CN113541824A - Highway ETC on-line monitoring system - Google Patents
Highway ETC on-line monitoring system Download PDFInfo
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- CN113541824A CN113541824A CN202110622266.XA CN202110622266A CN113541824A CN 113541824 A CN113541824 A CN 113541824A CN 202110622266 A CN202110622266 A CN 202110622266A CN 113541824 A CN113541824 A CN 113541824A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 146
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- 238000004891 communication Methods 0.000 claims abstract description 34
- 238000012806 monitoring device Methods 0.000 claims abstract description 18
- 238000004458 analytical method Methods 0.000 claims description 15
- 230000036314 physical performance Effects 0.000 claims description 11
- 238000007405 data analysis Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 230000002238 attenuated effect Effects 0.000 claims description 5
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
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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
Abstract
The invention discloses an on-line monitoring system for an ETC on a highway, wherein an ETC monitoring device of the system comprises an ETC aerial data monitoring module, a spectrum sensing module, a communication module, a GPS module, an OBU monitoring variable attenuator, an RSU monitoring variable attenuator, an OBU monitoring antenna, an RSU monitoring antenna and a spectrum sensing antenna, can realize the real-time monitoring of the ETC system performance indexes of a toll station and a portal system under the normal traffic environment of the highway without stopping, closing a road and needing no manual participation, obtains indexes and parameters such as aerial transaction time, frame communication time, frame data, transaction process data, transaction success rate, occupied bandwidth, carrier frequency, maximum field intensity and the like, and realizes the positioning and judgment of whether the RSU normally operates, whether the transaction is normal or not, the transaction is failure reason, positioning lanes, portal software bugs and defects and the like through the accumulation of long-term data and the data mining, and technical basis and solution are provided for stable operation and scientific management and maintenance of the ETC.
Description
Technical Field
The invention belongs to the technical field of ETC, and particularly relates to an on-line monitoring system for an ETC on 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 quality of ETC performance of ETC lanes of the toll stations and portal systems with huge quantity in the national road network directly influences the stable operation of the toll system, so that the key for guaranteeing the stable operation of ETC is to grasp the physical performance, communication related indexes and parameters of ETC.
At present, online monitoring of an ETC on a highway is mainly realized by reading online states of related devices of a toll collection intranet, such as whether an RSU antenna and a controller report errors or not, a snapshot camera running state, whether network devices run normally or not, reading related fault databases and the like, but online monitoring of the toll collection intranet is mainly realized by reading states of monitored devices or self-defined fault codes, and technologies and index parameters which actually affect ETC transaction related are not monitored, such as transaction data frame content, air transaction time, transaction process carrier frequency, occupied bandwidth and other physical performances and communication related indexes and parameters; moreover, frequent communication between the charging intranet and the ETC system equipment may cause the occupation of calculation and network resources of each equipment, resulting in failure of ETC transaction; in addition, the existing part of ETC-related equipment does not support the running state inquiry function, and the monitored content is also ensured.
According to the traditional method, detection personnel are mainly used for detecting the related performance of the ETC in modes of manpower, single point, spot inspection and the like, the detection efficiency is low, the process is long in time consumption, the road sealing treatment is required, huge potential safety hazards exist, the collected ETC related data are only data at a certain moment, and the real-time physical performance and the related indexes of transaction communication during the operation of the ETC system cannot be presented in real time.
Disclosure of Invention
The invention provides an on-line monitoring system for an ETC (electronic toll collection) on a highway, which can not only make up the defect that the on-line equipment monitoring of a charging intranet of an ETC system cannot acquire the related indexes and parameters of the physical property and the data protocol of an RSU (road side unit) of the ETC system, but also solve the outstanding problems that the traditional ETC detection instrument is low in equipment efficiency, a road needs to be sealed in the detection process, the data volume is small and the like, and can provide data sources and maintenance bases for stable operation and scientific management and maintenance of the ETC by monitoring the related indexes and parameters of the operation of the ETC system in real time without increasing the operation burden of the original ETC system.
The technical scheme is as follows:
an expressway ETC on-line monitoring system, comprising: the ETC monitoring device and the ETC monitoring data cloud platform;
the ETC monitoring device includes: ETC aerial data monitoring module, spectrum sensing module, communication module, GPS module, OBU monitor variable attenuator, RSU monitor variable attenuator, OBU monitor antenna, RSU monitor antenna and spectrum sensing antenna, wherein:
the OBU monitoring antenna is connected with a radio frequency interface of an ETC protocol analysis circuit of the ETC air data monitoring module uplink through the OBU monitoring variable attenuator by a radio frequency connecting line; the RSU monitoring antenna is connected with a radio frequency interface of the ETC airborne data monitoring module downlink ETC protocol analysis circuit through a radio frequency connecting line and a 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 main control circuit sends the monitored ETC aerial data to a cloud ETC monitoring data cloud platform database through a communication module; the frequency spectrum sensing antenna is connected with the frequency spectrum sensing module through a radio frequency connecting line, an ETC radio frequency physical index in the appointed direction of the frequency spectrum sensing antenna is obtained in real time, and the frequency spectrum sensing module sends monitored ETC aerial data to a cloud ETC monitoring data cloud platform database through network equipment through a communication module;
the ETC monitoring data cloud platform acquires carrier frequency, occupied bandwidth, field intensity change, ETC transaction information frame data, ETC air transaction time, frame communication time, lane type, vehicle-mounted unit type information and possible places where transaction problems occur of a monitored ETC system through data analysis and algorithm on real-time acquired ETC system RSU physical performance indexes and ETC air data in a database.
Furthermore, the ETC air data monitoring module collects air plaintext data source codes of downlink and uplink transactions of the ETC system in real time, the air plaintext data source codes are analyzed into BST or VST type frame data through the data processing program source codes to form data framing, and the data framing is sent to the cloud ETC monitoring data cloud platform database through equal interfaces of the communication module through network equipment of a public network or a charging intranet.
Further, the uplink ETC protocol analysis circuit is used for receiving and analyzing the signal transmitted by the OBU into an ETC data source code; and the downlink ETC protocol analysis circuit is used for receiving and analyzing the signal transmitted by the RSU into an ETC data source code.
Further, the spectrum sensing module collects RSU physical performance indexes, including: the carrier frequency, the occupied bandwidth and the field intensity are read according to data and interface protocols, and the indexes and the parameter values are sent to a cloud ETC monitoring data cloud platform database through interfaces of a communication module and network equipment of a public network or a charging intranet.
Further, the communication module is used for sending the data of ETC aerial data monitoring module, spectrum sensing module and GPS module to high in the clouds ETC monitoring data cloud platform database, including switch, router, serial ports switching network port module and 4G 5G module.
Furthermore, the OBU monitoring variable attenuator is a radio frequency attenuator capable of adjusting the gain of an OBU monitoring radio frequency link within the range of 6GHz, and the uplink OBU monitoring antenna can only receive radio frequency signals transmitted by electronic tags on target ETC lane vehicles and does not receive signals of electronic tags of other vehicles by adjusting the attenuation gain; the RSU variable attenuator is a radio frequency attenuator capable of adjusting the gain of an RSU monitoring radio frequency link within a 6GHz range, and the RSU monitoring antenna can only receive RSU radio frequency signals of a target lane or a certain lane range by adjusting the attenuation gain.
Furthermore, the OBU monitoring antenna is a directional antenna with stable gain under a carrier frequency of 5.79GHz-5.80GHz, meets the technical requirement of a standard GBT 20851.1 uplink, achieves different coverage ranges by selecting directional antennas with different types of half-power lobe widths and horizontal plane angles, and is adjusted to be proper in gain and installation position by controlling the uplink OBU monitoring variable attenuator, so that the antenna can only receive radio frequency signals of electronic tags on vehicles in a target ETC lane and does not receive signals of electronic tags of other vehicles; the 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, achieves different coverage ranges by selecting directional antennas with different types of half-power lobe widths and horizontal plane angles, and can only receive RSU radio-frequency signals in a target lane or a certain lane range by controlling the gain range and the installation position of a downlink RSU monitoring variable attenuator.
Furthermore, the frequency spectrum sensing antenna is a directional antenna with stable gain under a carrier frequency of 5.83GHz-5.84GHz, stable ETC radio frequency signal gain is provided for the frequency spectrum sensing module by selecting directional antennas with different types of half-power lobe widths and different horizontal plane angles to achieve different coverage ranges, data acquisition is carried out on the RSU of the target lane ETC system through the specific installation position, the gain of the RSU antenna of a non-target lane is sharply attenuated, and the measurement result of the RSU antenna of the measured lane is not influenced.
The utility model provides a highway ETC on-line monitoring system's ETC monitoring data cloud platform and relevant supporting software, erect with public network, the cloud computing platform that can provide calculation, network and storage capacity on the charging net or other networks, relevant supporting software such as installation ETC monitoring data monitoring software and database for can carry out data processing, the visual show of storage and application to RSU physical properties index and the aerial data of ETC of gathering, and support multi-end access such as PC end, removal end.
The invention can monitor the RSU physical property and data protocol related index of the ETC system in real time, has large and complete data volume and can effectively reflect the real performance condition of the ETC system; the monitoring process is not influenced by traffic conditions, and road sealing and field operation are not needed, so that potential safety hazards are effectively reduced; the data analysis can be carried out on the transactions (success, failure and the like) which have already occurred, and systematic defect holes or defect problems can be traced.
Drawings
Fig. 1 is a schematic diagram of a principle framework of an on-line highway ETC monitoring system according to the present invention.
Fig. 2 is a schematic structural connection diagram of an on-line highway ETC monitoring system according to the present invention.
Fig. 3 is a schematic view of an application example 1 of an on-line highway ETC monitoring system according to the present invention.
Fig. 4 is a schematic diagram of an application example 2 of an on-line highway ETC monitoring system according to the present invention.
Fig. 5 is a schematic diagram of an application example 3 of an on-line highway ETC monitoring system according to the present invention.
The reference symbols in the above figures have the following meanings:
1-an ETC monitoring device; 2-a network device; 3-a cloud platform; a 4-RSU antenna; 5-vehicle electronic label; 101-ETC air data monitoring module; 102-a spectrum sensing module; 103-a communication module; 104-a GPS module; 105-the OBU monitoring the variable attenuator; 106-RSU monitoring variable attenuator; 107-OBU monitoring antenna; 108-RSU listening antenna; 109 spectrum sensing antenna.
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 ETC online monitoring system 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.
As shown in fig. 1 and 2, are schematic diagrams of the principles, overall structure, and hardware connections of the present invention. The highway ETC on-line monitoring system comprises an ETC monitoring device 1, an ETC monitoring data cloud platform and related matched software 3, wherein the ETC monitoring device comprises an ETC aerial data monitoring module 101, a spectrum sensing module 102, a communication module 103, a GPS module 104, an OBU monitoring variable attenuator 105, an RSU monitoring variable attenuator 106, an OBU monitoring antenna 107, an RSU monitoring antenna 108 and a spectrum sensing antenna 109.
The OBU monitoring antenna 107 is connected with a radio frequency interface of an uplink ETC protocol analysis circuit of the ETC air data monitoring module 101 of the ETC monitoring device 1 through a radio frequency connecting line and the OBU monitoring variable attenuator 105; the RSU monitoring antenna 108 is connected to the radio frequency interface of the downstream ETC protocol analyzing circuit of the ETC air data monitoring module 101 of the ETC monitoring device 1 through the RSU monitoring variable attenuator 106 via the radio frequency connection line; the uplink ETC protocol analysis circuit is connected with the main control circuit through a network port, a USB and other high-speed interfaces, 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 network port, a USB and other high-speed interfaces, and sends monitored ETC downlink transaction data to an embedded program in the main control circuit for data processing; the main control circuit is externally provided with a clock circuit, a power supply conversion circuit, a buzzer, an indicator light and other circuits; the master control circuit sends the monitored ETC air data to a cloud ETC monitoring data cloud platform database 3 through the communication module 103 through network equipment; the spectrum sensing antenna 109 is connected with the spectrum sensing module 102 through a radio frequency connection line, so that radio frequency physical indexes of an ETC system RSU in the designated direction of the spectrum sensing antenna 109 can be obtained in real time, and further the spectrum sensing module 102 sends the monitored ETC aerial data to the cloud ETC monitoring data cloud platform database 3 through the communication module 103 through the network device 2; the built-in relevant software 3 of the ETC monitoring data cloud platform can acquire information such as carrier frequency, occupied bandwidth, field intensity change, ETC transaction information frame data, ETC air transaction time, frame communication time, lane types, vehicle-mounted unit types and the like of the RSU of the ETC system collected in real time in a database and ETC air data through data analysis and algorithm, and places where transaction problems are likely to occur, so that technical basis and solution are provided for stable operation and scientific management and maintenance of the ETC.
Fig. 3, 4 and 5 show an implementation method of an on-line highway ETC monitoring system according to the present invention. The ETC monitoring device 1 is installed on a fixed structure of a toll station and a portal system, and further monitors application scenes and user requirements on line according to the ETC system, different types of OBU monitoring antennas 107, RSU monitoring antennas 108 and spectrum sensing antennas 109 with vertical half-power lobe widths and horizontal plane angles are preferably selected, so that the ETC system with the antenna gain direction only covering the range of a monitored target lane is selected, the physical performance and ETC aerial data of the ETC system are carried out through the ETC aerial data monitoring module 101 and the spectrum sensing module 102 of the ETC monitoring device 1, the ETC aerial data are sent to a cloud ETC monitoring data cloud platform database of the cloud platform 3 through the communication module 103 and the network equipment 2, and the carrier frequency, the occupied bandwidth, the field intensity change, ETC transaction information frame data, ETC aerial transaction time, frame communication time, lane type data, ETC carrier frequency of the RSU of the monitored system are further obtained through data analysis and algorithm, The type of on-board unit, etc., and where possible transaction problems may occur.
The first implementation example:
the toll single lane monitoring application of the highway ETC online monitoring system toll station is as shown in fig. 3, wherein an ETC monitoring device 1 is installed on an antenna vertical rod, wherein an RSU monitoring antenna 108 and a tested RUS antenna 4 are only installed adjacently, so that the main lobe direction of the RSU monitoring antenna 108 covers the tested RUS antenna 4, and the gain of the RSU monitoring variable attenuator is adjusted to enable an ETC airborne data monitoring module 101 to only monitor data sent by the tested RUS antenna; the OBU monitoring antenna 107 is arranged in the middle of the vertical rod cross-bar lane, the OBU monitoring antenna 107 within the range of a single lane to be detected can be covered by selecting the vertical half-power lobe width and the horizontal plane angle width, the main lobe direction of the OBU monitoring antenna 107 is adjusted to the direction of the transaction center of the RSU antenna 4 to be detected, and the gain of the OBU monitoring variable attenuator is adjusted to enable the ETC air data monitoring module 101 to only monitor data sent by the vehicle electronic tag of the lane to be detected and not receive data sent by the electronic tag of an adjacent lane; the spectrum sensing antenna 109 is fixedly arranged on a fixed structure at the side of the lane, the main lobe direction is over against the RSU antenna 4, so that the spectrum sensing module 102 can only collect the spectrum sensing data of the RSU antenna 4 of the lane to be detected, the gain is sharply attenuated in the antenna direction of the RSU of the adjacent lane, and the measurement result of the RSU antenna of the lane to be detected is not influenced; the ETC system RSU physical performance and the ETC air data are carried out through an ETC air data monitoring module 101 and a spectrum sensing module 102 of an ETC monitoring device 1, the ETC air data and the ETC air data are sent to a cloud ETC monitoring data cloud platform database of a cloud platform 3 through a communication module 103 and a network device 2, further, information such as a monitored ETC system RSU carrier frequency, occupied bandwidth, field intensity change, ETC transaction information frame data, ETC air transaction time, frame communication time, lane types and vehicle-mounted unit types are obtained through data analysis and algorithm, and possible places where transaction problems are likely to occur are obtained.
Example two was implemented:
as shown in fig. 4, the ETC monitoring device 1 is arranged on a vertical rod on a portal frame, wherein an RSU monitoring antenna 108 is arranged on a fixed structure at a certain position of a roadside, so that the main lobe direction of the RSU monitoring antenna 108 covers a plurality of RUS antennas 4 of a tested multi-lane, and the gain of an RSU monitoring variable attenuator is adjusted to enable an ETC airborne data monitoring module 101 to cover and monitor data sent by the RUS antennas of the tested multi-lane; the OBU monitoring antenna 107 is arranged in the middle of a cross bar of a portal system, the OBU monitoring antenna 107 in the range of a detected multi-lane can be covered by selecting the vertical width of a half-power lobe and the angular width of a horizontal plane, the main lobe direction of the OBU monitoring antenna 107 is adjusted to the direction of a transaction center of a plurality of RSU antennas 4 in the detected multi-lane, and the gain of an OBU monitoring variable attenuator is adjusted to enable the ETC air data monitoring module 101 to cover data sent by an electronic tag of a vehicle which monitors multiple passing lanes of the detected vehicle and not receive data of the electronic tag of a vehicle in a reverse lane; the spectrum sensing antenna 109 is fixedly arranged on a fixed structure at the lane side, the main lobe direction is over against the RSU antenna 4 of the detected target lane, so that the spectrum sensing module 102 can only collect the spectrum sensing data of the RSU antenna 4 of the detected target lane, the gain is sharply attenuated in the direction of the RSU antenna of the non-target lane, and the measurement result of the RSU antenna of the detected target lane is not influenced; the ETC system RSU physical performance and the ETC air data are carried out through an ETC air data monitoring module 101 and a spectrum sensing module 102 of an ETC monitoring device 1, the ETC air data and the ETC air data are sent to a cloud ETC monitoring data cloud platform database of a cloud platform 3 through a communication module 103 and a network device 2, further, information such as a monitored ETC system RSU carrier frequency, occupied bandwidth, field intensity change, ETC transaction information frame data, ETC air transaction time, frame communication time, lane types and vehicle-mounted unit types are obtained through data analysis and algorithm, and possible places where transaction problems are likely to occur are obtained.
Example three was implemented:
as shown in fig. 5, the ETC monitoring device 1 is installed on an antenna portal vertical rod, wherein, the RSU monitoring antenna 108 and the detected RUS antenna 4 are only installed adjacently, so that the main lobe direction of the RSU monitoring antenna 108 covers the detected target lane RUS antenna 4, and the gain of the RSU monitoring variable attenuator is adjusted to enable the ETC air data monitoring module 101 to only monitor the data sent by the detected lane RUS antenna; the OBU monitoring antenna 107 is installed on a middle portal of a detected lane, the OBU monitoring antenna 107 with half-power lobe width vertical and horizontal plane angle width capable of covering the range of a detected single lane is selected, the main lobe direction of the OBU monitoring antenna 107 is adjusted to the direction of a transaction center of a detected RSU antenna 4, and the gain of an OBU monitoring variable attenuator is adjusted to enable the ETC air data monitoring module 101 to monitor only data sent by an electronic tag of a detected lane vehicle and not receive data sent by an electronic tag of an adjacent lane; the spectrum sensing antenna 109 is fixedly arranged on a lane side fixing structure, the main lobe direction is over against the RSU antenna 4 of the detected target lane, so that the spectrum sensing module 102 can only collect the spectrum sensing data of the RSU antenna 4 of the detected target lane, the gain is sharply attenuated in the antenna direction of the RSU of the adjacent lane, and the measurement result of the RSU antenna of the detected lane is not influenced; the ETC system RSU physical performance and the ETC air data are carried out through an ETC air data monitoring module 101 and a spectrum sensing module 102 of an ETC monitoring device 1, the ETC air data and the ETC air data are sent to a cloud ETC monitoring data cloud platform database of a cloud platform 3 through a communication module 103 and a network device 2, further, information such as a monitored ETC system RSU carrier frequency, occupied bandwidth, field intensity change, ETC transaction information frame data, ETC air transaction time, frame communication time, lane types and vehicle-mounted unit types are obtained through data analysis and algorithm, and possible places where transaction problems are likely to occur are obtained.
The on-line monitoring system for the highway ETC can realize the real-time monitoring of ETC performance indexes of a toll station and a portal system under the conditions of no parking, no road closing and no need of manual participation of a highway in a normal traffic environment, and can realize the positioning and judgment of whether an RSU normally operates, whether a transaction is normal, transaction failure reasons, positioning lanes, portal software bugs and defects and the like by processing and analyzing data, such as air transaction time, frame communication time, frame data, transaction process data, occupied bandwidth, carrier frequency, maximum field intensity, transaction success rate and the like, and further according to the analysis and evaluation of the monitored data and the deep mining of historical accumulated data, thereby providing technical bases and solutions for the stable operation and scientific management and maintenance of the ETC.
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 (8)
1. The utility model provides a highway ETC on-line monitoring system which characterized in that includes: the ETC monitoring device and the ETC monitoring data cloud platform;
the ETC monitoring device includes: ETC aerial data monitoring module, spectrum sensing module, communication module, GPS module, OBU monitor variable attenuator, RSU monitor variable attenuator, OBU monitor antenna, RSU monitor antenna and spectrum sensing antenna, wherein:
the OBU monitoring antenna is connected with a radio frequency interface of an ETC protocol analysis circuit of the ETC air data monitoring module uplink through the OBU monitoring variable attenuator by a radio frequency connecting line; the RSU monitoring antenna is connected with a radio frequency interface of the ETC airborne data monitoring module downlink ETC protocol analysis circuit through a radio frequency connecting line and a 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 main control circuit sends the monitored ETC aerial data to a cloud ETC monitoring data cloud platform database through a communication module; the frequency spectrum sensing antenna is connected with the frequency spectrum sensing module through a radio frequency connecting line, an ETC radio frequency physical index in the appointed direction of the frequency spectrum sensing antenna is obtained in real time, and the frequency spectrum sensing module sends monitored ETC aerial data to a cloud ETC monitoring data cloud platform database through network equipment through a communication module;
the ETC monitoring data cloud platform acquires carrier frequency, occupied bandwidth, field intensity change, ETC transaction information frame data, ETC air transaction time, frame communication time, lane types, vehicle-mounted unit type information and possible places where transaction problems occur of a monitored ETC system through data analysis and algorithm on real-time acquired ETC system RSU physical performance indexes and ETC air data in a database.
2. The highway ETC on-line monitoring system according to claim 1, wherein the ETC airborne data monitoring module collects airborne plaintext data source codes of downstream and upstream transactions of the ETC system in real time, the airborne plaintext data source codes are analyzed into BST or VST type frame data through a data processing program to form data framing, and the data framing is sent to a cloud ETC monitoring data cloud platform database through a network device of a public network or a toll intranet through an equal interface of the communication module.
3. The on-line highway ETC monitoring system according to claim 2, wherein said upstream ETC protocol analyzing circuit is configured to receive and analyze signals transmitted by the OBU into ETC data source codes; and the downlink ETC protocol analysis circuit is used for receiving and analyzing the signal transmitted by the RSU into an ETC data source code.
4. The on-line highway ETC monitoring system according to claim 3, wherein said spectrum sensing module collects RSU physical property indexes, including: the carrier frequency, the occupied bandwidth and the field intensity are read according to data and interface protocols, and the indexes and the parameter values are sent to a cloud ETC monitoring data cloud platform database through interfaces of a communication module and network equipment of a public network or a charging intranet.
5. The highway ETC online monitoring system according to claim 4, wherein the communication module is used for sending the data of the ETC aerial data monitoring module, the spectrum sensing module and the GPS module to a cloud ETC monitoring data cloud platform database, and comprises a switch, a router, a serial port to network port module and a 4G/5G module.
6. The on-line monitoring system for the ETC on the highway according to claim 5, wherein the OBU monitoring variable attenuator is a radio frequency attenuator capable of adjusting the gain of an OBU monitoring radio frequency link in the range of 6GHz, and the uplink OBU monitoring antenna can only receive radio frequency signals transmitted by electronic tags on vehicles in a target ETC lane and does not receive signals of electronic tags of other vehicles by adjusting the attenuation gain; the RSU variable attenuator is a radio frequency attenuator capable of adjusting the gain of an RSU monitoring radio frequency link within a 6GHz range, and the RSU monitoring antenna can only receive RSU radio frequency signals of a target lane or a certain lane range by adjusting the attenuation gain.
7. The on-line monitoring system for the ETC on the highway according to claim 6, wherein the 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, achieves different coverage ranges by selecting directional antennas with different types of half-power lobe widths and horizontal plane angles, and is adjusted to a proper gain and installation position by controlling an uplink OBU monitoring variable attenuator, so that the antenna can only receive radio-frequency signals of electronic tags on vehicles on a target ETC lane and does not receive signals of electronic tags of other vehicles; the 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, achieves different coverage ranges by selecting directional antennas with different types of half-power lobe widths and horizontal plane angles, and can only receive RSU radio-frequency signals in a target lane or a certain lane range by controlling the gain range and the installation position of a downlink RSU monitoring variable attenuator.
8. The on-line highway ETC monitoring system according to claim 7, wherein the spectrum sensing antenna is a directional antenna with stable gain at a carrier frequency of 5.83GHz-5.84GHz, stable ETC radio-frequency signal gain is provided for the spectrum sensing module by selecting different types of directional antennas with half-power lobe widths vertical and horizontal plane angles to reach different coverage ranges, data acquisition is carried out on spectrum data physical performance indexes of RSUs of a target lane ETC system through a specific installation position, the gain of the RSU antenna of a non-target lane is sharply attenuated, and the measurement result of the RSU antenna of a tested lane is not influenced.
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| CN202110622266.XA CN113541824A (en) | 2021-06-03 | 2021-06-03 | Highway ETC on-line monitoring system |
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| CN202110622266.XA CN113541824A (en) | 2021-06-03 | 2021-06-03 | Highway ETC on-line monitoring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362844A (en) * | 2021-12-29 | 2022-04-15 | 北京万集科技股份有限公司 | Antenna device, method for diagnosing a malfunction of an on-board unit and related product |
| CN114898568A (en) * | 2022-05-09 | 2022-08-12 | 广州市弘安警用设备科技有限公司 | Vehicle noninductive acquisition equipment |
-
2021
- 2021-06-03 CN CN202110622266.XA patent/CN113541824A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362844A (en) * | 2021-12-29 | 2022-04-15 | 北京万集科技股份有限公司 | Antenna device, method for diagnosing a malfunction of an on-board unit and related product |
| CN114898568A (en) * | 2022-05-09 | 2022-08-12 | 广州市弘安警用设备科技有限公司 | Vehicle noninductive acquisition equipment |
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