KR102437282B1 - Smart portable street light device - Google Patents

Abstract

A smart mobile holding device includes a mobile base, an anchor for fixing the mobile base, a street lamp installed on the mobile base, a camera installed on the pole of the street lamp and photographing a specific area and tracking according to the movement of the object, A content object projection unit installed on the upper part of the pole of the street lamp and projecting projected content for pedestrian safety, and the lower part of the pole of the street lamp installed to face the moving direction of the vehicle and analyze the photographed specific area to obtain the object Recognize and determine whether the object corresponds to a crossing object to control the tracking of the camera for the crossing object, control the projection content of the object projection unit for the crossing object, and control the signage content of the display for the vehicle Including digital signage that performs

Description

Smart portable street light device {SMART PORTABLE STREET LIGHT DEVICE}

The present invention relates to smart mobile street light technology, and more particularly, to a smart mobile street light device capable of providing smooth passage of vehicles and pedestrians by managing the safety of an intersection using a smart street light installed near a crosswalk at an intersection will be.

In general, a lighting device such as a street lamp installed outdoors provides a space for securing sufficient visibility to passersby even in dark situations such as evening or night by projecting light to a certain area to form a lighting area.

As such, lighting devices installed in various places outdoors can show a clear difference in brightness compared to the dimmed ambient illuminance by irradiating light to create a predetermined bright environment. It can be used as an area that is easily recognizable even from afar.

As described above, a shadow advertisement technology in which a function of providing advertisements is added to a lighting device has been proposed by paying attention to the fact that a space within the lighting area through the lighting device can draw attention to people's eyes at night.

On the other hand, as an outdoor advertisement using a digital information display (DID), digital signage, which means a billboard capable of controlling advertisement contents through a communication network in a control center, is widely used.

Such digital signage may be installed in public or commercial spaces to provide various information and advertisements in real time. In particular, in recent years, the use of LEDs such as outdoor advertising boards and electric billboards using LEDs is rapidly increasing.

Korean Patent Registration No. 10-1324081 (2013.10.25)

An embodiment of the present invention is to provide a smart mobile street lamp device that can provide smooth passage of vehicles and pedestrians by managing the safety of the intersection using a smart street lamp installed near the crosswalk at the intersection.

An embodiment of the present invention is to provide a smart mobile street lamp device capable of quickly managing an intersection by effectively extracting the outline of an object by performing a difference operation between images.

Among the embodiments, the smart mobile holding device is installed on a movable base, an anchor for fixing the movable base, a street lamp installed on the movable base, and a pole of the street lamp, photographing a specific area, and tracking according to the movement of the object A camera that can do this, a content object projection unit that is installed on the upper part of the pole of the streetlight and projects projection content for pedestrian safety, and a specific area that is installed opposite to the direction of movement of the vehicle under the pole of the streetlight and is photographed Analyze to recognize the object and determine whether the object corresponds to a traversing object to control the tracking of the camera for the traversing object, control the projection content of the object projection unit for the traverse object and the display on the vehicle Includes digital signage to perform signage content control.

The digital signage generates the contour of the object by performing a difference operation between images within a specific time period with respect to the photographed specific region, and determines whether the object corresponds to the crossed object through the contour of the object. can recognize The digital signage generates first difference images between even-numbered images and second difference images between odd-numbered images with respect to images within the specific time interval, and the first and second difference images The contour of the crossed object may be generated through weighted cumulative summation of the intersecting objects.

The digital signage may record an accident possibility image of the crossing object through Pan-Tile-Zoom (PTZ) control of the camera when the crossing object is detected as a jaywalking object. When an accident of the crossing object is detected, the digital signage may provide the accident possibility image to the display through the control of the manager terminal.

The digital signage projects the projected content to the front direction of the crossing object when the crossing object is detected as a trespassing object, and projects trespassing alarm content toward the entry direction of the vehicle through the display as the signage content. The jaywalking alarm contents may be provided at the same time.

The digital signage determines whether the crossing speed or the remaining crossing time of the crossing object is less than or equal to a specific criterion when the crossing object is detected as a legal crossing object, and if so, the projected content is placed in the front direction of the object. can be projected.

The digital signage blinks an emergency message to be overlaid on the currently displayed signage content of the display and provides an emergency alarm message through a speaker when the crossing object is detected as a disaster object such as fire or explosion. can

The disclosed technology may have the following effects. However, this does not mean that a specific embodiment should include all of the following effects or only the following effects, so the scope of the disclosed technology should not be construed as being limited thereby.

The smart mobile street lamp device according to an embodiment of the present invention can provide smooth passage of vehicles and pedestrians by managing the safety of the intersection by using a smart street lamp installed near the crosswalk at the intersection.

The smart mobile street lamp device according to an embodiment of the present invention can effectively extract the outline of an object by performing a difference operation between images to quickly manage an intersection.

1 is a view for explaining a smart mobile street light system according to an embodiment of the present invention.
2 is a view for explaining the configuration of the smart mobile street light device in FIG.
3 is a view for explaining the functional configuration of the smart mobile street light device in FIG. 1 .
4 is a flowchart for explaining an embodiment of the operation of the smart mobile street light device.

Since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiment described in the text. That is, since the embodiment is capable of various changes and may have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, it should not be understood that the scope of the present invention is limited thereby.

On the other hand, the meaning of the terms described in the present application should be understood as follows.

Terms such as “first” and “second” are for distinguishing one component from another, and the scope of rights should not be limited by these terms. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component.

When a component is referred to as being “connected” to another component, it may be directly connected to the other component, but it should be understood that other components may exist in between. On the other hand, when it is mentioned that a certain element is "directly connected" to another element, it should be understood that the other element does not exist in the middle. On the other hand, other expressions describing the relationship between elements, that is, "between" and "between" or "neighboring to" and "directly adjacent to", etc., should be interpreted similarly.

The singular expression is to be understood to include the plural expression unless the context clearly dictates otherwise, and terms such as "comprises" or "have" refer to the embodied feature, number, step, action, component, part or these It is intended to indicate that a combination exists, and it should be understood that it does not preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

Identifiers (eg, a, b, c, etc.) in each step are used for convenience of description, and the identification code does not describe the order of each step, and each step clearly indicates a specific order in context. Unless otherwise specified, it may occur in a different order from the specified order. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

The present invention can be embodied as computer-readable codes on a computer-readable recording medium, and the computer-readable recording medium includes all types of recording devices in which data readable by a computer system is stored. . Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like. In addition, the computer-readable recording medium may be distributed in a network-connected computer system, and the computer-readable code may be stored and executed in a distributed manner.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Terms defined in the dictionary should be interpreted as being consistent with the meaning of the context of the related art, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present application.

1 is a view for explaining a smart mobile street light system according to an embodiment of the present invention.

Referring to FIG. 1 , the smart mobile street light system 100 may include a user terminal 110 , a smart mobile street light device 130 , and a database 150 . The smart mobile street light device 130 may include a mobile base 1010 , an anchor 1020 , a street light 1030 , a camera 1040 , a content object projection unit 1050 , and a digital signage 1060 .

The user terminal 110 may receive various information provided by the smart mobile street light device 130 , and may correspond to a computing device capable of exchanging interactions with the smart mobile street light device 130 . The user terminal 110 may be implemented as a smartphone, a notebook computer, or a computer, but is not limited thereto, and may be implemented in various devices such as a tablet PC. The user terminal 110 may be connected to the smart mobile street light device 130 through a network, and a plurality of user terminals 110 may be simultaneously connected to the smart mobile street light device 130 .

In addition, the user terminal 110 may include a camera module capable of capturing an image, and may install and execute a dedicated program or application for interacting with the smart mobile street light device 130 . In an embodiment, the user terminal 110 may include a manager terminal operated by a manager of an area where a street light is installed.

The smart mobile street light device 130 is a street light device installed near an outdoor area where a large number of people can use, such as a crosswalk at an intersection, and may correspond to a computing device to which an IoT-based smart function is applied. In addition, the smart mobile street lamp device 130 may be implemented as a server corresponding to a computer or program capable of recognizing an object entering or leaving an intersection area, providing related information to induce a specific operation, or performing various functions.

The smart mobile street light device 130 may be connected to the user terminal 110 through a wired network or a wireless network such as Bluetooth or WiFi, and may communicate with the user terminal 110 through the network. In addition, the smart mobile street light device 130 may operate in connection with an external system (not shown in FIG. 1 ), for example, may be connected to a weather system, an online system, an authentication system, a traffic system, and the like.

The smart mobile street light device 130 may be installed on the mobile base 1010 , and the anchor 1020 may fix the mobile base 1010 . Here, the anchor 1020 may be implemented as a separate pillar supporting the pillar of the street lamp 1030 or as a stake for fixing the movable base 1020 .

The street lamp 1030 may be installed on the movable base 1010 , and the camera 1040 may be installed on the pole of the street lamp 1030 , photograph a specific area, and track the movement of the object. The content object projection unit 1050 may be installed on a pole of the street lamp 1030 and may project projection content for pedestrian safety.

The digital signage 1060 is installed under the pole of the street lamp 1030, recognizes an object by analyzing a specific area, and determines whether the object corresponds to a crossed object set by the manager terminal to control the tracking of the camera 1040, Control of the projected content and control of the signage content for display may be performed.

The database 150 may correspond to a storage device for storing various types of information required in the operation process of the smart mobile street lamp device 130 . The database 150 may store information on a recognition model for object recognition and may store content information for providing content, but is not limited thereto, and the smart mobile street lamp device 130 performs intersection management. can store the collected or processed information in various forms.

2 is a view for explaining the configuration of the smart mobile street light device in FIG.

Referring to FIG. 2 , the smart mobile street light device 130 may be implemented to include a processor 210 , a memory 230 , a user input/output unit 250 , and a network input/output unit 270 .

The processor 210 may execute a procedure for processing each step in the process in which the smart mobile street light device 130 operates, and manage the memory 230 to be read or written throughout the process, and the memory ( 230) may schedule a synchronization time between the volatile memory and the non-volatile memory. The processor 210 may control the overall operation of the smart mobile street light device 130 , and is electrically connected to the memory 230 , the user input/output unit 250 , and the network input/output unit 270 to control the flow of data therebetween. can do. The processor 210 may be implemented as a central processing unit (CPU) of the smart mobile street light device 130 .

The memory 230 is implemented as a non-volatile memory, such as a solid state drive (SSD) or a hard disk drive (HDD), and may include an auxiliary storage device used to store overall data required for the smart portable street lamp device 130 and , it may include a main memory implemented as a volatile memory such as random access memory (RAM).

The user input/output unit 250 may include an environment for receiving a user input and an environment for outputting specific information to the user. For example, the user input/output unit 250 may include an input device including an adapter such as a touch pad, a touch screen, an on-screen keyboard, or a pointing device, and an output device including an adapter such as a monitor or a touch screen. In one embodiment, the user input/output unit 250 may correspond to a computing device connected through a remote connection, and in such a case, the smart mobile street light device 130 may be implemented as an independent server.

The network input/output unit 270 includes an environment for connecting with an external device or system through a network, for example, a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), and a VAN (Wide Area Network) (VAN). It may include an adapter for communication such as Value Added Network).

3 is a view for explaining the functional configuration of the smart mobile street light device in FIG. 1 .

Referring to FIG. 3 , the smart mobile street light device 130 may include at least a camera 1040 , a content object projection unit 1050 , a digital signage 1060 , and an emergency bell 1070 . In addition, the digital signage 1060 may include a tracking control module 371 , a content control module 373 , and a message control module 375 .

The street lamp 1030 may be installed and operated in an intersection area requiring unauthorized or legal crossing management. The street lamp 1030 may be implemented including a lighting device for the original function of the street lamp, and may be implemented and installed in various sizes and structures.

The camera 1040 may be installed on the pole of the street lamp 1030 , and may perform tracking according to the movement of an object by photographing a specific area. The specific area may correspond to a spatial area defined on a movement path through which people move for traversing. For example, the specific area may correspond to a spatial area including a passage for entering and exiting a crosswalk at an intersection. Accordingly, the camera 1040 may photograph an object moving in the corresponding passage, for example, a pedestrian or a vehicle, and recognize the corresponding image or an object captured in the image through image analysis or image analysis technique. In addition, the camera 1040 may perform an operation of tracking the movement path of the recognized object, and may perform operations such as generating location information and recording the movement path by tracking the movement of the object in a specific area.

According to an embodiment, the camera 1040 may adjust the shooting direction or size according to the situation through Pan-Tilt-Zoom (PTZ) control and provide it.

The content object projection unit 1050 may be installed and operated near the camera 1040 on the top of the pole of the street lamp 1030 , and may include a beam projector for projecting the projected content in a specific direction. The projected content may include advertisements, images, videos, and the like, and may include various pieces of information necessary for cross-management of the corresponding place depending on the place where the street lamp 1030 is installed. That is, the content object projecting unit 1050 may play a role of providing various contents to pedestrians in a space in which the street lamp 1030 is installed by using a projection type projector.

In one embodiment, the content object projection unit 1050 may be implemented by including a PTZ (Pan-Tilt-Zoom) controller capable of adjusting the projection direction. That is, the content object projection unit 1050 may adjust and provide the projection direction or size of the projected content according to the situation.

The digital signage 1060 may be installed under a pillar of a street lamp to face the moving direction of the vehicle, and may operate in conjunction with the camera 1040 and the content object projection unit 1050 . The digital signage 1060 may be installed toward the direction in which the vehicle is approaching to notify the vehicle of an event (eg, trespassing) occurring on the crosswalk. More specifically, the digital signage 1060 may recognize an object by analyzing an image and an image for a specific area in conjunction with the camera 1040, and the object recognized based on the analysis is a crossed object set by the manager terminal You can decide whether or not Here, the crossing object may correspond to an object that needs to collect information on movement for crosswalk management, and may include, for example, attention figures such as children, the elderly, and the like among pedestrians and vehicles.

That is, the digital signage 1060 analyzes a specific area to recognize an object, and determines whether the object corresponds to a crossing object set by the manager terminal to control the tracking of the camera 1040 for the crossing object, for the crossing object Projection content control of the object projection unit 1050 and signage content control of a display for a vehicle may be performed, and may be implemented by including independent modules performing each of these operations.

The digital signage 1060 may project a warning message (or image) for the identified object in association with the content object projection unit 1050 and a caution message (or image) when crossing.

When the crossing object is detected as a jaywalking object, the digital signage 1060 may project the trespassing alarm content as a warning message to the entry direction of the vehicle to provide attention to the driver of the vehicle. In addition, the digital signage 1060 may rotate the display in the direction of the pedestrian to provide the trespassing prohibition content as the signage content as a warning message.

The digital signage 1060 may record an accident potential image of the crossing object through the Pan-Tile-Zoom (PTZ) control of the camera 1030 when the crossing object is detected as a jaywalking object. When an accident of a crossing object is detected, the digital signage 1060 may provide an accident possibility image to the display through the control of the manager terminal. In an embodiment, the digital signage 1060 may notify the manager terminal of the accident of the crossing object when the control of the manager terminal is not received.

The digital signage 1060 projects the projected content to the front direction of the crossing object when the crossing object is detected as a trespassing object, and the tampering alarm content as signage content toward the entry direction of the vehicle through the display. can be provided simultaneously.

The digital signage 1060 determines whether the crossing speed or the remaining crossing time of the crossing object is less than or equal to a specific criterion when the crossing object is detected as a legal crossing object, and if so, the projected content is displayed in the front direction of the crossing object. can be projected

In addition, the digital signage 1060 blinks an emergency message to be overlaid on the currently displayed signage content of the display when the crossing object is detected as a disaster object, such as a fire or explosion, and sends an emergency alarm message through a speaker. can provide

More specifically, the digital signage 1060 includes a tracking control module 371 for tracking control of the camera 1040, a content control module 373 for controlling projected content, and a message control module for controlling management messages ( 375) can be implemented.

In one embodiment, the smart mobile street light device 130 may be implemented to include an emergency bell (1070). The emergency bell 1070 may be installed and operated under the street lamp 1030, and may start operation by human manipulation. In this case, the digital signage 1060 detects the operation of the emergency bell 1070, blinks the emergency message to be overlaid on the currently displayed display content of the display, and provides the emergency alarm message through the speaker. have.

That is, the smart mobile street light device 130 is not limited to providing functions such as simple information provision or alerting, and may also provide a function for notifying a specific user of a danger in an emergency situation or requesting help from nearby people. . The smart mobile street light device 130 may be implemented by including a display that reproduces an image, and when an operation through the emergency bell 1070 is detected, an emergency message may be reproduced to be overlaid on the currently played content. In this case, an emergency message may be output in a blinking state for concentration of attention.

In one embodiment, the digital signage 1060 may turn off the projected content to increase the readability of the display. That is, when the occurrence of an emergency situation is detected through the emergency bell 1070 , the digital signage 1060 may provide an emergency message through the display, and at this time, the projection being projected by the content object projection unit 1050 By turning off the content, it is possible to increase the exposure effect of the emergency message.

In one embodiment, the digital signage 1060 creates a management form for the crossing object through the administrator terminal and controls the tracking, the projection content, the control of the signage content, and the speaker through the management attribute in the management form. control can be set. The smart mobile street light device 130 may operate in conjunction with a manager terminal, and the manager may set a management plan through the manager terminal.

That is, the administrator can designate a cross-section object according to the management form (or management interface) provided by the digital signage 1060, specify the type and content of the projected content, and set the operation time or playback interval of the display. can In addition, the administrator can set whether or not the speaker is reproduced, the volume, and the like as specific numerical values. For example, the administrator can set the control of the projected content to [None] in the state where the pedestrian is designated as the crossing object, designate the management message through the control of the display, and designate the alarm message through the control of the speaker. In this case, when the pedestrian is identified, the smart mobile street light device 130 ends the projection of the projected content while tracking the pedestrian, outputs a management message set through the display, and plays an alarm message associated with the pedestrian through the speaker. can

In an embodiment, the digital signage 1060 may request the manager terminal to write a management message or an alarm message when control of a display or control of a speaker is performed.

In an embodiment, the digital signage 1060 generates the contour of an object by performing a difference operation between images within a specific time period for a specific photographed area, and the object corresponds to a crossed object through the contour of the object. can recognize whether or not For example, the digital signage 1060 may identify an object as a result of mutual comparison of images taken for a specific time. In particular, information on the outline of the object is obtained by removing a background image excluding the object through a difference operation. can be obtained In addition, the digital signage 1060 may determine whether the object is a cross-section object by comparing the information on the outline of the object with the cross-section object stored in the database 150 .

In one embodiment, digital signage 1060 generates first difference images between even-numbered images and second difference images between odd-numbered images with respect to images that are within a specific time interval, the first and The contour of the object may be generated through weighted cumulative summation between the second difference images. More specifically, the digital signage 1060 may classify even-numbered images and odd-numbered images based on images continuously photographed for a specific time period, and a first difference image through comparison between even-numbered images. can create In addition, the digital signage 1060 may generate second difference images through comparison between odd-numbered images, and quickly and efficiently generate the outline of a traversing object through weighted cumulative summation between the first and second difference images. can do.

In an embodiment, the digital signage 1060 may track the movement of an object within a specific area, and may calculate a movement speed of the object. The digital signage 1060 may change the projection direction and projection size of the projected content according to the moving speed of the corresponding object. For example, as the moving speed of the object increases, the projection direction of the projected content may be set to point further away from the current position in the moving direction, and the projection size of the projected content may increase. In addition, the digital signage 1060 may set the blinking speed of the management message reproduced on the display to be faster according to the moving speed of the corresponding object, and set the volume of the speaker to be higher.

In one embodiment, the digital signage 1060 determines the boundary of the specific area based on the moving speed of the object identified in the specific area, the projection angle of the projected content, the projection size, the blinking speed of the management message, and the volume of the speaker. It is possible to calculate the playback time of the display based on the deviation time point. The digital signage 1060 may calculate the playback time of the display based on the following equations regarding the moving speed of the object, the projection angle of the projected content, the projection size, the blinking speed of the management message, and the volume of the speaker.

[Equation]

Here, t may be a reproduction time of the display, k may be a proportional coefficient, and v and b may correspond to a moving speed and a blinking speed, respectively. s is the projection size, a is the projection angle, h is the height of the content object projection unit, l may correspond to the volume of the speaker. That is, the playback time of the display may be determined according to the difference between the moving speed of the object and the blinking speed, and may increase as the projection size is large, the height of the content object projection unit is low, and the projection angle is small. Also, the playback time of the display may increase as the volume of the speaker increases. In addition, the proportionality coefficient k may be set to cancel the correlation between the units of each variable, and the reproduction time of the display may be set to be determined by the time in units of seconds (s).

4 is a flowchart for explaining an embodiment of the operation of the smart mobile street light device.

Referring to FIG. 4 , the smart mobile street lamp device 130 may identify an object by photographing a specific area through the camera 1030 (step S410 ). In addition, the smart mobile street lamp device 130 may project the projection content corresponding to the identified object through the content object projection unit 1050 (step S430). In this case, the projected content may be reproduced in a specific area on the movement path, or may be reproduced on a screen formed on the wall of a building according to the projection direction. In addition, the smart mobile street light device 130 may track the object identified through the digital signage 1060 or display a management message related to the object (step S450).

In one embodiment, the smart mobile street light device 130 identifies various objects passing through the installed neighborhood of the street light 1030 and provides projected content and management messages in real time for movement management of the corresponding place, environment management, etc. . The smart mobile street light device 130 may dynamically change and provide the projected content and the management message according to the movement of the object, and may selectively provide the projected content and the management message according to the identification information of the object.

In addition, the smart mobile street light device 130 may detect the user terminal 110 passing through the crosswalk, and may provide the projected content or management message in the form of a notification message through the user terminal 110 . In addition, the smart mobile street lamp device 130 may provide the user terminal 110 with a link accessible to the publicity and advertisement page for the corresponding place. In this case, the link may be converted into a QR code and provided, and the user may share the link with other users.

Although the above has been described with reference to the preferred embodiments of the present application, those skilled in the art can variously modify the present application within the scope without departing from the spirit and scope of the present invention described in the claims below. and may be changed.

100: smart street light system
110: user terminal 130: smart mobile street light device
150: database
210: processor 230: memory
250: user input/output unit 270: network input/output unit
1010: base 1020: anchor
1030: street light 1040: camera
1050: content object projection unit 1060: digital signage
371: tracking control module 373: content control module
375: message control module 1070: emergency bell

Claims (8)

mobile base;
an anchor for fixing the movable base;
a street lamp installed on the movable base;
a camera installed on the pole of the street lamp and capable of photographing a specific area and tracking the movement of an object;
a content object projection unit installed on the pole of the street lamp and projecting projection content for pedestrian safety;
a display that reproduces images; and
It is installed under the pillar of the street lamp to face the moving direction of the vehicle, analyzes the photographed specific area to recognize the object, and determines whether the object corresponds to a crossed object to control the tracking of the camera for the crossed object , including a digital signage for performing projection content control of the object projection unit for the crossing object and signage content control of the display for the vehicle,
The digital signage
First difference images between even-numbered images and second difference images between odd-numbered images are generated by performing a difference operation between images within a specific time interval with respect to the photographed specific region, and the first and A smart mobile street lamp device, characterized in that it generates the contour of the object through weighted cumulative summation between second difference images, and recognizes whether the object corresponds to the crossed object through the contour of the object.
delete delete According to claim 1, wherein the digital signage
Smart mobile street light device, characterized in that when the crossing object is detected as a jaywalking object, the image of the possibility of an accident of the crossing object is recorded through the PTZ (Pan-Tile-Zoom) control of the camera.
According to claim 4, wherein the digital signage
When an accident of the crossing object is detected, the smart mobile street lamp device, characterized in that it provides the accident possibility image to the display through the control of the manager terminal.
According to claim 1, wherein the digital signage
When the crossing object is detected as a trespassing object, project the projected content to the front direction of the crossing object, and the trespassing alarm content as the signage content toward the entry direction of the vehicle through the display. A smart mobile street light device, characterized in that it provides at the same time.
According to claim 1, wherein the digital signage
When the crossing object is detected as a legal crossing object, it is determined whether the crossing speed or the traversing remaining time of the crossing object is less than or equal to a specific criterion, and if so, the projection content is projected in the front direction of the object Smart portable street light device.
According to claim 1, wherein the digital signage
Smart characterized in that when the crossing object is detected as a disaster object such as fire or explosion, an emergency message is overlaid on the currently displayed signage content of the display, and an emergency alarm message is provided through a speaker mobile street light device.

Images