JP3952130B2 - Vehicle navigation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a navigation device that is mounted on a vehicle and performs road guidance.
[0002]
[Related background]
This type of vehicle navigation apparatus displays the searched guidance route on the display to provide road guidance, and when the vehicle approaches a guidance point (intersection, Y-junction, etc.) on the guidance route, The direction of travel is displayed by switching to a screen showing the details of the above, and the direction of travel is presented by voice from a speaker.
[0003]
By the way, when the route guidance is performed at a predetermined guidance point, the more complicated the road network is because there are continuous intersections and Y-shaped roads around the guidance point, the more time is required for the driver to identify the guidance point. Tend. Therefore, as described in, for example, Japanese Patent No. 282654, there is a method that allows the driver to determine the guidance point with a margin by increasing the timing of presentation of the route guidance as the road network becomes more complex.
[0004]
[Problems to be solved by the invention]
However, the above-described vehicle navigation device only pays attention to the difference in the road network, and does not consider any individual difference of the driver. In other words, the time required for the driver to specify a guide point in response to presentation of route guidance is affected by individual differences such as reaction speed and habits, so there are multiple intersections and Y-shaped roads in particular. For example, the guide point specified by the driver is different. This problem cannot be solved simply by simply adjusting the presentation timing, and as a result, there is a problem that a miscourse is induced.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle navigation apparatus capable of always performing route guidance at an appropriate guidance point without being influenced by individual differences among drivers, and thereby reliably performing road guidance along a guidance route. Is to provide.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, road guidance is performed according to the searched guidance route, and route guidance at the guidance point is provided when the vehicle approaches the guidance point on the guidance route to be route guidance. In the vehicle navigation device to be presented to the driver by the route guidance means, a miscourse determination means for judging whether the course has been changed outside the presented guidance point and the course has been mistracked to the near side or the far side from the guidance point ; When it is determined by the miscourse determination means that the course has been mis-routed to the near side from the guidance point, it is determined that the course guidance means has corrected the presentation timing of the route guidance in the direction of delaying, and the mis-course is determined to be behind the guidance point. In such a case, there is provided presentation timing correction means for correcting the direction guidance presentation timing by the route guidance means in a direction to be advanced .
[0007]
Therefore, when a course change is made at an intersection or Y-junction other than the presented guide point, a miscourse determination is made by the miscourse determination means, and the driver tends to make a miscourse ahead of the guide point. In the case where the route guidance presentation timing is delayed, and conversely, the driver has a tendency to make a miscourse behind the guidance point, the route guidance presentation timing is advanced. Thus, even if route guidance is presented at the same timing, or Misukosu in front side of the guiding point by individual differences of the driver, when or Misukosu in the back side of the guiding point to the contrary, the Misukosu Since the presentation timing of the route guidance is changed according to the occurrence situation, as a result, the route guidance is always performed at an appropriate guidance point regardless of the individual difference of the driver.
[0009]
In the invention 請 Motomeko 2, further comprising a Misukosu information storage means for storing a determination result of Misukosu determination means, the presentation timing correcting means, towards the number of Misukosu accumulated in Misukosu information storing means of the front side from the back side If the number of miss courses stored in the miscourse information storage means is greater on the far side than on the near side, the course guidance means The guidance presentation timing has been corrected to advance.
[0010]
Therefore, when many miscourses occur on the front side from the back side, the direction of presentation of the route guidance is corrected to be delayed, and conversely, when many miscourses occur on the back side from the front side, the direction of presentation of the route guidance is advanced. It is corrected to. Therefore, for example, when the driver tends to mis-course to the near side, and the timing for presenting the route guidance should be delayed, even if the driver accidentally mis-courses to the far side at this time, it is presented based on a number of past mis-courses on the near side. Timing is definitely delayed.
[0011]
On the other hand, in the invention of claim 3, the correction when the presentation timing correction means corrects the presentation timing of the route guidance as the difference in the number of miscourses between the near side and the back side stored in the miscourse information storage means increases. The amount was increased.
Therefore, when the difference in the number of miscourses is large, it means that the driver has a strong tendency to miscourse to either the front side or the back side, but in this case, the correction amount is increased, so that it is promptly appropriate. Is corrected to the correct presentation timing.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
A vehicle navigation apparatus according to a first embodiment of the present invention will be described below.
FIG. 1 is an overall configuration diagram showing a vehicle navigation device of the present embodiment. A navigation ECU (electronic control unit) 1 that performs overall control of the navigation device is installed in a vehicle interior, and includes an input / output device (not shown), a storage device (ROM, RAM, etc.), a central processing unit (CPU), A timer counter and the like are provided. On the input side of the ECU 1, an input unit 2 for operating the navigation device, a map database 3 storing map information, a GPS (Global Positioning System) receiver 4, a wheel speed sensor, a yaw angle sensor, etc. Various sensors 5 for performing navigation are connected. A liquid crystal display 7 and a speaker 8 provided at the driver's seat are connected to the output side of the ECU 1.
[0013]
In FIG. 1, a processing procedure executed in the ECU 1 is shown. Input information from the input unit 2, map information in the map database 3, information received by the GPS receiver 4, and information from the sensors 5 Information is input to the vehicle position detection unit 11. The vehicle position detection unit 11 determines the vehicle position based on information from the GPS receiver 4 and the sensors 5. When the destination is input by the input unit 2, the guidance route calculation unit 12 searches for the optimum guidance route from the vehicle position to the destination, and the guidance route is stored in the guidance route storage unit 13. The information presentation determination unit 14 creates an image in which the guidance route is superimposed on a map around the vehicle position and displays the image on the display 7, and the image is sequentially changed as the vehicle travels.
[0014]
Further, when the vehicle approaches a guidance point (intersection or Y-junction) to be routed such as a right turn or a left turn on the guidance route, the information presentation determination unit 14 displays the details of the guidance point on the display 7. The direction of travel is displayed by switching to the screen, and the direction of travel is presented by voice guidance from the speaker 8. In the navigation apparatus according to the present embodiment at the time of this route guidance, it is determined whether or not the miscourse determination unit 15 has made a mistake in the course based on the vehicle position and the guidance route, that is, whether or not the course has been changed outside the correct guidance point. If it is determined and the course is missed, the timing for presenting the next and subsequent voice guidance is corrected. Therefore, the voice guidance presentation timing correction process will be described in detail.
[0015]
The ECU 1 executes the presentation timing correction routine shown in FIG. 2 at a predetermined control interval during execution of road guidance. First, in step S2, the ECU 1 determines whether or not it has reached a point where voice guidance should be started in preparation for a course change at the next guidance point. In the navigation device of the present embodiment, 100 m before the next guidance point is defined as the voice guidance start point, and the determination in step S2 is performed based on the vehicle position determined from the information of the GPS receiver 4 and sensors 5. Do. While the determination in step S2 is NO (No), the routine is finished as it is. When the determination is YES (Yes), the routine proceeds to Step S4 where voice guidance is provided for the direction of travel at the guide point (route guidance means). In parallel with the voice guidance, the route guidance is displayed on the display 7 as described above.
[0016]
In a succeeding step S6, it is determined whether or not a mistake has been made (miss course determination means). This determination is performed by comparing the vehicle position and the guidance route described above. If the two match, it is considered that the route guidance has been performed at the correct guidance point, and NO (No) determination is made in step S6. To exit the routine. That is, in this case, since it means that the voice guidance is given to the driver at an appropriate timing, the voice guidance is also given at the same timing at the next guidance point.
[0017]
On the other hand, if the vehicle position and the guidance route do not match, that is, if the course is changed at an incorrect point, it is regarded as a missed course, and a determination of YES is made in step S6 and the process proceeds to step S8. In step S8, it is determined whether or not the route guidance has been performed on the near side of the guidance point (that is, the timing of the route guidance is too early). If YES, the predetermined amount is set in the direction in which the timing of starting the voice guidance is delayed in step S10. The routine is terminated after correcting only (presentation timing correction means).
[0018]
If NO is determined in step S8 that the route guidance is performed on the back side from the guidance point (that is, the route guidance timing is too late), the timing at which the process proceeds to step S12 and voice guidance is started. The routine is terminated after correcting by a predetermined amount in the direction of speeding up (presentation timing correction means). Note that the correction processing in step S10 and step S12 may be performed based on the distance, for example, correcting 100m to 80m, or delaying the timing of shifting from step S2 to step S4 by 2 seconds, etc. May be based on time.
[0019]
With the above processing, when the driver tends to mis-course to the near side from the correct guidance point, the timing of the voice guidance is delayed, and the route guidance is performed on the back side from the next time onward, and conversely the driver If there is a tendency to miss course from the guidance point, the timing of voice guidance will be advanced, and the next route will be routed on the near side, and as a result, the route change will be appropriate in any case. Performed at the presentation timing. Therefore, by repeating this process, the route guidance is always performed at an appropriate guidance point without causing a miscourse regardless of individual differences of drivers, and thus the road guidance is surely performed along the guidance route. be able to.
[0020]
Furthermore, drivers need to pay special attention to pedestrians when turning right or left, but voice guidance is given at the timing appropriate for each driver as described above. Time is significantly reduced, and the burden on the driver can be greatly reduced.
[Second Embodiment]
Next, a second embodiment of a vehicle navigation device embodying the present invention will be described.
[0021]
The overall configuration of the navigation device of the second embodiment is the same as that of the first embodiment, and the difference is in the contents of the presentation timing correction routine executed by the ECU 1. Therefore, the explanation of the common parts is omitted and the differences are emphasized.
FIG. 3 partially shows a presentation timing correction routine executed by the ECU of the present embodiment, and is the same as FIG. 2 except for the display portion. As in the first embodiment, it is determined in step S8 whether or not the route guidance has been made before the guidance point. If YES, the counter C is incremented in step S22, and if NO, the counter C is decremented (miscourse information storage means) ). The counter C is initialized to 0 when the ECU 1 is started. Thereafter, in step S26, the timing correction amount corresponding to the counter C is set from the map of FIG. 4, and the value of the counter C is determined in step S28. When the counter C is 0, the routine is terminated assuming that the voice guidance timing is appropriate. When the counter C is positive, the voice guidance timing is corrected in the direction of delaying based on the timing correction amount in the step S10. When C is negative, the correction is made in the direction to advance the timing on the contrary based on the timing correction amount in step S12.
[0022]
That is, unlike the first embodiment in which the correction direction of the voice guidance timing is determined based only on the previous miscourse, in the present embodiment, the past miscourse occurrence status is reflected in the timing correction. For example, if the driver has a tendency to miscourse to the near side, the timing of voice guidance should be delayed. Since the counter C is added to the positive side based on the miscourse on the side, the timing is corrected in a direction that is surely delayed, thereby preventing the miscourse more accurately as compared with the first embodiment. Can do.
[0023]
In addition, as is clear from FIG. 4, the timing correction amount is set in proportion to the absolute value of the counter C, so that the absolute value of the counter C is large and the driver mistracks either the front side or the back side. The stronger the tendency is, the more the timing correction amount is set to a larger value, and there is an effect that correction can be made promptly at an appropriate timing.
This is the end of the description of the embodiment, but the aspect of the present invention is not limited to this embodiment. For example, the navigation devices of the first and second embodiments have determined the position of the vehicle using information on various sensors for self-contained navigation in addition to GPS information, but the configuration is not limited to this. Instead, for example, the navigation device that determines the position of the vehicle based only on GPS information, or a navigation device that has a function of receiving traffic information from a beacon installed on a road may be used.
[0024]
In the first and second embodiments, the route guidance is instructed by voice guidance. However, the present invention is not limited to this as long as the driver can grasp the route guidance presentation without moving the line of sight. You may make it project a advancing direction on a front window using a head-up display.
Furthermore, in the first embodiment, the voice guidance is corrected when a miscourse occurs and the determination in step S6 is YES. In the second embodiment, the voice guidance is corrected when the counter C is determined to be other than 0 in step S28. For example, in the first embodiment, the voice guidance may be corrected when the miscourse has overlapped a predetermined number of times, and in the second embodiment, when the absolute value of the counter C exceeds a predetermined value. Good.
[0025]
【The invention's effect】
As described above, according to the vehicle navigation device of the first aspect of the present invention, the route guidance is always performed at an appropriate guidance point without being influenced by the individual difference of the driver, and thus, along the guidance route. Road guidance can be performed reliably.
Further, according to the vehicle navigation device of the second aspect of the present invention, it is possible to prevent the miscourse more accurately without being affected by the accidental miscourse.
[0026]
Furthermore, according to the vehicle navigation device of the third aspect of the present invention, it is possible to quickly correct to an appropriate presentation timing.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing a vehicle navigation apparatus according to first and second embodiments.
FIG. 2 is a flowchart showing a presentation timing correction routine executed by the ECU of the first embodiment.
FIG. 3 is a flowchart illustrating a presentation timing correction routine executed by an ECU according to a second embodiment.
FIG. 4 is an explanatory diagram showing a map for setting a timing correction amount.
[Explanation of symbols]
1 ECU (course guidance means, miscourse determination means, presentation timing correction means, miscourse information storage means)
8 Speaker (Course guidance means)

Claims (3)

Vehicle navigation that provides road guidance according to the searched guidance route and presents the route guidance at the guidance point to the driver by the route guidance means when the vehicle approaches the guidance point on the guidance route to be route guidance. In the device
Miscourse judging means for judging whether a course change has been made at a place other than the presented guidance point and the course has been missed on either the near side or the far side from the guidance point ;
If it is determined by the miscourse determination means that the course has been mis-routed to the near side from the guidance point, the presentation timing of the route guidance by the route guidance means is corrected to be delayed, and it is determined that the course has been mis-routed from the guidance point to the back. And a presentation timing correcting means for correcting the direction guidance presentation timing by the course guidance means in a direction to be advanced . Vehicle navigation that provides road guidance according to the searched guidance route and presents the route guidance at the guidance point to the driver by the route guidance means when the vehicle approaches the guidance point on the guidance route to be route guidance. In the device
Miscourse judging means for judging whether a course change has been made at a place other than the presented guidance point and the course has been missed on either the near side or the far side from the guidance point;
Miscourse information accumulating means for accumulating the determination result of the miscourse determining means;
When the number of missed courses accumulated in the missed course information accumulating unit is larger on the near side than on the far side, the course guidance presenting timing by the course guiding unit is corrected so as to be delayed and accumulated in the miscourse information accumulating unit A presentation timing correction means for correcting the direction of presentation of the route guidance by the route guidance means in a direction that is advanced when the number of miss courses is greater on the back side than on the near side;
Car dual-use navigation device you, comprising the. The presentation timing correction means increases the correction amount when correcting the course guidance presentation timing as the difference in the number of miscourses between the near side and the back side accumulated in the miscourse information accumulation means increases. The vehicle navigation apparatus according to claim 2 , wherein the vehicle navigation apparatus is a vehicle navigation apparatus.

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