KR101996632B1 - Driver alarm device and system using communication facilities in road tunnel - Google Patents

Abstract

Disclosed are a driver alarm device using a communication facility in a road tunnel, and a system thereof. Driving conditions of a vehicle in a road tunnel are analyzed by using a millimeter wave communication facility, and a hologram is provided to a vehicle not maintaining a safety distance between vehicles so that the vehicle maintains the safety distance. According to one aspect of the present invention, a system for providing a safety distance between vehicles in a road tunnel comprises: at least one millimeter wave sensor installed in the road tunnel to sense and transmit vehicles; a plurality of hologram display devices installed in lanes of the road tunnel at predetermined intervals in the travel direction to output holograms; and a control server analyzing a distance between a specific vehicle and a preceding vehicle in the same lane of the road tunnel on the basis of sensing information received from the at least one millimeter wave sensor, and displaying a red hologram by controlling a hologram display device positioned in rear of the preceding vehicle among the plurality of hologram display devices installed in adjacent left and right lanes for the preceding vehicle when the distance between the specific vehicle and the preceding vehicle is within a predetermined distance.

Description

Technical Field [0001] The present invention relates to a driver alarm device and a system using communication facilities in a road tunnel,

The present invention relates to a driver alarm device and system using a communication device in a road tunnel, a driver alarm device for analyzing a vehicle traveling pattern using a millimeter wave sensor communication device in a road tunnel, and guiding a vehicle safety distance through a hologram ≪ / RTI >

Road tunnels are formed through mountains or underground for fast passage of vehicles. These road tunnels are dark inside and all sides except for front and back are blocked, which can lead to many casualties and traffic congestion in the event of a car accident. Accordingly, various attempts have been made to prevent safety accidents in road tunnels. Typically, it is prohibited to change the lane in the road tunnel or the CCTV speed camera is installed so that the vehicle can not travel at a speed higher than the predetermined speed. However, some drivers may overtake and overtake the lane, or they may overtake, or they can speed down only in the vicinity of the CCTV speed camera and speed up the rest of the road. In particular, road tunnels have a dark interior, so that such abrupt driving is more exposed to the risk of safety accidents than roads outside the tunnel and causes large accidents. Therefore, it is necessary to appropriately control the speeding or speeding of the vehicle in the road tunnel. Especially in the case of a rudder driver, the driver does not obey the safety distance between the cars and follows the preceding vehicle closely. Therefore, if the preceding vehicle makes a sudden stoppage, the possibility of a collision is very high and it can lead to a fatal accident especially on highway. Especially when these rugged drivers are gathered and run without complying with the safety distance of the car, it can lead to a major accident.

The present invention has been proposed in order to solve the above problems, and it is an object of the present invention to provide a hologram-type vehicle control system for a vehicle that analyzes a running state of a vehicle in a road tunnel using a millimeter wave communication facility, And to provide a driver alarm device and system for guiding the driver to the vehicle.

The present invention also provides a driver alarm device and system for analyzing vehicle overspeed signals using a millimeter wave communication facility in a road tunnel and guiding deceleration in a hologram form when there is an overspeed indication Have a different purpose

A system for guiding an inter-vehicle safety distance in a road tunnel along one side includes: at least one millimeter wave wave sensor installed in a road tunnel to sense and transmit the vehicle; A plurality of hologram display devices provided at predetermined intervals along a traveling direction in a lane in the road tunnel to output a hologram; And a controller for analyzing a distance between the vehicle and a preceding vehicle in the same lane in the road tunnel based on sensing information received from the at least one millimeter wave wave sensor, And a control server for displaying a red hologram by controlling a hologram display device located at a rear portion of the front vehicle among the plurality of hologram display devices installed in adjacent left and right lanes of the vehicle.

Wherein each of the plurality of hologram display devices is provided in a groove formed in the lane and each hologram display device includes a first light emitting portion provided on one surface of the groove and emitting reference light, A first reflector disposed on the first reflector to reflect the reference light; A second light emitting portion for emitting object light provided on the other surface of the groove, a second reflecting portion provided on the one surface and reflecting the object light, And a display unit for generating a hologram using the reference light reflected by the first reflecting unit and the object light reflected by the second reflecting unit.

The control server displays a plurality of hologram displays positioned within a second distance larger than the first distance from the front vehicle, the hologram display being located at a first distance or more forward from the front vehicle among the plurality of hologram display devices installed in the adjacent lane of the front vehicle, The hologram can be displayed sequentially from the hologram display device located at a long distance to the hologram display device located at a short distance from the device.

The control server may increase the first distance and the second distance as the speed of the preceding vehicle increases.

Wherein the control server is further provided with means for setting a predetermined number of lanes of the specific vehicle in the road tunnel based on sensing information received from the at least one millimeter wave wave sensor, The hologram can be displayed by controlling at least one hologram display device positioned in front of the specific vehicle among the plurality of hologram display devices.

Wherein the control server is further operable to determine whether the vehicle exists in the left or right lane of the specific vehicle in the road tunnel based on the sensing information received from the at least one millimeter wave wave sensor, The hologram can be displayed by controlling at least one hologram display device provided in a lane between the specific vehicle and the other vehicle among the plurality of hologram display devices.

The control server can increase the specific distance as the speed of the specific vehicle increases and decrease the specific distance as the speed of the specific vehicle decreases.

According to the present invention, when a vehicle does not maintain a safe distance between the vehicle and a preceding vehicle in a road tunnel, a red three-dimensional hologram is displayed through a hologram display device installed in left and right lanes of the preceding vehicle, So that a collision accident with the preceding vehicle can be prevented in advance.

According to the present invention, a driving pattern of a vehicle is analyzed in a road tunnel, and when there is an overspeed indication, a hologram is displayed through a hologram display device installed in a lane where a driver's line of sight can directly reach, Can be prevented in advance.

According to the present invention, it is possible to inform the driver of the risk of a lane change through a three-dimensional hologram, thereby providing an immediate warning compared to a conventional broadcast or electric signboard, thereby preventing a safety accident.

According to the present invention, since the hologram display device is installed in the groove formed in the lane, it can give a warning according to the lane change by the noise generated by the groove at the time of changing the lane of the vehicle, and also prevents the breakage of the hologram display device.

FIG. 1 is a view illustrating a system for guidance of safety distance between a road tunnel in a road tunnel according to an embodiment of the present invention.
2 is a view illustrating a lane groove and a hologram display device according to an embodiment of the present invention.
3 is a cross-sectional view taken along line AA 'of FIG.
FIG. 4 is a diagram showing the configuration of the control server of FIG. 1;
5 is a flowchart illustrating a method of guiding an inter-vehicle safety distance in a road tunnel according to an embodiment of the present invention.
FIG. 6 is a schematic view illustrating a process of displaying a hologram for guidance of a headway distance according to an embodiment of the present invention. Referring to FIG.
7 is a flowchart illustrating a method for guiding overspeed prevention in a road tunnel according to an embodiment of the present invention.
FIG. 8 is a view illustrating a process of displaying a hologram on a speeding vehicle according to an embodiment of the present invention. Referring to FIG.
9 is a flowchart illustrating a method of guiding overspeed prevention in a road tunnel according to another embodiment of the present invention.
10 is a flowchart illustrating a method of guiding an inter-vehicle safety distance in a road tunnel according to another embodiment of the present invention.
11 is a flowchart illustrating a method of guiding a lane change prevention according to an embodiment of the present invention.

The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view illustrating a system for guidance of safety distance between a road tunnel in a road tunnel according to an embodiment of the present invention.

1, a system according to an embodiment of the present invention includes at least one millimeter wave sensor 110 installed on a wall surface of a road tunnel 101, a lane 102 of a road surface in a road tunnel 101, A plurality of hologram display devices 120 installed in the main body 100, a control server 130 communicating with the hologram display devices 120, and an administrator terminal 140.

Referring to FIG. 1, a lane 102 for distinguishing a lane is drawn in a road tunnel 101. This lane 102 includes a solid white lane or a yellow lane and a dotted white lane. A solid yellow lane is a lane that separates the driving direction and is often referred to as a center lane. The solid white lane indicates that the lane of the driving vehicle can not be changed by distinguishing the lane on the road composed of the lanes in the same driving direction. On the other hand, the white lane of the dotted line indicates that the lane of the driving vehicle can be changed by distinguishing the lane on the road composed of the lanes in the same driving direction.

The at least one millimeter wave sensor 110 is a communication facility in which a plurality of the at least one millimeter wave sensor 110 are installed at a predetermined interval on the left wall surface and the right wall surface of the road tunnel 101. However, the present invention is not necessarily limited thereto, and it may be installed only on one wall or only one, depending on the performance of the sensor. It is also described as being mounted on a wall, but it is not limited thereto and may be provided on the jaw between the pedestrian guide and the road.

The at least one millimeter wave sensor 110 includes an antenna for receiving a signal in a millimeter band radiated from an object naturally or a signal radiated from a millimeter band signal as an object and a signal received through the antenna, It is composed of an amplifier that amplifies the signal and a detector that transforms the amplified signal into a DC type signal. It analyzes the distance to the object, the speed of the object, and the angle with the object to track the movement of the object. The millimeter band is a 30 to 300 GHz band, and a millimeter wave is an electromagnetic wave having a wavelength in millimeters (mm). The millimeter wave has a short wavelength due to the nature of radio waves, which makes it possible to miniaturize antennas and devices. The at least one millimeter wave sensor 110 communicates with the control server 130 by wire or wireless and transmits the sensing information to the control server 130.

The plurality of hologram display devices 120 are installed in the lane 102 in the road tunnel 101. Preferably, they are installed at regular intervals in white lanes. The hologram display device 120 is preferably inserted into a groove made in the lane 102 so as not to be damaged by the vehicle when the lane 102 of the vehicle is changed. The hologram display device 120 may be one of an analog hologram system and a digital hologram system.

FIG. 2 is a view showing a lane groove and a hologram display device according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along line A-A 'of FIG. As shown in FIGS. 2 and 3, grooves 210 are formed by unevenness between two lines that are not painted white in a white dotted lane 102, and a hologram display device 120 are installed. 3, the hologram display device 120 installed in the groove 210 is a digital hologram system having two light emitting portions 121a and 121b, two reflecting portions 122a and 122b, a display 123, a memory, a microprocessor (not shown), and a communication unit (not shown). Here, the display 123 includes a photosensitive film for hologram display.

Specifically, a first light emitting portion 121a is provided on one side of the groove 210, and a first reflecting portion 122a is provided on the other side opposite to the first light emitting portion 121a to emit light from the first light emitting portion 121a. Is reflected by the first reflecting portion 122a. The second light emitting portion 121b is provided on the other surface of the groove 210 and the second reflecting portion 122b is provided on the opposite surface of the groove 210 so that light emitted from the second light emitting portion 121b And the second reflecting portion 122b reflects. Preferably, reference light is emitted from the first light emitting portion 121a, and object light is emitted from the second light emitting portion 121b. The reference light reflected by the first reflecting portion 122a and the object light reflected by the second reflecting portion 122b pass through the display 123, causing interference phenomenon, and a stereoscopic hologram is displayed. The light emitting units 121a and 121b may be laser-enabled, and information on the object light may be stored in the memory. The microprocessor controls the light emitting units 121a and 121b according to information stored in the memory. The microprocessor can control the intensity and color of light. The communication unit also communicates with the control server 130 via wireless or wired communication and receives a command from the control server 130. [ Preferably, the communication unit performs wireless communication, and the communication method may be a known communication method or a communication method developed in the future.

2, a digital hologram system has been described as the hologram display apparatus 120, but the present invention is not limited thereto, and an analog hologram system can also be applied. In the case of the analog hologram method, a hologram is displayed by further including an object to be expressed by an actual hologram, and interference between light reflected from the object and light reflected from the reflection portion is displayed.

The control server 130 communicates with at least one millimeter wave sensor 110 and at least one hologram display device 120. The communication may be wired or wireless. The control server 130 receives the sensing information from the at least one millimeter wave sensor 110 and analyzes the received sensing information to track the vehicles traveling in the road tunnel 101. The control server 130 preferably tracks the vehicle from the time when the vehicle enters the road tunnel 101. The control server 130 analyzes the driving of the vehicle and controls at least one or more hologram display devices 120 installed in the left and right lanes of the front vehicle to display the hologram if there is a vehicle that does not secure a safe distance from the preceding vehicle. In addition, the control server 130 controls at least one or more hologram display devices 120 installed in the left lane or the right lane of the vehicle, for a vehicle which is overspeed or has an overspeed indication, So that the hologram is displayed. In addition, the control server 130 can transmit the driving situation of the vehicles in the road tunnel 101 and the operation status of the hologram display device 120 to the administrator terminal 140 via the communication network and display them. The communication network may be an Internet network, a Global System for Mobile Communication (GSM), an Enhanced Data GSM Environment (EDGE), a wideband code division multiple access (WCDMA), a code division multiple access (CDMA), a time division multiple access (TDMA) WiFi, Bluetooth (Beacon), and the like, and includes a communication network that has not yet been developed at the time of filing of the present application. Here, the administrator terminal 140 is a terminal capable of communicating with a smart phone, a personal computer, a tablet PC, a notebook computer, or the like. Hereinafter, the configuration and operation method of the control server 130 will be described in detail with reference to the drawings.

FIG. 4 is a diagram showing the configuration of the control server of FIG. 1; The control server 130 may include a memory, a memory controller, one or more processors (CPUs), a peripheral interface, an input / output (I / O) subsystem, a display device, an input device and a communication circuit. The memory may include high speed random access memory and may also include one or more magnetic disk storage devices, non-volatile memory such as flash memory devices, or other non-volatile semiconductor memory devices. Access to the memory by other components such as the processor and the peripheral interface may be controlled by the memory controller. The memory can store various information and program instructions, and the program is executed by the processor. The peripheral interface connects the input / output peripheral to the processor and memory. The one or more processors execute various software programs and / or a set of instructions stored in memory to perform various functions for the system and process the data. The I / O subsystem provides an interface between I / O peripheral devices such as display devices, input devices, and peripheral interfaces. The display device may employ various technologies such as a liquid crystal display (LCD) technology or a light emitting polymer display (LPD) technology, and the display device may be a capacitive type, a resistive type, or an infrared type. The touch display provides an output interface and an input interface for the user. The touch display displays a visual output to the user. The visual output may include text, graphics, video, and combinations thereof. Some or all of the visual output may correspond to a user interface object. A processor is a processor configured to perform an operation associated with a system and to perform instructions, such as using instructions retrieved from a memory to control the reception and manipulation of input and output data between components of the system. The communication circuit performs communication via an external port or communication by an RF signal. The communication circuit converts the electrical signal to an RF signal and vice versa, and is capable of communicating with the communication network, other mobile gateway devices, and the communication device through the RF signal.

4, the control server 130 includes a sensing information receiving unit 410, a vehicle travel analyzing unit 420, a hologram display control unit 430, and a control screen generating unit 440. These components may be implemented as a program, stored in a memory, executed by a processor, or implemented in a combination of hardware and software.

The sensing information receiving unit 410 receives sensing information from at least one millimeter wave sensor 110. The sensing information receiving unit 410 can communicate with at least one millimeter wave sensor 110 by wire or wirelessly through a communication circuit.

The vehicle running analysis unit 420 analyzes the sensing information received by the sensing information receiving unit 410 and analyzes and tracks the running state of the vehicles in the road tunnel 101. [ It is preferable that the vehicle running analysis unit 420 analyzes and tracks the running state of the vehicle from the time when the vehicle enters the road tunnel 101. [ The vehicle travel analyzing unit 420 analyzes the road information on the road based on the road information (e.g., map information including the road width, the number of lanes, the length of the tunnel, etc.) in the road tunnel 101 stored in the memory You can analyze the current location of the vehicles, the speed, the number of lane changes, etc., and analyze the size of the vehicle.

The vehicle running analysis unit 420 can analyze the speed of the vehicle to set the analysis distance and check whether there is another vehicle in the front, left, or right lane of the analysis distance. The vehicle running analysis unit 420 refers to the running speed of the vehicle in setting the analysis distance. That is, the vehicle running analysis unit 420 sets the analysis distance when the speed of the vehicle is equal to or greater than the first threshold speed (for example, 40 km / h), but increases the analysis distance as the speed of the vehicle increases. For example, when the vehicle speed is 60 km / h, the analysis distance is set to 10 m, and when the vehicle speed is 80 km / h, the analysis distance is set to 20 m. As the speed of the vehicle increases, accidents may occur in a matter of seconds even if other vehicles are far away. Conversely, if the speed of the vehicle decreases, the analysis distance is reduced.

The hologram display control unit 430 controls at least one hologram display device 120 installed in the lane based on the information analyzed by the vehicle running analysis unit 420. [ The hologram display control unit 430 controls the hologram display unit 120 installed on the right and left sides of the front vehicle among the hologram display units 120 installed on the left and right sides of the front vehicle, , And more preferably controls the hologram display device 120 installed at the rear portion of the front vehicle so as to display a red hologram. Therefore, when the driver of the vehicle that does not secure the safety distance sees the front vehicle, it is seen that the front vehicle brakes, so that the safety distance with the front vehicle is secured by reducing the speed naturally. Alternatively, when the distance from the preceding vehicle is within a predetermined distance, the hologram display control unit 430 does not display the hologram unconditionally in the hologram display device 120 installed in the left and right lane of the preceding vehicle, And the hologram can be performed only when the distance from the preceding vehicle is within a certain distance. This is to guide only those vehicles that have not secured a safe distance in a smooth traffic situation, not a congestion situation.

The hologram display control unit 430 controls the hologram to be displayed in at least one hologram display device 120 provided on the adjacent left lane or the adjacent right lane of the vehicle in which the vehicle is traveling when the vehicle speed is equal to or higher than the specified speed. The hologram display control unit 430 can display the hologram by controlling at least one hologram display device 120 installed at a position more than a distance determined according to the speed of the vehicle, From the hologram display device 120 installed in the hologram display device 120 to the hologram display device 120 nearer to the vehicle, so that the holograms are sequentially displayed from far away from the vehicle. It is preferable that the distance is set to a distance in proportion to the speed of the vehicle. Further, the hologram display control unit 430 can change the color of the hologram according to the speed of the vehicle in controlling the hologram display device 120. [ For example, it is divided into red, orange, and yellow. If the color is relatively high, the color is red. If the color is relatively low, the color is yellow. In the middle, a hologram of orange can be displayed.

The hologram display control unit 430 determines that the vehicle is overspeed if the number of lane change times of the vehicle is equal to or greater than a threshold number of times based on the information analyzed by the vehicle running analysis unit 420, The hologram can be controlled to be displayed in at least one hologram display device 120 provided in the adjacent left lane or the adjacent right lane. As described above, the hologram display method sequentially displays the holograms from a far place to the front of the vehicle, thereby giving the driver a feeling of approaching the driver, thereby reducing the speed of the driver.

When the hologram display control section 430 is informed from the vehicle running analysis section 420 that there is another vehicle in the adjacent left or adjacent right lane in the analysis distance centered on the specific vehicle, So that the hologram is displayed on at least one hologram display device 120 installed in the lane. The hologram display control unit 430 controls at least one hologram display device 120 installed at a position at a distance equal to or greater than the speed determined by the speed of the specific vehicle in the lane between the specific vehicle and the other vehicle have. For example, when there is the specific vehicle in the first lane and another vehicle exists in the second lane, the hologram display device 120 is controlled by controlling the hologram display device 120 in the lane that border the first lane and the second lane, In this case, if the speed of the specific vehicle is 60 km / h, the hologram is displayed in at least one hologram display device 120 positioned within 20 m and located 10 m or more ahead of the specific vehicle. If the speed of the specific vehicle is 100 km / h A hologram is displayed on at least one or more hologram display devices 120 located at a position 20 m or more forward from the specific vehicle and located within 50 m. If the speed of the vehicle is high, even if the hologram is displayed on the hologram display device 120 close to the vehicle, the driver can not recognize the hologram. At this time, when the speed of the specific vehicle is lower than the specific threshold speed, the hologram display control unit 430 does not display the hologram even if there is another vehicle on the adjacent lane. This is because the risk of an accident is significantly reduced if the speed is low, for example in a congested situation.

Further, when the hologram display control unit 430 controls the hologram display device 120 to display the hologram, the hologram display control unit 430 can control the hologram to blink in a constant cycle, thereby increasing visibility and attention. In addition, the hologram display control unit 430 can control the hologram color, display height, and the like.

The control screen generating unit 440 generates a control screen including the driving situation of the vehicles in the road tunnel 101 and the operation status of the hologram display device 120 based on the information analyzed by the vehicle driving analysis unit 420 To the administrator terminal 140 via the communication network, and display it.

5 is a flowchart illustrating a method of guiding an inter-vehicle safety distance in a road tunnel according to an embodiment of the present invention. Referring to FIG. 5, in step S501, the control server 130 receives sensing information from at least one millimeter wave sensor 110. FIG. The control server 130 can communicate with at least one millimeter wave sensor 110 either wired or wirelessly via a communication circuit.

In step S502, the control server 130 determines whether there is a vehicle entering the road tunnel 101 based on the sensor information. In step S503, when the vehicle enters the road tunnel 101, the control server 130 analyzes the distance from the preceding vehicle to the lane on which the vehicle is traveling. Road information (e.g., road width, number of lanes, map information including the length of a tunnel, etc.) in the road tunnel 101 is stored in the memory of the control server 130, The current location, speed, and size of the vehicles in the road can be analyzed.

In step S504, the control server 130 determines whether the distance from the preceding vehicle is a certain distance, that is, within the safety distance. In step S506, the control server 130 maintains the hologram display device 120 as it is when the distance from the preceding vehicle is equal to or greater than the safety distance. On the other hand, if the distance from the front vehicle is within the safe distance, the control server 130 determines in step S505 that the hologram display device 120 installed in the rear part of the front vehicle among the hologram display devices 120 installed in the adjacent left- (120) to display a red hologram. At this time, the control server 130 displays a red hologram in the hologram display device 120 at the rear portion of the front vehicle for a predetermined time according to the speed of the front vehicle. That is, when the preceding vehicle advances, the previous hologram display device 120 is turned off and the hologram display device 120 of the trailing portion of the current vehicle is turned on.

5, red holograms are displayed in the left and right lanes of the front vehicle, so that the driver of the vehicle following the front vehicle is recognized as stepping on the front vehicle so that the driver can reduce the vehicle speed Securing the distance.

FIG. 6 is a schematic view illustrating a process of displaying a hologram for guidance of a headway distance according to an embodiment of the present invention. Referring to FIG. 6, when a vehicle 610 having a distance d with respect to the front vehicle 620 is within a safe distance, a plurality of hologram display devices 120 provided in left and right lanes of the front vehicle 620, The hologram display device 120 installed at the rear portion of the front vehicle 620 is turned on to display a red hologram. Therefore, the driver of the vehicle 610 chasing the front vehicle 620 is recognized as pressing the brake on the front vehicle 620, and accordingly the driver secures the headway safety distance by reducing the vehicle speed.

7 is a flowchart illustrating a method for guiding overspeed prevention in a road tunnel according to an embodiment of the present invention. Referring to FIG. 7, in step S701, the control server 130 receives sensing information from at least one millimeter wave sensor 110. FIG. The control server 130 can communicate with at least one millimeter wave sensor 110 either wired or wirelessly via a communication circuit.

In step S702, the control server 130 determines whether there is a vehicle entering the road tunnel 101 based on the sensor information. In step S703, when the vehicle enters the road tunnel 101, the control server 130 analyzes the speed of the vehicle based on the sensor information. Road information (e.g., road width, number of lanes, map information including the length of a tunnel, etc.) in the road tunnel 101 is stored in the memory of the control server 130, The current location, speed, and size of the vehicles in the road can be analyzed.

In step S704, the control server 130 determines whether the speed of the vehicle is equal to or higher than the specified speed. In step S706, the control server 130 maintains the hologram display device 120 as it is when the speed of the vehicle is less than the specified speed. On the other hand, when the vehicle speed is equal to or higher than the specified speed, in step S705, the control server 130 determines that the hologram is present in at least one hologram display device 120 installed in the adjacent left lane or the adjacent right lane of the lane on which the vehicle is traveling Is displayed. The control server 130 can display the hologram by controlling at least one hologram display device 120 installed at a position more than a distance determined according to the speed of the vehicle or can display the hologram at a position more than a distance determined according to the speed of the vehicle It is possible to sequentially control the hologram display device 120 from the installed hologram display device 120 to the hologram display device 120 closer to the vehicle so that the holograms are displayed sequentially from a distance from the vehicle. In addition, the control server 130 can change the color of the hologram according to the speed of the vehicle in controlling the hologram display device 120. [ For example, it is divided into red, orange, and yellow. If the color is relatively high, the color is red. If the color is relatively low, the color is yellow. In the middle, a hologram of orange can be displayed.

When a specific vehicle is traveling without securing a safe distance from the front vehicle, the hologram display device 120 installed in the rear portion of the front vehicle, among the hologram display devices 120 installed in adjacent left and right lanes of the front vehicle, 120 to display a red hologram so as to reduce the speed of the specific vehicle, thereby securing a headway safety distance. In the case where the front vehicle is overspeed, the hologram is displayed in front of the front vehicle in accordance with the embodiment described with reference to Fig. 7, so that the front vehicle can brake the brakes to reduce the speed, Distance can be secured.

As another embodiment, in the case where the hologram is not displayed in front of the front vehicle only when the front vehicle is oversized as in the embodiment referenced in Fig. 7, and the distance between the two vehicles does not secure the safety distance even if the over- The hologram is displayed in the rear portion of the front vehicle as well as the hologram is displayed in front of the front vehicle as in the embodiment described with reference to Fig. 7, The safety distance can be secured while reducing the speed.

FIG. 8 is a view illustrating a process of displaying a hologram on a speeding vehicle according to an embodiment of the present invention. Referring to FIG. 8, when the speeding vehicle 810 is present, among the plurality of hologram display devices 120 provided in the adjacent left and right lanes 102 of the speeding vehicle 810, The hologram display device 120 is turned on sequentially from the distant hologram display device 120 to the hologram display device 120 in front of the speeding vehicle 810 to display the hologram. That is, as shown in FIG. 8, holograms are sequentially displayed with the parallaxes from 1 to N sequentially. The hologram displayed here is displayed in the same form as the lane separator. Since the hologram is sequentially displayed from a place far away from the speeding car 810, a lane separator gives a sense of approaching to the driver from the viewpoint of the driver, thereby inducing the driver to reduce the speed of the vehicle 810.

9 is a flowchart illustrating a method of guiding overspeed prevention in a road tunnel according to another embodiment of the present invention. Referring to FIG. 9, in step S901, the control server 130 receives sensing information from at least one millimeter wave sensor 110. FIG. The control server 130 can communicate with at least one millimeter wave sensor 110 either wired or wirelessly via a communication circuit.

In step S902, the control server 130 determines whether there is a vehicle entering the road tunnel 101 based on the sensor information. In step S903, when the vehicle enters the road tunnel 101, the control server 130 counts the number of times of lane change of the vehicle based on the sensing information. Road information (e.g., road width, number of lanes, map information including the length of a tunnel, etc.) in the road tunnel 101 is stored in the memory of the control server 130, The current location, speed, and size of the vehicles in the road can be analyzed.

In step S904, the control server 130 determines whether the number of lane change times of the vehicle is equal to or greater than a threshold number of times for a predetermined period of time. In step S905, when the lane change frequency of the vehicle is less than the threshold frequency for a certain period of time, the control server 130 keeps the hologram display device 120 in the off state as it is, and again the lane change frequency exceeds the threshold frequency .

On the other hand, as a result of checking in step S904, in step S906, in which the number of lane change times of the vehicle is equal to or greater than the threshold number of times for a predetermined time, the control server 130 determines whether the vehicle is in the adjacent left lane or adjacent right lane The hologram display device 120 of FIG. The control server 130 can display the hologram by controlling at least one hologram display device 120 installed at a position more than a distance determined according to the speed of the vehicle or can display the hologram at a position more than a distance determined according to the speed of the vehicle It is possible to sequentially control the hologram display device 120 from the installed hologram display device 120 to the hologram display device 120 closer to the vehicle so that the holograms are displayed sequentially from a distance from the vehicle.

In the road tunnel 101, it is considered that the vehicle frequently changes the lane to change the lane to overtake the next vehicle. In order to overtake the next vehicle, it is necessary to increase the speed as much as possible, there is a possibility of speeding up, and unexpected accidents may occur while changing the lane. Therefore, in the case of a vehicle frequently changing the lane, the hologram is displayed in front of the left and right lanes so as to prevent overspeed and prevent a safety accident when changing lanes.

10 is a flowchart illustrating a method of guiding an inter-vehicle safety distance in a road tunnel according to another embodiment of the present invention. Referring to FIG. 10, in step S1001, the control server 130 receives sensing information from at least one millimeter wave sensor 110. FIG. The control server 130 can communicate with at least one millimeter wave sensor 110 either wired or wirelessly via a communication circuit. In step S1002, the control server 130 determines whether there is a vehicle entering the road tunnel 101 based on the sensor information.

In step S1003, when the vehicle enters the road tunnel 101, the control server 130 analyzes the speed of the vehicle based on the sensor information. Road information (e.g., road width, number of lanes, map information including the length of a tunnel, etc.) in the road tunnel 101 is stored in the memory of the control server 130, The current location, speed, and size of the vehicles in the road can be analyzed.

In step S1004, the control server 130 determines whether the speed of the vehicle is equal to or higher than a predetermined speed. In step S1006, the control server 130 maintains the hologram display device 120 as it is when the speed of the vehicle is less than a predetermined speed. On the other hand, when the speed of the vehicle is equal to or higher than the predetermined speed, in step S1005, the control server 130 confirms whether the distance from the preceding vehicle to the preceding vehicle is within a predetermined distance. If the distance from the preceding vehicle is equal to or greater than the predetermined distance, the control server 130 maintains the hologram display device 120 in the off state at step S1006.

If it is determined in step S1005 that the distance between the vehicle and the preceding vehicle is within a certain distance, that is, within the safe distance, the control server 130 determines in step S1007 that the hologram display device 120 The red hologram is displayed by controlling the hologram display device 120 installed at the rear portion of the front vehicle. At this time, the control server 130 displays a red hologram in the hologram display device 120 at the rear portion of the front vehicle for a predetermined time according to the speed of the front vehicle. That is, when the preceding vehicle advances, the previous hologram display device 120 is turned off and the hologram display device 120 of the trailing portion of the current vehicle is turned on.

When a vehicle traveling at a predetermined speed or more does not secure a safe distance with the preceding vehicle as in the embodiment of FIG. 10, a red hologram is displayed in the left and right lanes of the preceding vehicle, So that the driver can reduce the vehicle speed to secure the headway safety distance. According to the embodiment with reference to FIG. 10, holograms are displayed for a vehicle that does not secure a safe distance when the vehicle is in normal traffic, not when it is in a road tunnel, thereby preventing holograms from being unnecessarily displayed during congestion.

11 is a flowchart illustrating a method of guiding a lane change prevention according to an embodiment of the present invention.

Referring to FIG. 11, in step S1101, the control server 130 receives sensing information from at least one millimeter wave sensor 110. FIG. The control server 130 can communicate with at least one millimeter wave sensor 110 either wired or wirelessly via a communication circuit.

In step S1102, the control server 130 determines whether there is a vehicle entering the road tunnel 101 based on the sensor information. In step S1103, when the vehicle enters the road tunnel 101, the control server 130 analyzes the speed of the vehicle based on the sensor information. Road information (e.g., road width, number of lanes, map information including the length of a tunnel, etc.) in the road tunnel 101 is stored in the memory of the control server 130, The current location, speed, and size of the vehicles in the road can be analyzed.

In step S1104, the control server 130 sets the analysis distance according to the speed of the vehicle. Here, the analysis distance may be a predetermined radius around the position of the vehicle, or may be a predetermined radius based on the rear edge of the vehicle, but is not limited thereto. The control server 130 refers to the speed of the vehicle under running in setting the analysis distance. That is, the control server 130 sets the analysis distance when the speed of the vehicle is equal to or greater than the first threshold speed (for example, 40 km / h), but increases the analysis distance as the speed of the vehicle increases. For example, when the vehicle speed is 60 km / h, the analysis distance is set to 10 m, and when the vehicle speed is 80 km / h, the analysis distance is set to 20 m. Conversely, if the speed of the vehicle decreases, the analysis distance is reduced.

In step S1105, the control server 130 confirms whether there is another vehicle in the left lane or the right lane in the analysis distance. If another vehicle exists, the control server 130 controls the hologram to be displayed in at least one hologram display device 120 installed in the lane, which is the boundary between the vehicle and the other vehicle, in step S1106. Preferably, the control server 130 controls at least one hologram display device 120 installed in a lane between the specific vehicle and the other vehicle at a position over a distance determined according to the speed of the specific vehicle to display a hologram can do. For example, when there is the specific vehicle in the first lane and another vehicle exists in the second lane, the hologram display device 120 is controlled by controlling the hologram display device 120 in the lane that border the first lane and the second lane, In this case, if the speed of the specific vehicle is 60 km / h, the hologram is displayed in at least one hologram display device 120 positioned within 20 m and located 10 m or more ahead of the specific vehicle. If the speed of the specific vehicle is 100 km / h A hologram is displayed on at least one or more hologram display devices 120 located at a position 20 m or more forward from the specific vehicle and located within 50 m. At this time, the hologram can be blinked at regular intervals.

On the other hand, while displaying the hologram, the control server 130 starts again from the above-described step S1105 to determine whether there is another vehicle in the left lane or the right lane in the analysis distance. If there is no other vehicle, The control server 130 turns off the displayed hologram. Then, the control server 130 returns to step S1103 again to analyze the speed of the vehicle in operation, and repeats the following process.

The operation described above is repeatedly performed until the vehicle enters the road tunnel 101 and leaves the road tunnel 101 until the vehicle is traced. On the other hand, the control server 130 generates a control screen including the driving situation of the vehicles in the road tunnel 101 and the operation status of the hologram display device 120, transmits the control screen to the administrator terminal 140 via the communication network, .

While the specification contains many features, such features should not be construed as limiting the scope of the invention or the scope of the claims. In addition, the features described in the individual embodiments herein may be combined and implemented in a single embodiment. Conversely, various features described in the singular < Desc / Clms Page number 5 > embodiments herein may be implemented in various embodiments individually or in combination as appropriate.

The method of the present invention as described above can be implemented by a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto optical disk, etc.). Such a process can be easily carried out by those skilled in the art and will not be described in detail.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings.

101: Road tunnel
102: lane
110: millimeter wave wave sensor
120: Hologram display
130: control server
140:
410: sensing information receiver
420: Vehicle running analysis section
430: Hologram display control unit
440: control screen generation unit

Claims (7)

delete A system for guiding an inter-vehicle safety distance in a road tunnel,
At least one millimeter wave wave sensor installed in a road tunnel to sense and transmit the vehicle;
A plurality of hologram display devices provided at predetermined intervals along a traveling direction in a lane in the road tunnel to output a hologram; And
The distance between the vehicle and the preceding vehicle in the same lane in the road tunnel is analyzed on the basis of the sensing information received from the at least one millimeter wave wave sensor, And a control server for displaying a red hologram by controlling a hologram display device positioned at a rear portion of the front vehicle among the plurality of hologram display devices installed in adjacent left and right lanes of the vehicle,
Wherein each of the plurality of hologram display devices is provided in a groove formed in the lane,
Each of the hologram display devices includes:
A first light emitting part provided on one surface of the groove and emitting a reference light, a first reflection part installed on the other surface facing the one surface of the groove and reflecting the reference light,
A second light emitting portion for emitting object light provided on the other surface of the groove, a second reflecting portion provided on the one surface and reflecting the object light, And
And a display unit for generating a hologram using the reference light reflected by the first reflecting unit and the object light reflected by the second reflecting unit. 3. The method of claim 2,
The control server,
A plurality of hologram display devices located within a second distance larger than the first distance and located at a first distance or more from the front vehicle ahead of the preceding vehicle among the plurality of hologram display devices provided in the adjacent lane of the preceding vehicle, Wherein a hologram is sequentially displayed from a hologram display device located at a long distance to a hologram display device located at a close distance from the hologram display device. The method of claim 3,
The control server,
And increases the first distance and the second distance as the speed of the front vehicle increases. 3. The method of claim 2,
The control server,
Even when the specific vehicle changes the lane by more than a threshold number of times for a predetermined time in the road tunnel based on sensing information received from the at least one millimeter wave wave sensor, the plurality of hologram displays Wherein at least one hologram display device located in front of the specific vehicle among the devices is controlled to display the hologram. 3. The method of claim 2,
The control server,
When there is another vehicle within a specific distance from the specific vehicle on the left or right lane of the specific vehicle in the road tunnel based on the sensing information received from the at least one millimeter wave wave sensor, Wherein at least one hologram display device installed in a lane between the specific vehicle and the other vehicle is controlled to display the hologram. The method according to claim 6,
The control server,
Increases the specific distance as the speed of the specific vehicle increases, and decreases the specific distance as the speed of the specific vehicle decreases.

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