Patent Publication Number: US-2019178676-A1

Title: System and method for providing navigation service of disabled person

Description:
BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a system and a method for providing navigation service for disabled people, and more particularly to a system and a method for crawling information necessary for free movement of a wheelchair on a road, generating a database in which corresponding road information is reflected, and providing navigation service based on the generated database. 
     Related Art 
     Recently, there are increasing demands for geographical information systems which provides information about a path to a desired destination or which helps a user to search for a facility, such as a navigation system, a Global Positioning System (GPS) system. Thus, more sophisticated relevant technologies have been developed to improve a user&#39;s convenience. 
     There are also increasing demands for technologies which provides geographical information for elder or disabled people, but such technologies have long way to go. 
     To enable disabled people, such as wheelchair users, to access and utilize location-based geographical information, there has been proposed a navigation system for wheelchair, as disclosed in Japanese Patent Application Publication No. 2007-139486. 
     Discovering a curb or a steep slope and finding a safe path is the biggest challenge for wheelchair users to move. 
     The wheelchair users needs to avoid a curb, a steep uphill or downhill, an uneven ground surface, and an area or building only having stairs rather than a ramp. 
     SUMMARY OF THE INVENTION 
     To solve the above problem, the present invention provides a system and a method for providing navigation service for disabled people, the system and method which crawl information necessary for free movement of a wheelchair on a road, generate database in which corresponding road information is reflected, and provide a navigation service based on the generated database. 
     In one general aspect, there is provided a system for providing navigation service for disabled people, the system comprising: a navigation device ( 100 ) configured to receive navigation map information, comprising information about a path to an arbitrary destination and disabled facility Point Of Interest (POI) information, from a service server ( 200 ), display the received navigation map information, and transmit movement information based on a Global Positioning System (GPS) signal to the service server ( 200 ); the service server ( 200 ) configured to transmit navigation map information, comprising found information about a path to the arbitrary destination and disabled facility POI information provided by the POI management server ( 300 ), to the navigation device ( 100 ), and transmit the movement information, received from the navigation device ( 100 ), to a POI management server ( 300 ); the POI management server ( 300 ) configured to generate disabled facility POI map information, which matches road information, by analyzing collected disabled facility POI information, provide the generated disabled facility POI map information to the service server ( 200 ), manage the navigation map information so that error information which is found during analysis of movement information of the navigation device ( 100 ) transmitted from the service server ( 200 ) is reflected in the navigation map information; and a crawling unit ( 400 ) configured to input disabled facility POI information, collected online and offline, to the POI management server ( 300 ). 
     The disabled facility POI information may include at least one of the following: information about a braille block on a road, information about a height of a curb, information about a building ramp, information about a toilet, and information about an elevator. 
     The crawling unit ( 400 ) may include: an online information collector ( 410 ) configured to analyze road view images provided from an arbitrary portal server connected over a network, extract location information of a braille block on a road and height information of a curb, and provide the location information and the height information to the POI management server  300 ; and an offline information collector ( 420 ) configured to extract information about a building ramp, information about a toilet, and information about an elevator, and provide the extracted information to the POI management server ( 300 ). 
     In another general aspect, there is provided a method of providing navigation service for disabled people, the method comprising: a) generating, by a Point Of Interest (POI) management server ( 300 ), a database by collecting disabled facility POI information using a crawling unit ( 400 ), and updating the database by reflecting road information in the generated database; b) when an arbitrary navigation device ( 100 ) accesses a service server ( 200 ) to request provision of navigation map information, generating, by the service server ( 200 ), navigation map information and transmitting the generated navigation map information to the navigation device ( 100 ), wherein the navigation map information comprises found information about a path to a destination and disabled facility POI information provided by the POI management server  300 ; and c) when the service server receives the movement information of the navigation device ( 100 ), transmitting, by the service server ( 200 ), the received movement information of the navigation device ( 100 ) to the POI management server ( 300 ), and, when error information is found during analysis of the movement information of the navigation device ( 100 ), reflecting, by the POI management server ( 300 ), the found error information in disabled facility POI map information. 
     In step a), the crawling unit ( 400 ) may be further configured to: access an arbitrary portal server over a network, and extract location information of a braille block on a road and height information of a curb by analyzing road view images provided from the portal server; and extract information about a building ramp, information about a toilet, and information about an elevator by analyzing an image captured at an arbitrary POI. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a block diagram illustrating a system for providing a navigation service for disabled people according to the present invention. 
         FIG. 2  is a flowchart illustrating a method for providing service using a system for providing navigation service for disabled people according to the present invention. 
         FIG. 3  is a flowchart illustrating a procedure of collecting Point of Interest (POI) data in the method for providing service using a system for providing a navigation service for disabled people, as shown in  FIG. 2 . 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Hereinafter, embodiments of a system and a method for providing navigation service for disabled people according to the present invention will be described with reference to the accompanying drawings. 
     It will be understood that the terms “comprises,” “comprising,” “includes,” and/or “including,” when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof unless otherwise defined. 
     In addition, the terms ‘part,’ ‘unit,’ and ‘module’ in the specification may represent a unit for processing at least one function or operation and may be a software component or a hardware component, and or a combination of hardware and software. 
       FIG. 1  is a block diagram illustrating a system for providing navigation service for disabled people according to the present invention;  FIG. 2  is a flowchart illustrating a method for providing navigation service using a system for providing navigation service for disabled people according to the present invention; and  FIG. 3  is a flowchart illustrating a procedure of collecting a Point of Interest (POI) the method for providing service using a system for providing a navigation service for disabled people, as shown in  FIG. 2 . 
     Referring to  FIGS. 1 to 3 , a system  100  for providing navigation service according to the present invention includes a navigation device  100 , a service server  200 , a POI management server  300 , and a crawling unit  400 . 
     The navigation device  100  may access the service server over a wireless network, and display location information on a map using a Global Positioning System (GPS) signal. In addition, when a user inputs information about an arbitrary destination to transmit the information to the service server  200 , the navigation device  100  may receive navigation map information, which includes information about a path to the destination, from the service server  200  and display the received information. The navigation device may be composed of a plurality of devices, such as a navigation device 1  110 , a navigation device 2  120 , . . . and a navigation n  130 . 
     In addition, while moving based on the navigation map information, the navigation device  100  may transmit movement information of the navigation device  100  based on a GPS signal to the service server  200 . 
     That is, the navigation device  100  may detect guidance error between the movement information provided by the navigation device  100  and path guidance information transmitted by the service server  200 , path departure, information about location discrepancy of a disabled facility POI, etc. Then, the navigation device  100  may transmit information about the detection. 
     Upon receiving information about a path to a destination requested by the navigation device  100 , the service server  200  may search a map database (not shown) for the information about a path to the destination. 
     In addition, the service server  200  may receive disabled facility POI information provided by the POI management server  300  connected over a network, generate navigation map information by incorporating the received information with the found information about the path to the destination, and transmit the generated navigation map information to the navigation device  100 . 
     The navigation map information may be displayed on map information provided in an arbitrary format along with a path. In this case, the navigation map information may include information about a sidewalk, information about a crosswalk, location about an elevator for an overpass or an underpass, and location information about a wheelchair lift, so that a wheelchair user is enabled to move. 
     In addition, the navigation map information may be provided along with a path including areas where curbs are determined low enough for a wheelchair user to pass over based height information of the curbs. 
     In addition, the navigation map information may be transmitted in the form of two-dimensional (2D) or three-dimensional (3D) information, and include latitude and longitude information. 
     In addition, the service server  200  may receive movement information transmitted from the navigation device  100 , and transmit the received movement information to the POI management server  300 . 
     The POI management server  300  may analyze disabled facility POI information collected by the crawling unit  400 , and generate disabled facility POI map information which matches pre-stored road information. 
     In addition, the POI management server  300  may provide the generated disabled facility POI map information to the service server  200  connected over a network. If error information is found during analysis of movement information transmitted from the service server  200 , the POI management server  300  may reflect the found error information in the disabled facility POI map information so as to periodically update the disabled facility POI map information. 
     That is, the POI management server  300  may detect guidance error between the movement information provided by the navigation device  100  and path information transmitted by the service server  200 , path departure, information about location discrepancy of a disabled facility POI, etc. Then, the POI management server  300  may compare the detected information with information items set in disabled facility POI map information, and then modify the disabled facility POI information depending on a result of the comparison. 
     The crawling unit  400  may distinguish disabled facility POI information by analyzing road view images, which are collected online and offline, together with information about a random image. Then, the crawling unit  400  may input the distinguished disabled facility POI information to the POI management server  300 . The crawling unit  400  may include an online information collector  410 , and an offline information collector  420 . 
     The online information collector  410  may receive road view images provided from any server connected over a network, and identify an image of a braille block and an image of a curb using a pre-stored image processing program. The online information collector  410  may extract location information of the braille block and height information of the curb from images respectively identified as the braille and the curb, and may provide the location information and the height information to the POI management server  300 . The online information collector  410  may be composed of an open Application Programming Interface (Open API), a web crawler, etc. 
     That is, a braille block is distinguished and extracted based on its standardized shape and unique color (yellow), and a curb is distinguished and extracted based on a road color, a traffic line, the curb&#39;s shape, and a step from a road. 
     In addition, the online information collector  410  may transmit the extracted disabled facility POI information to the POI management server  300  together with POI information about a nearby building. 
     The offline information collector  420  may transmit information about an image, which is captured by a photographing means such as a camera using current location information based on a GPS signal, to the POI management server  300  over a wireless network. The offline information collector  420  may extract POI information of disabled facilities, such as a building ramp, a toilet entrance, and an elevator, from an image captured at an arbitrary POI, such as a specific building, a pedestrian overpass, an underpass, a public toilet, and a subway station. Then, the offline information collector  420  may provide the extracted POI information of disabled facilities to the POI management server  300  along with location information of the extracted POI information of disabled facilities. 
     The POI information of disabled facilities includes information about a braille block on the road, height information of a curb, information about a building ramp, information about a toilet, and information about an elevator. However, the POI information of disabled facilities is not limited thereto, and various types of disabled facilities may be used as POI information. 
     Following is description about a method of providing service by a system for providing navigation service for disabled people according to the present invention. 
     The POI management server  300  stores POI information of disabled facilities, which is collected by the crawling unit  400 , in a database in S 100 . 
     In Step S 100 , the crawling unit  400  collects road view images provided from an arbitrary portal server connected over a network using the online information collector  410  composed of an open API, web crawler, etc.; identifies a braille block and a curb on a road using the pre-stored image processing program; extracts location information of the braille block and height information of the curb from images respectively identified as the braille block and the curb; and store the extracted POI information and location information of disabled facilities in the database in S 110 . 
     In addition, in Step S 100 , the crawling unit  400  extracts POI information of disabled facilities, such as a building ramp, a toilet entrance, and an elevator, from an image captured at an arbitrary POI, such as a specific building, a pedestrian overpass, an underpass, a public toilet, and a subway station, using the offline information collector  420 ; and stores the extracted location information about the POI information of disabled facilities in the database in S 120 . 
     After Step S 100 , the POI management server  300  may update information by reflecting the POI information of disabled facilities and road information in a stored database, and generate POI map information of disabled facilities using the updated information in S 200 . 
     The POI map information of disabled facilities generated in Step S 200  is provided to the service server  200 , and the service server  200  detects a request for navigation service in S 300 . 
     If an arbitrary navigation device  100  accesses the service server  200  to request provision of navigation map information in Step S 300 , the service server  200  may search pre-stored map information for information about a path to a destination input to the navigation device  100 , generate navigation map information including the found information of the path and POI map information of disabled facilities provided by the POI management server  300 , and transmit the generated navigation map information to the navigation device  100  in S 400 . 
     After Step S 400 , the service server  200  may movement information of the navigation device  100  while providing navigation service, and transmit the received movement information of the navigation device  100  to the POI management server  300 . 
     The POI management server  300  analyzes the movement information of the navigation device  100  in S 500 . 
     If various types of error information, such as a guidance error, path departure, and location discrepancy of a disabled facility POI, are found from the movement information of the navigation device  100 , the POI management server  300  may analyze the found error information and reflect a result of the analysis in disabled facility POI map information. 
     Therefore, by crawling information necessary for free movement of a wheelchair on a road or a sidewalk and providing navigation service in which corresponding road information is reflected, it is possible to enable a disabled person to safely move or reach a specific destination. 
     Although the preferred embodiment of the present invention has been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. 
     The reference numbers in the claims of the present invention are provided for the sake of clarity and convenience in explanation. It should be noted that the drawings are not to precise scale and may be exaggerated in thickness of lines or size of components for descriptive convenience and clarity. Furthermore, the terms used herein are defined by taking functions of the present invention into account and can be changed according to the custom or intention of users or operators. Therefore, definition of the terms should be made according to the overall disclosures set forth herein. 
     The present invention may crawl information necessary for free movement of a wheelchair on a road or a sidewalk, generate a database in which corresponding road information is reflected, and provide navigation service based on the generated database, so that a disabled person is enabled to move safely.