JP2007218645A - Navigation device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device capable of raising the precision of detection for its own vehicle position by displaying its own vehicle position detected by a position detection section and candidates for the own vehicle position with respect to the detected own vehicle position, and selecting a correct position from the detected own vehicle position and the candidates for the own vehicle position being displayed, and correcting the position detection section automatically. <P>SOLUTION: The own vehicle position detected by the own vehicle position detection section, and the candidates for the own vehicle position calculated by an own vehicle position candidate calculation section are simultaneously displayed on a display section, and the correct position is selected from the displayed detected own vehicle position and candidates for the own vehicle position at an own vehicle position selection section. According to the selection at the own vehicle position selection section, the precision of detection of the own vehicle position detection section is adjusted. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a navigation device for a moving body that detects a current position of a moving body, compares the detected position on road data on a map, and corrects it.

  Conventionally, as a technique for detecting the current position and moving direction of a moving body, a position detecting device that obtains an approximate latitude and longitude by GPS (Global Positioning System) and a sensor that can acquire speed information and azimuth information from the moving body are provided. A sensor unit that calculates the vehicle position from information acquired from the sensor, and a map matching method that corrects the position from which the information is acquired from the detection unit and the sensor unit and compares the map data with the map data to correct the position to road information. Are known. Such a navigation device for a moving body can indicate where the moving body is by determining the position of the vehicle and displaying it on the screen by a map display device.

Such a mobile navigation device may cause an error between the vehicle position detected by the position detection device using GPS and the actual vehicle position, and performs correction using various methods. ing. For example, there is a navigation device that displays a vehicle position detected by a position detection device and a plurality of vehicle position candidates on a display unit on a mobile navigation device and makes a user select and correct the vehicle position to an accurate vehicle position ( For example, reference 1).
In addition, there is a navigation device that calculates an accurate vehicle position by automatically taking into account one-way streets, highway entrances, and the like in order to correct the vehicle position (for example, Reference 2).

Japanese Patent Application Laid-Open No. 07-151556 Japanese Patent Laid-Open No. 11-304512

  However, if the vehicle position and a plurality of vehicle position candidates are displayed and allowed to be selected by the user, the vehicle position and the plurality of vehicle position candidates detected by the position detection device are always displayed and selected by the user. It is necessary to improve the accuracy of the position detection device.

  In addition, when calculating the correct vehicle position in consideration of one-way traffic or the entrance / exit of an expressway to correct the vehicle position, the map data of the navigation device and the actual road shape change. It was difficult to correct correctly.

  Therefore, the present invention displays the own vehicle position detected by the position detection unit and the own vehicle position candidate for the own vehicle position, and the position according to the displayed own vehicle position and the selection from the own vehicle position candidate. An object of the present invention is to provide a navigation device that automatically corrects a detection unit.

In order to solve the above problems, a navigation device for a moving body of the present invention includes a map data storage unit that stores map data including road data, and a vehicle position detection unit that detects a vehicle position, and provides route guidance. A navigation device for a mobile body to perform, a vehicle position candidate calculation unit for calculating a vehicle position candidate of the vehicle position from road data included in the map data, and the vehicle on a map screen showing the map data Based on the display unit that displays the position and the vehicle position candidate at the same time, the vehicle position selection unit that is selected from the vehicle position and the vehicle position candidate displayed on the display unit, and the selection of the vehicle position selection unit And an adjustment unit that adjusts the detection accuracy of the vehicle position detection unit.

  According to the mobile navigation device configured as described above, the vehicle position detected by the vehicle position detection unit and the vehicle position candidate calculated by the vehicle position candidate calculation unit are simultaneously displayed on the display unit. The vehicle position selection unit selects an accurate position from the displayed vehicle position and the vehicle position candidate, and the detection accuracy of the vehicle position detection unit is adjusted according to the selection of the vehicle position selection unit. Can do. For this reason, it is possible to improve the detection accuracy of the vehicle position detection unit and display the correct vehicle position on the display unit without correcting the vehicle position every time. In addition, the display method of the vehicle position candidate displayed on the display unit is not particularly limited. For example, the vehicle position candidate is displayed in a shape different from the vehicle position detected by the vehicle position detection unit, or the color is changed. Can be displayed. In addition, the number of vehicle position candidates displayed is not particularly limited. For example, a plurality of vehicle position candidates are displayed as necessary, such as a road where a plurality of roads intersect or a road with a large number of lanes. can do.

  The vehicle position candidate calculation unit of the mobile navigation apparatus of the present invention may include at least one vehicle position candidate from the map data based on the vehicle position detected by the vehicle position detection unit. The vehicle position candidate is calculated.

  According to the mobile navigation apparatus configured as described above, since at least one or more of the vehicle positions detected by the vehicle position detection unit is calculated, the vehicle position and the vehicle Even if the position candidates are greatly deviated, the detection accuracy of the vehicle position detection unit can be improved.

  Further, the own vehicle position selection unit of the mobile navigation device of the present invention automatically selects the own vehicle position when the own vehicle position displayed on the display unit and the own vehicle position candidate are not selected. It is configured.

  According to the mobile navigation device configured as described above, the vehicle position detected by the vehicle position detection unit is automatically detected when the vehicle position displayed on the display unit and the vehicle position candidate are not selected. Can be selected and displayed on the display unit. In particular, if nothing is selected while the vehicle position and the vehicle position candidate are displayed, the vehicle position detected by the vehicle position detection unit can be automatically determined correctly. Detection accuracy can be corrected.

  Moreover, the display unit of the mobile navigation apparatus of the present invention is configured to display the vehicle position and the vehicle position candidate on the map screen with different shapes and / or colors.

  According to the mobile navigation device configured as described above, when the vehicle position and the vehicle position candidate are displayed on the display unit, the vehicle position and the vehicle position candidate are changed by changing different shapes and colors. It can be easily judged.

  Further, the host vehicle position detection unit of the mobile navigation device of the present invention calculates whether the host vehicle position candidate is calculated by the host vehicle position candidate unit, and selects whether to display the host vehicle position candidate. It is comprised with the part.

  According to the mobile navigation device configured as described above, when the vehicle position is displayed on the display unit, the vehicle selection unit includes a display selection unit that selects whether or not to display the vehicle position candidate. It is possible to select whether or not to correct the vehicle position detected by the vehicle position detection unit by displaying the position candidates on the display unit.

  In the present invention configured as described above, the vehicle position detected by the vehicle position detection unit and the vehicle position candidate calculated by the vehicle position candidate calculation unit are simultaneously displayed on the display unit. The vehicle position selection unit selects an accurate position from the vehicle position and the vehicle position candidate, and the detection accuracy of the vehicle position detection unit can be adjusted according to the selection of the vehicle position selection unit. Without correcting the vehicle position, the detection accuracy of the vehicle position detection unit can be improved and the correct vehicle position can be displayed on the display unit.

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a navigation device for a moving body according to an embodiment of the present invention.

  As shown in FIG. 1, the navigation device N of the present invention includes a GPS 1 that detects a position, a sensor 2 that detects a position based on the inclination and direction of a moving body separately from the GPS 1, and a vehicle position from the GPS 1 and the sensor 2. The vehicle position detection unit 3 to detect, the map data storage unit 4 in which the map data is stored, and the vehicle position to calculate the vehicle position candidate of the vehicle position from the vehicle position detected by the vehicle position detection unit 3 Position candidate calculation unit 5, display unit 6 for displaying map data, own vehicle position, own vehicle position candidate, etc., own vehicle position displayed on display unit 6, own vehicle position selection unit for selecting from own vehicle position candidates 7, an adjustment unit 8 that adjusts the detection accuracy of the vehicle position detection unit 3 based on the selection of the vehicle position selection unit 7, a route guidance unit 9 that sets a destination from the current position and performs route guidance, And a CPU 10 for controlling the navigation device. There.

Here, the sensor 2 can detect the direction and inclination of the moving body from the angle, the angular velocity, and the acceleration.
The own vehicle position detection unit 3 is configured to be able to detect the own vehicle position from the positions detected by the GPS 1 and the sensor 2. By using the vehicle position detected by the vehicle position detection unit 3, the current position and the vehicle position of the map data displayed on the display unit 6 can be displayed. The own vehicle position detection unit 3 is configured to receive an error related to the detection position from the adjustment unit 8 and correct the own vehicle position detected by the own vehicle position detection unit 3 to improve detection accuracy. ing.

  In the map data storage unit 4, the road map is converted into electronic data and stored as map data. In this map data, not only road data but also facility information such as facility data is stored.

  The vehicle position candidate calculation unit 5 searches for roads close to the vehicle position from the road data stored in the map data storage unit 4 with respect to the vehicle position detected by the vehicle position detection unit 3, A location on the road close to the vehicle position is configured as a vehicle position candidate.

  The display unit 6 displays the map data stored in the map data storage unit 4, and the vehicle position detected by the vehicle position detection unit 3 and the vehicle position candidate calculated by the vehicle position candidate calculation unit 5. Can be displayed. In addition, the route guide unit 9 can be used to display road map data and traffic jam information during route guidance. The display method of the display unit 6 is not particularly limited. For example, a plasma display, a liquid crystal display, an LED liquid crystal, an organic EL display, or the like can be used, and the display unit 6 moves by touching the screen of the display unit 6. A touch panel is provided so that an operation of the body navigation device N can be input.

The own vehicle position selection unit 7 accurately determines by the driver from the own vehicle position detected by the own vehicle position detection unit 3 displayed on the display unit 6 and the own vehicle position candidate calculated by the own vehicle position candidate calculation unit 5. The position of the correct vehicle is selected on the touch panel, and the selected position (the own vehicle position or the own vehicle position candidate) is transmitted to the adjustment unit 8 and the own vehicle position on the map displayed on the display unit 6 is accurately determined. Configured to adjust to position.

  The adjustment unit 8 calculates an error between the accurate position on the map transmitted from the vehicle position selection unit 7 and the position detected by the vehicle position detection unit 3, and this error is detected by the vehicle position detection unit 3. The vehicle position detection unit 3 is configured to automatically adjust the detection accuracy of the vehicle position by using the vehicle position correction value. The adjustment unit 8 is provided with a storage unit, and a plurality of errors between the accurate position on the map and the position detected by the vehicle position detection unit 3 are stored, and the vehicle position detection unit 3 detects the error. You may comprise so that accuracy may be improved.

  The route guide unit 9 sets a destination and searches for a route from the current position to the destination, and can display the searched route on the map data of the display unit 6 to perform route guidance. It is configured.

The CPU 10 is configured to control the operation of the navigation device N,
The vehicle position detection unit 3, the map data storage unit 4, the candidate position calculation unit 5, the display unit 6, the vehicle position selection unit 7, the adjustment unit 8, and the route guidance unit 9 are configured to perform control. ing. Further, the CPU 10 includes a display selection unit that calculates the vehicle position candidate in the vehicle position candidate unit 5 and selects whether or not to display the vehicle position candidate on the display unit 6. The selection unit is configured to display and set whether or not to display on the display unit 6.

  Next, the operation of the navigation device of the present invention will be described with reference to the drawings. FIG. 2 is a flowchart showing the operation of the navigation device according to the present invention.

  First, when a key is inserted into a key cylinder of a car and power is supplied to the vehicle (accessory power ON, engine start), power is also supplied to the navigation device N and activation starts. Then, the display unit 6 of the activated navigation device N displays the map data of the current location and the own vehicle position and also displays whether or not the own vehicle position candidate is displayed, and is selected by the driver or user of the car. (S1).

  In S1, if it is selected to display the vehicle position candidate (S1, YES), the navigation device N sets the mode for calculating the vehicle position candidate (S2), and displays the vehicle position candidate after the setting. This is notified to the driver (S3). The notification may be an audio output or may be displayed on the display unit 6.

  In addition, when selecting not to display the own vehicle position candidate (S1, NO) or displaying the selection screen on the display unit 6 but not selecting it, the navigation device N displays the own vehicle position candidate without displaying the own vehicle position candidate. The vehicle position detector 5 detects the vehicle position (S17), and displays a map based on the detected vehicle position (S18). Then, based on whether the power of the navigation device N is OFF or not, when the power is ON (S19, NO), the process returns to S17 to detect the own vehicle position by the own vehicle position detection unit 5, and the detected own vehicle position. The map is displayed based on (S18). If the power is off (S19, NO), the operation of the navigation device N is terminated.

  And after notifying that the own vehicle position candidate is displayed, the navigation device N detects the own vehicle position by the own vehicle position detecting unit 3 (S4). Then, the CPU 10 checks whether or not there is a vehicle position candidate by comparing the detected vehicle position with road data (S5). At this time, if it is determined that there is no own vehicle position candidate (S5, NO), a map display is performed based on the own vehicle position (S15), and the movement of the vehicle is detected and detected by the change of the own vehicle position. The own vehicle position is detected (S4).

  If the vehicle position candidate calculation unit 5 determines that there is a vehicle position candidate in S5 (S5, YES), it is determined whether there are a plurality of vehicle position candidates calculated by the vehicle position candidate calculation unit 5. (S6). At this time, when there are a plurality of vehicle position candidates (S6, YES), it is determined whether or not a plurality of displays are performed on the display unit 6 (S7), and when the CPU 11 determines that a plurality of displays are performed (S7, YES), The own vehicle position detected by the own vehicle position detection unit 3 and a plurality of own vehicle position candidates calculated by the own vehicle position candidate calculation unit 5 are simultaneously displayed on the map of the display unit 6 (S8).

  Here, when there are not a plurality of vehicle position candidates in S6 (S6, NO) or a plurality of vehicle position candidates are not displayed in S7 (S7, NO), the vehicle position and the vehicle candidate detected by the vehicle position detection unit 3 The position is displayed simultaneously (S9).

  Then, after the vehicle position and the vehicle candidate position are displayed simultaneously (S8, S9), it is determined whether or not the driver selects the optimum vehicle position from the displayed vehicle position and the vehicle candidate position ( S10).

  When the driver selects an optimal vehicle position from the vehicle position and the vehicle candidate position displayed on the display unit 6 (S10, YES), the navigation device N changes to the selected vehicle position (S11). . Then, the adjustment unit 8 of the navigation device N calculates an error between the initial vehicle position and the changed vehicle position (S12), and detects the vehicle position detected by the vehicle position detection unit 5 based on the calculated error. The vehicle position is adjusted (S13). When the driver does not select a position (S10, NO), a map is displayed based on the vehicle position detected by the vehicle position detection unit 5 (S16). Then, it is determined whether or not the power of the navigation device N is OFF (S14). When the power is ON (S14, YES), the process returns to S4. Further, when the power is off (S14, NO), the operation of the navigation device N is terminated.

  At this time, it is determined whether or not the navigation device N has been turned off (power is not supplied) (S14), and if it is determined that the power has not been turned off (S14, NO), the process returns to S4 and the vehicle position is repeatedly determined. The process of detecting and calculating whether or not there is a vehicle position candidate for the detected vehicle position is repeated (repetition from S4 to S14). If it is determined that the power is OFF (S14, YES), the operation of the navigation device N is stopped.

  Next, operation | movement of the navigation apparatus N in the state which displays the own vehicle position candidate is demonstrated using drawing. FIG. 3A is a schematic diagram showing a state where the vehicle position is displayed on the map of the display unit, and FIG. 3B shows the vehicle position and the vehicle position candidate on the map of the display unit. FIG. 3C is a schematic diagram showing a state where the vehicle position is displayed on the map after the correct position is selected.

  As shown in FIG. 3A, the map data M displayed on the display unit 6 is displayed on the highway H as the vehicle position J when traveling on the highway H. Then, when the interchange IC from the highway H to the general road I approaches, the vehicle position candidate calculation unit 5 calculates that the interchange IC of the highway IC changes to the general road I, and the highway H It is calculated whether there is a general road I running in parallel.

  At this time, if it is calculated that there is a general road I running parallel after passing the interchange IC, as shown in FIG. 3B, the own vehicle position J (highway) detected by the own vehicle position detecting unit 3 H)) and the vehicle position candidate D calculated by the vehicle position candidate calculation unit 5 are simultaneously displayed on the map data M of the display unit 6.

Then, in the state of FIG. 3 (b), the driver selects the correct own vehicle position, thereby correcting the correct own vehicle position as shown in FIG. 3 (c) and displaying the own vehicle position J. In FIG. 3B, the vehicle position J and the vehicle position candidate D are displayed, and when the correct position is selected, the selected information is transmitted to the adjustment unit 8, and the vehicle position J and the vehicle The error with respect to the position candidate D is calculated, the detection accuracy of detecting the vehicle position by the vehicle position detection unit 3 is corrected, and the detection accuracy of the vehicle position detection unit 3 is improved.

  The navigation device N configured as described above displays a setting screen as to whether or not to display the vehicle position candidate on the display portion 6 of the navigation device N immediately after startup, and the display of the vehicle position candidate is set. When the vehicle position detection unit 5 detects the vehicle position, the vehicle position candidate calculation unit calculates whether or not there is a vehicle position candidate for the vehicle position, and when there is a vehicle position candidate, The detection accuracy of the vehicle position detection unit 5 can be improved by displaying the vehicle position and the vehicle position candidate at the same time and selecting the optimum vehicle position from the display unit 6.

  Further, the present invention is not limited to the embodiment, and the same effect can be obtained even if various changes are made. For example, the vehicle position J and the vehicle position candidate D shown in FIG. 3B may be displayed in different colors. In addition, when the vehicle position candidate exists, the same effect can be obtained by notifying it using voice guidance instead of displaying it on the map of the display unit 6.

  In addition, although the own vehicle position detection unit 3, the own vehicle position candidate calculation unit 5, the adjustment unit 8, the route guidance unit 9 and the like have been individually described, the present invention is not limited thereto, and software configured by a batch program May be processed by the CPU 10.

As described above, the mobile navigation device according to the present invention simultaneously displays the vehicle position detected by the vehicle position detection unit and the vehicle position candidate calculated by the vehicle position candidate calculation unit on the display unit. Then, the vehicle position selection unit selects an accurate position from the displayed vehicle position and the vehicle position candidate, and the detection accuracy of the vehicle position detection unit is adjusted according to the selection of the vehicle position selection unit. Therefore, it is useful as a navigation device for a moving body that can improve the detection accuracy of the vehicle position detection unit and display the correct vehicle position on the display unit without correcting the vehicle position every time. .

The block diagram which shows the structure of the navigation apparatus for mobile bodies in embodiment of this invention The flowchart which shows operation | movement of the navigation apparatus in this invention. (A) Schematic diagram showing a state where the vehicle position is displayed on the map of the display unit (b) Schematic diagram showing a state where the vehicle position and the vehicle position candidate are displayed on the map of the display unit (c) Schematic diagram showing the vehicle position displayed on the map after selecting the correct position

Explanation of symbols

1 ... GPS
2 ... Sensor 3 ... Own vehicle position detection unit 4 ... Map data storage unit 5 ... Own vehicle position candidate calculation unit 6 ... Display unit 7 ... Own vehicle position selection unit 8・ Adjustment unit 9 ... Route guidance unit 10 ... CPU
D: Automobile position candidate H: Expressway I: General road J: Automobile position M: Map data N: Navigation device IC: Interchange

Claims (5)

A map data storage unit for storing map data including road data;
A navigation device for a moving body that includes a host vehicle position detection unit that detects a host vehicle position and performs route guidance,
A vehicle position candidate calculation unit that calculates a vehicle position candidate of the vehicle position from road data included in the map data;
A display unit for simultaneously displaying the vehicle position and the vehicle position candidate on a map screen showing the map data;
A host vehicle position selection unit for selecting from the host vehicle position and the host vehicle position candidate displayed on the display unit;
An adjustment unit that adjusts the detection accuracy of the vehicle position detection unit based on the selection of the vehicle position selection unit;
A navigation device for a moving body, comprising: The vehicle position candidate calculation unit calculates at least one vehicle position candidate from the map data based on the vehicle position detected by the vehicle position detection unit. The navigation device for a moving body according to claim 1, wherein the navigation device is a moving body. The vehicle position selection unit automatically selects the vehicle position when the vehicle position displayed on the display unit and the vehicle position candidate are not selected. The navigation apparatus for moving bodies as described. The said display part displays the said vehicle position and the said vehicle position candidate on the said map screen by a different shape or color, The moving body as described in any one of Claims 1-3 characterized by the above-mentioned. Navigation device. The vehicle position detection unit includes a display selection unit that calculates whether the vehicle position candidate is calculated by the vehicle position candidate unit and whether to display the vehicle position candidate. The navigation apparatus for moving bodies according to any one of claims 1 to 4.

Images