CN103150772A - Multi-lane free flow electronic toll collection system arranged on side of road - Google Patents
Multi-lane free flow electronic toll collection system arranged on side of road Download PDFInfo
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Abstract
The invention relates to the field of an intelligent transportation system, in particular to a multi-lane free flow electronic toll collection system arranged on the side of a road. The multi-lane free flow electronic toll collection system comprises at least two phased array multilane free flow antennas arranged on the two sides of the road and used for measuring a vehicle electronic tag on a vehicle as well as angle information between the two phased array multilane free flow antennas respectively and transmitting the angle information as well as first time information during the measurement to a lane controller; and the lane controller is used for calculating according to the angle information between the two phased array multilane free flow antennas as well as self position information to obtain first position information of the vehicle, saving the first position information and the first time information of the vehicle and carrying out toll collection according to the first position information and the vehicle electronic tag of the vehicle. Through the system provided by the embodiment of the invention, the technical difficult problem that a transverse portal frame is erected above the wide road can be solved, so that the erection cost of the multi-lane free flow system is reduced.
Description
Technical field
(Intelligent Transport System, be called for short: ITS) field particularly, the present invention relates to the multilane Free-flow E-payment system that a kind of trackside arranges to the present invention relates to intelligent transportation system.
Background technology
Along with the highway mileage open to traffic constantly increases, the continuous progress of toll collection technique, a lot of provinces and cities of China have all built highway electric non-stop toll (Electronic Toll Collection, be called for short ETC) system.Existing highway electric Fare Collection System employing bicycle road pattern, the vehicle that vehicle carried electronic label is installed need to enter the track of appointment, and (highway ETC track speed limit is as 20km/h at present) passes through the ETC track take low speed; For the illegal vehicle that enters the ETC track, the track railing is tackled automatically, is processed by manual intervention.
the ETC system is that the mode by radio communication realizes the charging transaction by ETC antenna and vehicle carried electronic label, communication protocol adopts Dedicated Short Range Communications, (Dedicated Short Range Communication, be called for short DSRC) agreement, its processing procedure is: ETC antenna (RoadSide Unit, be called for short RSU) the descending BST of periodic transmission (Beacon ServiceTable, the beacon service table) signal, vehicle carried electronic label (or board units is installed, OnBoard Unit, when vehicle abbreviation OBU) sails the ETC area of charge into, receive the BST signal, return to VST (Vehicle Service Table, the vehicle service table) signal.MAC (Media Access Control, the media interviews control) address, sequence number and other information that include vehicle carried electronic label in the VST signal, wherein the MAC Address of vehicle carried electronic label is the main identification code of itself and antenna communication.After antenna is received up DSRC Frame, distinguish different vehicle carried electronic labels with its MAC Address; Antenna is issued the downlink data frame of different vehicle carried electronic labels, all the proprietary link identification take the MAC Address of target vehicle carried electronic label as downlink frame.Vehicle carried electronic label receives only the proprietary link identification downlink data frame identical with the MAC Address of oneself.After antenna is received the VST signal, at first be encrypted authentication with vehicle carried electronic label, the purpose of authentication is to distinguish whether vehicle has installed the vehicle carried electronic label of legal registration, authentication by after carry out ETC charge transaction.After the ETC transaction communications finished, then the antenna transmission END instruction continued the periodic descending BST signal of emission, waits for sailing into of follow-up vehicle.Existing ETC antenna has the structure of transceiver, and the structure of emitting antenna and receiving antenna split is also arranged, but antenna does not possess the vehicle location function.Although the relatively traditional manual toll collection of E-payment system of bicycle road pattern has very large technical progress, improved lane capacity, reduced the service time of paying dues, played the effect of energy-saving and emission-reduction, civil engineering costs is higher, the speed that is open to traffic is relatively low, illegal vehicle needs the inconvenience such as on-the-spot artificial treatment but still exist.In order to adapt to highway and urban road barrier free accessibility and charge, a kind of multilane Free-flow electronic toll system that is called as is suggested.
The patent of invention of Chinese patent publication No. CN102622784A, denomination of invention is " utilizing the quadrature phased array antenna to realize the method for multilane Free-flow electronic charging ", wherein the electronic charging of multilane Free-flow refers to there is no the track isolation facility at toll station, toll facility is erected on the portal frame of top, track, complete the charge transaction with the vehicle carried electronic label that the vehicle that misses the stop is installed by the mode of radio communication, vehicle can be according to the normal speed of a motor vehicle (0-120km/h), (comprise by track, standdle carrier road and become the track) in any way and passing through toll station.Used portal frame in this technical scheme, namely toll facility all is arranged on portal frame across road, and the laying difficulty of portal frame is larger for tunnel or wider road, need complete blocked road during construction, and expense cost is higher.
Summary of the invention
In prior art ETC Fare Collection System, the special highway section of part does not possess the conditioned disjunction possibility that portal frame is set in order to solve, the multilane Free-flow E-payment system that a kind of trackside arranges has been proposed, set up charge equipment in road both sides, can complete with lower construction cost and lower difficulty of construction the laying of Free-flow Fare Collection System like this.
The multilane Free-flow E-payment system that the embodiment of the present invention provides a kind of trackside to arrange comprises,
At least two phased array multilane Free-flow antennas, driveway controller;
Described at least two phased array multilane Free-flow antennas are installed relatively in road both sides, and the antenna radiator normal becomes fixed angle with vehicle heading, and described phased array multilane Free-flow antenna is connected with described driveway controller;
Described at least two phased array multilane Free-flow antennas are the vehicle carried electronic label and the relative angle information of this phased array multilane Free-flow antenna on measuring vehicle respectively in the both sides of described road, and the very first time information when measuring sends described driveway controller to this angle information;
Described driveway controller calculates the primary importance information of described vehicle at least according to the angle information of two phased array multilane Free-flows antenna measurement, primary importance information and the very first time information of described vehicle are preserved, and carry out billing operation according to the vehicle carried electronic label of described primary importance information and described vehicle.
A further aspect of the multilane Free-flow E-payment system that a kind of trackside according to the embodiment of the present invention arranges, described phased array multilane Free-flow antenna setting height(from bottom) is at the above 5-6 rice of described pavement of road, for unidirectional track, the line of a pair of phased array multilane Free-flow antenna installation site of trackside is vertical with direction of traffic, and the direction of the radiator normal of described phased array multilane Free-flow antenna and the angle of vehicle direct of travel are 30 ° to 45 °.The primary importance information of described vehicle is calculated in another further aspect of the multilane Free-flow E-payment system that a kind of trackside according to the embodiment of the present invention arranges, described driveway controller according to following formula,
x·tan(α)＝(d-x)·tan(β)，
x·tan(α)＝y，
Wherein α, β are respectively line between the radiator central point of described vehicle carried electronic label and two phased array multilane Free-flow antennas with respect to the angle of track transversal, d is two distances between phased array multilane Free-flow antenna, x is the projection of line on the road transversal of described vehicle carried electronic label and road one side phased array multilane Free-flow antenna, and y is that described vehicle carried electronic label is to the fore-and-aft distance between the road surface transversal at described phased array multilane Free-flow antenna place.
Another further aspect of the multilane Free-flow E-payment system that a kind of trackside according to the embodiment of the present invention arranges, a side at described road also comprises a traffic flow detecting device, be used for the second place information of measuring vehicle and the second temporal information when measuring, send described second place information and the second temporal information to described driveway controller.
Another further aspect of the multilane Free-flow E-payment system that a kind of trackside according to the embodiment of the present invention arranges, described traffic flow detecting device is microwave traffic flow detecting device, perhaps laser/infrared ray traffic flow detecting device is positioned at the one or both sides of the upstream road of described phased array multilane Free-flow antenna.
Another further aspect of the multilane Free-flow E-payment system that a kind of trackside according to the embodiment of the present invention arranges, both sides at the downstream road of described phased array multilane Free-flow antenna also respectively arrange an image acquisition units, the trigger pip of sending to second place information and second temporal information of vehicle according to described traffic flow detector measures, vehicle to specific region in road carries out image acquisition and car plate identification, and described image information and license plate recognition result are sent to described driveway controller.
Another further aspect of the multilane Free-flow E-payment system that a kind of trackside according to the embodiment of the present invention arranges, described driveway controller mates the primary importance information and the very first time information that receive with described second place information and the second temporal information, if the error of described primary importance information and very first time information and described second place information and the second temporal information is in preset range, the match is successful, and driveway controller generates a transaction record; At least one of the error of described primary importance information and very first time information and described second place information and the second temporal information surpasses preset range else if, it fails to match, driveway controller generates an error logging, described driveway controller all is uploaded to background system with this record of two types and corresponding image information, primary importance information, very first time information, second place information and the second temporal information, to carry out charging and inspection.
The present invention is applicable in two-way multilane, unidirectional multilane and one-lane highway, urban road Free-flow Fare Collection System.System by the embodiment of the present invention, can reduce the cost that sets up of multilane Free-flow E-payment system, solved the technical difficulty of setting up portal frame at wide road, and by the charge operation is checked in real time, the problem of receiving and being difficult to check is received, leaked to the mistake that easily causes in the time of can avoiding adopting separately antenna in the Free-flow Fare Collection System or adopt separately image information to charge.
Description of drawings
Read in conjunction with the following drawings the detailed description to embodiment, above-mentioned feature and advantage of the present invention, and extra feature and advantage will be more readily apparent from.
Fig. 1 has provided the structural representation of multilane Free-flow E-payment system according to one embodiment of present invention;
Figure 2 shows that the structural representation of embodiment of the present invention multilane Free-flow E-payment system front end;
Figure 3 shows that the schematic diagram of the primary importance information of embodiment of the present invention calculating OBU;
Figure 4 shows that the embodiment of the present invention utilizes microwave detector to obtain the schematic diagram of vehicle second place information;
Figure 5 shows that the charge process flow diagram of verification of embodiment of the present invention driveway controller.
Embodiment
The invention provides the method and system of the circuit simulation that carries out repeatability.Following description can make any those skilled in the art utilize the present invention.The descriptor that provides in specific embodiment and application only is example.The various extensions of embodiment as described herein and combination are apparent for those skilled in the art, in the situation that do not break away from the spirit and scope of the invention, the rule of the present invention's definition can be applied in other embodiment and application.Therefore, the embodiment shown in the present invention is not only limited to, the maximum magnitude consistent with principle shown in this paper and feature contained in the present invention.
The form that following detailed description is expressed with process flow diagram, logic module and other symbol manipulation provides, and can carry out on computer system.Program, computing machine are carried out step, logical block, process etc., and what be envisioned for one or more steps of obtaining desirable result or instruction here is in harmony sequence certainly.These steps are the physical operationss to physical quantity.These physical quantitys comprise electricity, magnetic or radio signal, and they are stored in computer system, transmit, make up, compare and other operations.But these signal bits, numerical value, element, symbol, character, condition, numeral etc.Each step can be passed through hardware, software, firmware or their combination and carry out.
Fig. 1 has provided according to one embodiment of present invention the structural representation of the multilane Free-flow E-payment system that arranges at trackside.
Comprise at least two phased array multilane Free-flow antennas 101, driveway controller 102;
Described at least two phased array multilane Free-flow antennas 101 are installed relatively in road both sides, the normal of antenna radiator and vehicle heading at angle, described phased array multilane Free-flow antenna 101 is connected with described driveway controller 102.
Described at least two phased array multilane Free-flow antennas 101 are the vehicle carried electronic label and the angle information of this phased array multilane Free-flow antenna on measuring vehicle respectively in the both sides of described road, and the very first time information when measuring sends described driveway controller 102 to this angle information.
The angle information that described driveway controller 102 is measured according at least two phased array multilane Free-flow antennas 101 calculates the primary importance information of described vehicle, primary importance information and the very first time information of described vehicle are preserved, and the operation of charging according to the vehicle carried electronic label of described primary importance information and described vehicle.
Described phased array multilane Free-flow antenna 101 setting height(from bottom)s are at the above 5-6 rice of described pavement of road, the line of a pair of phased array multilane of trackside Free-flow antenna installation site is vertical with direction of traffic, and the direction of the radiator normal of described phased array multilane Free-flow antenna and the angle of direction of traffic are 30 ° to 45 °.
Described driveway controller 102 calculates the primary importance information of described vehicle according to following formula,
x·tan(α)＝(d-x)·tan(β)，
x·tan(α)＝y，
Wherein α, β are respectively line between the radiator central point of described vehicle carried electronic label and two phased array multilane Free-flow antennas with respect to the angle of track transversal, d is two distances between phased array multilane Free-flow antenna, x is the projection of distance on the road transversal of described vehicle carried electronic label and road one side phased array multilane Free-flow antenna, and y is that described vehicle carried electronic label is to the fore-and-aft distance between the road surface transversal at described phased array multilane Free-flow antenna place.
A side at described road also comprises a traffic flow detecting device 103, is used for the second place information of measuring vehicle and the second temporal information when measuring, and sends described second place information and the second temporal information to described driveway controller 102.
Described traffic flow detecting device 103 can be microwave traffic flow detecting device, perhaps can also be laser/infrared ray traffic flow detecting device, is positioned at a side or the both sides of the upstream road of described phased array multilane Free-flow antenna 101.In preferred embodiment, can be positioned at the side of 5 meters of 101 upstreams of phased array multilane Free-flow antenna to 7 meters roads, the sensing range of this traffic flow detecting device 103 can cover the section of whole road.
Both sides at the downstream road of described phased array multilane Free-flow antenna 101 also respectively arrange an image acquisition units 104, measure the second place information of vehicle and the trigger pip that the second temporal information is sent according to described traffic flow detecting device 103, vehicle to specific region in road carries out image acquisition and the identification of front car plate, and described image information and license plate recognition result are sent to described driveway controller 102.
Described driveway controller 102 mates the primary importance information and the very first time information that receive with described second place information and the second temporal information, if the error of described primary importance information and very first time information and described second place information and the second temporal information is in preset range, the match is successful, and driveway controller generates a transaction record; The error of described primary importance information and very first time information and described second place information and the second temporal information surpasses preset range else if, it fails to match, driveway controller generates an error logging, and described driveway controller 102 all is uploaded to background server 105 with this record of two types and corresponding image information, primary importance information, very first time information, second place information and the second temporal information by network.
By above-mentioned technological means, can guarantee to a great extent the integrity problem of ETC Fare Collection System, carry out above-mentioned setting former because, the phased array multilane Free-flow antenna 101 that is positioned at trackside uses wireless communication technology, possesses the electronic tag positioning function, but only depend on single DSRC technology can't guarantee the correctness of concluding the business, also be difficult to carry out real-time or follow-up checking.In order to guarantee as far as possible robotization and the accuracy of transaction, the track end should possess to be checked and verifying function automatically, and therefore, multilane Free-flow system should possess the ability that at least 2 kinds of technological means are identified same the vehicle that electronic tag has been installed.The DSRC communication technology can be identified the information of vehicles that writes in the position of electronic tag and electronic tag; Microwave detection equipment can be identified mistake station location and the speed of vehicle, but None-identified information of vehicles (licence plate); The video capture camera can be identified vehicle license, but for the Free-flow system, vehicle is unfixed through the position of toll station, can lane change travel, therefore, the candid photograph of camera needs other equipment that candid photograph time and positional information are provided, and supports to capture at a high speed.Due to the impact that is subject to external field environment physical environment and car plate accuracy of identification, the result of video capture is checked and the inspection means as just auxiliary, not as the foundation of charging.For same car, the position (primary importance information) of OBU when DSRC exchange hour (very first time information) and transaction, the vehicle that detects with microwave detector miss the stop the time (the second temporal information) and vehicle in the positional information (second place information) of surveyed area, its difference can determine that this vehicle transaction is legal in the scope of setting.
By the system of the embodiment of the present invention, mainly solve the technical barrier that can't set up portal frame above wide road surface, the setting up cost and also can reduce of side-mounted Free-flow Fare Collection System.
Be illustrated in figure 2 as the structural representation of embodiment of the present invention multilane Free-flow E-payment system front end.
Comprise in the figure the first phased array multilane Free-flow antenna 201(RSU1), the second phased array multilane Free-flow antenna 202(RSU2), microwave detector 203, driveway controller 204, the first high-definition camera 205, the second high-definition cameras 206.
Be depicted as vehicle heading in road as the direction of arrow in figure, the surveyed area of netted lines sign phased array multilane Free-flow antenna is across being the surveyed area of microwave detector 203 in the elliptic region of road.
Described phased array multilane Free-flow antenna is installed relatively in road both sides, the employing column is installed, the antenna installation height is 5-6 rice, the normal direction of described phased array multilane Free-flow antenna is pointed to the road opposite and is partial to 30 °～45 ° of directions to the car, and the radiation areas of a pair of phased array multilane Free-flow antenna can cover whole road xsect.
In another embodiment, described phased array multilane Free-flow antenna can also have two or more in a side of road, the phased array multilane Free-flow antenna that has equal number at the opposite side of road, can record like this orientation angles of vehicle by every a pair of corresponding phased array multilane Free-flow antenna, when calculating vehicle position information in the back, can further provide the accuracy of high position information.
Both sides at the upstream road of described phased array multilane Free-flow antenna 101 also can respectively arrange an image acquisition units, measure the second place information of vehicle and the trigger pip that the second temporal information is sent according to described traffic flow detecting device 103, vehicle to specific region in road carries out image acquisition and the identification of rear car plate, and described image information and license plate recognition result are sent to described driveway controller 102.The front and back car plate is captured the accuracy that identification can further improve identification simultaneously.
utilize the first phased array multilane Free-flow antenna 201 and the second phased array multilane Free-flow antenna 202 to measure the orientation angles of vehicle carried electronic label (OBU) on acquisition communication zone interior (being in toll road) vehicle, the orientation angles that driveway controller 204 sends according to two phased array multilane Free-flow antennas is calculated the primary importance information of OBU, wherein measuring the concrete grammar that obtains the OBU orientation angles can be with reference to the implementation method of phased array antenna in prior art, repeat no more in embodiments of the present invention, when calculating the primary importance information of vehicle (being OBU), can be in the following way.
Be illustrated in figure 3 as the embodiment of the present invention and calculate the schematic diagram of the primary importance information of OBU, OBU is positioned at C point position in the figure, road width AB=d, left side the first phased array multilane Free-flow antenna 201(RSU1) the OBU(C point that the OBU(C point that records) azimuth angle alpha, right side the second phased array multilane Free-flow antenna 202(RSU2) records) azimuthal angle beta.
Make line segment CD perpendicular to line AB between two RSU, intersection point is D.If AD length is OBU abscissa value x to be asked, the length of BD is d-x, and establishing CD length is OBU ordinate value y to be asked.
By xtan (α)=y, and (d-x) tan (β)=y,
, xtan (α)=(d-x) tan (β),
In the present embodiment, the frequency of operation of RSDC communication facilities RSU and OBU is deferred to the regulation of " GB/T20851.1 electronic charging Dedicated Short Range Communications, part 1: Physical layer ", downlink carrier frequency is 5.83/5.84GHz, and it is 5.79/5.80GHz that OBU returns to uplink carrier frequency.RSU detects the orientation angles of OBU return signal, then obtains the primary importance information of OBU according to orientation angles.
Simultaneously, driveway controller 204 will be recorded the very first time information when obtaining OBU primary importance information.Described microwave detector 203 obtains the second place information of vehicle by the mode of microwave, described microwave mode is based on the detections of radar principle, and frequency of operation is even 60GHz frequency range of 30GHz.Be limited to 3 meters on vertical perform region that the section of microwave detector detects, this microwave detector 203 can be installed in the vertical rod of trackside, and the setting height(from bottom) of described microwave detector 203 is apart from ground 5.5m left and right.Figure 4 shows that the embodiment of the present invention utilizes microwave detector to obtain the schematic diagram of vehicle second place information, microwave detector road pavement launched microwave, receive simultaneously the signal that object reflects, through being carried out DSP by information, processes by vehicle, and carry out corresponding analytic operation, the second temporal information when obtaining vehicle second place information and measurement provides it to driveway controller 204, and microwave detector is connected with driveway controller by the connection of gigabit express network interface.
also comprise the first high-definition camera 205 and the second high-definition camera 206 in Fig. 2, be connected with described driveway controller 204 respectively, when described driveway controller 204 receives that microwave detector 203 detects the second place information of vehicle in road, driveway controller 204 is notified corresponding high-definition camera according to the second place information of described vehicle, if the second place information that for example detects vehicle in Fig. 2 is positioned at the left side of road, notify the first high-definition camera 205 to carry out image acquisition, if the second place information of vehicle is positioned at the right side of road, notify the second high-definition camera 206 to carry out image acquisition.After high-definition camera receives notice, taken pictures or make a video recording in predefined position, this predefined position is the position of vehicle process, and described high-definition camera sends to background server with the image information of obtaining.
Are advisable to cover whole road toll section in the camera number of image acquisition units and position, detailed protocol can be referring to pertinent literature.
Be illustrated in figure 5 as the charge process flow diagram of verification of embodiment of the present invention Free-flow system front end driveway controller.
Comprise step 500, driveway controller 5ms timing.
The time of typical case's Free-flow charge transaction is the 30-50 millisecond.Enter the vehicle of phased array antenna communication zone, the vehicle carried electronic label of installing on vehicle can send a plurality of uplink data frames, the reference signal that phased array antenna is generally located as this electronic tag take the Frame of receiving first.The data processing unit record of phased array antenna and the scanning result of processing antenna.If for the unit of record, a uplink data frames (1-2 millisecond) of a vehicle carried electronic label can generate 1-2 record to the antenna scanning result with 1 millisecond.If the MAC Address of vehicle carried electronic label OBU1 is 01000001, in continuous 5 milliseconds, the scanning result of phased array antenna is as shown in table 1 below.
Table 1
| Sequence number | The vehicle carried electronic label MAC Address | The received power sampled peak | Antenna scan angle | Sampling instant |
| 1 | - | -100dBm | - | 09:00:00:016 |
| 2 | 01000001 | -45dBm | -10.5° | 09:00:00:017 |
| 3 | - | -110dBm | - | 09:00:00:018 |
| 4 | - | -120dBm | - | 09:00:00:019 |
| 5 | - | -110dBm | - | 09:00:00:020 |
In upper table, when the form of sampling instant is, minute, second, millisecond, the upstream data of OBU1 generates a record in the data processing unit of phased array antenna, and this result is as the testing result of OBU1.For the detection record more than 1 time, as shown in table 2 below,
Table 2
| Sequence number | The vehicle carried electronic label MAC Address | The received power sampled peak | Antenna scan angle | Sampling instant |
| 1 | 09000002 | -50dBm | 5° | 09:00:01:576 |
| 2 | 09000002 | -50dBm | 5° | 09:00:01:577 |
| 3 | - | -130dBm | 09:00:01:578 | |
| 4 | - | -120dBm | 09:00:01:579 | |
| 5 | - | -125dBm | 09:00:01:580 |
Wherein MAC Address is that 09000002 OBU2 generates 2 continuous records in the data processing unit of uplink data frames in phased array antenna, received power sampled peak and the scanning angle of twice record can be done on average, testing result as this electronic tag, time the fetch data zero-time of frame, i.e. 09:00:01:576.
The data processing unit of each phased array antenna is preserved above-mentioned testing result with the form of table 3, memory contents comprises: the sampled peak of upward signal received power, corresponding antenna scan angle, the MAC Address of vehicle carried electronic label, sampling time of this sampled peak, these 4 parameters generate a testing result one to one.
The detection record file layout of table 3 phased array antenna
| Sequence number | The vehicle carried electronic label MAC Address | The received power sampled peak | Antenna scan angle | Sampling instant |
| 1 | 01000001 | -40dBm | -10.5° | 09:00:00:018 |
| 2 | 09000002 | -50dBm | 5° | 09:00:01:576 |
| 3 | 0C000003 | -45dBm | 20.5° | 09:00:02:003 |
| … | … | … | … | … |
Phased array antenna is with the every detection record in table 3, and ETC charge transaction results passes to track computing machine (driveway controller).
The vehicle location detection is to judge contour of the vehicle, position and speed by the microwave signal that detection of reflected is returned, when vehicle arrives the monitored area of microwave detector, microwave detector offers driveway controller with the lateral attitude of vehicle place road and the temporal information that arrives surveyed area at once, i.e. second place information and the second temporal information.
Due to high vehicle speeds, therefore send trigger pip from microwave detector, send candid photograph information to driveway controller to video camera, the time should be in 5ms.
High-definition camera offers driveway controller with image information and license plate recognition result.
Because the processing time of compression of images and car plate identification is longer, so this image information should provide the candid photograph temporal information, simultaneously in the lump in order to compare with the testing result of RSU and microwave detector when offering driveway controller.
The coupling of driveway controller is to be based upon on strict synchronous basis of subsystems time, so driveway controller can regularly carry out synchronously each equipment time, in order to avoid time of occurrence drifts about.
Carrying out vehicle location when coupling, Main Basis is vehicle lateral attitude, residing track when crossing area of charge, more precisely, is the x axial coordinate value of vehicle center point, and this parameter is provided simultaneously by wagon detector and phased array antenna.
The matching operation of driveway controller is carried out continuously take 5ms as base unit, if within 5ms, receive very first time information and the primary importance information of RSU, and the second temporal information of microwave detector and second place information, and the difference of very first time information and the second temporal information is less than setting value (100ms), and the difference of primary importance information and second place information is less than setting value (2 meters) simultaneously, and driveway controller thinks that the match is successful, this transaction for correct transaction, is entered step 505; If the difference of the very first time information of receiving and the second temporal information is greater than setting value, perhaps the difference of primary importance information and second place information greater than setting value, enters step 506.
If within 5ms, only receive very first time information and the primary importance information of RSU, there is no the second temporal information and the second place information of microwave detector, enter step 507.
If within 5ms, only receive the second temporal information and the second place information of microwave detector, there is no very first time information and the primary importance information of RSU, enter step 508.
If within 5ms, without any detection information, driveway controller re-executes step 500, enters next 5ms.
System by the embodiment of the present invention, can reduce the cost that sets up of multilane Free-flow E-payment system, and solved the technical difficulty of setting up gantry at wide road, lane toll system is checked the charge operation by Auto-matching, reduces manually-operated cost.
In the present embodiment, the accuracy of detection of phased array antenna is 0.5 meter, and the accuracy of detection of microwave detector is 0.5 meter.If adopt laser detector to replace described microwave detector, be arranged on road one side or both sides, the accuracy of detection of vehicle location may be higher, reaches 0.01 meter.
Above-described embodiments of the invention are with reference to different functional units and processor.Yet, it is evident that, in harmless situation of the present invention, can use any suitable function combination between different function units or processor.For example, the function in multiprocessor or controller execution may be carried out on single processor or controller.Therefore, specific functional units quote the appropriate means that should be regarded as be used to described function is provided, rather than specially refer in certain specific logic, physical arrangement or institutional framework.
The present invention can realize with any suitable form, comprise hardware, software, firmware or their combination in any.The present invention can be according to circumstances selectively part realize, such as software performing in one or more data processors and digital signal processor.The element of each embodiment of this paper and assembly can be physically, on function, realize in any suitable manner in logic.In fact, function can be in separate unit, in one group of unit or is realized as the part of other functional units.Therefore, this system and method both can be realized in separate unit, also can physically and be distributed on function between different unit and processor.
Technician in association area will recognize that, embodiments of the invention have many possible modifications and combination, although form is slightly different, still adopts identical fundamental mechanism and method.For the purpose of explaining, aforementioned description is with reference to several specific embodiment.Yet above-mentioned illustrative discussion is not intended to precise forms exhaustive or that restriction this paper invents.Shown in preamble, many modifications and variations are possible.Selected and described embodiment in order to explain principle of the present invention and practical application thereof, uses so that those skilled in the art can utilize the modification for application-specific, the distortion of the present invention and each embodiment best.
Claims (7)
1. the multilane Free-flow E-payment system that trackside arranges, is characterized in that comprising,
At least two phased array multilane Free-flow antennas, driveway controller;
Described at least two phased array multilane Free-flow antennas are installed relatively in road both sides, and the antenna radiator normal direction becomes fixed angle with vehicle heading, and described phased array multilane Free-flow antenna is connected with described driveway controller;
Described at least two phased array multilane Free-flow antennas are the vehicle carried electronic label and the angle information of this phased array multilane Free-flow antenna on measuring vehicle respectively in the both sides of described road, and the very first time information when measuring sends described driveway controller to this angle information;
Described driveway controller calculates the primary importance information of described vehicle at least according to the angle information of two phased array multilane Free-flows antenna measurement, primary importance information and the very first time information of described vehicle are preserved, and carry out billing operation according to the vehicle carried electronic label of described primary importance information and described vehicle.
2. the multilane Free-flow E-payment system that arranges of a kind of trackside according to claim 1, it is characterized in that, described phased array multilane Free-flow antenna setting height(from bottom) is at the above 5-6 rice of described pavement of road, for unidirectional track, the line of a pair of phased array multilane Free-flow antenna installation site of trackside is vertical with direction of traffic, and the direction of the radiator normal of described phased array multilane Free-flow antenna and the angle of vehicle direct of travel are 30 ° to 45 °.
3. the multilane Free-flow E-payment system of a kind of trackside setting according to claim 1, is characterized in that, described driveway controller calculates the primary importance information of described vehicle according to following formula,
x·tan(α)＝(d-x)·tan(β)，
x·tan(α)＝y，
Wherein α, β are respectively line between the radiator central point of described vehicle carried electronic label and two phased array multilane Free-flow antennas with respect to the angle of track transversal, d is two distances between phased array multilane Free-flow antenna, x is the projection of line on the road transversal of described vehicle carried electronic label and road one side phased array multilane Free-flow antenna, and y is that described vehicle carried electronic label is to the fore-and-aft distance between the road surface transversal at described phased array multilane Free-flow antenna place.
4. the multilane Free-flow E-payment system that arranges of a kind of trackside according to claim 1, it is characterized in that, a side at described road also comprises a traffic flow detecting device, be used for the second place information of measuring vehicle and the second temporal information when measuring, send described second place information and the second temporal information to described driveway controller.
5. the multilane Free-flow E-payment system that arranges of a kind of trackside according to claim 4, it is characterized in that, described traffic flow detecting device is microwave traffic flow detecting device, perhaps laser/infrared ray traffic flow detecting device is positioned at the one or both sides of the upstream road of described phased array multilane Free-flow antenna.
6. the multilane Free-flow E-payment system that arranges of a kind of trackside according to claim 4, it is characterized in that, both sides at the downstream road of described phased array multilane Free-flow antenna also respectively arrange an image acquisition units, the trigger pip of sending to second place information and second temporal information of vehicle according to described traffic flow detector measures, vehicle to specific region in road carries out image acquisition and the identification of front car plate, and described image information and license plate recognition result are sent to described driveway controller.
7. the multilane Free-flow E-payment system that arranges of a kind of trackside according to claim 6, it is characterized in that, described driveway controller mates the primary importance information and the very first time information that receive with described second place information and the second temporal information, if the error of described primary importance information and very first time information and described second place information and the second temporal information is in preset range, the match is successful, and driveway controller generates a transaction record; The error of described primary importance information and very first time information and described second place information and the second temporal information has one to surpass preset range else if, it fails to match, driveway controller generates an error logging, described driveway controller all is uploaded to background server with this record of two types and corresponding image information, primary importance information, very first time information, second place information and the second temporal information, to carry out charging and inspection.
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