JP2011106960A - On-vehicle device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle device capable of suppressing increase in storage capacity to the utmost, while properly preventing a vehicle from traveling in a direction forbidden by ordinance, or the like, in a one-way street. <P>SOLUTION: The on-vehicle device 1 extracts a one-way street in the vicinity of the current location of the vehicle, and searches map data for the direction allowing passage in the one-way street extracted. The on-vehicle device 1 determines the direction in which the vehicle should travel, on the basis of the direction allowing the passage obtained by the search. The on-vehicle device 1 compares the direction in which the vehicle should travel and the direction in which the vehicle is traveling, and determines whether the two directions are different regarding the one-way street. When it is determined that the two directions are different, the on-vehicle device 1 issues notification using sound or image and issues an alarm to the driver. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an in-vehicle device.

  Conventionally, the position of the end of a road such as an automobile-only road (hereinafter referred to as a one-way road) where passage of vehicles in a certain direction is prohibited by laws and regulations, and in which direction the vehicle is If there is an end of a one-way road within a predetermined distance from the current location of the vehicle, the direction in which the vehicle should approach toward the end and the direction in which the vehicle is currently traveling are stored in advance. If each indicates the opposite direction, an in-vehicle device that warns the driver that the vehicle may enter a one-way road in the prohibited direction. It has been proposed (Patent Document 1).

  This conventional vehicle-mounted device, for example, in a parking area, service area, or other resting facility, when the vehicle approaches the deceleration lane that travels when the vehicle tries to enter the resting facility from an automobile-only road, A warning can be given to the driver.

JP 2007-139531 A

  However, this conventional vehicle-mounted device stores the direction in which the vehicle should approach for each end of a one-way road that needs to be warned that the vehicle is about to enter a prohibited direction. Since this is necessary, there is a problem that the storage capacity becomes large.

  Therefore, an object of the present invention is to provide an in-vehicle device that can appropriately prevent a vehicle from traveling in a direction prohibited by laws and regulations while suppressing an increase in storage capacity as much as possible.

  An in-vehicle device according to the present invention specifies road direction storage means for storing a predetermined direction for a one-way road in which a vehicle is permitted to pass in a predetermined direction, and specifies a current position of the vehicle. Based on the current location specifying means and the direction in which the vehicle is permitted to be stored in the road direction storage means for the one-way road near the current position of the vehicle specified by the current location specifying means. A traveling direction determining means for determining a direction to be traveled, a traveling direction identifying means for identifying the traveling direction of the vehicle, a traveling direction of the vehicle identified by the traveling direction identifying means, and a traveling direction determining means Different direction determination means for determining whether or not the determined direction of the vehicle to travel is different, and determination of the traveling direction and the traveling direction of the vehicle identified by the traveling direction identification means When the direction should travel of the vehicle as determined by the stage is determined by different and different direction determination means, in which and a notifying means a predetermined notification with sound or image or both.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle-mounted apparatus which can prevent appropriately the driving | running | working of the vehicle in the direction prohibited by the laws | regulations etc. can be provided, suppressing increase of memory capacity as much as possible.

It is a block diagram of the vehicle-mounted apparatus by one Embodiment of this invention. It is a figure for demonstrating the condition where the vehicle carrying the vehicle-mounted apparatus of one Embodiment of this invention is drive | working in the service area connected with the motor vehicle exclusive road. It is a figure which shows an example of the relationship between the road and the node and link which are contained in map data. It is a figure which shows an example of the method of expressing as a map data the direction where traffic is permitted about each road. It is a flowchart explaining the process for preventing the vehicle carrying the vehicle-mounted apparatus in one Embodiment of this invention from setting the one-way road to the direction prohibited by the laws and regulations. It is a figure explaining an example of the method of extracting the road in the present location vicinity of a vehicle. It is a figure for demonstrating an example of the method of determining whether the direction in which the passage of the vehicle on the one-way road is permitted differs from the direction in which the vehicle is drive | working. It is a figure which shows an example of the measuring method of the distance between the present location of a vehicle, and the one way road. It is a figure which shows an example of the map data which cannot distinguish the road in a service area, and the deceleration lane which is a road for entering there. It is a figure for demonstrating the method of distinguishing two irrespective of map data, when the road in a service area and a deceleration lane cannot be distinguished on map data.

  FIG. 1 shows a configuration of an in-vehicle device that performs processing for preventing a vehicle from traveling on a one-way road in a direction prohibited by laws and regulations according to an embodiment of the present invention. The in-vehicle device 1 in FIG. 1 includes a control unit 10, an HDD 11, a gyro sensor 20, a GPS receiving unit 21, a display monitor 30, and a speaker 31.

  The control unit 10 is a part for executing various processes and controls for operating the in-vehicle device 1, and includes a microprocessor, various peripheral circuits, RAM, ROM, and the like. As will be described later, the control unit 10 executes a process for preventing the vehicle from traveling on a one-way road in a direction prohibited by laws and regulations.

  The HDD 11 is a non-volatile storage medium that can store various programs and data. The HDD 11 stores map data for displaying a map. This map data has information for identifying whether each road is a one-way road, and the direction in which vehicles are permitted to pass on each one-way road (hereinafter referred to as a “passable direction”). It also has information indicating.

  The HDD 11 also stores predetermined image and audio data for performing predetermined notification for the purpose of alerting the driver in various situations. These data are read by the control unit 10.

  The gyro sensor 20 is a sensor for detecting the angular velocity of the vehicle on which the in-vehicle device 1 is mounted. The GPS receiving unit 21 receives a GPS signal transmitted from a GPS satellite and outputs it to the control unit 10. The GPS signal includes information for specifying the position of the in-vehicle device 1 and thus the position of the vehicle on which the in-vehicle device 1 is mounted. Similarly, this GPS signal includes information for specifying the azimuth of the vehicle on which the in-vehicle device 1 and, in turn, the in-vehicle device 1 is mounted (that is, the direction in which the vehicle is traveling). The control unit 10 can specify information on the position and traveling direction of the vehicle on which the in-vehicle device 1 is mounted by performing a calculation based on the GPS signal received by the GPS receiving unit 21.

  Furthermore, the control unit 10 specifies the position of the vehicle on which the vehicle-mounted device 1 that changes from time to time is based on the GPS signal received by the GPS receiver 21, so that the vehicle on which the vehicle-mounted device 1 is mounted. It is also possible to specify information regarding the travel distance of the vehicle, that is, the distance traveled by the vehicle on which the in-vehicle device 1 is mounted. Further, the traveling speed of the vehicle can be specified based on the distance traveled by the vehicle on which the in-vehicle device 1 is mounted.

  The in-vehicle device 1 is fixed to the vehicle by a bracket, and various signals are transmitted to and received from the vehicle via a harness. Thereby, the vehicle-mounted apparatus 1 can acquire information, such as that the ignition key was turned on and the traveling speed of the vehicle, for example.

  As described above, the control unit 10 specifies the position and traveling direction of the vehicle on which the in-vehicle device 1 is mounted based on the GPS signal received by the GPS receiving unit 21. However, when the vehicle equipped with the in-vehicle device 1 is traveling in a tunnel, or when there is a vehicle equipped with the in-vehicle device 1 in the service area under the overhead, the GPS receiving unit 21 performs GPS. In consideration of the case where the signal cannot be received, the control unit 10 normally detects the angular velocity of the vehicle detected by the gyro sensor 20, the traveling speed of the vehicle transmitted from the vehicle on which the in-vehicle device 1 is mounted via the harness, and Based on the map data stored in the HDD 11, information on the position and traveling direction of the vehicle on which the in-vehicle device 1 is mounted is specified, and based on the GPS signal periodically received by the GPS receiving unit 21, the information Correction is performed.

  The display monitor 30 is a device for performing various screen displays, and includes a liquid crystal display or the like. When it is determined that the vehicle on which the in-vehicle device 1 is mounted travels in a direction prohibited by laws and regulations, the display monitor 30 displays a predetermined image stored in the HDD 11 described above.

  The speaker 31 outputs audio based on the audio signal output from the control unit 10. When it is determined that the vehicle on which the in-vehicle device 1 is mounted travels in a direction prohibited by laws and regulations, the speaker 31 outputs a predetermined sound stored by the HDD 11 described above.

  FIG. 2 is a diagram for explaining a situation when a vehicle equipped with the vehicle-mounted device according to the embodiment of the present invention is traveling in a service area connected to an automobile-only road. The service area 300 is an area that is connected to the automobile exclusive road 301 by the deceleration lane 302 and the acceleration lane 304, and is an area in which the vehicle can face or run in various directions for parking or the like. The deceleration lane 302 is a road for a vehicle to enter the service area 300 from the automobile-only road 301. The acceleration lane 304 is a road for the vehicle to return from the service area 300 to the automobile exclusive road 301. Note that the automobile exclusive road 301, the deceleration lane 302, and the acceleration lane 304 are one-way roads in which vehicle passage in a certain direction is prohibited.

  The service area 300 is provided with a parking area 305 in which a vehicle can be parked, a commercial facility (not shown) for the convenience of the user, etc. Around the parking section 305, there are roads (hereinafter referred to as service area roads) indicated by reference numerals 303a to 303d. These roads are the above-described automobile road 301, deceleration lane 302 and acceleration lane 304. Similarly, it is a one-way street. The purpose of these roads to be one-way is to facilitate the passage of a vehicle that has entered the parking section 305 via the deceleration lane 302 toward the acceleration lane 304 so as to join the automobile exclusive road 301. In addition, the accessible directions defined for the service area roads 303a to 303d are the directions indicated by the arrows 323a to 323d, respectively. Such information relating to the accessible direction is stored in the map data of the HDD 11 together with information indicating that the road is within the service area. In FIG. 2, the current position of the vehicle (hereinafter, the current location) is indicated by reference numeral 310, and the traveling direction of the vehicle is indicated by an arrow indicated by reference numeral 320. In the parking section 305, the vehicle is allowed to face in various directions for parking.

  FIG. 3 is a diagram for explaining the map data according to the embodiment of the present invention. The map data includes data related to a plurality of nodes and a plurality of links. A node is an element in map data provided for convenience to represent a predetermined place such as an intersection on a road. The data relating to one node includes information for identifying the node, the position of the node (for example, represented by coordinates), information indicating an adjacent node, and connecting the node and the adjacent node. Information for identifying the link is included. A link is an element in map data provided for convenience in order to represent a road connecting two predetermined locations. The data related to one link includes information for identifying the link, and the type of road corresponding to the link (for example, a general road, a road dedicated to a car, a road in a service area, a deceleration lane, an acceleration lane, Information indicating the parking section), information indicating the name of the road corresponding to the link, information indicating the direction in which traffic is allowed on the road corresponding to the link, and the like. At the end point of each link, there is a node representing a predetermined location.

  FIG. 3 is a diagram conceptually illustrating map data in which 12 nodes represented by reference numerals N01 to N12 and links L01 to L13 connecting the nodes exist. In FIG. 3, each link represents the aforementioned service area road, deceleration lane, acceleration lane, and automobile roads around them. For example, the automobile exclusive road is represented by links L01 to L05 (hereinafter referred to as main links) connecting the nodes N01 to N06, respectively. The road in the service area includes a link L07 between the node N09 and the node N10, a link L08 between the node N10 and the node N11, a link L09 between the node N11 and the node N12, and the node N09 and the node N12. Each is represented by a link L10. Hereinafter, these links L07 to L10 are referred to as SA links. The deceleration lane and the acceleration lane are respectively represented by a link L06 between the node N03 and the node N09, and a link L11 between the node N12 and the node N04, and these will be referred to as connecting road links. The link L12 between the node N07 and the node N02 and the link L13 between the node N05 and the node N08 represent roads for connecting the main line link to other main line links. These are also called connection path links.

  Data representing a link is represented by a bit string having a predetermined number of bits. The bit string includes a bit representing the direction in which the link can pass. A bit representing the direction in which the link can pass will be described with reference to FIG. In FIG. 4, the link passable direction will be described using a link L51 connecting the node N51 and the node N52 as an example. In FIG. 4, there are 2 bits indicating the passable direction of the link L51, and the patterns include P1 (representing “00”), P2 (representing “01”), P3 (representing “10”), And P4 (representing “11”). When the link L51 can pass in both directions, that is, both the direction from the node N51 to the node N52 and the direction from the node N52 to the node N51, the bit indicating the passable direction of the link is the pattern P1 (“00”). Become. When the link L51 is one-way in which the direction from the node N52 to the node N51 is prohibited, the bit indicating the link-passable direction is the pattern P2 (“01”). When the link L51 is one-way in which the direction from the node N51 to the node N52 is prohibited, the bit indicating the link-accessible direction is the pattern P3 (“10”). When the link L51 is prohibited from passing both in the direction from the node N51 to the node N52 and in the direction from the node N52 to the node N51, the bit indicating the direction in which the link can pass is the pattern P4 (“11”). The direction in which the links included in the map data can pass is represented by any one of these patterns P1 to P4.

  FIG. 5 shows a process for preventing a vehicle equipped with the vehicle-mounted device implemented by the control unit 10 of the vehicle-mounted device 1 of the present embodiment from turning a one-way road in a direction prohibited by laws and regulations. It is a flowchart for demonstrating.

  In step S <b> 501, the control unit 10 determines whether or not the vehicle-mounted device 1, and thus the vehicle on which the vehicle-mounted device 1 is mounted, is in the service area based on the GPS signal received by the GPS receiving unit 21. Wait until it is determined that the service area exists. If it is determined that the vehicle on which the in-vehicle device 1 is mounted is present in the service area, the process proceeds to step S502.

  In step S501, whether or not the vehicle on which the in-vehicle device 1 is mounted is in the service area may be determined based on, for example, whether or not the vehicle has traveled in a deceleration lane and an acceleration lane. When the vehicle travels in the deceleration lane 302 of FIG. 2 and has not yet traveled in the acceleration lane 304, it can be determined that the vehicle still exists in the service area 300. Further, when the road nearest to the vehicle is a road in the service area, it may be determined that the vehicle exists in the service area. Or you may perform determination of step S501 by determining whether the present location of the said vehicle exists in the parking area in a service area based on map data.

  In step S502, the control unit 10 extracts a service area road in the vicinity of the current location of the vehicle on which the vehicle-mounted device 1 is mounted, and searches the map data for possible directions for the extracted service area road. And the direction which the said vehicle should drive within a service area is determined based on the passable direction obtained by the search. When the direction in which the vehicle on which the in-vehicle device 1 is mounted is determined, the process proceeds to step S503.

  In step S503, the control unit 10 determines whether the direction in which the vehicle on which the vehicle-mounted device 1 is mounted is different from the direction in which the vehicle determined in step S502 is to travel. In the present embodiment, a method for determining whether or not the direction in which the vehicle on which the vehicle-mounted device 1 is mounted should travel and the direction in which the vehicle travels is different will be described later.

  In step S503, when it is determined that the vehicle on which the vehicle-mounted device 1 determined in step S502 is traveling is different from the direction in which the vehicle should travel, the distance traveled by the vehicle in the different direction is acquired. Start. However, if the vehicle on which the in-vehicle device 1 is mounted has already started to acquire the travel distance, it is not necessary to continue that and initialize the acquired travel distance. Note that the travel distance is determined by the time T that has elapsed since it was determined that the direction in which the vehicle on which the vehicle-mounted device 1 is to travel is different from the direction in which the vehicle is traveling, and the vehicle speed V. It can be calculated. The vehicle speed V can be acquired based on the signal transmitted from the vehicle as described above. In addition, based on a comparison between the position when the vehicle on which the vehicle-mounted device 1 is mounted starts to travel in a direction different from the direction in which the vehicle should travel and the current location of the vehicle on which the vehicle-mounted device 1 is mounted, You may acquire a mileage.

  Furthermore, in step S503, when it is not determined that the vehicle is traveling in a direction different from the direction in which the vehicle on which the vehicle-mounted device 1 determined in step S502 is mounted, that is, the vehicle-mounted device 1 is mounted. If it is determined that the vehicle is traveling in the direction to travel, the travel distance acquired so far is initialized to zero.

  In step S504, the control unit 10 determines whether or not the travel distance started to be stored in step S503 exceeds a predetermined threshold, for example, 50m. By performing the determination in step S504, the vehicle on which the vehicle-mounted device 1 is mounted travels in a direction different from the direction in which the vehicle is to be temporarily traveled, for example, when the vehicle is turned back to park the vehicle in the parking area in the service area. In such a case, unnecessary notification can be prevented.

  If it is determined that the travel distance has exceeded the threshold, the process proceeds to step S505. In step S505, the control unit 10 performs a predetermined notification to alert the driver. The control unit 10 controls the display monitor 30 so that the predetermined image is displayed, and controls the speaker 31 so that the predetermined sound is output. The predetermined notification by the display monitor 30 and the speaker 31 is terminated when the traveling direction of the vehicle on which the in-vehicle device 1 is mounted becomes the traveling direction of the vehicle in the parking section 305 or the like. To do.

  A method in which the control unit 10 extracts a road in the vicinity of the current location of the vehicle on which the in-vehicle device 1 is mounted in step S502 will be described with reference to FIG. FIG. 6 shows an example of a road extraction range 311 that is a range for extracting a road in the vicinity of the current location of the vehicle on which the in-vehicle device 1 is mounted. In the present embodiment, the road extraction range 311 is defined as the inside of a circle with a diameter D centered on the current location 310 of the vehicle on which the in-vehicle device 1 is mounted. The control unit 10 searches the map data based on the road extraction range 311 to extract roads included in the road extraction range 311 as roads in the vicinity of the current location of the vehicle on which the in-vehicle device 1 is mounted. And the control part 10 acquires the through direction of the extracted road with reference to map data. As the value of the diameter D, a fixed value such as 10 meters can be applied. Further, instead of or in addition to this fixed value, a variable value such as a distance that can be reached within a predetermined time (for example, within 10 seconds) based on the vehicle speed V of the vehicle on which the in-vehicle device 1 is mounted. Can also be applied as the diameter D. As described above, the vehicle speed V can be acquired based on a signal transmitted from a vehicle on which the in-vehicle device 1 is mounted.

  FIG. 6 shows that a part of the service area road 303 a exists in the road extraction range 311. The control unit 10 specifies a link related to the service area road 303a by referring to the map data, and acquires the accessible direction of the link indicated by the arrow 323a by referring to the map data. And the control part 10 determines the passable direction 323a as a direction which the vehicle in which the vehicle-mounted apparatus 1 is mounted should drive | work.

  A method in which the control unit 10 determines whether or not the direction in which the vehicle on which the vehicle-mounted device 1 is mounted is traveling and the direction in which the vehicle is traveling in step S503 will be described with reference to FIG. . FIG. 7 is a diagram for explaining an example of a method for determining whether or not these two directions are different. In FIG. 7, the control unit 10 determines whether or not the direction 320 in which the vehicle on which the vehicle-mounted device 1 is mounted travels in the situation of FIG. 6 is different from the extracted passable direction 323 a. . Whether or not the two directions are different is determined based on the angle formed by the two directions. The control unit 10 calculates an angle θ formed by the direction 320 in which the vehicle on which the in-vehicle device 1 is mounted travels and the extracted passable direction 323a. Note that the angle θ is considered to be an inferior angle, that is, a range of 0 ° to 180 °. Whether or not the two directions are different is determined by determining in the control unit 10 whether or not the angle θ is equal to or greater than a predetermined angle. The predetermined angle here may be an angle of 90 ° or more, for example, a fixed value such as 135 °. In the example of FIG. 7, the traveling direction 320 of the vehicle on which the in-vehicle device 1 is mounted and the passable direction 323a that is the direction in which the vehicle should travel are at an angle greater than 135 °. Is determined to be traveling in a direction different from the passable direction 323a.

  In step S504, the threshold value may be a predetermined fixed value such as 50 m, or the road in the service area from the current location of the vehicle on which the in-vehicle device 1 is mounted when it is determined in step S503 that the direction is different. It may be a value determined based on the distance L to. For example, a method is conceivable in which the distance L from the current location 310 of the vehicle shown in FIG.

  According to the embodiment described above, the following operational effects are obtained.

(1) The in-vehicle device 1 of the present embodiment travels with a storage medium (HDD 11) that stores the road directions as a part of the map data, and the current location of the vehicle on which the in-vehicle device 1 is mounted. The control unit 10 and the GPS receiving unit 21 that specify the direction, the gyro sensor 20 that detects the direction in which the vehicle on which the vehicle-mounted device 1 is mounted, and the sound and / or the image are used to perform predetermined notification. A display monitor 30 and a speaker 31 are provided. And the control part 10 determines the direction which the said vehicle should drive | work based on the direction which can pass the one way road in the vicinity of the present location of the vehicle in which the vehicle equipment 1 is mounted (step S502 of FIG. 5), It is determined whether or not the direction in which the vehicle on which the vehicle-mounted device 1 is mounted is traveling is different from the direction in which the vehicle is to travel (step S503 in FIG. 5), and it is determined that the two directions are different directions. When this is done, predetermined notification using sound or image or both is performed (step S505 in FIG. 5). In other words, the in-vehicle device 1 uses the map data having the information on the direction in which the one-way road can pass, thereby suppressing the increase in the storage capacity and performing the vehicle passage in the direction prohibited by laws and regulations. Can be prevented. The in-vehicle device 1 does not use an infrastructure such as a public communication line network, and thus has an effect of preventing vehicle traffic in a direction prohibited by laws and regulations at a relatively low cost. .

(2) The in-vehicle device 1 of the present embodiment determines whether or not the current location of the vehicle on which the in-vehicle device 1 is mounted is within the service area (step S501 in FIG. 5), and the vehicle in which the in-vehicle device 1 is mounted. When it is determined that the direction in which the vehicle is traveling is different from the direction in which the vehicle is to travel when in the service area, a predetermined notification is given (step S505 in FIG. 5). When the vehicle is in a special area in the map data, such as a service area, a process different from that on a normal road may be required. Therefore, by determining whether or not the vehicle on which the in-vehicle device 1 is mounted is in such a special area, it is possible to select an optimal process according to the situation where the vehicle is present. As described above, in step S501, whether or not the current location of the vehicle is within the service area depends on whether or not the vehicle on which the vehicle-mounted device 1 is mounted travels in the acceleration lane after traveling in the deceleration lane. Judgment is being made. In this way, determination can be performed regardless of the format of the map data in the service area.

(3) The in-vehicle device 1 of the present embodiment immediately performs predetermined notification even when the direction in which the vehicle on which the in-vehicle device 1 is traveling is different from the direction in which the vehicle is to travel. If it is determined that the distance traveled by the vehicle has reached a predetermined threshold (step S504 in FIG. 5) and the distance traveled by the vehicle has reached a predetermined threshold. As long as a predetermined notification is made. Generally, in a resting facility connected to a one-way road, a vehicle may travel temporarily in a direction different from the direction in which the vehicle should originally travel for the purpose of parking. Can prevent predetermined notifications that are not necessary for such temporary travel.

(4) The in-vehicle device 1 of the present embodiment immediately performs predetermined notification even when the direction in which the vehicle on which the in-vehicle device 1 is traveling is different from the direction in which the vehicle is to travel. If it is determined that the distance traveled by the vehicle has reached a predetermined threshold (step S504 in FIG. 5) and the distance traveled by the vehicle has reached a predetermined threshold. As long as a predetermined notification is made. At this time, the threshold for the distance traveled by the vehicle may be a value based on the distance from the current location of the vehicle to a one-way road such as a road in a service area. In this case, when the distance from the vehicle on which the in-vehicle device 1 is mounted to the one-way road is short, the threshold value can be reduced so that predetermined notification can be made promptly in consideration of urgency.

(5) In the in-vehicle device 1 of the present embodiment, the inferior angle formed by the direction in which the vehicle on which the in-vehicle device 1 is traveling and the direction in which the vehicle should travel is equal to or greater than a predetermined angle (for example, 135 °). If so, a predetermined notification is given on the assumption that the vehicle may travel in a direction prohibited by laws and regulations. Therefore, even if the map data defines only one direction as a one-way road-accessible direction, a predetermined notification is not provided unless the one direction and the direction in which the vehicle is traveling completely match. It is possible to prevent the occurrence of the situation.

(6) The in-vehicle device 1 according to the present embodiment determines the direction in which the vehicle should travel based on the direction in which the one-way road is within a predetermined distance from the current location of the vehicle on which the in-vehicle device 1 is mounted. It was decided to decide. When the current location of the vehicle on which the in-vehicle device 1 is mounted is far away from the one-way road, it is unlikely that the vehicle immediately travels in a direction prohibited by the laws of the one-way road that is far away. For this reason, it is not necessary to perform predetermined notification on the road. Therefore, a determination is made as to whether or not a one-way road outside the predetermined distance is excluded from the determination of the direction in which the vehicle should travel, and whether or not the one-way road is traveling in a direction prohibited by laws and regulations. By avoiding this, it is possible to prevent notification with low necessity.

(7) In step S502 in the present embodiment, the size of the road extraction range 11 may be set based on the speed of the vehicle. The control unit 10 travels in a direction different from the direction in which the vehicle should travel until the vehicle on which the vehicle-mounted device 1 is mounted is approaching on a one-way road and reaches the road. It must be determined whether or not. However, the higher the speed of the vehicle on which the in-vehicle device 1 is mounted, the shorter the time until the vehicle reaches the one-way road that is the determination target. Therefore, when the speed of the vehicle on which the in-vehicle device 1 is mounted is high, and therefore it is expected that the time until the vehicle reaches the one-way road is short, the size of the road extraction range 11 is set as described above. It is preferable to make the above-described determination start earlier by setting the speed based on the vehicle speed.

  The above-described embodiment can be modified as follows.

(1) Although a circle with a diameter D centered on the current location 310 of the vehicle is the road extraction range 311, the shape of the road extraction range 311 is not limited to a circle. In the present embodiment, the direction in which the vehicle should travel is determined for each road in the service area included in the road extraction range 311, but the vehicle should travel on the road in the service area closest to the current location 310 of the vehicle. The direction may be determined. Even in this way, it is possible to reliably determine the direction in which the vehicle should travel in step S502.

(2) The control unit 10 applies a fixed value of 50 m or a value calculated based on the distance L between the current location and the road in the service area as a threshold value, toward a direction different from the direction in which the vehicle should travel. It is determined whether the distance traveled by the vehicle exceeds this threshold. However, this threshold value may be a value calculated based on the distance from the vehicle position to the deceleration lane. In this case, for example, it is desirable to decrease the threshold value as the distance from the vehicle position to the deceleration lane is shorter. Even in this case, the vehicle travels in the direction prohibited by laws and regulations from the service area, and further travels in the direction prohibited by laws and regulations on the motorway via the deceleration lane. Can be surely prevented.

(3) When the vehicle on which the in-vehicle device 1 is mounted is inside the service area, the threshold relating to the travel distance in step S504 may be calculated based on the length of the deceleration lane. In this case, for example, it is desirable to reduce the threshold value as the length of the deceleration lane becomes shorter. Even in this case, it is ensured that the vehicle on which the in-vehicle device 1 is mounted enters the automobile exclusive road from the inside of the service area via the deceleration lane and travels in the direction prohibited by the laws and regulations etc. Can be prevented.

(4) When the vehicle on which the in-vehicle device 1 is mounted is inside the service area, the threshold relating to the travel distance in step S504 may be calculated based on the size of the service area. In this case, it is desirable to reduce the threshold as the size of the service area or the like is smaller. The size of the service area may be calculated based on the total distance of the roads in the service area, the area of the area surrounded by the roads in the service area, and the like. The smaller the size of the service area, the shorter the time it takes for the vehicle equipped with the vehicle-mounted device 1 to enter the road in the service area, which is a one-way road, from the parking area or the like, and it is necessary to promptly notify There is. Therefore, based on the size of the service area or the like, it is possible to perform notification in consideration of urgency.

(5) In the embodiment and the modification described above, several examples are provided as methods for determining a threshold value for determining whether or not the vehicle on which the vehicle-mounted device 1 is mounted is traveling in a direction different from the direction in which the vehicle is to travel. Indicated. Each of these methods may be performed alone or in combination within a range where no technical contradiction occurs.

(6) In the above description, as shown in FIG. 3, the SA link representing the road in the service area and the connecting road link representing the deceleration lane and the acceleration lane can be distinguished on the map data. In FIG. 3, two types of links are distinguished on the basis of the node N09. However, in the map data, there is a possibility that there is no node corresponding to the node N09 for a small service area, or there is a map for which a link road representing a deceleration lane and an acceleration lane is not defined. is there. In such a case, the SA link and the connecting road link cannot be distinguished from the map data, and it is difficult to acquire information such as the distance of the deceleration lane based on the map data. In such a case, what is necessary is just to distinguish a deceleration lane and a service area road by the method demonstrated below.

  FIG. 9 is a diagram illustrating an example of map data in which the SA link and the connecting road link representing the deceleration lane and the acceleration lane cannot be distinguished. FIG. 9 is obtained by deleting the node N09 and the node N12 from FIG. In FIG. 9, a link L14 is newly provided between the node N03 and the node N10. The link L14 is assumed to include a deceleration lane and a part of the road in the service area. Similarly, there is a link L15 between the node N11 and the node N04 in FIG. 9, and the link L15 includes a part of the road in the service area and the acceleration lane.

  In the example of FIG. 9, in order to acquire information such as the distance of the deceleration lane, it is necessary to distinguish between the deceleration lane included in the link L14 and a part of the road in the service area. In such a case, when the vehicle on which the vehicle-mounted device 1 is mounted enters the road represented by the link L14 from the automobile-only road, it is considered that the vehicle has entered the deceleration lane, and then the road on which the vehicle is traveling is extended. When the direction changes greatly for the first time, it may be considered that the vehicle has entered the service area road from the deceleration lane. The time when the extending direction of the road on which the vehicle on which the vehicle-mounted device 1 is mounted is greatly changed is paraphrased as the time when the traveling direction of the vehicle on which the vehicle-mounted device 1 is mounted is greatly changed. Hereinafter, this situation will be described with reference to FIG.

  In the example of FIG. 10, there are an automobile exclusive road 1001, a deceleration lane 1002, and a service area road 1003 as one-way roads. The vehicle is at the current location 1010, and enters the service area road 1003 from the automobile exclusive road 1001 via the deceleration lane 1002 according to the arrow 1020. When a vehicle on which the in-vehicle device 1 is mounted enters the deceleration lane 1002 from the automobile-only road 1001, it is recognized based on map data that the vehicle has entered a road where the deceleration lane 1002 and the road in the service area 1003 cannot be distinguished. . When a vehicle on which the vehicle-mounted device 1 is mounted travels along the deceleration lane 1002, turns left from the deceleration lane 1002 and enters the service area road 1003, the traveling direction of the vehicle is from the extending direction 1022 of the deceleration lane 1002. The service area road 1003 changes in the extending direction 1023. This change is detected by the gyro sensor 20 or the like, and the road that has been running from when the vehicle enters the indistinguishable road until when the running direction of the vehicle on which the in-vehicle device 1 is mounted is the deceleration lane. If it is recognized, the deceleration lane 1002 and the service area road 1003 can be distinguished.

(7) In the description of the embodiment of the present invention, the direction in which the vehicle on which the vehicle-mounted device 1 is mounted travels within the service area 300 based on the direction in which the road within the service area 300 can pass. However, the present invention is not limited to this. For example, the vehicle travels in the service area 300 in a direction in which a road extending substantially parallel to the expressway 301, such as the service area roads 303b and 303d in FIG. The power direction may be used. At this time, it is not necessary to consider the directions in which the roads 303a and 303c in the service area can pass.

(8) In addition, for example, when the service area 300 is provided on the immediate side of the automobile exclusive road 301, the distance between the automobile exclusive road 301 and the service area 300 is short, and the distance of the deceleration lane 302 is long. When the difference between the extension direction of the deceleration lane 302 and the extension direction of the automobile exclusive road 301 in the vicinity thereof is small, the vehicle travels in the service area 300 in the direction in which the deceleration lane 302 can pass. It may be the direction to be.

(9) In the above embodiment, the example in the road in the service area is shown, but the present invention can be applied to other than the service area. In other words, the present invention may also be applied to other facilities installed alongside parking areas, other automobile-only roads, and one-way roads other than automobile-only roads. Moreover, when applying to other facilities, you may abbreviate | omit suitably the process corresponded to step S501.

(10) Moreover, although the vehicle-mounted apparatus 1 in this embodiment can transmit and receive signals to and from the vehicle via the harness, a configuration for transmitting and receiving signals to and from the vehicle is not necessarily required. The present invention may be applied to a mobile phone, a PND (Portable Navigation Device), and other mobile terminals.

  Each embodiment and various modifications described above are merely examples, and the present invention is not limited to these contents as long as the features of the invention are not impaired.

1: On-vehicle device 10: Control unit 11: HDD
20: Gyro sensor 21: GPS receiver 30: Display monitor 31: Speaker 300: Service area 301, 1001: Automobile exclusive road 302: Deceleration lanes 303a to 303d, 1003: Service area road 304: Acceleration lane 305: Parking section 310 , 1010: Current location 311 of the vehicle: Road extraction range 320: Travel direction of the vehicle 323a to 323d: Accessible direction of the road in the service area 1020: Arrow indicating the route on which the vehicle is planned to travel 1022: Extension direction of the deceleration lane 1002 1023: Extension directions N01 to N12, N51, N52 of the road in the service area 1003: Nodes L01 to L15 on the map data: Links on the map data

Claims (10)

An in-vehicle device mounted on a vehicle,
Road direction storage means for storing the predetermined direction with respect to a one-way road in which the vehicle is permitted to pass in a predetermined direction;
Current location specifying means for specifying the current position of the vehicle;
Based on the one-way road in the vicinity of the current position of the vehicle specified by the current location specifying means, the direction of the vehicle that is permitted to pass the vehicle is stored in the road direction storage means. A traveling direction determining means for determining a direction to travel;
A traveling direction identifying means for identifying the traveling direction of the vehicle;
A different direction determination means for determining whether or not the direction of travel of the vehicle specified by the travel direction specification means and the direction of the vehicle determined by the travel direction determination means are different;
When the different direction determining means determines that the direction in which the vehicle is traveling specified by the traveling direction specifying means is different from the direction in which the vehicle is to be determined determined by the traveling direction determining means, A notification means for performing a predetermined notification using sound or image or both;
A vehicle-mounted device comprising: The in-vehicle device according to claim 1,
Vehicle position determination means for determining whether or not the current position of the vehicle specified by the current location specifying means is within an area connected to the one-way road;
The informing means is different from the direction in which the vehicle that is specified by the advancing direction specifying means is different from the direction in which the vehicle is to be determined that is determined by the advancing direction determining means. An in-vehicle device that performs the notification when it is determined and the vehicle position determination means determines that the vehicle is in the area. The in-vehicle device according to claim 2,
The informing means is different from the direction in which the vehicle that is specified by the advancing direction specifying means is different from the direction in which the vehicle is to be determined that is determined by the advancing direction determining means. And when the distance traveled by the vehicle reaches a predetermined threshold while the vehicle position determining means determines that the vehicle is in the area, the notification is performed. In-vehicle device. The in-vehicle device according to claim 3,
The vehicle-mounted device, wherein the predetermined threshold is determined based on a size of the area. The in-vehicle device according to claim 3 or 4,
When there is a road between the area and the one-way road, the predetermined threshold is determined based on a length of a road between the area and the one-way road. In-vehicle device. The in-vehicle device according to claim 1,
The informing means is different from the direction in which the vehicle that is specified by the advancing direction specifying means is different from the direction in which the vehicle is to be determined that is determined by the advancing direction determining means. The in-vehicle device characterized in that the notification is performed when a distance traveled by the vehicle reaches a predetermined threshold while being determined. The in-vehicle device according to any one of claims 3 to 6,
The vehicle-mounted device, wherein the predetermined threshold is determined based on a distance between a current position of the vehicle specified by the current location specifying unit and the one-way road. The in-vehicle device according to any one of claims 1 to 7,
The different direction determination means is preset with an inferior angle formed by the direction in which the vehicle should travel determined by the travel direction determination means and the direction in which the vehicle travels detected by the travel direction detection means. When it is more than a certain angle, it determines with it being the said different direction, The vehicle-mounted apparatus characterized by the above-mentioned. The in-vehicle device according to any one of claims 1 to 8,
The advancing direction determining means determines the direction in which the vehicle should travel on the one-way road closest to the current position of the vehicle based on a direction in which the vehicle is permitted to pass. In-vehicle device. The in-vehicle device according to any one of claims 1 to 9,
The advancing direction determining means determines a direction in which the vehicle should travel based on a direction in which the vehicle is permitted to pass on the one-way road within a predetermined distance from the current position of the vehicle. In-vehicle device characterized by

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