JP5486352B2 - Route guidance device - Google Patents

Description

  The present invention relates to a route guidance device for guiding a set tour route.

Recent navigation apparatuses have a function of calculating a route from the current location to the destination, and a function of displaying the calculated route on a display screen in a superimposed manner.
Such navigation devices are also used for road maintenance to investigate road signs and regulations.

  In field surveys for road improvement, it is necessary to pass through all the roads that are the subject of the survey as efficiently as possible. Ideally, it is desirable to complete the field survey with only one trip on each road under investigation. However, since actual roads have complicated connection relationships, it is almost impossible to travel all routes once and travel all routes. For this reason, it is inevitable that the route used for the field survey will be a patrol route that travels multiple times on the same road.

  When the travel route is a patrol route, a point (overlapping route point) on the route on which the vehicle travels a plurality of times occurs. The vehicle must take a different direction of travel depending on the number of passes, such as turning right after passing the point for the first time and going straight after passing the second time.

  Various methods for displaying such routes in an easy-to-understand manner have been developed. For example, Patent Document 1 includes a route determination unit that compares route data with a current position to identify a route portion that should proceed ahead of the current position, and displays such that the identified route portion can be distinguished on the route. How to do is described. Further, Patent Document 2 describes a method of displaying a plurality of routes when two or more routes are overlapped through the same road section and displayed by shifting the route of the overlapping portion. ing.

JP 2001-194175 A JP 2006-113460 A

  However, according to the methods described in Patent Document 1 and Patent Document 2, it is difficult to grasp a travel route on a complicated patrol route that travels the same road multiple times even though the current position and the direction of the route to be traveled can be distinguished. There's a problem.

  An object of this invention is to provide the route guidance apparatus and route guidance method which can solve said subject.

  In order to solve the above problems, the present invention provides a route guidance device for guiding a set route, a route data storage unit that stores route data related to the route, a map information storage unit that stores map information, Position detecting means for detecting a position; and display control means for displaying a continuous route line from a starting point to a destination based on the route data superimposed on a map, the display control means further comprising the route A function for displaying a plurality of route lines displayed in correspondence with the section when the same section that passes a plurality of times is set in a different width from the reference line serving as a reference. And a function of changing the shift width of the route line corresponding to the route that has passed when the passage of the section is recognized.

  Note that the above-described features do not enumerate all the features of the present invention, and a configuration (or method) including these as main parts can also be an invention.

  According to the present invention, when a route for traveling the same section a plurality of times is set, the plurality of route lines displayed in the same section are displayed while being shifted from the reference line. Furthermore, since the shift width of the route line corresponding to the section that has passed is changed and displayed, the traveling route can be easily understood even in a complicated traveling route, and the entire route order can be grasped.

Route guidance device block diagram. The figure which shows an example of the shift width calculation of a route line. The figure which shows an example of the shift display of a route line. The flowchart of route guidance processing. The figure explaining a guidance route. The figure which shows the guide route after shifting width calculation. The figure which shows the guide route after shifting width recalculation. The figure which shows the guide route after shifting width recalculation. The figure which shows an example of the display method of the left-right turn path | route. The figure which shows an example of the display method of the left-right turn path | route.

Hereinafter, embodiments embodying the present invention will be described.
As shown in FIG. 1, the route guidance device 1 in this embodiment includes a route data storage unit 2, a map information storage unit 3, a position detection unit 4, a display control unit 5, and a reading unit 6. Yes.
The route data storage unit 2 stores route data related to a patrol route that patrols all roads to be surveyed in an area targeted for road maintenance.

The map information storage unit 3 stores map information including road data. The road data is composed of links and nodes.
A link represents a road. A link includes a unique ID number that identifies the link, a link length that indicates the link length, node information that exists at the start and end of the link, position coordinates of multiple points on the link, route names, route types, and traffic Various attribute information such as cost is associated.

A node represents an intersection or the like existing at an end point of a link. The attribute information is also associated with the node. The node attribute information includes a unique ID number that identifies the node, a position coordinate, a node name, a connection link ID in which a link ID of a link connected to the node is described, and the like.
As the position coordinates, which are link and node attribute information, latitude and longitude can be used, or orthogonal coordinates X and Y with the origin O at the lower left of the map can be used.

The position detection unit 4 includes, for example, a gyro that detects a traveling direction of a moving body, a vehicle speed sensor that detects a vehicle speed, a GPS sensor that detects a GPS signal from a GPS satellite, and the like.
The GPS measures the current position of the route guidance device 1. Specifically, the current position (latitude and longitude) of the route guidance device 1 is measured based on radio signals transmitted from a plurality of GPS satellites received by a GPS antenna (not shown) provided in the route guidance device 1. In addition to this, the current position may be determined by a method using DGPS (differential GPS), a method using radio waves of a radio base station of the route guidance device 1, a method using or using a gyro sensor, or the like. Good.

  When there is an identical section that passes a plurality of times in the route, the display control unit 5 displays a plurality of route lines that are displayed corresponding to the section. At this time, the plurality of route lines are displayed by changing the shift width from the reference line as a reference. The reference line may be a line along the route. In this embodiment, a road link corresponding to a road in each section is used as a reference line, and the shift distance from the road link is set to the passing route line when the vehicle on the route first passes after the present. An example of setting a smaller value will be described. As the reference line, a road polygon for expressing a road on the route may be adopted.

  The shift width of the route line set by the display control unit 5 can be obtained by, for example, a calculation formula as shown in FIG. In FIG. 2, when the road link coordinates are (x, y) and the angle between the direction passing through the road link and the horizontal line H is θ, the route line is a line Rn extending from (xn, yn) to the traveling direction. Become. In FIG. 2, L can be set to an arbitrary value, and n is an integer based on the order of passage of routes on each road link. At this time, n counts the number of passes separately for each direction passing the road link.

  The reading unit 6 reads route data of a cyclic route in a predetermined area searched by an external device. Examples of the method for reading the route data include reading from a storage medium and reception by communication.

Next, a method for displaying a route line displayed by the display control unit 5 will be described.
FIG. 3 is an example of shifting the route line when the road link La passes through the node Na from the node Nb twice and from the node Nb to the node Na three times.
Since the value of n in each route line (hereinafter referred to as “n value”) in this example counts the number of times of passage separately for each direction of passage of the road link, the n value of route lines Ra and Rc is 1. The n value of the lines Rb and Rd is 2, and the n value of the route line Re is 3, which are calculated using the calculation formula of FIG. As a result of the calculation, as shown in FIG. 3, the shift width of the route lines Ra to Re is set from the side closer to the link La in the order of Ra and Rb, and the route passing through the link La from Na to the node Nb. The route passing from the node Na to the node Na is set from the side closer to the link La in the order of Rc, Rd, and Re. In this way, the line segment is shifted by the shift width determined for each link of the entire route. Each shifted line segment is displayed as a single route line by connecting it smoothly from the start point side.

  Further, when the display control unit 5 recognizes that the moving body has passed the link, the display control unit 5 performs re-display by changing the shift width of the route line corresponding to the passed link. The shift width can be changed by, for example, a method in which the n value of the route line corresponding to the route that has passed is set to the maximum value, and the n value of other route lines passing in the same direction is decreased by one. By doing so, the passage route when the vehicle on the route first passes after the present time is displayed at the position closest to the road that always passes.

Next, the flow of processing using the route guidance device 1 of the present invention will be described. FIG. 4 is a flowchart showing the overall operation of the route guidance apparatus 1 shown in FIG. 1 in the present embodiment.
First, route data specifying a route traveling on a road corresponding to the network shown in FIG. 5 of the moving object is read from an external storage medium to the reading unit 6 and stored in the route data storage unit 2 (step S1). .

  The display control unit 5 reads the route data from the route data storage unit 2 and calculates the shift width of the route line of this route data (step S2). Specifically, as shown in FIG. 6, the display control unit 5 relates to a route that travels in the order of the start point S, nodes N5, N2, N3, N6, N5, N2, N1, N4, N5, N2, and the end point G. When the information is read from the route data storage unit 2, the shift width is calculated by the calculation formula shown in FIG. Then, a route line reflecting the result of the calculation is set. For example, paying attention to the link L4, the total number of passages of the link L4 from N5 to N2 is 3, so the maximum value of n is 3. Further, since routes R1, R2, and R3 pass in this order, n = 1 for R1, n = 2 for R2, and n = 3 for R3 in the calculation formula of FIG. Calculate the shift width. As a result, the route lines R1 to R3 are set from the side closer to the link L4 in the order of R1, R2, and R3 as shown in FIG.

  After the route line is set by the display control unit 5, when the moving body M starts traveling from the starting point S, the route guidance device 1 calculates the current position of the moving body M based on the information of the position detection unit 4, The current position on the map is specified using the map information read from the map information storage unit 3 (step S3).

  Next, the display control unit 5 determines which position on the route the moving body M travels from the route data read from the route data storage unit 2 and the position of the moving body M. And the display control part 5 determines the total frequency | count of the passage of the same direction of the passed link, whenever the mobile body M passes one link (step S4). When the total number of passages in the same direction of the link determined in step S4 is larger than 1, the display control unit 5 recalculates the shift width of the route line passing through the passed link (step S5).

  For example, when it is determined that the moving body M that has departed from the starting point S traveled the route from the node N5 to the node N2 and passed through the link L4, the display control unit 5 moves from the node N5 of the link L4 to the node N2. Determine the total number of passes. Since the total number of times that the link L4 passes from the node N5 to the node N2 is three, which is larger than 1, the display control unit 5 re-displays the display shift width of the route lines R1 to R3 that pass through the link L4. calculate. In the recalculation of the shift width of the route lines R1 to R3, the n value of the route line R1 corresponding to the route passed as described above is set to the maximum value 3, and the n values of the other route lines R2 and R3 are decreased by one. Is done by. As shown in FIG. 7, the recalculated route line is set so that the route passing through the link L4 is in the order of R2, R3, and R1 from the side closer to the link L4.

  After the route line corresponding to the passed link L4 is recalculated, it is determined whether or not the moving object M has reached the destination G (step S6). The current position of the moving body M is calculated again from the information (step S3), and the total number of times the link has passed is determined (step S4). The display control unit 5 determines the total number of passages when passing through the links L2, L5, and L7, respectively, but since the total number of passages of the links L2, L5, and L7 is one, the route line shift width is recalculated. Without proceeding to (Step S5), the current position of the moving body M is specified again (Step S3).

  Next, when it is determined that the mobile unit M travels along the route of the node N6 → node N5 → node N2 and passes through the link L4, the display control unit 5 determines the total number of passages of the link L4 and passes the link L4. The display shift width of the route lines R1 to R3 to be calculated is calculated again. The recalculation of the display shift width of the route lines R1 to R3 is performed by setting the n value of the route line R2 corresponding to the route passed as described above to the maximum value 3, and decreasing the n values of the other route lines R3 and R1 by one. Is done by doing. As shown in FIG. 8, the recalculated route line is set and displayed from the side closer to the link L4 in the order of R3, R1, and R2 as the route passing through the link L4.

  Thus, in the route guidance device 1 of the present invention, the entire route is displayed, and even when traveling the same route a plurality of times, the currently traveling route is displayed in a state closest to the reference line. Therefore, the driver can know which route he is traveling by confirming the route line displayed at the position closest to the reference line at all times. Therefore, the driver traveling on the patrol route can clearly know the direction to proceed from this display.

(Modification)
The display control unit 5 can also perform the following control of the route to be displayed.
When turning right and left, the corners of the route line are rounded and displayed, so that even when a plurality of route lines overlap, the relationship between the approach route and the exit route can be easily determined. For example, in the case of the display form shown in FIG. 9A, it is difficult to determine whether the route line R10 and the route line R11 are entered from the route line R12 or the route line R13. Therefore, as shown in FIG. 9B, when turning right and left, the corners of the route line are rounded and displayed so as not to intersect with other routes. Therefore, the route line R12 → the route line R10 and the route It becomes easy to determine that the vehicle travels from line R13 to route line R11.

  In addition, when making a right turn on a T-junction, by reducing the shift width of the route at the time of the right turn, it becomes easier to determine the relationship between the approach route and the exit route even when a plurality of route lines overlap. For example, in the case of the display form shown in FIG. 10A, it is difficult to determine which route line the route line R15 is entering from. Therefore, as shown in FIG. 10 (b), the relationship between the approach route and the exit route is determined by displaying the shift width of the route line R15 to the right of the route line R15 on the route line R15 with a small shift width. It becomes easy to do.

  In the present embodiment, it is possible to display the route to be followed in a more easy-to-understand manner, for example, by displaying a route portion ahead of the current position by a certain distance in a color different from the color of the entire route. In addition, it is possible to change the line type, such as changing the line type, the line thickness, or displaying only the route part ahead of a certain distance, instead of the color, such that one is a solid line and the other is a dotted line. .

  The route guidance device 1 can also be used when delivering a package by an automobile or the like such as delivery by truck. Furthermore, it can also be used for efficiently traveling around a plurality of places such as sales sales around customers by customers, public relations activities while moving by car, election activities, nursing care services.

1 ... Route guidance device,
2 ... route data storage unit,
3 ... Map information storage unit,
4 ... position detector,
5 ... display control unit,
6: Reading section.

Claims (3)

In the route guidance device for guiding the set route,
Route data storage means for storing route data relating to the route;
Map information storage means for storing map information;
Position detection means for detecting the current position;
Display control means for displaying a continuous route line from the departure point to the destination based on the route data superimposed on a map, and the display control means further comprises:
When there is the same section that passes multiple times in the route, a plurality of route lines displayed corresponding to the section are displayed with the shift width from the reference line as a reference being set differently. Function and
A route guidance device having a function of changing the shift width of a route line corresponding to a route that has passed when the passage of the section is recognized.   2. The route guidance device according to claim 1, wherein the display control unit sets a shift width from the reference line to be smaller for a route line corresponding to a route that first passes in the section.   The route guidance device according to claim 1 or 2, wherein the reference line is a line corresponding to a road in the section.