JPH0735557A - Travel locus display device for vehicle - Google Patents

Abstract

PURPOSE:To confirm a travel direction even when a current position mark is scrolled beyond the range of a display screen by operating a travel route up to a current direction on a road map, and showing a travel direction at every preset travel distance. CONSTITUTION:A computer 2 detects the current position, travel direction, travel distance and speed of a vehicle, on the basis of each information from a travel speed sensor 1, a GPS receiver 3, a gyroscope 4 and an earth magnetism sensor 5. Also, the computer 2 matches a road map near the current position and a travel locus read out from a CD-ROM 6 with each other and computes a travel route, thereby showing the road map near the current position on a display 7. In this case, if the vehicle travels along the preset distance and locus display mode is activated, a vehicle position, a travel direction and a travel distance at every prescribed travel distance are read from a memory 2m. A locus mark display position is, then, shown along the travel route up to the current position on the road map. A direction and display color corresponding to the travel direction and speed are also determined and graphically shown respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle running locus display device for displaying a running locus of a vehicle on a road map.

[0002]

2. Description of the Related Art There is known a vehicle running locus display device for displaying a running locus of a vehicle on a road map and displaying a current position mark indicating a traveling direction of the vehicle at a current position of a tip end of the running locus. (For example, Japanese Patent Publication
3805 publication).

However, in the conventional vehicle running locus display device, since the traveling direction of the vehicle is displayed only at the current position of the tip of the running locus, the road map is displayed to the extent that the current position mark deviates from the display screen. When scrolling the display screen of, it is not possible to determine in which direction the vehicle was traveling by just looking at the traveling path.For example, when trying to determine the traveling route for the return route based on the traveling route for the outbound route, the vehicle goes to the one-way road. In some cases, it may hit you or you may not be able to smoothly enter the return highway.

It is an object of the present invention to provide a vehicle traveling locus display device for displaying a traveling direction of a vehicle for each predetermined traveling distance on a traveling route to a current position on a road map.

[0005]

The present invention will be described with reference to FIG. 1, which is a claim correspondence diagram, and the invention of claim 1 is a distance detecting means 100 for detecting a traveling distance of a vehicle.
Azimuth detecting means 101 for detecting the traveling direction of the vehicle, a map storing means 102 for storing a road map, and a distance detecting means 1
Map storage means 1 based on the traveling distance detected by 00 and the traveling direction detected by the direction detection means 101.
No. 02, the route calculation means 103 for calculating the traveling route to the current position on the road map, and the map storage means 1
A road map is read from 02 and displayed, and a display means 104 for displaying a trajectory mark indicating a traveling direction of the vehicle for each predetermined traveling distance is provided on the traveling route calculated by the route calculating means 103. To achieve the above objectives. Further, the invention according to claim 2 is provided with a speed detecting means 105 for detecting a traveling speed of the vehicle, wherein the trajectory mark indicates the traveling direction of the vehicle and the traveling speed of the vehicle detected by the speed detecting means 105 is indicated. It was done.

[0006]

According to the vehicle running locus display device of the present invention, the running route to the current position on the road map is calculated on the basis of the running distance and the traveling direction of the vehicle, and the running route is set for each predetermined running distance. A trajectory mark indicating the heading of the vehicle is displayed on. As a result, even if the road map display screen is scrolled to the extent that the current position mark deviates from the display screen, the traveling direction of the vehicle can be confirmed at a glance. Claim 2
In the vehicle traveling locus display device, the locus mark indicating the traveling direction and traveling speed of the vehicle is displayed on the traveling route of the vehicle on the road map for each predetermined traveling distance. As a result, even if you scroll the road map display screen to the extent that the current position mark deviates from the display screen, you can check the traveling direction of the vehicle at a glance, and you can also check the congestion point on the outbound path at a glance. A proper return route can be selected based on

[0007]

FIG. 2 is a block diagram showing the structure of an embodiment. The vehicle speed sensor 1 is attached to a transmission of a vehicle, for example, and generates a predetermined number of pulse signals per one rotation of the speedometer pinion. Computer 2
Calculates the traveling speed of the vehicle by detecting the number of pulses per unit time or the pulse cycle output from the vehicle speed sensor 1, and calculates the traveling distance of the vehicle by counting the number of pulses.

The GPS receiver 3 emits G emitted from the satellite.
It is a receiver that receives a PS positioning signal, and detects the current position and heading of the vehicle based on the received information. In the following, the detection of the current position and the heading by GPS will be performed by GP.
Called S positioning. The gyroscope 4 detects the turning angular velocity of the vehicle. Computer 2 is gyroscope 4
The turning angle of the vehicle is calculated based on the turning angular velocity detected by, and the turning angle is further integrated to calculate the traveling direction of the vehicle. Further, the geomagnetic sensor 5 detects the direction of geomagnetism. The traveling azimuth of the vehicle calculated based on the output of the gyroscope 4 is the azimuth obtained by adding the integrated value of the turning angle to the initially set azimuth, and the vehicle travels due to the initial setting error and the cumulative error. Error increases. Therefore, the traveling azimuth of the vehicle calculated based on the output of the gyroscope 4 is timely corrected by the accurate traveling azimuth of the vehicle detected by the GPS receiver 3 or the absolute azimuth detected by the geomagnetic sensor 5.

The CD-ROM 6 is a storage device for storing road map data. The computer 2 detects the current position, traveling direction, traveling distance and traveling speed of the vehicle based on various information input from the vehicle speed sensor 1, the GPS receiver 3, the gyroscope 4 and the geomagnetic sensor 5, and stores them in the memory 2m. At the same time, the traveling locus is calculated, the traveling locus is collated with the road map read from the CD-ROM 6 to perform map matching, and the traveling route to the current position on the road map is calculated. Computer 2 is also C
A locus showing the road map around the current position of the vehicle from the D-ROM 6 and displaying it on the display 7, and showing the traveling direction and the traveling speed of the vehicle for each predetermined traveling distance on the traveling route to the current position on the road map. Display the mark.

FIG. 3 is a flow chart showing a display control program of the computer 2. The operation of the embodiment will be described with reference to this flowchart. When the main switch (not shown) is turned on, the computer 2 starts executing this control program. In step S1 after the start of execution, the current position, traveling direction, traveling distance and traveling speed of the vehicle are detected based on various information input from the vehicle speed sensor 1, the GPS receiver 3, the gyroscope 4 and the geomagnetic sensor 5, and then continued. In step S2, the traveling locus of the vehicle is calculated. Further, in step S3, a road map around the current position of the vehicle is read out from the CD-ROM 6, and it is compared with the calculated traveling locus for map matching to calculate the traveling route of the vehicle on the road map.

In step S4, a road map around the current position of the vehicle is displayed on the display 7, and the process proceeds to step S5. In step S5, it is determined whether the vehicle has traveled a predetermined distance set in advance. If the vehicle has traveled the predetermined distance, the process proceeds to step S6, and if not, the process returns to step S1.
In step S6, it is determined whether or not the locus display mode is set by a display mode selector (not shown). If the locus display mode is set, the process proceeds to step S7, and if not, the process proceeds to step S8. In step S7,
The trajectory display routine shown in FIG. 4 is executed to display the trajectory mark on the traveling route on the road map.

In step S11 of FIG. 4, the position, traveling direction and traveling speed of the vehicle for each predetermined traveling distance are read from the memory 2m, and a trajectory mark is displayed on the traveling route up to the current position on the road map displayed on the display 7. The display position of is determined and the process proceeds to step S12. In step S12, the direction of the trajectory mark of the vehicle is determined according to the traveling direction of the vehicle, and in the subsequent step S13, the display color of the trajectory mark is determined according to the traveling speed of the vehicle. In step S14, a locus mark is drawn on the traveling route on the road map, and the process returns to the program of FIG. Step S8 of FIG. 3 after return
At, the current position mark is displayed at the current position on the road map, the process returns to step S1 and the above process is repeated.

FIG. 5 shows a display example of the traveling locus of the vehicle. At the current position of the vehicle, a current position mark 11 indicating the traveling direction of the vehicle at the current position is displayed, and on the travel route up to the current position, track marks 12 to
14 is displayed. The locus marks 12 to 14 are displayed in a color corresponding to the traveling speed of the vehicle at that position. The trajectory mark 12 has a traveling speed of 40 k / m or more, and the trajectory mark 13
Indicates that the traveling speed is 10 k / m or more and less than 40 k / m, and the locus mark 14 indicates that the traveling speed is less than 10 k / m. The mark 15 is a mark indicating a one-way road.

In this way, the traveling locus of the vehicle is calculated to identify the traveling route to the current position on the road map, and the traveling direction and traveling of the vehicle for each predetermined traveling distance are specified on the traveling route on the road map. In addition to displaying the trajectory mark indicating the speed and the current position of the vehicle at the current position, the current position mark indicating the heading of the vehicle at the current position is displayed. Even if the map display screen is scrolled, the traveling direction of the vehicle can be confirmed at a glance, and the optimal traveling route for the return route can be determined based on the traveling route for the forward traveling direction that is clear.
In addition, the location of the traffic jam on the outward route can be confirmed at a glance, and an appropriate return route can be selected based on this information.

In the configuration of the above embodiment, the vehicle speed sensor 1 and the computer 2 serve as distance detecting means and GPS.
Receiver 1, gyroscope 4 and geomagnetic sensor 5
Is the direction detecting means, and the CD-ROM 6 is the map storing means,
The computer 2 is the route calculation means, and the computer 2
The display 7 constitutes display means, and the vehicle speed sensor 1 and the computer 2 constitute speed detection means.

[0016]

As described above, according to the first aspect of the present invention, the travel route to the current position on the road map is calculated based on the travel distance and the traveling direction of the vehicle, and the predetermined travel route is set in the travel route. Since the locus mark that indicates the traveling direction of the vehicle is displayed for each mileage, even if you scroll the road map display screen to the extent that the current position mark deviates from the display screen, the traveling direction of the vehicle can be seen at a glance. It is possible to determine the optimum traveling route for the return route based on the traveling route for the forward route which can be confirmed by Further, according to the invention of claim 2, in the traveling route to the current position on the road map,
Since the locus mark indicating the traveling direction and the traveling speed of the vehicle is displayed for each predetermined traveling distance, in addition to the effect of the invention of claim 1, the congestion point on the outward route can be confirmed at a glance, and based on this information You can select an appropriate return route.

[Brief description of drawings]

FIG. 1 is a complaint correspondence diagram.

FIG. 2 is a diagram showing a configuration of an example.

FIG. 3 is a flowchart showing a display control program.

FIG. 4 is a flowchart showing a trajectory display routine.

FIG. 5 is a diagram showing a display example of a traveling locus of a vehicle.

[Explanation of symbols]

 1 Vehicle speed sensor 2 Computer 2m memory 3 GPS receiver 4 Gyroscope 5 Geomagnetic sensor 6 CD-ROM 7 Display 11 Current position mark 12-14 Track mark 15 One way mark 100 Distance detection means 101 Direction detection means 102 Map storage means 103 Route Calculation means 104 Display means 105 Speed detection means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Amaya 2499 Hironodai, Zama City, Kanagawa Pref. Within Xanavie Informatics Co., Ltd.

Claims (2)

[Claims] 1. A distance detecting means for detecting a traveling distance of a vehicle, an azimuth detecting means for detecting a traveling azimuth of the vehicle, a map storing means for storing a road map, and a traveling distance detected by the distance detecting means. And a route calculation means for calculating a travel route to the current position on the road map stored in the map storage means, based on the traveling direction detected by the direction detection means, and the road map from the map storage means. And a display unit for displaying a locus mark indicating the traveling azimuth of the vehicle for each predetermined traveling distance on the travel route calculated by the route calculation unit. Trajectory display device. 2. The vehicle running locus display device according to claim 1, further comprising a speed detecting means for detecting a running speed of the vehicle, wherein the locus mark indicates a traveling direction of the vehicle and the speed detecting means. A traveling locus display device for a vehicle, which indicates a traveling speed of the vehicle detected by means.