CN111915754A - Split type RSU - Google Patents
Split type RSU Download PDFInfo
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- CN111915754A CN111915754A CN202010933655.XA CN202010933655A CN111915754A CN 111915754 A CN111915754 A CN 111915754A CN 202010933655 A CN202010933655 A CN 202010933655A CN 111915754 A CN111915754 A CN 111915754A
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- license plate
- rsu
- control device
- recognition camera
- plate recognition
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B15/00—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points
- G07B15/06—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems
- G07B15/063—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems using wireless information transmission between the vehicle and a fixed station
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
- G08G1/0175—Detecting movement of traffic to be counted or controlled identifying vehicles by photographing vehicles, e.g. when violating traffic rules
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Business, Economics & Management (AREA)
- Finance (AREA)
- Traffic Control Systems (AREA)
- Devices For Checking Fares Or Tickets At Control Points (AREA)
Abstract
The invention provides a split RSU, which comprises an RSU control device and a license plate recognition camera, wherein the RSU control device and the license plate recognition camera are installed separately, the license plate recognition camera is positioned in front of the incoming direction of the RSU control device, the license plate recognition camera is connected with the RSU control device in a wireless or wired mode, the distance between the installation position of the license plate recognition camera and the installation position of the RSU control device is larger than or equal to 6m, the license plate recognition camera is a common license plate recognition camera, and license plate information recognized by the license plate recognition camera is transmitted to the RSU control device; the method can identify the license plate of the vehicle entering the lane in advance, reduce the requirement on the speed of license plate identification, ensure that the license plate identification rate is more than 99 percent, and have low production cost.
Description
Technical Field
The invention relates to an RSU, in particular to a split RSU with an RSU control device and a license plate recognition camera which are separately installed.
Background
ETC: (Electronic Toll Collection) Electronic Toll Collection (ETC) system is the most advanced way and bridge charging mode in the world at present, deducts the amount of money on a user card or carries out background settlement processing with a bank by using a computer networking technology through the special short-range microwave communication between a vehicle-mounted Electronic tag arranged on a vehicle windshield and a microwave antenna on an ETC lane of a Toll station, the ETC is an advanced electronic toll collection technology, is mainly applied to ramp entrances and exits and main line sign stations at present, is an ETC application mode under a closed highway toll scene, and is compelling to provide higher passing speed and higher passing efficiency along with the reform of the national highway supply side.
An OBU: the On board Unit is an abbreviation of an On board Unit, and the interpretation is that the microwave device communicates with an RSU (remote Short Range communication) by adopting a DSRC (dedicated Short Range communication) technology, in an ETC system, an OBU is placed On a vehicle, roadside-Road Side units (RSU-Road Side units) are erected On the roadside, the OBU and the RSU communicate with each other through microwaves when the vehicle passes through the RSU at a high speed.
RSU: the ETC system is installed On the roadside and is a device for realizing vehicle identity recognition and electronic toll collection by adopting DSRC (differentiated Short Range communication) technology and communicating with an On Board Unit (OBU).
Along with the popularization and application of ETC in the highway toll collection, the passing efficiency of the highway is greatly improved, but the application of ETC toll collection brings great trouble due to following interference and adjacent lane interference, the wave beam range of the RSU is difficult to accurately control, the sensitivity difference of the OBU (electronic tag) is large, the lane environment is complex, particularly, metal objects such as a lane canopy are serious in reflection of ETC microwave signals, and the adjacent lane interference and the following interference of the ETC are difficult to control under the multi-factor superposition.
The existing technology for solving the adjacent channel interference mainly comprises the following steps:
1. phased array (transmit) techniques: by switching and controlling the transmitting beam area of the RSU, the beam range is reduced to reduce the following interference. But only a part of following interference and adjacent lane interference can be improved under the influence of microwave reflection of a lane environment and the influence of sensitivity difference of the OBU.
2. OBU positioning technology: the OBU is positioned by receiving signals, an adjacent road and the OBU following a vehicle are filtered, but the OBU is influenced by the microwave reflection of a lane environment, particularly the reflection of metal objects such as a lane canopy and the like can cause the positioning accuracy to be poor or even fail.
3. A synchronizer is added between the parallel RSUs: the synchronous transmission of the microwave signals of the parallel lanes is realized by using the synchronizer, so that the signal-to-noise ratio of the signal transmitted by the lane is relatively maximum, the probability that an OBU (on-board unit) of the lane receives an RSU signal of an adjacent lane is reduced, the interference of the adjacent lane is still difficult to completely solve due to the reflection of the microwave in the lane environment, the parallel lanes are ensured to be all RSUs of the same manufacturer, otherwise, the synchronization cannot be carried out, and in addition, the method has small effect on the following interference.
4. RSU of embedded license plate discernment camera: license plate discernment camera and RSU formula as an organic whole, through license plate discernment camera discernment license plate come the filtration adjacent road and with car OBU, because license plate discernment camera and RSU formula as an organic whole install in the portal, be subject to the mounted position, can not be fine performance license plate discernment of performance license plate discernment camera license plate: (A) the license plate recognition rate is lower than 95% due to poor installation position and angle; (B) the lens of the license plate recognition camera is difficult to maintain, and the recognition rate is low after the lens is covered by dust; (C) because the license plate is required to be identified at the position with the distance of more than 10 meters from the RSU, the requirements on the identification distance and the identification speed of the license plate are very high, the existing license plate identification equipment is difficult to meet the requirements, the production cost is high, and the technology is immature.
In order to solve the technical problem, the application provides a split type RSU with an RSU control device and a license plate recognition camera which are separately installed.
Disclosure of Invention
Based on the defects of the prior art, the invention provides a split type RSU, which comprises an RSU control device and a license plate recognition camera, wherein the RSU control device and the license plate recognition camera are installed separately, the license plate recognition camera is positioned in front of the RSU control device in the coming direction, the license plate recognition camera is connected with the RSU control device in a wireless or wired mode, and the distance between the installation position of the license plate recognition camera and the installation position of the RSU control device is larger than or equal to 6 m.
As an improvement of the split RSU, the license plate recognition camera of the split RSU is a common license plate recognition camera, the license plate information of the lane recognized by the license plate recognition camera is transmitted to the RSU control device, and the RSU control device forms a license plate queue according to the sequence of the license plate information recognized by the license plate recognition camera.
As an improvement of the split RSU, the RSU control device of the split RSU reads license plate information in an OBU on a vehicle to be recognized, and the license plate information is matched with license plate information in a license plate queue recognized in advance through the license plate recognition camera in the RSU control device, the matching result comprises that the license plate information is completely the same or partially the same, and the license plate information is partially the same, namely the license plate information in the OBU on the vehicle to be recognized, read by the RSU control device, is the same as one license plate information in the license plate queue in three or more than three license plate information characters.
As an improvement of the split RSU, the license plate recognition cameras of the split RSU are arranged on one side or two sides of the lane entrance, and the installation position and the angle of the license plate recognition cameras on the lane are not limited by the installation position of the RSU control device.
As an improvement of the split RSU, the RSU control device of the split RSU is arranged above a lane or on a portal frame.
As an improvement of the split RSU, the distance between the installation position of the license plate recognition camera of the split RSU and the installation position of the RSU control device is larger than or equal to 6 m.
As an improvement of the split RSU, the split RSU further comprises a rotating device, the rotating device comprises a rotating driving motor, the rotating device is located on one side or two sides of the lane, and the rotating device is connected with the license plate recognition camera and drives the license plate recognition camera.
Compared with the prior art, the split RSU has the following beneficial effects: 1. because the license plate recognition cameras are arranged on one side or two sides of the lane entrance, on one hand, the accuracy of license plate recognition is improved, and on the other hand, the requirements on the imaging quality and the recognition speed of the cameras are reduced, so that the production cost is reduced; 2. because the license plate identification camera identifies the license plate entering the lane in advance and uploads the license plate information to the RSU control device, the RSU control device forms a license plate queue by the license plate information identified by the license plate identification camera according to the identification sequence, the RSU control device reads the license plate information from the OBU of the vehicle to be identified and matches the license plate information identified in advance by the license plate identification camera in the license plate queue, if the license plate information is not matched, the RSU control device can judge that the adjacent lane is interfered, the transaction is terminated, if the license plate information is matched, the RSU control device judges whether the license plate read from the OBU of the vehicle to be identified is the earliest existing license plate information identified in the license plate queue, if the license plate information is the existing license plate information, the ETC transaction is finished, the transacted license plate information is deleted from the license plate queue, otherwise, the vehicle is judged to be interfered with the vehicle, in conclusion, the split RSU can well solve the problems of adjacent lane interference and vehicle following interference of the ETC; 3. because the license plate recognition cameras are arranged on one side or two sides of the lane, the license plate recognition cameras and the RSU control device are not convenient to maintain unlike the prior art that the license plate recognition cameras and the RSU control device are both arranged on a portal frame, the license plate recognition cameras are convenient to maintain.
Drawings
Fig. 1 is a schematic installation diagram of the split RSU according to the preferred embodiment of the split RSU of the present invention.
Fig. 2 is a schematic structural diagram of the RSU control device and the license plate recognition camera according to the preferred embodiment of the split RSU of the present invention.
Fig. 3 is a flowchart of the operation of the split RSU according to the preferred embodiment of the split RSU of the present invention.
Detailed Description
The split RSU is mainly suitable for ETC non-stop charging.
Referring to fig. 1 and 2, the split RSU of the present invention will be described in detail.
As shown in fig. 1 and 2, a split RSU in this embodiment includes an RSU control device 1 and a license plate recognition camera 2, where the RSU control device 1 and the license plate recognition camera 2 are separately installed, and the license plate recognition camera 2 is located in front of an incoming direction of the RSU control device 1, so that a license plate of a vehicle entering a lane can be recognized in advance, the license plate recognition camera 2 is connected with the RSU control device 1 through a wireless or wired connection, a distance between an installation position of the license plate recognition camera 2 and an installation position of the RSU control device 1 is greater than or equal to 6m, an RSU embedded with the license plate recognition camera 2 in the prior art requires that a distance for recognizing a license plate is greater than 10 m, technical requirements are high, existing license plate recognition equipment is difficult to meet requirements, production cost is high, and license plate recognition accuracy for a vehicle is not high; the license plate recognition camera 2 of the split RSU of the invention requires the distance of recognizing the license plate to be more than 2 meters, the technology is mature, the cost is low, and the recognition success rate is high.
In this embodiment, the license plate recognition camera 2 of the split RSU of the present invention is a general license plate recognition camera 2, so that the requirement on the license plate recognition camera 2 is reduced, the license plate information of the own lane recognized by the license plate recognition camera 2 is transmitted to the RSU control device 1, and the RSU control device 1 forms a license plate queue according to the sequence of the license plate information recognized by the license plate recognition camera 2.
In this embodiment, the RSU control device 1 of the split RSU of the present invention reads license plate information in an OBU on a vehicle to be recognized, and matches the license plate information in the license plate queue that has been recognized in advance by the license plate recognition camera 2 in the RSU control device 1, where the matching result includes that the license plate information is completely the same or partially the same, and the license plate information is partially the same in that there are three or more license plate information characters in the license plate information in the OBU on the vehicle to be recognized that are read by the RSU control device 1 and one license plate information in the license plate queue.
In this embodiment, the license plate recognition camera 2 of the split RSU of the present invention is installed at one side of the entrance of the lane, and the installation position and angle of the license plate recognition camera 2 on the lane are not limited by the installation position of the RSU control device 1.
In other embodiments, the license plate recognition cameras 2 of the split RSU of the present invention are installed at both sides of the lane entrance, and the installation position and angle of the license plate recognition cameras 2 on the lane are not limited by the installation position of the RSU control device 1.
In the present embodiment, the RSU control apparatus 1 of the split RSU of the present invention is installed on a gantry.
In other embodiments, the RSU control apparatus 1 of the split RSU of the present invention is installed above the lane.
In this embodiment, the distance between the installation position of the license plate recognition camera 2 of the split RSU and the installation position of the RSU control device 1 is greater than or equal to 6 m.
In other embodiments, the split RSU further includes a rotating device 3, the rotating device 3 includes a rotating driving motor, the rotating device 3 is located on one side of the lane, and the rotating device 3 is connected to the license plate recognition camera 2 and drives the license plate recognition camera 2 to rotate.
In other embodiments, the split RSU further includes a rotating device 3, the rotating device 3 includes a rotating driving motor, the rotating device 3 is located on two sides of the lane, and the rotating device 3 is connected to the license plate recognition camera 2 and drives the license plate recognition camera 2 to rotate.
As shown in fig. 2, in this embodiment, the specific working process of the split RSU of the present invention is as follows: when a vehicle enters an ETC lane, the license plate recognition camera 2 is installed on one side of a lane entrance, the license plate recognition camera 2 firstly recognizes license plate information of the vehicle in the lane and sends the license plate information to the RSU control device 1, and the license plate recognition camera 2 only recognizes the license plate information of the lane, so that the problem of adjacent lane interference can be fundamentally solved; the RSU control device 1 puts the license plate information of the vehicle lane identified by the license plate identification camera 2 into a license plate queue according to the identification sequence, maintains the time validity of the license plates in the queue, deletes the license plate information from the queue when a certain license plate exceeds the valid time, the valid time of the license plate in the queue is generally set to be less than 60 seconds, and deletes the license plate information from the queue if the license plate information exceeds 60 seconds in the license plate queue; the RSU control device 1 is installed on a portal frame, and the RSU control device 1 reads license plate information in an OBU on a vehicle to be identified; if the license plate information of the OBU read by the RSU control device 1 is matched with the license plate information in the license plate queue, the license plate information of the OBU read by the RSU control device 1 can be determined to be the license plate information of the lane; the license plate information of the OBU read by the RSU control device 1 is the license plate information of the lane, if the license plate information of the OBU read by the RSU control device 1 is the license plate information of the lane vehicle which is identified by the license plate identification camera 2 at the earliest time in a license plate queue, ETC transaction is completed and the license plate information is deleted from the queue, if the license plate information of the OBU read by the RSU control device 1 is not the license plate information of the lane vehicle which is identified by the license plate identification camera 2 at the earliest time in the license plate queue, ETC car following interference can be determined, and ETC transaction is terminated; and if the license plate information of the OBU read by the RSU control device 1 is not matched with the license plate information in the license plate queue, determining that the OBU interferes with the vehicle in the adjacent lane of the ETC, and terminating the ETC transaction.
Compared with the prior art, the split RSU has the following beneficial effects: 1. because the license plate recognition cameras are arranged on one side or two sides of the lane entrance, on one hand, the accuracy of license plate recognition is improved, and on the other hand, the requirements on the imaging quality and the recognition speed of the cameras are reduced, so that the production cost is reduced; 2. because the license plate identification camera identifies the license plate entering the lane in advance and uploads the license plate information to the RSU control device, the RSU control device forms a license plate queue by the license plate information identified by the license plate identification camera according to the identification sequence, the RSU control device reads the license plate information from the OBU of the vehicle to be identified and matches the license plate information identified in advance by the license plate identification camera in the license plate queue, if the license plate information is not matched, the RSU control device can judge that the adjacent lane is interfered, the transaction is terminated, if the license plate information is matched, the RSU control device judges whether the license plate read from the OBU of the vehicle to be identified is the earliest existing license plate information identified in the license plate queue, if the license plate information is the existing license plate information, the ETC transaction is finished, the transacted license plate information is deleted from the license plate queue, otherwise, the vehicle is judged to be interfered with the vehicle, in conclusion, the split RSU can well solve the problems of adjacent lane interference and vehicle following interference of the ETC; 3. because the license plate recognition cameras are arranged on one side or two sides of the lane, the license plate recognition cameras and the RSU control device are not convenient to maintain unlike the prior art that the license plate recognition cameras and the RSU control device are arranged on a portal frame, the license plate recognition cameras are convenient to maintain.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (7)
1. A split RSU, comprising: the license plate recognition system comprises an RSU control device and a license plate recognition camera, wherein the RSU control device and the license plate recognition camera are installed separately, the license plate recognition camera is located in front of the incoming direction of the RSU control device, the license plate recognition camera is connected with the RSU control device in a wireless or wired mode, and the distance between the installation position of the license plate recognition camera and the installation position of the RSU control device is larger than or equal to 6 m.
2. The split RSU of claim 1, wherein: the license plate recognition camera is a common license plate recognition camera, the license plate information of the lane recognized by the license plate recognition camera is transmitted to the RSU control device, and the RSU control device forms a license plate queue according to the sequence of the license plate information recognized by the license plate recognition camera.
3. The split RSU of claim 2, wherein: the RSU control device reads license plate information of OBUs inside on the vehicle to be recognized, and with pass through in the RSU control device license plate recognition camera has discerned in advance the matching of license plate information in the license plate queue, the result of matching includes that license plate information is identical or partly the same, license plate information part is the same license plate information of OBUs inside on the vehicle to be recognized that RSU control device read with a license plate information in the license plate queue has the license plate information character more than three or three the same.
4. The split RSU of claim 3, wherein: the license plate recognition cameras are installed on one side or two sides of a lane entrance, and the installation position and the angle of the license plate recognition cameras on the lane are not limited by the installation position of the RSU control device.
5. The split RSU of claim 4, wherein: the RSU control device is arranged above the lane or on the portal frame.
6. The split RSU of claim 5, wherein: and the distance between the installation position of the license plate recognition camera and the installation position of the RSU control device is greater than or equal to 6 m.
7. The split RSU according to claim 1 or 6, wherein: the vehicle license plate recognition system is characterized by further comprising a rotating device, wherein the rotating device comprises a rotary driving motor, the rotating device is located on one side or two sides of the lane, and the rotating device is connected with the license plate recognition camera and drives the license plate recognition camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010933655.XA CN111915754A (en) | 2020-09-08 | 2020-09-08 | Split type RSU |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010933655.XA CN111915754A (en) | 2020-09-08 | 2020-09-08 | Split type RSU |
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| CN111915754A true CN111915754A (en) | 2020-11-10 |
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| CN202010933655.XA Pending CN111915754A (en) | 2020-09-08 | 2020-09-08 | Split type RSU |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114550324A (en) * | 2020-11-25 | 2022-05-27 | 北京万集科技股份有限公司 | Electronic toll collection method, system and storage medium |
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2020
- 2020-09-08 CN CN202010933655.XA patent/CN111915754A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114550324A (en) * | 2020-11-25 | 2022-05-27 | 北京万集科技股份有限公司 | Electronic toll collection method, system and storage medium |
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