principle is combined to carry out speed guidance and warning to vehicle；
The pavement module for introducing light element, ground lamp group and control for that will be laid in below the graticule of pavement
The traffic lights of walk processed are consistent, and the green light sudden strain of a muscle of ground lamp group is controlled before the green light of traffic lights terminates
It is bright；
The signal lamp assists in identifying module, the auxiliary lamp group for that will mat formation on the left side channelizing line in every lane with
The traffic lights of control walk are consistent, and control assists the green light of lamp group before the green light of traffic lights terminates
Flashing.
Further, the awkward area be vehicle can neither safety be parked in stop line before, and cannot be before amber light terminates
The region of safety intersection.
Further, described that the vehicle area that whether faces a difficult selection is judged using sound wave measuring principle, and combine holographic
Projection theory carries out speed guidance and warning to vehicle；It specifically includes:
Using the forward speed v of the sound wave velocity measuring technique acquisition target vehicle and its distance L apart from parking money；
Data processing system with the control system of the traffic lights of control walk by being connected to obtain in real time
Green light remaining time TgWith yellow time Ty；
The acceleration a of suitable intersection width R and vehicle is set according to the different situations of each intersection；
It calculates target vehicle and passable distance S is travelled with present speed within green light remaining timeIt is green, minimum safe parking
Distance SStop, in yellow time can by distance SIt is yellow, distance S at the end of green light apart from stop lineIt is surplus, calculation expression is such as
Under:
SIt is green=Tg×v
SIt is surplus=L-SIt is green
SIt is yellow=Ty×v
In formula: t is the reaction time of driver；A is the deceleration of vehicle；If SIt is green> L, then target vehicle can be in green light knot
Stop line is crossed before beam；If SIt is green< L, then target vehicle cannot cross stop line before green light terminates；
At the end of green light, target vehicle other than minimum safe stopping distance, then can safety parking, do not need to project
Warning, meets condition are as follows:
SIt is surplus>SStop
If being unsatisfactory for above-mentioned condition, whether intersection can be sailed out of with the advance of former speed before amber light terminates according to vehicle
Mouthful, judge whether target vehicle has the tendency that the region that faces a difficult selection；Work as SIt is yellow>SIt is surplusWhen+R+l, target vehicle can terminate it in amber light
Preceding safety intersection provides the prompt for keeping former speed traveling；Work as SIt is yellow<SIt is surplusWhen+R+l, target vehicle has fallen into sunken
Enter the trend of dilemma zone；
The distance of vehicle distances stop line is L when due to acquisition speed, is avoided that and faces a difficult selection if taking speed change measure
Region needs to judge current speed and maximum limitation speed vlimRelationship:
If v >=vlim, project ramp to stop mark；
If v < vlim, then the distance S that yellow time can pass through when vehicle is advanced with intersection maximum limitation speed is calculatedAdd, meter
It calculates as follows:
Work as SAdd>SIt is surplusWhen+R+l, illustrates that driver accelerates to advance at this time and be avoided that, into dilemma zone, projection accelerates to pass through mark
Otherwise will reminds driver's pre-decelerating, avoids driving into minimum safe stopping distance.
Further, the projection, specifically includes:
When target vehicle needs to project, angle a when starting projection is calculated1, in order to avoid driver is interfered in projection, throw
The shadow time takes 2 seconds, and projection pattern is located at vehicle front L1Place calculates as follows:
L1=2 × v
Original state is reset to after projection immediately, is prepared as next target vehicle projection.
The embodiment of the present invention provides a kind of control method of crossing safety auxiliary system based on line holographic projections, comprising:
The vehicle area that whether faces a difficult selection is judged using sound wave measuring principle, and combines line holographic projections principle to vehicle
Carry out speed guidance and warning；
The traffic lights of the ground lamp group being laid in below the graticule of pavement and control walk are consistent, and
The green light flashing of ground lamp group is controlled before the green light of traffic lights terminates；
The traffic lights of mat formation the auxiliary lamp group on the left side channelizing line in every lane and control walk are protected
It holds unanimously, and the green light of control auxiliary lamp group flashes before the green light of traffic lights terminates.
Further, described that the vehicle area that whether faces a difficult selection is judged using sound wave measuring principle, and combine holographic
Projection theory carries out speed guidance and warning to vehicle；It specifically includes:
Using the forward speed v of the sound wave velocity measuring technique acquisition target vehicle and its distance L apart from parking money；
Data processing system with the control system of the traffic lights of control walk by being connected to obtain in real time
Green light remaining time TgWith yellow time Ty；
The acceleration a of suitable intersection width R and vehicle is set according to the different situations of each intersection；
It calculates target vehicle and passable distance S is travelled with present speed within green light remaining timeIt is green, minimum safe parking
Distance SStop, in yellow time can by distance SIt is yellow, distance S at the end of green light apart from stop lineIt is surplus, calculation expression is such as
Under:
SIt is green=Tg×v
SIt is surplus=L-SIt is green
SIt is yellow=Ty×v
In formula: t is the reaction time of driver；A is the deceleration of vehicle；If SIt is green> L, then target vehicle can be in green light knot
Stop line is crossed before beam；If SIt is green< L, then target vehicle cannot cross stop line before green light terminates；
At the end of green light, target vehicle other than minimum safe stopping distance, then can safety parking, do not need to project
Warning, meets condition are as follows:
SIt is surplus>SStop
If being unsatisfactory for above-mentioned condition, whether intersection can be sailed out of with the advance of former speed before amber light terminates according to vehicle
Mouthful, judge whether target vehicle has the tendency that the region that faces a difficult selection；Work as SIt is yellow>SIt is surplusWhen+R+l, target vehicle can terminate it in amber light
Preceding safety intersection provides the prompt for keeping former speed traveling；Work as SIt is yellow<SIt is surplusWhen+R+l, target vehicle has fallen into sunken
Enter the trend of dilemma zone；
The distance of vehicle distances stop line is L when due to acquisition speed, is avoided that and faces a difficult selection if taking speed change measure
Region needs to judge current speed and maximum limitation speed vlimRelationship:
If v >=vlim, project ramp to stop mark；
If v < vlim, then the distance S that yellow time can pass through when vehicle is advanced with intersection maximum limitation speed is calculatedAdd, meter
It calculates as follows:
Work as SAdd>SIt is surplusWhen+R+l, illustrates that driver accelerates to advance at this time and be avoided that, into dilemma zone, projection accelerates to pass through mark
Otherwise will reminds driver's pre-decelerating, avoids driving into minimum safe stopping distance.
Further, the projection, specifically includes:
When target vehicle needs to project, angle a when starting projection is calculated1, in order to avoid driver is interfered in projection, throw
The shadow time takes 2 seconds, and projection pattern is located at vehicle front L1Place calculates as follows:
L1=2 × v
Original state is reset to after projection immediately, is prepared as next target vehicle projection.
The embodiment of the present invention provides a kind of crossing safety auxiliary system and its control method based on line holographic projections, and existing
There is technology to compare, its advantages are as follows:
With the development and mature, intelligent, humanity transport theory popularization of relevant art, the present invention is by forward position physics
Technology line holographic projections, sound wave test the speed, modernize the information processing technology etc. to be combined with traffic control, proposes the crossing safety
Auxiliary system, the system are mainly used for solving pedestrian's street crossing, intersection awkward area, traffic lights visibility under inclement weather conditions
Problem.It is auxiliary safely to propose a kind of novel intelligent crossover mouth for application i.e. the present invention is based on completely new physical technique in intersection
Auxiliary system, the system assist in identifying list by data acquisition unit, data processing unit, line holographic projections output unit, trackside green light
Member, five subsystem compositions such as pavement intelligent recognition unit, provides the side of complete set for the intelligent processing of intersection
Case.Intelligent crossover port system exploitativeness of the invention is strong, is reduced intersection delay, makes one the work of the effective synthetic operation of bus or train route
With giving reasonable speed guidance, driver helped to pass through the change of control speed for the vehicle of dilemma zone will be entered
Change, avoids the region that faces a difficult selection.
Detailed description of the invention
Fig. 1 is a kind of crossing safety auxiliary system principle signal based on line holographic projections provided in an embodiment of the present invention
Figure；
Fig. 2 is awkward area's schematic diagram provided in an embodiment of the present invention；
Fig. 3 is the awkward each parameter schematic diagram in area provided in an embodiment of the present invention；
Fig. 4 is awkward area's workflow schematic diagram provided in an embodiment of the present invention；
Fig. 5 is awkward area's projection angle schematic diagram provided in an embodiment of the present invention；
Fig. 6 is that crossing lamp group provided in an embodiment of the present invention is integrally mated formation schematic diagram；
Fig. 7 is that lamp group provided in an embodiment of the present invention lays partial schematic diagram；
Fig. 8 is that signal lamp provided in an embodiment of the present invention assists lamp group schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1~8, the embodiment of the present invention provides a kind of crossing safety auxiliary system based on line holographic projections, this is
System includes: awkward area's warning module based on line holographic projections technology, introduces the pavement module of light element, and signal lamp auxiliary is known
Other module；Three modules complement each other again independently of each other, collectively form crossing safety auxiliary system.
(1) awkward area's warning module
The speed and location information that target vehicle is measured by sound wave velocity measuring technique, pass information to data processing system
System.Judge whether the vehicle has the tendency that the region that faces a difficult selection by calculating, and how to avoid the region that faces a difficult selection.By complete
Breath shadow casting technique is projected out corresponding mark, reminds which kind of measure driver should take.It is avoided by using line holographic projections technology
Mobile unit is used, universality is had more.
Dilemma zone refer to vehicle can neither safety be parked in stop line before, and cannot before amber light terminates safety
Intersection.Vehicle in the region D1 can not safety rest in stop line before, the vehicle in the region D2 can not be in Huang
Lamp is driven out to intersection before terminating, then what the vehicle positioned at the region D1 and D2 area coincidence part can neither be safe rests in parking
Before line, and intersection cannot be sailed out of before amber light terminates, then the region is known as the area that faces a difficult choice, as shown in Figure 1.
With the forward speed v of sound wave velocity measuring technique acquisition target vehicle and its distance L data processing apart from parking money
System passes through the available real-time green light remaining time T that is connected with signal lamp control systemgWith yellow time Ty.According to every
The acceleration a of suitable intersection width R and vehicle is arranged in the different situations of a intersection.By above-mentioned basic data, substitute into
In the calculation procedure write.It calculates target vehicle and passable distance S is travelled with present speed within green light remaining timeIt is green, most
Small safe stopping distance SStop, in yellow time can by distance SIt is yellow, distance S at the end of green light apart from stop lineIt is surplus, calculate
It is as follows:
SIt is green=Tg×v
SIt is surplus=L-SIt is green
SIt is yellow=Ty×v
In formula: t is the reaction time of driver, and a is the deceleration of vehicle.If SIt is green> L, then target vehicle can be in green light
Stop line is crossed before end；If SIt is green< L, then target vehicle cannot cross stop line before green light terminates, into sentencing in next step
It is disconnected.At the end of green light, target vehicle other than minimum safe stopping distance, then can safety parking, do not need projection police
Show.Meet the condition of the situation are as follows:
SIt is surplus>SStop
If condition is not satisfied, whether intersection can should be sailed out of before amber light terminates with the advance of original degree of hastening according to vehicle
Mouthful, judge whether target vehicle has the tendency that the region that faces a difficult selection.
Work as SIt is yellow>SIt is surplusWhen+R+l, target vehicle can before amber light terminates safety intersection, at this time should to drive
Member one keeps the prompt of former speed traveling, avoids driver from taking within safe stopping distance and brings to a halt, both guarantees safety,
Reduce the delay of intersection again.
Work as SIt is yellow<SIt is surplusWhen+R+l, target vehicle, which has been fallen into, has the tendency that the region that faces a difficult selection.
The distance of vehicle distances stop line is L when due to acquisition speed, may avoid falling into if taking speed change measure
Dilemma zone.Need to judge the relationship of current speed and maximum speed limit:
If v >=vlim, project ramp to stop mark；
If v < vlim, then yellow time passable distance S when vehicle is advanced with intersection maximum limitation speed is calculatedAdd, meter
It calculates as follows:
Work as SAdd>SIt is surplusWhen+R+l, dilemma zone can be avoided enter by illustrating that driver accelerates to advance at this time, and projection accelerates to pass through
Mark.Otherwise driver's pre-decelerating is reminded, avoids driving into minimum safe stopping distance, braking distance deficiency is caused to cross parking
Line.
Present invention combination line holographic projections technology, reasonably warns the vehicle that will enter dilemma zone or speed lures
It leads, avoids enter into dilemma zone, improve traffic efficiency.It will will reach intersection but be unsatisfactory for minimum safe stopping distance
Vehicle is divided into three classes:
1, with present speed can not safe stopping in stop line, but with the speed advance can lead to safely before amber light terminates
Intersection is crossed, keeps speed to advance by projection prompt at this time.
2, with present speed can not safe stopping in stop line money, but by appropriateness accelerate can before amber light terminates safety
By intersection, accelerate to advance by projection prompt at this time.
3, with present speed can not safe stopping in stop line, by appropriateness accelerate still cannot before amber light terminates safety
By intersection, it is prepared to stop at this time by projection prompt Reduced Speed Now.
When target vehicle needs to project, angle a when starting projection is calculated1In order to avoid driver is interfered in projection, throw
The shadow time takes 2 seconds.Projection pattern is located at vehicle front L1Place.It can calculate:
L1=2 × v
Original state is reset to after projection immediately, next target vehicle projection is prepared as, repeats the above process.
(2) the pavement module of light element is introduced
Inspiration by ground light in park introduces light element in cross-road passages for pedestrians, lays below graticule corresponding
Ground lamp group.Main function is that driver can be made to pay attention to front street pedestrian at night, reduces accident, night street crossing row
Safety is guaranteed by people.The flashing of ground green light, reminds pedestrians crossing time to close to an end, and walking speed is accelerated in induction, reaches
Intersection is emptied as early as possible, improves the purpose of traffic efficiency.
Corresponding ground light is laid below the graticule of pavement.Main function is to pay attention to people from front row in night prompting driver
Lateral road keeps night street pedestrian safer.The effect of next is to remind pedestrian when closing to an end the street crossing time, is accelerated
Walking speed empties intersection as early as possible, improves traffic efficiency.
It is consistent in the ground lamp group that pavement is laid and the traffic lights of control walk, will be tied in green light
Become green light flashing when beam, pedestrian's green time is reminded to close to an end.
(3) signal lamp assists in identifying module
When the module is mainly used for that sighting distance is bad or signal lamp is obstructed, the channelizing line in every lane is with horizontal with above-mentioned people's row
The identical lamp group in road is mated formation.Light color is consistent with front green light, will be changed when end by being always on display in green light
For flashing, to remind rear driver's front signal situation of change, corresponding preparation is made as early as possible.
The left side channelizing line in every lane is mated formation with lamp group identical with above-mentioned crossing, is located at graticule.
Light color is consistent with front signal light, will become flashing from being always on display when end in green light, to remind rear to drive
Green light closes to an end in front of the person of sailing.This device solves the problems, such as signal lamp visibility when sighting distance is bad, sees driver in advance
To front signal, corresponding preparation is made as early as possible.
Based on the same inventive concept, the embodiment of the invention provides a kind of, and the crossing safety based on line holographic projections assists system
The control method of system, comprising:
The vehicle area that whether faces a difficult selection is judged using sound wave measuring principle, and combines line holographic projections principle to vehicle
Carry out speed guidance and warning；
The traffic lights of the ground lamp group being laid in below the graticule of pavement and control walk are consistent, and
The green light flashing of ground lamp group is controlled before the green light of traffic lights terminates；
The traffic lights of mat formation the auxiliary lamp group on the left side channelizing line in every lane and control walk are protected
It holds unanimously, and the green light of control auxiliary lamp group flashes before the green light of traffic lights terminates.
Further, described that the vehicle area that whether faces a difficult selection is judged using sound wave measuring principle, and combine holographic
Projection theory carries out speed guidance and warning to vehicle；It specifically includes:
Using the forward speed v of the sound wave velocity measuring technique acquisition target vehicle and its distance L apart from parking money；
Data processing system with the control system of the traffic lights of control walk by being connected to obtain in real time
Green light remaining time TgWith yellow time Ty；
The acceleration a of suitable intersection width R and vehicle is set according to the different situations of each intersection；
It calculates target vehicle and passable distance S is travelled with present speed within green light remaining timeIt is green, minimum safe parking
Distance SStop, in yellow time can by distance SIt is yellow, distance S at the end of green light apart from stop lineIt is surplus, calculation expression is such as
Under:
SIt is green=Tg×v
SIt is surplus=L-SIt is green
SIt is yellow=Ty×v
In formula: t is the reaction time of driver；A is the deceleration of vehicle；If SIt is green> L, then target vehicle can be in green light knot
Stop line is crossed before beam；If SIt is green< L, then target vehicle cannot cross stop line before green light terminates；
At the end of green light, target vehicle other than minimum safe stopping distance, then can safety parking, do not need to project
Warning, meets condition are as follows:
SIt is surplus>SStop
If being unsatisfactory for above-mentioned condition, whether intersection can be sailed out of with the advance of former speed before amber light terminates according to vehicle
Mouthful, judge whether target vehicle has the tendency that the region that faces a difficult selection；Work as SIt is yellow>SIt is surplusWhen+R+l, target vehicle can terminate it in amber light
Preceding safety intersection provides the prompt for keeping former speed traveling；Work as SIt is yellow<SIt is surplusWhen+R+l, target vehicle has fallen into sunken
Enter the trend of dilemma zone；
The distance of vehicle distances stop line is L when due to acquisition speed, is avoided that and faces a difficult selection if taking speed change measure
Region needs to judge current speed and maximum limitation speed vlimRelationship:
If v >=vlim, project ramp to stop mark；
If v < vlim, then the distance S that yellow time can pass through when vehicle is advanced with intersection maximum limitation speed is calculatedAdd, meter
It calculates as follows:
Work as SAdd>SIt is surplusWhen+R+l, illustrates that driver accelerates to advance at this time and be avoided that, into dilemma zone, projection accelerates to pass through mark
Otherwise will reminds driver's pre-decelerating, avoids driving into minimum safe stopping distance.
Further, the projection, specifically includes:
When target vehicle needs to project, angle a when starting projection is calculated1, in order to avoid driver is interfered in projection, throw
The shadow time takes 2 seconds, and projection pattern is located at vehicle front L1Place calculates as follows:
L1=2 × v
Original state is reset to after projection immediately, is prepared as next target vehicle projection.
In conclusion correlative study domestic at present, only accomplish that warning vehicle will face a difficult selection area, there is no to having
Face a difficult selection the guidance of area's vehicle.Present invention adds guide elements, there is following innovative point:
1. combining the research about intelligent crossover mouth both at home and abroad, the application based on completely new physical technique in intersection is proposed
A kind of novel intelligent crossover mouth safety assisting system, the system is by data acquisition unit, data processing unit, line holographic projections
Output unit, trackside green light assist in identifying unit, and five subsystem compositions such as pavement intelligent recognition unit, are the intelligence of intersection
Energyization processing provides the scheme of complete set.
2. intersection is faced a difficult choice, the research of area's problem is confined to based on advanced mobile unit more, in it is a kind of theorize grind
Study carefully the stage, it is more difficult to promote.Crossing system exploitativeness of the present invention is strong, is reduced intersection delay, makes one bus or train route and effectively cooperates with
The effect of operation.
3. giving reasonable speed guidance for the vehicle that will enter dilemma zone, driver being helped to pass through control speed
The variation of degree, avoids the region that faces a difficult selection.
In conjunction with the status of research and China actual cities Transportation Development both at home and abroad for intelligent crossover mouth, innovation
The intelligent crossover mouth safety assisting system for proposing complete set of property, research of the system in other scholars to awkward area's problem
On the basis of, go deep into once again it is perfect, it is innovative by frontier physics technology be applied to face a difficult choice area's problem processing on, combined data
Processing system judges the vehicle area that whether faces a difficult selection, while cooperating holographic three-dimensional projection signs, guides to vehicle
And warning, in conjunction with completely new signal lamp auxiliary system, for the guiding in real time that provides of green light phase, intelligent pedestrian's street crossing system is row
The safe passing and raising night pavement visuality of people provides feasible scheme.Match whole system combination status intersection
Intersection delay can greatly be reduced by setting, and reduce traffic accident, improve pedestrian's street crossing safety.Due to owning for the system
Equipment is laid in intersection, avoids the use of vehicle-mounted and other forms smart machines, substantially increases the general of the system
Adaptive and exploitativeness.Meanwhile along with universal universal of the continuous development of line holographic projections technology and projection device, also for
The systematic difference brings very big feasibility space.
Disclosed above is only several specific embodiments of the invention, and those skilled in the art can carry out the present invention
Various modification and variations without departing from the spirit and scope of the present invention, if these modifications and changes of the present invention belongs to the present invention
Within the scope of claim and its equivalent technologies, then the present invention is also intended to include these modifications and variations.
Claims (7)
1. a kind of crossing safety auxiliary system based on line holographic projections characterized by comprising area's warning module of facing a difficult choice draws
The pavement module and signal lamp for entering light element assist in identifying module；
Awkward area's warning module for being judged using sound wave measuring principle the vehicle area that whether faces a difficult selection, and is tied
It closes line holographic projections principle and speed guidance and warning is carried out to vehicle；
The pavement module for introducing light element, ground lamp group and control for that will be laid in below the graticule of pavement are gone
The current traffic lights of people are consistent, and the green light flashing of ground lamp group is controlled before the green light of traffic lights terminates；
The signal lamp assists in identifying module, the auxiliary lamp group for that will mat formation on the left side channelizing line in every lane and control
The traffic lights of walk are consistent, and the green light of control auxiliary lamp group dodges before the green light of traffic lights terminates
It is bright.
2. the crossing safety auxiliary system based on line holographic projections as described in claim 1, which is characterized in that the awkward area
For vehicle can neither safety be parked in stop line before, and cannot before amber light terminates safety intersection region.
3. the crossing safety auxiliary system based on line holographic projections as described in claim 1, which is characterized in that described to use sound
Wave measuring principle judges the vehicle area that whether faces a difficult selection, and combine line holographic projections principle to vehicle carry out speed guidance and
Warning；It specifically includes:
Using the forward speed v of the sound wave velocity measuring technique acquisition target vehicle and its distance L apart from parking money；
Data processing system with the control system of the traffic lights of control walk by being connected to obtain real-time green light
Remaining time TgWith yellow time Ty；
The acceleration a of suitable intersection width R and vehicle is set according to the different situations of each intersection；
It calculates target vehicle and passable distance S is travelled with present speed within green light remaining timeIt is green, minimum safe stopping distance
SStop, in yellow time can by distance SIt is yellow, distance S at the end of green light apart from stop lineIt is surplus, calculation expression is as follows:
SIt is green=Tg×v
SIt is surplus=L-SIt is green
SIt is yellow=Ty×v
In formula: t is the reaction time of driver；A is the deceleration of vehicle；If SIt is green> L, then target vehicle can be before green light terminates
Cross stop line；If SIt is green< L, then target vehicle cannot cross stop line before green light terminates；
At the end of green light, target vehicle other than minimum safe stopping distance, then can safety parking, do not need projection police
Show, meet condition are as follows:
SIt is surplus>SStop
If being unsatisfactory for above-mentioned condition, whether intersection can be sailed out of with the advance of former speed before amber light terminates according to vehicle, sentenced
Whether disconnected target vehicle has the tendency that the region that faces a difficult selection；Work as SIt is yellow>SIt is surplusWhen+R+l, target vehicle can be safe before amber light terminates
By intersection, the prompt for keeping former speed traveling is provided；Work as SIt is yellow<SIt is surplusWhen+R+l, target vehicle, which has been fallen into, to face a difficult selection
The trend in region；
The distance of vehicle distances stop line is L when due to acquisition speed, is avoided that the region that faces a difficult selection if taking speed change measure,
Need to judge current speed and maximum limitation speed vlimRelationship:
If v >=vlim, project ramp to stop mark；
If v < vlim, then the distance S that yellow time can pass through when vehicle is advanced with intersection maximum limitation speed is calculatedAdd, calculate such as
Under:
Work as SAdd>SIt is surplusWhen+R+l, illustrates that driver accelerates to advance at this time and is avoided that, into dilemma zone, projection accelerates through mark,
Otherwise driver's pre-decelerating is reminded, avoids driving into minimum safe stopping distance.
4. the crossing safety auxiliary system based on line holographic projections as claimed in claim 3, which is characterized in that the projection,
It specifically includes:
When target vehicle needs to project, angle a when starting projection is calculated1, in order to avoid driver is interfered in projection, when projection
Between take 2 seconds, projection pattern is located at vehicle front L1Place calculates as follows:
L1=2 × v
Original state is reset to after projection immediately, is prepared as next target vehicle projection.
5. a kind of control method of the crossing safety auxiliary system based on line holographic projections characterized by comprising
The vehicle area that whether faces a difficult selection is judged using sound wave measuring principle, and line holographic projections principle is combined to carry out vehicle
Speed guidance and warning；
The traffic lights of the ground lamp group being laid in below the graticule of pavement and control walk are consistent, and are being handed over
The green light for controlling ground lamp groups for 3~5 seconds before the green light of ventilating signal lamp terminates flashes；
The traffic lights of mat formation the auxiliary lamp group on the left side channelizing line in every lane and control walk are kept one
It causes, and the green light flashing of 3~5 seconds control auxiliary lamp groups before the green light of traffic lights terminates.
6. the control method of the crossing safety auxiliary system based on line holographic projections as claimed in claim 5, which is characterized in that
It is described that the vehicle area that whether faces a difficult selection is judged using sound wave measuring principle, and line holographic projections principle is combined to carry out vehicle
Speed guidance and warning；It specifically includes:
Using the forward speed v of the sound wave velocity measuring technique acquisition target vehicle and its distance L apart from parking money；
Data processing system with the control system of the traffic lights of control walk by being connected to obtain real-time green light
Remaining time TgWith yellow time Ty；
The acceleration a of suitable intersection width R and vehicle is set according to the different situations of each intersection；
It calculates target vehicle and passable distance S is travelled with present speed within green light remaining timeIt is green, minimum safe stopping distance
SStop, in yellow time can by distance SIt is yellow, distance S at the end of green light apart from stop lineIt is surplus, calculation expression is as follows:
SIt is green=Tg×v
SIt is surplus=L-SIt is green
SIt is yellow=Ty×v
In formula: t is the reaction time of driver；A is the deceleration of vehicle；If SIt is green> L, then target vehicle can be before green light terminates
Cross stop line；If SIt is green< L, then target vehicle cannot cross stop line before green light terminates；
At the end of green light, target vehicle other than minimum safe stopping distance, then can safety parking, do not need projection police
Show, meet condition are as follows:
SIt is surplus>SStop
If being unsatisfactory for above-mentioned condition, whether intersection can be sailed out of with the advance of former speed before amber light terminates according to vehicle, sentenced
Whether disconnected target vehicle has the tendency that the region that faces a difficult selection；Work as SIt is yellow>SIt is surplusWhen+R+l, target vehicle can be safe before amber light terminates
By intersection, the prompt for keeping former speed traveling is provided；Work as SIt is yellow<SIt is surplusWhen+R+l, target vehicle, which has been fallen into, to face a difficult selection
The trend in region；
The distance of vehicle distances stop line is L when due to acquisition speed, is avoided that the region that faces a difficult selection if taking speed change measure,
Need to judge current speed and maximum limitation speed vlimRelationship:
If v >=vlim, project ramp to stop mark；
If v < vlim, then the distance S that yellow time can pass through when vehicle is advanced with intersection maximum limitation speed is calculatedAdd, calculate such as
Under:
Work as SAdd>SIt is surplusWhen+R+l, illustrates that driver accelerates to advance at this time and is avoided that, into dilemma zone, projection accelerates through mark,
Otherwise driver's pre-decelerating is reminded, avoids driving into minimum safe stopping distance.
7. the control method of the crossing safety auxiliary system based on line holographic projections as claimed in claim 6, which is characterized in that
The projection, specifically includes:
When target vehicle needs to project, angle a when starting projection is calculated1, in order to avoid driver is interfered in projection, when projection
Between take 2 seconds, projection pattern is located at vehicle front L1Place calculates as follows:
L1=2 × v
Original state is reset to after projection immediately, is prepared as next target vehicle projection.
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Application publication date: 20190726 |