CN102426349A - Vehicle positioning method and device of ETC (Electronic Toll Collection) system, and ETC system - Google Patents
Vehicle positioning method and device of ETC (Electronic Toll Collection) system, and ETC system Download PDFInfo
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Abstract
The invention relates to a vehicle positioning method and device of an ETC (Electronic Toll Collection) system and an ETC system. The device comprises a phased array radiating array, a phase shifter and a data processing unit, wherein the phased array radiating array is used for providing accurate positioning distinguishing angle wave beams used for wave beam scanning to a road surface; the phase shifter is used for controlling the phase position between radiators of the phased array radiating array so as to form a plurality of wave beam positioning areas arranged along the longitudinal direction of a road on the road surface and controlling the phased array radiating array to capture microwave signals emitted by an on board unit (OBU) entering a wave beam positioning area; and the data processing unit is used for generating the position data of a detected vehicle corresponding to the OBU according to the angles of the wave beams of the captured microwave signals emitted by the OBU. The longitudinal position of the vehicle is accurately positioned so as to find out the information of no-label vehicles or unsuccessfully traded vehicles in a toll collection system.
Description
Technical Field
The invention relates to a highway electronic toll collection technology, in particular to a drive test technology in an electronic toll collection system, and specifically relates to a vehicle positioning method and device of an ETC system and an ETC system.
Background
Electronic Toll Collection (ETC) systems are also known as ETC systems. The ETC system uses a Dedicated Short-range communication (DSRC) technology to complete the entire toll collection process, so that the vehicle can maintain a driving state without parking during the entire toll collection process.
The ETC vehicle longitudinal positioning aims at determining the physical position of the vehicle-mounted electronic tag in a communication area and completing inspection of violation vehicles by matching with a video snapshot system. Therefore, the toll of the vehicle without the electronic tag or the tag vehicle with the unsuccessful transaction in the electronic charging system can be ensured to be chased.
As shown in fig. 1, in the ETC system of the prior art, an on-board unit (OBU) stores an identification code of a vehicle and other data related to vehicle attributes, and when the vehicle 101 enters an identification area 1001 of a drive test equipment (RSU)100, the OBU of the vehicle 101 can transmit the data to the RSU100, and the RSU100 can perform the functions of vehicle authentication and charging through a local or remote data Processing Device (PDU). The RSU100 may also send various data regarding to the OBU for toll deduction.
However, there are some disadvantages in the existing ETC system, and the existing ETC system is that after the OBU enters the transaction area, the RSU and the OBU perform transaction, and the position of the OBU is detected according to the microwave signal intensity replied by the OBU, thereby realizing longitudinal positioning. However, this longitudinal location detection method relies on the uniformity of all OBU transmission powers, and if the respective OBU transmission powers are not uniform, this method cannot accurately locate the longitudinal position of the vehicle.
For example: in fig. 2, the vehicle 101 and the vehicle 102 enter the identification area 1001 at the same time, the OBU transmission power of the vehicle 101 is weaker than that of the vehicle 102, and the vehicle 101 is closer to the RSU100 than the vehicle 102, in this case, the intensity of the microwave signals emitted by the vehicle 101 and the vehicle 102 collected by the RSU100 may be the same, so the method for checking the position of the OBU according to the intensity of the microwave signals cannot correctly judge the positions of the vehicle 101 and the vehicle 102.
If the longitudinal position of the vehicle cannot be accurately positioned, the vehicle information of the vehicle without the electronic tag or the vehicle with the tag which fails in transaction in the electronic toll collection system cannot be accurately found, and the vehicle toll collection of the vehicle without the electronic tag or the vehicle with the tag which fails in transaction cannot be completed.
Disclosure of Invention
The embodiment of the invention provides a vehicle positioning method and device of an ETC system and an ETC system, which aim to solve the problem of accurately positioning the longitudinal position of a vehicle and further solve the problem of vehicle information search of a vehicle without an electronic tag or a tag vehicle with unsuccessful transaction in the ETC system.
One object of the present invention is a vehicle positioning method of an ETC system, the method including: providing accurate positioning resolution angle wave beams for wave beam scanning on a road surface by adopting a phased array radiation array; controlling the phase between radiators of the phased array radiation array by adopting a phase shifter, enabling the phased array radiation array to form a plurality of beam positioning areas which are longitudinally arranged along a highway on a highway surface, and controlling the phased array radiation array to capture microwave signals transmitted by an OBU (on board unit) running into the beam positioning areas; and generating the position data of the detected vehicle corresponding to the OBU according to the angle of the wave beam of the microwave signal transmitted by the OBU.
One object of the present invention is to provide a vehicle positioning device of an ETC system, the device including: a phased array radiating array for providing a precisely positioned resolved angle beam for beam scanning onto a road surface; the phase shifter is used for controlling the phase between radiators of the phased array radiation array, enabling the phased array radiation array to form a plurality of beam positioning areas which are longitudinally arranged along a highway on a highway surface, and controlling the phased array radiation array to capture microwave signals transmitted by an OBU (on board unit) which enters the beam positioning areas; and the data processing unit is used for generating the position data of the detected vehicle corresponding to the OBU according to the angle of the captured microwave signal beam emitted by the OBU.
One of the objects of the present invention is to provide an electronic toll collection system, which includes: a vehicle positioning device and a billing server; the vehicle positioning device includes: the microwave radio frequency antenna is used for emitting microwaves to a road surface, forming a microwave identification area for identifying an OBU (on-board unit) on the road surface, and performing charging data interaction with the OBU of a vehicle to be tested running into the microwave identification area; a phased array radiating array for providing a precisely positioned resolved angle beam for beam scanning onto a road surface; the phase shifter is used for controlling the phase between radiators of the phased array radiation array, so that the phased array radiation array forms a plurality of beam positioning areas which are longitudinally arranged along a road in a microwave identification area, and the phased array radiation array is controlled to capture microwave signals transmitted by an OBU (on board unit) which enters the beam positioning areas; the data processing unit is used for generating position data of a detected vehicle corresponding to the OBU according to the angle of the captured microwave signal beam emitted by the OBU; a data communication unit for transmitting the charging data and the position data of the vehicle under test to the billing server; and the charging server generates and outputs the vehicle information and the payment information of the tested vehicle according to the charging data and the position data of the tested vehicle.
One of the objects of the present invention is to provide an electronic toll collection system, which includes: the system comprises a drive test unit (RSU), a positioning device and a charging server; the RSU is respectively connected with the positioning device and the charging server; the positioning device includes: a phased array radiating array for providing a precisely positioned resolved angle beam for beam scanning onto a road surface; the phase shifter is used for controlling the phase between radiators of the phased array radiation array, so that the phased array radiation array forms a plurality of wave beam positioning areas which are longitudinally arranged along a road on the road surface, and the phased array radiation array is controlled to capture microwave signals transmitted by an OBU (on board unit) which enters the wave beam positioning areas; the RSU includes: the microwave radio frequency antenna is used for emitting microwaves to a road surface, forming a microwave identification area for identifying an OBU (on-board unit) on the road surface, and performing charging data interaction with the OBU of a vehicle to be tested running into the microwave identification area; the data processing unit is used for generating position data of the detected vehicle corresponding to the OBU according to the angle and time of the wave beam output by the positioning device; a data communication unit for transmitting the charging data and the position data of the vehicle under test to the billing server; and the charging server generates and outputs the vehicle information and the payment information of the tested vehicle according to the charging data and the position data of the tested vehicle.
The invention has the advantages that the longitudinal positioning of the ETC vehicle is realized, the physical position of the vehicle-mounted electronic tag in the communication area is accurately determined, and the vehicle information of the vehicle without the electronic tag or the vehicle without the tag which fails in transaction in the electronic toll collection system is found by matching with the video snapshot system, so that the check of the vehicle against the traffic regulations of the ETC vehicle is realized, and the overtaking payment of the toll of the vehicle without the electronic tag or the vehicle with the tag which fails in transaction in the electronic toll collection system is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic diagram of an electronic toll collection system and a lane according to the prior art;
FIG. 2 is a schematic view of a prior art vehicle longitudinal positioning and lane;
FIG. 3 is a flowchart illustrating a method for locating a vehicle in an ETC system according to an embodiment of the present invention;
FIG. 4 is a schematic block circuit diagram of a vehicle locating device of the ETC system in accordance with an embodiment of the present invention;
FIG. 5 is a block diagram of an embodiment of the ETC system of the present invention;
FIG. 6 is a block diagram of a ETC system with an RSU according to an embodiment of the present invention;
FIG. 7 is a schematic view of a lane and setup of a device for longitudinal positioning using phased array radiating arrays in accordance with an embodiment of the present invention;
fig. 8 is a schematic diagram of a lane and setup of a device for longitudinal positioning using a 6-beam phased array radiating array according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 3, the vehicle positioning method of the ETC system of the present embodiment includes the steps of: providing a precisely positioned resolved angle beam for beam scanning onto a road surface using a phased array radiating array (step S101); controlling the phase between radiators of the phased array radiation array by adopting a phase shifter, so that the phased array radiation array forms a plurality of beam positioning areas which are longitudinally arranged along a road on the road surface, and controlling the phased array radiation array to capture microwave signals transmitted by an on-board unit (OBU) running into the beam positioning areas (step S102); and generating the position data of the detected vehicle corresponding to the OBU according to the captured angle of the wave beam of the microwave signal emitted by the OBU (step S103).
In the embodiment, a microwave radio frequency antenna can be adopted to emit microwaves to a road surface, a microwave identification area for identifying the OBU is formed on the road surface, and the microwave radio frequency antenna and the OBU of the vehicle to be detected running into the microwave identification area perform charging data interaction; the plurality of beam positioning areas which are longitudinally arranged along the road are formed in the microwave identification area; and sending the charging data and the position data of the tested vehicle to a background for charging processing. The step of generating the position data of the detected vehicle corresponding to the OBU according to the captured angle of the wave beam of the microwave signal emitted by the OBU comprises the following steps: and establishing a mapping relation between the beam angle and the position. The corresponding position can be found out in the mapping relation between the beam angle and the position according to the angle of the beam capturing the microwave signal transmitted by the OBU, so that the position data of the detected vehicle corresponding to the OBU is generated.
As shown in fig. 7, in implementing the vehicle positioning method of the ETC system of the present embodiment, a positioning device 200 ″ having a phased array radiation array and a road test unit 200' (RSU) having a microwave rf antenna may be installed on a gantry 400, the positioning device 200 ″ is connected to a road surface control system (e.g., a billing server) via a cable, and the road surface control system sends a command to control the phased array radiation array of the positioning device 200 ″ to perform beam scanning.
The phased array radiation array of the positioning device 200 ' performs beam scanning in the identification area 1001 of the RSU200 ' and the on-board unit OBU101, the number of radiators (only the receivers of the radiators can be adopted) and the radiation unit spacing of the positioning device 200 ' are designed, the proportion of the power divider and the selection of the phase shifter chip control the number of beams and the scanning angle, and a plurality of beam positioning areas arranged along the longitudinal direction of the road are formed in the microwave identification area 1001 (2001-. After the vehicle-mounted device enters the identification area 1001, the phased array radiation array of the positioning device 200 ″ transmits the time of the microwave signal sent by the vehicle-mounted device OBU101 and the beam angle of the antenna to the road surface control system through a cable, and the position of the vehicle-mounted unit is determined according to the relationship between the beam angle and the lane position. Specifically, after the on-board unit OBU101 enters the identification area 1001 of the RSU200 ', a transaction is performed with the RSU 200'. At this time, the radiator receiver of the phased array radiation array of the positioning device 200 ″ mounted beside the RSU 200' does not stop in the transaction area to perform beam scanning (each beam marks a position), the microwave signal replied when the on-board unit OBU101 performs transaction is captured by a certain beam of the phased array radiation array, the computer records the time at this time and determines the captured beam angle, and the position of the on-board unit is determined according to the position corresponding to each beam angle which is marked in advance. The drive test method has the advantage that the longitudinal position of each OBU can be accurately positioned even if the transmitting power of each OBU is different.
Example 2
As shown in fig. 4, the vehicle positioning device of the ETC system of the present embodiment includes: the microwave radio frequency antenna 201 is used for emitting microwaves to a highway surface, forming a microwave identification area for identifying an OBU (on-board unit) on the highway surface, and performing charging data interaction with the OBU of a vehicle to be tested in the driven microwave identification area; the phased array radiation array (comprising a plurality of radiators 202) is used for carrying out beam scanning on the microwave identification area, forming a plurality of beam positioning areas which are longitudinally arranged along a road in the microwave identification area and capturing microwave signals emitted by an OBU (on-board unit) running into the beam positioning areas; the phase shifter 203 is used for controlling the phase of the radiation beam of the radiator 202 corresponding to the phased array radiation array; and the data processing unit 204 is configured to generate position data of the vehicle to be tested corresponding to the OBU according to the angle of the beam capturing the microwave signal transmitted by the OBU.
The vehicle positioning device of the ETC system of the present embodiment further includes: and the data communication unit 205 is used for sending the charging data and the position data of the tested vehicle to the background for charging processing. A data storage unit 206, configured to store a mapping relationship between the beam angle and the position data.
In the vehicle positioning device of the ETC system, the modem 207 and the HDLC codec unit 208 may be used to perform modulation/demodulation processing and codec processing on signals received and transmitted by the microwave rf antenna 201, and to perform modulation/demodulation processing and codec processing on signals received and transmitted by the radiators 202 of the phased array radiation array. The proportion of the power divider 209 and the selection of the phase shifter 203 control the number of beams and the scanning angle, and a plurality of beam positioning areas arranged along the longitudinal direction of the road are formed in the microwave identification area. The vehicle positioning device of the ETC system may further include an operating power supply 210.
In this embodiment, the radiators 202 of the phased array radiating array can achieve the technical effects of the present invention by using only the radiator receivers.
As shown in fig. 5, the electronic toll collection system of the present embodiment includes: a vehicle locating device 200 and a billing server 300; the vehicle positioning device 200 includes: the microwave radio frequency antenna 201 is used for emitting microwaves to a highway surface, forming a microwave identification area for identifying an on-board unit (OBU) on the highway surface, and performing charging data interaction with the OBU of a detected vehicle entering the microwave identification area; the phased array radiation array 202' is used for carrying out wave beam scanning on the microwave identification area, forming a plurality of wave beam positioning areas which are arranged along the longitudinal direction of a road in the microwave identification area and capturing microwave signals emitted by an OBU (on-board unit) which enters the wave beam positioning areas; a phase shifter 203 for controlling the phase of the transmission beam of the phased array radiating array; the data processing unit 204 is configured to generate position data of the vehicle to be detected corresponding to the OBU according to an angle of a beam capturing a microwave signal emitted by the OBU; a data communication unit 205 for transmitting the charging data and the position data of the vehicle under test to the billing server 300; a data storage unit 206, configured to store a mapping relationship between the beam angle and the position data. And the charging server 300 generates and outputs the vehicle information and payment information of the vehicle to be tested according to the charging data and the position data of the vehicle to be tested.
In the vehicle positioning device 200, the HDLC codec unit may be used to perform codec processing on signals received and transmitted by the microwave rf antenna 201, and to perform codec processing on signals received and transmitted by the phased array radiation array 202'. The vehicle positioning device of the ETC system may further include an operating power supply.
As shown in fig. 6, the electronic toll collection system of the present embodiment includes: the drive test equipment RSU200 ', the positioning device 200' and the charging server 300; the RSU 200' is connected to the positioning means 200 "and the billing server 300, respectively.
The positioning device comprises a 200': the phased array radiation array 202' is used for carrying out wave beam scanning on a microwave identification area, forming a plurality of wave beam positioning areas which are arranged along the longitudinal direction of a road in the microwave identification area, capturing microwave signals emitted by an OBU (on-board unit) entering the wave beam positioning areas, and outputting angles and time for capturing wave beams of the microwave signals emitted by the OBU; a phase shifter 203 for controlling the phase of the transmit beam of the phased array radiating array.
The RSU 200' includes: the microwave radio frequency antenna 201 is used for emitting microwaves to a highway surface, forming a microwave identification area for identifying an on-board unit (OBU) on the highway surface, and performing charging data interaction with the OBU of a detected vehicle entering the microwave identification area; the data processing unit 204 is used for generating position data of the detected vehicle corresponding to the OBU according to the angle and time of the beam output by the positioning device 200'; a data communication unit 205 for transmitting the charging data and the position data of the vehicle under test to the billing server 300; a data storage unit 206, configured to store a mapping relationship between the beam angle and the position data. And the charging server 300 generates and outputs the vehicle information and payment information of the vehicle to be tested according to the charging data and the position data of the vehicle to be tested.
In one embodiment of the RSU200 ', the RSU 200' may include: the system comprises a microwave radio frequency antenna, a microcontroller, a serial interface, a network interface, a field bus interface, an SD card module, a PSAM module, an HDLC codec, a FlashRom module and other functional modules. The microwave radio frequency antenna is used for controlling the transmission and the reception of microwave signals and finishing the air data interaction between the RSU transaction module and the OBU. The HDLC coding and decoding unit is realized through a hardware coder and decoder, so that the bit error rate of data received and transmitted in the air is better reduced compared with software coding and decoding, the real-time coding and decoding of the data are ensured, the fault-tolerant capability of the coding and decoding data is improved, the transaction time is effectively shortened, and the transaction success rate is improved. The FlashRom module is responsible for storing relevant working parameters of the RSU trading module and ensuring that the working state of the trading module is normal after the trading module is powered on every time. The SD card module adopts a high-capacity SD card to realize the mass storage of the RSU transaction module on transaction records, an advanced storage management mechanism ensures the reliable and rapid access of data, and supports various types of cards such as MMC, SD, SDHC and the like, and the maximum support is 32GB of the SD card. A PSAM module: and the system security module is responsible for identity authentication with an ESAM (electronic service access module) in the OBU (on-board unit) equipment and consumption security authentication with the user card. The serial interface and the network interface are responsible for data interaction between the microcontroller and the host, and the RSU transaction module can upload transaction data to a host system through the serial interface or the network interface and simultaneously receive various operation instructions issued by the host in real time. The field bus interface is responsible for a RSU transaction module synchronization mechanism, namely all RSU transaction modules of the same traffic section are subjected to hardware synchronization, OBU positioning information of the RSU positioning antenna module based on the field bus technology is received, the RSU transaction module rapidly judges the position of the OBU in a communication area according to the positioning information, and then actively requires or gives up transaction with the OBU, so that only one RSU is ensured to transmit radio frequency signals to the outside at the same time, and the contradiction between the antenna coverage range of the RSU transaction module and cross interference is thoroughly solved.
As shown in fig. 7, in implementing the vehicle positioning device and the electronic toll collection system of the ETC system of the present embodiment, the positioning device 200 ″ having a phased array radiation array and the road test unit 200' (RSU) having a microwave rf antenna may be installed on the gantry 400, the positioning device 200 ″ is connected to the road surface control system (e.g., the billing server 300) through a cable, and the road surface control system transmits a command to control the positioning device 200 ″ to perform beam scanning.
The positioning device 200 ″ scans beams in the RSU 200' and the OBU identification area 1001, and forms a plurality of beam positioning areas arranged along the longitudinal direction of the road in the microwave identification area 1001 by designing the number of radiation units and the distance between the radiation units, the proportion of the power divider and the selection of the phase shifter chip to control the number of beams and the scanning angle of the positioning device 200 ″ (2001-. After the on-board unit 101 enters the identification area 1001, the positioning device 200 ″ transmits the time when the microwave signal transmitted by the on-board unit OBU101 is acquired and the beam angle of the antenna at that time to the road surface control system through a cable, and determines the position of the on-board unit according to the relationship between the beam angle and the lane position. Specifically, after the on-board unit OBU101 enters the identification area 1001 of the RSU200 ', a transaction is performed with the RSU 200'. At this time, the positioning device 200 ″ mounted beside the RSU 200' continuously scans the beam in the transaction area (each beam marks a position), the microwave signal returned when the on-board unit OBU101 performs a transaction is captured by a certain beam of the phased array module, the computer records the time and determines the angle of the captured beam, and the position of the on-board unit is determined according to the position corresponding to each beam angle which is marked in advance. The drive test method has the advantage that the longitudinal position of each OBU can be accurately positioned even if the transmitting power of each OBU is different.
As shown in fig. 8, a schematic diagram of a lane and setup of a device for longitudinal positioning with a 6-beam phased array radiating array. The road test equipment RSU and the positioning device are hung on an equipment support at the height of H, the angle between the road test equipment RSU and the positioning device and the horizontal plane can be 45 degrees, the angle and the number of the beams can be designed according to actual precision through designing the number of the radiation units of the positioning device, the distance between the radiation units, the proportion of the power divider and the selection of the phase shifter chip, the 6 beams are designed to be scanned (the angle and the number of the beams can be designed according to the actual precision, the 6 beams are exemplified and distributed in the identification areas of the road test equipment and the vehicle-mounted equipment in sequence, the longitudinal distance corresponding to the beams is calibrated, the position under the road test equipment RSU is used as the origin, and the longitudinal distances corresponding to the 6 beams a, b, c, d, e and f are A, B, C, D, E, F respectively.
Taking the vehicle-mounted device entering the test area as an example, the vehicle-mounted device M and the vehicle-mounted device N are respectively, if the vehicle-mounted device M transacts in the area d and the vehicle-mounted device N transacts in the area b, the traditional test method cannot determine in which area the vehicle-mounted device M transacts because the transmission power of the vehicle-mounted device M and the transmission power of the vehicle-mounted device N are different.
Assuming that the transmission power of the vehicle-mounted device M is lower than that of the vehicle-mounted device N, but the spatial attenuation of power between the vehicle-mounted device M and the drive test device RSU is smaller than that of the vehicle-mounted device N, there may be a fact that the transmission power of the vehicle-mounted device M + the spatial attenuation of the vehicle-mounted device M to the drive test device RSU is equal to the transmission power of the vehicle-mounted device N + the spatial attenuation of the vehicle-mounted device vehicle to the drive test device RSU. In this way, the signal strength of the two vehicles received by the drive test equipment is consistent, the longitudinal position of the two vehicles is judged by the traditional method according to the signal strength of the signals transmitted by the two vehicles reaching the drive test equipment, and at this time, the longitudinal positioning of the drive test equipment RSU considers that the longitudinal positions of the vehicle-mounted equipment M and the vehicle-mounted equipment N are one position, that is, the two vehicles are the same vehicle.
After the positioning device aiming at longitudinal positioning in the embodiment is added, in a transaction, microwave signals sent and replied by the vehicle-mounted device M and the vehicle-mounted device N are respectively captured by continuously scanned beams, according to an algorithm, the capturing time and the capturing time of which beams can be captured (for example, the vehicle-mounted device M is captured by a beam D, and the vehicle-mounted device N is captured by a beam B) can be known, the strength of signals sent by the same OBU captured by different beams is different, a computer can determine the beam with the strongest captured signal as a capturing beam, then the longitudinal position of the vehicle-mounted device M in the transaction is determined as D according to a beam calibration value, and the longitudinal position of the vehicle-mounted device N in the transaction is.
The electronic toll collection system realizes longitudinal positioning of the ETC vehicle, accurately determines the physical position of the vehicle-mounted electronic tag in the communication area, and is matched with the video snapshot system to find the vehicle information of the vehicle without the electronic tag or the vehicle without the tag which fails in transaction in the electronic toll collection system, so that the inspection of the vehicle violating the ETC vehicle is realized, and the follow-up payment of the toll of the vehicle without the electronic tag or the vehicle with the tag which fails in transaction in the electronic toll collection system is ensured.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A vehicle positioning method of an ETC system is characterized by comprising the following steps:
providing accurate positioning resolution angle wave beams for wave beam scanning on a road surface by adopting a phased array radiation array;
controlling the phase between radiators of the phased array radiation array by adopting a phase shifter, so that the phased array radiation array forms a plurality of wave beam positioning areas which are longitudinally arranged along a road on the road surface, and controlling the phased array radiation array to capture microwave signals emitted by an on-board unit (OBU) which drives into the wave beam positioning areas;
and generating the position data of the detected vehicle corresponding to the OBU according to the captured angle of the wave beam of the microwave signal emitted by the OBU.
2. The method of claim 1, further comprising:
emitting microwaves to the road surface by adopting a microwave radio frequency antenna, forming a microwave identification area for identifying the OBU on the road surface, and performing charging data interaction with the OBU of a vehicle to be tested running into the microwave identification area;
the plurality of beam positioning areas which are longitudinally arranged along the road are formed in the microwave identification area;
and sending the charging data and the position data of the tested vehicle to a background for charging processing.
3. The method of claim 1, wherein said generating location data for the vehicle under test corresponding to the OBU based on the captured angle of the beam of the microwave signal emitted by the OBU comprises: and establishing a mapping relation between the beam angle and the position.
4. A vehicle positioning device for an ETC system, said device comprising:
a phased array radiating array for providing a precisely positioned resolved angle beam for beam scanning onto a road surface;
the phase shifter is used for controlling the phase among radiators of the phased array radiation array, so that the phased array radiation array forms a plurality of beam positioning areas which are longitudinally arranged along a road on the road surface, and the phased array radiation array is controlled to capture microwave signals emitted by an on-board unit (OBU) which drives into the beam positioning areas;
and the data processing unit is used for generating the position data of the detected vehicle corresponding to the OBU according to the captured angle of the wave beam of the microwave signal transmitted by the OBU.
5. The apparatus of claim 4, further comprising:
the microwave radio frequency antenna is used for emitting microwaves to the highway surface, forming a microwave identification area for identifying an OBU (on-board unit) on the highway surface, and performing charging data interaction with the OBU of a vehicle to be tested running into the microwave identification area;
the data communication unit is used for sending the charging data and the position data of the tested vehicle to a background for charging processing; wherein,
the phased array radiation array forms a plurality of wave beam positioning areas which are longitudinally arranged along the road in the microwave identification area.
6. The apparatus of claim 4, further comprising: and the data storage unit is used for storing the mapping relation between the beam angle and the position data.
7. An electronic toll collection system, comprising: a vehicle positioning device and a billing server;
the vehicle positioning device comprises:
the microwave radio frequency antenna is used for emitting microwaves to a road surface, forming a microwave identification area for identifying an OBU (on-board unit) on the road surface, and performing charging data interaction with the OBU of a vehicle to be tested running into the microwave identification area;
a phased array radiating array for providing a precisely positioned resolved angular beam for beam scanning onto said road surface;
the phase shifter is used for controlling the phase among radiators of the phased array radiation array, so that the phased array radiation array forms a plurality of beam positioning areas which are longitudinally arranged along the road in the microwave identification area, and the phased array radiation array is controlled to capture microwave signals emitted by an on-board unit (OBU) which drives into the beam positioning areas;
the data processing unit is used for generating position data of a detected vehicle corresponding to the OBU according to the captured angle of the wave beam of the microwave signal emitted by the OBU;
a data communication unit for transmitting the charging data and the position data of the vehicle to be tested to the billing server;
and the charging server generates and outputs the vehicle information and the payment information of the tested vehicle according to the charging data and the position data of the tested vehicle.
8. The system of claim 7, wherein said vehicle positioning means further comprises: and the data storage unit is used for storing the mapping relation between the beam angle and the position data.
9. An electronic toll collection system, comprising: the system comprises a drive test unit (RSU), a positioning device and a charging server;
the RSU is respectively connected with the positioning device and the charging server;
the positioning device comprises:
a phased array radiating array for providing a precisely positioned resolved angle beam for beam scanning onto a road surface;
the phase shifter is used for controlling the phase among radiators of the phased array radiation array, so that the phased array radiation array forms a plurality of beam positioning areas which are longitudinally arranged along a road on the road surface, and the phased array radiation array is controlled to capture microwave signals emitted by an on-board unit (OBU) which drives into the beam positioning areas;
the RSU comprises:
the microwave radio frequency antenna is used for emitting microwaves to the road surface, forming a microwave identification area for identifying an on-board unit (OBU) on the road surface, and performing charging data interaction with the OBU of a vehicle to be tested running into the microwave identification area;
the data processing unit is used for generating position data of the detected vehicle corresponding to the OBU according to the angle and time of the wave beam output by the positioning device;
a data communication unit for transmitting the charging data and the position data of the vehicle to be tested to the billing server;
and the charging server generates and outputs the vehicle information and the payment information of the tested vehicle according to the charging data and the position data of the tested vehicle.
10. The system of claim 9, wherein said RSU further comprises: and the data storage unit is used for storing the mapping relation between the beam angle and the position data.
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| CN2011103478878A CN102426349A (en) | 2011-11-07 | 2011-11-07 | Vehicle positioning method and device of ETC (Electronic Toll Collection) system, and ETC system |
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| CN2011103478878A CN102426349A (en) | 2011-11-07 | 2011-11-07 | Vehicle positioning method and device of ETC (Electronic Toll Collection) system, and ETC system |
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| CN2011103478878A Pending CN102426349A (en) | 2011-11-07 | 2011-11-07 | Vehicle positioning method and device of ETC (Electronic Toll Collection) system, and ETC system |
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