CN115830730A

CN115830730A - RSU equipment integrating ETC fee deduction, traffic flow monitoring and Beidou positioning

Info

Publication number: CN115830730A
Application number: CN202211429459.4A
Authority: CN
Inventors: 陈文倩; 何玉容
Original assignee: Guangzhou Mainchance Communication Technology Co ltd
Current assignee: Guangzhou Mainchance Communication Technology Co ltd
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-03-21

Abstract

The invention relates to an RSU device integrating ETC fee deduction, traffic flow monitoring and Beidou positioning, and the RSU device integrating ETC fee deduction, traffic flow monitoring and Beidou positioning provided by the invention has the function of finishing the ETC fee deduction through interaction of a 5.8G module and a vehicle-mounted unit, and is also provided with a 2G/4G wireless network module to enable the RSU device to be in wireless communication with a server end, so that the RSU does not use a signal line in the installation process, and various problems caused by the signal line can be avoided; in addition, the positioning problem of the RSU after the RSU can move is also considered, and a Beidou positioning module is additionally arranged to monitor the position of the RSU in real time, so that the safety of the position of the RSU is ensured; and the RSU can also record the traffic flow by reading the vehicle information through interaction with the vehicle-mounted unit through the traffic flow monitoring unit, and judge whether the traffic flow is abnormal or not when the server side receives the traffic flow information reported by the RSU, so that the functions of the RSU equipment are enriched.

Description

RSU equipment integrating ETC fee deduction, traffic flow monitoring and Beidou positioning

Technical Field

The invention relates to the technical field of ETC correlation, in particular to RSU equipment integrating ETC fee deduction, traffic flow monitoring and Beidou positioning.

Background

The RSU is connected with the upper computer through a network cable except being used as a medium for communicating with the OBU in the whole ETC system, and key execution actions such as RSU fee deduction and the like need to be commanded and authorized by the upper computer. Therefore, in the existing ETC system, the whole function of the RSU can not be controlled by the upper computer. This also means that the RSUs cannot be arranged anywhere at will. Since, in addition to the supply of power, an upper computer with similar functions is also required to be arranged. Otherwise, the RSU can not complete key functions such as fee deduction.

At present, the RSU has 5.8G microwave communication capability and conforms to the special short-range communication physical layer standard for GB/T20851.1-2019 electronic toll collection. The system is provided with a network cable interface, performs data interaction with an upper computer in a wired mode, and is controlled by the upper computer to complete key functions such as fee deduction and the like. Generally, the ETC fee deduction software function is only provided.

The above RSU scheme has the following disadvantages:

the function is single. Currently, the main application service of the RSU is an ETC fee deduction service. The traffic flow monitoring is actually carried out through the RSU, and the traffic flow monitoring is very convenient without other functions.

The scene is single. The RSU is limited to a single function, and only supports the ETC fee deduction service, so that the class is single in the usage scenario. More different application scenarios cannot be supported.

The position itself cannot be monitored. The RSU is generally not repositioned after installation. However, in the actual use process, migration is inevitable. If the mobile terminal is moved maliciously by people, or the mobile terminal is accidentally deviated due to improper installation, long time and the like. These movements may have an impact on the RSU functionality.

The installation is troublesome. Since the RSU needs to be controlled by the upper computer, in the current solution, the RSU needs to be connected with the upper computer through a network cable. Therefore, in the installation process, the RSU is connected with a power line, and a network cable between the RSU and an upper computer is also required to be connected. Because RSU and host computer mounted position diverse lead to the net twine that uses also to be different in length, can influence the installation effectiveness during the installation. Especially when the network cable is used for a long time, the routing position of the network cable also needs to be considered. In addition, the access of the RSU can be limited by the number of network cable interfaces of the upper computer.

The installation environment requirement is high. In order to realize the whole function, the number of the upper computers is required to be reduced. This also requires that the user must be equipped with a higher-level machine. And the upper machine is generally large in size, and the working environment is of a shielding type. This complicates the conditions under which the RSU operates.

Disclosure of Invention

The invention aims to at least solve one of the defects of the prior art and provides RSU equipment integrating ETC fee deduction, traffic flow monitoring and Beidou positioning.

In order to achieve the purpose, the invention adopts the following technical scheme:

concretely, it detains RSU equipment of fee, traffic flow control and big dipper location to put forward collection ETC, includes following:

the power supply module is used for supplying power to the RSU equipment;

the 5.8G module is used for carrying out information interaction with the vehicle-mounted unit;

the 2G/4G wireless network module is used for connecting the RSU equipment with a 2G/4G network so as to realize network data transmission with the server;

the Beidou positioning module is used for carrying out Beidou positioning on the RSU equipment and acquiring the position information of the RSU equipment in real time;

the MCU service processing module comprises a MCU service processing module,

the ETC fee deduction unit is used for performing information interaction with the vehicle-mounted unit through the 5.8G module to finish the ETC fee deduction,

the traffic flow monitoring unit is used for carrying out information interaction with the vehicle-mounted unit through the 5.8G module, acquiring vehicle information to carry out traffic flow data acquisition and uploading the traffic flow data to a server,

and the position information acquisition unit is used for acquiring the positioning information of the Beidou positioning module and uploading the positioning information to the server.

Further, specifically, the power module includes a voltage conversion unit, the voltage conversion unit is configured to convert a 24V dc voltage into a voltage required by each module, and the power module provides a working current of 3A.

Further, specifically, the 5.8G module includes a transmitting/receiving array antenna, a transmitting/receiving amplifier circuit, and a 5.8G receiver, the 5.8G module is configured to perform wireless communication with the vehicle-mounted unit, transmit and receive 5.8G signals, and convert an analog signal into a digital signal, the 5.8G module has two DSRC channels, and the physical layer parameters satisfy part 1 of "GBT 20851.1-2019 dedicated short-range communication for electronic toll collection: physical layer >; the DSRC data protocol packet meets the 2 nd part of the short-range communication special for GB/T20851.2-2019 electronic charging: data link layer requirements.

Further, specifically, the 2G/4G wireless network module includes a 2G/4G module and an LTE/GPRS antenna, the 2G/4G wireless network module is used for connecting to a 2G/4G network to implement network data transmission, after the 2G/4G wireless network module is powered on, the network searching and SIM card searching work is automatically completed, and after the network connection is stable, the RSU device will connect to the server through the 2G/4G wireless network module and start to perform information interaction with the server.

Further, the position information obtaining unit is also configured to,

after the positioning information of the Beidou positioning module is obtained, redundant filtering processing is carried out on the positioning information so as to solve the problem of possible static drift in the positioning information, and after the redundant filtering processing is finished, the final positioning information is uploaded to a server.

Further, the MCU service processing module also comprises,

and the continuous transmission unit is used for automatically keeping the relevant data of the information interaction when the network is not smooth in the midway of the information interaction of the server and automatically performing continuous transmission processing when the network is smooth.

Further, the MCU service processing module also comprises,

and the IAP upgrading unit is used for carrying out IAP upgrading on the RSU equipment when an IAP upgrading instruction from the server is received.

Further, the RSU device further comprises,

and the protection module is used for providing lightning protection and antistatic functions for the RSU equipment.

The invention also provides a system based on the RSU equipment integrating the ETC fee deduction, the traffic flow monitoring and the Beidou positioning, which applies any one of the RSU equipment integrating the ETC fee deduction, the traffic flow monitoring and the Beidou positioning, and comprises,

the RSU devices are respectively preset at each target position and are used for ETC fee deduction, vehicle flow monitoring and self positioning;

and the server is arranged at the cloud end, is in communication connection with the RSU equipment, and is used for receiving traffic flow information and positioning information from the RSU equipment, performing traffic flow abnormity early warning according to the traffic flow information, and performing position abnormity early warning according to the positioning information.

Further, specifically, the server performs traffic flow abnormality warning according to the traffic flow information, which includes the following steps,

randomly extracting a plurality of instantaneous traffic flows within a (T, T + NT) time range by taking a period T as a reference, wherein T is selected initial time, and N is a positive integer;

a two-dimensional coordinate system is constructed by taking a time axis as a horizontal axis, an instantaneous traffic flow as a vertical axis and (t, 0) as a coordinate origin, and a plurality of discrete points with horizontal coordinates in the range of (t, t + NT) exist in the two-dimensional coordinate system;

fitting all the discrete points through a fitting algorithm to obtain a fitted line, and defining the fitted line as a traffic flow standard line;

predicting a plurality of instantaneous traffic flows in the time range of the next period (t + NT, t +2 NT) by using the traffic flow standard line, wherein the predicting mode is as follows:

respectively calculating the shortest distance between discrete points formed by a plurality of instantaneous vehicle flow rates in the time range of (t + NT, t +2 NT) and a vehicle flow rate standard line, counting the number P of the discrete points exceeding a first threshold value,

and if the number P exceeds a second threshold value, judging that the traffic flow is abnormal, carrying out traffic flow abnormity early warning, and giving up the periodic sampling data with the traffic flow abnormal condition.

The beneficial effects of the invention are as follows:

the RSU equipment integrating the ETC fee deduction, the vehicle flow monitoring and the Beidou positioning has the function of finishing the ETC fee deduction through interaction of the 5.8G module and the vehicle-mounted unit, and is in wireless communication with the server end through the arrangement of the 2G/4G wireless network module, so that the RSU does not use a signal line in the installation process, and various problems caused by the signal line can be avoided; in addition, the positioning problem of the RSU after the RSU can move is also considered, and a Beidou positioning module is additionally arranged to monitor the position of the RSU in real time, so that the safety of the position of the RSU is ensured; and the RSU can also record the traffic flow by reading the vehicle information through interaction with the vehicle-mounted unit through the traffic flow monitoring unit, and judge whether the traffic flow is abnormal or not when the server side receives the traffic flow information reported by the RSU, so that the functions of the RSU equipment are enriched.

Drawings

The foregoing and other features of the present disclosure will become more apparent from the detailed description of the embodiments shown in conjunction with the drawings in which like reference characters designate the same or similar elements throughout the several views, and it is apparent that the drawings in the following description are merely some examples of the present disclosure and that other drawings may be derived therefrom by those skilled in the art without the benefit of any inventive faculty, and in which:

fig. 1 is a block diagram showing a structure of an RSU device integrating ETC fee deduction, traffic flow monitoring and Beidou positioning according to the present invention;

fig. 2 is a block diagram of an MCU service processing module integrating ETC fee deduction, traffic flow monitoring, and beidou positioning according to the present invention.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the schemes and the effects of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The same reference numbers will be used throughout the drawings to refer to the same or like parts.

Referring to fig. 1 and 2, in embodiment 1, the invention provides an RSU device integrating ETC fee deduction, traffic flow monitoring and Beidou positioning, including the following:

the power supply module is used for supplying power to the RSU equipment;

the MCU service processing module comprises a MCU service processing module,

As a preferred embodiment of the present invention, specifically, the power module includes a voltage conversion unit, the voltage conversion unit is configured to convert a 24V dc voltage into a voltage required by each module, and the power module provides an operating current of 3A.

In the preferred embodiment, the power module mainly functions to convert the 24V dc voltage into voltages required by each module, including 12V, 3.3V and 5V, and can provide 3A working current, and has good linearity and load regulation characteristics, complete protection circuit, current limitation, thermal shutdown function, and the like.

As a preferred embodiment of the present invention, specifically, the 5.8G module includes a transmitting/receiving array antenna, a transmitting/receiving amplifier circuit, and a 5.8G receiver, the 5.8G module is configured to perform wireless communication with an on-board unit, perform transmission and reception of 5.8G signals, and implement conversion from analog signals to digital signals, the 5.8G module includes two DSRC channels, and physical layer parameters satisfy part 1 of "GBT 20851.1-2019 special short-range communication for electronic toll collection: physical layer >; the DSRC data protocol packet meets the 2 nd part of the short-range communication special for GB/T20851.2-2019 electronic charging: data link layer requirements.

As a preferred embodiment of the present invention, specifically, the 2G/4G wireless network module includes a 2G/4G module and an LTE/GPRS antenna, the 2G/4G wireless network module is used for connecting to a 2G/4G network to implement network data transmission, after the 2G/4G wireless network module is powered on, network searching and SIM card searching are automatically completed, and after network connection is stable, the RSU device will connect to the server through the 2G/4G wireless network module and start information interaction with the server.

As a preferred embodiment of the present invention, the position information acquiring unit is further configured to,

As a preferred embodiment of the present invention, the MCU service processing module further comprises,

and the IAP upgrading unit is used for carrying out IAP upgrading on the RSU equipment when receiving an IAP upgrading instruction from the server.

As a preferred embodiment of the present invention, the RSU device further comprises,

and the protection module is used for providing the RSU equipment with the functions of lightning protection and static prevention.

In an application example, after the RSU device is powered on, the modules are initialized, and the basic operation parameters are loaded.

After the initialization is finished, the 2G/4G module automatically finishes the network searching and the work of searching the SIM card. The MCU acquires information such as whether the SIM card is inserted or not, network environment state and the like through accessing the 2G/4G module, so that different networking strategies are selected. In general, a module preferentially uses a 4G network and automatically switches to a 2G network to continue to maintain a network link, and continues to search for a network and perform reconnection when there is no network. After the network connection is stabilized, the equipment can be actively connected with the background server and starts to interact with the background server.

After the initialization is completed, the 5.8G module starts to transmit 14K square waves based on the 5.8G frequency under the control of the MCU for waking up an On Board Unit (OBU). The RSU then continues to send BSTs, waiting for the on board unit to return to the VST, thereby putting the RSU and OBU into dedicated link mode. And then, according to a part 3 of GB/T20851.3-2019 special short-range communication for electronic charging, between the two devices: the application layer standard performs data application layer interaction. And the functions of vehicle information acquisition and ETC fee deduction are completed.

After the initialization is completed, the MCU controls the positioning module to start Beidou positioning. After the positioning is finished, in order to ensure the accuracy and the real-time performance of the positioning, the MCU still can acquire updated positioning data from the positioning module all the time, and the data is subjected to redundant filtering processing, so that the problem of static drift in the positioning is solved. After reliable positioning, the MCU uploads the positioning data to the server.

After the main module works, the MCU uploads the data to the server according to a certain time interval or a certain quantity of acquired vehicle information. If the network is unsmooth in the midway, the equipment can automatically retain the data and automatically carry out supplementary transmission processing. Typically, the RSU repeats the vehicle acquisition functions continuously and uploads these data to the server. And simultaneously, the RSU monitors the server instruction all the time. When receiving a server ETC fee deduction command, the RSU executes fee deduction action. When receiving a server IAP upgrade, the RSU will perform the IAP function.

the RSU devices are respectively preset at each target position and are used for ETC fee deduction, vehicle flow monitoring and self-positioning;

As a preferred embodiment of the present invention, specifically, the server performs traffic flow abnormality warning according to the traffic flow information includes the following,

fitting all the discrete points through a fitting algorithm to obtain a fit line, and defining the fit line as a traffic flow standard line;

In the preferred embodiment, a traffic flow standard line is obtained by analyzing instantaneous traffic flow data in one period, abnormal prediction is carried out on traffic flow data in the next period by using the traffic flow standard line, when calculation is carried out, a period T is added to the abscissa of the traffic flow standard line respectively, the traffic flow standard line is translated into the next period, then the shortest distance from all sampling points in the next period to the traffic flow standard line is calculated, the number P of discrete points exceeding a first threshold value is counted, if the number of P exceeds a second threshold value, it is judged that traffic flow abnormality exists in the next period (T + NT, T +2 NT), then sampling data in the next period (T + NT, T +2 NT) are abandoned, the traffic flow standard line obtained by calculation of (T, T + NT) is used for calculating sampling data in the next period (T +2NT, T3NT), and at the time, the traffic flow standard line is translated for 2 periods to the next period correspondingly, and the traffic flow abnormality can be monitored accurately by analogy.

The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, functional modules in the embodiments of the present invention may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium and can implement the steps of the above-described method embodiments when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U.S. disk, removable hard disk, magnetic diskette, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signal, telecommunications signal, and software distribution medium, etc.

While the present invention has been described in considerable detail and with particular reference to a few illustrative embodiments thereof, it is not intended to be limited to any such details or embodiments or any particular embodiments, but it is to be construed as effectively covering the intended scope of the invention by providing a broad, potential interpretation of such claims in view of the prior art with reference to the appended claims. Furthermore, the foregoing describes the invention in terms of embodiments foreseen by the inventor for which an enabling description was available, notwithstanding that insubstantial modifications of the invention, not presently foreseen, may nonetheless represent equivalents thereto.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and the present invention shall fall within the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means. The invention is capable of other modifications and variations in its technical solution and/or its implementation, within the scope of protection of the invention.

Claims

1. The utility model provides a collection ETC detains RSU equipment of fee, traffic flow control and big dipper location which characterized in that includes following:

the power supply module is used for supplying power to the RSU equipment;

the MCU service processing module comprises a MCU service processing module,

the traffic flow monitoring unit is used for carrying out information interaction with the vehicle-mounted unit through the 5.8G module, acquiring vehicle information to carry out traffic flow data acquisition and uploading the traffic flow data to the server,

2. The RSU device integrated with ETC fee deduction, vehicle flow monitoring and Beidou positioning according to claim 1, is characterized in that the power module comprises a voltage conversion unit, the voltage conversion unit is used for converting 24V direct current voltage into voltage required by each module, and the power module provides 3A working current.

3. The RSU device integrating ETC fee deduction, traffic flow monitoring and Beidou positioning as claimed in claim 1, wherein specifically, the 5.8G module comprises a transmitting/receiving array antenna, a transmitting/receiving amplifying circuit and a 5.8G receiver, the 5.8G module is used for carrying out wireless communication with an on-board unit, transmitting and receiving 5.8G signals and realizing conversion from analog signals to digital signals, the 5.8G module is provided with two DSRC channels, and physical layer parameters meet part 1 of short-range communication special for GBT 20851.1-2019 electronic toll collection: physical layer >; the DSRC data protocol packet meets the 2 nd part of the short-range communication special for GB/T20851.2-2019 electronic charging: data link layer requirements.

4. The RSU device integrating ETC fee deduction, traffic flow monitoring and Beidou positioning according to claim 1 is characterized in that the 2G/4G wireless network module comprises a 2G/4G module and an LTE/GPRS antenna, the 2G/4G wireless network module is used for being connected with a 2G/4G network to achieve network data transmission, after the 2G/4G wireless network module is powered on, network searching and SIM card searching are automatically completed, and after network connection is stable, the RSU device can be connected with a server through the 2G/4G wireless network module and starts to perform information interaction with the server.

5. The RSU device integrating ETC fee deduction, vehicle flow monitoring and Beidou positioning according to claim 1, wherein the position information obtaining unit is further used for,

after the positioning information of the Beidou positioning module is obtained, redundant filtering processing is also carried out on the positioning information so as to remove the static drifting condition possibly existing in the positioning information, and after the redundant filtering processing is finished, the final positioning information is uploaded to a server.

6. The RSU device integrating ETC fee deduction, traffic flow monitoring and Beidou positioning according to claim 1, wherein the MCU service processing module further comprises,

7. The RSU device integrating ETC fee deduction, traffic flow monitoring and Beidou positioning according to claim 1, wherein the MCU service processing module further comprises,

8. The RSU device integrating ETC toll collection, traffic flow monitoring and Beidou positioning according to claim 1, further comprising,

9. A system based on the RSU equipment integrating the ETC fee deduction, the traffic flow monitoring and the Beidou positioning, which is characterized in that the RSU equipment integrating the ETC fee deduction, the traffic flow monitoring and the Beidou positioning in any one of the claims 1 to 7 is applied, and comprises,

10. The system of the RSU device based on the ETC fee deduction, the traffic monitoring and the Beidou positioning according to the claim 9, wherein the server performs the traffic abnormity early warning according to the traffic information, comprising the following steps,

predicting a plurality of instantaneous vehicle flows in the time range of the next period (t + NT, t +2 NT) by the vehicle flow standard line, wherein the predicting mode is as follows: