CN110211382A - Automobile speed limit method for early warning and system - Google Patents
Automobile speed limit method for early warning and system Download PDFInfo
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- CN110211382A CN110211382A CN201910503347.0A CN201910503347A CN110211382A CN 110211382 A CN110211382 A CN 110211382A CN 201910503347 A CN201910503347 A CN 201910503347A CN 110211382 A CN110211382 A CN 110211382A
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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
- G08B21/20—Status alarms responsive to moisture
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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
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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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
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
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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
- G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/065—Traffic control systems for road vehicles by counting the vehicles in a section of the road or in a parking area, i.e. comparing incoming count with outgoing count
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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
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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
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
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Abstract
The present invention provides a kind of automobile speed limit method for early warning and system.This method comprises: obtaining traffic information and calculating road conditions affecting parameters according to traffic information, obtain stream of people's car flow information and calculate stream of people's wagon flow affecting parameters according to stream of people's car flow information；Obtain wind speed information and according to wind speed information calculation of wind speed affecting parameters, acquisition aerial temperature and humidity information and according to temperature and humidity information calculating temperature and humidity affecting parameters；Early warning speed is calculated according to road conditions affecting parameters, stream of people's wagon flow affecting parameters, air speed influence parameter and temperature and humidity affecting parameters, and early warning speed is shown；The current vehicle speed of current vehicle is obtained, and judges whether current vehicle speed is greater than early warning speed；When determining current vehicle speed greater than early warning speed, prompt alarm is issued.The present invention is calculated corresponding early warning speed automatically, so as to make safe speed prompt to driver, improves the accuracy of speed limit early warning by being detected based on road conditions detection, stream of people's vehicle flux monitor, wind speed measurement and environmental parameter.
Description
Technical field
The present invention relates to automobile technical field more particularly to a kind of automobile speed limit method for early warning and systems.
Background technique
With the raising of Chinese national economy, the prosperity of Automobile Market, automobile offers convenience same in people's life
When, also bring more and more traffic accidents.Most of severe traffic accidents are in the case of automobile speed is out of control
It is caused, therefore, a kind of speed limit method for early warning is developed, can technically improve the safety of car steering, to the full extent in advance
Anti- traffic accident.
Existing speed limit method for early warning, generally by the speed per hour of velocity sensor real-time detection automobile, and by velocity amplitude
It is compared with preset threshold speed, when threshold speed of the automobile speed per hour up to or over setting, passes through voice
Etc. modes alarm.But the mode of this overspeed alarming is only capable of being compared according to the pre-set threshold speed of user, Bu Nengyou
The analysis and setting of the threshold speed that intelligence is carried out according to pavement state and ambient condition of effect, when there are ponding or icing in road surface
When, speed limit value should be less than the pre-set threshold speed of user, and therefore, existing speed limit method for early warning is easy to cause unexpectedly
Occur, speed limit early warning accuracy is low.
Summary of the invention
The technical problem to be solved by the present invention is to provide one kind to pass through based on road conditions detection, stream of people's vehicle flux monitor, wind speed measurement
It is detected with environmental parameter, to improve the automobile speed limit method for early warning and system of speed limit early warning accuracy.
In order to solve the above technical problems, automobile speed limit method for early warning provided by the invention, which comprises
It obtains traffic information and road conditions affecting parameters is calculated according to the traffic information, obtain stream of people's car flow information and according to described
Stream of people's car flow information calculates stream of people's wagon flow affecting parameters；
Obtain wind speed information and according to the wind speed information calculation of wind speed affecting parameters, acquisition aerial temperature and humidity information and according to institute
It states temperature and humidity information and calculates temperature and humidity affecting parameters；
According to the road conditions affecting parameters, stream of people's wagon flow affecting parameters, the air speed influence parameter and the temperature and humidity shadow
It rings parameter and calculates early warning speed, and the early warning speed is shown；
The current vehicle speed of current vehicle is obtained, and judges whether the current vehicle speed is greater than the early warning speed；
When determining the current vehicle speed greater than the early warning speed, prompt alarm is issued.
Preferably, it is described judge the step of whether current vehicle speed is greater than the early warning speed after, the method is also
Include:
When determining the current vehicle speed and not being greater than the early warning speed, between calculating speed threshold value and the current vehicle speed
Speed difference；
When determining the speed difference less than difference threshold, the engine oil-break of the current vehicle is controlled.
Preferably, the acquisition traffic information and according to the traffic information calculate road conditions affecting parameters the step of include:
The two-dimentional fault image of current road is obtained by video camera and laser；
The two-dimentional fault image is converted into three-D profile image, and according to the three-D profile image calculate road bump,
Track and fracture parameters, to obtain the road conditions affecting parameters.
Preferably, the acquisition stream of people car flow information and according to stream of people's car flow information calculate stream of people's wagon flow affecting parameters
The step of include:
The mobile phone signal quantity in region locating for the current vehicle is obtained, to obtain stream of people's parameter；
The traffic process being in described in the current vehicle, region average speed and vehicle density are obtained, and according to the traffic
Process, the region average speed and the vehicle density calculate wagon flow parameter.
Preferably, the acquisition wind speed information and according to the step of wind speed information calculation of wind speed affecting parameters include:
The current wind speed of the current vehicle is obtained, and running resistance is calculated according to the current wind speed, to obtain the wind speed
Affecting parameters.
Preferably, described to obtain aerial temperature and humidity information and temperature and humidity affecting parameters are calculated according to the temperature and humidity information
Step includes:
The Current Temperatures of the current vehicle local environment are obtained, and when determining the Current Temperatures less than temperature threshold,
Determine that road surface has frozen, exports pre-warning signal；
The current humidity of the current vehicle local environment is obtained, and when determining the current humidity greater than humidity threshold,
Determine that there is ponding on road surface, exports the pre-warning signal；
The number of the pre-warning signal is calculated, to obtain the temperature and humidity affecting parameters.
Preferably, the step of sending prompt alarm includes:
The instrument board for controlling the current vehicle is persistently flashed according to prefixed time interval, and is controlled loudspeaker and carried out voice
Prompt alarm.
Compared with the relevant technologies, automobile speed limit method for early warning provided by the invention, which has the following beneficial effects:, passes through base
It is detected in road conditions detection, stream of people's vehicle flux monitor, wind speed measurement and environmental parameter, corresponding early warning speed is calculated automatically, so as to give
Driver makes safe speed prompt, improves the accuracy of speed limit early warning, and prevent due to only with pre-set speed
Degree threshold value and current vehicle speed compare the low phenomenon of speed limit early warning accuracy caused by alarm.
The another object of the embodiment of the present invention is to provide a kind of automobile speed limit early warning system, the system comprises:
Road conditions parameter calculating module, for obtaining traffic information and calculating road conditions affecting parameters according to the traffic information；
Stream of people's wagon flow parameter calculating module, for obtaining stream of people's car flow information and calculating stream of people's vehicle according to stream of people's car flow information
Flow affecting parameters；
Wind speed parameter computing module, for obtaining wind speed information and according to the wind speed information calculation of wind speed affecting parameters；
Temperature and humidity parameter calculating module, for obtaining aerial temperature and humidity information and calculating temperature and humidity shadow according to the temperature and humidity information
Ring parameter；
Early warning speed calculation module, for according to the road conditions affecting parameters, stream of people's wagon flow affecting parameters, the wind speed shadow
It rings parameter and the temperature and humidity affecting parameters calculates early warning speed, and the early warning speed is shown；
Alarm module is prompted, for obtaining the current vehicle speed of current vehicle, and it is described pre- to judge whether the current vehicle speed is greater than
Alert speed；When determining the current vehicle speed greater than the early warning speed, prompt alarm is issued.
Preferably, the automobile speed limit early warning system further include:
Oil-feeding control module, for when determining the current vehicle speed and not being greater than the early warning speed, calculating speed threshold value with
Speed difference between the current vehicle speed；When determining the speed difference less than difference threshold, control is described to work as front truck
Engine oil-break.
Preferably, the road conditions parameter calculating module is also used to:
The two-dimentional fault image of current road is obtained by video camera and laser；
The two-dimentional fault image is converted into three-D profile image, and according to the three-D profile image calculate road bump,
Track and fracture parameters, to obtain the road conditions affecting parameters.
Detailed description of the invention
Fig. 1 is the flow chart for the automobile speed limit method for early warning that first embodiment of the invention provides；
Fig. 2 is the flow chart for the automobile speed limit method for early warning that second embodiment of the invention provides；
Fig. 3 is the structural schematic diagram for the automobile speed limit early warning system that third embodiment of the invention provides.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment one
Referring to Fig. 1, be the flow chart for the automobile speed limit method for early warning that first embodiment of the invention provides, comprising steps of
Step S10 obtains traffic information and calculates road conditions affecting parameters according to the traffic information, obtains stream of people's car flow information simultaneously
Stream of people's wagon flow affecting parameters are calculated according to stream of people's car flow information；
Wherein, flatness, track and crack are evaluation most important three parameters of pavement quality, directly affect highway and traveling
Service life, the energy consumption of vehicle, traffic efficiency and the traffic safety of vehicle.Structural light three-dimensional detection technique is a variety of visions
One of detection method, since this method has, range is big, visual field is big, precision is higher, non-contact, speed is fast and image information
The features such as being easily obtained is widely used in industrial detection, therefore, by using structural light three-dimensional detection technique in the step
To carry out the calculating of the road conditions affecting parameters；
Preferably, in the step, flow of the people is detected by " mobile communication enables processing platform " Lai Shixian.If the mobile phone as user has
Signal, so that it may detect, car owner region then analyzed in the database of signaling processing platform and mobile phone number occurs, then this
A data are re-send on automobile information receiver, so as to obtain flow of the people affecting parameters, vehicle flowrate detection principle is mainly root
Vehicle flowrate parameter is obtained according to speed and the relationship of vehicle flowrate；
Step S20 obtains wind speed information and according to the wind speed information calculation of wind speed affecting parameters, acquisition aerial temperature and humidity information
And temperature and humidity affecting parameters are calculated according to the temperature and humidity information；
Wherein, due to drive a car outside go on a journey when can inevitably encounter it is some blow hard or blow typhoon at the time of, thus can be right
Automobile affects, the accurate premise and key for measuring running resistance and being to ensure that true reflection vehicle actual state, row
Sail drag measurement result is influenced by wind speed environmental factor, therefore, in the step is passed through after calculating the air speed influence parameter
Continue the accuracy of the automobile speed limit method for early warning；
Step S30, according to the road conditions affecting parameters, stream of people's wagon flow affecting parameters, the air speed influence parameter and described
Temperature and humidity affecting parameters calculate early warning speed, and the early warning speed is shown；
Wherein, the step is automatic to calculate by being detected based on road conditions detection, stream of people's vehicle flux monitor, wind speed measurement and environmental parameter
Corresponding early warning speed improves the accuracy of speed limit early warning so as to make safe speed prompt to driver；
Step S40, obtains the current vehicle speed of current vehicle, and judges whether the current vehicle speed is greater than the early warning speed；
Wherein, it can be calculated by the way of comparator between the current vehicle speed and the early warning speed, in terms of improving
Calculate efficiency；
When step S40 determines the current vehicle speed greater than the early warning speed, step S50 is executed；
Step S50 issues prompt alarm；
It is automatic to calculate by being detected based on road conditions detection, stream of people's vehicle flux monitor, wind speed measurement and environmental parameter in the present embodiment
Corresponding early warning speed so as to driver make safe speed prompt, improve the accuracy of speed limit early warning, and prevent by
It is low in comparing speed limit early warning accuracy caused by alarm only with pre-set threshold speed and current vehicle speed
Phenomenon.
Embodiment two
Referring to Fig. 2, be the flow chart for the automobile speed limit method for early warning that second embodiment of the invention provides, comprising steps of
Step S11 obtains the two-dimentional fault image of current road by video camera and laser；
Wherein, using optic triangle method measuring principle, when optical projection device is by the project structured light of certain pattern to body surface,
Structure light will be by profiling object surface, shape modulation, and the 3-D image modulated collects two-dimentional fault image by camera.Often
The structure optical mode such as single-point seen, point range, dot matrix, single straight line, plurality of parallel lines, Dan Yuanhuan, concentric loop, grid, spider
Line etc.；
The two-dimentional fault image is converted to three-D profile image, and calculates road according to the three-D profile image by step S21
Face jolts, track and fracture parameters, to obtain the road conditions affecting parameters；
Wherein, when striation projects on road surface, due to the influence of road surface profile, striation is deformed, and distortion degree depends on
The relative position and profiling object surface of laser and camera, when laser and camera are fixed together by certain space structure
When, the deformation of striation by with the height of road surface facial contour or crack proportion relation.It, can be using sharp using this feature
Light device, video camera and computer composed structure light three-dimensional visual detection system, the two-dimentional fault image obtained by video camera, warp
Cross the three-D profile for calculating and can reappearing highway pavement.Road bump can be obtained by MICROCOMPUTER PROCESSING and program correction again,
Track, the related datas parameter such as crack；
Step S31 obtains the mobile phone signal quantity in region locating for the current vehicle, to obtain stream of people's parameter；
Wherein, the real-time people flow rate statistical process in region is actually in the database of signaling processing platform, according to basic data
The data of table are come a series of analyses carried out, the process of statistics.In the case where the scheduling of database JOB function executes, by independent dispersion
Each process be built into a unified workflow, form the people flow rate statistical module executed automatically；
Step S41, obtains the traffic process being in described in the current vehicle, region average speed and vehicle density, and according to
The traffic process, the region average speed and the vehicle density calculate wagon flow parameter, influence ginseng to obtain stream of people's wagon flow
Number；
Wherein, when speed very greatly close to rubato when, since number of vehicles is less, vehicle flowrate very little, with the reduction of speed,
The increase of vehicle number.Vehicle flowrate is gradually increased, and when speed reaches critical speed, vehicle flowrate reaches maximum value Qm.Later, with
The increase of number of vehicles, speed further decrease, and congestion state is presented in road, and vehicle flowrate reduces therewith, until speed is reduced to
0, no vehicle passes through, vehicle flowrate 0；Preferably, it is desirable that section average speed, need to know in advance surveyed road length, two
Hold the information such as the longitude and latitude at crossing.GIS (GIS-Geographic Information System) is a kind of advanced information processing and management system, can be convenient
Related road information is stored, and by software, GPS be can be convenient in conjunction.It therefore, can be by urban road
The information such as longitude and latitude, length are stored in GIS.In this way, the longitude and latitude shown according to GPS, it may be convenient to know vehicle at this time
Position；
Step S51 obtains the current wind speed of the current vehicle, and calculates running resistance according to the current wind speed, to obtain
The air speed influence parameter；
Wherein, it is referred to as air velocity transducer (and one in air flow sensor for measuring the sensor device of wind speed
Kind), the principle of this sensor is relatively simple, and there are three the measurements of vane to form by band for its structure, and centre has a shaft straight
Then the fuselage of sensor device in succession, so when the air-flow of different dynamics blows to three vanes above, top
Crossbeam also will be with rotation, and the variation of different wind speed will be captured by this sensor, and (a kind of by transmitter
Converter) it is transferred directly to terminal device.Because various industries set the needs of extraneous wind speed, this air flow sensor
It is standby to be also just widely used every field.
Influence of the wind speed to test result
Automobile running resistance can be simplified shown as F=a+bv+cv2, it is assumed that wind is stablized, and automobile positive traveling is against the wind.If wind speed is V
Wind, then
F just=a+b (v+v wind)+c (v+v wind) 2
F is anti-=a+b (v-V wind)+c (v-v wind) 2
F=1/2(F just+F is anti-)=a+bv+c (v2+v wind 2)
Then just aweather caused by running resistance increase, F increase=cv wind 2；
So measurement will have a direct impact on the measured value of final running resistance, the positive bigger running resistance of wind speed under windy condition
Measured value is bigger, and the positive smaller running resistance measured value of wind speed is smaller.C generally between 0.02-0.05, under experimental condition most
Big average forward direction wind speed 3.0m/s is calculated, and increases running resistance by 2.3-5.8N.
Wherein coefficient c is mainly influenced by front face area and air resistance coefficient, and theoretically the increase of the running resistance is one
A definite value does not change with the variation of speed.But in terms of actual tests result, just aweather increase running resistance, in low speed
Smaller, when high speed, is larger.Automobile is primarily due in taxiing procedures by positive, Lateral Wind, makes the whole of automobile
Vehicle attitude angle changes and causes additional running resistance.
Step S61 obtains the Current Temperatures of the current vehicle local environment, and is less than when determining the Current Temperatures
When temperature threshold, determines that road surface has frozen, export pre-warning signal；
Step S71 obtains the current humidity of the current vehicle local environment, and is greater than humidity when determining the current humidity
When threshold value, determines that there is ponding on road surface, export the pre-warning signal；
Wherein, when people drive automobile trip, it is sometimes fine day, sometimes that weather conditions that may be each are all different
Time is the rainy day, is again sometimes icy on road etc..Moreover, external environment also can inevitably change, rains, have suddenly sometimes
When can cool down suddenly.How much this can affect to the traveling of automobile, to increase the probability of traffic accident generation.
In southern rainy day humidity generally in 80%RH or more, even if raining humidity sometimes also less than 70%RH in the north.Under
Humidity when rain outside room is not a definite value, because the moisture field in air is not stop variation, the humidity energy of some places
Reach 95%RH or so, but some places humidity is hovered in 80%RH or so, this depends on the ratio of water vapor partial pressure and saturated vapor pressure.
When environment temperature is lower than zero degree, ground may freeze: when environment temperature is higher than zero degree, ground can be assert without accumulated ice；
Step S81 calculates the number of the pre-warning signal, to obtain the temperature and humidity affecting parameters；
Step S91, according to the road conditions affecting parameters, stream of people's wagon flow affecting parameters, the air speed influence parameter and described
Temperature and humidity affecting parameters calculate early warning speed, and the early warning speed is shown；
Step S101, obtains the current vehicle speed of current vehicle, and judges whether the current vehicle speed is greater than the early warning speed；
When step S101 determines the current vehicle speed greater than the early warning speed, step S111 is executed；
Step S111 issues prompt alarm；
Wherein, the step of sending prompt alarm includes:
The instrument board for controlling the current vehicle is persistently flashed according to prefixed time interval, and is controlled loudspeaker and carried out voice
Prompt alarm；
When step S101, which determines the current vehicle speed, is not greater than the early warning speed, step S121 is executed；
Step S121, the speed difference between calculating speed threshold value and the current vehicle speed；
Step S131 controls the engine oil-break of the current vehicle when determining the speed difference less than difference threshold；
It is automatic to calculate by being detected based on road conditions detection, stream of people's vehicle flux monitor, wind speed measurement and environmental parameter in the present embodiment
Corresponding early warning speed so as to driver make safe speed prompt, improve the accuracy of speed limit early warning, and prevent by
It is low in comparing speed limit early warning accuracy caused by alarm only with pre-set threshold speed and current vehicle speed
Phenomenon.
Embodiment three
Referring to Fig. 3, being the structural schematic diagram for the automobile speed limit early warning system 100 that third embodiment of the invention provides, comprising: road
Condition parameter calculating module 10, stream of people's wagon flow parameter calculating module 11, wind speed parameter computing module 12, temperature and humidity parameter calculating module
13, early warning speed calculation module 14 and prompt alarm module 15, in which:
Road conditions parameter calculating module 10, for obtaining traffic information and calculating road conditions affecting parameters according to the traffic information.
Preferably, the road conditions parameter calculating module 10 is also used to: obtaining current road by video camera and laser
Two-dimentional fault image；The two-dimentional fault image is converted into three-D profile image, and is calculated according to the three-D profile image
Road bump, track and fracture parameters, to obtain the road conditions affecting parameters.
Stream of people's wagon flow parameter calculating module 11, for obtaining stream of people's car flow information and being calculated according to stream of people's car flow information
Stream of people's wagon flow affecting parameters.
Preferably, stream of people's wagon flow parameter calculating module also 11 is used for: obtaining the hand in region locating for the current vehicle
Machine number of signals, to obtain stream of people's parameter；Obtain the traffic process being in described in the current vehicle, region average speed and vehicle
Current density, and wagon flow parameter is calculated according to the traffic process, the region average speed and the vehicle density.
Wind speed parameter computing module 12, for obtaining wind speed information and influencing to join according to the wind speed information calculation of wind speed
Number.
Further, the wind speed parameter computing module 12 is also used to obtain the current wind speed of the current vehicle, and root
Running resistance is calculated according to the current wind speed, to obtain the air speed influence parameter.
Temperature and humidity parameter calculating module 13, for obtaining aerial temperature and humidity information and calculating temperature according to the temperature and humidity information
Humidity affecting parameters.
In addition, the temperature and humidity parameter calculating module 13 is also used to: obtaining the current temperature of the current vehicle local environment
Degree, and when determining the Current Temperatures less than temperature threshold, determine that road surface has frozen, exports pre-warning signal；Described in acquisition
The current humidity of current vehicle local environment, and when determining the current humidity greater than humidity threshold, determine that there is product on road surface
Water exports the pre-warning signal；The number of the pre-warning signal is calculated, to obtain the temperature and humidity affecting parameters.
Early warning speed calculation module 14, for according to road conditions affecting parameters, stream of people's wagon flow affecting parameters, described
Air speed influence parameter and the temperature and humidity affecting parameters calculate early warning speed, and the early warning speed is shown.
Alarm module 15 is prompted, for obtaining the current vehicle speed of current vehicle, and judges whether the current vehicle speed is greater than
The early warning speed；When determining the current vehicle speed greater than the early warning speed, prompt alarm is issued.
In the present embodiment, the prompt alarm module 15 is also used to: controlling the instrument board of the current vehicle according to default
Time interval is persistently flashed, and is controlled loudspeaker and carried out voice prompt alarm.
Preferably, the automobile speed limit early warning system 100 further include:
Oil-feeding control module 16, for when determining the current vehicle speed and not being greater than the early warning speed, calculating speed threshold value
With the speed difference between the current vehicle speed；When determining the speed difference less than difference threshold, control described current
The engine oil-break of vehicle.
In the present embodiment, by being detected based on road conditions detection, stream of people's vehicle flux monitor, wind speed measurement and environmental parameter, automatically
Corresponding early warning speed is calculated, so as to make safe speed prompt to driver, improves the accuracy of speed limit early warning, and prevent
Since the speed limit early warning accuracy caused by comparing alarm with current vehicle speed only with pre-set threshold speed is low
Under phenomenon.
The present embodiment also provides a kind of automobile speed limit prior-warning device, including storage equipment and processor, the storage are set
It is ready for use on storage computer program, the processor runs the computer program so that automobile speed limit early warning dress executes
The automobile speed limit method for early warning stated.
The present embodiment additionally provides a kind of storage medium, is stored thereon with meter used in above-mentioned automobile speed limit early warning dress
Calculation machine program, the program when being executed, include the following steps:
It obtains traffic information and road conditions affecting parameters is calculated according to the traffic information, obtain stream of people's car flow information and according to described
Stream of people's car flow information calculates stream of people's wagon flow affecting parameters；
Obtain wind speed information and according to the wind speed information calculation of wind speed affecting parameters, acquisition aerial temperature and humidity information and according to institute
It states temperature and humidity information and calculates temperature and humidity affecting parameters；
According to the road conditions affecting parameters, stream of people's wagon flow affecting parameters, the air speed influence parameter and the temperature and humidity shadow
It rings parameter and calculates early warning speed, and the early warning speed is shown；
The current vehicle speed of current vehicle is obtained, and judges whether the current vehicle speed is greater than the early warning speed；
When determining the current vehicle speed greater than the early warning speed, prompt alarm is issued.The storage medium, such as:
ROM/RAM, magnetic disk, CD etc..
It is apparent to those skilled in the art that for convenience and simplicity of description, only with above-mentioned each function
The division progress of unit, module can according to need and for example, in practical application by above-mentioned function distribution by different function
Energy unit or module are completed, i.e., the internal structure of storage device is divided into different functional unit or module, more than completing
The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit,
It can be each unit to physically exist alone, can also be integrated in one unit with two or more units, it is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.In addition, each function list
Member, the specific name of module are also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of automobile speed limit method for early warning, which is characterized in that the described method includes:
It obtains traffic information and road conditions affecting parameters is calculated according to the traffic information, obtain stream of people's car flow information and according to described
Stream of people's car flow information calculates stream of people's wagon flow affecting parameters；
Obtain wind speed information and according to the wind speed information calculation of wind speed affecting parameters, acquisition aerial temperature and humidity information and according to institute
It states temperature and humidity information and calculates temperature and humidity affecting parameters；
According to the road conditions affecting parameters, stream of people's wagon flow affecting parameters, the air speed influence parameter and the temperature and humidity shadow
It rings parameter and calculates early warning speed, and the early warning speed is shown；
The current vehicle speed of current vehicle is obtained, and judges whether the current vehicle speed is greater than the early warning speed；
When determining the current vehicle speed greater than the early warning speed, prompt alarm is issued.
2. automobile speed limit method for early warning according to claim 1, which is characterized in that described whether to judge the current vehicle speed
After the step of greater than the early warning speed, the method also includes:
When determining the current vehicle speed and not being greater than the early warning speed, between calculating speed threshold value and the current vehicle speed
Speed difference；
When determining the speed difference less than difference threshold, the engine oil-break of the current vehicle is controlled.
3. automobile speed limit method for early warning according to claim 1, which is characterized in that the acquisition traffic information and according to institute
Stating the step of traffic information calculates road conditions affecting parameters includes:
The two-dimentional fault image of current road is obtained by video camera and laser；
The two-dimentional fault image is converted into three-D profile image, and according to the three-D profile image calculate road bump,
Track and fracture parameters, to obtain the road conditions affecting parameters.
4. automobile speed limit method for early warning according to claim 1, which is characterized in that the acquisition stream of people car flow information and root
Include: according to the step of stream of people's car flow information calculating stream of people's wagon flow affecting parameters
The mobile phone signal quantity in region locating for the current vehicle is obtained, to obtain stream of people's parameter；
The traffic process being in described in the current vehicle, region average speed and vehicle density are obtained, and according to the traffic
Process, the region average speed and the vehicle density calculate wagon flow parameter.
5. automobile speed limit method for early warning according to claim 1, which is characterized in that the acquisition wind speed information and according to institute
The step of stating wind speed information calculation of wind speed affecting parameters include:
The current wind speed of the current vehicle is obtained, and running resistance is calculated according to the current wind speed, to obtain the wind speed
Affecting parameters.
6. automobile speed limit method for early warning according to claim 1, which is characterized in that the acquisition aerial temperature and humidity information is simultaneously
Include: according to the step of temperature and humidity information calculating temperature and humidity affecting parameters
The Current Temperatures of the current vehicle local environment are obtained, and when determining the Current Temperatures less than temperature threshold,
Determine that road surface has frozen, exports pre-warning signal；
The current humidity of the current vehicle local environment is obtained, and when determining the current humidity greater than humidity threshold,
Determine that there is ponding on road surface, exports the pre-warning signal；
The number of the pre-warning signal is calculated, to obtain the temperature and humidity affecting parameters.
7. automobile speed limit method for early warning according to claim 1, which is characterized in that the step of sending prompt is alarmed is wrapped
It includes:
The instrument board for controlling the current vehicle is persistently flashed according to prefixed time interval, and is controlled loudspeaker and carried out voice
Prompt alarm.
8. a kind of automobile speed limit early warning system, which is characterized in that the system comprises:
Road conditions parameter calculating module, for obtaining traffic information and calculating road conditions affecting parameters according to the traffic information；
Stream of people's wagon flow parameter calculating module, for obtaining stream of people's car flow information and calculating stream of people's vehicle according to stream of people's car flow information
Flow affecting parameters；
Wind speed parameter computing module, for obtaining wind speed information and according to the wind speed information calculation of wind speed affecting parameters；
Temperature and humidity parameter calculating module, for obtaining aerial temperature and humidity information and calculating temperature and humidity shadow according to the temperature and humidity information
Ring parameter；
Early warning speed calculation module, for according to the road conditions affecting parameters, stream of people's wagon flow affecting parameters, the wind speed shadow
It rings parameter and the temperature and humidity affecting parameters calculates early warning speed, and the early warning speed is shown；
Alarm module is prompted, for obtaining the current vehicle speed of current vehicle, and it is described pre- to judge whether the current vehicle speed is greater than
Alert speed；When determining the current vehicle speed greater than the early warning speed, prompt alarm is issued.
9. automobile speed limit early warning system according to claim 8, which is characterized in that the automobile speed limit early warning system is also wrapped
It includes:
Oil-feeding control module, for when determining the current vehicle speed and not being greater than the early warning speed, calculating speed threshold value with
Speed difference between the current vehicle speed；When determining the speed difference less than difference threshold, control is described to work as front truck
Engine oil-break.
10. automobile speed limit early warning system according to claim 8, which is characterized in that the road conditions parameter calculating module is also
For:
The two-dimentional fault image of current road is obtained by video camera and laser；
The two-dimentional fault image is converted into three-D profile image, and according to the three-D profile image calculate road bump,
Track and fracture parameters, to obtain the road conditions affecting parameters.
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