CN114202817A - ETC radio environment monitoring guarantee method, system, equipment and medium - Google Patents
ETC radio environment monitoring guarantee method, system, equipment and medium Download PDFInfo
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- CN114202817A CN114202817A CN202111449572.4A CN202111449572A CN114202817A CN 114202817 A CN114202817 A CN 114202817A CN 202111449572 A CN202111449572 A CN 202111449572A CN 114202817 A CN114202817 A CN 114202817A
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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
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
Abstract
The invention provides an ETC radio environment monitoring and guaranteeing method, a system, equipment and a medium, wherein the method comprises the steps of capturing a vehicle image, acquiring ETC protocol information and an ETC frequency band signal when a real-time monitoring RSU device receives a link establishment request of a vehicle-mounted OBU device, respectively acquiring first vehicle information and second vehicle information according to the vehicle image and the RSU device, judging whether the first vehicle information and the second vehicle information are consistent, if not, acquiring vehicle position information and abnormal types to report an abnormal alarm, otherwise, acquiring an ETC transaction result to judge whether the transaction is successful or not when the RSU device and the vehicle-mounted OBU device are disconnected, detecting whether the RSU or the OBU has a fault according to the ETC protocol information if the transaction is unsuccessful, and reporting the abnormal alarm if the RSU or the OBU has the fault. The invention can effectively monitor whether signal interference, card carrying abnormality and equipment abnormality exist when the vehicle passes through the door frame, avoids label leakage and error labeling and provides reliable guarantee for normal operation of the toll collection system.
Description
Technical Field
The invention relates to the technical field of ETC monitoring, in particular to an ETC wireless environment monitoring and guaranteeing method, a system, computer equipment and a storage medium.
Background
The ETC technology realizes formal operation of a sectional type charging mode charging system and gradually realizes free flow passing of a highway. The operation quality of ETC charging, RSU antenna and vehicle-mounted OBU becomes the key factor of the operation quality of the highway toll collection system. Under the current situation of system operation, maintenance and management, the quality of the ETC antenna, the installation and debugging of equipment, the equipment operation environment, the equipment maintenance and other factors become key factors for guaranteeing the long-time normal operation of the ETC antenna, and the system operation and maintenance workload and the work difficulty of a highway operation unit are greatly increased compared with those before a station is removed. Through statistical analysis, the existing operation and maintenance system has the problems that ETC portal operation and maintenance staff have high requirements and large gaps, the timeliness of a mode of manually routing inspection and part monitoring is poor in information acquisition, the efficiency of manual intervention completion of equipment fault triggering and alarm processing is low, decision analysis basically depends on experience, equipment fault standards are different, and operation and maintenance departments are difficult to uniformly manage.
Present ETC transaction environmental equipment monitoring only relates to the single equipment monitoring data in the collection ETC transaction system, the unilateral application problem to solving single equipment, but actual ETC radio environment is very complicated, unusual scene is more, if only rely on single equipment monitoring analysis, rather than combining the real-time integrated analysis of multiple data information of a plurality of different equipment and carrying out comprehensive monitoring to ETC transaction environmental aspect, can not effectively discern signal interference, it is unusual to take the card, different unusual scenes such as RSU or OBU equipment are unusual, be difficult for avoiding the emergence of antenna mistake mark omission, also hardly provide effective reliable guarantee for charging system normal operating.
Therefore, it is urgently needed to provide an ETC radio environment monitoring and guaranteeing method capable of comprehensively monitoring the operation health condition of the system based on the real-time comprehensive analysis of various data information of a plurality of different devices, effectively identifying signal interference, carrying card abnormity, and different abnormal scenes such as RSU or OBU equipment abnormity, avoiding the occurrence of antenna error label leakage, improving the charging accuracy, providing convenience for equipment maintenance, and effectively ensuring the normal operation of an ETC charging system.
Disclosure of Invention
The invention aims to provide an ETC radio environment monitoring and guaranteeing method, which can accurately identify different abnormal scenes such as adjacent channel interference, trailing interference, card carrying abnormality, RSU or OBU equipment abnormality and the like by monitoring the communication state of RSU equipment and vehicle-mounted OBU equipment, ETC transaction protocol and ETC frequency band signals and combining a camera to acquire vehicle images for comprehensive analysis, and report abnormal alarms according to different abnormal scenes.
In order to achieve the above object, it is necessary to provide an ETC radio environment monitoring support method, system, computer device and storage medium for solving the above technical problems.
In a first aspect, an embodiment of the present invention provides an ETC radio environment monitoring and guaranteeing method, where the method includes:
monitoring whether the RSU equipment receives a link establishment request of the vehicle-mounted OBU equipment in real time, starting a camera to capture a vehicle image when the RSU equipment confirms that the link establishment request is received, and starting ETC monitoring equipment to acquire ETC protocol information and ETC frequency band signals; the RSU equipment, the camera and the ETC monitoring equipment are erected on the same portal frame;
acquiring first vehicle information according to the vehicle image, acquiring a communication vehicle-mounted OBU (on-board unit) equipment ID (identity) through the RSU equipment, and acquiring second vehicle information according to the communication vehicle-mounted OBU equipment ID; the first vehicle information comprises a real license plate number and a real vehicle type; the second vehicle information comprises a binding license plate number and a binding vehicle type corresponding to the ID of the communication vehicle-mounted OBU equipment;
judging whether the first vehicle information is consistent with the second vehicle information, if not, acquiring vehicle position information and an abnormal type, reporting a corresponding abnormal alarm according to the vehicle position information and the abnormal type, otherwise, monitoring whether the RSU equipment and the vehicle-mounted OBU equipment are in a broken link, and acquiring an ETC transaction result of the RSU equipment and the vehicle-mounted OBU equipment when the broken link occurs;
and judging whether the ETC transaction of the RSU equipment and the vehicle-mounted OBU equipment is successful or not according to the ETC transaction result, if not, detecting whether equipment faults exist in the RSU equipment and the vehicle-mounted OBU equipment or not according to the ETC protocol information, and if one of the RSU equipment and the vehicle-mounted OBU equipment has the equipment faults, reporting an abnormal alarm.
Further, the step of acquiring the first vehicle information according to the vehicle image includes:
performing OCR recognition on the vehicle image to obtain the real license plate number;
and obtaining the real vehicle model according to the vehicle image and the radar scanning equipment.
Further, the step of obtaining the real vehicle model according to the vehicle image and the radar scanning device includes:
extracting a vehicle trunk part according to the vehicle image, and acquiring an image two-dimensional coordinate of the vehicle trunk part;
converting the image two-dimensional coordinates into image three-dimensional coordinates, and scanning the vehicle by adopting a radar according to the image three-dimensional coordinates to obtain a corresponding vehicle profile;
and determining the real vehicle type according to the vehicle outline.
Further, the step of obtaining the communication vehicle-mounted OBU device ID through the RSU device and obtaining the second vehicle information according to the communication vehicle-mounted OBU device ID includes:
acquiring a corresponding communication vehicle-mounted OBU equipment ID according to the link establishment request;
and sending the ID of the communication vehicle-mounted OBU equipment to a remote server, and acquiring the bound license plate number and the bound vehicle type.
Further, the step of obtaining the vehicle position information and the abnormal type and reporting the corresponding abnormal alarm according to the vehicle position information and the abnormal type includes:
sending the real license plate number to a remote server, and acquiring a corresponding real vehicle-mounted OBU equipment ID;
respectively acquiring first position information, second position information and third position information corresponding to the real vehicle-mounted OBU equipment ID, the communication vehicle-mounted OBU equipment ID and the RSU equipment;
judging whether the first position information is consistent with the third position information, if not, judging that the abnormal type is abnormal with the card, otherwise, judging whether the first position information is consistent with the second position information;
if the first position information is consistent with the second position information, judging that the abnormal type is trailing interference abnormality, otherwise, judging that the abnormal type is adjacent channel interference abnormality;
taking the first position information, the second position information and the third position information as the vehicle position information;
and generating alarm information according to the vehicle position information, the abnormal type, the vehicle image, the ID of the communication vehicle-mounted OBU equipment, the first vehicle information and the second vehicle information, sending the alarm information to a monitoring terminal, and tracking the vehicle corresponding to the alarm information according to the vehicle position information.
Further, the step of detecting whether an equipment fault exists between the RSU device and the vehicle-mounted OBU device according to the ETC protocol information, and reporting an abnormal alarm if an equipment fault exists between one of the RSU device and the vehicle-mounted OBU device includes:
analyzing the ETC protocol information to obtain corresponding interactive data frame information;
judging whether ETC transaction of the RSU equipment and the vehicle-mounted OBU equipment is complete or not according to the interactive data frame information;
if the ETC transaction of the RSU equipment and the vehicle-mounted OBU equipment is incomplete, judging whether the downlink data missing number corresponding to the RSU equipment is the same as the uplink data missing number corresponding to the vehicle-mounted OBU equipment;
if the downlink data missing number is the same as the uplink data missing number, acquiring the ETC frequency band signal, detecting whether a signal interference source exists according to the ETC frequency band signal, and if not, judging whether the downlink data missing number is less than the uplink data missing number;
and if the number of the downlink data loss is less than the number of the uplink data loss, judging that the RSU equipment is abnormal and reporting an RSU equipment abnormality alarm, otherwise, judging that the vehicle-mounted OBU equipment is abnormal and reporting a vehicle-mounted OBU equipment abnormality alarm.
Further, the step of acquiring the ETC frequency band signal and detecting whether a signal interference source exists according to the ETC frequency band signal includes:
preprocessing the ETC frequency band signal by adopting a combined filter to obtain an ETC frequency band signal to be analyzed; the combined filter comprises mean filtering and band-pass filtering;
performing analog-to-digital conversion on the ETC frequency band signal to be analyzed to obtain an ETC frequency band digital signal;
calculating by adopting an FFT frequency domain algorithm according to the ETC frequency band digital signal to obtain corresponding signal intensity and signal frequency;
and judging whether the signal intensity is greater than a preset intensity threshold value, if so, judging that the signal interference source exists, acquiring positioning information of the signal interference source, and reporting an interference source abnormal alarm according to the positioning information, the signal intensity and the signal frequency.
In a second aspect, an embodiment of the present invention provides an ETC radio environment monitoring and safeguarding system, where the system includes:
the information acquisition module is used for monitoring whether the RSU equipment receives a link establishment request of the vehicle-mounted OBU equipment in real time, starting a camera to capture a vehicle image when the link establishment request is confirmed to be received, and starting the ETC monitoring equipment to acquire ETC protocol information and ETC frequency band signals; the RSU equipment, the camera and the ETC monitoring equipment are erected on the same portal frame;
the information processing module is used for acquiring first vehicle information according to the vehicle image, acquiring a communication vehicle-mounted OBU (on-board unit) equipment ID (identity) through the RSU equipment and acquiring second vehicle information according to the communication vehicle-mounted OBU equipment ID; the first vehicle information comprises a real license plate number and a real vehicle type; the second vehicle information comprises a binding license plate number and a binding vehicle type corresponding to the ID of the communication vehicle-mounted OBU equipment;
the first processing module is used for judging whether the first vehicle information is consistent with the second vehicle information, if not, acquiring vehicle position information and an abnormal type, reporting a corresponding abnormal alarm according to the vehicle position information and the abnormal type, otherwise, monitoring whether the RSU equipment and the vehicle-mounted OBU equipment are in a broken link, and acquiring an ETC transaction result of the RSU equipment and the vehicle-mounted OBU equipment when the broken link occurs;
and the second processing module is used for judging whether the ETC transaction of the RSU equipment and the vehicle-mounted OBU equipment is successful or not according to the ETC transaction result, detecting whether equipment faults exist in the RSU equipment and the vehicle-mounted OBU equipment or not according to the ETC protocol information if the ETC transaction result is unsuccessful, and reporting an abnormal alarm if one of the RSU equipment and the vehicle-mounted OBU equipment has the equipment faults.
In a third aspect, an embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method when executing the computer program.
In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of the above method.
The application provides an ETC radio environment monitoring guarantee method, a system, computer equipment and a storage medium, and by the method, whether the RSU equipment receives a link establishment request of vehicle-mounted OBU equipment or not is monitored in real time, when the link establishment request is confirmed to be received, a camera is started to capture a vehicle image, and ETC monitoring equipment is started to acquire ETC protocol information and ETC frequency band signals; acquiring first vehicle information according to the vehicle image, acquiring a communication vehicle-mounted OBU (on-board unit) equipment ID (identity) through the RSU equipment, and acquiring second vehicle information according to the communication vehicle-mounted OBU equipment ID; judging whether the first vehicle information is consistent with the second vehicle information, if not, acquiring vehicle position information and an abnormal type, reporting a corresponding abnormal alarm according to the vehicle position information and the abnormal type, otherwise, monitoring whether the RSU equipment and the vehicle-mounted OBU equipment are in a broken link, and acquiring an ETC transaction result of the RSU equipment and the vehicle-mounted OBU equipment when the broken link occurs; and judging whether the ETC transaction of the RSU equipment and the vehicle-mounted OBU equipment is successful or not according to the ETC transaction result, if not, detecting whether equipment faults exist in the RSU equipment and the vehicle-mounted OBU equipment or not according to the ETC protocol information, and if one of the RSU equipment and the vehicle-mounted OBU equipment has the equipment faults, reporting an abnormal alarm. Compared with the prior art, the communication state of the RSU equipment and the vehicle-mounted OBU equipment is actually monitored, the camera is combined to capture the vehicle image, the ETC monitoring equipment acquires ETC protocol information and ETC frequency band signals, various data information of different equipment is acquired to comprehensively monitor and comprehensively analyze the ETC transaction environment condition, different abnormal scenes such as signal interference, card carrying abnormality, RSU or OBU equipment abnormality and the like can be effectively identified, the occurrence of mistaken and leaked marks of an antenna is effectively avoided, the charging accuracy is improved, convenience is provided for maintaining the ETC equipment, and effective and reliable guarantee is further provided for normal operation of a charging system.
Drawings
FIG. 1 is a schematic flow chart of an ETC radio environment monitoring and safeguarding method in an embodiment of the invention;
fig. 2 is a schematic flow chart of interaction between an RSU device and an on-board OBU device via a DSRC protocol in an ETC radio environment according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an ETC radio environment monitoring and safeguarding system in an embodiment of the invention;
fig. 4 is an internal structural diagram of a computer device in the embodiment of the present invention.
Detailed Description
In order to make the purpose, technical solution and advantages of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments, and it is obvious that the embodiments described below are part of the embodiments of the present invention, and are used for illustrating the present invention only, but not for limiting the scope of the present invention. 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.
The invention provides an ETC radio environment monitoring and guaranteeing method which can be applied to the existing ETC charging supervisory system, only needs to install ETC monitoring equipment for acquiring ETC protocol information and ETC frequency band signals on each portal frame provided with a camera and RSU equipment on a highway, can realize the communication state of the RSU equipment and vehicle-mounted OBU equipment through actual monitoring, combines the camera to capture vehicle images, the ETC monitoring equipment acquires the ETC protocol information and the ETC frequency band signals, and carries out comprehensive monitoring and comprehensive analysis on the ETC transaction environment condition matched with each portal frame, so as to effectively identify different abnormal scenes such as signal interference, card carrying abnormality, RSU or OBU equipment abnormality and the like when a vehicle passes through each portal frame, avoid antenna false mark leakage and leakage of each ETC road section, improve the charging accuracy of each charging road section, and sense the health state of each ETC equipment in time, so as to provide corresponding maintenance and replacement in time, and further provide effective and reliable guarantee for the normal operation of the whole ETC charging system. The following embodiments will explain the ETC radio environment monitoring support method of the present invention in detail.
In one embodiment, as shown in fig. 1, there is provided an ETC radio environment monitoring and safeguarding method, including the following steps:
s11, monitoring whether the RSU equipment receives a link establishment request of the vehicle-mounted OBU equipment in real time, starting a camera to capture a vehicle image when the link establishment request is confirmed, and starting ETC monitoring equipment to acquire ETC protocol information and ETC frequency band signals; the RSU equipment, the camera and the ETC monitoring equipment are erected on the same portal frame;
the RSU device and the vehicle-mounted OBU device interact based on a DSRC protocol, the protocol exchange process is shown in fig. 2, and the link establishment request is a VST message of the vehicle-mounted OBU device responding to a BST message broadcasted by the RSU device. In an actual ETC charging system, frame control information is continuously broadcast by RSU equipment of a road side unit through a physical layer downlink, when vehicle-mounted OBU equipment enters an effective transmitting area and receives the information, corresponding VST request information is replied, the RSU equipment of the road side unit responds after receiving VST request link establishment information and then sends the VST request link establishment information to the vehicle-mounted OBU equipment, the vehicle-mounted OBU equipment confirms and sends the VST request link establishment information to the RSU equipment of the road side unit for information verification, after the verification is successful, communication connection between the RSU equipment and the road side unit is established, namely, the link establishment is successful, information interaction can be carried out by using the communication link, data exchange of corresponding application service types is completed, after data interaction required by the service types is completed, connection releasing information is sent to the vehicle-mounted OBU equipment through the RSU equipment of the road side unit, and the link is broken after the vehicle-mounted OBU equipment receives the information confirmation. This embodiment is based on current RSU equipment and the mutual flow of on-vehicle OBU equipment communication, with whether monitor on-vehicle OBU equipment response to the VST message of the BST message of RSU equipment broadcast as the basis of judging whether have the vehicle get into RSU induction zone and begin a new round of ETC interaction, start the camera at this moment and take a candid photograph and in time acquire effectual vehicle image, and open ETC monitoring facilities at this moment and gather ETC protocol information and ETC frequency channel signal, can not only acquire complete ETC protocol information and ETC frequency channel signal data, and can not acquire other redundant data, avoid increasing data processing's consumption, guarantee on the basis of data validity, improve data processing efficiency.
S12, acquiring first vehicle information according to the vehicle image, acquiring a communication vehicle-mounted OBU (on-board unit) device ID (identity) through the RSU device, and acquiring second vehicle information according to the communication vehicle-mounted OBU device ID; the first vehicle information comprises a real license plate number and a real vehicle type; the second vehicle information comprises a binding license plate number and a binding vehicle type corresponding to the ID of the communication vehicle-mounted OBU equipment;
the vehicle image is a two-dimensional image captured by a camera, and can also be an effective two-dimensional image extracted from a video stream acquired by continuously shooting for a certain time length based on the camera. As described above, in principle, when the RSU device receives a link establishment request from the on-board OBU device, and under the condition of checking adjacent lane interference, a vehicle entering the sensing area should already exist on a lane corresponding to the RSU device, and at this time, an image captured by starting the camera should include vehicle features, and the license plate number can be accurately extracted based on the vehicle image, so that the vehicle contour information can be effectively identified. Specifically, the step of acquiring first vehicle information according to the vehicle image includes:
performing OCR recognition on the vehicle image to obtain the real license plate number; the OCR recognition is a character recognition technology based on an image, and the specific method for acquiring the real license plate number may be: firstly, detecting by using an openCV (open vehicle classification) cascade classifier to obtain a rectangular region of the whole image where the license plate is located; secondly, secondarily confirming the left, right, upper and lower boundaries of the license plate based on the obtained rectangular region, judging whether the license plate is inclined, and if so, correcting; and thirdly, cutting license plate characters in the corrected region through a sliding window, and recognizing each character by using CNN neural network deep learning to obtain a recognition result meeting the confidence requirement, namely obtaining the real license plate number.
And obtaining the real vehicle model according to the vehicle image and the radar scanning equipment. The radar scanning equipment is not directly used for scanning the vehicle to obtain vehicle contour information, but is combined with coordinate information of a vehicle main body in a two-dimensional vehicle image obtained through snapshot to scan so as to quickly obtain accurate contour information of the vehicle, and then the efficiency and accuracy of vehicle identification are improved. Specifically, the method comprises the following steps:
extracting a vehicle trunk part according to the vehicle image, and acquiring an image two-dimensional coordinate of the vehicle trunk part; the vehicle trunk part can be effectively extracted based on the color, texture, spatial position and the like of the vehicle features in the vehicle image, and the specific extraction method of the vehicle trunk part is not limited herein. And after the vehicle trunk part is obtained, generating an image two-dimensional coordinate corresponding to the vehicle trunk part, so that the image two-dimensional coordinate can be conveniently used by a radar scanning device after coordinate conversion is carried out subsequently.
Converting the image two-dimensional coordinates into image three-dimensional coordinates, and scanning the vehicle by adopting a radar according to the image three-dimensional coordinates to obtain a corresponding vehicle profile; the radar can scan according to the set scanning parameters during scanning, so that the scanning efficiency and the accuracy of the obtained result are improved. In this embodiment, the two-dimensional coordinates of the image obtained based on the two-dimensional vehicle image are converted into three-dimensional coordinates of the image that can be used for radar scanning, and the scanning parameters of the radar scanning device are set accordingly.
And determining the real vehicle type according to the vehicle outline.
It should be noted that, in order to improve the accuracy of vehicle image processing, before obtaining the first vehicle information based on the vehicle image, it is necessary to identify whether the vehicle image has the vehicle feature (i.e., whether the vehicle is captured), and if not, the capturing is performed for a preset number of times within a preset time range to avoid an error in determining the abnormal scene. If the vehicle image with the vehicle characteristic is not acquired after the snapshot of the preset times is performed within the preset time range, it can be considered that the vehicle-mounted OBU device of the link establishment request received by the RSU device at this time may be a device on an adjacent lane vehicle, that is, there is an adjacent lane interference abnormality, an adjacent lane interference alarm needs to be reported, and the receiving sensitivity of the RSU device corresponding to the lane is adjusted to avoid the reception of the adjacent lane signal as much as possible, so that the possibility of false marking and wrong marking is avoided while the processing efficiency of the RSU device is improved.
Meanwhile, as described above, after the RSU device establishes a communication connection with the vehicle-mounted OBU device, data exchange may be alternately implemented according to an actual service type, that is, the ID of the vehicle-mounted OBU device that establishes a communication connection with the RSU device may be acquired by acquiring the ID of the vehicle-mounted OBU device in a command sending manner, and then the acquired ID of the communication vehicle-mounted OBU device may be sent to the remote server to acquire the second vehicle information matched with the ID of the communication vehicle-mounted OBU device. In principle, the first vehicle information acquired according to the vehicle image and the second vehicle information acquired according to the communication vehicle-mounted OBU device ID should be completely consistent, but abnormal phenomena such as vehicle-carried multi-card midway replacement fee evasion, adjacent channel signal interference error, vehicle trailing interference error, or interference source influence leakage may exist in an actual monitoring scene, so that the following method steps are adopted to accurately identify and divide different abnormal scenes which may exist on the basis of the first vehicle information and the second vehicle information in combination with the collected ETC protocol information and the ETC frequency band signal. It should be noted that, a database storing relevant information such as a maintenance license plate number, a vehicle type, a color, a vehicle owner, a vehicle-mounted OBU device ID and the like is stored in the remote server, and the ETC monitoring system can access, inquire and acquire relevant data information so as to process relevant services.
S13, judging whether the first vehicle information is consistent with the second vehicle information, if not, acquiring vehicle position information and an abnormal type, reporting a corresponding abnormal alarm according to the vehicle position information and the abnormal type, otherwise, monitoring whether the RSU equipment and the vehicle-mounted OBU equipment are in a broken link, and acquiring an ETC transaction result of the RSU equipment and the vehicle-mounted OBU equipment when the broken link occurs;
as described above, when the first vehicle information is inconsistent with the second vehicle information, the first vehicle information may correspond to different abnormal scenarios, the different abnormal scenarios correspond to different abnormal types, and the reported abnormal alarm is different, specifically, the step of obtaining the vehicle position information and the abnormal type and reporting the corresponding abnormal alarm according to the vehicle position information and the abnormal type includes:
sending the real license plate number to a remote server, and acquiring a corresponding real vehicle-mounted OBU equipment ID; it should be noted that, when the real license plate number is used to search the real on-board OBU device ID registered in the database on the remote server, there may be a case where matching information cannot be found, and then the vehicle should belong to a case where the ETC is not handled, and the OBU card carried on the vehicle should be an OBU card of another person or other vehicle of the person, and an abnormal alarm of abnormal card carrying needs to be performed, so that subsequent management and checking are facilitated.
Respectively acquiring first position information, second position information and third position information corresponding to the real vehicle-mounted OBU equipment ID, the communication vehicle-mounted OBU equipment ID and the RSU equipment;
judging whether the first position information is consistent with the third position information, if not, judging that the abnormal type is abnormal with the card, otherwise, judging whether the first position information is consistent with the second position information; the first position information is inconsistent with the third position information, namely the ID of the real vehicle-mounted OBU equipment of the vehicle is not used or is used in the lane position where other equipment which is not the RSU equipment is located, and at the moment, the abnormal type is determined to be abnormal with a card; when the first position information is consistent with the third position information, whether the first position information of the real vehicle-mounted OBU equipment ID is consistent with the second position information of the communication vehicle-mounted OBU equipment ID needs to be further judged so as to effectively distinguish the abnormal phenomena of adjacent channel signal interference, vehicle trailing interference, interference source influence and the like.
If the first position information is consistent with the second position information, judging that the abnormal type is trailing interference abnormality, otherwise, judging that the abnormal type is adjacent channel interference abnormality; if the first position information is consistent with the second position information, the fact that the real vehicle-mounted OBU equipment ID and the communication vehicle-mounted OBU equipment ID are in a lane induction area where the same RSU equipment is located is shown, and at the moment, a scene that front and rear vehicles follow interference is probably the most; meanwhile, if the first position information is inconsistent with the second position information, it is indicated that the ID of the real vehicle-mounted OBU device is in the sensing area of the lane where the corresponding RSU device is located, but the interference of the ID of the adjacent communication vehicle-mounted OBU device is caused, so that the missing mark of the ID of the real vehicle-mounted OBU device may occur, and the false mark of the ID of the adjacent communication vehicle-mounted OBU device may occur. The following interference and the adjacent channel interference both cause charging errors, and vehicle information and position information corresponding to the real vehicle-mounted OBU equipment ID and the communication vehicle-mounted OBU equipment ID need to be reported, so that the subsequent error mark correction is facilitated, and the charging accuracy is improved.
Taking the first position information, the second position information and the third position information as the vehicle position information;
and generating alarm information according to the vehicle position information, the abnormal type, the vehicle image, the ID of the communication vehicle-mounted OBU equipment, the first vehicle information and the second vehicle information, sending the alarm information to a monitoring terminal, and tracking the vehicle corresponding to the alarm information according to the vehicle position information.
The monitoring terminal can be a terminal device used by the existing ETC monitoring system, can also be an independent monitoring terminal, is not limited to a PC terminal or various mobile terminals, and can also be used for linking terminal devices of other supervision law enforcement departments, so that abnormal alarm can be timely processed conveniently, and vehicles needing supervision can be effectively tracked.
In order to ensure the comprehensiveness of monitoring, in this embodiment, after the first vehicle information and the second vehicle information are confirmed to be completely consistent, and when the RSU device and the on-board OBU device are disconnected, the following steps are adopted to further analyze whether the ETC transaction result is abnormal, and monitor the RSU device, the on-board OBU device and the signal interference source in combination with different abnormal conditions.
And S14, judging whether the ETC transaction of the RSU equipment and the vehicle-mounted OBU equipment is successful or not according to the ETC transaction result, if not, detecting whether equipment faults exist in the RSU equipment and the vehicle-mounted OBU equipment or not according to the ETC protocol information, and if one of the RSU equipment and the vehicle-mounted OBU equipment has the equipment faults, reporting an abnormal alarm.
The ETC transaction result is divided into two types of transaction success and transaction failure in principle, if the transaction is successful, the device function in the ETC charging system is effectively proved to be normal, the reason of the transaction failure needs to be analyzed according to the collected ETC protocol information, and whether the device failure or other signal interference source influence exists is determined. Specifically, the step of detecting whether an equipment fault exists between the RSU device and the vehicle-mounted OBU device according to the ETC protocol information, and if an equipment fault exists between one of the RSU device and the vehicle-mounted OBU device, reporting an abnormal alarm includes:
analyzing the ETC protocol information to obtain corresponding interactive data frame information; the ETC protocol information comprises all interactive information of the RSU equipment and the vehicle-mounted OBU equipment which are communicated by adopting a DSRC protocol. In principle, a completed transaction process should be that after the RSU device establishes a communication connection with the vehicle-mounted OBU device, the RSU device acquires relevant information of the vehicle-mounted OBU device in a command type message according to a service type requirement, the vehicle-mounted OBU device returns a corresponding response message, that is, the mutual information between the RSU device and the vehicle-mounted OBU device is symmetrical and equal in quantity, and finally the transaction process is confirmed to be finished by the broken link of the vehicle-mounted OBU device.
Judging whether ETC transaction of the RSU equipment and the vehicle-mounted OBU equipment is complete or not according to the interactive data frame information;
the interactive data frame information can be obtained by analyzing according to the corresponding DSRC protocol format, and is not described herein again. In this embodiment, whether the ETC transaction between the RSU device and the on-board OBU device is complete is determined according to whether the acquired interactive data frame information conforms to a complete communication flow.
If the ETC transaction of the RSU equipment and the vehicle-mounted OBU equipment is incomplete, judging whether the downlink data missing number corresponding to the RSU equipment is the same as the uplink data missing number corresponding to the vehicle-mounted OBU equipment;
the downlink data missing number and the uplink data missing number are determined by comparing the interactive data frame information obtained through actual analysis with interactive information which needs to be sent by the RSU equipment and the vehicle-mounted OBU equipment in a finished ETC transaction process. If the complete ETC transaction flow needs 8 pieces of interactive information, that is, the downlink data and the uplink data corresponding to the RSU device and the on-board OBU device are 4 pieces respectively, if any one of the downlink data and the uplink data in the frame information of the interactive data obtained by analysis is less than 4 pieces, the transaction is incomplete, and there may be situations that the downlink data is more missing than the uplink data, the downlink data is less missing than the uplink data, or the number of missing of the downlink data and the uplink data is the same in actual operation, and each situation may correspond to different abnormal scenes respectively.
If the downlink data missing number is the same as the uplink data missing number, acquiring the ETC frequency band signal, detecting whether a signal interference source exists according to the ETC frequency band signal, and if not, judging whether the downlink data missing number is less than the uplink data missing number; the number of the downlink data missing is the same as that of the uplink data missing, and the transaction is incomplete, so that communication between the RSU device and the vehicle-mounted OBU device is interrupted due to the existence of other signal interference sources, and further investigation needs to be performed by combining the acquired ETC frequency band signals. Specifically, the step of acquiring the ETC frequency band signal and detecting whether a signal interference source exists according to the ETC frequency band signal includes:
preprocessing the ETC frequency band signal by adopting a combined filter to obtain an ETC frequency band signal to be analyzed; the combined filter comprises mean filtering and band-pass filtering; wherein, there may be noise in the ETC frequency channel signal acquisition process, and before this embodiment uses the ETC frequency channel signal to carry out the analysis, need adopt mean value filtering and band-pass filtering in proper order to carry out smoothing and denoising processing.
Performing analog-to-digital conversion on the ETC frequency band signal to be analyzed to obtain an ETC frequency band digital signal;
calculating by adopting an FFT frequency domain algorithm according to the ETC frequency band digital signal to obtain corresponding signal intensity and signal frequency; the FFT frequency domain algorithm is used for converting a time domain signal corresponding to the ETC frequency band digital signal into a corresponding frequency domain signal through discrete Fourier transform, acquiring a plurality of frequency points based on sampling to obtain signal frequency response values on the corresponding frequency points, and obtaining signal power corresponding to each frequency point by adopting a signal power calculation formula to serve as the signal intensity of each frequency point for subsequent signal interference source judgment.
And judging whether the signal intensity is greater than a preset intensity threshold value, if so, judging that the signal interference source exists, acquiring positioning information of the signal interference source, and reporting an interference source abnormal alarm according to the positioning information, the signal intensity and the signal frequency. The preset intensity threshold value can be determined according to the intensity of signals transmitted by actual RSU equipment and vehicle-mounted OBU equipment, namely, the signal interference source can be simply and effectively identified by adopting the method, the signal interference source is identified, positioned and abnormally alarmed according to the signal intensity and the signal frequency, and the problem of transaction failure caused by signal interference can be effectively solved to a certain extent.
And if the number of the downlink data loss is less than the number of the uplink data loss, judging that the RSU equipment is abnormal and reporting an RSU equipment abnormality alarm, otherwise, judging that the vehicle-mounted OBU equipment is abnormal and reporting a vehicle-mounted OBU equipment abnormality alarm. The number of downlink data loss is less than that of uplink data loss, and the uplink data loss can be understood as abnormal disconnection of uplink equipment, so that the signal of the vehicle-mounted OBU equipment is considered to be unstable, and the vehicle-mounted OBU equipment needs to be subjected to alarm troubleshooting when a fault occurs; similarly, the uplink data missing number is less than the downlink data missing number, which can be understood as that the downlink device is disconnected abnormally first, and then the RSU device signal is considered to be unstable, and the RSU device needs to be subjected to alarm troubleshooting when a fault occurs, and specifically, whether the RSU device needs to be replaced or maintained is further diagnosed by technical means such as collecting the signal transmission frequency of the RSU device, so as to ensure that the subsequent ETC transaction is normal.
The embodiment of the application provides a communication state through actual monitoring RSU equipment and on-vehicle OBU equipment, combine the camera to take a candid photograph the vehicle image, ETC monitoring facilities gathers ETC agreement information and ETC frequency channel signal, acquire the multiple data information of different equipment and carry out comprehensive monitoring to ETC transaction environment situation, integrated analysis's ETC radio environment monitoring guarantee method, can not only quick effectual collection required information, and can be based on the data information of gathering to signal interference, trailing interference, adjacent lane interference, it is unusual to take the card, different unusual scenes such as RSU or OBU equipment anomaly carry out effective discernment, effectively avoid antenna mistake mark-leaking emergence, when improving the charging accuracy, still facilitate for ETC equipment maintenance, and then provide effective and reliable guarantee for charging system normal operating.
It should be noted that, although the steps in the above-described flowcharts are shown in sequence as indicated by arrows, the steps are not necessarily executed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise.
In one embodiment, as shown in fig. 3, there is provided an ETC radio environmental monitoring and safeguarding system, the system including:
the system comprises an information acquisition module 1, a link establishment module and a link failure detection module, wherein the information acquisition module is used for monitoring whether the RSU equipment receives a link establishment request of the vehicle-mounted OBU equipment in real time, starting a camera to capture a vehicle image when the link establishment request is confirmed to be received, and starting ETC monitoring equipment to acquire ETC protocol information and ETC frequency band signals; the RSU equipment, the camera and the ETC monitoring equipment are erected on the same portal frame;
the information processing module 2 is configured to acquire first vehicle information according to the vehicle image, acquire a communication vehicle-mounted OBU device ID through the RSU device, and acquire second vehicle information according to the communication vehicle-mounted OBU device ID; the first vehicle information comprises a real license plate number and a real vehicle type; the second vehicle information comprises a binding license plate number and a binding vehicle type corresponding to the ID of the communication vehicle-mounted OBU equipment;
the first processing module 3 is configured to determine whether the first vehicle information is consistent with the second vehicle information, if not, obtain vehicle position information and an abnormal type, and report a corresponding abnormal alarm according to the vehicle position information and the abnormal type, otherwise, monitor whether the RSU device and the vehicle-mounted OBU device are disconnected, and obtain an ETC transaction result of the RSU device and the vehicle-mounted OBU device when the RSU device and the vehicle-mounted OBU device are disconnected;
and the second processing module 4 is configured to determine whether the ETC transaction of the RSU device and the vehicle-mounted OBU device is successful according to the ETC transaction result, detect whether an equipment fault exists between the RSU device and the vehicle-mounted OBU device according to the ETC protocol information if the ETC transaction is unsuccessful, and report an abnormal alarm if one of the RSU device and the vehicle-mounted OBU device has an equipment fault.
It should be noted that, for specific limitations of the ETC radio environment monitoring and safeguarding system, reference may be made to the above limitations of the ETC radio environment monitoring and safeguarding method, which is not described herein again. All or part of each module in the ETC radio environment monitoring and guaranteeing system can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
Fig. 4 shows an internal structure diagram of a computer device in one embodiment, and the computer device may be specifically a terminal or a server. As shown in fig. 4, the computer apparatus includes a processor, a memory, a network interface, a display, and an input device, which are connected through a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to realize an ETC radio environment monitoring safeguard method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those of ordinary skill in the art that the architecture shown in FIG. 4 is only a block diagram of some of the structures associated with the present solution and is not intended to limit the computing devices to which the present solution may be applied, and that a particular computing device may include more or less components than those shown in the drawings, or may combine certain components, or have the same arrangement of components.
In one embodiment, a computer device is provided, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the steps of the above method being performed when the computer program is executed by the processor.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the above-mentioned method.
To sum up, the ETC radio environment monitoring safeguard method, the system, the computer device and the storage medium provided by the embodiments of the present invention realize that whether the real-time monitoring RSU device receives a link establishment request of the on-board OBU device, and when the link establishment request is confirmed to be received, start the camera to capture a vehicle image, and start the ETC monitoring device to acquire ETC protocol information and an ETC frequency band signal; acquiring first vehicle information according to the vehicle image, acquiring a communication vehicle-mounted OBU (on-board unit) equipment ID (identity) through the RSU equipment, and acquiring second vehicle information according to the communication vehicle-mounted OBU equipment ID; judging whether the first vehicle information is consistent with the second vehicle information, if not, acquiring vehicle position information and an abnormal type, reporting a corresponding abnormal alarm according to the vehicle position information and the abnormal type, otherwise, monitoring whether the RSU equipment and the vehicle-mounted OBU equipment are in a broken link, and acquiring an ETC transaction result of the RSU equipment and the vehicle-mounted OBU equipment when the broken link occurs; according to the ETC transaction result, whether ETC transaction of the RSU equipment and the vehicle-mounted OBU equipment is successful or not is judged, if not, whether equipment faults exist in the RSU equipment and the vehicle-mounted OBU equipment or not is detected according to the ETC protocol information, if one of the RSU equipment and the vehicle-mounted OBU equipment has the equipment faults, an abnormal alarm is reported, through the technical scheme that the communication state of the RSU equipment and the vehicle-mounted OBU equipment is actually monitored, vehicle images are captured by combining a camera, the ETC monitoring equipment acquires ETC protocol information and ETC frequency band signals, various data information of different equipment are obtained, the ETC transaction environment condition is comprehensively monitored and comprehensively analyzed, required information can be rapidly and effectively collected, and different abnormal scenes such as signal interference, trailing interference, adjacent channel interference, card carrying abnormality, RSU equipment abnormality or OBU equipment abnormality can be effectively identified based on the collected data information, effectively avoid antenna mistake mark to miss the emergence of mark, when improving the charging accuracy, still facilitate for ETC equipment maintenance, and then provide effective and reliable guarantee for charging system normal operating.
The embodiments in this specification are described in a progressive manner, and all the same or similar parts of the embodiments are directly referred to each other, and each embodiment is described with emphasis on differences from other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment. It should be noted that, the technical features of the embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express some preferred embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these should be construed as the protection scope of the present application. Therefore, the protection scope of the present patent shall be subject to the protection scope of the claims.
Claims (10)
1. An ETC radio environment monitoring and guaranteeing method is characterized by comprising the following steps:
monitoring whether the RSU equipment receives a link establishment request of the vehicle-mounted OBU equipment in real time, starting a camera to capture a vehicle image when the RSU equipment confirms that the link establishment request is received, and starting ETC monitoring equipment to acquire ETC protocol information and ETC frequency band signals; the RSU equipment, the camera and the ETC monitoring equipment are erected on the same portal frame;
acquiring first vehicle information according to the vehicle image, acquiring a communication vehicle-mounted OBU (on-board unit) equipment ID (identity) through the RSU equipment, and acquiring second vehicle information according to the communication vehicle-mounted OBU equipment ID; the first vehicle information comprises a real license plate number and a real vehicle type; the second vehicle information comprises a binding license plate number and a binding vehicle type corresponding to the ID of the communication vehicle-mounted OBU equipment;
judging whether the first vehicle information is consistent with the second vehicle information, if not, acquiring vehicle position information and an abnormal type, reporting a corresponding abnormal alarm according to the vehicle position information and the abnormal type, otherwise, monitoring whether the RSU equipment and the vehicle-mounted OBU equipment are in a broken link, and acquiring an ETC transaction result of the RSU equipment and the vehicle-mounted OBU equipment when the broken link occurs;
and judging whether the ETC transaction of the RSU equipment and the vehicle-mounted OBU equipment is successful or not according to the ETC transaction result, if not, detecting whether equipment faults exist in the RSU equipment and the vehicle-mounted OBU equipment or not according to the ETC protocol information, and if one of the RSU equipment and the vehicle-mounted OBU equipment has the equipment faults, reporting an abnormal alarm.
2. The ETC radio environment monitoring and safeguarding method according to claim 1, wherein the step of acquiring first vehicle information from the vehicle image comprises:
performing OCR recognition on the vehicle image to obtain the real license plate number;
and obtaining the real vehicle model according to the vehicle image and the radar scanning equipment.
3. The ETC radio environment monitoring safeguard method according to claim 2, characterized in that the step of obtaining the real vehicle model from the vehicle image and the radar scanning device comprises:
extracting a vehicle trunk part according to the vehicle image, and acquiring an image two-dimensional coordinate of the vehicle trunk part;
converting the image two-dimensional coordinates into image three-dimensional coordinates, and scanning the vehicle by adopting a radar according to the image three-dimensional coordinates to obtain a corresponding vehicle profile;
and determining the real vehicle type according to the vehicle outline.
4. The ETC radio environment monitoring and safeguarding method according to claim 1, wherein the steps of obtaining a communication vehicle-mounted OBU device ID by the RSU device, and obtaining second vehicle information based on the communication vehicle-mounted OBU device ID include:
acquiring a corresponding communication vehicle-mounted OBU equipment ID according to the link establishment request;
and sending the ID of the communication vehicle-mounted OBU equipment to a remote server, and acquiring the bound license plate number and the bound vehicle type.
5. The ETC radio environment monitoring and safeguarding method according to claim 1, wherein the step of obtaining vehicle location information and an anomaly type and reporting a corresponding anomaly alarm according to the vehicle location information and the anomaly type comprises:
sending the real license plate number to a remote server, and acquiring a corresponding real vehicle-mounted OBU equipment ID;
respectively acquiring first position information, second position information and third position information corresponding to the real vehicle-mounted OBU equipment ID, the communication vehicle-mounted OBU equipment ID and the RSU equipment;
judging whether the first position information is consistent with the third position information, if not, judging that the abnormal type is abnormal with the card, otherwise, judging whether the first position information is consistent with the second position information;
if the first position information is consistent with the second position information, judging that the abnormal type is trailing interference abnormality, otherwise, judging that the abnormal type is adjacent channel interference abnormality;
taking the first position information, the second position information and the third position information as the vehicle position information;
and generating alarm information according to the vehicle position information, the abnormal type, the vehicle image, the ID of the communication vehicle-mounted OBU equipment, the first vehicle information and the second vehicle information, sending the alarm information to a monitoring terminal, and tracking the vehicle corresponding to the alarm information according to the vehicle position information.
6. The ETC radio environment monitoring and safeguarding method according to claim 1, wherein the step of detecting whether there is an equipment fault in the RSU device and the on-board OBU device according to the ETC protocol information, and reporting an abnormal alarm if there is an equipment fault in one of the RSU device and the on-board OBU device comprises:
analyzing the ETC protocol information to obtain corresponding interactive data frame information;
judging whether ETC transaction of the RSU equipment and the vehicle-mounted OBU equipment is complete or not according to the interactive data frame information;
if the ETC transaction of the RSU equipment and the vehicle-mounted OBU equipment is incomplete, judging whether the downlink data missing number corresponding to the RSU equipment is the same as the uplink data missing number corresponding to the vehicle-mounted OBU equipment;
if the downlink data missing number is the same as the uplink data missing number, acquiring the ETC frequency band signal, detecting whether a signal interference source exists according to the ETC frequency band signal, and if not, judging whether the downlink data missing number is less than the uplink data missing number;
and if the number of the downlink data loss is less than the number of the uplink data loss, judging that the RSU equipment is abnormal and reporting an RSU equipment abnormality alarm, otherwise, judging that the vehicle-mounted OBU equipment is abnormal and reporting a vehicle-mounted OBU equipment abnormality alarm.
7. The ETC radio environment monitoring and safeguarding method according to claim 6, wherein the step of acquiring the ETC frequency band signal and detecting whether a signal interference source exists according to the ETC frequency band signal comprises:
preprocessing the ETC frequency band signal by adopting a combined filter to obtain an ETC frequency band signal to be analyzed; the combined filter comprises mean filtering and band-pass filtering;
performing analog-to-digital conversion on the ETC frequency band signal to be analyzed to obtain an ETC frequency band digital signal;
calculating by adopting an FFT frequency domain algorithm according to the ETC frequency band digital signal to obtain corresponding signal intensity and signal frequency;
and judging whether the signal intensity is greater than a preset intensity threshold value, if so, judging that the signal interference source exists, acquiring positioning information of the signal interference source, and reporting an interference source abnormal alarm according to the positioning information, the signal intensity and the signal frequency.
8. An ETC radio environmental monitoring safeguard system, characterized in that, the system includes:
the information acquisition module is used for monitoring whether the RSU equipment receives a link establishment request of the vehicle-mounted OBU equipment in real time, starting a camera to capture a vehicle image when the link establishment request is confirmed to be received, and starting the ETC monitoring equipment to acquire ETC protocol information and ETC frequency band signals; the RSU equipment, the camera and the ETC monitoring equipment are erected on the same portal frame;
the information processing module is used for acquiring first vehicle information according to the vehicle image, acquiring a communication vehicle-mounted OBU (on-board unit) equipment ID (identity) through the RSU equipment and acquiring second vehicle information according to the communication vehicle-mounted OBU equipment ID; the first vehicle information comprises a real license plate number and a real vehicle type; the second vehicle information comprises a binding license plate number and a binding vehicle type corresponding to the ID of the communication vehicle-mounted OBU equipment;
the first processing module is used for judging whether the first vehicle information is consistent with the second vehicle information, if not, acquiring vehicle position information and an abnormal type, reporting a corresponding abnormal alarm according to the vehicle position information and the abnormal type, otherwise, monitoring whether the RSU equipment and the vehicle-mounted OBU equipment are in a broken link, and acquiring an ETC transaction result of the RSU equipment and the vehicle-mounted OBU equipment when the broken link occurs;
and the second processing module is used for judging whether the ETC transaction of the RSU equipment and the vehicle-mounted OBU equipment is successful or not according to the ETC transaction result, detecting whether equipment faults exist in the RSU equipment and the vehicle-mounted OBU equipment or not according to the ETC protocol information if the ETC transaction result is unsuccessful, and reporting an abnormal alarm if one of the RSU equipment and the vehicle-mounted OBU equipment has the equipment faults.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method of any of claims 1 to 7 are implemented when the computer program is executed by the processor.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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