JPH1164031A - Car navigation system and method for bypass route - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a car navigation system, wherein a bypass route is quickly set and displayed relating to inter-car communication. SOLUTION: A reception means P7 for receiving an information signal transmitted from other cars P8 and P11, a guiding route congestion detecting means P9 for detecting whether a congestion exists on a guiding route based on the information signal received from the other car P8 on the route guiding road, a bypass route detecting means P10 for detecting a bypass route which detours a congestion point based on a road map stored in a storage means P3, when the presence of congestion on the guiding route is detected, a bypass route congestion detecting means P12 for detecting whether a congestion is presents on the bypass route based on the information signal received from the other car P11 on the bypass route, are provided. A control means P6 makes a display means P5 for displaying the bypass route, when no congestion is detected on the bypass route.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle for setting a guide route to a destination and searching for a detour route that bypasses the congested point when there is traffic on the set guide route. The present invention relates to a navigation device and a bypass route setting method.

[0002]

2. Description of the Related Art Conventionally, as a device for judging traffic congestion according to a signal received from another vehicle and automatically setting a detour route when it is deemed to be a traffic congestion, for example, Japanese Patent Application Laid-Open No. 8-28 is disclosed.
There is an apparatus described in US Pat.

[0003] That is, based on the map data read by the map data reading unit and the current position measured by the current position measuring unit, a route to the set destination is set (guide route setting), and the position of the own vehicle is set. To the other vehicle, receive the position of the other vehicle, extract other vehicles existing on the route based on the received position of the other vehicle, and the number of the extracted other vehicles impedes the smooth passage of the own vehicle. Judgment whether the number of other vehicles is large or not (when it is considered that there is congestion), the on-board vehicle configured to change the set route (set a detour route) It is a navigation system. However, simply changing the route that was set,
There is a problem that it is difficult to quickly set the above-described detour route and immediately display the detour route.

[0004]

SUMMARY OF THE INVENTION The invention according to claim 1 of the present invention detects the presence or absence of traffic congestion on a guidance route based on an information signal from another vehicle on the route guidance route and, when there is traffic congestion, makes a detour. The route is detected, and whether or not there is congestion on the detour route is detected based on an information signal from another vehicle on the detour route, and if there is no congestion on the detour route, the detour route is detected. An object of the present invention is to provide a vehicular navigation apparatus that can quickly set and display a detour route in inter-vehicle communication by displaying.

According to a second aspect of the present invention, in addition to the object of the first aspect, the directivity of the receiving means is set in the direction of the guide route or the detour route to obtain information. It is an object of the present invention to provide a vehicle navigation apparatus capable of obtaining information (presence or absence of traffic congestion) of an area (direction) requesting a vehicle in a good and prompt manner.

According to a third aspect of the present invention, in addition to the object of the first aspect, a request signal is transmitted, and an information signal responsive to the request signal is obtained from another vehicle. Accordingly, it is an object of the present invention to provide a vehicle navigation device that can improve the timing of obtaining information.

According to a fourth aspect of the present invention, in addition to the object of the third aspect, the directivity of the transmitting means for transmitting the request signal is set to the direction of the guidance route or the detour route. Accordingly, it is an object of the present invention to provide a vehicular navigation device that can reliably transmit a request signal to another vehicle existing in an area (direction) where information acquisition should be requested.

According to a fifth aspect of the present invention, in addition to the object of the third aspect of the present invention, an area designating code is inserted into the request signal so that only other vehicles on the area (within the area) are provided. It is an object of the present invention to provide a vehicular navigation device that can obtain an information signal only from a necessary area by obtaining an information signal from a vehicle.

According to a sixth aspect of the present invention, in addition to the object of the first aspect, when there is congestion on a route guidance route, two or more detour routes are set.
It is an object of the present invention to provide a vehicular navigation device that can cope with another set of detour routes even when one set detour route is congested and can set a specific detour route in a short time. .

[0010] The invention according to claim 7 of the present invention detects the presence or absence of congestion on the guide route based on an information signal from another vehicle on the route guide route, and then detects the detour route when there is congestion. A method of detecting whether there is congestion on the detour route based on an information signal from another vehicle on the detour route and displaying the detour route if there is no congestion on the detour route Accordingly, an object of the present invention is to provide a detour route setting method that can quickly set and display a detour route in inter-vehicle communication.

[0011]

According to a first aspect of the present invention, there is provided a current position detecting means for detecting a current position, a storing means for storing a road map, and a guidance for setting a guidance route to a destination. A vehicle navigation device comprising: a route setting unit; a display unit for visually displaying necessary information; and a control unit for displaying a road map, a current position, and a guidance route on the display unit. Receiving means for receiving an information signal, guidance route traffic congestion detecting means for detecting whether or not there is congestion on the guidance route based on the information signal received from another vehicle on the route guidance route, and When it is detected that there is a traffic jam, a detour route detecting means for detecting a detour route to bypass the congested point based on the road map stored in the storage means, and whether another vehicle is on the detour route A bypass route traffic jam detection means for detecting whether or not there is a traffic jam on the bypass route based on the received information signal, wherein the control means is configured to detect when there is no traffic jam on the bypass route. It is a vehicular navigation device for displaying the detour route on the display means.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the invention further comprises a traveling direction detecting means for detecting a traveling direction of the own vehicle, and the receiving means has a predetermined directivity. And a vehicle navigation apparatus provided with a receiving directivity setting means for setting the directivity of the receiving means in the direction of the guide route or the detour route.

According to a third aspect of the present invention, in addition to the configuration of the first aspect of the present invention, there is provided a transmitting means for transmitting a request signal. It is a vehicle navigation device for obtaining an information signal.

According to a fourth aspect of the present invention, in addition to the configuration of the third aspect of the present invention, the transmitting means has a predetermined directivity, and the transmitting means has the guidance route or the detour route. And a transmission directivity setting means for setting the directivity of the transmission means in the direction of.

According to a fifth aspect of the present invention, in addition to the configuration of the third aspect of the present invention, an area designating code is inserted into the request signal to obtain an information signal only from another vehicle in the area. It is a navigation device for vehicles that performs

According to a sixth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the detour path detecting means is a vehicle navigation device for setting the predetermined number of the detour paths to two or more. There is a feature.

According to a seventh aspect of the present invention, there is provided a current position detecting means for detecting a current position, a storage means for storing a road map, a guidance route setting means for setting a guidance route to a destination, and In a vehicle navigation device comprising a display means for visually displaying information, and a control means for displaying a road map, a current position and a guidance route on the display means, an information signal received from another vehicle on the route guidance path may be used. Detecting whether there is congestion on the guidance route based on the traffic route, and then, when it is detected that there is congestion on the guidance route, bypasses the congestion location based on the road map stored in the storage means. After detecting the detour route, it detects whether there is congestion on the detour route based on the information signal received from another vehicle on the detour route, and determines that there is no congestion on the detour route. When issued, characterized in that said control means is a detour route setting method to be displayed on the display means detour route.

[0018]

According to the first aspect of the present invention, as shown in the claim correspondence diagram of FIG. 10, the current position detecting means P1 detects the current position of the own vehicle P2 and the storing means P3. Stores a road map (specifically, road map information), the guide route setting means P4 sets a guide route to the destination of the vehicle P2, the display means P5 visually displays necessary information, and the control means P6 displays. The means P5 displays the road map, the current position, and the guidance route. The receiving means P7 receives the information signal transmitted from the other vehicle P8.

The guide route congestion detecting means P9 detects whether there is congestion on the guide route based on the information signal received from another vehicle P8 on the route guide route set by the guide route setting means P4. If there is a congestion on this guidance route, the detour route detecting means P10 detects a detour route to bypass the congested point based on the road map stored in the storage means P3.

Then, another vehicle P1 on this detour route
1 on the basis of the information signal received from the detour route
12 detects whether or not there is congestion on the detour route, and when the control means P6 detects that there is no congestion on the detour route, the control means P6 displays the detour route on the display means P5. As a result, there is an effect that the detour route can be quickly set and displayed in the inter-vehicle communication.

According to the second aspect of the present invention,
In addition to the effect of the first aspect of the invention, the traveling direction detecting means P13 detects the traveling direction of the host vehicle P2 in preparation for setting the directivity, and the receiving directivity setting means P14 performs the above-described guidance route or detour route. Is set to the direction of the receiving means P7. For this reason, there is an effect that the information (the presence or absence of traffic congestion) of the area for which the information acquisition is requested can be obtained in a good and as quickly as possible.

According to the third aspect of the present invention,
In addition to the effect of the first aspect of the present invention, a transmitting unit P15 for transmitting a request signal is provided.
5 to send a request signal to other vehicles P8 and P11.
Since the information signal is obtained from, the timing of obtaining the information can be improved. In other words, there is an effect that an information signal can be satisfactorily obtained at the time of an information acquisition request.

According to the invention described in claim 4 of the present invention,
In addition to the effect of the third aspect of the present invention, the transmission directivity setting means P16 sets the directivity of the transmission means P15 in the direction of the guidance route or the detour route. ) Has the effect of reliably transmitting the request signal to the other vehicles P8 and P11.

According to the invention described in claim 5 of the present invention,
In addition to the effect of the third aspect of the present invention, since the area designating code is inserted into the request signal and the information signal is obtained only from other vehicles in the area, the information signal is obtained only from the necessary area. For example, it is possible to prevent unnecessary information signals from being obtained from another vehicle existing outside the area, which may cause noise, and to improve the S / N ratio of the information to be obtained.

According to the sixth aspect of the present invention,
In addition to the effect of the first aspect of the present invention, since the detour path detecting means P10 sets two or more detour paths, even if one set detour path is congested, other detour paths are not congested. It is possible to cope with a detour route, and there is an effect that a detour route without traffic congestion can be set within a short time.

According to the seventh aspect of the present invention,
As shown in the claim correspondence diagram of FIG. 10, the current position detecting means P1 detects the current position of the host vehicle P2, and
Stores a road map (specifically, road map information), the guide route setting means P4 sets a guide route to the destination of the vehicle P2, the display means P5 visually displays necessary information, and the control means P6 displays. The means P5 displays a road map, a current position, and a guidance route.

Then, first, it is detected whether or not there is a congestion on the guidance route based on the information signal received from the other vehicle P8 on the above-mentioned guidance route. Is detected, a bypass route that bypasses the congested point is detected based on the road map stored in the storage unit P3, and then another vehicle P1 on the bypass route is detected.
Based on the information signal received from No. 1, it is detected whether or not there is congestion on the detour route. If there is no congestion on the detour route,
The control means P6 causes the display means P5 to display this detour route. Therefore, there is an effect that the detour route can be set early and displayed immediately in the communication between the vehicles.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawing shows the vehicle navigation apparatus and the detour route setting method. In FIG. 4, the navigation system configuration of the own vehicle A as the own vehicle and the other vehicles X, Y, and Z as the other vehicles are the same. , FIGS. 1 and 2
The navigation system configuration will be described with reference to FIG.

In FIG. 1 and FIG. 2, an antenna 2 having directivity for transmission and reception is provided upright outside the vehicle 1, and a reception circuit 3 and a transmission circuit 4 are connected to the antenna 2. The antenna 2 and the receiving circuit 3 constitute a receiving unit, and the receiving unit is configured to receive a request radio signal (hereinafter simply referred to as a request signal) α or an information signal β. That is, in FIG. 4, the own vehicle A receives the information signal β, and the other vehicles X, Y, and Z receive the request signal α.

The transmitting means is constituted by the antenna 2 and the transmitting circuit 4, and the request signal α
(See FIG. 4) or an information signal β (see FIG. 4) in response to the request signal α. That is, in FIG. 4, the own vehicle A transmits the request signal α,
The other vehicles X, Y and Z transmit the information signal β.

The above-mentioned receiving circuit 3 and transmitting circuit 4 are connected to a CPU 5 as a control means, and this CPU 5 transmits the above-mentioned signal to the transmitting circuit 4 and the antenna 2 when the antenna 2 and the receiving circuit 3 receive the request signal α. (See other vehicles X, Y, Z).

On the other hand, a GPS receiving device 7 is connected to a GPS antenna 6 for receiving radio waves from a GPS satellite (not shown), and the GPS receiving device 7 is connected to a gyro as a traveling direction (relative running direction) detecting means. The mouth 8 and a vehicle speed sensor 9 as vehicle speed detecting means are connected to the CPU 5 respectively,
In order to calculate the position, the traveling direction, and the traveling speed of the vehicle 1 by the own vehicle position, traveling direction, and speed calculating unit 10 (hereinafter simply referred to as a computing unit) as the own moving body state detecting means configured inside U5. Make up.

Inside the CPU 5, the above-mentioned operation unit 10 is provided.
Transmission / reception signal processing unit 11, random number generation unit 12, timer 1
3 are formed, and the state of the own vehicle A (see FIG. 4) (the traveling direction in detail) and the state of other vehicles X, Y, Z (see FIG. 4) in the transmission / reception signal processing section 11 (see FIG. 4) And a transmission prohibition processing unit 14 (prohibition means) that prohibits transmission of the information signal β based on the traveling direction).

On the input side of the CPU 5, a manual switch 15 for performing various input operations in addition to a detour operation switch function by an occupant, and a guidance route setting means 1 such as a joystick for inputting and setting a guidance route to a destination.
6 and a map memory 17 (storage means) such as a CD-ROM for storing road map information are connected via an interface.

On the output side of the above-mentioned CPU 5, a navigation screen, a screen for various input operations, an LCD 18 as display means for displaying the state of the moving body (vehicle speed, air conditioning setting, etc.) in a touch-operable manner, and a notifying means And a buzzer 19 are connected via an interface.

The CPU 5 receives various input signals from the GPS receiver 7, the gyro 8, the vehicle speed sensor 9, the receiving circuit 3, the guide route setting means 16, the map memory 17, and the manual switch 15 also serving as a detour operation switch. Based on the program stored in the ROM 20
The driving of the transmission circuit 4, the LCD 18, and the buzzer 19 is controlled, and R
The AM 21 stores necessary data and maps.

FIG. 3 shows an example of display contents displayed on the above-mentioned LCD 18 (display means). The LCD 18 shows map information (road map) read from the map memory 17 and own vehicle position a (own vehicle A). , The guidance route, and the traffic congestion position b as indicated by the white arrow. FIG. 5 shows a data format of a request signal α transmitted from a vehicle on the information receiving side, that is, the own vehicle A (see FIG. 4). The request signal α includes a start bit 22, an own vehicle ID bit 23, and an information signal β ( (See FIG. 6) An area designation type bit 24 for designating an area to be obtained, an area designation bit 25 for designating a coordinate point and the like, and a vehicle position information bit 26
And the direction bit 27 of the own vehicle, a route guidance path bit 28 which becomes a “1” signal during route guidance and becomes a “0” signal during non-route guidance, and includes, for example, a road number and a traveling direction of the vehicle. It is composed of a route guidance path traveling direction bit 29 and an end bit 30.

Here, the above-mentioned area designation type bit 24
Is a type bit for designating an area from which the information signal β (see FIGS. 4 and 6) is to be obtained. For example, it designates a specific area from which the information signal β is to be obtained among a large number of areas defined by thin lines in FIG. Or a designated type bit for designating a range within a predetermined radius centering on a pinpoint such as an intersection c, or for designating a specific part of a route guidance destination.
In addition, an area designating code (see area designating bit 25) is inserted into the above-mentioned request signal α so that the information signal β is obtained only from other vehicles on the designated area.

FIG. 6 shows a vehicle on the information providing side, that is, another vehicle X,
In the data format of the information signal β (that is, the response signal) returned from Y and Z (see FIG. 4), the information signal β includes a start bit 31 and a transmission source ID bit 32 (the own vehicle ID bit 23 shown in FIG. 5). ), A time bit 33, and a vehicle ID as a recognition bit for identifying the vehicle on the information providing side.
Bit 34, position information bit 35, vehicle speed bit 36
And a congestion bit 37 averaging the detected vehicle speed and automatically determined by the CPU 5, a traveling direction bit 38, and an end bit 39.

The GPS receiver 7 shown in FIG.
Gyro 8 and vehicle speed sensor 9
The present position detecting means for detecting the present position (see FIG. 4) is constituted. The CPU 5 shown in FIG. 2 controls the LCD 18 as a display unit to display a road map, the current position of the vehicle A, and the guidance route x (see FIG. 4) to the destination set by the guidance route setting unit 16. Based on the means (the CPU 5 itself) and the information signal β received from the other vehicle X on the above-mentioned route guidance route (particularly, see the traffic jam bit 37 shown in FIG. 6), it is determined whether or not there is a traffic jam on the guidance route x. Guidance route traffic jam detection means to be detected (refer to the second step S2 in the flowchart shown in FIG. 9), and a case where traffic jam is detected on the aforementioned guidance route x (YES in the second step S2)
Based on the road map information stored in the map memory 17, two or more (two in this embodiment) detour routes y and z (see FIG. 4) detouring the above-mentioned traffic congestion point are referred to. A detour path detecting means for detecting and setting a predetermined number (see the fifth step S5 in the flowchart shown in FIG. 9) and an information signal received from other vehicles Y and Z on the detour paths y and z (particularly shown in FIG. 6) A detour-route congestion detecting means (10th in the flowchart shown in FIG. 9) for detecting whether or not there is congestion on these detour routes y and z based on the congestion bit 37.
Step S10) and a transmission / reception directivity setting unit (see step S6 in the flowchart shown in FIG. 9) that sets the directivity of the transmission / reception antenna 2 in the direction of the guidance route x or the detour routes y and z. .

The operation of the thus configured vehicle navigation apparatus and the method of setting a detour route will be described below. First, the storage operation processing of the CPU 5 in the vehicle 1 (the own vehicle A in this embodiment) that issues the request signal α will be described with reference to the flowchart of FIG.

In the first step U1, the CPU 5 determines whether or not a GPS signal has been received at predetermined time intervals, for example, every 5 seconds, based on the input from the GPS receiver 7, and if NO, skips to the fourth step U4. On the other hand, when the determination is YES, the process moves to the next second step U2. In this second step U2, the CPU 5 calculates the current position based on the received GPS signal, and in the next third step U3, the CPU 5 stores the calculated current position in the RAM 21.

Next, in a fourth step U4, the CPU 5 determines whether or not a predetermined short time, for example, three seconds, has elapsed. When the determination is NO, the CPU 5 skips to the eighth step U8, while YES
When the determination is made, the process proceeds to the next fifth step U5. This fifth
In step U5, the CPU 5 calculates the vehicle speed V based on the input from the vehicle speed sensor 9, and in the next sixth step U6, the CPU 5
Numeral 5 calculates the traveling direction based on the input from the gyro 8.

The processing in the fifth and sixth steps U5 and U6 is performed when a GPS signal from a GPS satellite is not sufficiently obtained (for example, when the vehicle is traveling in a tunnel).
This is autonomous navigation processing to supplement this. Next, in a seventh step U7, the CPU 5 obtains the current position from the vehicle speed V and the traveling direction as the above-described calculation results, and stores the three of the vehicle speed V, the traveling direction, and the current position in the RAM 21.

Next, in an eighth step U8, the CPU 5 determines whether or not a predetermined time, for example, one minute has elapsed. When the determination is NO, the CPU 5 skips to a fourteenth step U14, while the YE
When the determination is S, the process proceeds to the next ninth step U9. In the ninth step U9, the CPU 5 determines that the vehicle speed V is 1.5 km, for example.
/ h is determined, and if the determination is NO, the process proceeds to the thirteenth step U13. If the determination is YES, the process proceeds to the next tenth step U10.

In this tenth step U10, the CPU 5 determines whether or not the determination of V <1.5 Km / h has continued a predetermined number of times, for example, five or more times.
13 and if YES, the next eleventh step U
Move to 11. The ninth and tenth steps U9, U
Since there is a possibility that an error is possibly included in the determination based on the predetermined value of 1.5 km / h and the five times at 10, smoothing control is performed.

In the above-mentioned thirteenth step U13, the CPU 5
In step U11, the CPU 5 determines whether the determination of V <1.5 Km / h is a predetermined number of times, for example, five consecutive times. That is, the process in the eleventh step U11 is for smoothing the process. When the NO determination is made in the eleventh step U11 (for example, six or more consecutive times), the fourteenth step U11
The process skips to step S14 and moves to the next twelfth step U12 when YES is determined.

In the twelfth step U12, the CPU 5 responds to the determination that V <1.5 km / h has been made five times,
It is determined that there is a traffic jam and stored in the RAM 21. In other words, this corresponds to setting the traffic jam bit 37 in FIG. Next, in a fourteenth step U14, the CPU 5 determines whether or not a return signal (information signal β) set by the request signal α has been received. Sometimes the next fifteenth step U1
Move to 5.

At this fifteenth step U15, the CPU 5 determines whether or not a transmission signal from another vehicle (this signal is a transmission signal from another vehicle which does not respond to the request signal α) is received. When the determination is YES, the process proceeds to the sixteenth step U16, and when the determination is NO, the process proceeds to the seventeenth step U17.

In the above-described sixteenth step U16, the CPU 5
Stores the data of the received signal in the RAM 21 and
In step U17, the CPU 5 determines whether or not there is data in the RAM 21 for a predetermined time, for example, five minutes or more. When the determination is NO, the process returns. On the other hand, when the determination is YES, the process shifts to the eighteenth step U18. In the eighteenth step U18, the CPU 5 clears the data in the RAM 21 five minutes or more ago.

In short, the processing in the flowchart of FIG. 7 is to update and store all the received information in the RAM 21. Based on the sequentially updated data, for example, the traffic congestion position b as shown by a white arrow in FIG. , The own vehicle position a can be visually displayed. Next, referring to the flowchart shown in FIG. 8, the information providing side (the other vehicle X, Y, Z side)
Will be described.

In the first step R1, the CPU 5
(See FIG. 4 for other vehicles X, Y, and Z) to determine whether the request signal α from the vehicle A has been received.
Move to 2. In the second step R2, the CPU 5 determines whether or not a reply is possible, that is, whether or not to return the information signal β. Next, in a third step R3, the CPU 5 determines whether or not a reply is possible (reply OK). When the determination is NO, the CPU 5 returns to the first step R1. When the determination is YES, the CPU 5 shifts to the next fourth step R4.

In the fourth step R4, the CPU 5 creates a return signal (information signal β). At the time of this creation, if the request signal α includes an ID stored in the RAM 21 (see the own vehicle ID bit 23 in FIG. 5), the vehicle X, Y, Z
(See the vehicle ID bit 34 in FIG. 6) can be inserted into the return signal (information signal β).

Next, in a fifth step R5, the CPU 5 sets the timing (return timing of the information signal β) and the intensity (electric field strength of the information signal β), respectively, and returns the return signal (the transmission signal 4 via the transmitting circuit 4 and the antenna 2). The information signal β) is returned to the vehicle A. Next, a detour route search process and a detour route display process on the host vehicle A will be described with reference to the flowchart of FIG.

In the first step S1, the CPU 5 transmits the request signal α and receives the information signal β. In this case, the directivity of the transmitting and receiving antenna 2 is set in the direction of the guide route x input and set by the guide route setting means 16 in advance. Next, in a second step S2, the CPU 5 sets the guidance route x
Based on the information signal β received from the other vehicle X on the road, above all, the content of the congestion bit 37 (see FIG. 6), this guidance route x
It is detected whether or not there is a traffic congestion above, and when the determination is NO (when there is no traffic congestion), the process returns to step S2, while the YE
At the time of S determination (when there is congestion), the next third step S3
Move to

In the above-described third step S3, the CPU 5 notifies the occupant that there is traffic congestion on the guidance route x. In this case, the LCD 18 may display characters indicating that there is a traffic jam,
Voice guidance means such as a speaker (not shown) may be used to notify by voice that there is traffic. Next, the fourth step S
4, the CPU 5 operates the detour operation switch (FIG. 1 <
It is determined whether or not the manual switch 15 shown in FIG. 2 has been turned ON. If the determination is NO, the process returns to the above-described second step S2.
Move to step S5.

In the fifth step S5, the CPU 5 sets the detour routes y and z for detouring the congested point on the guide route x on the basis of the road map information stored in the map memory 17 by two.
Set the route. In this embodiment, two detour paths y and z are set, but one or three or more detour paths may be set. Next, in the sixth step S6, the CP
U5 forms these two detour paths y and z as setting areas,
The directivity of the antenna 2 is directed to the setting area so as to cover the setting area with the directivity of the antenna 2.

Next, in a seventh step S7, the CPU 5 transmits the request signal α to the other vehicles Y and Z on the detour paths y and z via the transmission circuit 4 and the antenna 2. Next, in an eighth step S8, the CPU 5 determines whether or not a response signal, that is, the information signal β, from the other vehicles Y and Z has been received within a predetermined time. When the determination is NO, the process skips to the tenth step S10, while YES. When the determination is made, the process proceeds to the next ninth step S9.

In the ninth step S9, the CPU 5 determines whether or not there is congestion on both the detour paths y and z based on the information signal β, and determines that there is no congestion on both the detour paths y and z. Sometimes the process proceeds to the next tenth step S10,
When it is determined that there is traffic congestion on both the detour routes y and z, the process proceeds to another eleventh step S11. The tenth mentioned above
In step S10, the CPU 5 determines that the detour route y,
The detour route having the shorter required route of z (the detour route z in FIG. 4 in this embodiment) is displayed on the screen of the LCD 18. When only one of the two detours y and z is congested, another detour that is not congested may be set and displayed on the LCD 18.

On the other hand, in the above-mentioned eleventh step S11,
In response to both detours y and z being congested, C
The PU 5 sets the next detour path by a predetermined number (for example, two paths), and then returns to the above-described sixth step S6. As described above, first, the presence or absence of traffic congestion on the guide route x is determined, the detour routes y and z are set at the time of traffic congestion, and the presence or absence of congestion on the set detour routes y and z is determined. When there is no congestion, the detour route is displayed on the screen, so that the detour route for detouring the congestion can be set and displayed immediately.

In short, according to the vehicular navigation apparatus of the above embodiment, the current position detecting means (see the GPS receiver 7, the gyro 8, the vehicle speed sensor 9) detects the current position of the own vehicle A, and the storing means (map) The memory 17 stores road map information, the guide route setting means 16 sets a guide route x to the destination of the vehicle A, and a display means (LCD 18).
The control means (see CPU 5) causes the display means (see LCD 18) to display the road map, the current position and the guidance route x, while the receiving means (see antenna 2 and receiving circuit 3) displays the necessary information. The information signal β transmitted from the other vehicles X, Y, and Z is received.

The guidance route traffic congestion detecting means (refer to the second step S2) is based on the information signal β received from the other vehicle X on the route guidance route set by the guidance route setting means 16 and congested on the guidance route x. Is detected, and if there is traffic congestion on the guide route x, the detour route detecting means (refer to the fifth step S5) is based on the road map information stored in the storage means (refer to the map memory 17). The detour routes y and z bypassing the congested point are detected.

Then, based on the information signals β received from the other vehicles Y and Z on the detour routes y and z, the detour route traffic congestion detecting means (refer to the ninth step S9) causes congestion on the detour routes y and z. The control means (see CPU 5) detects whether or not there is any traffic, and when it is detected that there is no congestion on the detour paths y and z, the control means (when the number of detour paths is two, the shorter required path is used) Path z) is displayed on the above-mentioned display means (see LCD 18). As a result, there is an effect that the detour route can be quickly set and displayed in the inter-vehicle communication.

In addition, the traveling direction detecting means (see gyro 8) detects the traveling direction of the vehicle A in preparation for setting the directivity.
The receiving directivity setting means (refer to the sixth step S6) sets the directivity of the receiving means (refer to the antenna 2 and the receiving circuit 3) in the direction of the guide route x or the detour routes y and z. For this reason, there is an effect that the information (the presence or absence of traffic congestion) of the area (direction) for which information acquisition is requested can be obtained in a good and prompt manner.

The transmission means (see the antenna 2 and the transmission circuit 4) for transmitting the request signal α is provided. The transmission means transmits the request signal α to obtain the information signal β from the other vehicles X, Y and Z. Therefore, the timing of obtaining information can be improved. That is, there is an effect that the information signal β can be obtained accurately at the time of the information obtaining request.

Further, the transmission directivity setting means (sixth embodiment)
Step S6) is the guidance route x or the detour routes y, z
, The directivity of the transmission means (see the antenna 2 and the transmission circuit 4) is set, so that the request signal α can be reliably transmitted to other vehicles X, Y, and Z existing in the area (direction) where information acquisition should be requested. There is an effect that can be transmitted.

Further, an area designating code (see the area designating bit 25 in FIG. 5) is inserted into the request signal α to obtain the information signal β only from the other vehicles X, Y and Z in the area. There is an effect that the information signal β can be obtained only from within the necessary area. For example, it is possible to prevent unnecessary information signals from becoming noise from another vehicle existing outside the area, and to obtain the S of the information to be obtained. The / N ratio can be improved.

Further, since the above-mentioned detour path detecting means (refer to the fifth step S5) sets two or more detour paths y and z, even if one set detour path is temporarily congested. Therefore, there is an effect that a detour path without traffic congestion can be set within a short time.

On the other hand, according to the detour route setting method of the above embodiment, the current position detecting means (see the GPS receiver 7, the gyro 8, the vehicle speed sensor 9) detects the current position of the vehicle A,
The storage means (see the map memory 17) stores road map information, the guide route setting means 16 sets the guide route x to the destination of the vehicle A, and the display means (see the LCD 18) visually displays necessary information. The control means (see CPU 5) causes the display means (see LCD 18) to display the road map, the current position, and the guidance route x.

Then, based on the information signal β received from the other vehicle x on the route guidance route, it is first detected whether or not there is a traffic jam on the guidance route x. Is detected, a detour route y, z that bypasses the congested point is detected based on the road map information stored in the storage means (see the map memory 17), and then the detour routes y, z are detected. Based on the information signal β received from the other vehicles Y and Z on z, it is detected whether or not there is congestion on the detour routes y and z. If there is no congestion on the detour routes y and z, The control means (see CPU 5) causes the display means (see LCD 18) to display a screen of this detour path (the detour path z having the shortest required path when there are a plurality of detour paths). For this reason,
In the inter-vehicle communication, there is an effect that the detour route can be set early and displayed immediately.

In correspondence between the configuration of the present invention and the above-described embodiment, the current position detecting means of the present invention is the same as that of the embodiment.
Corresponds to PS receiver 7, gyro 8, vehicle speed sensor 9,
Similarly, the storage means corresponds to the map memory 17, the display means corresponds to the LCD 18, and the control means corresponds to the CPU 5.
And the receiving means corresponds to the antenna 2 and the receiving circuit 3, and the guidance route traffic jam detecting means corresponds to the second
Corresponding to step S2, the detour route detecting means corresponds to a fifth step S5 under CPU control, and the detour route congestion detecting means corresponds to a ninth step S9 under CPU control,
The own vehicle (own moving object) corresponds to own vehicle A, the other vehicle (other moving object) corresponds to other vehicles X, Y, and Z, the traveling direction detecting means corresponds to gyro 8, and The directivity setting means and the transmission directivity setting means correspond to the sixth step S6, the transmission means corresponds to the antenna 2 and the traveling circuit 4, and the area designation code corresponds to the area designation bit 25 (see FIG. 5). However, the present invention is not limited only to the configuration of the above-described embodiment.

For example, the medium used for communication may be a semiconductor laser LD or a light emitting diode L in addition to a medium that effectively uses a frequency like the request radio signal disclosed in the embodiment.
Laser communication (optical communication) that spatially propagates an ED light wave may be used, or means for communicating a signal from a moving object (vehicle) via a GPS satellite may be used. Communication by sound waves may be used.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing a navigation system of the present invention.

FIG. 2 is a control circuit block diagram showing a vehicle navigation device of the present invention.

FIG. 3 is an explanatory diagram showing an example of a display on an LCD.

FIG. 4 is an explanatory view of the operation of the vehicle navigation device of the present invention.

FIG. 5 is an explanatory diagram showing a data format of a request signal.

FIG. 6 is an explanatory diagram showing a data format of an information signal.

FIG. 7 is a flowchart showing CPU storage operation processing of the information receiving vehicle.

FIG. 8 is a flowchart showing a signal returning process of the information providing vehicle.

FIG. 9 is a flowchart showing a detour route setting method of the present invention.

FIG. 10 is a diagram corresponding to claims.

[Explanation of symbols]

 A: own vehicle (own mobile) X, Y, Z: other vehicle (other mobile) α: request signal β: information signal 1: vehicle 2: antenna 3: receiving circuit 4: transmitting circuit 5: CPU (control means) 7) GPS receiver 8 ... Gyro (traveling direction detecting means) 9 ... Vehicle speed sensor 16 ... Guide route setting means 17 ... Map memory (storage means) 18 ... LCD (display means) 25 ... Area designation bit S2 ... Guide route congestion Detecting means S5: Detour path detecting means S6: Directivity setting means S9: Detour path traffic jam detecting means x: Guidance path y, z: Detour path

Claims (7)

[Claims] A current position detecting means for detecting a current position;
Storage means for storing a road map, guidance route setting means for setting a guidance route to a destination, display means for visually displaying necessary information, and control for displaying the road map, current position and guidance route on the display means Means for receiving an information signal transmitted from another vehicle, and congestion on a guidance route based on an information signal received from another vehicle on the route guidance route. A guide route traffic congestion detecting means for detecting whether or not there is a traffic route, and a detour route for bypassing the traffic congestion location based on a road map stored in the storage means when a traffic congestion is detected on the guide route. A detour path detecting means for detecting, and a detour path congestion detecting means for detecting whether there is congestion on the detour path based on an information signal received from another vehicle on the detour path, Control means for a vehicle navigation system to be displayed on said display means a detour route when there is no traffic congestion on the detour route is detected. 2. The vehicle according to claim 1, further comprising a traveling direction detecting means for detecting a traveling direction of the host vehicle, wherein said receiving means has a predetermined directivity, and said receiving means has a directivity of said receiving means in a direction of said guide route or detour route. 2. The vehicular navigation device according to claim 1, further comprising a reception directivity setting means for setting the directivity. 3. The vehicular navigation apparatus according to claim 1, further comprising transmitting means for transmitting a request signal, wherein the transmitting means transmits the request signal to obtain an information signal from another vehicle. 4. The transmission means has a predetermined directivity, and the transmission means includes transmission directivity setting means for setting the directivity of the transmission means in the direction of the guidance route or the detour route. The vehicle navigation device according to any one of the preceding claims. 5. The vehicle navigation apparatus according to claim 3, wherein an area designating code is inserted into the request signal to obtain an information signal only from another vehicle on the area. 6. The detour path detecting means detects the detour path as 2
The vehicle navigation device according to claim 1, wherein a predetermined number of routes or more is set. 7. A current position detecting means for detecting a current position;
Storage means for storing a road map, guidance route setting means for setting a guidance route to a destination, display means for visually displaying necessary information, and control for displaying the road map, current position and guidance route on the display means Means for detecting whether there is congestion on the guidance route based on an information signal received from another vehicle on the route guidance route, and then detecting traffic congestion on the guidance route. When it is detected that there is a detour, after detecting a detour that bypasses the congested point based on the road map stored in the storage unit, the detour is performed based on an information signal received from another vehicle on the detour. It detects whether there is congestion on the route, and when it is detected that there is no congestion on the detour route,
A detour path setting method in which the control means displays the detour path on a display means.