JPH02205712A - Navigation apparatus - Google Patents

Abstract

PURPOSE:To make it possible to provide arriving position data after the specified time has elapsed for users in real time by obtaining the estimated arriving position after the specified time has elapsed together with the average speed within a specified past time. CONSTITUTION:When a user sets a destination with an input device 14, the shortest running path to the destination is set. Then the map around the present position, a position 40 of the user's vehicle and the shortest running path 41 are displayed. When the vehicle starts running, the present position is updated, and the sequential vehicle speed is stored. Namely a CPU 10 computes the average speed based on the distance covered by the vehicle from the present time to the past specified time, and the result is stored. Then whether the user has selected a mode or not is judged. When the mode is selected, interruption is performed. Meanwhile, when the mode is not selected, whether the vehicle has reached the destination or not is judged. When the judgement is negative, steps are returned, and the present position is updated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a navigation device that displays a route from a current location to a destination, and particularly relates to a navigation device that can display a planned arrival location after a predetermined time has elapsed. .

[Conventional technology]

Conventional devices search for and display the shortest route a vehicle can take from its departure point to its destination, as described in Japanese Patent Application Laid-Open No. 62-91811.

[Problem to be solved by the invention]

The above conventional technology searches for the shortest possible route from the starting point to the destination and displays the shortest possible route, but the expected destination position after a predetermined time from a predetermined point takes into consideration the real-time average speed of the vehicle. No consideration was given to displaying the

The object of the present invention is to solve the problems of the prior art described above.

An object of the present invention is to provide a navigation device that can provide a user with information on an expected arrival position after a predetermined time has elapsed in real time.

[Means to solve the problem]

The above object is to provide a navigation device having a function of setting a travel route from a predetermined point to a destination, a means for determining an average speed within a past fixed time from the predetermined point;
The present invention is characterized in that it includes means for determining an expected arrival position after a predetermined time has elapsed based on the average speed, and means for displaying the expected arrival position.

[For production]

When a driving route from a predetermined point to a destination is set on the display means, the CPU calculates the average speed from the distance traveled within a certain period of time before reaching the predetermined point, and calculates the travel time of the car. As time progresses, the above average speed is updated sequentially.

When the user selects the predicted destination display mode while the car is driving, the predicted destination distance after a predetermined time from a predetermined point is calculated based on the latest average speed, and the predicted destination position is displayed. .

As a result, according to the present invention, the user can know the expected arrival position in real time according to the driving situation of the car without having to calculate it by himself/herself.

〔Example〕

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a system configuration diagram showing an embodiment of the present invention, in which 10 is a CPU, 11 is a display control device, 12 is a display device, 13 is a current location detection device, 14 is an input device, and 15 is an external storage device. It is.

FIGS. 2 and 3 are flowcharts for explaining the operation of this embodiment, with FIG. 2 being a flowchart showing the operation of the CPU10, and FIG. 3 being a flowchart showing interrupt processing during said operation.

When the system shown in FIG. 1 is started, the CPU 10 first receives the surrounding map data of the current location from the external storage device 10 based on the user's instructions, and displays it (step S
L). Next, the current location data is received from the current location detection device 13 and displayed via the display control device 11! ! 12 displays the position of the own army (step S2).

Next, when the user sets the destination from the input device 14 (
Step S3), the shortest travel route to the destination is set (Step S4).

Through the above steps 81 to S4, as shown in FIG. 4(a).
A map of the surroundings of the current location, the own military position 40, and the shortest travel route 41 are displayed as shown in FIG.

When the initial settings are completed through the above process and the car starts driving,
The current location is updated (step s5), and the sequential vehicle speed is stored (step s6). That is, the CPU 10 calculates and records the average speed from the distance traveled by the vehicle within a certain period of time from the present.

Next, it is determined whether or not a mode selection instruction has been given by the user through the input device 14 (step S7), and if a mode has been selected (YES in step s7), an interrupt process is performed (step s9).

On the other hand, when there is no mode selection (No in step S7), it is determined whether or not the destination has been reached (step S8), and when the determination is negative, the process returns to step S5 to update the current location. It will be done.

In the manner described above, the user is guided to the shortest route to the destination.

Next, interrupt processing when a mode is selected in step S7 will be explained with reference to FIG.

When the user selects the expected arrival position display mode while the car is traveling at any position on the travel route shown in Figure 4 (,),
Enter interrupt processing. When entering the interrupt processing, based on the sequential vehicle speed determined in step S6,
The average speed in a predetermined range, that is, the latest average speed is determined (step 591).

Next, when the user sets the desired time (step 592
), the expected travel distance is calculated from the average speed and desired time (step 593). Example 4jf, 1 as desired time
When the time is set, the CPU 10 calculates the expected reachable distance of the own army's position after one hour from the current location based on the average speed.6Then, the expected reached position is shown in FIG. 4(b). 42 in FIG. 4(b) indicates the expected arrival position, which is displayed on the display device 2 as shown in FIG. 4(b) (step S94).

When the interrupt processing S9 is completed, the process returns to step S81 and the processing is continued.

According to this embodiment, it is possible to calculate the predicted arrival position after the predetermined time has elapsed using the latest average speed as data, so the user can calculate the expected arrival position after the elapse of the predetermined time according to the driving situation at that time. It is possible to obtain arrival position information.

〔Effect of the invention〕

According to this embodiment, if a travel route from a predetermined point to a destination is set, the user can easily set the desired time and predict the time after the predetermined time has elapsed according to real-time travel conditions. You can know the location you have reached. Therefore, there is an effect that the user can save the unnecessary effort of calculating the predicted arrival position by himself/herself.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram showing one embodiment of the present invention, FIGS. 2 and 3 are flowcharts for explaining the operation of one embodiment of the present invention, and FIG. 4 is a display according to this embodiment. It is a figure showing an example of a display of a device. 10...CPU, 11...Display control device, 12...
・Display device, 13... Current location detection device, 14... Input device, 15... External storage device, 40... Own army position, 41... Location 2nd Ward Akira Kuni 5th No. 4

Claims (1)

[Claims] 1. In a navigation device installed in a car and having a route guidance function from a predetermined position to a destination, means for determining an average speed within a certain past time from the predetermined position, based on the average speed, from the time when the predetermined position is passed. A navigation device comprising means for determining an expected arrival position after a predetermined period of time has elapsed, and means for displaying the expected arrival position.