KR20060024882A - Navigation guidance method for car and extraction method of the guidance information - Google Patents

Abstract

The present invention relates to a vehicle navigation guidance method and route guidance information extraction method for the guidance of the intersection of the similar shape, the branch point.

According to the present invention, there is provided a vehicle navigation guidance method and route guidance information extraction method for route guidance which can lead to more accurate route guidance in a complex intersection when a route having a similar rotational shape exists on an adjacent intersection. The vehicle navigation guidance method for guiding a route according to the present disclosure provides guidance information to a user on a road which is likely to deviate at the time of following a route of the user, such as an intersection or a branching point that is adjacent to each other, thereby facilitating the path following.

In addition, the present invention can respond to the complex intersection judgment criteria only in the configuration of the map without applying separately, so that a separate area on the map and reconstruct the information in order to configure the existing supernode (supernode) As it can be removed, it reduces the cost of mapping.

Neighboring intersections, directions, voice prompts, icons

Description

Navigation guidance method for car and extraction method of the guidance information}

1 shows an example of an intersection generally displayed.

2 is a view schematically showing a display of a route guidance screen of a compound intersection according to the prior art.

3 shows an embodiment of an adjacent intersection on a road.

4 is a block diagram showing the structure of a vehicle navigation guidance system in accordance with the present invention;

5 is a flowchart illustrating a process of extracting adjacent intersection guidance information when reconstructing route guidance information according to the present invention.

6 is a flow chart showing a guide process for an adjacent intersection in accordance with the present invention.

<Description of Signs of Major Parts of Drawings>

120: vehicle navigation guidance device 121: route guidance / departure determination unit

122: search path receiving unit 123: path search unit

124: geographic information supply unit 125: vehicle location information receiving unit

126: vehicle driving information extraction unit 131: route search server

133: communication server 135: GPS satellites

The present invention relates to a vehicle navigation guidance method and route guidance information extraction method for the guidance of the intersection of the similar shape, the branch point.

The vehicle navigation system is a device that calculates a route to guide the vehicle to a destination to which the driver wants to arrive, and transmits a driving instruction from the driver in consideration of the current position and driving direction of the vehicle so as to drive the vehicle in the calculated route. .

GPS, which is recently used in the Global Positioning System (GPS), is a satellite navigation system originally developed by the U.S. Department of Defense, and after receiving radio signals generated from 3-4 satellites equipped with atomic frequencies, By measuring the distance to the satellite from the propagation time, it is possible to measure the velocity using the Doppler effect of three-dimensional (or two-dimensional) positioning and propagation.

The system was originally developed for military use, but then transmits measurement radio waves, including distance errors, from satellites for civilian use, taking into account the value of use of civilian vehicles.

By using the GPS satellite signal as described above, it can be applied to the navigation system to obtain information about vehicle operation such as distance and time to the destination.

In general, the structure of the navigation system for a vehicle using GPS is generally that when a satellite signal is input through a GPS omni directional antenna installed on the outside of the vehicle, the high frequency signal is input to a GPS tuner so that signals about latitude and longitude are received. Is output.

The signal is processed by the central processing unit together with the rotation signal of the wheel and the data coming through various sensors of the vehicle to obtain the estimated time of arrival, and the result is displayed on the display.

Conventional vehicle navigation systems can be divided into a route search method and a route guidance method. The route searching method includes a method of calculating a route inside the vehicle using only geographic information and location information mounted on the vehicle, and a method of receiving information calculated by a remote server by transmitting vehicle location information.

The route guidance method may include a method of indicating driving information for following a route and a method of providing surrounding geographic information along with a route indication.

The method for receiving information calculated by the remote server by transmitting the vehicle location information of the route search method may include various information such as real-time traffic information in selecting a route, but all route derivable information depends on reception from the server. It has a constraint at points.

In addition, when the method of receiving the information calculated by the remote server through the transmission of the vehicle location information is applied, since the vehicle does not hold the geographical information around the route, the driving information for the path following in the guidance method is followed.

Conventional vehicle navigation systems generally display the surrounding information of the numerical map for navigation directly according to a route guidance method for displaying the surrounding map and providing the surrounding geographic information along with the route instruction capable of performing a map search. To provide intersection information.

The method of receiving the calculated information from the remote server by the vehicle location information transmission according to the route search and guidance method of guiding the intersection information to the user and the method of indicating driving information for following the route do not display the surrounding map. Therefore, there is a limiting factor to perform the intersection guidance with guidance guidance.

Although the route guidance time point and the guidance method are maintained in the conventional manner, the criterion for the intersection must be clearly defined in order to display the corresponding intersection on the screen for the driving instruction instead of the surrounding map information.

1 is a diagram illustrating an example of an intersection generally displayed. As shown in this figure, an intersection, which is generally determined as one intersection, is represented by a network of roads of a navigational numerical map, which is a simple intersection composed of one node and a multiple intersection composed of a plurality of nodes. Expressed as an intersection. Here, the complex intersection is represented according to a traffic network inside the intersection, geographical requirements, and a form in which the surrounding sub-road network is incorporated at the actual intersection.

Since the expression of the simple intersection presupposes the display of the surrounding map, the criterion for the situation of the complex intersection is not reflected, and only the icon for the rotation instruction is displayed auxiliary.

However, in the case of the turn-by-turn method, since there is no separate method except for displaying the surrounding road conditions through the intersection pattern, it is difficult to transmit appropriate information to the driving guide using the rotation icon.

2 is a diagram schematically illustrating a display of a route guidance screen of a complex intersection according to the related art. As shown in the drawing, the complex intersection is configured to be applicable to a standardized map format for structuring complex intersection information, but the actual criterion of generating a complex intersection node is not a rotation intersection that is actually a target for guidance. Because of grouping areas, it is inappropriate to represent one intersection when applied to actual guidance.

In addition, the composite intersection includes a supernode as one representative node, which has a single location information and a cost, and includes an internal road network as an attribute.

That is, the supernode is also used for route search and guidance to one node. On the other hand, in a communication-based turn-by-turn vehicle navigation guidance apparatus, a search path received from a server instead of a numerical map for navigation included in a CD / DVD including a large amount of geographic information is used. Since it is stored in the form of link sequence and used for route guidance, it is difficult to extract the search route and guide data composed of general nodes and links by decomposing the corresponding supernode in order to apply only the route guidance representation. Is generated.

In addition, conventionally, it is assumed that the display of the surrounding map for the expression of the intersection, but because the determination criteria for the situation of the complex intersection is not reflected, only the icon for the rotation instruction is displayed as an auxiliary, so in the case of the TBT method, the surrounding road situation is the intersection. Since there is no separate method other than displaying through a pattern, it is difficult to transmit appropriate information for driving guidance.

Therefore, the conventional map guidance method and the TBT guidance method has a problem of causing confusion in guiding a part of the road which may cause confusion because it provides a simple rotation guidance to the user.

The present invention has been made to solve the above problems, and in particular, a vehicle navigation guidance method for guiding a route which can lead to a more accurate route guidance in a complex intersection when a route having a similar rotational shape exists on an adjacent intersection. And a method for extracting route guidance information.

In order to achieve the above object, the method for extracting route guide information according to the present invention comprises: receiving search route information from a current location to a destination when destination information is received from a user; Extracting an intersection node within a threshold distance by scanning each link from a current location to a destination using the search path information; Making a node existing on a route line before a destination at an intersection within the extracted threshold distance as an adjacent intersection; And extracting guide information for the adjacent intersection.

The adjacent intersections may be managed by granting a compound intersection attribute.

In the case of a point within the same compound intersection at the intersection node within the extracted threshold distance, the intersection is not designated as an adjacent intersection.

When the destination information is received from the user, receiving search path information from the current location to the destination, wherein when the map is changed, the search path information from the current location to the destination is re-received.

The guide information is an enlarged map or an intersection rotation icon.

In addition, the vehicle navigation guidance method for route guidance according to the present invention in order to achieve the above object, the step of receiving destination information from the user; Extracting a route line by comparing the current position of the vehicle with the destination; Extracting adjacent intersections on the route lines; Preparing the adjacent intersection information and the guidance screen when the vehicle approaches the adjacent intersection; Providing voice guidance based on the location of the intersection adjacent to the vehicle; And extracting and displaying a map enlargement diagram or an intersection rotation icon for the adjacent intersection.

Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

3 shows an embodiment of an adjacent intersection on a roadway.

As shown in FIG. 3, a path that the vehicle intends to travel at similar intersections A and B adjacent to each other is similar.

Adjacent intersections are defined as follows on the basis of a guided route on a map composed of roads as described above.

First, the adjacent intersection node is selected. By selecting the intersection node within the threshold distance based on the actual guide point, the node existing on the path line before the guide point is selected and the node is located in the straight direction based on the guide point entry connection angle. Select a node to play.

In addition, the guide information for each link of the intersection node is configured. The expected guide information for the access link is extracted from the intersection selected as a candidate, the intersection is calculated based on the entry criteria for the intersection before the guidance point, and the intersection after the guidance point. Calculate based on the entry direction of the straight link connection.

In the case of a candidate intersection that is the same as the guidance of the route guidance point as compared with the guidance of the actual guidance point, it is incorporated as a guidance target.

The route guidance information is implanted in the guide information to give a complex intersection attribute to the guide target link.

Since the above-described adjacent intersection extraction process is guide information configured according to the search path, the process is performed immediately after the path search and in the process of reconstructing the path guide information.

4 is a block diagram showing the structure of a vehicle navigation guidance system according to the present invention.

As shown in FIG. 4, a vehicle navigation guidance system for inducing vehicle navigation using a GPS satellite and an autonomous navigation device in a vehicle.

The GPS satellite receives a location signal to obtain additional information necessary for the location and navigation of the vehicle, and uses the output of a gyro or a speedometer to guide the independent navigation.

The vehicle navigation guidance system is configured to obtain the location, geographic information, and driving information of a moving vehicle by a GPS satellite 135 and a vehicle navigation guidance device 120 including self-supported navigation in a vehicle.

That is, the geographical information and the traffic information are supplied from the far path search server 131 for the far path search around the moving vehicle.

The long distance search server 131 transmits traffic information and geographical information to a communication server 133 for providing geographic information and traffic information to the vehicle navigation guidance apparatus 120, and the communication server 133 is authorized. The received traffic information and geographic information are transmitted to the search path receiving unit 122 of the vehicle navigation guidance apparatus 120.

In addition, the vehicle position information receiving unit 125 of the vehicle navigation guidance apparatus 120 receives an information signal for knowing the current position from the GPS satellite 135 to obtain the position information of the moving vehicle.

Induces driving of a moving vehicle by using traffic information, geographic information, and location information received from the GPS satellite 135 by the vehicle location information receiver 125 received by the search path receiving unit 122. do.

 The information received by the search path receiving unit 122 and the vehicle location information receiving unit 125 is transmitted to the path guide / departure determining unit 121 in the vehicle navigation induction device 120, and allows the moving vehicle to move forward. While determining the route to be moved, it is determined whether the moving route is frequently departed.

In addition, the route guidance / departure determination unit 121 periodically receives information from the route search unit 123 which detects a route in the vehicle itself, and the route search unit 123 itself includes road network or traffic map information. The information is obtained from the geographic information supply unit 124 which stores.

The geographic information supplier 124 applies the route search unit 123 to prevent the vehicle from leaving the route using the road network information and the traffic map information stored therein, and the route search unit 123 is The location information received by the vehicle location information receiver 125 is also transmitted to the path guide / departure determination unit 121, and compared with information applied from the search path receiver 122 and the vehicle location information receiver 125. To guide the vehicle in motion or to avoid leaving the route.

The vehicle location information receiver 125 extracts the location information of the current vehicle transmitted to the route search unit 123 from the travel information extractor 126 to guide the moving vehicle.

By the vehicle navigation guidance system as described above, the server receives the route information from the server and cannot reconstruct the information on the map mounted on the terminal, i.e., when a map change occurs, the server provides information on an adjacent intersection. Rescan the route search results and provide them in the form of compound intersections.

If the above information is not provided, the terminal cannot secure the reliability of the neighboring map and thus cannot extract the shape of the complex intersection from the shape of the neighboring intersection.

First, the adjacent intersections of interest are defined as follows.

The adjacent intersections are extracted intersections requiring guidance to the user on the basis of route guidance, and candidate intersections are extracted from the surrounding area before and after the route of the corresponding intersection, and the route guidance generated at the candidate intersection while driving along the route line is extracted and the same route When finding a guideable point, set it as the target of the compound intersection. However, if adjacent intersections are points within the same compound intersection, they are excluded from the target.

Meanwhile, according to the present invention, in extracting information for guiding a complex intersection, guidance may be induced to display an enlarged view in the same manner in the case of a map display.

This may be replaced by increasing display opportunities in addition to the general intersection intersection display method that is common in a map display based navigation device.

However, the TBT guide method using the screen configuration of information limited to the user may vary the display method according to a system supporting a resolution capable of displaying enlargement or a system supporting a schematic TBT guide.

In a system supporting the resolution capable of displaying the enlarged view, the surrounding area information is extracted, the intersection is displayed from the link shape, the route line and the vehicle driving state are displayed, and the map-based guide method is displayed.

In addition, in the system supporting the schematic TBT guidance, an icon for a case where the same guidance form of an adjacent intersection overlaps is added, and a road is added to the general TBT guidance screen.

In addition, the vehicle navigation guidance system according to the present invention is configured to perform a complex guide when the guidance occurs for the adjacent intersection when the route guidance.

For example, when there is an adjacent intersection on the route line before the route guidance point, the instruction is " A.

Or, if there is an adjacent intersection on the path line extension line after passing straight through the path guidance point, it is guided as "Refer to the path guidance screen in front of XXX m ...." (B).

Or, if the corresponding to the embodiment of the A, B, and "in reference to the path guide screen in front of the next XXX m after passing through the intersection of XXX m ..." will be guided.

By diversifying the guidance method as described above, the possibility of leaving the adjacent intersection when driving with only voice guidance without screen information is minimized.

Adjacent intersection information defined as mentioned above is classified as follows.

First, when a similar guide point exists within a threshold distance before passing the actual guide point when driving along the route line.

Second, assuming similar driving points exist within a critical distance after the actual guidance point, assuming straight driving along the route line.

Third, the first and second cases are the case.

As such, when there are a plurality of adjacent intersections within a critical distance, only one is selected as a representative neighboring intersection according to the classification.

Each of the representative adjacent intersections is evaluated by the ranks of road grades, similarities, and lane numbers. In the case of roads having the same specification, the nearest intersection having the highest confusion is the representative adjacent intersection.

5 is a flowchart illustrating a process of extracting adjacent intersection guidance information when reconstructing route guidance information according to the present invention.

First, the route to the destination is searched (S100), and the route is scanned from the starting link to the destination link (S110).

Subsequently, it is determined whether the current link is the actual guide point (S120). If the current link is the actual guide point, an intersection node within a threshold distance is extracted (S130).

In this case, the same candidate intersection as that of the guidance of the route guidance point is incorporated as a guidance target.

After extracting the intersection node within the threshold distance, it is determined whether the intersection node within the threshold distance exists on the path line to the destination (S140).

If present on the route line, the guide information for the access link of the intersection is extracted (S150), and if there is no intersection node within a critical distance on the route line, it is determined whether the guide line is in the direction opposite to the entry point of the entry route. (S145).

If the guide point is located in the opposite direction of the access road, the guide information for the access link of the corresponding intersection is extracted (S150), and if not exists in the opposite direction of the guide point access road ends.

After extracting the guide information for the access link of the corresponding intersection, it is determined whether the same guide exists (S160), and if present, the compound intersection display information is transplanted to the guide point (S170). That is, a compound intersection attribute is given to the guide target link.

As described above, since the neighboring intersection extraction process is guide information configured according to the search path, immediately after the path search (in the case of server transmission network information, determination is required at the server end, which is a step before the guide reconstruction performed by the terminal) and the path guide information. It is carried out during the reconstruction process.

The information reconstructed from the map and the reception information to deliver additional route guidance to the user with respect to the adjacent intersection extracted as described above is as follows.

First, there is a neighboring map information (node link network), in the case of a server transmission network to replace the information transmitted from the server, in the case of a low resolution to replace the shape with a simplified icon.

In addition, there is information before and after the adjacent intersection and distance information between the actual guide point and the adjacent intersection.

The guide for the adjacent intersection proposed by the present invention, after the reconstruction of the path guide information is completed, determines the information in real time during the path guide and delivers the information.

The extracted complex intersection information is transmitted according to the following guidance method when approaching the route guidance point.

First, the guidance point is approached including an adjacent intersection while driving the route. If an adjacent intersection is secondary to the guide point, the adjacent intersection is guided.

Subsequently, the guide is performed based on the actual guide point. Accordingly, the guide contents may be different according to the classification, so the reference distance should be unified to the actual guide point.

In addition, the extracted complex intersection information or a simplified icon screen is displayed.

In the case of voice guidance, the guidance is subdivided according to each case and the vehicle is guided to travel along the enlarged view with reference to the screen.

As described above, according to the path navigation guidance apparatus according to the present invention, the user is guided to the search path, such as a case where adjacent roads having a substantially similar shape exist on the path, or when the network is deformed from the actual shape when the map topology is constructed. In case of confusion, the user is provided with guidance information (magnification, icon, voice guidance, etc.) for an adjacent intersection.

6 is a flowchart illustrating a guide process for an adjacent intersection according to the present invention.

First, a route guide is performed (S200). At this time, voice guidance is also prepared.

The route guidance is transmitted in comparison with the vehicle position (S210).

Subsequently, it is determined whether a guide point including an adjacent intersection is approached (S220), and the neighbor intersection information is extracted and a guidance screen is prepared (S225).

In this case, when the guide point including the adjacent intersection is not approached, it is determined whether the screen display reference distance of the guide point passes (S230), and when the reference distance passes, the voice guidance is prepared according to the location of the adjacent intersection (S240). ).

Subsequently, the voice guidance is performed (S250), the enlarged view and the icon are extracted (S260), and the intersection screen of the adjacent intersection area is displayed (S270).

As described above, since the adjacent intersection guidance basically constitutes a screen according to the composite intersection display specification, adjacent intersections inside the composite intersection where duplication may occur on the screen display are excluded from the guidance target.

In this case, when guiding in the form of a simple intersection, only unnecessary guidance may be performed on a road without confusion, and if necessary, the following conditions may be added to reduce the complexity of the guiding.

First, if there is no room for confusion even when guiding in the form of an intersection road only because the road type difference between the guide point advancing road and the adjacent intersection-like shape is excessive, it may be excluded from the guide.

In addition, there is room for confusion in cases where the distinction is caused by the entry or avoidance of facilities, when the roads and highways are entered separately, and when there are adjacent intersections that are not recognized as crossroads and entrance roads. You can exclude it from the guide.

As described above, the vehicle navigation guidance apparatus according to the present invention provides the screen display and the voice guidance of the proximity point, and the separation of the adjacent branch point according to the deviation of the user's distance estimation failure or the convenience of the map configuration for the actual adjacent road shape. It is possible to minimize the user's path estimation failure due to.

As described above, the vehicle navigation guidance method for guiding a route according to the present invention provides guidance information to a user on a road which is likely to deviate when a user follows a route, such as an intersection or a junction that exists adjacent to each other. Therefore, there is an effect to facilitate the path following.

In addition, the present invention can respond to the complex intersection judgment criteria only in the configuration of the map without applying separately, so that a separate area on the map and reconstruct the information in order to configure the existing supernode (supernode) As it can be removed, it reduces the cost of mapping.

Claims (6)

If the destination information is received from the user, receiving search path information from the current location to the destination; Extracting an intersection node within a threshold distance by scanning each link from a current location to a destination using the search path information; Making a node existing on a route line before a destination at an intersection within the extracted threshold distance as an adjacent intersection; And extracting the guide information for the adjacent intersection. The method of claim 1, And the adjacent intersection is managed by assigning a compound intersection attribute. The method of claim 1, The method of extracting route guidance information according to claim 1, wherein the intersection node within the extracted critical distance is not designated as an adjacent intersection when the point is within the same compound intersection. The method of claim 1, Receiving destination information from the user, receiving search path information from a current location to a destination, And re-receiving search route information from the current location to the destination when the map is changed. The method of claim 1, The guidance information is a route guidance information extraction method, characterized in that the map enlargement or intersection rotation icon. Receiving destination information from a user; Extracting a route line by comparing the current position of the vehicle with the destination; Extracting adjacent intersections on the route lines; Preparing the adjacent intersection information and the guidance screen when the vehicle approaches the adjacent intersection; Providing voice guidance based on the location of the intersection adjacent to the vehicle; And, And extracting and displaying a map magnification or an intersection rotation icon for the adjacent intersection.

Images