CN210324594U - Composite pass card and road condition real-time publishing system - Google Patents

Abstract

The utility model discloses a compound pass card and road conditions real-time issuing system who uses this compound pass card. The composite access card comprises a control module, a wireless communication module and an output module, wherein the wireless communication module and the output module are both connected to the control module, and the wireless communication module is used for receiving road-side unit-sent road-related prompt information; the output module is used for outputting prompt information based on the road related prompt information received by the wireless communication module. Therefore, the composite access card provides road related prompt information to the user (driver) in real time, so that the user can decelerate or stop in time when an emergency occurs, and accidents are avoided.

Description

Composite pass card and road condition real-time publishing system

Technical Field

The disclosure relates to the field of intelligent transportation, in particular to a composite pass card and a road condition real-time issuing system using the same.

Background

The compound access card of the expressway is also called a CPC card, and the CPC card can identify the information of the vehicles entering and leaving the toll station, accurately record the actual driving path of the vehicles and provide important basis for charging and clearing the cross-provincial toll and the like.

On a real expressway, a CPC card commonly issued at present mainly has a function of recording vehicle running path information sent by a roadside unit at the roadside, and settlement is performed at a high-speed exit according to the path information and entrance and exit information. The CPC card has no interaction with the driver throughout the process. However, vehicles on the highway have high driving speed and high requirements on the response time of drivers, and when an emergency occurs in a road condition, the drivers often cannot decelerate or stop in time, so that traffic accidents are frequent, and great casualties and property loss are brought.

Therefore, there is a need for an improved composite transit card and real-time road condition distribution system.

SUMMERY OF THE UTILITY MODEL

The object of the present disclosure is to provide a composite pass card and a real-time road condition issuing system using the same to prompt and/or warn a user about road conditions through interaction, such as sound or vision, with a driver, thereby enabling the driver to decelerate or stop in advance in an emergency.

According to one aspect of the disclosure, a composite access card is provided, which includes a control module, a wireless communication module and an output module, wherein the wireless communication module and the output module are both connected to the control module, and the wireless communication module is used for receiving road-side unit-sent road-related prompt information; the output module is used for outputting prompt information based on the road related prompt information received by the wireless communication module.

Optionally, the composite access card may further include: and the awakening module is connected to the control module and awakens the control module in response to receiving an awakening signal from the road side unit, and the control module starts the wireless communication module after being awakened so as to receive road related prompt information sent by the road side unit.

Optionally, the wake-up module is periodically turned on to receive a signal sent by the roadside unit, and determines whether the signal wakes up the signal or not when the signal is received.

Optionally, the composite access card may further include: and the storage module is contained in the control module or connected to the control module and is used for storing the road-related prompt information received by the wireless communication module, and the output module outputs the prompt information based on the road-related prompt information stored in the storage module.

Optionally, the output module comprises at least one of: an audio module; one or more indicator lights; and a display screen.

Optionally, the audio module is disposed remotely from the wireless communication module; and/or

The audio module and the wireless communication module are respectively arranged on two opposite sides of the circuit board; and/or the audio module employs a complete audio ground plane, isolated from the surrounding ground plane; and/or the audio module wire adopts a differential signal or false differential signal mode.

Optionally, the composite access card may further include: the first power supply module is used for supplying power to other modules except the audio module; and the second power supply module is independent of the first circuit module and is used for supplying power to the audio module.

Optionally, the audio module includes an audio player, and the housing of the composite access card includes: an audio output slot facing the audio player to output sound to the outside; and/or one or more indicator light apertures for said one or more indicator lights, respectively; and/or a fixing device for mounting the display screen.

Optionally, the rear part of the audio player is tightly attached to the circuit board to form a closed structural rear sound cavity; and/or a space is reserved between the front part of the audio player and the audio output groove to form a front sound cavity; and/or the audio output sink comprises a plurality of sound outlet apertures, the ratio of the total area of the plurality of sound outlet apertures to the diaphragm area of the audio player being about 30%; and/or a waterproof and dustproof net is arranged between the front sound cavity and the audio output groove.

According to another aspect of the present disclosure, there is provided a road condition real-time publishing system, including: a composite access card according to the above; and the road side unit is arranged at the road side and used for receiving the road related prompt information and sending an activation signal and the road related prompt information to the composite access card nearby.

Therefore, the composite access card (CPC card) is added with a voice broadcast function and/or an LED flashing function or can be fused with a plurality of reminding modes, interaction can be formed between the CPC card and a driver in sound and/or vision, and the defect that the traditional CPC card does not have any interaction with the driver is overcome. Moreover, the composite access card has the functions of recording and feeding back the road related prompt information, can perform voice broadcast in real time according to different road conditions, can control the change of the color and the flashing mode of the LED, and can overcome the defect that the traditional CPC card does not have any recording and feeding back on the road conditions.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in greater detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.

FIG. 1 shows a schematic structural diagram of a composite access card according to one embodiment of the present disclosure.

FIG. 2 shows a schematic block circuit diagram of a composite pass card according to one embodiment of the present disclosure.

FIG. 3 shows a circuit board design schematic of a composite access card according to one embodiment of the present disclosure.

FIG. 4 shows a schematic exterior view of a composite access card according to one embodiment of the present disclosure.

Fig. 5 shows a block diagram of an audio player according to one embodiment of the present disclosure.

Detailed Description

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As described above, the conventional CPC card is generally issued to a driver of a vehicle when the vehicle enters an entrance of a highway, and is periodically waken up by a road side unit disposed on one side of the road during the driving of the vehicle, and records path information transmitted from the road side unit. Thus, at the high-speed exit, the settlement can be performed according to the path information and the entrance/exit information recorded on the CPC card. In some cases, the roadside unit may also be referred to as a "base station. The road side units may have, for example, communication capabilities and edge computing capabilities.

The conventional CPC card has at least the following disadvantages:

1. the conventional CPC card is only used for passively recording the driving path information of the vehicle, the CPC card has no interaction with a driver all the time, and the driver cannot know the specific recorded information.

2. The information recorded by the conventional CPC card is only the vehicle running path information and the information of telling the entrance and exit. The CPC card cannot record any information related to real-time road conditions, has no effect on emergency situations possibly occurring on the expressway, and cannot give any road condition prompt or danger warning to vehicles running on the expressway.

In view of this, this disclosure provides a novel compound access card, through increasing voice broadcast function and/or LED scintillation function or fusing the prompt facility of multiple warning mode for traditional CPC card to in-process and driver interaction through voice broadcast are gone to the vehicle, and remind the driver through lighting different LED lamps.

In addition, this compound current card of this disclosure still has the function of the relevant suggestion information record of road and feedback, can combine the trackside unit of intelligent perception, conveys the relevant suggestion information of road in advance to novel CPC card to carry out voice broadcast in real time according to the road conditions of difference, and can control the change of LED colour and scintillation mode, thereby inform the driver to encounter emergency and slow down or park in advance.

In the embodiment of the present disclosure, the road-related prompt information may include any prompt information related to a driving behavior of a vehicle or a vehicle running on a road, for example, and may include at least one of the following: security assistance class information; high-efficiency traffic auxiliary information; and service class information.

The security assistance type information may include, for example, at least one of: driving blind area information; collision warning information between vehicles; collision prevention early warning information of the vulnerable participants (for example, collision early warning of the vulnerable traffic participants such as pedestrians); cooperative management and control information (such as lane keeping prompt, speed limit early warning, driving speed suggestion, traffic light information prompt and traffic rule prompt); and (4) road abnormity reminding (such as curve early warning, road danger condition reminding, construction section reminding, road surface spill reminding, road surface unevenness reminding and roadside danger condition early warning).

The efficient traffic class assistance information may include, for example: the system comprises a traffic jam reminding device, an emergency vehicle reminding device (such as an ambulance), an emergency vehicle avoidance early warning device, lane load balancing information, a ramp incoming and outgoing reminding device, a motorcade avoidance reminding device and the like.

The service class information may include, for example: abnormal weather reminding, vacant parking space guiding, frequent payment of intelligent automobiles and the like.

In other embodiments, the road-reminder related information may further include, for example, at least one of: road condition information; pedestrian information and/or animal information; vehicle travel route information; vehicle driving precautions; traffic identification information; and transportation facility information.

The traffic information may include, but is not limited to, any of the following: road congestion information; traffic accident information; traffic control information; road construction information; road weather information; road surface condition information (depressed pits, accumulated water, accumulated snow and ice) and the like.

The pedestrian information and/or animal information may include, for example, information of pedestrians and/or animals (e.g., grazing persons and livestock) passing or staying on a road.

The vehicle travel route information may include, for example, driving planning information, and may include, for example, intersection turning information in front of the vehicle. The driving planning information may also be formulated or adjusted based on the acquired road condition information, for example.

The vehicle driving notice may include, for example, a notice related to a road condition ahead, and may include, for example, a forward speeding camera notice or the like. The vehicle driving notice may be, for example, a notice related to the acquired road condition information.

The traffic sign information may include, for example, a turn sign, a speed limit sign, a direction sign, etc., based on the collected information.

The traffic facility information may include, for example, information about infrastructure such as fences, lighting facilities, road mirrors, violation cameras, speed probes, signal lights, etc. disposed on the road.

It should be understood that the above description is only an illustration and not a limitation of the prompt information related to the road or the driving behavior of the vehicle or the like running on the road, and the road-related prompt information distribution scheme of the present disclosure is suitable for any form of road information and/or prompt information, and the present disclosure is not limited thereto.

The novel composite access card of the present disclosure will be described in detail below with reference to the accompanying drawings and examples.

FIG. 1 shows a schematic structural diagram of a composite access card according to one embodiment of the present disclosure. FIG. 2 shows a schematic block circuit diagram of a composite pass card according to one embodiment of the present disclosure.

As shown in fig. 1, the composite access card 100 of the present disclosure may include a control module 110, a wireless communication module 120, and an output module 130. The wireless communication module 120 and the output module 130 may be connected to the control module 110 and may perform corresponding operations in response to control of the control module 120.

Referring to the schematic diagram shown in fig. 2, the control module 110 of the present disclosure may be, for example, a Micro Control Unit (MCU)201, and may perform relevant response processing during the operation of the composite transit card, such as receiving road-side related prompt information sent by a road-side unit (i.e., a road-side device), broadcasting a prompt based on the road-side related prompt information, controlling an LED lamp to flash based on the road-side related prompt information, and the like.

The wireless communication module 120 shown in fig. 1 may correspond to, for example, the 5.8GHz transceiver circuit 202 shown in fig. 2. The wireless communication module 120 may communicate with the rsu and may receive information transmitted by the rsu, such as route information, road-related hints information, or other information.

The output module 130 may output the prompt information based on the road-related prompt information received by the wireless communication module.

The prompting form of the composite access card 120 can include, but is not limited to, sound, vibration, light, and image. Based on different prompt forms, corresponding output modules, such as an audio player, a vibrator, one or more indicator lights, a display screen, and the like, may be disposed on the composite access card, which is not limited in this disclosure. According to the received road related prompt information, the composite pass card can prompt through voice broadcasting or vibration or an indicator light or the fusion of the three.

The output module may have various forms corresponding to different prompting modes, and may output the prompting information in one or more modes.

For example, the output module 130 may include an audio module, which may include various forms of audio players (such as the audio player 204 shown in fig. 2) such as an audio amplifier circuit (such as the audio amplifier circuit 203 shown in fig. 2), a speaker, a buzzer, and the like.

The output module 130 may also include one or more LED indicator lights (e.g., LED indicator light 205 shown in fig. 2), and different indicator lights may have different configuration parameters, such as color, on/off, flashing (fast flashing, slow flashing, etc.). Different combinations of indicator lights may each represent different information. The control module can respectively control the flickering of the plurality of indicator lights according to the received road-related prompt information so as to express information corresponding to the group of indicator lights, such as the danger level of the road ahead, to the user.

The output module can also comprise a display screen, and prompt information corresponding to the front road condition can be schematically displayed according to the received road related prompt information. Alternatively, the composite access card may be connected to other devices having a display screen to output a prompt to the user via the display screen of the other device.

It should be understood that the above description is only an illustrative example and not a limitation to the output module and the output mode of the prompt message of the present disclosure, and the present disclosure does not limit the form of the output module and the output mode of the prompt message.

In other embodiments, the composite access card of the present disclosure may further have other functional modules to assist in the implementation of the functions of the control module, the wireless communication module, or the output module.

In conjunction with the schematic diagram shown in fig. 2, in one embodiment, the composite access card of the present disclosure may have a power module (e.g., corresponding to the battery 207 shown in fig. 2) to respectively provide power to some of the functional modules of the composite access card.

According to the arrangement of different modules of the composite access card and the required electric quantity realized by the functions of the different modules, one or more power supply modules can be provided to respectively provide the required electric quantity for different other modules. For example, if the power consumption of the audio module is large, the first power module may supply power to other modules except the audio module, and the second power module independent from the first power module may supply power to the audio module. The first power module and the second power module may be the same power module, and have the same electric quantity, size, and the like.

From this, provide great electric quantity for the great audio module of power consumption to make first power module and second power module, can provide the electric quantity for each module of compound pass card comparatively uniformly, in order to ensure this compound pass card's normal use.

In one embodiment, the composite pass card can include a wake-up module (which can correspond to, for example, the 5.8GHz wake-up circuit 202 shown in fig. 2) coupled to the control module.

In order to save electric energy, all the modules of the composite pass card can be in a standby state in the running process of the vehicle. After a vehicle with the composite pass card 120 enters the coverage area of the roadside unit, the roadside unit can detect the composite pass card and send a wake-up signal to the composite pass card if road-related prompt information needs to be issued. The wake-up module may wake up the control module in response to receiving a wake-up signal from a roadside unit. After being awakened, the control module may start the wireless communication module to receive the road-related prompting information sent by the road side unit.

The wake-up module may be periodically turned on to receive a signal transmitted by the road side unit, and determine whether the signal wakes up the signal when the signal is received.

The road side unit may not send a wake-up signal, or the sent signal is not used to indicate wake-up, without road related prompting information that needs to be issued. When the received signal sent by the road side unit is a non-wakeup signal, the wakeup module may not process the received signal and may not execute the response processing. When the received signal sent by the road side unit is a wake-up signal, referring to the schematic diagram shown in fig. 2, the wake-up module may wake up the microprocessor MCU through an interrupt, and then the MCU may start the wireless communication module (i.e., the 5.8GHz transceiver circuit) through a serial protocol such as SPI/I2C, for example, to receive information such as path information and road related prompt information sent by the road side unit.

It should be understood that the transceiver circuit and the wake-up circuit shown in fig. 2 of the present disclosure may respectively correspond to two channels of the wireless communication chip, and when the composite access card is in a sleep state, the wireless communication chip may receive the wake-up signal through the wake-up channel, and when the composite access card is in a wake-up state, the wireless communication chip may transmit and receive information through the transceiver channel.

In one embodiment, the composite access card may also include a memory module (e.g., which may correspond to the read-write circuit 206 shown in FIG. 2).

The storage module may be included in the control module, may also be connected to the control module, and may store the road-related prompt information received by the wireless communication module. The output module may output the prompt information based on the road-related prompt information stored in the storage module.

Referring to the schematic diagram shown in fig. 2, after receiving the information sent by the road side unit, the 5.8GHz transceiver circuit transmits the received information to the MCU, and the MCU stores the received information in a storage module (for example, a storage unit of the MCU or a storage module connected to the MCU). And then, based on the stored information, the MCU can output the prompt information to be broadcasted to the output module.

Specifically, the MCU may transmit data to be broadcast to the audio amplifier circuit, for example, via a low-speed serial interface such as I2S in the form of a digital signal, or via an analog audio output interface in the form of an analog signal. The audio amplifier circuit may convert the received digital signal into an analog signal and amplify it, or may directly amplify the received analog signal and transmit it to the audio player.

The audio player can adopt a loudspeaker or a buzzer form to broadcast voice and interact with a driver through sound. Meanwhile, the MCU can light the indicator lights with different colors according to different conditions so as to visually remind a driver.

From this, through this compound access card as above of this disclosure, through increasing voice broadcast function and/or LED scintillation function or fusing the prompt facility of multiple warning mode for traditional CPC card to the mode and the driver interaction through voice broadcast are gone through to the vehicle, and remind the driver through lighting different LED lamps. In addition, this compound current card of this disclosure still has the function of the relevant suggestion information record of road and feedback, can combine the trackside unit of intelligent perception, conveys the relevant suggestion information of road in advance to novel CPC card to carry out voice broadcast in real time according to the road conditions of difference, and can control the change of LED colour and scintillation mode, thereby inform the driver to encounter emergency and slow down or park in advance.

In some embodiments, a plurality of functional modules of the composite access card of the present disclosure may have different circuit board design structures to ensure the normal operation of each functional module.

FIG. 3 shows a circuit board design schematic of a composite access card according to one embodiment of the present disclosure.

As shown in fig. 3, for example, in order to prevent the audio playing from being interfered by the high-frequency rf signal, the composite access card of the present disclosure may set all the audio amplifying circuits, the audio player and the audio traces included in the audio module as close to each other as possible, and set the audio module away from the wireless communication module (e.g., the rf antenna).

For example, an audio module (including an audio amplification circuit and an audio player) and a wireless communication module (e.g., a radio frequency antenna) may be disposed on opposite sides of the printed circuit board, respectively, to reduce interference.

For example, an audio module (including all audio related chips and traces) may employ a complete audio ground plane, isolated from the surrounding ground plane, to isolate signal interference. Or the audio ground plane is connected with a single point of the surrounding ground, so that the coupling is reduced, and the interference is reduced.

For example, the audio trace may be wrapped completely around, forming an isolation layer on the trace. Or, the audio module wires (including all analog audio wires) adopt a differential signal or pseudo differential signal mode to cancel the common mode interference and enhance the signal-to-noise ratio of the signal.

For example, the audio module can be powered by a single low-voltage linear voltage-stabilized power supply, so that high-frequency interference signals are prevented from being input from the power supply and affecting the audio effect.

In some embodiments, the composite access card of the present disclosure can have different appearance designs. The composite pass card and the appearance size of each functional module can be set randomly according to different requirements. In one embodiment, the composite access card of the present disclosure may have dimensions of 85.5mm by 54mm by 5mm, and the error may be ± 0.2 mm. The size of the audio playback device may be, for example, a square of 5mm by 5mm, or a circle of 5mm in diameter.

In one embodiment, the appearance of a conventional CPC card may be optimized to obtain the CPC card of the present disclosure. Wherein, can increase the audio frequency grooving of making a sound on the surface of traditional CPC card, the fluting area can cover the audio playback device size to carry out voice broadcast. Alternatively, an LED indicator light opening can be added on the surface of the conventional CPC card for the visual indicator light to flash.

FIG. 4 shows a schematic exterior view of a composite access card according to one embodiment of the present disclosure. The audio module of the composite pass card of the present disclosure may include an audio player, among others.

As shown in fig. 4, the composite access card of the present disclosure may include a housing 401, which may include an audio output slot 402, one or more indicator light apertures 403.

The audio output slot 402 may face the audio player to output sound to the outside. One or more indicator light openings 403 for the one or more indicator lights, respectively. In other embodiments, the housing 401 may further include a fixing device for mounting the display screen, which will not be described herein.

In some embodiments, the audio module or its arrangement structure may be designed to make the audio playing effect better.

Fig. 5 shows a block diagram of an audio player according to one embodiment of the present disclosure.

Referring to fig. 5, for example, the rear portion of the audio player may be closely attached to the circuit board to form a closed structural rear sound cavity, so that the low frequency effect of the audio player is optimized. Or, a space is reserved between the front part of the audio player and the audio output groove to form a front sound cavity, so that the high-frequency effect of the audio player is optimal. Or the audio output groove comprises a plurality of sound outlet holes, the number of the sound outlet holes is reasonably controlled, and the ratio of the total area of the sound outlet holes to the area of the vibration film of the audio player is about 30%. Or a waterproof and dustproof net is arranged between the front sound cavity and the audio output groove, so that the audio playing function can still be normally used under severe conditions.

It should be understood by those skilled in the art that the above description of the circuit structure and/or appearance of the composite access card is only an illustration of the structure of the composite access card of the present disclosure or its functional implementation and is not limiting, and that the composite access card of the present disclosure can also be implemented in other structures, and the present disclosure is not limited thereto.

In addition, in some embodiments, the composite pass card disclosed above can also be applied to a real-time road condition distribution system.

The road condition real-time release system can comprise the composite pass card and a road side unit arranged on the road side. The road side unit may be configured to receive road-related prompt information, and send an activation signal (i.e., a wake-up signal) and the road-related prompt information to the composite access card in the vicinity of the road side unit.

Here, "near" may mean, for example, within a predetermined distance range of the roadside unit. Alternatively, it may be indicated that the composite traffic card receiving the activation signal or the road-related guidance information is within a wireless communication distance range of the wireless communication module (i.e., the 5.8GHz transceiver circuit) of the roadside unit, in other words, the composite traffic card near the roadside unit can receive the activation signal or the road-related guidance information transmitted by the roadside unit. The road side unit may receive road related advisory information from a server or other road side unit or other vehicle (e.g., in a vehicle network scenario). Furthermore, the roadside unit may send an activation signal or road-related prompt information to the composite transit card in the vicinity thereof, for example, in the case where there is road-related prompt information that needs to be issued.

The function implementation of the road condition real-time publishing system is the same as or similar to that described above, and details can be referred to the above related description, which is not described herein again.

While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. A composite access card is characterized by comprising a control module, a wireless communication module capable of receiving road-side unit-sent road-related prompt information and an output module capable of outputting prompt information based on the road-related prompt information received by the wireless communication module,

wherein the wireless communication module and the output module are both connected to the control module.

2. The composite access card of claim 1, further comprising:

a wake-up module coupled to the control module to wake-up the control module in response to receiving a wake-up signal from a roadside unit,

the control module starts the wireless communication module after being awakened so as to receive road related prompt information sent by the road side unit.

3. The composite access card of claim 2,

the wake-up module is periodically started to receive a signal sent by the road side unit, and judges whether the signal wakes up the signal or not under the condition of receiving the signal.

4. The composite access card of claim 1, further comprising:

and the storage module is contained in the control module or connected to the control module and is used for storing the road-related prompt information received by the wireless communication module, and the output module outputs the prompt information based on the road-related prompt information stored in the storage module.

5. The composite access card of claim 1, wherein the output module comprises at least one of:

an audio module;

one or more indicator lights; and

a display screen.

6. The composite access card of claim 5,

the audio module is disposed remotely from the wireless communication module; and/or

The audio module and the wireless communication module are respectively arranged on two opposite sides of the circuit board; and/or

The audio module adopts a complete audio ground plane and is isolated from the surrounding ground plane; and/or

The audio module wiring adopts a differential signal or false differential signal mode.

7. The composite access card of claim 5, further comprising:

the first power supply module is used for supplying power to other modules except the audio module; and

and the second power supply module is independent of the first power supply module and is used for supplying power to the audio module.

8. The composite access card of claim 5, wherein the audio module comprises an audio player, and wherein the housing of the composite access card comprises:

an audio output slot facing the audio player to output sound to the outside; and/or one or more indicator light apertures for said one or more indicator lights, respectively; and/or a fixing device for mounting the display screen.

9. The composite access card of claim 8,

the rear part of the audio player is tightly attached to the circuit board to form a rear sound cavity with a closed structure; and/or

A space is reserved between the front part of the audio player and the audio output groove to form a front sound cavity; and/or

The audio output slot comprises a plurality of sound outlet apertures, a ratio of a total area of the plurality of sound outlet apertures to a diaphragm area of the audio player is about 30%; and/or

And a waterproof and dustproof net is arranged between the front sound cavity and the audio output groove.

10. A road condition real-time publishing system is characterized by comprising:

the composite access card of any of claims 1-9; and

and the road side unit is arranged at the road side and used for receiving the road related prompt information and sending an activation signal and the road related prompt information to the composite access card nearby.

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