JPH06187594A - Travelling position display device in vehicle - Google Patents

Abstract

PURPOSE:To record a map on a recording medium by digital information, to share the device by reading out the recording medium by an audio reproducing device, and decrease the cost in the vehicle with an audio reproducing device capable of reading out PCM audio signals mounted. CONSTITUTION:The vehicle with a digital audio reproducing device 7 which reproduces a recording medium 8 recording PCM audio signals mounted is provided with a distance detecting device 2 which detects the travelling distance of a vehicle, direction detecting device 3 detecting the progressive direction of the vehicle, digital information recording medium 8 recording maps previously by digital information and reading the digital information by device 7, signal processor 1 obtaining the position on the secondary coordinate of the vehicle based on the output signal of the distance detecting device 2 and the output signal of the direction detecting device 3 and preparing maps based on the map information read out by the device 7, and display device 5 displaying the map and the position of the vehicle on the screen by the output of the signal processor 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle running position display device. For more details, see CR in automobiles.
A computer system having a display device such as a T display and the like, a function of measuring a travel route of an automobile and the like, and a function of creating a map having map information is provided, and the map and the travel route are simultaneously displayed on the screen of the display device. The present invention also relates to a traveling position display device in a vehicle, which is also displayed so that the traveling position of the automobile or the like can be known on a map.

[0002]

2. Description of the Related Art In recent years, it has been demanded to collect information on the position of a vehicle for traffic control as the road becomes complicated, and a vehicle position monitor device is proposed in Japanese Patent Publication No. 57-25764. . This vehicle position monitoring device
The position of a vehicle within an arbitrary geographical area is displayed on a map at a base station for traffic control.

On the other hand, when a vehicle travels in a non-guidance area, a driver's seat is provided in advance so as to provide appropriate guidance so that the driver does not get lost from the course scheduled to travel. There has been proposed a device for displaying the current position of the vehicle on a road map. Conventionally, in this type of travel position display device, a transparent sheet on which a road map is printed is separately prepared according to the travel area, and the travel route is preliminarily aligned and stretched on the screen of the display device. Is generally configured so that the traveling position of the vehicle can be confirmed.

[0004]

According to the traveling position display device having such a structure, when the traveling position of the vehicle becomes an area outside the area of the map displayed by the adjusted seat, the traveling position is displayed. The sheet has to be replaced each time, and when the sheet is replaced, further alignment must be performed, which has a drawback that the handling becomes extremely complicated. The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a traveling position display device which is easy to handle and can obtain high reliability.

[0005]

According to a first aspect of the present invention, there is provided a vehicle traveling position display device equipped with a digital audio reproducing device capable of reproducing a recording medium on which a PCM audio signal is recorded. Then, a distance detector for detecting the traveling distance of the vehicle, an azimuth detector for detecting the traveling direction of the vehicle, a map is recorded in advance as digital information, and the digital information can be read by the digital audio reproducing device. The position of the vehicle on the two-dimensional coordinates is obtained based on the storage medium, the output signal of the distance detector and the output signal of the azimuth detector, and a map is obtained based on the map information read by the digital audio reproducing device. And a display device for displaying the map and the position of the vehicle on the screen by the output of the signal processing device. A summary to have.

The traveling position display device for a vehicle according to the invention described in claim 2 is based on the traveling position display device according to claim 1, and the signal processing device is provided on a plurality of screens from the digital audio reproducing device. It is configured to temporarily store the corresponding map information.

[0007]

According to a first aspect of the present invention, there is provided a traveling position display device for a vehicle, wherein information recorded in a digital information storage medium is read by a digital audio reproducing device, and signal processing is performed based on the information and the outputs of both detectors. The device creates a map and position information of the vehicle on the map and displays them on the screen of the display device. Therefore, the operation such as map replacement is unnecessary and the handling is easy. Since the digital audio reproducing device can be used to read the map information, the traveling position display device can be downsized as a whole, the number of parts can be reduced, and the cost can be reduced, and the mounted device can be effectively used as a vehicle.

Further, since the traveling position display device according to the second aspect of the invention can store map information corresponding to a plurality of screens, it is possible to collectively read out map information required when the vehicle is stopped, etc. Without disturbing listening to music,
In addition, map information can be input without being affected by the traveling vibration of the vehicle.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a basic configuration of a traveling position display device according to the present invention. Reference numeral 1 denotes a signal processing device. The signal processing device 1 is provided with a distance detector 2, an azimuth detector 3, and an operating device 4 on its input side, a display device 5 on its output side, and a traveling locus. A storage device 6 and a PCM digital audio reproduction device 7 as a reproduction device for a digital information storage medium for reading map information are provided.

The distance detector 2 is composed of, for example, a photoelectric, electromagnetic or mechanical contact type sensor which outputs a pulse signal proportional to the number of rotations of the wheel, and generates a signal corresponding to the traveling distance of the automobile. The azimuth detector 3 includes, for example, a rate-type gyroscope that detects an angular velocity in the yaw direction,
It outputs a signal proportional to the azimuth or the amount of azimuth change according to the traveling direction of the automobile. The traveling locus storage device 6 sequentially stores the data of the position on the two-dimensional coordinate which is obtained by the signal processing device 1 and changes every moment, and holds it as finite continuous position information corresponding to the current position of the automobile.

PCM digital audio reproducing device 7
Is mounted on a vehicle and reads and reproduces information recorded in a digital information storage medium 8 such as a compact disc. This reproducing device 7 is provided with a semiconductor laser and an optical system, and is configured to apply a laser beam to the above bits, extract reflected light from the recording surface, and receive it by a photodetector to read information. It also has a tracking function that tracks the bit string on the recording surface so that the laser beam does not come off, and an automatic focusing function that ensures that the information can be read out even when the surface shake occurs during the disk circuit. . FIG. 4 is a block diagram showing an example of the configuration of the reproducing apparatus 7. In FIG. 4, 8 is a compact disc, 25 is a focus servo circuit, and 26 is a tracking servo circuit.

The digital information storage medium 8 is composed of a compact disc that can be detachably attached to the PCM digital audio reproducing device 7 for exchange from the outside, and the information recorded by being mounted in the digital audio reproducing device 7 is read out. The compact disc 8 has a diameter of 120 m, for example.
A transparent disk such as acrylic resin of m has a recording surface, and information is recorded at a portion called "bit" of the recording surface. As described above, the information is read out using a laser beam in a non-contact manner. The compact disc 8 is equipped with a vehicle in which music information is recorded and in which a road map is digitized in pixel units in advance in a raster mode and recorded. In the traveling position display device of this embodiment, map information read from the compact disc 8 storing a road map is sent to the signal processing device 1.

The display device 5 is, for example, a CRT display, and displays the position information such as a map image, the current position of the vehicle, a running locus in a certain section up to the current position and the current traveling direction on the same screen every moment. Let The operation device 4 sends a display command to the signal processing device 1 by means of the operation switch group, and based on the operation of the signal processing device 1, changes the direction of the map and the traveling locus displayed on the display device 5, the movement of the display position, the map and It is possible to appropriately perform partial enlargement display of the traveling locus, change setting of display form such as selection of display scale factor, search of map and traveling locus, and display change.

According to the traveling position display device provided with the respective constituent devices having the above-described operations, the signal processing device 1 measures the traveling distance of the vehicle by the signal from the detector 2 and the azimuth detector 3 Is used to determine the traveling direction of the vehicle, the position on the two-dimensional coordinates of the vehicle for each unit traveled distance is calculated according to the detection signals from the detectors 2 and 3, and the PCM digital audio reproducing device 7 Information about a map is input to temporarily store information on a plurality of maps, the map and the traveling position of the vehicle on the map are displayed on the screen of the display device 5, and the current position of the vehicle is associated with the traveling of the vehicle. Select and display the map.

Here, since the compact disc 8 is mounted on the PCM audio reproducing device 7 and read by the reproducing device 7 when the vehicle is stopped, the map information can be obtained without any trouble in listening to music. In addition, the audio device can be shared, the cost can be reduced, and the number of parts can be reduced. In particular, since the signal processing device 1 can store maps corresponding to a plurality of screens and can read a plurality of maps at once, the map in the moving range of the vehicle can be accurately obtained without being affected by vibrations during traveling. Can be read.

FIG. 2 shows a concrete example of a traveling position display device constituted by a computer system, and its operation will be described in detail.

In this device, as described above, the compact disc 8 in which the image information of the map is recorded in advance in the raster mode as digital information in pixel units is set in the reproducing device 7, and the map number for designating the map near the present location is set. When input by the operation switch of the operation device 4, the image information of the map is read from the storage medium 8 by the reproduction device 7.
At this time, since the existing audio device can be used for reading the map information, the number of parts and the cost can be reduced, and the image information of a plurality of maps can be temporarily stored in the video RAM 9, so that the map information can be stored. It is not necessary to constantly drive the playback device 7 for reading, and it is also possible to collectively read necessary map information to avoid reading errors due to vibration and the like, and also to shorten the time required for map selection. Can be achieved.

Then, the map near the current position is displayed on the display device 5.
After that, a mark indicating the current position of the vehicle is displayed on the same screen of the display device 5 by operating the operation switch of the operation device 4, and the position on the map is determined in correspondence with the actual current position. . Further, by the same operation, a mark relating to the traveling direction of the automobile is also provided on the map on the same screen.

FIG. 3 shows an example of the map 10, the current position display mark 11, and the direction display mark 12 relating to the traveling direction of the automobile, which are displayed on the screen of the display device 5. The direction from the current position display mark 11 to the direction display mark 12 means the traveling direction of the automobile. In the above, if a detector capable of detecting an absolute azimuth, such as a geomagnetic compass, is used as the azimuth detector 3, initial setting of the direction display mark 12 is unnecessary.

As described above, when the vehicle starts to travel after the initial setting of the current position display mark 11 and the direction display mark 12 on the map on the screen of the display device 5, the distance detector 2 detects the unit traveling distance. One pulse signal is sent to the timing and address control circuit 13 every time, and the output of the azimuth detector 3 is sent to the data bus 15 via the A / D converter 14, and thus the signal processing device 1 is provided with a detector. A few outputs are input.

In the signal processing device 1, the traveling distance is measured by counting the number of pulses from the distance detector 2, and the output of the azimuth detector 3 determines the traveling direction of the automobile at every moment. Further, in the signal processing device 1, the current position (x, y) on the XY coordinates is obtained by calculation every moment based on the change of the mileage and the direction of the automobile according to the preset scale reduction ratio of the map. The calculation result is sequentially sent to the display device to continuously display the current position, and is also sent to the travel locus storage device 6 for storage and storage.

As described above, the signal processing device 1 includes the display device 5
It has a function of displaying the map 10, the current position display mark 11, the direction display mark 12, etc. on the screen to display the traveling position of the automobile.

The signal processing apparatus 1 according to the present invention responds to the output of the main CPU 16 which performs centralized control, the timing and address control circuit 13 which decodes the content instructed by the main CPU 16 and generates a timing signal, and the timing and address control circuit 13. ROM 17 for reading out a predetermined control program stored in advance and sending the data to the main CPU 16, RAM 18 for storing the data of the position on the XY coordinates according to the direction detection value and the distance detection value, The video RAM 9 for temporarily storing the graphic information of the position display mark 11, the direction display mark 12, the traveling locus display mark 19, and the image information of the map, the clock generation circuit 20 for sending a clock signal to the timing and address control circuit 13, the main CPU 16, and the like. Parallel connecting external Output and interrupt control circuit 2
1 and an address bus 22, a data bus 15 and the like.

Reference numeral 23 is a detector provided to detect the forward and backward movements of the vehicle. When the vehicle is moving backward, its detection signal is a parallel input / output and interrupt control circuit 21.
And the respective inputs from the distance detector 2 and the azimuth detector 3 in between are corrected. Reference numeral 24 denotes a switch encoding CPU that sends various command signals from the operating device 4 having an operation input switch group to the parallel input / output and interrupt control circuit 21.

In the configuration of the signal processing device 1 shown in FIG. 2, the traveling locus storage device 6 is included therein.

Although the contents of the present invention have been clarified from the above-mentioned embodiments, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that the design can be arbitrarily changed within the scope not departing from the gist. Is. For example, it is possible to display the map, the current position display mark, the direction display mark, the traveling route, etc. displayed on the display device 5 in different colors, and thus the visibility can be improved.

[0027]

As is apparent from the above description, claim 1
According to the invention described in (3), since the map information is stored in the digital information storage medium and the storage medium is mounted on the PCM audio reproducing device to read the map information, the PCM audio reproducing device is effectively used to reduce the number of parts. The effects of reduction, downsizing and cost reduction can be obtained.

According to the second aspect of the present invention, since the signal processing device is configured to be able to temporarily store the map information of a plurality of maps, there is no problem in listening to music and the vehicle is stopped. It becomes possible to take in the map information collectively at a time, and it is possible to exclude the adverse effects such as vibration during traveling when reading the map information.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of a traveling position display device.

FIG. 2 is a diagram of a specific example in which the traveling position display device is shown in the configuration of a computer system.

FIG. 3 is a diagram showing an example of a display state on a screen of a display device.

FIG. 4 is a block diagram showing an example of a configuration of a digital information storage medium reproducing apparatus.

[Explanation of symbols]

1 ... Signal processing device, 2 ... distance detector, 3 ... direction detector,
4 ... Operating device, 5 ... Display device, 7 ... PCM digital audio reproducing device (digital information storage medium reproducing device), 8 ... Compact disk (digital information storage medium), 9 ... Video RAM.

Claims (2)

[Claims] 1. A vehicle equipped with a digital audio reproducing device capable of reproducing a recording medium on which a PCM audio signal is recorded, the distance detector detecting a traveling distance of the vehicle, and a traveling direction of the vehicle. An azimuth detector, a digital information storage medium in which a map is recorded in advance as digital information, and the digital information can be read by the digital audio reproducing device; and an output signal of the distance detector and an output signal of the azimuth detector. And obtain the position of the vehicle in two-dimensional coordinates,
A signal processing device for creating a map based on the map information read by the digital audio reproducing device, and a display device for displaying the map and the position of the vehicle on the screen by the output of the signal processing device are provided. A traveling position display device in a vehicle characterized by the above. 2. The traveling position display device for a vehicle according to claim 1, wherein the signal processing device is configured to temporarily store map information corresponding to a plurality of screens from the digital audio reproducing device. A traveling position display device in a vehicle.