JP2009168547A - Navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device capable of detecting and reporting traveling in a wrong way, when a vehicle is traveling along a highway. <P>SOLUTION: This navigation device 1 is equipped with: a vehicle speed detection means 19 for detecting the vehicle speed; a discrimination information storage means 15 for storing the vehicle speed detected by the vehicle speed detection means 19, in order to discriminate wrong-way traveling of the vehicle; and a wrong-way traveling discrimination means 14. When the vehicle is traveling in a highway section, the vehicle speed detection means 19 detects the vehicle speed at prescribed time intervals, and stores the vehicle speed in the discrimination information storage means 15; and when the vehicle speed is detected as having decelerated below a prescribed speed, with reference to discrimination information stored in the discrimination information storage means 15, the wrong-way traveling discrimination means 14 discriminates wrong traveling of the vehicle from a vehicle direction, before and after deceleration; and when is discriminated that the vehicle is traveling in a wrong-way direction, this is reported. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention specifies a current position, displays the current position on a map or a guide route, and notifies a user, and in particular, displays a current position measured by a positioning means that is used in a vehicle and is displayed by matching processing. The present invention relates to a navigation device, and relates to a navigation device that detects and reports reverse running of a vehicle on the basis of information on the speed and traveling direction of a vehicle traveling on a highway.

  Conventionally, when driving on a road such as a car, the current position is obtained until reaching the destination, and the current position is displayed on the display screen together with the road map, so that the user can reach the destination without getting lost. A vehicle-mounted navigation device is known.

  A GPS (Global Positioning System) navigation system using an artificial satellite is known for measuring the current position. This is to identify the current position by receiving radio waves from a plurality of artificial satellites orbiting the earth and performing arithmetic processing on the received data.

  The current position specified by the GPS is compared with the map data stored in the map storage means or the like of the navigation device. For example, a matching process is performed on the road closest to the current position, and this position is used as the current position subjected to the matching process. Displayed on the display screen. Thereby, even when there is a slight error in GPS positioning, it is possible to correct the current location on the road and display without a sense of incongruity.

  In addition, as a navigation device, a route search from the departure point specified by the user to the destination is performed, the guide route is displayed on the display screen, and the current position measured is compared with this guide route and the matching process is performed. There is also.

  Various matching processing techniques have been proposed. For example, the following Patent Document 1 (Japanese Patent Laid-Open No. 9-68437) discloses an invention of a navigation device that specifies a correction position with a cursor. The navigation device disclosed in Patent Document 1 can prevent a significant error that occurs when a user sets a position of a vehicle or corrects a measured position.

  This navigation device has a current position correction mode, and when the current position correction mode is set, the error range obtained from the GPS receiver is displayed on the map data, and the user operates the input device to move the cursor. , Correct the position of the vehicle. At this time, the control unit is configured to control so that the correction is permitted if the coordinates indicated by the cursor are within the error range, and the correction is not permitted if the coordinates are outside the error range.

  By the way, when a vehicle travels on an expressway, the upstream road (upward road link) and the downstream road (downward road link) are clearly separated and do not run backward. However, there may be a situation where the vehicle runs backward due to an error such as a mistake in the vertical direction at the interchange.

  Thus, when the vehicle travels in a direction that is not intended to travel, there is a concern that it may lead to a serious accident. Therefore, there is a demand for a system that can detect and notify the reverse running of a vehicle on an expressway or the like. For example, the following Patent Document 2 (Japanese Patent Laid-Open No. 2007-102443) and Patent Document 3 (Japanese Patent Laid-Open No. 2007-293390) disclose a reverse running warning system and a reverse running warning device that warn about reverse running of a vehicle. Is disclosed.

  The invention of the reverse running warning system disclosed in Patent Document 1 is that roadside devices provided for each interchange on a highway each transmit entrance information wirelessly, and the vehicle-mounted device uses the entrance information as a predetermined time. If it is received continuously for about 5 seconds, a sound warning about reverse running will be generated continuously for about 30 seconds. The on-vehicle device will judge the approach to the interchange by continuously receiving the entrance information and warn about reverse running by voice. It is comprised so that it may do.

In the invention of the reverse running alarm device disclosed in Patent Document 2, the system controller controls the in-vehicle camera to execute imaging, sequentially acquires image data, and refers to the reference image data for road signs. Is recognized, and it is determined whether the road sign is on the right side of the traveling lane. If it is determined that the road sign is on the left side of the travel lane, the system controller determines that the vehicle is traveling forward on the highway. Further, when it is determined that the road sign is on the right side of the driving lane, the system controller is configured to control the vibration generator to vibrate and warn the driver of the reverse running. .
JP-A-9-68437 (FIG. 1, paragraphs [0030] to [0032]) JP 2007-102443 A (FIGS. 1 and 3) JP 2007-293390 A (FIGS. 2 and 3)

  However, in the invention of the reverse running warning system disclosed in Patent Document 2, a roadside device is provided for each expressway interchange, and the vehicle is provided with a vehicle-mounted device that receives signals from the system. There is a problem that both the road equipment and the vehicle equipment are required, because the entrance information is always transmitted wirelessly, and the in-vehicle device needs to judge the approach to the interchange by continuously receiving the entrance information and perform a reverse running warning. there were.

  Moreover, in the invention of the reverse running alarm device disclosed in Patent Document 3, there is a problem that it is necessary to install a reverse running alarm device having a camera function in the vehicle.

  As a result of various studies to solve the above problems, the inventor of the present application is able to provide a reverse-running detection function in a navigation device that displays a current position measured by positioning means that is used in-vehicle and matched by a positioning means. Pay attention and determine that the vehicle is running backward when the traveling direction before and after deceleration is reversed based on the speed and traveling direction information of the vehicle running on the highway. If this is not the case, the present invention has been completed by conceiving that the above problems can be solved.

  That is, the present invention has an object to solve the above-mentioned problems, and detects and reports reverse running on a highway using a vehicle-mounted navigation device without providing special equipment. An object of the present invention is to provide a navigation device that can perform the above-described operation.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is
Based on the current position detecting means for detecting the current position, the map storing means for storing the map information, the map information stored in the map storing means and the current position detected by the current position detecting means. In a navigation device comprising matching control means for detecting a matching road type while matching on a road of map information,
The navigation device includes reverse running determination means for determining reverse running,
When it is detected by the matching control means that the current position is matched with the expressway section, if reverse running is determined by the reverse running determination means, the fact is notified.

The invention according to claim 2 of the present application is the navigation device according to claim 1, wherein the navigation device stores speed detection means for detecting a movement speed, and discrimination information for storing the movement speed detected by the speed detection means. Storage means,
The reverse running detecting means detects the moving speed at a predetermined time interval, stores the moving speed in the discrimination information storage means, and refers to the discrimination information stored in the discrimination information storage means. When it is detected that the moving speed is decelerated below a predetermined speed, reverse running is determined based on the traveling direction before and after the deceleration.

The invention according to claim 3 of the present application is the navigation device according to claim 1, wherein the navigation device includes speed detection means for detecting a movement speed, and discrimination information for storing the movement speed detected by the speed detection means. Storage means,
The reverse running detecting means detects the moving speed at a predetermined time interval, stores the moving speed in the discrimination information storage means, and refers to the discrimination information stored in the discrimination information storage means. When it is detected that the moving speed is decelerated below a predetermined speed, the direction of the road link currently matched by the matching control means and the direction of the road link matched by the matching control means before the deceleration are determined. In comparison, when the direction of both road links is opposite, it is determined that the vehicle is running backward.

According to a fourth aspect of the present invention, in the navigation device according to the first aspect, the navigation device includes speed detection means for detecting a movement speed, and discrimination information for storing the movement speed detected by the speed detection means. A storage means and a traveling direction detection means for detecting the traveling direction;
The reverse running detection means detects the traveling direction by the traveling direction detection means, stores the traveling direction in the discrimination information storage means, and refers to the discrimination information stored in the discrimination information storage means to determine a vehicle speed. When it is detected that the vehicle is decelerated below the speed, the traveling direction before deceleration is compared with the current traveling direction, and when the traveling direction is reverse, it is determined that the vehicle travels backward.

  In the invention according to claim 1, the navigation device includes reverse running discrimination means for discriminating reverse running, and the reverse running is performed when it is detected by the matching control means that the current position is matched with the highway section. When reverse running is discriminated by the discriminating means, the fact is notified.

  According to such a configuration, when reverse running is determined while traveling on a highway, it can be notified and warned to that effect.

  According to a second aspect of the present invention, the navigation device according to the first aspect comprises a speed detection means for detecting a movement speed, and a discrimination information storage means for storing the movement speed detected by the speed detection means, The reverse running detection means detects the moving speed at a predetermined time interval, stores the moving speed in the discrimination information storage means, and refers to the discrimination information stored in the discrimination information storage means. When it is detected that the moving speed is decelerated below a predetermined speed, reverse running is determined based on the traveling direction before and after the deceleration.

  According to such a configuration, when the speed of the vehicle is reduced to a predetermined speed or less and the direction of the current vehicle is opposite to that before the deceleration, the vehicle makes a U-turn and enters a reverse running state due to factors such as errors. It can be determined that there is, and if reverse running is determined, that fact can be notified and warned.

  According to a third aspect of the present invention, in the navigation device according to the first aspect of the present invention, the navigation device includes a speed detection unit that detects a movement speed, and a discrimination information storage unit that stores the movement speed detected by the speed detection unit, The reverse running detection means detects the moving speed at a predetermined time interval, stores the moving speed in the discrimination information storage means, and refers to the discrimination information stored in the discrimination information storage means. When it is detected that the moving speed is decelerated below a predetermined speed, the direction of the road link currently matched by the matching control means is compared with the direction of the road link matched by the matching control means before the deceleration. Then, when the directions of both road links are opposite, it is determined that the vehicle is running backward.

  According to such a configuration, when the vehicle is decelerated, it is determined whether or not the direction of the vehicle is reverse by comparing the traveling direction of the road link that has been matched based on the current position information before and after that. Thus, the reverse running state of the vehicle can be identified, and when reverse running is determined, the fact can be notified and warned.

  In the invention according to claim 4, in the navigation device according to claim 1, speed detecting means for detecting the moving speed, discrimination information storing means for storing the moving speed detected by the speed detecting means, and a traveling direction are detected. A traveling direction detection unit, wherein the traveling direction detection unit detects the traveling direction, stores the traveling direction in the determination information storage unit, and stores the determination information stored in the determination information storage unit; When it is detected that the vehicle speed is decelerated to a predetermined speed or less with reference, the traveling direction before deceleration is compared with the current traveling direction, and when the traveling direction is reverse, it is determined that the vehicle is traveling backward.

  According to this configuration, when the vehicle is decelerated, it is possible to determine whether the vehicle is in the reverse direction by comparing the traveling direction of the vehicle before and after the vehicle, and to identify the reverse running state of the vehicle, When reverse running is determined, it can be notified and warned to that effect.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiments shown below exemplify a navigation device for embodying the technical idea of the present invention, and are not intended to specify the present invention for this navigation device. The present invention is equally applicable to navigation devices of other embodiments included in the scope.

  FIG. 1 is a block diagram showing a configuration of a vehicle-mounted navigation device provided with photographing means according to an embodiment of the present invention. The navigation device 1 may be a communication-type navigation device that uses a portable electronic device such as a mobile phone provided with imaging means such as a camera as a terminal device, and is placed on a dashboard of a vehicle such as an automobile. Therefore, it may be a navigation device with a camera used for in-vehicle use, or may be of a type that can be removed from the vehicle and carried by the user. In the following description, these are collectively referred to as the navigation device 1.

  The navigation device 1 includes a control means 10, a current position detection means 11, a map storage means 12, a route search means 13, a reverse running discrimination means 14, a discrimination information storage means 15, an input means 16, a display means 17, a matching processing means 18, The vehicle speed detection means 19 and the traveling direction detection means 20 are provided.

  The control means 10 is constituted by a processor including a CPU, a RAM, and a ROM, and controls the operation of each unit of the navigation device 1 according to a control program recorded in the RAM and ROM. The current position detection means 11 is composed of, for example, a GPS receiver and receives radio waves including time information from a plurality of GPS satellites orbiting the earth and calculates current position information based on the received radio waves. It is.

  Further, the current position detecting means 11 may be used in combination with a self-contained navigation means comprising an angle control sensor, an acceleration sensor, a distance sensor, a direction sensor, and the like. In this case, the travel distance and travel direction of the vehicle are detected, and the current position is obtained by adding these values to the reference position. This current position detection method, when combined with GPS reception, is effective in tunnels where GPS radio waves cannot be received or in high-rise buildings where errors are likely to occur.

  The map storage means 12 stores road node data including road node data and road link data in which nodes such as intersections and branch points of roads are nodes and links between the nodes are links. The road node data includes road node numbers, position coordinates, the number of connection links, intersection names, and the like. The road link data includes the number of road nodes as starting and ending points, road type, link length (link cost), required time, number of lanes, road width, and the like. Further, data such as bridges, tunnels, railroad crossings, and toll gates are added to the road link data as link attributes. The road type is information including a distinction between an expressway and a toll road and a distinction such as a national road or a prefectural road.

  The road data includes the location information of a specific area such as a parking area and a service area provided on each expressway in the expressway, the entry path to the specific area, and the exit path from the specific area for each specific area. Contains information. The road data includes attribute information such as road types such as highways, national roads, prefectural roads, municipal roads, road widths, and the number of lanes, and is stored as map data according to the traveling direction of up and down.

  The vehicle speed detection means 19 detects the speed of the vehicle using the above-described current position detection means 11 or self-contained navigation means. In this embodiment, it is determined whether or not the vehicle is decelerated to a predetermined speed or less during traveling on the highway in order to determine reverse running while traveling on the highway. The same applies to the traveling direction detection means 20, which detects the traveling direction of the vehicle and whether the traveling direction has changed in the opposite direction to the previous traveling direction after the vehicle speed has been reduced to a predetermined speed or less during highway traveling. Detect whether or not.

  Information on the traveling speed of the vehicle detected by the vehicle speed detecting means 19 and information on the traveling direction of the vehicle detected by the traveling direction detecting means 20 are recorded in the discrimination information storage means 15 as discrimination information for discriminating reverse running of the vehicle. Temporarily stored as information. The reverse running determination unit 14 determines whether or not the vehicle is in the reverse running state using the vehicle speed and the history information of the traveling direction stored in the determination information storage unit 15 as the determination information.

  Normally, as long as the vehicle is traveling normally while the vehicle is traveling on a highway, its traveling direction is not reversed. If there is an operation to decelerate the vehicle below a predetermined speed and the vehicle travels in the opposite direction before and after the operation, the vehicle makes a U-turn on the same lane (up road link or down road link). There is a concern that it was in a reverse running state. In the navigation apparatus 1 according to the first embodiment, such a situation is determined as reverse running using the vehicle speed and the history of the traveling direction as the discrimination information.

  When the reverse running determination unit 14 determines the situation as described above and determines that the vehicle is running backward, the display unit 17 is notified accordingly. In addition to using the display means 17, the notification means may be a method such as voice notification or lighting of a warning lamp.

  The map storage means 12 further stores background data including facility data including water system data such as coastline, lake and river shape, administrative boundary data, facility location, shape, and name.

  In addition to the road data and background data, the map storage means 12 may include map image data stored in a vector format in order to display the map image in an easily viewable manner.

  When the navigation device 1 is used, the road data, background data, and map image data are extracted from the map storage means 12 in a predetermined range including the current position of the navigation device 1, and a current position mark indicating the current position. And the guide route image are superimposed and displayed on the display means 17.

  When the navigation device 1 is used, the road data, background data, and map image data are extracted from the map storage means 12 in a predetermined range including the current position of the navigation device 1, and a current position mark indicating the current position. And the guide route image are superimposed and displayed on the display means 17.

  When the departure place or destination is designated by the user, the route search means 13 refers to the road data stored in the map storage means 12, searches for the optimum route from the departure place to the destination, and guide route data. Is to create. The search for the optimum route is performed by using various methods such as Dijkstra's method to link and nodes from the road node corresponding to the current position or the starting point designated by the user to the road node corresponding to the destination designated by the user. Search, accumulate link length (link cost) and required time, etc., provide the route with the shortest total link length or total required time as a guide route, and provide road nodes and links belonging to the route as guide route data Is.

  The searched route is displayed on the display means 17 together with the map image, and a current position mark indicating the current position of the vehicle is displayed on the map image. The map image is scrolled as the vehicle travels, and is displayed with the current position detecting means 11 as the center of the display screen. Since the position information detected by the current position detection unit 11 includes an error, when the current position deviates from the road, the matching process is performed by the matching processing unit 18 and is corrected on the road or the route.

  Next, the operation procedure of reverse running notification of the navigation device 1 according to the first embodiment of the present invention will be described with reference to the flowchart of FIG. The flowchart of FIG. 2 shows a processing procedure in a state in which a route search process is performed in the navigation device 1 and the vehicle is traveling while displaying a map image and a route on the display means 17. In addition, it is assumed that a route using a highway is searched for.

  In the navigation device 1, the current position detection means 11 detects the current position of the vehicle at regular time intervals. In the process of step S101, the matching processing means 18 matches the current position of the vehicle with the road link or route link that is running based on the information on the current position.

  In the process of step S101, the vehicle speed detecting means 19 detects the speed of the vehicle and detects whether or not the vehicle speed has been reduced to a predetermined speed or less. If no deceleration is detected, the process of step S101 is repeated. Vehicle speed detection by the vehicle speed detection means 19 is performed at predetermined time intervals, and information on the detected vehicle speed is stored in the discrimination information storage means 15 as history information. Similarly, the traveling direction detection unit 20 detects the traveling direction of the vehicle at predetermined time intervals, and the detected traveling direction information is stored in the discrimination information storage unit 15 as history information.

  If it is determined in the determination process in step S102 that the speed of the vehicle has become equal to or lower than the predetermined speed, the process proceeds to step S103, and the reverse travel determination means 14 before the deceleration is detected from the determination information storage means 15 Get information on the direction of travel of the vehicle. Then, the process proceeds to step S104, and the current traveling direction of the vehicle is acquired from the traveling direction detection means 20 or the discrimination information storage means 15 and compared with the traveling direction before deceleration.

  In step S105, the reverse running discrimination means 14 discriminates the comparison result and discriminates whether the traveling directions before and after deceleration are opposite. If the traveling direction is not reversed, it is assumed that the vehicle is traveling normally along the traveling direction link of the expressway, and the process returns to step S101. If it is determined that the traveling direction is reverse, the process proceeds to step S106, where it is determined that the vehicle has run backward, the fact is notified using the display means 17, and the process ends. Various other methods such as voice notification, notification by vibration, and lighting of a warning lamp can be used as the notification method.

  In the first embodiment, when the vehicle is decelerated to a predetermined speed or less, the traveling direction of the vehicle before and after the vehicle is compared to determine reverse running, but the current position of the vehicle matches before and after the deceleration. It is also possible to determine reverse running by comparing the traveling directions of the road links.

  FIG. 3 is a flowchart showing an operation procedure of reverse running notification of the navigation device 1 according to the second embodiment of the present invention using such a determination method. In addition, the structure of the navigation apparatus 1 in Example 2 is the same as that of the navigation apparatus 1 of Example 1 shown in FIG.

  In the flowchart of FIG. 3, a route search process is performed in the navigation device 1, and a processing procedure in a state where the vehicle is traveling while displaying a map image and a route on the display unit 17 is shown. In addition, it is assumed that a route using an expressway is searched for.

  In the navigation device 1, the current position detection means 11 detects the current position of the vehicle at regular time intervals. In the process of step S201, the matching processing means 18 matches the current position of the vehicle with the road link or route link that is running based on the information on the current position. Information about the matched road link and the direction (traveling direction) of the road link is stored in the discrimination information storage unit 15 as history information.

  In the process of step S101, the vehicle speed detecting means 19 detects the speed of the vehicle and detects whether or not the vehicle speed has been reduced to a predetermined speed or less. If no deceleration is detected, the process of step S201 is repeated. Vehicle speed detection by the vehicle speed detection means 19 is performed at predetermined time intervals, and the detected vehicle speed information is stored in the discrimination information storage means 15 as history information. Similarly, the traveling direction detection unit 20 detects the traveling direction of the vehicle at predetermined time intervals, and the detected traveling direction information is stored in the discrimination information storage unit 15 as history information.

  If it is determined in the determination process of step S202 that the speed of the vehicle has become equal to or lower than the predetermined speed, the process proceeds to step S203, where the reverse running determination means 14 before the deceleration is detected from the determination information storage means 15. The information of the road link and the traveling direction in which the vehicle is matched to is acquired. And it progresses to the process of step S204 and compares the advancing direction of the road link matched based on the present vehicle position, and the advancing direction of the road link before deceleration.

  In the discrimination process in step S205, the reverse running discrimination means 14 discriminates the comparison result and discriminates whether or not the traveling directions before and after the deceleration are opposite. If the traveling direction is not reversed, it is assumed that the vehicle is traveling normally along the traveling direction link of the expressway, and the process returns to step S201. If it is determined that the traveling direction is reverse, the process proceeds to step S206, where it is determined that the vehicle has run backward, the fact is notified using the display means 17, and the process ends. Various other methods such as voice notification, notification by vibration, and lighting of a warning lamp can be used as the notification method.

  In the comparison in step S204, the current traveling direction of the road link that is currently matched is used as the traveling direction of the vehicle. The current traveling direction is obtained from the traveling direction detection means 20 or the discrimination information storage means 15. It can also be obtained and compared with the traveling direction of the road link before deceleration.

  As described above in detail, according to the navigation device 1 of the present invention, it is possible to notify and warn by detecting reverse running of a vehicle traveling on a highway without installing special equipment on the road facility or vehicle. Will be able to.

It is a block diagram which shows the structure of the navigation apparatus concerning Example 1 of this invention. It is a flowchart which shows the operation | movement procedure of the navigation apparatus concerning Example 1 of this invention. It is a flowchart which shows the operation | movement procedure of the navigation apparatus concerning Example 2 of this invention.

Explanation of symbols

1: navigation device 10: control means 11: current position detection means 12: map storage means 13: route search means 14: reverse running discrimination means 15: discrimination information storage means 16: input means 17: display means 18: matching processing means 19 : Vehicle speed detection means 20: Traveling direction detection means

Claims (4)

Based on the current position detecting means for detecting the current position, the map storing means for storing the map information, the map information stored in the map storing means and the current position detected by the current position detecting means. In a navigation device comprising matching control means for detecting a matching road type while matching on a road of map information,
The navigation device includes reverse running determination means for determining reverse running,
A navigation device characterized in that, when it is detected by the matching control means that the current position is matched to an expressway section, if reverse running is determined by the reverse running determination means, a notification to that effect is given. The navigation device includes speed detection means for detecting a movement speed, and discrimination information storage means for storing the movement speed detected by the speed detection means,
The reverse running detecting means detects the moving speed at a predetermined time interval, stores the moving speed in the discrimination information storage means, and refers to the discrimination information stored in the discrimination information storage means. 2. The navigation device according to claim 1, wherein when it is detected that the moving speed is decelerated below a predetermined speed, reverse running is determined based on a traveling direction before and after the deceleration. The navigation device includes speed detection means for detecting a movement speed, and discrimination information storage means for storing the movement speed detected by the speed detection means,
The reverse running detecting means detects the moving speed at a predetermined time interval, stores the moving speed in the discrimination information storage means, and refers to the discrimination information stored in the discrimination information storage means. When it is detected that the moving speed is decelerated below a predetermined speed, the direction of the road link currently matched by the matching control means and the direction of the road link matched by the matching control means before the deceleration are determined. 2. The navigation apparatus according to claim 1, wherein the navigation device determines that the vehicle runs backward when the directions of both road links are reversed. The navigation device includes speed detecting means for detecting a moving speed, discrimination information storing means for storing the moving speed detected by the speed detecting means, and a traveling direction detecting means for detecting a traveling direction,
The reverse running detection means detects the traveling direction by the traveling direction detection means, stores the traveling direction in the discrimination information storage means, and refers to the discrimination information stored in the discrimination information storage means to determine a vehicle speed. 2. When it is detected that the vehicle has been decelerated below the speed, the traveling direction before deceleration is compared with the current traveling direction, and when the traveling direction is opposite, it is determined that the vehicle is traveling backward. The navigation device described in 1.

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