JP5428973B2 - Route guidance device - Google Patents

Description

  The present invention is a route guidance device that is mounted on a vehicle and provides information to a crew member, where there is a traffic restriction section such as a road closure on a road around the destination, and there is no route other than the traffic restriction section. It is possible to provide route guidance to a place closest to the destination on a passable road.

  Conventionally, when a destination is input, the route guidance device corresponding to the traffic regulation information searches for a route from the current position of the vehicle to the inputted destination so as to detour if there is a traffic regulation section, The vehicle was guided to the destination. However, if the roads around the destination entered in the route guidance device are all traffic restricted sections such as closed roads, there is no route to the destination, so there is a problem that the vehicle cannot be guided to the destination. .

  Therefore, in order to solve this problem, there are methods specified in Patent Documents 1 to 3. In Patent Document 1, a parking lot near a destination is searched, the parking lot is set as a new destination, a route is searched, and route guidance is performed. In Patent Document 2, the route to the destination is searched and the guidance to the destination is ignored while ignoring traffic restrictions. In Patent Document 3, a route to the neighborhood of the destination is searched, and it is determined that the vehicle has arrived at the destination when it reaches the neighborhood of the destination. By these methods, even when the road around the destination designated in the route guidance device is a traffic regulation section such as a road closure, it is possible to provide route guidance to the neighborhood of the destination.

JP 2009-103623 A JP 2002-257570 A Japanese Patent Laid-Open No. 2005-241561

  However, in Patent Documents 1 and 3 described above, since the neighborhood of the destination is set as a new destination, there is a risk of route guidance to a place far from the original destination. Similarly, since Patent Document 2 searches for the shortest route to the destination, the traffic restriction on the road around the destination is not considered, and the traffic far from the destination in the traffic restriction section around the destination is not considered. There is a possibility that the route that passes through the end of the restricted section is searched and the route to the nearest destination is not guided. In particular, an emergency vehicle such as a fire truck needs to go to the destination, and at least to the place closest to the destination. However, with the above-described prior art, there is a possibility that route guidance cannot be made to the nearest location of the passable destination.

  Therefore, the present invention provides route guidance to a place closest to the destination when the destination input to the route guidance device has a traffic regulation section such as a road closure and there is no route other than the traffic regulation section. It is the purpose.

  In order to achieve the above object, a route guidance device according to the present invention is a route guidance device that is mounted on a vehicle and provides information to a crew member, and detects the current position of the vehicle and input means for inputting a destination. Based on the vehicle position detection means, map storage means for storing map data, traffic information storage means for storing information relating to traffic regulation, and the map data and the destination, the current position of the vehicle is used as a departure point. A route search processing means for searching for a route up to and a traffic regulation determining means for judging whether or not there is a traffic regulation section around the destination based on information relating to traffic regulation stored in the traffic information storage means And a control means for controlling each of the above means, and if there is a traffic regulation section on the road around the input destination and there is no route other than the traffic regulation section, Find the distance to the destination and both ends of the traffic restriction section around the place, set the road edge with the shorter distance to the destination as a new destination for route guidance, from the current position to the new destination By searching for a route, the crew is guided to a location closest to the destination.

  By using such a route guidance device, when there is a traffic regulation section such as a road closure around the destination and there is no route other than the traffic regulation section, the road in the traffic regulation section closest to the destination The route to the end is searched and guided. Therefore, according to the present invention, it is possible to guide the crew to a place closest to the destination that can pass to the destination. Especially when it is necessary to go as close to the destination as possible, such as emergency vehicles such as fire engines and ambulances, use the route guidance device of the present invention to perform emergency activities at the location closest to the destination. I can do it.

It is a block diagram of the route guidance apparatus of this invention. It is the figure in process 1 of the route guidance apparatus of this invention. It is the figure in process 2 of the route guidance apparatus of this invention. It is the figure of the process middle 3 of the route guidance apparatus of this invention.

  The present invention is a route guidance device, and when there is a traffic regulation section on a road around a destination inputted by a crew member and there is no route other than the traffic regulation section, both ends of the traffic regulation section around the destination Among them, a road end having a short distance to the destination is set as a new destination, and a route from the current position to the new destination is searched to guide the crew.

  Hereinafter, a route guidance apparatus according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a configuration diagram of a route guidance apparatus according to the present invention, which stores an input means for inputting a destination, a vehicle position detection means for detecting a vehicle position using a GPS or a gyroscope, and map data. Based on map storage means, traffic information storage means for storing information related to traffic regulation, route search processing means for searching for a route to the destination, and information related to traffic regulation stored in the traffic information storage means, A display for displaying a road map or the like, a traffic regulation judging means for judging whether or not there is a traffic regulation section on a road around the destination inputted from the input means and there is a route other than the traffic regulation section. And means for controlling each of the above means. Below, each part of the route guidance apparatus of this invention is demonstrated.

  The input means is composed of the input unit 1 and is used to input a destination to the route guidance device so that crew members on the vehicle such as a driver can guide the route to the destination they want to go to. is there. For example, by pressing a character displayed like a touch panel integrated with a liquid crystal display described later, the destination is input one by one.

  The vehicle position detection means is composed of a vehicle position detection unit 2, and can determine the current position (latitude and longitude) of the vehicle, the traveling direction of the vehicle, and the like by using a GPS, a gyroscope, a vehicle speed sensor, or the like. . Specifically, a GPS receiver is used to receive a signal from a GPS artificial satellite and determine the current position. The gyroscope is a sensor for detecting the traveling direction of the vehicle. Further, the vehicle speed sensor is for detecting the speed of the vehicle, and for example, converts the rotation of the transmission into an electric signal to detect the current speed of the vehicle. These three sensors are combined to obtain the current position of the vehicle.

  The map storage means is composed of the map storage unit 6 and stores map data including road data, node data, link data, and the like. Road data is road map information about roads and landmarks. Intersections, turning points, dead ends, etc. of each road are defined as nodes, roads between the nodes are defined as links, and the road map is created by connecting the links. It is composed. In addition, node data describes a node number with a unique number for each node where a plurality of roads intersect, merge and branch, node coordinates (latitude and longitude), and link numbers of all links connected to the node. It consists of data such as connection link numbers. On the other hand, link data includes a link number with a unique number for each road, link length, node coordinates (latitude and longitude) of start and end points, node numbers, road types such as expressways and general roads, road width, etc. It consists of each data. These data are updated to new data by manually replacing the data by the crew.

  The traffic information storage means is composed of the traffic information storage unit 5 and stores information related to traffic regulations that change in time and season, such as prohibition of right turn, prohibition of left turn, one-way traffic, traffic closure, or winter traffic closure. The stored information related to traffic regulation is updated to new data by manually replacing the data by the crew as with the map data.

  The route search processing means is configured by the route search processing unit 3 and searches for a route from the current position of the vehicle detected by the vehicle position detection unit 2 to the set destination. When searching for a route, in addition to the current position, the map data stored in the map storage unit 6, node data, link data, etc. are used to find the shortest route from the current position to the destination. Yes.

  The traffic regulation determining means is configured by the traffic regulation determining unit 4 and determines whether or not there is a route from the input unit 1 to the destination. The determination method is as follows. It is determined whether or not all the roads around the destination input from the input unit 1 are included in the information related to traffic regulation stored in the traffic information storage unit 5. If all the roads around the destination are included, it is determined that there is no route to the destination because all the roads around the destination are restricted traffic sections. If there is a road around the destination that is not included in the traffic regulation information, it is determined that there is a route to the destination.

  The display means includes a display unit 7 and is a display device for guiding and displaying map data and a route to the destination. For example, there is a liquid crystal display.

  The control means is composed of the control unit 8 and is a recording medium such as an HDD that records software for comprehensively controlling predetermined functions of the route guidance apparatus of the present invention, a CPU for processing the software, A processing device such as a microcomputer is provided to control each unit connected thereto.

  Next, the operation in the embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 2, 3, and 4, a case where there is only one road in contact with the destination input from the input unit 1 will be described below.

  As shown in FIG. 2, the crew member inputs the destination from the input unit 1 in order to set route guidance to the destination that the crew member wants to go to. The control unit 8 acquires information about the input destination from the input unit 1, and the traffic regulation determination unit 4 acquires information about the destination from the control unit 8. The traffic regulation determination unit 4 determines whether or not a route from the current vehicle position to the destination exists from the acquired information about the destination. The determination procedure is as follows.

  First, a road around the destination is detected. For this purpose, the route search processing unit 3 acquires information about the destination from the control unit 8, and the latitude and longitude of the destination acquired from the map data stored in the map storage unit 6 and the map data around the destination Is acquired via the control unit 8. The link number of the road around the destination and the node numbers at both ends of the road are detected from the latitude and longitude of the destination and the map data. Then, the route search processing unit 3 outputs the node numbers at both ends of the road around the destination to the traffic regulation determining unit 4. In this embodiment, as shown in FIG. 3, there is only one road around the destination, and the node numbers at both ends of the road are (24252) and (24255).

  Next, the traffic regulation determination unit 4 confirms whether or not all of the acquired roads between the two nodes, that is, the roads around the destination are traffic regulation sections, and whether or not there is a route to the destination. Determine whether. Therefore, information relating to road traffic restrictions associated with the two node numbers is read from the traffic information storage unit 5 via the control unit 8. The read information is searched for whether there are node numbers at both ends of the road around the destination detected above. If there is a node number, it is determined that the road around the destination is a restricted traffic section and there is no route to the destination. If there is no node number, it is determined that the road around the destination is not a restricted traffic section and there is a route to the destination. In the present embodiment, although not shown in the figure, the information on traffic regulation stored in the traffic information storage unit 5 includes the detected two node numbers (24252) and (24255). The surrounding road is a traffic regulation section, and the traffic regulation judgment unit 4 judges that there is no route to the destination.

  In this embodiment, since the traffic regulation determining unit 4 determines that there is no route to the destination, information indicating that there is no route to the destination is sent to the route search processing unit 3 via the control unit 8. Output. As shown in FIG. 3, the route search processing unit 3 that has received the above information calculates a route distance to the detected two nodes and the destination. As a route distance calculation method, the route distance is obtained along the road on the map data using the map data. Two route distances obtained by this method are compared, and a node having a short route distance is set as a new destination. In this embodiment, as shown in FIG. 3, the node with the node number (24252) has a shorter route distance to the destination. Therefore, the route search processing unit 3 sets the node number (24252) as a new destination.

  After the destination is set, the route search processing unit 3 searches for a route to the node of the node number (24252) which is the newly set destination as shown in FIG. In order to search for a route, the route search processing unit 3 acquires information on the current vehicle position from the vehicle position detection unit 2 and map data from the map storage unit 6 via the control unit 8, and calculates the current vehicle position from the current vehicle position. The shortest route to the newly set node (24252) is searched.

  The shortest route obtained by searching is output to the display unit 7 via the control unit 8, and the display unit 7 displays the shortest route to the destination and a map of the current position of the vehicle to guide the crew. Can start.

  In this embodiment, the map data stored in the map storage unit 6 and the traffic regulation information stored in the traffic information storage unit 5 are updated manually by the crew, but not shown in the figure Information may be downloaded from a server or the like via the network and automatically updated, and the present invention is not limited to these.

  In addition, as a method of obtaining the distance between the destination and the nodes at both ends of the restricted traffic section, in this embodiment, the route distance between the destination and the node is obtained using map data. And longitude) and the coordinates of the destination (latitude and longitude) may be used to determine the straight line distance between the destination and the node, and the present invention is not limited to these.

  In this embodiment, the case where there is only one road around the destination as shown in FIGS. 2, 3, and 4 is explained. However, when there are a plurality of roads around the destination, the road around the destination is shown. It is confirmed whether all are traffic-restricted sections, and it is determined whether there is a route to the destination. If it is determined that all roads around the destination are restricted traffic sections and there is no route to the destination, the road edge with the shortest distance to the destination is set as the new destination in the restricted traffic section. Set and search for the shortest route from the current position of the vehicle to the newly set destination. If it is determined that there is a road that is not a traffic restriction section among the roads around the destination and it is determined that there is a route to the destination, the route through the road that is not the traffic restriction section is searched for route guidance.

  In this embodiment, the case where the road around the destination is a restricted traffic section has been described. However, when there is no restricted traffic section on the road around the destination, the route search processing unit 3 is input from the input unit 1 as usual. The shortest route to the destination is searched, and the display unit 7 displays the shortest route and a map of the current position of the vehicle to provide route guidance.

  As described above, the present invention allows the destination to pass even if there is a traffic restriction section such as a road closure on all the roads around the destination input to the route guidance device and there is no route other than the traffic restriction section. You can get directions to the nearest location.

DESCRIPTION OF SYMBOLS 1 Input part 2 Vehicle position detection part 3 Route search process part 4 Traffic regulation judgment part 5 Traffic information memory | storage part 6 Map memory | storage part 7 Display part 8 Control part

Claims (1)

A route guidance device mounted on a vehicle and providing information to a crew member,
An input means for inputting a destination;
Vehicle position detection means for detecting the current position of the vehicle;
Map storage means for storing map data;
Traffic information storage means for storing information relating to traffic regulation;
Based on the map data and the destination, route search processing means for searching for a route to the destination with the current position of the vehicle as a departure point;
Based on information on traffic regulation stored in the traffic information storage means, traffic regulation judgment means for judging whether a traffic regulation section exists around the destination; and
Control means for controlling each of the above means,
When the traffic regulation judging means judges that there is a traffic regulation section around the destination and that there is no route other than the traffic regulation section,
The route search processing means obtains and compares the distance to the destination from both ends of the road in the restricted traffic section around the destination, and sets the road end with the shorter distance as a new destination. A route guidance device for searching a route from a current position of a vehicle to a newly set destination.

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