JPH10300496A - Navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation system capable of optimizing, using simple constitution, a searched route according to the driving technique of the driver in setting the route automatically. SOLUTION: A navigation system includes a map information storage medium 8 storing map information, a memory 11A having the question data required to judge the technique of the driver, a display device 9 for displaying the question data read from the memory 11A on a screen, an input means 6 for inputting the answers to the question data displayed on the screen, a central processing unit 2 calculating data about the driver's technique from the data input, and a nonvolatile memory 10 storing the calculation results; the central processing unit 2 automatically sets the route reflecting the driver's technique using the driver's technique data stored in the nonvolatile memory 10 and the map data read from the map information storage medium 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device, and more particularly to an improved navigation device having a function of automatically setting a traveling route by inputting a departure place and a destination on a map displayed on a display device. About.

[0002]

2. Description of the Related Art The present location is determined by using radio waves from a plurality of satellites, map data is read from a map information storage medium such as a CD-ROM, a map is displayed on a display device, and route guidance to a destination is performed. In-vehicle navigation devices that can be utilized are rapidly spreading.

[0003] Such a navigation device is configured, for example, as shown in FIG. The navigation apparatus 1 includes, for example, a central processing unit (CPU) 2 that incorporates a predetermined program and operates under program control, and a GPS receiver 3 that receives radio waves from a plurality of GPS satellites and outputs positioning data of the current location. And an orientation sensor 4 for measuring the orientation, a travel distance sensor 5 for measuring the travel distance from the departure place, an input device 6 for inputting data such as a departure place and a destination by a keyboard operation, etc., and map data are stored. A reader 7 for reading map data from a read map information storage medium 8 such as a CD-ROM, a CRT or a liquid crystal display for displaying the map data read from the map information storage medium 8 by the reader 7 as an image. The display device 9 and the guidance route calculated by the CPU 2 based on the map data read from the map information storage medium 8 The non-volatile memory 10 of large capacity such as flash memory for storing various information, and a memory 11 for storing at least a program.

By the way, the map data stored in the map information storage medium 8 includes road network data connecting path points called nodes (nodes) such as intersections, branch points, and inflection points with straight lines called links. The guidance route is set based on the road network data. Therefore, the guide route is basically a point on the road network, but it is also possible to set a route point at a point outside the road network according to the user's preference.

[0005] The navigation device 1 operates, for example, as follows. First, when CPU 2 is started, CP
U2 operates based on a program stored in the memory 11. Then, map data necessary for displaying the current position of the vehicle is read from the map information storage medium 8 by the reader 7 and displayed on the display device 9 as an image. on the other hand,
The current position coordinates of the own vehicle are determined from the absolute position measurement data from the GPS receiver 2 or the position information from the direction sensor 4 and the movement amount sensor 5, and are overwritten and displayed on the map displayed on the display device 9 by the CPU 2. You. The position of the vehicle on the map is moved and displayed as the vehicle moves. Therefore, the current position of the own vehicle can be easily confirmed on the map.

[0006]

Prior to using the navigation device 1, the shortest route from the departure place (usually, the current position of the vehicle) to the destination is set. For example, as shown in FIG. 7, on the screen (map) 12 displayed on the display device 9, the shortest route from the starting point P to the destination Q is set as follows. First, when the departure point P and the destination Q are set using the input device 6, the CPU 2 reads the node and link information existing between the departure point P and the destination Q from the map information storage medium 8, and departs. A route with the shortest distance between the place P and the destination Q is automatically searched, and for example, a search route indicated by a dotted line on the screen is displayed as a recommended route IRC. This recommended route IR
If C is acceptable, this is set as the guidance route.

[0007] When the recommended route IRC is set as the guidance route in this manner, the own vehicle may travel in accordance with the guidance route IRC displayed on the display device 9 and surely travels to the destination Q in the shortest distance. It becomes possible.

However, this navigation device 1
When searching for a route, it is necessary to simply search for the shortest route or a wide road, or to search for a route by weighting expressways, motorways, national roads, prefectural roads, and municipal roads. , Is set irrespective of the driving skill of the driver. For example, when the driving skill of the driver is an elementary level, there are many people who are not good at crossing an oncoming vehicle, turning right, traveling on a road with many lanes, and the like. Such conditions are not reflected.

That is, the recommended route IRC is based on the departure point P
From the road R1, turn left at the intersection N1 into the narrow road R3, turn left at the intersection N4 into the wide road (one-lane two-lane) R4, turn right at the next intersection N5 and narrow the road Enter road R6 and follow the road. Turn right at intersection N8 to narrow road R7. Turn left at next intersection N9 and enter road R2.
It leads to.

However, the recommended route IRC is
Roads R3, R6, and R7 have narrow road widths, and there are places where it is difficult to get on and off. On road R4, traffic is extremely large and it is difficult to make a right turn. In spite of the difficult guidance route, the route is set as a recommended route, and there is a problem that a route cannot be set according to the driving skill of the driver.

Therefore, an object of the present invention is to provide a navigation device which can optimize a search route according to a driving skill of a driver with a simple configuration at the time of automatic route setting. .

[0012]

Accordingly, in order to achieve the above-mentioned object, the present invention comprises a map information storage medium for storing map information and question data necessary for judging a driver's skill. Memory, a display device for displaying the question data read from the memory on the screen, input means for inputting the answer of the question data displayed on the screen, and a central processing unit for calculating the skill data of the driver from the input data. A nonvolatile memory for storing calculation results, wherein the central processing unit reflects the skill of the driver using the driver skill data stored in the nonvolatile memory and the map data read from the map information storage medium. It is characterized in that a route is automatically set.

According to a second aspect of the present invention, there is provided a map information storage medium for storing map information, a display device for displaying map data read from the map information storage medium on a screen,
A current position measuring means for measuring a current position, an input means for inputting a departure place, a destination, etc., a non-volatile memory for storing various information, a memory for storing at least a program, and a central processing unit for connecting these. The map data read from the map information storage medium is displayed on a screen of a display device, and by inputting the departure place and the destination on the map, a travel route from the departure place to the destination is automatically set. A navigation device that overwrites and displays the current position coordinates of the own vehicle determined by the current position positioning means on the map, and the memory includes question data necessary for determining the skill of the driver, The aggregation result of the question data is used as driver skill data for route setting, and a route is set according to the skill of the driver.

Further, according to a third aspect of the present invention, the central processing unit sequentially displays the question data read from the memory on a screen of the display device, and tallies the answers of the question data input from the input means. The driver's skill parameter is determined based on the driver skill reference data stored in the memory, and the result is stored in a non-volatile memory. When the route is set, the route is set with reference to the driver skill parameter. It operates as follows.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a navigation device according to the present invention will be described with reference to FIGS. Note that the same parts as those of the conventional example shown in FIG. 8 are denoted by the same reference numerals, and detailed description thereof will be omitted. This embodiment is characterized in that the memory 11A is provided with question data necessary for determining the skill of the driver, and that the memory 11A
The question data read from A is displayed on the display device 9 on the screen, and the answer of the question data is input by the input means 6, and the skill data of the driver is calculated by the central processing unit (CPU) 2 based on this data. And storing the calculation result in a nonvolatile memory.

In particular, the question data stored in the memory 11A is sequentially displayed on the screen 12 of the display device 9 as shown in FIG.
The answer is input to the CPU 2 by using. For example, question 1
Then, "How many years have you been driving for the first time?"
For "less than 1 year, 1 year or more, less than 5 years, 5 years or more"
Are easy to answer, 1 point, 2 points,
Three points are assigned, and the answer is input to the CPU 2 using the input device 6.

According to the navigation system 1A, when searching for a guidance route, the driver skill parameter stored in the non-volatile memory 10 is referred to, so that a search route corresponding to the driver's driving skill is obtained. Can be created.

Prior to the search for the guidance route, a process of determining the skill of the driver is performed. This determination process is performed, for example, as shown in FIG. First, in step S1, the memory 1
The question data is read from 1A, and the first question for the driver is displayed on the display device 9. In step S2, the system waits for the answer to this question to be input from the input means 6, and gives the input answer a rating of, for example, two steps (Yes, No) or three steps (Yes, Neither, No). Score. For example, the question displayed on the display device 9 is “Do you have a mistake with oncoming vehicles?
? ", Here, a request with a three-level rating of" yes "," neither ", or" no "is requested, one point is given for" yes ", and two points for" neither ". Points are assigned, and "No" is assigned three points. And
After the point corresponding to the answer is stored in the non-volatile memory 10, the process proceeds to the next question, and thereafter, the answer is scored and stored in the non-volatile memory 10.

Next, in step S3, it is determined whether or not the questions have been completed for the prepared predetermined number of questions. When all questions have been completed, the process proceeds to step S4. If all the questions have not been answered, the process returns to step S1, and the operations of steps S1 and S2 are repeated. In step S4, the evaluation points stored in the non-volatile memory 10 are read, and the CPU 2 calculates the total points.
Proceed to step S5. In step S5, the total score of the evaluation points is compared with a driver skill reference point stored in the memory 11A and serving as a criterion for determining the driver skill, and a driver skill parameter is determined. The driver skill threshold is set, for example, as follows, and is determined with reference to the threshold.

Elementary (parameter 1) <10 points 10 points ≦ intermediate (parameter 2) <20 points 20 points ≦ advanced (parameter 3) If the total score of the evaluation points is less than 10 in step S5, the driving skill is The process is classified as elementary and proceeds to step S6. If the total score of the evaluation points is 10 or more and less than 20, the driving skill is classified as intermediate, and the process proceeds to step S7. Further, if the total score of the evaluation points is 20 or more, the driving skill is classified as advanced, and the process proceeds to step S8.
Then, the corresponding driver skill parameters 1,
A few are determined. The determined driver skill parameters are stored in the non-volatile memory 10 in step S9.
For example, if the driving skill is elementary, the parameter is 1
If the driving skill is intermediate, the parameter 2 is
When the driving skill is advanced, the parameter 3 is stored in the non-volatile memory 10 and the determination process ends.

Next, the creation of a driver skill table referred to in the automatic route search will be described with reference to FIG. First, in step SA1, a driver skill parameter stored in the nonvolatile memory 10 is determined. Memory 11A
Stores the data items to be reflected in the automatic route search, and the respective parameters are set in the table according to the determination in this step. As items in the table, items weighted according to the driver's skill are set. For example, when the driver's skill parameter is elementary (set value is 1), for example, the number of intersection right turns,
Items such as the width of the traffic road, the number of traffic road lanes, the speed limit, and the merging method are set in the table. Therefore, in the case of a beginner, it is suitable to reduce the number of right turns at an intersection as much as possible and to recommend a route having a wide road width and a low traveling speed. Therefore, a value corresponding to this is set. On the other hand, intermediate / advanced users set these set values so as not to be easily reflected in the result of the route search. And step S
In A2, the parameters for beginners are set in the table, the parameters for intermediate users are set in step SA3, and the parameters for advanced users are set in the table in step SA4.

Next, a method of setting a guidance route for a beginner having a driving skill by the navigation device 1A will be described with reference to FIG. First, as shown in the figure, the departure point P and the destination Q are appropriately scrolled while looking at the screen 12 displayed on the display device 9, or are searched by the place name or telephone number of the service information. And set. Then, the CPU 2 reads from the map information storage medium 8 road network data connecting a route point called a node existing between the set departure point P and the set destination Q and a straight route called a link, and the route search is performed. Be started. In this search, when a route is selected based on the above-mentioned data, whether the route is the shortest route, a wide road, or a highway, a motorway, a national road, a prefectural road, a municipal road, etc. The table in which the driver skill parameters are set is referred to. That is, in the case of a beginner, the number of right turns at an intersection is reduced as much as possible, and a route having a wide road width and a low traveling speed is preferentially recommended. Therefore, as a result of the automatic route search, the recommended route IRA indicated by the dotted line in FIG. This recommended route IRA passes from the departure point P through the road R1,
At the intersection N2, turn left to enter the wide road R2. At the intersection N3, turn left to reach the destination Q via the intersection N9. There is no right turn at the intersection, and the driving skills of beginners such as wide roads Is reflected.

The recommended route IRB shown in FIG. 6 is for an intermediate driver. This recommended route IRB
From the departure point P through the road R1, turn left at the intersection N1 into the narrow road R3, turn left at the intersection N4 into the wide road (one-sided two-lane) R4, turn right at the intersection N6 The user enters the road R5 having the same road width, turns right at the next intersection N7, enters the road R2 having a narrower road width than the road R5, and soon reaches the destination Q. This recommended route IR
B is a relation in which a route search is performed with reference to the data table of intermediate driving skills, and the number of right turns is increased compared to the recommended route IRA shown in FIG. 5, and the traffic on narrow roads is incorporated. It is devised to reach the destination Q at a shorter distance than the recommended route IRA.

Further, the recommended route IRC shown in FIG.
From the starting point P, pass the road R1, turn left at the intersection N1 into the narrow road R3, turn left at the intersection N4 into the wide road R4, turn right at the next intersection N5 and narrow the road again. Enter R6, follow the road, turn right at intersection N8, and narrow road R7 like road R6.
Then, turn left at the next intersection N9 and enter the road R2. This recommended route IR
C is searched for a route by referring to the data table of advanced driving skills. Items such as the number of right turns at intersections for beginners and intermediates, the width of traffic roads, the number of traffic lanes, the speed limit, and the merging method are included. It has been removed from the table or has been greatly restricted, and the shortest search route, the minimization of the cost required for movement (cost), etc., are preferentially referenced.

The present invention is not limited to the above-described embodiment.
In addition to the PS receiver, the self-contained navigation direction sensor, and the movement amount sensor, it is also possible to adopt a configuration in which both navigation methods are used together.

[0026]

As described above, according to the present invention, the data table corresponding to the driving skill of the driver is prepared by using the question data stored in the memory and necessary for determining the skill of the driver. It can be created and stored in non-volatile memory. Therefore, by referring to this data table at the time of the route search processing, it is possible to select an appropriate recommended route according to the driving skill of the driver.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a navigation device according to the present invention.

FIG. 2 is a diagram showing a state where question data is displayed on a display device.

FIG. 3 is a flowchart illustrating a process of determining a driver skill.

FIG. 4 is a flowchart for creating a driver skill table.

FIG. 5 is a diagram showing a route search result for a beginner with a driving skill.

FIG. 6 is a diagram showing a result of a route search for an intermediate person having a driving skill.

FIG. 7 is a diagram showing a result of a route search for an advanced driving skill.

FIG. 8 is a block diagram of a conventional navigation device.

[Explanation of symbols]

 Reference Signs List 1A Navigation device 2 Central processing unit (CPU) 3 GPS receiver 4 Orientation sensor 5 Movement sensor 6 Input device 7 Reader 8 Map information storage medium 9 Display device 10 Non-volatile memory 11A Memory P Departure place Q Destination

Claims (3)

[Claims] 1. A map information storage medium for storing map information, a memory having question data necessary for judging a skill of a driver, a display device for displaying question data read from the memory on a screen, and a screen Input means for inputting the answer of the displayed question data, a central processing unit for calculating the skill data of the driver from the input data, and a non-volatile memory for storing the calculation result, wherein the central processing unit A navigation device that automatically sets a route that reflects a driver's skill using driver skill data stored in a non-volatile memory and map data read from a map information storage medium. 2. A map information storage medium for storing map information, a display device for displaying map data read from the map information storage medium on a screen, a current position positioning means for positioning a current position, a departure place, a destination, and the like. Input means, a non-volatile memory for storing various information, a memory for storing at least a program, and a central processing unit for connecting these, and the map data read from the map information storage medium is displayed on a display device on a screen. By displaying and entering the departure point and destination on this map, the travel route from the departure point to the destination is automatically set, and the current position of the vehicle determined by the current position positioning means is displayed on this map. A navigation device for overwriting and displaying position coordinates,
The memory is provided with question data necessary for judging the skill of the driver, and a result of the question data is used as driver skill data for route setting to set a route according to the skill of the driver. A navigation device characterized by the above-mentioned. 3. The central processing unit sequentially displays the question data read from the memory on a display device, sums up the answers of the question data input from the input means, and stores the count result in the memory. A driver skill parameter is determined in accordance with the driver skill reference data that is present and stored in a non-volatile memory, and when the route is set, an operation is performed such that the route is set with reference to the driver skill parameter. The navigation device according to claim 2.