JPH09257504A - Navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To previously detect the existence of obstacle, which hinders the traveling on a guide route, and to automatically set other route for bypassing this position, in which the obstacle exist. SOLUTION: This navigation system is provided with a CD block 6 having a CD-ROM, in which the map data including the road information is stored, a key block 5 for setting a starting point and a destination in the map data stored in the CD-ROM, a FM antenna 4, a FM tuner 14 and a FM multi decoder 15 for receiving the traffic information program of the FM character multi broadcasting, and a CPU 13 for computing a route from the starting point to the destination, which is set on the basis of the road information of the map data, and for recomputing other route different from the first route in the case where the traffic information related to the first route is input from the FM multi decoder 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device for a vehicle having a route guidance function.

[0002]

2. Description of the Related Art In recent years, GPS (Global Posi)
2. Description of the Related Art Navigation devices for automobiles, which utilize the Tioning System), have become widespread. In this type of navigation device, the latitude information and the longitude information of the current position are calculated based on signals from a plurality of artificial satellites received by a GPS antenna, and the road around the current position read from a recording medium such as a CD-ROM is calculated. Map data including information and place name information is developed and displayed on a monitor display. Further, in the navigation device, it is general that a navigation route is set in advance and a route guidance function is provided for guiding the route according to the set route.

[0003]

However, the route set by the route guidance function is merely calculated based on map data, and real-time information such as whether the route is currently congested or not. Is not utilized.
Therefore, if you run into a traffic jam while traveling along the route indicated by the route guidance function, or if the highway interchange is temporarily closed, you need to set another route again. May occur. In such a case, it is necessary to perform a predetermined operation for resetting to another route in the situation facing the scene, and the operation is complicated, and there is a high risk, and avoidance in advance. I can't.

The present invention has been made in view of the above circumstances, and an object of the present invention is to detect this in advance when there is an obstacle that makes it difficult to travel along a guide route, It is an object of the present invention to provide a navigation device capable of automatically resetting another route that bypasses a faulty position.

[0005]

According to the first aspect of the present invention,
Map data storage means for storing map data including road information, setting means for setting a starting point and a destination in the map data stored in the map data storage means, and roads stored in the map data storage means Route calculation means for calculating the route from the origin to the destination set by the setting means based on the information, input means for inputting fault information on the route obtained by this route calculation means, and this input It is characterized by further comprising control means for causing the route calculation means to recalculate another route different from the original route according to the failure information inputted by the means.

With such a configuration, if any failure occurs in the guide route to be advanced, a new other route is automatically recalculated immediately and the guide is started according to the obtained other route. be able to.

According to a second aspect of the present invention, in the above-mentioned first aspect of the invention, when the input means has its own traveling speed on the route obtained by the route calculating means is equal to or less than a predetermined value. It is characterized by inputting fault information to.

According to a third aspect of the present invention, in the first aspect of the present invention, the input means has the number of times of self stop on the route obtained by the route calculation means is a predetermined value or more within a certain time. The navigation device according to claim 1, wherein the failure information is input in the case of.

In any of these configurations, in addition to the effect of the invention described in claim 1, a new route is automatically re-established immediately when it is determined that there is congestion from the moving speed or the number of stops. Since the calculation is performed, even if the user suddenly encounters a traffic jam, the route can be reset without panicking, and the traffic jam can be exited relatively early.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the receiving means for receiving traffic information is further provided, and the input means calculates the route in the traffic information received by the receiving means. When the fault information on the route obtained by the means is included, it is judged and the fault information is inputted.

With such a configuration, in addition to the operation of the invention described in claim 1, another route that bypasses the faulty position in advance is recalculated based on the traffic information of the teletext. Can be obtained by

According to a fifth aspect of the invention, in the first aspect of the invention, the input means determines whether or not the control means recalculates the other route depending on the content of the fault information input. It is characterized by determining.

With such a configuration, in addition to the effect of the invention described in claim 1, the route is recalculated if it is determined that the content of the fault information is relatively minor. It is possible to prevent the user from being confused by suppressing unnecessarily changing the route.

According to a sixth aspect of the present invention, in the above-mentioned first aspect of the invention, the control means determines another route due to a difference between another route obtained by recalculating the route calculation means and the original route. It is characterized by determining whether or not to adopt.

With such a configuration, in addition to the operation of the invention described in claim 1, when it is determined that another route obtained by recalculation is largely deviated from the original route, It is possible to prevent the user from being confused by suppressing the use of another route obtained by calculation and changing the route unnecessarily.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) A first embodiment in the case where the present invention is applied to a navigation device for a vehicle using GPS and FM text multiplex broadcasting will be described below with reference to the drawings.

FIG. 1 shows a circuit configuration of the entire apparatus, which includes a GPS antenna 1 installed on the roof of a vehicle body,
The L1 band (1.57542 GHz) C / A code data received by the GPS antenna 1 from a plurality of GPS satellites is demodulated and decoded by the despreading LSI to determine the latitude of the current location,
It has a GPS block 2 for calculating longitude, height, time and the like.

The GPS block 2 is connected to a graphic block 3, which includes an FM antenna 4, a key block 5 having various input keys such as a mode key and a cursor key which will be described later, road information and A CD block 6 in which a CD-ROM which is a recording medium for recording map data including place name information is mounted, for example, a monitor block 7 having a display device including a color LCD panel and a drive circuit thereof is connected. .

The graphic block 3 includes a ROM 11
CPU 13 which controls the entire apparatus based on the operation program stored in the RAM and various data stored in the RAM 12.
Is provided.

In the graphic block 3, an FM tuner 14 for demodulating the FM radio wave received by the FM antenna 4 to obtain an FM audio signal of a desired broadcasting station.
An FM multiplex decoder 1 which is connected to the M tuner 14 and decodes a character signal multiplexed with the FM audio signal.
5, a CPU peripheral circuit gate array (G / G) which mainly controls the input / output of data between the GPS block 2, the key block 5, the CD block 6 and the CPU 13.
A) 16 and the graphic controller 17 are the above R
It is provided by bus connection together with the OM 11, the RAM 12, and the CPU 13, and further the video RAM 18 is connected to the graphic controller 17.

When the GPS block 2 sends the latitude and longitude data of the present location, that is, the position data together with other data representing the height, time, etc., while the vehicle travels on the road, the CPU peripheral circuit G / A16. Call the map data around the current location from the CD block 6 via
While being sent as display data to the graphic controller 17 to which the video RAM 18 is connected, the traffic information of the FM text multiplex broadcast decoded by the FM multiplex decoder 15 is read out as necessary and stored in the RAM 12.

In the graphic controller 17, the CP
Map data sent from U13 to video RAM18
The display data is expanded to create display data for each screen, and the created display data is sent to the monitor block 7 to display a map.

2A and 2B show the external structure of the remote control unit 20 mainly comprising the key block 5, FIG. 2A being a left side view and FIG. 2B being a top view. The remote control unit 20 is a wired remote controller in which a remote control body case 21 is connected to the key block 5 by a cable. As shown in FIG. 2A, a power switch is turned on / off by a slide switch on the left side surface of the remote control body case 21. A power switch 22 is provided for performing.

Further, as shown in FIG. 2B, the power source LED 23, NAVI /
CD key 24, TV key 25, FM DATA key 2
6, MENU key 27, cursor key 28, ENTER
Key 29, position key (shown as "POS" in the figure)
30, scale change / tuning key 31, MARK key 32, POINT key 33, HOME key 34 and VI
A DEO key 35 is provided.

The power LED 23 is the power switch 22.
Lights red when the power is turned on. NAVI /
The CD key 24 is a key to be operated when a navigation operation is performed by this apparatus, or when a music CD is mounted on the CD block 6 for music appreciation, although description thereof is omitted in the present embodiment.

Although not described in this embodiment, the TV key 25 is a key to be operated when a TV tuner (not shown) is connected to the graphic block 3 to watch TV on the monitor block 7, and FM DATA.
The key 26 is a key operated when the character information of the FM character multiplex broadcast obtained from the FM multiplex decoder 15 is displayed on the monitor block 7.

The MENU key 27 is a key for instructing the display of a menu screen, and the cursor key 28 is a ring-shaped key for instructing the movement of the cursor displayed on the display screen of the monitor block 7 in the up, down, left and right directions on the menu screen or the like. Key, EN
A TER key 29 is a key for operating an icon or the like indicated by a cursor on the display screen by moving the cursor key 28.

The position key 30 is a key for displaying the latitude and longitude of the current position indexed by the antenna 1 and the GPS block 2, and the scale change / tuning key 31 is the scale of the map displayed during navigation operation. Key for instructing up / down tuning during television or radio reception operation.

Further, the MARK key 32 is a key for marking a passing position or the like in the route guidance function at an arbitrary position of the map data, and the POINT key 33 is for setting a destination and setting the destination side when the route guidance function is operating. The HOME key 34 is a key for instructing screen scrolling and the like, and is also a key for instructing setting of the current location and screen scrolling to the current location side when the route guidance function is operating.

Although the VIDEO key 35 is not described in this embodiment, a video camera (not shown) or the like is connected to the graphic block 3 to connect the monitor block 7 to the monitor block 7.
Are operated when watching a video.

Next, the operation of the first embodiment will be described. FIG. 3 mainly shows the processing contents when the route guidance function is executed by the CPU 13, and initially displays the guidance route based on the set contents, and after executing the guidance process for issuing a predetermined voice if necessary (step A1),
While calculating the traveling speed information of the own vehicle from the time series of the current position information, or inputting the speed information directly from the vehicle speed sensor for autonomous navigation, which is not shown in FIG. 1 above,
It is determined whether or not the current speed information of the own vehicle is 20 [km / hour] or less (step A2).

That is, the CPU 13 determines whether or not the vehicle is currently involved in a traffic jam. When it is determined that the speed information of the vehicle is higher than 20 [km / hour], the CPU 13 returns to step A1. By returning to the route guidance processing, the vehicle waits until the speed information of the vehicle becomes 20 [km / hour] or less.

When it is determined in step A2 that the speed information of the own vehicle is 20 [km / hour] or less for the first time, the CPU 13 has a predetermined time, for example, 5
A timer for counting minutes is started, and then it is determined whether or not this timer has reached the predetermined time (step A).
3).

This timer is used for distinguishing a state in which the speed information of the vehicle is temporarily reduced due to, for example, waiting for a signal or a temporary stop, from a state in which the speed is reduced for a longer time due to, for example, traffic jam, When it is determined that the time value is not within the predetermined time, the process returns to step A1 and continues the route guidance process.

If the judgment that the current speed information of the vehicle is 20 [km / hour] or less continues for a predetermined time by repeating the processing of steps A1 to A3 in this way, the CPU 1
3 determines this from the contents of the timer, and calculates a new guide route by map data from the current position and the already set destination (step A4).

Then, the calculated new guide route is
After confirming that the route is different from the initial guide route (step A5), the route guide processing based on the new guide route is started (step A6), and the step A is performed again.
The procedure is repeated to proceed to 1 and wait for the speed information of the own vehicle to be 20 [km / hour] or less again while continuing the process of route guidance by a new route.

As described above, even if the user does not perform any key operation, if he / she encounters a traffic jam at the time of route guidance, this is immediately judged and another route is automatically set again. So, even if you suddenly come across a traffic jam, the route will be reset automatically without panic,
You will be able to get out of the traffic relatively quickly.

In the above embodiment, it is determined that the vehicle is congested when the traveling speed is equal to or less than the value continuously set for a certain period of time. However, the determination method is not limited to this. It is also possible to count the number of times the vehicle has stopped during traveling and determine that the traffic is congested when the vehicle has stopped the number of times set within a certain time.

(Second Embodiment) In the following, the present invention is applied to GPS.
Also, a first embodiment in the case of being applied to a car navigation device using FM text multiplex broadcasting will be described with reference to the drawings.

The circuit configuration of the entire apparatus is the same as that shown in FIG. 1, and the external configuration of the remote control unit, which mainly comprises the key blocks, is shown in FIG. The same parts are designated by the same reference numerals, and the illustration and description thereof will be omitted.

Next, the operation of the second embodiment will be described. FIG. 4 mainly shows the processing contents when the CPU 13 executes the route guidance function. Initially, the guidance route based on the set contents is displayed, and after performing the guidance process for issuing a predetermined voice if necessary (step B1),
It is determined whether or not a traffic information program by FM text multiplex broadcasting has been received from the FM multiplex decoder 15 (step B).
2).

When it is judged that the information has been received, the contents of the traffic information are further related to the guidance route from the current position of the vehicle to the destination, such as traffic jams, roadblocks, traffic accidents, closures of highway interchanges, etc. , It is determined whether or not the information is an obstacle to traveling (step B3).

If it is determined in step B2 that the traffic information program by FM text multiplex broadcasting has not been received, or if it is determined in step B3 that the content of the traffic information is not information related to the guide route, In either case, the process directly returns to the route guidance process from step B1.

However, if it is determined in step B3 that the contents of the traffic information are information related to the guide route,
Next, if the information is, for example, information indicating a traffic jam, it is an obstacle that greatly hinders the travel of the guide route, such as whether or not the length information is equal to or longer than the preset length information x [km]. It is determined whether or not (step B4).

If all the congestion points are not included in the guide route, the congestion distance on the guide route is calculated and it is determined whether or not the length information is equal to or more than the length information x [km]. Also, if the information is of a type that cannot be traveled on the route to any extent, such as traffic closures and the closure of highway interchanges, unconditionally significantly impedes the travel of the guidance route. It is judged as a failure.

If it is determined in step B4 that the obstacle does not significantly hinder the travel of the guidance route, the process returns to the route guidance processing from step B1 again, but the obstacle significantly hinders the travel of the guidance route. If it is determined that, a new guide route is calculated by map data from the current position and the destination already set (step B5).

In this case, the initial guide route is usually set by selecting the shortest route possible.
The newly calculated guide route has a longer route setting than the original guide route.

Then, the calculated new guide route is
Whether or not to clear the traffic information, for example, in the case of information indicating congestion, the preset length information x
It is confirmed whether or not it is less than [km], such as whether or not it is a fault that significantly hinders the traveling of the guide route (step B6).

In this case, if the traffic information is of a type such that the route cannot be traveled to any extent, such as closure of a highway interchange or the like, the traffic information is simply It is determined whether or not the traveling of the guide route is obstructed. When it is determined that the obstacle is not cleared, the process goes to step B5 again to obtain another guide route.

However, if it is determined in step B6 that the new guide route has cleared the obstacle based on the traffic information, then the route length from the current position of the new guide route to the destination is the same route as the original guide route. A certain percentage compared to the length,
For example, it is determined whether it exceeds 200%, that is, whether the new guide route is extremely longer than the original guide route (step B7).

As described above, this is usually set by selecting the shortest possible route as the initial guide route, so that the newly calculated guide route should be compared to the original guide route. This is because it takes into consideration that there is a tendency for longer routes to be set.

However, in step B7, the route length of the new guide route does not exceed a certain ratio as compared with the route length of the original guide route, and the new guide route is compared with the original guide route. When it is determined that the route is not so long, the route guidance process based on the new guidance route is started as it is (step B9), the process proceeds to step B1 again, and the route guidance process by the new route is continued. While
Waiting for the receipt of traffic information that impedes the running of the vehicle again,
This operation is repeatedly executed.

FIG. 5 shows an example of the navigation screen displayed on the monitor block 7 at this time.
SC is the vehicle position display, and the thick solid line along the road in front of the vehicle position display SC is the initially set guide route display GR, and the arrow partially along the guide route display GR is the route. The upper traffic congestion display DL and the thick dotted line are the detour route display RR after the route change to the guide route display GR.

With such a display screen, it is possible to understand at a glance the relationship between the vehicle position, the initial route, the congestion section in the route, and the detour route for avoiding the congestion.

In the display screen of FIG. 5, a portion of the guide route display GR that is not used by passing the detour route display RR is not used and the traffic congestion display D is not used.
Only L may be displayed.

In step B7, the route length of the new guide route exceeds the route length of the original guide route by more than a certain ratio, and the new guide route is more extreme than the original guide route. If it is determined that the guide route is too long, the guide route is intentionally returned to the original one before the change (step B8), the route guide process based on the original guide route is restarted (step B9), and the process returns to step B1 again. Then, while continuing the route guidance processing based on the initial route, the operation of again waiting for the reception of traffic information that impedes the traveling of the own vehicle is repeatedly executed.

In the process shown in FIG. 4, the reception of traffic information relating to the traveling guide route is detected and a new guide route is automatically calculated. However, the detected traffic information is not changed. A window may be displayed on a part of the monitor block 7, and a new guide route may be calculated in response to a predetermined key operation of the remote control unit 20 by the user according to the display content.

In the second embodiment, the system is described as including the FM antenna 4, the FM tuner 14, and the FM multiplex decoder 15, and the traffic information is received by the FM text multiplex broadcast. However, the present invention is not limited to this, and other ATIS (Advanced Traf)
fic Information Service :)
And VICS (Vehicle Information)
Needless to say, a configuration using a traffic information service such as a communication system (road traffic information communication system) may be used. In addition, the present invention is not limited to the first and second embodiments described above, and various modifications can be made without departing from the scope of the invention.

[0059]

According to the first aspect of the present invention, when some trouble occurs in the guide route to be advanced, a new another route is automatically recalculated immediately and the guide route is obtained according to the obtained other route. Can start.

According to the invention described in claim 2 or 3, in addition to the effect of the invention described in claim 1, a new other route is automatically set at the time when it is judged from the traveling speed or the number of stops that there is congestion. Since it will be recalculated automatically, even if a traffic accident is suddenly encountered, the route can be reset without panicking, and the traffic can be exited relatively early.

According to the invention as set forth in claim 4, in addition to the effect of the invention as set forth in claim 1, another route for bypassing a faulty position in advance is re-established based on the traffic information of the teletext. It can be obtained by calculation.

According to the invention of claim 5, in addition to the effect of the invention of claim 1, if the content of the fault information is judged to be relatively minor, the route is recalculated. It is possible to prevent the user from being confused by suppressing the unnecessarily changing the route.

According to the invention described in claim 6, in addition to the effect of the invention described in claim 1, when it is judged that another route obtained by recalculation is largely deviated from the original route. It is possible to prevent the user from being confused by suppressing the use of another route obtained by the recalculation and changing the route unnecessarily.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration of an entire device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an external configuration of a remote control unit of the remote control unit that constitutes the key block of FIG.

FIG. 3 is a flowchart showing the contents of operation processing according to the same embodiment.

FIG. 4 is a flowchart showing the contents of operation processing according to the second embodiment of the present invention.

FIG. 5 is a diagram showing an example of a display screen according to the same embodiment.

[Explanation of symbols]

 1 ... GPS antenna 2 ... GPS block 3 ... Graphic block 4 ... FM antenna 5 ... Key block 6 ... CD block 7 ... Monitor block 11 ... ROM 12 ... RAM 13 ... CPU 14 ... FM tuner 15 ... FM multiple decoder 16 ... CPU peripheral Circuit gate array 17 Graphic controller 18 Video RAM 20 Remote control unit 21 Remote control case 22 Power switch 23 Power LED 24 NAVI / CD key 25 TV key 26 FM DATA key 27 MENU key 28 Cursor Key 29 ... ENTER Key 30 ... Position Key 31 ... Scale Change / Tuning Key 32 ... MARK Key 33 ... POINT Key 34 ... HOME Key 35 ... VIDEO Key DL ... Traffic Congestion Display GR ... Guided Route Display RR ... Detour route display SC ... Display of own vehicle position

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location H04N 7/18 G06F 15/62 335

Claims (6)

[Claims] 1. A map data storage means for storing map data including road information, a setting means for setting a starting point and a destination in the map data stored in the map data storage means, and the map data storage means. Route calculation means for calculating the route from the starting point to the destination set by the setting means on the basis of the road information stored in the route information, and obstacle information for obstructing movement on the route obtained by the route calculation means And a control means for causing the route calculation means to recalculate another route different from the original route according to the fault information input by the input means. apparatus. 2. The input means inputs the fault information when the moving speed of the user on the route obtained by the route calculating means becomes a predetermined value or less.
A navigation device as described. 3. The input means inputs fault information when the number of times of self stop on the route obtained by the route calculation means becomes a predetermined value or more within a fixed time. The navigation device according to claim 1. 4. The reception means for receiving traffic information is further provided, and the input means includes fault information on the route obtained by the route calculation means in the traffic information received by the reception means. 2. The navigation device according to claim 1, wherein in this case, the fault information is input by judging this. 5. The input means determines whether or not to recalculate the other route by the control means according to the content of the fault information that has been input.
A navigation device as described. 6. The control means determines whether or not to adopt another route based on a difference between the other route obtained by recalculation by the route calculation means and the original route. The described navigation device.