CN102842240A - Early warning system for safety traffic of vehicle in fog region and safety traffic guidance method based on early warning system - Google Patents
Early warning system for safety traffic of vehicle in fog region and safety traffic guidance method based on early warning system Download PDFInfo
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Abstract
The invention provides an early warning system for safety traffic of a vehicle in a fog region. The system comprises an early warning control center and a plurality of traffic guidance units which are uniformly spaced and arranged along a road; the road with the uniformly arranged traffic guidance units forms a guidance zone of the fog region, and taking self as an origin of coordinate, the traffic guidance unit is communicated with each traffic guidance unit within the safety traffic distance opposite to the forward direction of the road through a communication module. With the adoption of the early warning system for the safety traffic of the vehicle in the fog region and a safety traffic guidance method based on the early warning system, the safety guidance for the traffic of the vehicle on the road, especially the highway, in the fog region can be realized, the potential safety hazard for the traffic of the vehicle in a low visibility can be effectively reduced, the road, especially the highway can keep normal operation in the fog weather in which the visibility is not less than 50 m, full play can be maximally given to the operation capability of the highway and safe and efficient development of a traffic system of the road, especially the highway are facilitated, and the system and the method can be used in an unmanned manner.
Description
Technical field
Application of the present invention relates to the safety traffic early warning system and the early warning induction method of road, especially highway, particularly be the early warning system and the early warning induction method of fog-zone road, especially expressway fog zone traffic safety.
Background technology
For fear of greasy weather road, the especially generation of freeway traffic interruption of service, the countermeasure of greasy weather road security of operation mainly contains at present: the one, according to weather forecast closing high-speed highway, time-out traffic; The 2nd, set up meteorological measuring station, directly issue dense fog information and speed limit early warning information by large screen display device, be aided with the staff again and set out on a journey and dredge; Three are based on driver's DAS (Driver Assistant System) of technological means such as infrared, radar or GPS etc.
The problem that above method exists is conspicuous.Though first kind of blocked road method stopped the generation of fogday traffic accident; But it is to be cost with the traffic capacity that completely loses road, especially highway; And generally be to make a strategic decision in the road closure that making after back one period time delay appears in dense fog; The vehicle that has got into the fog-zone road still will face the circumstances that do not have effective and safe to ensure counter-measure, still will face high potential safety hazard.Second kind, though dense fog information issue prompt system can play certain reminding effect, when running into the not strong driver of awareness of safety, or situation, visibility sudden change such as the prominent group of suffering mist and when producing the sight line tomography, trackside very easily occurs going out or rear-end collision takes place.The third need be reequiped vehicle based on driver's DAS (Driver Assistant System) of technological means such as infrared, radar or GPS, and have only all vehicles that this system all is installed could real its effectiveness of performance, in practical application, be difficult to popularize.
Part provinces and cities highways such as the Xinjiang of China, Fujian; Adopt the highway section, fog-zone that active illuminating profile mark is installed; But it can only be strengthened road profile or point out restricting signal with the traffic lights flashing mode; Do not have fog-zone anticollision warning function, more can't solve because of a mist etc. and cause the visibility sudden change, the problems such as vehicle rear-end collision accident that the sight line tomography causes occur.
Summary of the invention
The goal of the invention of patented claim of the present invention provides and a kind ofly can be voluntarily initiatively instructs strategy, both made and also guarantee fog-zone vehicle safe driving early warning system that vehicle safety passes through in the highway section, fog-zone of low visibility and based on the safety traffic abductive approach of this system for driving vehicle provides safety traffic.
The fog-zone vehicle safe driving early warning system technical scheme that patented claim of the present invention provides; Its major technique content is: a kind of fog-zone vehicle safe driving early warning system; Comprise early warning control center and the proportional spacing some traffic guidances unit by road arranged along the line, the road of evenly distributed layout traffic guidance unit constitutes the fog-zone and induces band; Early warning control center is to be central controller with the microprocessor; Include the transmittance meter that is communicated with microprocessor by the signals collecting bus; Include communication unit and information release unit that the channel bus by correspondence is communicated with microprocessor; Described information release unit comprises information issue screen and speed limit display screen, and described communication unit comprises the communication module with information issue screen, speed limit display screen and traffic guidance unit communication; The traffic guidance unit all is central controller with the microprocessor; Include the vehicle checker that is communicated with the signals collecting bus of this microprocessor; Include the reddish yellow bi-colour light that is communicated with the microprocessor output bus; Include the communication module that is communicated with the channel bus of microprocessor, each traffic guidance unit, is communicated with each traffic guidance unit communication within the road driving safety traffic distance in the opposite direction with from as true origin through communication module.
The safety traffic abductive approach that patented claim of the present invention provides based on above-mentioned fog-zone vehicle safe driving early warning system; This safety traffic abductive approach comprises: the visibility measured value that early warning control center obtains according to collection; The one, which early warning range whether the visibility measured value that judgement obtains falls into early warning range and fall into setting; And release news and speed-limiting messages is sent to information issue screen and speed limit display screen by communication unit according to the corresponding information of the early warning range that falls into; Issue display reminding information; The 2nd, transmit control signal to each traffic guidance unit by communication unit, be the early warning show state by each traffic guidance unit according to the enabling signal startup bi-colour light that the visibility value falls into early warning range, described early warning show state is a bi-colour light amber light low frequency stroboscopic state; When the vehicle checker of a traffic guidance unit detects vehicle and appears at the fog-zone and induce in the band; This this bi-colour light of traffic guidance unit starting is that alert status shows, described alert status is the bright and red light stroboscopic frequency values increase of bi-colour light red light, is true origin with this traffic guidance unit simultaneously; To with its road driving safety traffic in the opposite direction distance within each traffic guidance unit send alarm signal; Each traffic guidance unit within the safety traffic distance receives and starts self bi-colour light and is the caution show state, and in the vehicle ', the traffic guidance unit that moment runs off the safety traffic distance is the early warning show state.
Based on the safety traffic abductive approach technical scheme to state, when the car of many front and back of appearance, back car is higher than front truck to the triggering control hierarchy of the traffic guidance unit in the rear safety traffic spacing.
The disclosed fog-zone of patented claim of the present invention vehicle safe driving early warning system and based on the safety traffic abductive approach of this system; Realized to fog-zone road, especially express-road vehicle running safe guidance, effectively reduction can be seen the vehicle driving safety hidden danger when low; Through the red caution of the high early warning of the dynamic following tail band that behind vehicle, forms; Force back car driver to adjust the spacing with front truck voluntarily; Vehicle is gone in the amber light securing band, remain on the determined dynamic security operating range of amber light scope with front truck, the present technique scheme is not with rigid speed limit mode; But make the subjective control of the driver speed of a motor vehicle; And can the real-time prompting driver remain the safety traffic distance between car and the car, thereby the psychological pressure of driver's greasy weather road driving and the degree of fatigue of generation thereof have been effectively reduced, the contingent second accident that once reaches of more effective strick precaution.The advantage that the present technique scheme also has is: the technology that the present technique scheme has been avoided the vehicle add-assembly realizes means; Only on road, especially highway, install and be provided with; Carry out analysis, judgement and the sequencing control of alert status or alert status with vehicle dynamic movement locus and visibility measured value; Have that calculated amount is little, hardware form simple, be easy to realize, portable strong advantage; Practice shows: the present technique scheme is very effective for reducing the traffic accidents that foggy weather causes, and is not less than in visibility under 50 meters the foggy weather, still can make road, especially highway keep normal operation; Give full play to highway operation ability to greatest extent; Realized the technical change that the expressway fog zone operational vehicle is controlled to security coordination by discretionary security control, promoted road, especially freeway traffic security of system, high efficiency development, and it has been on duty to need not personnel.
Description of drawings
Fig. 1 is the composition frame chart of this fog-zone vehicle safe driving early warning system
Fig. 2 is the arrangement synoptic diagram of native system at road, and it is bright that the black circle among the figure is expressed as red light, and it is bright that white circle is expressed as amber light,
Car was less than the safety traffic spacing with just for inducing the band working state figure in the fog-zone of safety traffic spacing before and after Fig. 3 and Fig. 4 were respectively
Fig. 5 induces the band working state figure for the fog-zone of front and back following distance during greater than the safety traffic spacing
The band working state figure is induced in fog-zone when Fig. 6 goes for the front and back car in the same way.
Embodiment
As shown in Figure 1; The fog-zone vehicle safe driving early warning system that patented claim of the present invention provides; Its system forms and comprises early warning control center 200 and the some traffic guidances unit 400 of proportional spacing with road arranged in arrays along the line; Each traffic guidance unit 400 press the continuous arranged of proportional spacing road, especially highway along the line on; Thereby the formation fog-zone is induced and is with 700 on road, especially highway, and present technique design for scheme purpose is based on the bus or train route collaboration working method and makes vehicle safety traffic in band is induced in the fog-zone under the omnidistance initiatively early warning induction of this early warning system.
Mainly be by each early warning control center 200 control ability scope; The fog-zone induced extend mileage with 700 road, the especially highways that are covered and be divided into plurality of sections, each early warning control center 200 gets in touch with each traffic guidance unit 400 wired or wireless communication in its range of control section.In actual installation; Each traffic guidance unit 400 in the native system can be arranged on one-way road, especially highway guardrails of both sides place along the line; Or be arranged on road, especially highway central partition along the line; Or be arranged on road, especially highway other installation site along the line, and its array pitch can be set at tens meters, and present embodiment is the example some traffic guidances of arranged unit 400 on road, especially highway are along the line with 25 meters spacings.
Described early warning control center 200 is to be central controller with the microprocessor; For example select the ARM7 of the LPC2292 that has RJ45 interface, two RS232 interface and SPI interface structure for use; Also include the transmittance meter 100 that is communicated with microprocessor by the signals collecting bus; Be that transmittance meter 100 is connected with the signals collecting bus of microprocessor by the RS232 interface; Transmittance meter 100 can be selected visiometer, can also be used as the video transmittance meter by the road monitoring video camera, and mist condition rank is monitored in real time; Early warning control center 200 also includes respectively the communication unit 300 and information release unit 500 that is communicated with microprocessor by channel bus separately; Described information release unit 500 includes information issue screen 501 and speed limit display screen 502, and both are arranged on road, especially highway above the fold, and communication unit 300 is preferably issued the wireless communication module of screen 501, speed limit display screen 502 and traffic guidance unit communication with information; The channel bus of microprocessor connects optical fiber or GPRS wireless mobile communications module 302 by RJ45 interface or RS232 interface; To issue signal wireless through wireless mobile public network network and be sent to information release unit 500, on information issue screen 501, show caveat or fog degree, on speed limit display screen 502, show speed limit; Also can realize the data communication of each early warning control center 200 and Surveillance center 600 through wireless mobile public network network, realize the overhead control of data sink summation; The SPI interface of microprocessor is connected with the wireless communication module 301 of getting in touch with the traffic guidance unit wireless; This wireless communication module 301 can be selected 433MHz high-power wireless communication module for use, and microprocessor sends control signals such as reddish yellow bi-colour light startup through the wireless communication module 301 that the SPI interface connects to traffic guidance unit 400.Certainly also can wired mode realize the signal transmission between microprocessor and information release unit 500, microprocessor and each traffic guidance unit 400 of being administered; But considering from aspects such as actual arrangement scale, input cost and final-period managements, is preferential with the communication still usually.
Described traffic guidance unit 400 can be supplied power by the solar powered control module 404 that solar charger constitutes; Its actual antenna height is located at 1.2 meters; Can be set at about 25 meters to laying spacing along road, especially highway clump; Is example at present embodiment with 25 meters spacings, and each early warning control center 200 manageable range of control mileage is an example with 5 kilometers fog-zone sections of inducing.
Based on the fog-zone vehicle safe driving abductive approach that above-mentioned fog-zone vehicle safe driving early warning system realizes, this method is:
With the explanation of actual set scheme example as follows:
(1), when low visibility in 500 meters, during greater than 300 meters; Early warning control center 200 shows speed limit V through optical fiber/GPRS wireless mobile communications module 302 on issue " Forward Visbility is lower than 500 meters, please drive with caution " on the information issue screen 501, speed limit display screen 502
LimitThe information in " 100 " kilometer/time;
(2), when low visibility in 300 meters, during greater than 100 meters; Early warning control center 200 shows speed limit V through optical fiber/GPRS wireless mobile communications module 302 on issue " the place ahead dense fog please be followed yellow induced light and gone " on the information issue screen 501, speed limit display screen 502
LimitThe information in " 80 " kilometer/time;
(3), when low visibility during in 100m; Early warning control center 200 is through the issue " the place ahead thick fog; please follow yellow induced light and go " on information issue screen 501 of optical fiber/GPRS wireless mobile communications module 302, and visibility shows speed limit V during greater than 50 meters on the speed limit display screen 502
LimitThe information in " 60 " kilometer/time when low visibility during in 50 meters, shows speed limit V on the speed limit display screen 502
Limit" 40 " kilometer/time information;
Early warning control center 200 is when judging that the visibility value that obtains is lower than 300 meters; Transmit control signal to each traffic guidance unit 400 by its wired mode or wireless communication module 301; Starting bi-colour light by each traffic guidance unit 400 is the early warning show state; Described early warning show state is a bi-colour light amber light low frequency stroboscopic state, as is set at amber light 2Hz flicker frequency.
When getting into the fog-zone, vehicle induces band; When promptly detecting this vehicle and appear at the fog-zone and induce in the band by the vehicle checker 401 of a traffic guidance unit 400; The reddish yellow bi-colour light of this i.e. startup in traffic guidance unit 400 itself is that alert status shows; Described alert status is the bright and red light stroboscopic frequency values increase of reddish yellow bi-colour light red light, as is red light 3Hz flicker frequency, is true origin with the traffic guidance unit that detects this driving vehicle simultaneously; By its wireless communication module 403 to the reverse safety traffic of this vehicle heading distance within each traffic guidance unit send alarm signal; If the safety traffic that sets distance is 100 meters, then transmit control signal to three traffic guidance unit 400 at the vehicle heading rear of the traffic guidance unit that detects vehicle, make wireless communication module 403 in three traffic guidance unit 400 within the safety traffic distance receive this transmission signal after; The reddish yellow bi-colour light that starts self is that alert status shows; Promptly behind vehicle, form the red warning tape of high early warning, run off the traffic guidance unit of former safety traffic spacing range thereafter with vehicle ' moment, then control voluntarily; Change former high stroboscopic red colored lamp into low stroboscopic amber light, the red warning tape of promptly described high early warning is the vehicle that dynamic following monitors.
To combine Fig. 3, Fig. 4, Fig. 5 and Fig. 6 to describe below, it is bright that black circle wherein is expressed as red colored lamp, and it is bright that white circle is expressed as amber light.
1., A, B two car actual travel spacings be during greater than minimum safe spacing 100m, like Fig. 4 and shown in Figure 5, a front truck A place or a nearest traffic guidance unit 400 that is surpassed are regarded as true origin; Its rear portion; Be the tailstock form follow front truck A redness caution district, as front truck A is through traffic guidance unit, n place constantly to establish T0, then all to start to the reddish yellow bi-colour light of thereafter traffic guidance unit, n-4 place 400 be red and the 3Hz flicker frequency is warned demonstration to n; Back car B is through after the traffic guidance unit, n-5 place; Still be yellow and 2Hz flicker frequency, then back car B and the front truck A maintenance spacing of going is that 100m goes, and is illustrated in fig. 4 shown below.
When front truck A goes arrival traffic guidance unit, n+3 place; Its red caution district follows from new combination; It is high stroboscopic red colored lamp that the reddish yellow bi-colour light that promptly becomes traffic guidance unit, n+2 to n-1 place by traffic guidance unit, thereafter n to n-4 place starts; Form this redness caution district constantly, when n-2 traffic guidance unit runs off former safety traffic spacing range in moment, control by self microprocessor control signal; Change former high stroboscopic red colored lamp into low stroboscopic amber light, as shown in Figure 5.
2., go spacing during as front and back two car A, B less than minimum safe spacing 100m:
If back car B rapid speed, when making the spacing of going of itself and front truck A reach, promptly get into the dynamic red warning tape of front truck A less than 100 meters of minimum safe spacings; In this case, front and back two car A, B redness caution district separately combines, and is as shown in Figure 6; Pass through traffic guidance unit, n+2 place like T0 moment front truck A; Thereafter traffic guidance unit, n+2 to n-1 place is the dynamic redness caution district of its formation, and when passing through traffic guidance unit, n-1 place as if back car B, traffic guidance unit, n-2 to n-5 place has thereafter also formed its red district that warns; Two red caution districts are connected, and form a longer redness caution district; When back car B passes through traffic guidance unit, n place; To preferentially reset to the reddish yellow bi-colour light state of thereafter traffic guidance unit, n-1 to the n-4 place, i.e. the traffic guidance unit that passes through of back car B and the triggering control hierarchy of the traffic guidance unit in the rear safety traffic spacing is higher than front truck A.
When back car B goes in the red warning tape of front truck A for a long time; Back B car driver has constriction; Will adjust the reduction speed of a motor vehicle voluntarily; Strengthen gradually and front truck A spacing, reach minimum safe spacing 100m when above until two car A, the B spacing of going, promptly back car B goes dynamically inducing in the band of yellow induced light.
The protection of present technique scheme is not limited to by above-described specific embodiment, does not especially receive the restriction of listed integrated chip model.
Claims (6)
1. fog-zone vehicle safe driving early warning system; It is characterized in that this system comprises that early warning control center (200) and proportional spacing press some traffic guidances unit (400) of road arranged along the line, the road of evenly distributed layout traffic guidance unit constitutes the fog-zone and induces band (700); Early warning control center (200) is to be central controller with the microprocessor; Include the transmittance meter (100) that is communicated with microprocessor by the signals collecting bus; Include communication unit (300) and information release unit (500) that the channel bus by correspondence is communicated with microprocessor; Described information release unit (500) comprises information issue screen (501) and speed limit display screen (502), and described communication unit (300) comprises the communication module with information issue screen, speed limit display screen and traffic guidance unit communication; Traffic guidance unit (400) all is central controller with the microprocessor; Include the vehicle checker (401) that is communicated with the signals collecting bus of this microprocessor; Include the reddish yellow bi-colour light (402) that is communicated with the microprocessor output bus; Include the communication module that is communicated with the channel bus of microprocessor, each traffic guidance unit (400), is communicated with each traffic guidance unit communication within the road driving safety traffic distance in the opposite direction with from as true origin through communication module.
2. fog-zone according to claim 1 vehicle safe driving early warning system; It is characterized in that the communication module (300) in the early warning control center (200) includes wireless mobile communications module (302) and wireless communication module (301), the communication module of traffic guidance unit (400) is the wireless communication module (403) of getting in touch with wireless communication module (301) radio communication of early warning control center (200).
3. fog-zone according to claim 2 vehicle safe driving early warning system; It is characterized in that each traffic guidance unit with from as true origin, gets in touch through wireless communication module (403) radio communication with each the traffic guidance unit within the road driving safety traffic distance in the opposite direction.
4. fog-zone according to claim 1 vehicle safe driving early warning system; It is characterized in that each traffic guidance unit with from as true origin, gets in touch through CAN networking bus radio communication with each the traffic guidance unit within the road driving safety traffic distance in the opposite direction.
5. based on the safety traffic abductive approach of claim 1,2,3 or 4 described fog-zone vehicle safe driving early warning systems; It is characterized in that this safety traffic abductive approach comprises: the visibility measured value that early warning control center obtains according to collection; The one, which early warning range whether the visibility measured value that judgement obtains falls into early warning range and fall into setting; And release news and speed-limiting messages is sent to information issue screen and speed limit display screen by communication unit according to the corresponding information of the early warning range that falls into; Issue display reminding information; The 2nd, transmit control signal to each traffic guidance unit by communication unit, be the early warning show state by each traffic guidance unit according to the enabling signal startup bi-colour light that the visibility value falls into early warning range, described early warning show state is a bi-colour light amber light low frequency stroboscopic state; When the vehicle checker of a traffic guidance unit detects vehicle and appears at the fog-zone and induce in the band; This this bi-colour light of traffic guidance unit starting is that alert status shows, described alert status is the bright and red light stroboscopic frequency values increase of bi-colour light red light, is true origin with this traffic guidance unit simultaneously; To with its road driving safety traffic in the opposite direction distance within each traffic guidance unit send alarm signal; Each traffic guidance unit within the safety traffic distance receives and starts self bi-colour light and is the caution show state, and in the vehicle ', the traffic guidance unit that moment runs off the safety traffic distance is the early warning show state.
6. fog-zone according to claim 5 vehicle safe driving abductive approach, before and after it is characterized in that occurring during many cars, the traffic guidance unit that back car passes through and the triggering control hierarchy of the traffic guidance unit in the rear safety traffic spacing is higher than front truck.
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