CN210515384U

CN210515384U - Vehicle-mounted unit management system and vehicle-mounted unit

Info

Publication number: CN210515384U
Application number: CN201921668245.6U
Authority: CN
Inventors: 孙占; 崔英磊
Original assignee: Shenzhen Genvict Technology Co Ltd
Current assignee: Shenzhen Genvict Technology Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-05-12
Anticipated expiration: 2029-09-30

Abstract

The utility model provides an on-vehicle unit management system and on-vehicle unit adopts the integrated NB-IOT module that has the locate function to carry out network communication, is convenient for upload on-vehicle unit's state data, makes the backstage can be convenient master on-vehicle unit's state and data such as locating information to NB-IOT module power consumption is low, has reduced the degree of dependence to the battery. In addition, the power supply input interface is adopted to obtain the electric energy provided by the outside to supply power to the vehicle-mounted unit, so that the dependence degree of the vehicle-mounted unit on the battery is reduced, and the function expansion of the vehicle-mounted unit can be enriched, for example, the additionally arranged image acquisition module can be used for photographing or recording, and the information of the scene where the vehicle-mounted unit is located can be conveniently mastered.

Description

Vehicle-mounted unit management system and vehicle-mounted unit

Technical Field

The invention relates to the technical field of intelligent traffic, in particular to a vehicle-mounted unit management system and a vehicle-mounted unit.

Background

The structural block diagram of a rear-mounted OBU (on-board unit) used in a current Electronic Toll Collection (ETC) system is shown in fig. 1, and the OBU comprises a main control unit, a 5.8GHz radio frequency unit, a 13.56MHz read-write card module, an encryption unit, a 2.4G bluetooth module and a whole-machine power supply system. The power supply system adopts the scheme of 'solar energy + backup battery + energy storage element' to supply power to the system. The 5.8GHz radio frequency unit, the 13.56MHz card reading unit and the encryption unit are mainly used for completing ETC transaction fee deduction. When the system is required to be issued and activated or the card is required to be stored and the value is required to be stored for the user, the 2.4GHz Bluetooth module is connected with the mobile phone for operation. The network connection of the vehicle-mounted unit is connected with the mobile phone through the Bluetooth module, and the mobile phone is manually accessed into the network, so that the tag state information or other passing information cannot be actively uploaded in real time, and the abnormal state of the tag when passing cannot be monitored. According to the past repair data of returned goods, nearly 60-70% of returned goods cannot be found out when being returned to a factory for maintenance, and the problems of field conditions and abnormal data when passing is abnormal are difficult to locate because the abnormal data cannot be stored, so that the processing difficulty of the returned goods is increased, and the maintenance cost is increased. Meanwhile, in the rapid development of the internet of things, function expansion and service upgrading are performed through networking, and the development trend and the development requirement of the ETC industry are met. In addition, the common rear-mounted label is powered by a battery, so that long-time connection and information transmission between the Bluetooth and the mobile phone cannot be realized, otherwise the service life of the whole machine is influenced, and the application expansion of the Bluetooth function is limited.

Disclosure of Invention

The vehicle-mounted unit management system and the vehicle-mounted unit are convenient for a background to master information of the vehicle-mounted unit.

According to a first aspect, an embodiment provides an on-board unit, including a radio frequency module, a read-write card module, and an encryption module; the radio frequency module, the read-write card module and the encryption module are used for completing transaction fee deduction through cooperation; the on-board unit further includes:

the power supply module comprises a power supply input interface and/or a standby battery, the power supply module acquires electric energy provided by the outside through the power supply input interface and uses the electric energy for supplying power to the vehicle-mounted unit, and the standby battery is used as a standby power supply for supplying power to the vehicle-mounted unit;

the NB-IOT module is integrated with a positioning function and is used for network communication;

the image acquisition module is used for photographing or recording;

and the main control module is used for controlling the working process of the vehicle-mounted unit and uploading the state data of the vehicle-mounted unit through the NB-IOT module.

In the vehicle-mounted unit, the image acquisition module comprises a camera and a memory; the camera shoots or records the pictures under the triggering of the transaction abnormal signal, and the pictures or videos obtained by shooting or recording are stored in the memory.

In the vehicle-mounted unit, the image acquisition module is an automobile data recorder.

The vehicle-mounted unit further comprises a mechanical anti-dismantling module, wherein the mechanical anti-dismantling module is electrically connected with the main control module and used for sending a dismantling signal when the vehicle-mounted unit is dismantled, so that the main control module stops transaction fee deduction.

In the vehicle-mounted unit, the power supply module is electrically connected with the main control module; the power supply module and the main control module are electrically connected with the radio frequency module, the read-write card module, the encryption module, the NB-IOT module, the image acquisition module and the mechanical anti-dismantling module.

In the vehicle-mounted unit, the power supply input interface comprises at least one of a standard USB interface, a Mini-USB interface, a Micro-USB interface and a Type-C interface.

The vehicle-mounted unit further comprises a shell and a main board arranged in the shell; the main control module is installed on the mainboard, the NB-IOT module is connected with the mainboard through a flexible circuit board, and the main control module is in serial port communication with the NB-IOT module.

In the vehicle-mounted unit, the main control module comprises an MCU chip and is used for turning off the power supply of the NB-IOT module when the standby battery supplies power and the voltage of the standby battery is lower than a preset value.

The vehicle-mounted unit also comprises an alarm module which is used for giving out sound, light or electric signals to give an alarm when the vehicle-mounted unit is abnormal.

According to a second aspect, an embodiment provides an on-board unit management system, comprising a server, and one or more on-board units as described above; the server is in communication connection with the vehicle-mounted units and is used for receiving data uploaded by the NB-IOT modules of the vehicle-mounted units and responding according to the received data.

According to the vehicle-mounted unit management system and the vehicle-mounted unit, the NB-IOT module integrated with the positioning function is used for network communication, so that the state data of the vehicle-mounted unit can be uploaded conveniently, a background can conveniently master the data such as the state of the vehicle-mounted unit, positioning information and the like, the power consumption of the NB-IOT module is low, and the dependence degree on a battery is reduced. In addition, the power supply input interface is adopted to obtain the electric energy provided by the outside to supply power to the vehicle-mounted unit, so that the dependence degree of the vehicle-mounted unit on the battery is reduced, and the function expansion of the vehicle-mounted unit can be enriched, for example, the additionally arranged image acquisition module can be used for photographing or recording, and the information of the scene where the vehicle-mounted unit is located can be conveniently mastered.

Drawings

FIG. 1 is a block diagram of a conventional on-board unit;

FIG. 2 is a block diagram of an embodiment of an on-board unit management system provided by the present invention;

FIG. 3 is a block diagram of an embodiment of an on-board unit provided by the present invention;

fig. 4 is a block diagram of an application system implemented based on the on-board unit provided in the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.

The terms used in the present invention define or introduce:

ETC (electronic Toll collection) electronic Toll collection system is an automatic Toll collection system for expressways or bridges. The special short-range communication is carried out between the vehicle-mounted electronic tag (vehicle-mounted unit) arranged on the windshield of the vehicle and the microwave antenna (road side unit) on the ETC lane of the toll station, and the computer networking technology and the bank are utilized to carry out background settlement processing, so that the purpose that the vehicle can pay the toll of the expressway or the bridge without parking through the expressway or the bridge toll station is achieved.

An OBU (abbreviated as On board Unit), which is called as an On-board Unit in the Chinese language, is a microwave device that communicates with a Road Side Unit (RSU-Road Side Unit, RSU for short) by using dsrc (dedicatedsort Range communication) technology. In the ETC system, an on-board unit is placed on a vehicle, and roadside units are erected on the roadside and communicate with each other through microwaves. When the vehicle passes through the road side unit at a high speed, the vehicle-mounted unit and the road side unit are communicated by microwave to identify the truth and the falsity, obtain the vehicle type, calculate the rate and deduct the toll.

The narrowband Internet of Things (Narrow Band Internet of Things, NB-IoT) becomes an important branch of the Internet of everything. The NB-IoT is constructed in a cellular network, only consumes about 180kHz bandwidth, and can be directly deployed in a GSM network, a UMTS network or an LTE network so as to reduce the deployment cost and realize smooth upgrading.

GNSS, global navigation satellite systems, such as GPS, beidou, and other positioning systems.

According to the invention, the NB-IOT module with a positioning function is added in the on-board unit (OBU) to replace a Bluetooth module, and the on-board unit is accessed to the network, so that real-time uploading of traffic information and abnormal label states of vehicles and collection of large data such as vehicle traffic can be realized. The equipment manufacturer can monitor the state (label state) of the vehicle-mounted unit through the background server, locks an abnormal label through the processing and analyzing of the background server on data, sends an instruction to prompt that the label state is abnormal to abnormal terminal equipment, and informs a vehicle owner to process the abnormal label state in time. Meanwhile, the vehicle-mounted unit is accessed to the network, and can be remotely upgraded and maintained, so that convenience is provided for the passing of users, and the function upgrade, the application upgrade and the service upgrade of the vehicle-mounted unit are realized.

As shown in FIG. 2, the on-board unit management system provided by the present invention includes a server 20, and one or more on-board units 10. The server 20 is connected with the vehicle-mounted units 10 in a communication mode, and the server 20 is used for receiving data uploaded by the NB-IOT modules of the vehicle-mounted units 10 and responding according to the received data.

Referring also to fig. 3, the on-board unit includes: the system comprises a power supply module 110, a main control module 120, a mechanical anti-disassembly module 130, a radio frequency module 140, a read-write card module 150, an encryption module 160, an NB-IOT module 170 integrated with a positioning function and an image acquisition module 180.

The rf module 140, the card reader 150 and the encryption module 160 are configured to cooperate with each other to complete a transaction fee deduction of the ETC. For example, the rf module 140 employs a 5.8GHz rf module for rf communication with a roadside unit of the ETC. The card read/write module 150 uses a 13.56MHz module to implement data write and read functions. The signal received by the 13.56MHz antenna of the 13.56MHz module may also be used as an excitation signal to wake up the master control module 120. The encryption Module 160 adopts an ESAM Module (Embedded Secure Access Module), and the Chinese name is an Embedded security control Module, which is used for performing mutual authentication with the road side unit, storing system and vehicle information, and ensuring safe and reliable transaction. The radio frequency module 140, the read-write card module 150, and the encryption module 160 cooperate to complete the fee deduction of the ETC transaction, which is the prior art and will not be described herein.

The power supply module 110 includes a power supply input interface 111 and/or a backup battery 112. That is, in an alternative embodiment, only the power input interface 111 is used to power the on-board unit, and in another alternative embodiment, only the battery 112 is used to power the on-board unit. The present embodiment is described by taking the power supply module 110 including the power supply input interface 111 and the backup battery 112 as an example. The power supply input interface 111 acquires power supplied from the outside and uses it to supply power to the on-vehicle unit. The backup battery 112 serves as a backup power source for supplying power to the on-board unit. The power input interface 111 is also used to obtain power supplied from the outside and to charge the backup battery 112. The power supply input interface 111 and the backup battery 112 are electrically connected to the main control module 120, the mechanical tamper module 130, the radio frequency module 140, the read/write card module 150, the encryption module 160, the NB-IOT module 170, and the image acquisition module 180 to supply power thereto, as shown by the dotted line in fig. 3, the dotted line in fig. 3 represents a power supply line, and the solid line represents a line for signal or data transmission. The backup battery 112 is a rechargeable lithium ion battery. In the prior art, a solar battery is adopted for supplying power, so that the limitation is extremely large in practical terms, the solar battery is limited by weather and environment, a standby battery can be only used temporarily, so that a vehicle-mounted unit cannot use a functional module with high power consumption, a Bluetooth module belongs to luxury, and a functional module with network communication capacity consumes more power, so that the vehicle-mounted unit does not have the functional module for network communication. The invention adopts the power supply input interface 111 to supply power for the vehicle-mounted unit, breaks the conventional thinking and provides possibility for enriching the functions of the vehicle-mounted unit 10. The power input interface 111 includes at least one of a standard USB interface, a Mini-USB interface, a Micro-USB interface, and a Type-C interface.

The NB-IOT module 170 is configured to communicate with the server 20 through a network, upload the status data of the on-board unit output by the main control module 120 to the server 20, and receive an instruction or data issued by the server 20. The vehicle-mounted unit 10 realizes communication with the background server 20 through the NB-IOT module 170, so that the background can conveniently grasp information of the vehicle-mounted unit, and remote management and control of the vehicle-mounted unit 10 are realized.

In this embodiment, the NB-IOT module 170 may be an NB/GNSS wireless communication module. The NB-IOT module 170 has three modes of operation: PSM (Power Saving Mode), DRX (Discontinuous Reception Mode), and eDRX (Extended DRX). In the PSM mode, the NB-IOT module 170 sleeps deeply during the non-service period, does not receive downlink Data, and can receive downlink Data cached by the IOT platform only when the NB-IOT module 170 actively transmits uplink Data (MO Data), which is suitable for services without a delay requirement on the downlink Data; the NB-IOT module 170 consumes very little power in this mode. In the DRX mode, the downlink traffic can reach the NB-IOT module 170 at any time, that is, data sent by the server 20 is received at any time, and in each DRX cycle (1.28s, 2.56s, 5.12s, or 10.24s), the NB-IOT module 170 detects whether the downlink traffic arrives at a time, which is suitable for a traffic with a high requirement on delay. The eDRX mode can give consideration to both low power consumption and traffic having a certain requirement on latency, in each eDRX cycle, only within a set paging time window, the NB-IOT module 170 can receive downlink data, and the NB-IOT module 170 is in a sleep state in the rest of the time, and does not receive downlink data, and this mode can balance between the downlink traffic latency and power consumption.

Because current on-vehicle unit needs pass through the cell-phone networking, can't pass data and label state information voluntarily, simultaneously because power supply system adopts solar cell power supply, can't guarantee the long-time work of bluetooth. The NB-IOT module 170 is adopted to replace a 2.4GHz Bluetooth module, so that the networking of the vehicle-mounted unit is realized. The NB-IOT module 170 has the greatest advantage over other communication modules, such as 2G/GPRS/3G/4G, in having the PSM operation mode, and at the same time, has the advantage of low cost. And as the 2G network is gradually closed and the NB network is gradually improved, the advantages of the vehicle-mounted unit adopting the NB communication mode are more and more prominent. The NB-IOT module 170 consumes power only at the uA level in PSM mode, and even for battery-powered on-board units, the power consumption is small and has little impact on tag life.

The image acquisition module 180 is used for taking pictures or recording videos.

The mechanical anti-tamper module 130 is configured to send a removal signal when the on-board unit 10 is removed, so that the main control module 120 stops transaction charging, i.e., disables at least one of the rf module 140, the card reader module 150 and the encryption module 160, thereby avoiding property loss of a user. The mechanical tamper module 130 ensures that even if the on-board unit is removed, the security of the funds on the user card is not compromised. The mechanical anti-tamper module 130 may specifically adopt an anti-tamper switch, such as a non-self-locking switch, where the non-self-locking switch is in a powered loop, and the switch is flipped open after the on-board unit is removed, and the loop is disconnected, so as to generate an electrical signal to the main control module 120, and the main control module 120 may determine that the on-board unit is detached, stop the transaction function, start an alarm prompt, and the like.

The main control module 120 is electrically connected to the mechanical anti-tamper module 130, the radio frequency module 140, the read/write card module 150, the encryption module 160, the NB-IOT module 170, and the image acquisition module 180, and is configured to control a workflow of the on-board unit 10, and upload status data of the on-board unit 10 through the NB-IOT module 170. The main control module 120 may be a single chip or an MCU chip. The status data includes location data of the NB-IOT module 170, abnormal data, normal or abnormal status of the on-board unit, and the like. The on-board unit 10 is defaulted to normal when no abnormal data is generated. The rf module 140, the card read/write module 150, and the encryption module 160 may all be abnormal during operation, which may result in transaction failure, and the result of transaction failure and the data generated by the rf module 140, the card read/write module 150, and the encryption module 160 during the process of the failed transaction all belong to abnormal data. Of course, the signal output by the mechanical tamper module 130 also belongs to the abnormal data when the on-board unit 10 is removed. The server 20 can know the state of the on-board unit 10 after obtaining the abnormal data, so as to control and manage the on-board unit 10.

In one embodiment, the image acquisition module includes a camera and a memory. The camera shoots or records the pictures under the triggering of the transaction abnormal signal, and the pictures or videos obtained by shooting or recording are stored in the memory. The transaction exception signal is a signal indicative of a failure of a transaction. The camera does not work when the vehicle-mounted unit works normally, and only takes pictures or records videos when the transaction fails, so that electric energy is effectively saved. In an alternative embodiment, the on-board unit further comprises an alarm module for emitting an acoustic, optical or electrical signal to alarm when the on-board unit 10 is abnormal, the alarm module may be a buzzer or an indicator light.

In this embodiment, the image acquisition module 180 is a vehicle event data recorder, which has at least a camera and a memory. The arrangement of the image acquisition module 180 facilitates the root cause of the later positioning of the abnormal passing of the labels. When the tag transaction is abnormal, the main control module 120 transmits the abnormal transaction data to the background server 20 through the NB-IOT module 170, and controls the vehicle event data recorder to capture the abnormal transaction data, record the detailed information of the passage site, and latch the detailed information to the local. After the vehicle-mounted unit 10 is accessed to the network through the NB-IOT module 170, the prior social issue and recharge functions can be compatible, and the state information and the traffic information of the tag can be uploaded in real time. Meanwhile, the positioning function of the NB-IOT module 170 can be utilized to realize the extended functions of vehicle positioning, one-key rescue, passing path identification and the like, so that multiple functions of one machine are really realized, and convenience is brought to users. When the power supply input interface 111 supplies power to the vehicle-mounted unit 10, the NB-IOT module 170 is in a working state, and the NB-IOT module 170 uploads data in real time; when the vehicle is shut down, the power supply input interface 111 stops supplying power because the power cannot be obtained, the power supply input interface 111 enters a PSM mode, and the transmission frequency of data is adjusted according to the service requirement.

The on-board unit 10 further includes a housing (not shown in the drawings) and a main board (not shown in the drawings) provided in the housing; the main control module 120 is installed on a motherboard, and the NB-IOT module 170 is connected to the motherboard via a Flexible circuit board (FPC for short). The main control module 120 communicates with the NB-IOT module 170 via a serial port to control the NB-IOT module 170. The power circuit of the NB-IOT module 170 is controlled by the main control module 120, and the main control module 120 is further configured to turn off the power of the NB-IOT module 170 when the backup battery 112 supplies power and the voltage of the backup battery is lower than a preset value, so as to save power and ensure the use of the on-board unit ETC function. The main control module 120 is further configured to switch the operating mode of the NB-IOT module 170 to the DRX mode under the trigger of the vehicle-mounted unit abnormal signal, switch to the eDRX mode after the NB-IOT module 170 finishes uploading the status data, and switch the NB-IOT module 170 to the PSM mode after the eDRX mode lasts for a preset time.

Therefore, the vehicle-mounted unit provided by the invention can complete other function expansion through the NB-IOT module networking besides the compatibility with the previous social issue and online recharge functions: for example, uploading abnormal state information of the tag, including but not limited to the anti-detachment state of the tag, and related information of the transaction abnormal state occurring in the tag transaction process. The equipment manufacturer can track specific equipment on a specific vehicle for maintenance according to the information, and the after-sale service efficiency and the after-sale service quality are greatly improved. Meanwhile, the equipment manufacturer can analyze the collected big data of the abnormal state of the label transaction, and reference and guidance are provided for the optimization and upgrading of the products in the later period. The positioning function of the NB-IOT module can be utilized to realize one-key rescue, the existing one-key rescue function needs to be realized through communication and positioning functions, but the general communication module and the GPS/Beidou module are difficult to integrate into an OBU due to power consumption and volume problems. The NB-IOT module integrates communication and positioning functions, positioning accuracy within a range of 50m can be realized by using an OTDOA (observed time difference of arrival) technology, and the power consumption of the NB-IOT module is extremely low. Therefore, one-key rescue of the OBU can be realized after the OBU is installed.

Due to the vehicle-mounted unit provided by the invention, an application system is shown in a block diagram in fig. 4, a network part and a connection management platform of the whole system are well established, and the network management of the OBU and the collection of ETC big data can be completed only by developing a top-level application system according to requirements, so that the management of a background server on the vehicle-mounted unit is greatly facilitated.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. A vehicle-mounted unit comprises a radio frequency module, a read-write card module and an encryption module; the radio frequency module, the read-write card module and the encryption module are used for completing transaction fee deduction through cooperation; characterized in that said on-board unit further comprises:

the image acquisition module is used for photographing or recording;

2. The on-board unit of claim 1, wherein the image acquisition module comprises a camera and a memory; the camera shoots or records the pictures under the triggering of the transaction abnormal signal, and the pictures or videos obtained by shooting or recording are stored in the memory.

3. The on-board unit of claim 1, wherein the image acquisition module is a tachograph.

4. The on-board unit of claim 1, further comprising a mechanical tamper module electrically connected to the master module for signaling a removal when the on-board unit is removed to stop the transaction debit.

5. The on-board unit of claim 4, wherein the power module is electrically connected to a master control module; the power supply module and the main control module are electrically connected with the radio frequency module, the read-write card module, the encryption module, the NB-IOT module, the image acquisition module and the mechanical anti-dismantling module.

6. The on-board unit of claim 1, wherein the power input interface comprises at least one of a standard USB interface, a Mini-USB interface, a Micro-USB interface, and a Type-C interface.

7. The on-board unit according to claim 1, characterized by further comprising a housing and a main board provided in the housing; the main control module is installed on the mainboard, the NB-IOT module is connected with the mainboard through a flexible circuit board, and the main control module is in serial port communication with the NB-IOT module.

8. The on-board unit of claim 1, wherein the main control module comprises an MCU chip configured to turn off power to the NB-IOT module when the backup battery is supplying power and the voltage of the backup battery is below a predetermined value.

9. The on-board unit of claim 1, further comprising an alarm module for emitting an acoustic, optical or electrical signal to alarm when the on-board unit is abnormal.

10. An on-board unit management system, comprising a server, and one or more on-board units according to any one of claims 1-9; the server is in communication connection with the vehicle-mounted units and is used for receiving data uploaded by the NB-IOT modules of the vehicle-mounted units and responding according to the received data.