JP5005939B2 - Guidance system - Google Patents

Description

  The present invention relates to a guidance system. Specifically, the present invention relates to a guidance system that guides an intersection to be stopped when making a right turn.

When a vehicle turns right at an intersection, an oncoming vehicle may collide from the front and right sides of the vehicle. Therefore, the driver needs more care when turning right at the intersection than when turning left. In order to solve such a problem, an invention for supporting driving at the time of a right turn at an intersection is disclosed.
For example, an invention is disclosed in which a change in a signal state is detected when turning right at an intersection and the signal state is presented to the driver (Patent Document 1). As a result, the driver can make a right turn while checking the state of the signal, and thus can make a right turn action smoothly.
Japanese Patent Laid-Open No. 2005-216086

By the way, after turning right at a wide intersection, there is an intersection where a traffic light is installed in front of the vehicle. Such intersections include an intersection that seeks to stop if the traffic light is red (hereinafter referred to as the first specific intersection) and an intersection that does not require a stop even if it is a red signal (hereinafter referred to as the second specific intersection). And). Therefore, a driver who wants to make a right turn at an intersection needs to determine whether to stop after making a right turn. However, before entering the intersection, the driver cannot determine whether the intersection is to be stopped. Therefore, after making a right turn, a red signal is confirmed, and the presence / absence of a stop line is confirmed to determine whether or not to stop for the first time. Therefore, a driver who turns right at the intersection may get lost and may cause a traffic accident.
Then, this invention makes it a subject to provide the system which guides the driver who is going to turn right at a wide intersection whether it is an intersection which should stop after a right turn.

  In order to solve the above problems, the present invention has the following configuration. That is, the first configuration of the present invention is map data including position information of a first specific intersection where there is a stop line after a right turn and a second specific intersection where there is no stop line after a right turn. Storage means for storing the first guidance data relating to the first specific intersection and the second guidance data relating to the second specific intersection, and when the vehicle is about to turn right at the first specific intersection Guidance means for guiding the contents of the first guidance data and guiding the contents of the second guidance data when the vehicle is going to turn right at the second specific intersection. System.

  According to the first configuration described above, when there is position information on a first specific intersection where a stop line exists after a right turn with respect to a wide intersection, and the user wants to make a right turn at the first specific intersection First guidance is made. Further, after having a right turn, the vehicle has position information regarding a second specific intersection where no stop line exists, and second guidance is provided when attempting to turn right at the second specific intersection. Here, for example, as the first guidance, guidance is provided that a stop line exists after a right turn at a specific intersection. As the second guidance, there is guidance that there is no stop line after a right turn at a specific intersection. That is, the driver can grasp whether or not a stop line exists after the intersection makes a right turn when the driver enters the right turn operation. Therefore, it is possible to perform operation corresponding to the presence or absence of a stop line when turning right.

In the second configuration of the present invention, the guidance is performed by voice in the first configuration.
Thereby, even when the right turn operation is started, the driving operation can be performed without taking the line of sight from the signal.

FIG. 1 is a block diagram of a guidance system 10 according to an embodiment of the present invention. FIG. 2 is a flowchart for explaining the operation of the guidance system 10. FIG. 3A is a diagram showing the first guidance displayed on the display unit 25, and FIG. 3B is a diagram showing the second guidance displayed on the display unit 25.
FIG. 4 is a diagram showing the arrangement of intersections (first specific intersections) that are wide intersections and have a stop line after a right turn. The first specific intersection 100 has a stop line 106 after a right turn, and the vehicle 105 must stop when the traffic light 103 is red.
FIG. 5 is a diagram showing the arrangement of intersections (second specific intersections) that are wide intersections and have no stop line after a right turn. The second specific intersection 200 does not have a stop line after a right turn, and can travel in the direction of arrow A even when the traffic light 203 is red. At this time, since the traffic light 204 may be a green signal, the vehicle 206 may travel in the direction of arrow B.

In FIG. 1, the guidance system 10 includes a control unit 11, a navigation unit 20, a guidance unit 31, a vehicle signal detection unit 32, and a storage unit 40.
The control unit 11 includes a CPU 12. Each element constituting the driving support system 10 is connected to the CPU 12 via a bus and is controlled. The CPU 12 controls each element by reading and executing the control program stored in the control program storage area 41 of the storage unit.

  The navigation unit 20 includes a navigation system 21, a GPS receiver 22, a beacon receiver 23 and an FM multiplex receiver 24, a display unit 25, an operation unit 26, a speaker unit 27, various sensors (such as a gyro sensor) 28, and the like. The navigation system 21 performs overall control of other elements provided in the navigation unit 20. The GPS receiver 22 receives a signal output from a GPS satellite via a GPS antenna, and supplies the current vehicle position and vehicle direction to the navigation. The display unit 25 is a device that displays the contents of navigation, and a liquid crystal monitor or the like is used. The operation unit 26 is a device for operating navigation. The speaker unit 27 is a device that conveys a voice such as navigation guidance or a warning. Data (first guidance data, second guidance data) that is guided when making a right turn at a specific intersection can also be output as voice.

When the vehicle is about to turn right at a specific intersection, the guidance unit 31 reads out guidance data associated with the specific intersection from the guidance data storage area 43 and guides the driver. When the vehicle turns right at the first specific intersection, the first guidance data 431 is read and guided to the driver. When the vehicle turns right at the second specific intersection, the second guidance data 432 is read and guided to the driver.
The vehicle signal detection unit 32 detects a driving operation signal of the driver (a signal for determining whether the vehicle turns right). The signal to be detected is not particularly limited as long as the signal indicates that the vehicle turns to the right. For example, a right turn signal may be detected.

As the storage unit 40, a general storage medium such as a DVD or CD-ROM, a storage device such as a hard disk, or the like is used. The storage unit 40 includes a control program storage area 41, a map data storage area 42, and a guidance data storage area 43.
The control program storage area 41 stores a control program for operating the CPU 12.
The map data storage area 42 stores map data used for navigation. This map data is composed of general map data, and includes, for example, road distance and width, coordinates of intersections and railroad crossings, coordinates of road markings, and the like.

  The map data storage area 42 includes first specific intersection data 421 and second specific intersection data 422. The first specific intersection data 421 is a wide intersection and is data regarding an intersection where a stop line exists after a right turn, and includes position information thereof. The second specific intersection data 422 is a wide intersection and is data regarding an intersection where no stop line exists after a right turn, and includes position information thereof.

  The guide data storage area 43 stores first guide data and second guide data. The first guidance data is associated with the first specific intersection, and is used as data to be guided to the driver when making a right turn at the first specific intersection. The content of the guidance data may be content that notifies that a stop line exists after a right turn. For example, the guidance data may be displayed on a display or notified by voice. The second guidance data is associated with the second specific intersection and is used as data to be guided to the driver when making a right turn at the second intersection. The content of the guidance data only needs to be a content that informs that there is no stop line after a right turn. Similarly, the guidance data may be displayed on the display or notified by voice.

  The predetermined distance data storage area 44 is a distance associated with the first specific intersection and the second specific intersection. When the current position of the vehicle reaches this predetermined distance, a notification that the vehicle is approaching any specific intersection is notified. The position of the start point of the predetermined distance associated with the specific intersection side is arbitrary, and for example, a stop line painted on the road entering the specific intersection may be used as the start point. The predetermined distance is arbitrary, and can be set to 50 m, for example.

Next, the operation of the guidance system 10 when navigation is in the guidance mode will be described using the flowchart of FIG.
After the vehicle starts traveling (step 1), it is confirmed whether there is a specific intersection on the route specified by the navigation (step 3). And the predetermined distance linked | related with the confirmed specific intersection is read from the predetermined distance data storage area 44 (step 5).
Then, when the current position of the vehicle reaches a predetermined distance (step 7: Y), if the confirmed specific intersection is the first specific intersection (step 9: Y), the first from the guidance data storage area 43 The first guidance is displayed on the display unit 25 (step 11). On the other hand, if the confirmed specific intersection is the second intersection (step 9: N), the second guidance is read from the guidance data storage area 43 and the second guidance is displayed on the display unit 25 (step 13). ).
Thereafter, when the vehicle signal detection unit 32 detects the signal of the right turn signal (step 15: Y), the selected guidance is notified by voice (step 17). On the other hand, when the route specified on the specific intersection is changed and the vehicle does not turn right and the right turn signal is not detected (step 15: N), the guidance displayed on the display unit 25 is closed (step S15). 19).

  FIG. 3A shows the first guidance displayed on the display unit 25, and FIG. 3B shows the second guidance displayed on the display unit 25. The first guidance is displayed to the driver who turns right at the first intersection. Since the driver who has received this guidance can recognize that there is a stop line after making a right turn at the intersection, the driver can perform a driving operation in accordance with the regulation marking at the intersection. The second guidance is displayed to the driver turning right at the second intersection. The driver who has received this guidance can perform a driving operation assuming that an oncoming vehicle is coming from the left side (in the direction of arrow B in FIG. 6) after turning right at the intersection.

FIG. 6 is a block diagram of a guidance system 50 according to another embodiment. The same elements as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.
The guidance system 50 includes a specific intersection detection unit 33. The specific intersection detection unit 33 detects that the vehicle has approached the specific intersection from a specific direction. The distance at which the vehicle can detect the specific intersection can be arbitrarily set from the operation unit 26, and can be set to 50 m, for example. Here, the specific direction refers to the direction in which the vehicle approaches the specific intersection, that is, the direction in which the distance between the vehicle and the specific intersection decreases. Thereby, even when the navigation is not in the guidance mode, the guidance can be notified at the timing when the vehicle approaches the specific intersection.

Next, the operation of the guidance system 50 when the navigation is not in the guidance mode will be described using the flowchart of FIG.
When the vehicle starts traveling (step 21) and the vehicle approaches a distance at which a specific intersection can be detected (step 23: Y), it is determined whether or not the vehicle has approached from a specific direction. When the vehicle approaches a specific intersection from a specific direction (step 25: Y), it is determined by using the map data stored in the map data storage area 42 whether or not the approached specific intersection is the first specific intersection ( Step 27). When it is the first specific intersection (step 27: Y) and then a right turn signal is detected (step 29: Y), the first guidance data is read from the guidance data storage area 43, and the display unit 25 The first guidance data is displayed on (Step 31). On the other hand, when it is not the first specific intersection (step 27: N) and then a right turn signal is detected (step 33: Y), the second guidance data is read from the guidance data storage area 43 and displayed. The second guidance data is displayed on the unit 25 (step 35). If you pass through a specific intersection but do not detect a right turn signal (for example, when you are going to turn right at a specific intersection but go straight), the guidance is not displayed and the next specific intersection is displayed. (Step 29: N, Step 33: N).
After the guidance data is displayed on the display unit 25, the first or second guidance data is sounded from the speaker unit 27 (step 37).
Thus, even when the navigation is not in the guidance mode, it is possible to notify the guidance at the timing when the vehicle approaches the specific intersection.

  The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims.

FIG. 1 is a block diagram of a guidance system according to an embodiment of the present invention. FIG. 2 is a flowchart for explaining the operation of the guidance system. 3A is a diagram showing a first guide displayed on the display unit, and FIG. 3B is a diagram showing a second guide displayed on the display unit. FIG. 4 is a diagram illustrating an arrangement of intersections (first specific intersections) having a stop line after a right turn. FIG. 5 is a diagram showing the arrangement of intersections (second specific intersections) without a stop line after a right turn. FIG. 6 is a block diagram of a guidance system according to another embodiment. FIG. 7 is a flowchart for explaining the operation of the guidance system according to another embodiment.

Explanation of symbols

10 50 guidance system, 31 guidance section, 40 storage section, 100 first intersection, 200 second intersection

Claims (2)

If the traffic light installed at the front of the vehicle is a red signal after turning right, the first specific intersection and the wide intersection that should be stopped at the traffic signal according to the red signal Then, after turning right, even if the traffic light installed in front of the vehicle is a red traffic light, the map data including position information of a second specific intersection that is an intersection that does not require a stop at the traffic light, and the first The first guidance data related to the specific intersection is the content that the traffic light should stop according to the red signal after the right turn, and the second guidance data related to the second specific intersection does not require a stop at the traffic light after the right turn. Storage means for storing the content of the effect ;
When the vehicle tries to turn right at the first specific intersection, it guides the contents of the first guidance data, and when the vehicle tries to turn right at the second specific intersection, the contents of the second guidance data Guidance means for guiding;
A guidance system comprising: Guidance system of claim 1, prior Symbol guidance is performed by voice, it is characterized.

Images