JP2681266B2 - 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 a vehicle running guide device as described above, for example, JP-A-57-46112 and JP-A-5-46112.
As described in Japanese Patent Publication No. 7-206819, it is known that running guidance is performed by displaying a current position and a running locus on a map shown on a display such as a cathode ray tube. However, in these conventional travel guidance devices, for example, when it is necessary to go to an intersection and turn at an intersection on the displayed map,
There is a problem that it is not possible to reliably judge whether the intersection just before is the same as the intersection on the map. Therefore, there may be a case where the person has passed an intersection where he or she should make a turn, or who may be anxious even though the intersection is actually turned accurately. To solve the above problems, for example, when a predetermined distance is approached to a predetermined intersection or the like, an actual image of the intersection or the like is displayed, The actual image of the intersection or the like should be surely recognized. However, when a predetermined intersection is approached by a predetermined distance, the image is switched to an actual image, and if the image is fixed, there is a problem that the position of the own vehicle cannot be grasped on a global scale. SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle running guidance device capable of easily performing reliable recognition of a predetermined intersection or the like and global recognition of the vehicle position. In order to achieve the above-mentioned object, a traveling guide device for a vehicle of the present invention comprises a display means for displaying information for guiding the traveling of the vehicle and a current position of the vehicle. A current position detecting means for detecting the intersection, a means for storing detailed information on the intersection of the map and the intersection, and a control means for displaying the detailed information on the intersection at the intersection when the vehicle is within a predetermined distance from the intersection. And a first switching means for stopping the display of the detailed intersection information and forcibly switching to the map display within a predetermined distance. The detailed intersection information corresponds to a plurality of approach directions of the intersection. It is detailed information, and the control means is characterized by having a calculation means for calculating the approach direction of the vehicle to the intersection. In the present invention thus configured, when the vehicle is within a predetermined distance from the intersection, the detailed display information of the intersection is displayed on the display means. This detailed intersection information is detailed information corresponding to a plurality of approaching directions of the intersection, and the calculating means calculates the approaching direction of the vehicle to the intersection. However, even if the vehicle is within a predetermined distance from the intersection, when the map display is necessary by the first switching means, the display of the detailed intersection information is stopped and the original map display is forcibly switched. . Further, the present invention preferably further comprises second switching means for forcibly switching the map display switched by the first switching means to the display of detailed intersection information within a predetermined distance. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a vehicle running guide device according to a preferred embodiment of the present invention will be described 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 FIG. 1, reference numeral 1 denotes a control circuit, which is preferably composed of a microcomputer, and which is connected to a central processing circuit (CPU) 2 and this CPU 2, and the calculation procedure and various operations of the CPU 2 are performed. Read-only memory (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 loaded with both a normal compact disc 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. The CD-ROM 11 has information necessary for guiding the vehicle, that is, a division map (see FIG. 4).
The whole map and the actual images of major intersections are stored in advance digitally. In this CD-ROM 11,
Other tourist guides, start-up inspection procedures, tire replacement procedures, handling information such as how to wear tire chains, etc. are digitally stored in advance as image information and audio information. Also, the decoder 7 is a C that is reproduced by the CD player 8.
It is determined whether the data in the D-ROM 11 is audio information or image information. When the data is image information, the data is sent to the audio device AU as it is. When the data is image information, the data is sent to the control circuit 1. It serves to supply via the input / output interface 5. A display control circuit 12 is connected to the output side of the input / output interface 5. The display control circuit 12 includes a display 13 such as a cathode ray tube or a liquid crystal display, and a video memory 14 which is a video display ram. It is connected. The control circuit 1 receives data on the current position of the vehicle from the current position recognition device 6 and data on the destination from the operation switch 10, and based on these data, according to the current position, a predetermined point, for example, a predetermined distance from a predetermined intersection. Outside, the map data, and within a predetermined distance the image data of the intersection, the CD loaded into the CD player 8
-Read from ROM 11. This data is temporarily stored in RAM
4 is stored. The control circuit 1 further creates a map corresponding to the current position based on the data once stored in the RAM 4, and shows the video data in which the current position and the traveling locus are superposed, or the image of the predetermined point. Video data is created and these video data are output to the display control circuit 12. The display control circuit 12 writes the video data in the video memory 14 and displays the contents of the video memory 14 on the display 13. It should be noted that when the image on the display 13 is enlarged, the operation switch 1
Perform by 0. In order to switch from the intersection image display to the map locus display and from the map locus display to the intersection image display within a predetermined distance range from the predetermined intersection, on the front surface of the display unit 13, that is, on the screen. Is provided with a screen switch 19. The screen switch 19 is composed of a large number of pairs of light emitting elements 21 and light receiving elements 22 arranged around the display 13 as shown in FIG. This screen switch 19 allows the light-emitting element 2 to be operated when the passenger touches the screen of the display 13 with a finger.
It emits a signal when the light from 1 is interrupted. Upon receiving this signal, the control circuit 1 switches from the intersection image display to the map trajectory display, or from the map trajectory display to the intersection image display. Next, an example of the display control of the control circuit 1 will be described in more detail with reference to the flowchart of FIG. In this display control, an actual image of intersections at a plurality of predetermined points on this map such as the map shown in FIG. 4 and the stereoscopic image shown in FIG. 5 is stored in advance in the CD-ROM 11. The description will be made assuming that they are automatically switched or displayed. As for the image of the intersection, different images are stored depending on the approach direction to the intersection, that is, four images are stored in the case of, for example, a crossroad. In the display control, first, the CD-ROM 1
The map 20 (see FIG. 4) corresponding to the current location is read from 1, and the map 20 and the traveling locus 21 of the vehicle on the map 20 are displayed on the display 13. After that, the current position is recognized based on the signal from the current position recognizing device 6, then the intersection is searched, and then it is determined whether or not there is an intersection in the vicinity of the current position, and when the determination is YES. , Calculate the distance between the current location and the intersection and the approach direction to the intersection. Next, it is determined whether the distance to the intersection is within a predetermined distance (indicated by a broken line circle 22 in FIG. 4), for example, 200 m. If this determination and the determination of whether there is an intersection in the vicinity are NO, after performing the map locus display means, the process returns to the current position recognition step. On the other hand, when the determination is YES within the predetermined distance, it is determined whether or not the screen of the display 13 is touched based on the signal from the screen switch 19, and when the determination is YES, the previous display is the map trajectory. If it is YES, the intersection image is displayed. On the other hand, if it is NO, the map trajectory is displayed, and the process returns to the step of recognizing the present location. Further, when the judgment of the screen touch is NO, it is judged whether or not there was a screen touch last time. When the judgment is YES, it is as it is, and when the judgment is NO, the image of the intersection is displayed.
The routine is repeated by returning to the step of recognizing the present location. As described above, according to the vehicle travel guidance apparatus of the present invention, when the vehicle is within a predetermined distance from the intersection, even if the detailed intersection information is displayed, the intersection details will be displayed. Since the display of information can be stopped and the display can be forcibly switched to the map display, it is possible to easily grasp the global position of the own vehicle and recognize the intersection.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a vehicle running guidance device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a screen switch. FIG. 3 is a map track display and an intersection image display by a control circuit. Flowchart showing an example of control [Fig. 4] Diagram showing an example of map trajectory display [Fig. 5] Diagram showing an example of intersection image display [Description of symbols] 1 Control circuit 6 Current position recognition device 8 CD player 10 Operation switch 11 CD-ROM 13 Display 20 Screen switch

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Hitoshi Ando               2610 Pioneer in Hanazono 4, Tokorozawa-shi, Saitama               In the Tokorozawa factory                (56) References JP-A-61-95386 (JP, A)                 JP 62-79312 (JP, A)                 JP-A-61-251890 (JP, A)                 JP-A-59-216016 (JP, A)

Claims (1)

(57) [Claims] Display means for displaying information for guiding the running of the vehicle, current position detecting means for detecting the current position of the vehicle, means for storing detailed information of the intersection of the map and the intersection, and a predetermined distance of the vehicle from the intersection. Control means for displaying the detailed intersection information of this intersection on the display means and the detailed intersection information of the intersection within the predetermined distance.
Stop displaying information and forcibly switch to map display 1st
Switching means , the detailed intersection information is detailed information corresponding to a plurality of approach directions of the intersection, the control means has a calculating means for calculating the approach direction of the vehicle to the intersection And a vehicle driving guidance device. 2. Furthermore, the map chart switched by the first switching means.
Indicate the intersection detailed information again within the predetermined distance
Second switching means for forcibly switching to the display of
The vehicle travel guidance device according to claim 1 .