JP2003302238A - Navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately display the position of a driver's own car on a map screen, even in a confusing case such as the case where a highway and a general road are close and parallel or the case where a car enters a parking garage. <P>SOLUTION: This navigation device is provided with a button 20 for selecting a priority road and a map matching free select button 30, whereby when the button 20 is selected, a priority road is selected with reference to the speed of the own car or the information on the toll gate, or forcibly the highway or general road is selected, and when the button 30 is selected, the calculated position of the own car is displayed as it is on the map screen, without map matching processing near the place of the icon selected from a plurality of icons. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted navigation device, and more particularly to a navigation device having a map matching correction function.

[0002]

2. Description of the Related Art A conventional navigation device detects the number of rotations of wheels and the traveling direction of a vehicle by a sensor, collects information from a satellite to measure the current position of the vehicle, and also a map around the position of the vehicle. The data is read from a DVD-ROM or the like, and the road on the map and the position of the vehicle are superimposed and displayed on the display.
In addition, when the user inputs the destination, waypoints, etc., the route that is judged to be the most appropriate from the current location is searched and displayed on the map, and at the intersection an enlarged view etc. is displayed to guide the driver securely. It also has a function to do. Further, not only the guide information is displayed on the display, but also a function of guiding by voice is provided.

However, it has been found that such a map matching method has some problems. The first is that, for example, when a highway and a general road are installed very close to each other and parallel to each other, it is possible to accurately determine which road the vehicle is traveling if the map matching is not performed accurately. Therefore, it is often the case that highways and ordinary roads cannot be distinguished. FIG. 3 is a display screen showing the situation, where 10 is a car, 11 is a general road, and 1 is a road.
2 indicates an expressway. In the figure, the car is displayed as if it were running on a general road, but if the roads are very close to each other, this may be displayed even though they are running on a highway. Also, when a car descends from a highway to a general road, if the vehicle's position is located between the highway and the general road, it may still be displayed as if the vehicle is still traveling on the highway. Many.

The second problem is that when a driver tries to enter a place such as a parking lot that is not included in the map information, it is displayed as if he or she is driving on a road in the vicinity of the map, which causes confusion to the driver. is there. FIG. 4 is a display screen showing this situation. The car 10 is about to enter the parking lot 15 from the road 13, but there is a road 14 in front of the parking lot. In this case, the vehicle 10 should be displayed as if it were entering the parking lot 15 as shown in FIG. 5, but it is displayed as if traveling on the road 14 as shown in FIG. Not a little to give.

[0005]

The problem to be solved by the present invention is to travel on a route with confusing road conditions as described above,
If you are driving in a place or premises that is not in the map information,
An object of the present invention is to provide a vehicle-mounted navigation device that can be corrected by the user without performing normal map matching processing.

[0006]

In order to achieve this object, the present invention provides a setting screen for the user to correct the vehicle position, on which the user selects the priority road. In addition to the first area and the second area for performing map matching free selection that does not perform map matching in a specific place, the vehicle position is displayed on the map according to the selection of the area. There is one characteristic.

Another feature is that when the above-mentioned first area is selected, either the general road or the highway is selected according to the traveling speed of the vehicle and the vehicle position is displayed on the map. There is.

Further, according to the present invention, when the first area is selected, a transition is made to the next screen, and the transitioned screen has an area for the user to select a highway or a general road, and the selected area is selected. Another feature is that the vehicle position is displayed by performing map matching on the road.

Another feature of the present invention is that when the second area is selected, a transition is made to the next screen, and an area in which a place where map matching is not performed can be selected is displayed on the transitioned screen. There is. Further, the present invention has another feature in that an icon string indicating a plurality of places is displayed on the above-mentioned transition screen and map matching is not performed in the vicinity of the icon selected by the user.

Other features of the present invention will become more apparent from the following description of the embodiments.

[0011]

FIG. 2 is a block diagram showing the configuration of an embodiment of a navigation device according to the present invention. The present apparatus includes an arithmetic processing unit 110, an external storage device 120, a sensor unit 130, a display unit 140, a GPS receiving device 151, a voice input / output device 162, and the like. The arithmetic processing unit 110 includes a CPU (Central Processing Unit) 111,
ROM (Read Only Memory) 112, RAM (Random A
ccess Memory) 113 and DMA (Direct Memory Acce
ss) 114. The CPU 111 is used to execute various programs in addition to executing the programs described below. For example, the sensor unit 130 and GPS (Global Posit
based on the information from the ioning system) 151, the current position of the mobile body equipped with this navigation device is calculated. Then, the map information necessary for display is read from the calculated current position information from the database unit 120 and displayed on the display unit 140 together with the current position. In addition, the input device 161
A point specified by the user, for example, an optimum road connecting the current position and the destination is calculated, output to the voice input / output device 162 and the display unit 140, and shown to the user to guide the optimum route. . The ROM 112 stores programs and data described later, and may be an EPROM or the like. The RAM 113 is used to store map information and calculation data. The DMA 114 is used for high-speed data transfer between memories or between a memory and a display device. External storage device 120
Is a read-only DVD-ROM that stores map data.
A DVD-ROM drive 121 for reading necessary data from the ROM disk 123 and an HD drive 122 including a hard disk capable of writing and reading map data are provided. Of course, the external storage device 120 may be a large-capacity storage medium, and may be an IC card or another storage device. The sensor unit 130 is the azimuth sensor 1
31, a gyro 132, and a wheel speed sensor 133 are included. The wheel speed sensor 133 detects the traveling distance of the moving body by counting the pulse signal output with the rotation of the wheel by the counter 135. This mileage signal is for bus 1
It is sent to the arithmetic processing unit 110 via 70. The azimuth sensor 131 detects the magnetic field held by the earth and detects the direction in which the moving body is facing. The gyro 132 includes types such as an optical fiber gyro and a vibrating gyro, and detects the angle at which the moving body rotates. The detection signals of the azimuth sensor 131 and the gyro 132 are converted into digital signals by an analog-digital converter (AD converter) 134 and then sent to the arithmetic processing unit 110. On the other hand, G
The PS receiver 151 receives a signal from a GPS satellite and measures the distance between the mobile body and the satellite and the rate of change of the distance to measure the current position, traveling direction and traveling direction of the mobile body. Further, it is provided with a beacon transmitter that emits traffic information such as road congestion information, regulation information such as construction and traffic closure, and traffic information such as parking lot information, and a traffic information receiving device 152 that receives a signal sent from FM multiplex broadcasting. Further, the in-vehicle LAN device 153 is provided for receiving various kinds of information on the vehicle, for example, door opening / closing information, the type and status of the lights that are lit, the status of the engine, the failure diagnosis result, and the like. Devices 151 to 1
The information at 53 is coupled to the bus 170 via the SCI 154 for converting the serial signal into a parallel signal synchronized with the bus 170. The display unit 140 is a bus 170.
A graphic controller 143 that controls the entire display unit based on control data sent from the arithmetic processing unit 110 via a buffer, a buffer memory 144 that temporarily stores the display data, and image data output from the controller 143. A display control device 141 for controlling display of a display 142 such as a liquid crystal panel or a CRT is provided. The voice input / output device 162 converts the message to the user generated by the arithmetic processing unit 110 into a voice signal and outputs the voice signal, and recognizes the voice uttered by the user to output the voice signal.
The process of transferring to 10 is performed. The input device 161 is a device that receives an instruction from a user, and includes a hard switch, a joystick, a touch panel, and the like. The input / output devices 162 and 161 are coupled to the bus via a PIO 163 that puts a signal on the bus 170 in synchronization with the parallel signal.

The configuration of the navigation device described above is merely an example, and it goes without saying that changes may be made depending on the purpose and application.

Next, an embodiment of a processing flow for correcting the map matching will be described. FIGS. 1, 12, and 13 are flowcharts, and FIGS. 7 to 11 show transitions of display screens according to the flow process. First, two setting menus as shown in FIG. 7 are prepared for correction. 20 is a button for setting a road to be prioritized, and 30 is a button for selecting to display the position of the vehicle obtained by calculation without map matching as it is.

When the button 20 is pressed, the screen transitions as shown in FIG. 8 and, in this embodiment, three options are presented. The first is to give priority to the guide route if there is one, the second is to select matching according to the speed of the vehicle, and the third is a selection branch for forcibly matching a highway or a general road depending on the driver's intention. Is.

When the button 23 is pressed, the screen transitions as shown in FIG. 9, and by selecting either the button 23A or the button 23B, it is selected whether to match the expressway or the general road. It

When the button 22 is pressed, the screen transitions as shown in FIG. 10 and the selection is made to match the highway when the speed is higher than the desired speed set by the user.

On the other hand, returning to the first screen (FIG. 7), when the map matching free selection button 30 in the setting menu is pressed, the screen transitions to the screen illustrated in FIG.

The screen of FIG. 11 includes display areas 31 and 32, and an example of an icon indicating a place is displayed on 32. For example, an icon P indicating a parking lot, an icon GS indicating a gas station, and the like. In the area 31, a message indicating that map matching will not be performed near the icon selected from the icon row below is displayed. Instead of this message, or together with this message, voice guidance can be provided. FIG. 1 shows an embodiment of the processing flow of the present invention in which the map matching free function as described above is added. First, in step S101, the current own vehicle position is calculated, and then in step S
It is determined whether the vehicle position calculated in 102 is off the road. If not, display the own vehicle mark at the calculated own vehicle position as it is (S
109) The process ends.

If the result of determination in step S102 is that the vehicle is off the road, the flow proceeds to step S103, and it is determined whether or not there is a designated icon within a predetermined range. Figure 11
If the icon of the area 32 is selected on the matching free menu screen of No. 3, the determination is made in step S103. When the own vehicle is near the designated icon, the process proceeds to step S109, the own vehicle mark is displayed as it is, and the map matching is not performed.

Further, the determination result of step S103 is NO.
In the case of (negative), the process proceeds to step S104, and it is determined whether or not the guide route is prioritized. When the button 21 on the screen of FIG. 8 is turned on, when there is a guide route, the process of giving priority to that route is performed. Therefore, step S10
If the determination result of 4 is YES (affirmative), step S10
In step 6, the host vehicle position is corrected to the closest position on the guide route, and the host vehicle mark is displayed at that position (S109).

When the guidance route is not prioritized, the process further proceeds to step S105, and it is determined whether or not the priority road is set. The button in Figure 9 is pressed, and the highway 23
If either A or the general road 23B is selected, the determination in step S105 is YES (affirmative),
The host vehicle position is corrected to the nearest position on the selected road (S108), and the host vehicle mark is displayed at that position (S108).
109).

Each of the above steps S103, S104, S
If the determinations in 105 are all NO (negative), the process proceeds to the next step S107, and the vehicle position is corrected by a map matching process different from the conventional one. An example of the flow of this processing is shown in FIG.

In FIG. 12, the type of road on which the vehicle is traveling is determined in step S201. If the vehicle is traveling on a highway, the process proceeds to the highway matching process of step S208. Details of this process are shown in FIG. On the other hand, if the road on which the vehicle is traveling is an ordinary road, the process proceeds to step S202, and it is determined whether or not the expressways are running in parallel. If the vehicles are not running side by side, the problem described with reference to FIG. 3 does not occur, so the vehicle position is corrected as it is to the nearest position on the general road (S206), and the process ends.

If the highways run in parallel, step S2
At 03, it is determined whether the vehicle has passed the vicinity of the entrance of the expressway. If it has not passed, it means that the vehicle is traveling on an ordinary road, so the routine proceeds to step S206. On the other hand, if the vehicle has passed near the entrance of the expressway, it is determined in step S204 whether or not the speed of the vehicle is equal to or higher than the speed set on the screen of FIG. If it is equal to or higher than the set speed, the process proceeds to step S207, and the position is corrected to the nearest position on the expressway.

If the vehicle is traveling at a speed lower than the speed set on the screen of FIG. 10, it is next determined in step S205 whether or not the vehicle has stopped at the tollgate. If the determination result is YES (affirmative), the vehicle position is corrected to the closest position on the expressway (S207).

If it is determined that the vehicle has passed the vicinity of the entrance of the expressway but the speed does not satisfy the set conditions and that the vehicle has stopped at the tollgate, it is determined that the vehicle is still traveling on the general road In S206, the vehicle position is corrected to the nearest position on the general road.

Next, an example of the expressway matching process in step S208 will be described with reference to FIG. First, in step S301, it is determined whether or not the highway runs parallel to the ordinary road. If not running, the vehicle position is corrected to the nearest position on the highway (S305).

If the decision result in the step S301 is YES (affirmative), it is then decided in a step S302 whether or not the vehicle has passed near the exit of the highway. If it has not passed, it is determined that the vehicle is traveling on a highway and the above step S is performed.
The process of 305 is performed.

When it is determined that the vehicle has passed the vicinity of the exit, the process proceeds to step S303, and it is determined whether or not the speed of the vehicle is equal to or higher than the set speed displayed on the screen of FIG. If the speed is equal to or higher than the set speed, it is determined that the vehicle is still near the exit of the expressway but has not passed the exit, and is corrected to the nearest position on the expressway (S305).

On the other hand, when the speed of the own vehicle has not reached the set speed, it is judged that the vehicle has passed through the highway exit and got off the general road, and in the next step S304, the own vehicle position is set to the nearest position on the general road. to correct.

[0031]

As described above, the navigation device according to the present invention is an option for forcibly matching one of the two depending on the driver's intention when it is confusing, such as when a highway and a general road run in parallel and in close proximity. With the option of matching using information on the characteristics of highways, such as traveling speed and passage through toll gates, the vehicle position can be displayed more accurately than before.

Further, since the place where the user does not want to perform the map matching process can be arbitrarily set, there is an effect that the own vehicle position can be accurately displayed even when entering a place not shown on the map such as a parking lot.

[Brief description of drawings]

FIG. 1 is a flowchart showing a process of an embodiment of the present invention.

FIG. 2 is a block diagram showing an example of the overall configuration of the device of the present invention.

FIG. 3 is an explanatory diagram illustrating an example of a case where display becomes confusing.

FIG. 4 is an explanatory diagram illustrating an example of a case where display becomes confusing.

FIG. 5 is an explanatory diagram illustrating an example of a case where display becomes confusing.

FIG. 6 is an explanatory diagram illustrating an example of a case where display becomes confusing.

FIG. 7 is an explanatory diagram showing an example of a setting menu screen of the present invention.

FIG. 8 is an explanatory diagram showing an example of a screen when selecting a method for correcting a vehicle position according to the present invention.

FIG. 9 is an explanatory diagram showing an example of a screen when selecting an expressway or a general road according to the present invention.

FIG. 10 is an explanatory diagram showing an example of a screen when a speed is set as a correction condition according to the present invention.

FIG. 11 is an explanatory diagram showing an example of a screen when selecting not to perform map matching processing according to the present invention.

FIG. 12 is a flowchart showing an example of a new map matching own vehicle position correction process in FIG.

13 is a flowchart showing an embodiment of the expressway matching process in FIG.

[Explanation of symbols]

110: arithmetic processing unit 120: External storage device 130: Sensor part 140: Display

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2C032 HB22 HB23 HB24 HC08 HC13                       HC31 HD03 HD30                 2F029 AA02 AB01 AB07 AB09 AC01                       AC02 AC04 AC18 AD01                 5H180 AA01 BB13 FF04 FF05 FF07                       FF22 FF25 FF27 FF32

Claims (10)

[Claims] 1. In a navigation device in which a vehicle position is calculated based on information obtained from a sensor or the like, map matching processing is performed, and the vehicle position is displayed on a map screen, A navigation device characterized in that a method or condition for correcting a position can be set or selected. 2. The navigation device according to claim 1, wherein map matching processing is not performed at a place designated by the user. 3. The navigation device according to claim 1, wherein the user is forced to set or select a road type for map matching. 4. A navigation device in which a vehicle position is calculated based on information obtained from a sensor or the like, and a map matching process is performed to display the vehicle position on a map screen. A setting screen for correcting the position is prepared, and on the setting screen, a first area for the user to set a priority road and a second area for performing map matching free selection that does not perform map matching at a specific place Navigation device including a region of. 5. A vehicle according to claim 4, wherein when the first area is selected, a plurality of menus for setting a priority road are presented, and the menu indicates whether the road is a general road or a highway depending on the traveling speed of the vehicle. A navigation device including an item for displaying the position of the vehicle on the map according to the determination. 6. The method according to claim 4, wherein a plurality of menus for setting a priority road are presented when the first area is selected, and the menu includes an item for forcibly selecting a road for map matching. A navigation device characterized by being included. 7. The method according to claim 6, wherein when the above item is selected, a transition is made to the next screen, and the transitioned screen has an area for the user to select either a highway or a general road, which is selected. A navigation device characterized by forcibly matching the road and displaying the position of the vehicle. 8. The navigation device according to claim 4, wherein when the second area is selected, a transition is made to the next screen, and the transitioned screen has an area in which a place where map matching is not performed can be selected. 9. The navigation device according to claim 8, wherein an icon row indicating a plurality of locations is displayed on the transitioned screen, and map matching is not performed in the vicinity of the icon selected by the user. 10. A navigation device in which a vehicle position is calculated based on information obtained from a sensor or the like, and a map matching process is performed to display the vehicle position on a map screen. A setting screen for correcting the position is prepared. On the setting screen, an area where it can be set to display the vehicle position calculated without map matching processing on the map screen, highway and general road If there is a road or condition that should be prioritized from a plurality of options including, and if there is any of the above settings, the vehicle position is corrected according to the settings in preference to the map matching process. A navigation device characterized by displaying.