CN113472605A - On-vehicle ETC agreement monitoring device of highway - Google Patents
On-vehicle ETC agreement monitoring device of highway Download PDFInfo
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- CN113472605A CN113472605A CN202110620922.2A CN202110620922A CN113472605A CN 113472605 A CN113472605 A CN 113472605A CN 202110620922 A CN202110620922 A CN 202110620922A CN 113472605 A CN113472605 A CN 113472605A
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 24
- 238000012544 monitoring process Methods 0.000 claims abstract description 78
- 230000006854 communication Effects 0.000 claims abstract description 13
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- 238000004458 analytical method Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 20
- 238000012545 processing Methods 0.000 claims description 7
- 238000013507 mapping Methods 0.000 claims description 4
- 238000009432 framing Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 4
- 210000004258 portal system Anatomy 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 206010039203 Road traffic accident Diseases 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/18—Protocol analysers
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W24/08—Testing, supervising or monitoring using real traffic
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Abstract
The invention discloses a highway vehicle-mounted ETC protocol monitoring device, which comprises: go up OBU and monitor antenna, down RSU and monitor antenna, 4G antenna, go up OBU and monitor variable attenuator, down RSU's variable attenuator, radio frequency cable, go up ETC agreement analytic circuit, down ETC agreement analytic circuit, master control circuit, power supply circuit, 4G radio frequency connecting wire, fast encoder of wheel, ETC agreement monitoring module. The invention can realize real-time monitoring of ETC communication process data of a toll station and a portal system on a highway without stopping or closing the highway under a normal traffic environment, analyzes key indexes and parameters such as air transaction time, frame communication time, frame data, transaction positions and the like, further analyzes and evaluates the monitored data, realizes problem positioning of ETC transaction failure conditions possibly caused by bugs or defects of RSU hardware, driveways and portal software and the like, and provides technical basis and solution for stable operation and scientific management and maintenance of ETC.
Description
Technical Field
The invention belongs to the technical field of ETC, and particularly relates to a vehicle-mounted ETC protocol monitoring device for a highway.
Background
With the implementation of the national cancellation of provincial toll station traffic strategy, the highway in China basically realizes the full coverage of ETC lanes, and the charging mode basically completes the transition from the original closed charging to the segmented free flow charging. In the face of ETC lanes of toll stations and portal systems in quantity of road networks in China, the quality of ETC performance directly influences the stable operation of the toll systems, and therefore comprehensive and comprehensive tests on ETC design parameters, indexes, performance and other contents are needed to ensure the accuracy and effectiveness of the operation of the ETC systems.
As a key technical content, the communication process between the RSU and the OBU in the ETC transaction does not have an effective technical means for determining whether the indexes and data thereof meet the corresponding standards and specifications, such as "short-range communication dedicated to electronic toll collection" (GB/T20851-2007); in addition, the portal system is installed on the expressway, the traffic flow and the vehicle speed are too fast, the traffic accidents are easily caused by detection personnel if field test work is carried out, huge potential safety hazards exist, or the road sealing treatment is carried out in each test, the detection efficiency is low, the process is long in time consumption, and the normal passing of the expressway is seriously influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a highway vehicle-mounted ETC protocol monitoring device, which is arranged on a general vehicle or a professional vehicle, is used for finishing the acquisition and monitoring of communication data between an OBU (vehicular electronic toll collection) and an OBU (vehicular toll collection) by monitoring radio frequency air signals between the OBU and the RSU in the transaction process through a toll station or a portal system, is used for finishing the analysis and analysis of the data through corresponding software, is used for finishing the ETC protocol test under the working conditions of no parking, no road sealing and normal vehicle speed, finishing the normal operation of the RSU, lane and portal software, defect positioning and the like, and provides a technical basis and a solution for the stable operation and scientific management of ETC.
The technical scheme is as follows:
the utility model provides an on-vehicle ETC agreement monitoring devices of highway, includes: go upward OBU and monitor antenna, down RSU and monitor antenna, 4G antenna, go upward OBU and monitor variable attenuator, down RSU's variable attenuator, radio frequency cable, go upward ETC agreement analysis circuit, down ETC agreement analysis circuit, master control circuit, power supply circuit, 4G radio frequency connecting line, fast encoder of wheel, ETC agreement monitoring module, wherein:
the uplink OBU monitoring antenna is connected with a radio frequency interface of the uplink ETC protocol analysis circuit through a radio frequency connecting line and an uplink OBU monitoring variable attenuator; the downlink RSU monitoring antenna is connected with a radio frequency interface of the downlink ETC protocol analysis circuit through a radio frequency connecting line and a downlink RSU monitoring variable attenuator; the uplink ETC protocol analysis circuit is connected with the main control circuit through a high-speed interface and sends monitored ETC uplink transaction data to an embedded program in the main control circuit for data processing; the downlink ETC protocol analysis circuit is connected with the main control circuit through a high-speed interface and sends the monitored downlink ETC transaction data to an embedded program in the main control circuit for data processing; the ETC protocol monitoring module is communicated with an embedded program in a main control circuit, transaction air source code data of a vehicle-mounted unit and an RSU in the ETC transaction process are obtained, identification of an ETC transaction data frame is completed, position information of a current vehicle relative to the RSU is obtained through a wheel speed encoder in the monitoring process, the ETC protocol monitoring module forms a mapping relation between the ETC transaction data frame and the position according to the time of the monitoring process, and finally ETC transaction information frame data, ETC air transaction time, frame communication time, a transaction occurrence point position, a transaction completion point position, a transaction area, a lane type, vehicle-mounted unit type index parameters and data information and places where transaction problems possibly occur are obtained according to the mapping relation.
Furthermore, the uplink OBU monitoring antenna is a directional antenna with stable gain at a carrier frequency of 5.79GHz-5.80GHz, meets the technical requirement of a standard GBT 20851.1 uplink, is arranged in an effective distance from an in-vehicle electronic tag, is adjusted to proper gain by controlling the uplink OBU monitoring variable attenuator, and only receives radio frequency signals transmitted by the in-vehicle electronic tag and does not receive signals of other vehicle electronic tags; the downlink RSU monitoring antenna is a directional antenna with stable gain under a carrier frequency of 5.83GHz-5.84GHz, meets the technical requirement of a standard GBT 20851.1 downlink, the width of a half-power lobe of the antenna is smaller than 30 degrees in the vertical direction and the horizontal plane angle, the adjustment gain range of the variable attenuator is monitored by controlling the downlink RSU, only the radio frequency signals of the RSU in a lane or a lane range are received, and the radio frequency signals of the RSU in a reverse lane are prevented from being received.
Furthermore, the 4G antenna is a carrier frequency antenna between 430MHz and 2700MHz, has stable positive gain, and is used for sending the data source code monitored by the vehicle-mounted ETC protocol analyzed by the embedded program to the remote ETC protocol monitoring host.
Furthermore, the uplink OBU monitoring variable attenuator is a radio frequency attenuator capable of adjusting the gain of an uplink OBU monitoring radio frequency link within a range of 6GHz, and the uplink OBU monitoring antenna can only receive radio frequency signals transmitted by the vehicle-mounted electronic tag and does not receive signals of other vehicle electronic tags by adjusting the attenuation gain; the downlink RSU variable attenuator is a radio frequency attenuator capable of adjusting the gain of a downlink RSU monitoring radio frequency link within a 6GHz range, and the downlink RSU monitoring antenna can only receive the radio frequency signals of the lane or the RSU within the lane range by adjusting the attenuation gain, so that the radio frequency signals of the RSU in the reverse lane are prevented from being received.
Furthermore, the uplink ETC protocol analysis circuit is used for receiving the signals transmitted by the uplink OBU, further analyzing the signals into ETC data source codes and sending the ETC data source codes to the master control circuit; the downlink ETC protocol analysis circuit is used for receiving the signals transmitted by the downlink RSU, further analyzing the signals into ETC data source codes and sending the ETC data source codes to the master control circuit.
Furthermore, the master control circuit is an integrated circuit based on a mainstream embedded chip, receives ETC transaction source codes sent by the downlink and uplink ETC protocol analysis circuits in real time, completes source code analysis through data processing, frames data and sends the data to the ETC protocol monitoring module.
Furthermore, the wheel speed encoder is a rotary incremental high-precision sensor, is arranged on a vehicle to collect the rotating angle of the vehicle wheel, and calculates the vehicle speed and the running distance of the wheel according to the radius and the time of the wheel, so that the vehicle-mounted ETC protocol monitoring device on the highway is matched with the monitoring data and the position data of the monitoring process.
Preferably, further multiplicable big dipper GPS module for this device increases geographical position information, the information management of ETC detected data of being convenient for.
The ETC protocol monitoring host and software of the highway vehicle-mounted ETC protocol monitoring device are a control brain and a data center of the whole device, on one hand, ETC transaction data sent by a main control circuit are received in real time, and on the other hand, current speed measurement acquired by a wheel speed encoder is read and converted into vehicle position information and stored in a database; meanwhile, the software analyzes data, frames and time of a single transaction process in real time according to the received ETC transaction data, calculates and analyzes according to corresponding receiving time and content, acquires ETC transaction key information such as air transaction time, frame communication time, frame data, access information, license plate number and the like, and stores the ETC transaction key information into a database and corresponding visual display; on the other hand, the ETC protocol monitoring device can be correspondingly set with parameters, such as BST filtering rules, receiving sensitivity adjustment, system parameter setting and the like.
The vehicle of the highway vehicle-mounted ETC protocol monitoring device can be a professional detection vehicle, or a common vehicle, or a mobile device which can have a mobile function generally, provides an installation carrier for the hardware equipment, and can install, fix and bear the various instrument equipment on the vehicle.
The invention can realize the protocol monitoring of the ETC transaction process under the working conditions of no parking and no road sealing, thereby effectively reducing the potential safety hazard in the detection process; the whole detection process is not limited by the detection speed, the single detection time can be reduced to the second level, and the detection efficiency is efficient and rapid; possible defects and loopholes of software and hardware of the ETC system can be further analyzed according to the monitoring data.
Drawings
Fig. 1 is a schematic diagram of a principle framework of a vehicle-mounted ETC protocol monitoring device for an expressway, according to the present invention.
Fig. 2 is a schematic structural connection diagram of a vehicle-mounted ETC protocol monitoring device on a highway according to the present invention.
Fig. 3 is a schematic diagram of a detection process of the vehicle-mounted ETC protocol monitoring device for the expressway according to the present invention.
Fig. 4 is a schematic flow chart of an identification method of an ETC transaction process of a vehicle-mounted ETC protocol monitoring device on a highway according to the invention.
The reference symbols in the above figures have the following meanings:
1-an uplink OBU monitoring antenna; 2-downlink RSU monitoring antenna; a 3-4G antenna; 4-monitoring the variable attenuator by the uplink OBU; 5-variable attenuator of downstream RSU; 6-radio frequency cable; 7-an uplink ETC protocol analysis circuit; 8-downlink ETC protocol analysis circuit; 9-a master control circuit; 10-a power supply circuit; 11-device housing; 12-an external cable; 13-a power line; 14-mesh wire; 15-4G radio frequency connecting lines; 16-an on-board unit; 17-RSU; 18-a vehicle; 19-wheel speed encoder.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following describes in detail a highway on-board ETC protocol monitoring device provided by the present invention with reference to an embodiment. The following examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
Fig. 1 and 2 are schematic diagrams of the principle, the overall structure and the hardware connection of the present invention. The on-vehicle ETC agreement monitoring devices of highway is by going upward OBU monitoring antenna 1, down RSU monitoring antenna 2, 4G antenna 3, go upward OBU monitoring variable attenuator 4, down RSU's variable attenuator 5, radio frequency cable 6, go upward ETC agreement analysis circuit 7, down ETC agreement analysis electricity 8, master control circuit 9, power supply circuit 10, device shell 11, outside cable 12, power cord 13, net twine 14, 4G radio frequency connecting wire 15 and constitute.
The uplink OBU monitoring antenna 1 is connected with a radio frequency interface of an uplink ETC protocol analysis circuit 7 through a radio frequency cable 6 via an uplink OBU monitoring variable attenuator 4 to form an uplink OBU monitoring radio frequency link for monitoring transaction information transmitted to an RSU by an electronic tag (OBU and CPC); the downlink RSU monitoring antenna 2 is connected with a radio frequency interface of a downlink ETC protocol analysis circuit 8 through a radio frequency cable 6 and a downlink RSU monitoring variable attenuator 5 to form a downlink RSU monitoring radio frequency link for monitoring the transaction information transmitted by the RSU to the electronic tags (OBU and CPC); the uplink ETC protocol analysis circuit 7 and the downlink ETC protocol analysis circuit 8 are used for finishing real-time monitoring and data conversion from radio frequency signals to digital signals, are connected with the main control circuit 9 through a network port, a USB and other high-speed interfaces, transmit monitored transaction source data to an embedded program in the main control circuit 9 for data processing, analyze source codes, perform data framing according to certain rules, transmit the data to ETC protocol monitoring software through the network port, a mobile network, a USB and other interfaces, and simultaneously transmit reminding information entering an ETC transaction area through the acousto-optic-electric forms of a buzzer, indicator light flashing, information transmission and the like.
The invention relates to an implementation method of a rapid detection system for ETC performance of an expressway, which comprises the following steps: as shown in fig. 3, when a user drives the inspection vehicle 18 to travel in a lane of the detected ETC system, the uplink OBU monitoring antenna 1 is adhered or adjacently mounted on the vehicle-mounted unit 16(OBU or CPC card), so that the antenna main lobe direction of the uplink OBU monitoring antenna 1 is opposite to the vehicle-mounted unit 16, and the uplink OBU monitoring antenna 1 can only receive the radio frequency signal transmitted by the vehicle-mounted unit 16 and does not receive the signals of the electronic tags of other vehicles by adjusting the attenuation gain of the uplink OBU monitoring variable attenuator 4; the downlink RSU monitoring antenna 2 is arranged in a vehicle, the main lobe direction of the antenna is opposite to an RSU antenna of an ETC, no solid object blocks the main lobe direction of the antenna, and the antenna can only receive RSU radio frequency signals of a traffic lane or a certain lane range and prevent the receiving of the radio frequency signals of the RSU of a reverse lane by adjusting the attenuation gain of a variable attenuator 5 of the downlink RSU.
The first embodiment is as follows:
when the measured ETC system is a highway toll station lane, when the measurement is started, the vehicle 18 starts to travel at the speed limit of the toll station lane outside the 20 meters under the RSU antenna 17, the gain of the variable attenuator 5 of the RSU is adjusted, so that the downlink RSU monitoring antenna 2 only receives the RSU radio-frequency signal of the measured lane, further the ETC protocol monitoring host and software start to operate, the high-speed reading main control circuit 9 monitors ETC air transaction data cached by a radio-frequency link and an uplink OBU through monitoring the downlink RSU and analyzes data frames, and simultaneously records the time and position information of the acquisition time of each frame and stores the time and position information into a frame database; when the collection vehicle 18 runs to the position under the RSU antenna, the ETC protocol monitoring software extracts all data frames of the current transaction, analyzes the data of the current transaction through an ETC transaction process identification algorithm, stores the data into a transaction database, and further analyzes index parameters and data information such as ETC transaction information frame data, ETC air transaction time, frame communication time, transaction occurrence point positions, transaction completion point positions, transaction areas, lane types, vehicle-mounted unit types and the like through software.
Example two:
when the measured ETC system is a highway portal lane, when the measurement is started, the vehicle 18 normally runs in each lane of the measured highway 200 meters away from the position under the RSU antenna array, the orientation of the downlink RSU monitoring antenna 2 and the gain of the variable attenuator 5 of the downlink RSU are adjusted, so that the downlink RSU monitoring antenna 2 only receives the antenna array coverage area of the RSU of the driving direction lane and cannot receive the antenna signal of the RSU of the opposite lane, further the ETC protocol monitoring host and software start to run, the high-speed reading main control circuit 9 monitors ETC air transaction data cached by a radio frequency link and an uplink OBU monitoring radio frequency link through monitoring the downlink RSU and analyzes data frames, and records the time and position information of the acquisition time of each frame and stores the time and position information into a frame data base; when the collection vehicle 18 runs to the position under the RSU antenna, the ETC protocol monitoring software extracts all data frames of the current transaction, analyzes the data of the current transaction through an ETC transaction process recognition algorithm, stores the data into a transaction database, and further analyzes index parameters and data information such as ETC transaction information frame data, ETC air transaction time, frame communication time, transaction occurrence point positions of lanes, transaction completion point positions of lanes, transaction areas, lane types and vehicle-mounted unit types through software.
The invention relates to an ETC transaction process identification method of a rapid detection system for ETC performance on a highway, which comprises the following steps: as shown in fig. 4, when the apparatus completes monitoring of an ETC transaction process according to an embodiment, acquires ETC transaction source data, each frame of data is identified to a data frame format according to the requirement of "electronic toll collection dedicated short-range communication" specification, such as BST, VST, getsecure.request, getsecure.response, transferchannel.request, transferchannel.response, settmmi.request, settmmi.response, Event _ Report, and the like, and performs data analysis on a non-encrypted portion to acquire required basic information (lane type, vehicle-mounted unit, user card state, and the like), further performs data comparison according to a complete transaction format requirement and a transaction communication number required by a data frame of a transaction process, and if each data frame requirement of the transaction process is a complete transaction; if the data frame in the transaction process is incomplete, the data type of the failed transaction is further judged according to the recognized lane type, the data frame missing condition, the user card state, the transaction communication frequency and the like, and the ETC transaction failure reason is located.
The present invention is not limited to the above-described examples, and various changes can be made without departing from the spirit and scope of the present invention within the knowledge of those skilled in the art.
Claims (7)
1. The utility model provides an on-vehicle ETC agreement monitoring devices of highway which characterized in that includes: go upward OBU and monitor antenna, down RSU and monitor antenna, 4G antenna, go upward OBU and monitor variable attenuator, down RSU's variable attenuator, radio frequency cable, go upward ETC agreement analysis circuit, down ETC agreement analysis circuit, master control circuit, power supply circuit, 4G radio frequency connecting line, fast encoder of wheel, ETC agreement monitoring module, wherein:
the uplink OBU monitoring antenna is connected with a radio frequency interface of the uplink ETC protocol analysis circuit through a radio frequency connecting line and an uplink OBU monitoring variable attenuator; the downlink RSU monitoring antenna is connected with a radio frequency interface of the downlink ETC protocol analysis circuit through a radio frequency connecting line and a downlink RSU monitoring variable attenuator; the uplink ETC protocol analysis circuit is connected with the main control circuit through a high-speed interface and sends monitored ETC uplink transaction data to an embedded program in the main control circuit for data processing; the downlink ETC protocol analysis circuit is connected with the main control circuit through a high-speed interface and sends the monitored downlink ETC transaction data to an embedded program in the main control circuit for data processing; the ETC protocol monitoring module is communicated with an embedded program in a main control circuit, transaction air source code data of a vehicle-mounted unit and an RSU in the ETC transaction process are obtained, identification of an ETC transaction data frame is completed, position information of a current vehicle relative to the RSU is obtained through a wheel speed encoder in the monitoring process, the ETC protocol monitoring module forms a mapping relation between the ETC transaction data frame and the position according to the time of the monitoring process, and finally ETC transaction information frame data, ETC air transaction time, frame communication time, a transaction occurrence point position, a transaction completion point position, a transaction area, a lane type, vehicle-mounted unit type index parameters and data information and places where transaction problems possibly occur are obtained according to the mapping relation.
2. The on-board ETC protocol monitoring device on the highway according to claim 1, wherein the on-board OBU monitoring antenna is a directional antenna with stable gain at a carrier frequency of 5.79GHz-5.80GHz, meets the technical requirement of GBT 20851.1 uplink, is installed in an effective distance from an on-board electronic tag, and is adjusted to a proper gain by controlling an on-board OBU monitoring variable attenuator, so that only radio frequency signals transmitted by the on-board electronic tag are received, and signals of other on-board electronic tags are not received; the downlink RSU monitoring antenna is a directional antenna with stable gain under a carrier frequency of 5.83GHz-5.84GHz, meets the technical requirement of a standard GBT 20851.1 downlink, the width of a half-power lobe of the antenna is smaller than 30 degrees in the vertical direction and the horizontal plane angle, the adjustment gain range of the variable attenuator is monitored by controlling the downlink RSU, only the radio frequency signals of the RSU in a lane or a lane range are received, and the radio frequency signals of the RSU in a reverse lane are prevented from being received.
3. The on-board ETC protocol monitoring device for the expressway according to claim 2, wherein the 4G antenna is a carrier frequency antenna in the range of 430MHz to 2700MHz, has stable positive gain, and is used for sending data source codes monitored by an on-board ETC protocol analyzed by the embedded program to the remote ETC protocol monitoring host.
4. The on-board ETC protocol monitoring device for the highway according to claim 3, wherein the variable attenuator for monitoring the OBU is a radio frequency attenuator capable of adjusting the gain of an on-board OBU monitoring radio frequency link in the range of 6GHz, and the attenuation gain is adjusted to enable the on-board OBU monitoring antenna to only receive radio frequency signals transmitted by the on-board electronic tag and not receive signals of other vehicle electronic tags; the downlink RSU variable attenuator is a radio frequency attenuator capable of adjusting the gain of a downlink RSU monitoring radio frequency link within a 6GHz range, and the downlink RSU monitoring antenna can only receive the radio frequency signals of the lane or the RSU within the lane range by adjusting the attenuation gain, so that the radio frequency signals of the RSU in the reverse lane are prevented from being received.
5. The on-board ETC protocol monitoring device for the expressway according to claim 4, wherein the uplink ETC protocol analyzing circuit is used for receiving signals transmitted by an uplink OBU, further analyzing the signals into ETC data source codes and sending the ETC data source codes to the master control circuit; the downlink ETC protocol analysis circuit is used for receiving the signals transmitted by the downlink RSU, further analyzing the signals into ETC data source codes and sending the ETC data source codes to the master control circuit.
6. The on-vehicle ETC protocol monitoring device of highway according to claim 5, characterized in that, the master control circuit is an integrated circuit based on mainstream embedded chip, receives ETC transaction source code that down and up ETC protocol analytic circuit sent in real time, accomplishes source code analysis through data processing and carries out data framing to send to ETC protocol monitoring module.
7. The on-board ETC protocol monitoring device of claim 6, wherein the wheel speed encoder is a rotary incremental high-precision sensor mounted on the vehicle for acquiring the rotation angle of the vehicle wheel, and calculating the vehicle speed and the driving distance of the wheel according to the radius of the wheel and the time, so that the on-board ETC protocol monitoring device of the highway is matched with the monitoring data and the position data of the monitoring process.
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| CN202110620922.2A CN113472605A (en) | 2021-06-03 | 2021-06-03 | On-vehicle ETC agreement monitoring device of highway |
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| CN202110620922.2A CN113472605A (en) | 2021-06-03 | 2021-06-03 | On-vehicle ETC agreement monitoring device of highway |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114202817A (en) * | 2021-11-30 | 2022-03-18 | 广州市凌特电子有限公司 | ETC radio environment monitoring guarantee method, system, equipment and medium |
| CN116820014A (en) * | 2023-08-24 | 2023-09-29 | 山西交通科学研究院集团有限公司 | Intelligent monitoring and early warning method and system for traffic electromechanical equipment |
-
2021
- 2021-06-03 CN CN202110620922.2A patent/CN113472605A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114202817A (en) * | 2021-11-30 | 2022-03-18 | 广州市凌特电子有限公司 | ETC radio environment monitoring guarantee method, system, equipment and medium |
| CN116820014A (en) * | 2023-08-24 | 2023-09-29 | 山西交通科学研究院集团有限公司 | Intelligent monitoring and early warning method and system for traffic electromechanical equipment |
| CN116820014B (en) * | 2023-08-24 | 2023-11-14 | 山西交通科学研究院集团有限公司 | Intelligent monitoring and early warning method and system for traffic electromechanical equipment |
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Application publication date: 20211001 |