CN110164142A - A kind of road limit for height system and method - Google Patents
A kind of road limit for height system and method Download PDFInfo
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- CN110164142A CN110164142A CN201910418772.XA CN201910418772A CN110164142A CN 110164142 A CN110164142 A CN 110164142A CN 201910418772 A CN201910418772 A CN 201910418772A CN 110164142 A CN110164142 A CN 110164142A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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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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- 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
- G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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Abstract
The invention discloses a kind of road limit for height systems, comprising: laser sensor: for acquiring the horizontal distance information between superelevation object and height-limiting frame in real time；Level-one distance judgment module: for when superelevation object is into the first safe distance range, output image taking instruction；Photographic device: for instructing starting according to image taking and acquiring image information；Picture recognition module: for exporting level-one alarm command when identifying superelevation object is Overheight Vehicles；Level-one prior-warning device is for exporting one stage signal early warning；A kind of road limit for height method is also disclosed, comprising steps of obtaining horizontal distance information；When horizontal distance information is less than or equal to preset first distance threshold value, the instruction of output image taking is to start photographic device acquisition image information；When identifying superelevation object is Overheight Vehicles, level-one alarm command is exported；One stage signal early warning is carried out according to level-one alarm command.The present apparatus and method can be timely and accurately to Overheight Vehicles early warning.
Description
Technical field
The invention belongs to road traffic facility technical fields, and in particular to a kind of road limit for height system and method.
Background technique
With economic continuous development, China Transportation Industry increasingly developed growth is the viaduct in one side city, overhead
The means of transportation such as bridge, overpass, freeway tunnel are more and more: on the other hand, the large-scale load-carrying vehicle quantity on road
Also constantly rise.Because driver is careless or to overall height error in judgement, leads to ultrahigh wagon Ka Qiao, hits the traffic accidents such as tunnel
It happens occasionally.
In order to protect the means of transportation such as viaduct, tunnel, traditional method is the setting vehicle height-limiting frame on highway, is being limited
Overhead upper setting limit for height warning mark.Height-limiting frame on present highway is mostly that metal is welded, and driver could not once pay attention to
It cannot judge to limit for height mark or promptly and accurately vehicle super-high, will be collided with height-limiting frame, still result in traffic accident, make
At danger.Thus, existing road height limiter, which exists, is unable to judge accurately Overheight Vehicles position, and according to Overheight Vehicles position
The problem of timely and effectively reminding driver.
Summary of the invention
In order to solve the above technical problems, there is provided a kind of road limit for height systems for an object of the present invention, can be quasi-
Overheight Vehicles position really is obtained, and driver is timely and effectively reminded according to Overheight Vehicles position.
The second object of the present invention is to provide a kind of road limit for height method, superelevation vehicle can accurately be obtained based on this method
Position, and driver is timely and effectively reminded according to Overheight Vehicles position.
Road limit for height system of the invention uses following technical scheme:
A kind of road limit for height system, comprising:
Laser sensor: being more than that height-limiting frame is high for acquiring in real time on the crossbeam for being fixedly arranged on height-limiting frame towards direction to the car
Horizontal distance information between the superelevation object and height-limiting frame of degree；
Level-one distance judgment module: if being less than or equal to preset first distance threshold for collected horizontal distance information
When value, then judge that the superelevation object for into the first safe distance range, and exports image taking instruction；
Photographic device: being arranged towards direction to the car, for being started according to described image shooting instruction, to acquire superelevation object
Image information；
Picture recognition module: for identifying superelevation kind of object according to image information, and the superelevation object is being identified
When for Overheight Vehicles, level-one alarm command is exported；
Level-one prior-warning device: for exporting one stage signal early warning according to the level-one alarm command.
Further, the level-one prior-warning device includes the light emitting diode on the height-limiting frame, and described luminous two
Pole pipe is used to be shone according to the level-one alarm command.
Further, the front of the height-limiting frame is equipped with hanger bracket；The road limit for height system further include:
Second level distance judgment module, for the collected horizontal distance information be less than or equal to preset second away from
When from threshold value, judge that the superelevation object for into the second safe distance range, and exports second level alarm command；Described second away from
It is less than first distance threshold value from threshold value；
Elastomeric objects are set on the hanger bracket, for being fallen automatically according to the second level alarm command, and the elasticity
Object is located at the window locations of the Overheight Vehicles after falling.
Further, further includes:
Three-level distance judgment module: for being less than or equal to default third distance in the collected horizontal distance information
When threshold value, judge that the superelevation object for into third safe distance range, and exports three-level alarm command；The third distance
Threshold value is less than second distance threshold value；
Air bag, for being automatically opened according to the three-level alarm command on the height-limiting frame.
Further, further includes:
Distance threshold computing module: for when identifying the superelevation object is Overheight Vehicles, according to it is described it is horizontal away from
Second distance threshold value and are determined from the speed that information calculates the Overheight Vehicles, and according to the speed and weather conditions information
Three distance thresholds.
Further, further includes:
License plate number image capture module, for obtaining the superelevation when identifying the superelevation object is Overheight Vehicles
The license plate number image information of vehicle；
Vehicle cab recognition module: for extracting corresponding license plate number according to the license plate number image information, and according to
License plate number inquires its vehicle model information in preset model data library；Have between the license plate number and the vehicle model information corresponding
Relationship；
Distance threshold adjusts module, for adjusting the second distance threshold value and third apart from threshold according to the vehicle model information
Value.
Further, further includes:
The input terminal of PLC, the PLC are separately connected with level-one distance judgment module, picture recognition module, output end and institute
State photographic device, level-one prior-warning device is separately connected.
Road limit for height method of the invention uses following technical scheme:
A kind of road limit for height method uses above-mentioned road limit for height system, comprising the following steps:
Obtain the horizontal distance information between superelevation object and height-limiting frame in real time by laser sensor；
If collected horizontal distance information is less than or equal to preset first distance threshold value, the superelevation object is judged
Body be into the first safe distance range, and export image taking instruction；
Start photographic device according to described image shooting instruction, to acquire superelevation object image information；
Superelevation kind of object is identified according to image information, and when identifying the superelevation object is Overheight Vehicles, output
Level-one alarm command, so that level-one prior-warning device exports one stage signal early warning according to the level-one alarm command.
Further, it further comprises the steps of:
When the collected horizontal distance information is less than or equal to preset second distance threshold value, the superelevation is judged
Object is and second level alarm command to be exported, so that elastomeric objects refer to according to the second level early warning into the second safe distance range
Order fall automatically, and the elastomeric objects fall after positioned at the Overheight Vehicles window locations；The second distance threshold value is small
In first distance threshold value；
When the collected horizontal distance information is less than or equal to default third distance threshold, the superelevation object is judged
Body is and three-level alarm command to be exported, so that air bag is according to the three-level alarm command into third safe distance range
It automatically opens；The third distance threshold is less than second distance threshold value.
Further, it further comprises the steps of:
When identifying the superelevation object is Overheight Vehicles, the Overheight Vehicles are calculated according to the horizontal distance information
Speed, and second distance threshold value and third distance threshold are determined according to the speed and weather conditions information；
When identifying the superelevation object is Overheight Vehicles, the license plate number image information of the Overheight Vehicles is obtained；
Extract corresponding license plate number according to the license plate number image information, and according to the license plate number in preset vehicle
Its vehicle model information is inquired in database；There is corresponding relationship between the license plate number and the vehicle model information；
The second distance threshold value and third distance threshold are adjusted according to the vehicle model information.
Compared with prior art, the invention has the benefit that
1) limit for height system and method for the invention is obtained between superelevation object and height-limiting frame in real time by laser sensor
Horizontal distance, and whether enter the first safe distance model by comparing horizontal distance and first distance threshold decision superelevation object
It encloses；When superelevation object enter the first safe distance range when, first calling photographic device shooting superelevation object image information with
The case where excluding superelevation object non-Overheight Vehicles；Only after determining superelevation object is Overheight Vehicles, triggering level-one prior-warning device is defeated
One stage signal early warning out.Its one side can promptly and accurately remind driver that its vehicle super-high driven reduces vehicle due to superelevation
The probability of generation accident；On the other hand, it by tentatively being judged superelevation kind of object, can effectively exclude because of bird, plastics
The false triggerings such as bag improve the early warning efficiency and early warning accuracy of device, and it is only when Overheight Vehicles enter safe distance range
Early warning is carried out when interior, it is possible to reduce influence when progress signal early warning to neighbouring resident.
2) further early warning and protection are carried out by elastomeric objects, air bag, on the one hand safer can accurately had
The driver of effect ground warning Overheight Vehicles；On the other hand it can also reduce when vehicle super-high accident occurs to Overheight Vehicles and its interior drive
The damage for the person of sailing.
3) by adjusting second distance threshold value and third apart from threshold according to the speed, vehicle and weather conditions of Overheight Vehicles
Value, enables elastomeric objects and air bag that effectively driver is reminded and protected much sooner.
4) limit for height system and method for the invention can be applied on road on existing gantry height-limiting frame, so that investment
Relative inexpensiveness.
Detailed description of the invention
Technology of the invention is described in further detail with reference to the accompanying drawings and detailed description:
Fig. 1 is the schematic diagram of road limit for height system of the present invention；
Fig. 2 is the structural plan of road limit for height system of the present invention；
Fig. 3 is the structural schematic diagram of height-limiting frame of the present invention；
Fig. 4 is second distance threshold value of the present invention and third distance threshold and length velocity relation schematic diagram.
Description of symbols:
1, cloud platform；11, level-one distance judgment module；12, second level distance judgment module；13, three-level distance judgment module；
14, distance threshold computing module；15, picture recognition module；16, license plate number image capture module；17, vehicle cab recognition module；18,
Distance threshold adjusts module；2,PLC；3, laser sensor, 4, photographic device；5, multistage prior-warning device；51, Light-Emitting Diode；
52, elastomeric objects；53, air bag；6, height-limiting frame, 7, hanger bracket.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
The invention discloses a kind of road limit for height systems, as shown in figures 1-4, comprising:
Laser sensor 3: being fixedly arranged on the crossbeam of height-limiting frame 6 towards direction to the car, is more than height-limiting frame 6 for acquiring in real time
Horizontal distance information between the superelevation object and height-limiting frame 6 of height；
Level-one distance judgment module 11: if being less than or equal to preset first distance for collected horizontal distance information
When threshold value, then judge that the superelevation object for into the first safe distance range, and exports image taking instruction；
Photographic device 4: being arranged towards direction to the car, for being started according to described image shooting instruction, to acquire superelevation object
Body image information；
Picture recognition module 15: for identifying superelevation kind of object according to image information, and the superelevation object is being identified
When body is Overheight Vehicles, level-one alarm command is exported；
Level-one prior-warning device: for exporting one stage signal early warning according to the level-one alarm command.The level-one early warning dress
The light emitting diode including being set on the height-limiting frame 6 is set, the light emitting diode is used to send out according to the level-one alarm command
Light.
The front of the height-limiting frame 6 is equipped with hanger bracket 7；The road limit for height system further include:
Distance threshold computing module 14: for identify the superelevation object be Overheight Vehicles when, according to the level
Range information calculates the speed of the Overheight Vehicles, and according to the speed and weather conditions information determine second distance threshold value and
Third distance threshold.
Wherein, second distance threshold value and third distance threshold are in a linear relationship with the speed of superelevation object respectively；It is linear
Relational graph is as shown in Figure 4.
License plate number image capture module 16 is described super for obtaining when identifying the superelevation object is Overheight Vehicles
The license plate number image information of high vehicle；
Vehicle cab recognition module 17: for extracting corresponding license plate number according to the license plate number image information, and according to institute
It states license plate number and inquires its vehicle model information in preset model data library；Between the license plate number and the vehicle model information have pair
It should be related to；
Distance threshold adjusts module 18, for adjusting the second distance threshold value and third distance according to the vehicle model information
Threshold value.
Second level distance judgment module 12, for being less than or equal to preset second in the collected horizontal distance information
When distance threshold, judge that the superelevation object for into the second safe distance range, and exports second level alarm command；Described second
Distance threshold is less than first distance threshold value；
Elastomeric objects 52 are set on the hanger bracket 7, for being fallen automatically according to the second level alarm command, and it is described
Elastomeric objects 52 are located at the window locations of the Overheight Vehicles after falling.The preferred elastic pellet of elastomeric objects 52.
Three-level distance judgment module 13: for the collected horizontal distance information be less than or equal to default third away from
When from threshold value, judge that the superelevation object for into third safe distance range, and exports three-level alarm command；The third away from
It is less than second distance threshold value from threshold value；
Air bag 53, for being automatically opened according to the three-level alarm command on the height-limiting frame 6.
Light-Emitting Diode 51, elastomeric objects 52 and air bag 53 collectively form multistage prior-warning device 5, multistage early warning dress
Setting 5 can successively be triggered according to horizontal distance signal.
Wherein, level-one distance judgment module 11, second level distance judgment module 12, three-level distance judgment module 13, apart from threshold
It is worth computing module 14, picture recognition module 15, license plate number image capture module 16, vehicle cab recognition module 17 and distance threshold adjustment
Module 18, which can be concentrated, to be operated in cloud platform 1.The instruction output end mouth of cloud platform 1 connects PLC2 (Programmable Logic
Controller, i.e. programmable controller), the input terminal and level-one distance judgment module 11, picture recognition module of the PLC2
It 15 is separately connected, second level distance judgment module 12, three-level distance judgment module 13, output end and the photographic device 4, level-one are pre-
Alarm device, second level prior-warning device, three-level prior-warning device are separately connected.
Road limit for height system of the invention obtains the water between superelevation object and height-limiting frame 6 by laser sensor 3 in real time
Flat distance, and whether enter the first safe distance range by comparing horizontal distance and first distance threshold decision superelevation object；
When superelevation object enters the first safe distance range, calling photographic device 4 shoots the image information of superelevation object to arrange first
The case where Overheight Vehicles non-except superelevation object；Only after determining superelevation object is Overheight Vehicles, triggering level-one prior-warning device output
One stage signal early warning.Its one side can prompting driver promptly and accurately its vehicle super-high driven reduce vehicle and sent out because of superelevation
Make trouble thus probability；On the other hand, it by tentatively being judged superelevation kind of object, can effectively exclude because of bird, polybag
Etc. false triggerings improve the early warning efficiency and early warning accuracy of device, and it is only when Overheight Vehicles enter within the scope of safe distance
Shi Jinhang early warning, it is possible to reduce influence when progress signal early warning to neighbouring resident.
And road limit for height system of the invention is carried out further obtaining early warning and be prevented by elastomeric objects 52, air bag 53
Shield, on the one hand being capable of the safer driver for accurately and efficiently warning Overheight Vehicles；On the other hand vehicle super-high thing can also be reduced
Therefore damage when occurring to Overheight Vehicles and its interior driver.
A kind of road limit for height method uses above-mentioned road limit for height system, comprising the following steps:
S1: the horizontal distance information between superelevation object and height-limiting frame 6 is obtained in real time by laser sensor 3；
S2: if collected horizontal distance information is less than or equal to preset first distance threshold value, judge described super
High object be into the first safe distance range, and export image taking instruction；
S3: started according to described image shooting instruction, to acquire superelevation object image information；
S4: identifying superelevation kind of object according to image information, and when identifying the superelevation object is Overheight Vehicles, defeated
Level-one alarm command out, so that level-one prior-warning device exports one stage signal early warning according to the level-one alarm command.
S5: when identifying the superelevation object is Overheight Vehicles, determining second distance threshold value and third distance threshold, has
Body the following steps are included:
S51: the speed of the Overheight Vehicles is calculated according to the horizontal distance information, and vaporous according to the speed and day
Condition information determines second distance threshold value and third distance threshold；
Wherein, second distance threshold value and third distance threshold are in a linear relationship with the speed of superelevation object respectively；It is linear
Relational graph is as shown in Figure 4.
S52: the license plate number image information of the Overheight Vehicles is obtained；
S53: extracting corresponding license plate number according to the license plate number image information, and according to the license plate number preset
Its vehicle model information is inquired in model data library；There is corresponding relationship between the license plate number and the vehicle model information；
S54: the second distance threshold value and third distance threshold are adjusted according to the vehicle model information.S6: collected
The horizontal distance information be less than or equal to preset second distance threshold value when, judge the superelevation object be into second safely
Distance range, and second level alarm command is exported, so that elastomeric objects 52 fall automatically according to the second level alarm command, and described
Elastomeric objects 52 are located at the window locations of the Overheight Vehicles after falling；The second distance threshold value is less than first distance threshold value；
S7: when the collected horizontal distance information is less than or equal to default third distance threshold, judge described super
High object is and three-level alarm command to be exported, so that air bag is according to the three-level early warning into third safe distance range
Instruction automatically opens；The third distance threshold is less than second distance threshold value.
The road limit for height system and method for invention is illustrated combined with specific embodiments below.
Embodiment 1
Limit for height system of the invention by laser sensor 3, photographic device 4 (high-definition camera), PLC2, cloud platform 1 and
It is connected to the multistage prior-warning device 5 connecting by PLC2 with cloud platform 1, which includes being set on height-limiting frame 6
Light emitting diode and air bag 53, the elastomeric objects 52 on hanger bracket 7, wherein before hanger bracket 7 is set to height-limiting frame 6
Side, hanger bracket 7 is L-shaped, and laser sensor 3 is high frequency lasers sensor, and air bag 53 is active air bag.
Height-limiting frame 6 is gantry height-limiting frame, You Yigen crossbeam and two upright bars composition, and surface is coated with yellow black alternate reflective
Paint, along 6 edge of gantry height-limiting frame uniformly gather light emitting diode, and crossbeam both ends be equipped with active air bag 53.
High frequency lasers sensor 3 is mounted on 6 crossbeam of gantry height-limiting frame, and the probe of laser sensor 3 is concordant with crossbeam bottom, towards
Direction to the car constantly carries out ranging, and data are uploaded to cloud platform 1 in real time and are handled.High-definition camera is mounted on gantry
Height-limiting frame 6 towards direction to the car nearby L-type hanger bracket 7 crossbeam center, towards direction to the car.When high frequency lasers sensor 3
It when having monitored Overheight Vehicles, takes pictures to Overheight Vehicles, and photo is uploaded cloud platform 1 in real time and is handled.L-type suspension
The crossbeam of frame 7 is equipped with can fall elastic pellet automatically.
The signal output end (output port) of PLC2 is separately connected light emitting diode, active air bag, high-definition camera
Head, the signal input part for falling elastic sphere automatically, cloud platform 1 pass through to high frequency lasers sensor 3 and high-definition camera hair
The data sent back are handled, and are realized by sending order to PLC2 signal input part (input port) to whole system
It automatically controls.Specific control process is as follows:
1, high frequency lasers sensor 3 measure numerical value and upload to cloud platform 1 in real time, and 1 logarithm of cloud platform is judged, when
When numerical value is equal to or less than preset first order distance threshold, illustrate the in limit for height section apart from gantry height-limiting frame 6
There are Overheight Vehicles within the scope of level-one safe distance, at this point, cloud platform 1 sends starting high-definition camera to PLC2 signal input part
Order.
2, high-definition camera starts to take pictures, and uploads to cloud platform 1 in real time.Cloud platform 1 sends high-definition camera
A large amount of photos back carry out image recognition processing, in conjunction with the data that high frequency lasers sensor 3 uploads in real time, to triggering system
Object carries out figure identification investigation, judges whether to be the objects such as polybag, bird.After a possibility that excluding false triggering, cloud platform 1
Starting light emitting diode order is sent to PLC2 signal input part, the constantly highlighted flashing of the light emitting diode on gantry height-limiting frame 6,
Alerting drivers, vehicle super-high.
3, it is handled by the data uploaded in real time to high frequency lasers sensor 3, calculates the vehicle of Overheight Vehicles at this time
Speed.
Continue to carry out image recognition processing to a large amount of photos simultaneously, to identify the license plate number of Overheight Vehicles, and passes through vehicle
The trade mark compares the database of cloud platform 1, inquires the vehicle of current Overheight Vehicles.
4, cloud platform 1 calls corresponding second according to the vehicle of current Overheight Vehicles, speed and the weather condition on the same day
Grade distance threshold, third level distance threshold, are in real time compared the distance of Overheight Vehicles and gantry height-limiting frame 6.The second level away from
It can be changed according to the variation of current Overheight Vehicles speed from threshold value, third level distance threshold.It is a kind of for certain as shown in Figure 4
Vehicle is in different weather, trend that the second level, third level distance threshold change according to the variation of speed.Due to transport
The truck of container will appear headstock not superelevation, but the case where compartment superelevation, for such vehicle, second level distance threshold
Setting should take into account length of wagon, i.e., the second level distance threshold of such vehicle wants bigger than normal.
5, when the distance of Overheight Vehicles and gantry height-limiting frame 6 is equal to or less than second level distance threshold, illustrate superelevation
Vehicle enters within the scope of the second level safe distance apart from gantry height-limiting frame 6 in limit for height section, and Overheight Vehicles must be adopted at this time
Emergency braking is taken, is possible to stop before L-type hanger bracket 7, cloud platform 1 is sent to PLC2 signal input part falls elasticity automatically
Sphere order.Elastic sphere on L-type hanger bracket 7 drops to Overheight Vehicles vehicle window height and position, forces driver's emergency braking.
Elastic sphere is fabricated from a flexible material, and vehicle collision not will cause actual harm.
6, when the distance of Overheight Vehicles and gantry height-limiting frame 6 is equal to or less than third level distance threshold, illustrate superelevation
Vehicle enters within the scope of the third level safe distance apart from gantry height-limiting frame 6 in limit for height section, and Overheight Vehicles must be adopted at this time
Emergency braking is taken, is possible to stop before gantry height-limiting frame 6, cloud platform 1 sends to 2 signal input part of PLC2 and opens safety
Air bag 53 is ordered, the expansion of air bag inflation, is covered on 6 front of gantry height-limiting frame, when Overheight Vehicles and gantry height-limiting frame 66 are sent out
When raw collision, plays the role of buffering energy-absorbing, mitigate the injures and deaths of personnel and the damage of vehicle, height-limiting frame 6.
Other contents of road limit for height system and method for the present invention are referring to the prior art, and details are not described herein.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, therefore
Without departing from the technical solutions of the present invention, according to the technical essence of the invention it is to the above embodiments it is any modification,
Equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of road limit for height system characterized by comprising
Laser sensor: on the crossbeam for being fixedly arranged on height-limiting frame towards direction to the car, for being acquired in real time more than height-limiting frame height
Horizontal distance information between superelevation object and height-limiting frame；
Level-one distance judgment module: if being less than or equal to preset first distance threshold value for collected horizontal distance information
When, then judge that the superelevation object for into the first safe distance range, and exports image taking instruction；
Photographic device: being arranged towards direction to the car, for being started according to described image shooting instruction, to acquire superelevation subject image
Information；
Picture recognition module: for identifying superelevation kind of object according to image information, and identifying that the superelevation object is super
When high vehicle, level-one alarm command is exported；
Level-one prior-warning device: for exporting one stage signal early warning according to the level-one alarm command.
2. road limit for height system according to claim 1, which is characterized in that the level-one prior-warning device includes set on described
Light emitting diode on height-limiting frame, the light emitting diode are used to be shone according to the level-one alarm command.
3. road limit for height system according to claim 1, which is characterized in that the front of the height-limiting frame is equipped with hanger bracket；
The road limit for height system further include:
Second level distance judgment module, for being less than or equal to preset second distance threshold in the collected horizontal distance information
When value, judge that the superelevation object for into the second safe distance range, and exports second level alarm command；The second distance threshold
Value is less than first distance threshold value；
Elastomeric objects are set on the hanger bracket, for being fallen automatically according to the second level alarm command, and the elastomeric objects
It is located at the window locations of the Overheight Vehicles after falling.
4. road limit for height system according to claim 3, which is characterized in that further include:
Three-level distance judgment module: for being less than or equal to default third distance threshold in the collected horizontal distance information
When, judge that the superelevation object for into third safe distance range, and exports three-level alarm command；The third distance threshold
Less than second distance threshold value；
Air bag, for being automatically opened according to the three-level alarm command on the height-limiting frame.
5. road limit for height system according to claim 1, which is characterized in that further include:
Distance threshold computing module: for being believed according to the horizontal distance when identifying the superelevation object is Overheight Vehicles
Breath calculates the speed of the Overheight Vehicles, and according to the speed and weather conditions information determine second distance threshold value and third away from
From threshold value.
6. road limit for height system according to claim 5, which is characterized in that further include:
License plate number image capture module, for obtaining the Overheight Vehicles when identifying the superelevation object is Overheight Vehicles
License plate number image information；
Vehicle cab recognition module: for extracting corresponding license plate number according to the license plate number image information, and according to the license plate
Number its vehicle model information is inquired in preset model data library；There is corresponding close between the license plate number and the vehicle model information
System；
Distance threshold adjusts module, for adjusting the second distance threshold value and third distance threshold according to the vehicle model information.
7. road limit for height system described according to claim 1~any one of 6, which is characterized in that further include:
The input terminal of PLC, the PLC are separately connected with level-one distance judgment module, picture recognition module, and output end is taken the photograph with described
As device, level-one prior-warning device are separately connected.
8. a kind of road limit for height method, which is characterized in that using road limit for height system described in any one of claim 1~7,
The following steps are included:
Obtain the horizontal distance information between superelevation object and height-limiting frame in real time by laser sensor；
If collected horizontal distance information is less than or equal to preset first distance threshold value, judge that the superelevation object is
Into the first safe distance range, and export image taking instruction；
Start photographic device according to described image shooting instruction, to acquire superelevation object image information；
Superelevation kind of object is identified according to image information, and when identifying the superelevation object is Overheight Vehicles, exports level-one
Alarm command, so that level-one prior-warning device exports one stage signal early warning according to the level-one alarm command.
9. road limit for height method according to claim 8, which is characterized in that further comprise the steps of:
When the collected horizontal distance information is less than or equal to preset second distance threshold value, the superelevation object is judged
To enter the second safe distance range, and export second level alarm command so that elastomeric objects according to the second level alarm command from
It is dynamic to fall, and the elastomeric objects fall after be located at the window locations of the Overheight Vehicles；The second distance threshold value is less than
One distance threshold；
When the collected horizontal distance information is less than or equal to default third distance threshold, judge that the superelevation object is
Into third safe distance range, and three-level alarm command is exported, so that air bag is automatic according to the three-level alarm command
It opens；The third distance threshold is less than second distance threshold value.
10. road limit for height method according to claim 8, which is characterized in that further comprise the steps of:
When identifying the superelevation object is Overheight Vehicles, the vehicle of the Overheight Vehicles is calculated according to the horizontal distance information
Speed, and second distance threshold value and third distance threshold are determined according to the speed and weather conditions information；
When identifying the superelevation object is Overheight Vehicles, the license plate number image information of the Overheight Vehicles is obtained；
Extract corresponding license plate number according to the license plate number image information, and according to the license plate number in preset model data
Its vehicle model information is inquired in library；There is corresponding relationship between the license plate number and the vehicle model information；
The second distance threshold value and third distance threshold are adjusted according to the vehicle model information.
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