JP2764809B2 - Vehicle guidance system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a travel guidance device for a vehicle, and more particularly, to a vehicle guidance device for providing information necessary for travel guidance of an automobile or the like by an electronic device. The present invention relates to a travel guidance device. 2. Description of the Related Art As the above-mentioned traveling guidance device for a vehicle, for example, Japanese Unexamined Patent Publication No.
As described in Japanese Patent Application Laid-Open No. 7-46112 and Japanese Patent Application Laid-Open No. 57-206819, traveling guidance is performed by displaying the current position and traveling locus on a map shown on a display such as a cathode ray tube. Are known. However, such a vehicle travel guidance device merely displays the current position and travel trajectory on a display, and thus may be involved in traffic congestion or the like. Therefore, in the vehicle guidance system disclosed in JP-A-58-143370, traffic information is received and the degree of congestion is displayed in color on a map on a display device. This is not easy because the driver has to make the selection while looking at the map display, and it is inconvenient because the detour selected from the map may not be allowed to travel due to entry prohibited or the like. Accordingly, the present invention enables a driver to know a desired avoidance route (a detour) when there is traffic jam,
It is still another object of the present invention to provide a vehicular travel guidance device that enables a driver to travel on a travel route with peace of mind by visually recognizing a travel route including a congested road even when an avoidance route cannot be set. . SUMMARY OF THE INVENTION A traveling guidance device for a vehicle according to the present invention sets a traveling route to a destination and guides the vehicle to the destination. Storage means for storing, congestion recognition means for recognizing congested roads and directions of congestion, display means for displaying a road map and a traveling route, and congestion roads on the traveling route among congested roads recognized by the congestion recognition means. Avoidance route setting means for setting an avoidance route to be avoided, and when the avoidance route is set by the avoidance route setting means, the avoidance route is displayed on a road map. On the other hand, when the avoidance route is not set, traffic congestion occurs. Display control means for displaying a travel route including a road on a road map. [0005] In the vehicle guidance system according to the present invention, when the avoidance route is set by the avoidance route setting means, the display control means displays the avoidance route on a road map. On the other hand, when the avoidance route is not set, the driving route including the congested road is displayed on the road map, so that the driver knows a desired avoidance route (a detour) when there is congestion. In addition, even when the avoidance route cannot be set, the user can visually recognize the travel route including the congested road, so that the user can travel on the travel route with peace of mind. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle guidance system according to an embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing a vehicle travel guidance device according to an embodiment of the present invention. In this FIG.
Denotes a control circuit, and the control circuit 1 is preferably constituted by a microcomputer. A central processing circuit (CPU) 2, a read-only memory connected to the CPU 2 and storing the operation procedure and various constants of the CPU 2. (RO
M) 3, a random access memory (RAM) 4, and an input / output interface 5. The input / output interface 5 includes a current position recognizing device 6 which is a device for estimating and recognizing the current position of the vehicle based on geomagnetism, gyro, etc., a CD player 8 via a decoder 7, and an operation switch 10 via an encoder 9. It is connected. The CD player 8 can be filled with both a normal compact disk and a CD-ROM 11. Note that a cassette tape or the like can be used instead of the CD-ROM, but it is preferable to use a CD-ROM in terms of storage capacity and ease of handling. [0007] The CD-ROM 11 contains information necessary for driving guidance of the vehicle, that is, a division map (see FIG. 3).
And the entire map are digitally stored in advance. This C
In the D-ROM 11, other information such as a sightseeing guide, a start-up inspection procedure, a tire replacement procedure, how to put on a tire chain, and the like may be digitally stored in advance as image information and audio information. The decoder 7 determines whether the data in the CD-ROM 11 reproduced by the CD player 8 is audio information or image information. If the data is image information, the decoder 7 directly converts the data to the audio device A.
U and supplies the data to the control circuit 1 via the input / output interface 5 when the data is image information. The operation switch 10 functions as destination specifying means for a driver or the like to specify a destination in addition to the operation described later. When the control circuit 1 receives a data signal indicating a destination from the operation switch 10 acting as the purpose indicating means, it uses the data signal and the signal indicating the current position from the current position recognition device 6 to change the destination from the current position. Set the travel route to the ground. The input side of the input / output interface 5 further includes a traffic information collecting device 1.
The traffic information collection device 12 includes a communication device 13 for receiving traffic information and a traffic jam information recognition device 14 for recognizing and storing a traffic jam road from the received traffic information. I have. A display control circuit 15 is connected to the output side of the input / output interface 5. The display control circuit 15 includes a display 16 such as a CRT or a liquid crystal display, and a video as a video display ram. Memory 1
7 is connected. The control circuit 1 receives data relating to the current signal of the vehicle from the current position recognition device 6 and data relating to the destination from the operation switch 10, and based on these data sets a travel route to the destination and maps Is stored in the CD player 8
Read from the D-ROM 11. This data is
It is stored in M4. The control circuit 1 further creates a map 20 corresponding to the current position based on the data temporarily stored in the RAM 4 and sets video data obtained by superimposing the current position 21 and the traveling locus 22 or a setting to be superimposed on the map. Video data indicating the travel route is created, and the video data is output to the display control circuit 15. The display control circuit 15 writes the video data into the video memory 17 and stores the contents of the video memory 17 into the display 1.
6 is displayed. In addition, enlargement of the image on the display 16,
Switching or the like is performed by the operation switch 10. Next, a road network storage method by the control circuit 1,
A method for recognizing congested roads and searching for a detour will be described. Road network storage method As shown in FIG. 4, the road network stores the intersection number between the start point and the end point (in FIG. 4, the number is circled).
It is stored in the direction in which the vehicle can travel between them as indicated by the thin arrow. The state is shown in a table in FIG. The direction in which the vehicle can travel is determined by the CD-ROM 1 as a part of the intersection attribute data.
1, and when the intersection is not close to a straight line, an inflection point is set. Note that the bold arrow in FIG. 4 indicates a preset traveling route. Recognition of congested road Based on the received traffic information, the location of the congested traffic is recognized based on the intersection and the direction of the congested traffic. In the example of FIG. 6, the traffic congestion starts at the intersection and continues from →→→ (next segment map). The search Figure 7 detour shows an example of a detour search. In this example, since there is traffic congestion between the intersection and the intersection on the original traveling route, the detour is searched for. First, at the intersection,
Find an intersection where you can proceed. In this example, there is a toy, but it is a traffic jam. When an intersection that can be advanced from the next is searched, the intersection on the next segmented map is obtained. Here, since the next segmented map is closer to, a search is made with priority. From the intersection, proceed to
Is the end of the traffic jam, so choose. If it is not possible to proceed here, proceed to →, and the detour is →→→→ because the route is ahead of the traffic jam on the set route. In this way, a detour is searched as much as possible and displayed on the screen to provide travel guidance. Next, referring to the flowchart of FIG.
An example of a display related to traffic congestion of the control circuit 1 and an example of a control mode thereof will be described. In this control, it is first determined whether there is traffic congestion information, and if this determination is NO, a map is displayed and the control is terminated. When this determination is YES, it is determined whether or not the congestion is on the traveling route, and when this determination is NO, the congestion road is simply displayed on the map and the control is terminated,
On the other hand, if this determination is YES, it is determined whether the congestion is ahead of the set traveling route in the traveling direction. This judgment is Y
In the case of ES, a search for a detour is performed to determine whether there is a detour. When the determination is YES, the detour is displayed on the map, and the control is terminated. When the determination as to whether the vehicle is ahead of the traveling route or the determination as to whether there is a detour is NO, the congested road is displayed on the map, and the control is ended.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a vehicle travel guidance device according to an embodiment of the present invention. FIG. 2 is a flowchart showing an example of control of a display by a control circuit. FIG. FIG. 4 is an explanatory diagram for explaining a method for storing a road network; FIG. 5 is an explanatory diagram for explaining a method for storing a road network; FIG. 6 is a diagram for explaining a method for recognizing a congested road; Description diagram [Fig. 7] Description diagram for describing a method of searching for a detour [Description of reference numerals] 1 control circuit 6 current position recognition device 8 CD player 10 operation switch 11 CD-ROM 12 traffic information collection device 16 display

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kiyomi Suzuki 2610 Hanazono, Tokorozawa-shi, Saitama Prefecture Pioneer Corporation Tokorozawa Plant (56) References JP-A-56-74797 (JP, A) JP-A-58-143370 (JP, A) JP-A-62-54118 (JP, A) JP-A-61-131100 (JP, A) JP-A-60-256900 (JP, A) JP-A-58-223017 (JP, A) JP-A-58-52516 (JP, A) JP-A-60-84699 (JP, A) JP-A-59-108200 (JP, A) JP-A-50-121680 (JP, A) JP-A-59-85599 JP, A) JP-A-61-128799 (JP, U) JP-B-57-40710 (JP, B2) JP-B-53-78 (JP, B2) (58) Fields studied (Int. Cl. ⁶ , (DB name) G01C 21/00

Claims (1)

(57) [Claims] A vehicle guidance device that sets a traveling route to a destination and guides the vehicle to the destination; storage means for storing road map information; congestion recognition means for recognizing congested roads and directions of congestion; Display means for displaying the travel route; avoidance route setting means for setting an avoidance route for avoiding a congested road on the travel route among the congested routes recognized by the congestion recognition means; Display control means for displaying the avoidance route on the road map when the avoidance route is set, and displaying the travel route including the congested road on the road map when the avoidance route is not set; A travel guidance device for a vehicle, comprising: