JP2919629B2 - Area reachable area display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[Object of the Invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a unit time reachable area display device for displaying an area reachable within a unit time by a moving body such as an automobile moving on a road.

[0003]

2. Description of the Related Art In the case of a fire truck traveling on a road, when a fire occurs, one of a plurality of patrol fire trucks that can arrive at a fire site most quickly is selected. To make an express.

In this case, when calculating the arrival distance within a unit time, a travel route is determined, the distance to the fire occurrence site is integrated, and this integrated value is divided by the average speed of the fire truck to start the fire from the current position. We calculate the time it takes to arrive at the site.

[0005]

However, in the above-mentioned conventional fire truck selection method, one of the respective fire trucks during patrol is selected, and based on the current position of the fire truck and the fire occurrence site. Calculate the arrival time of the lever fire truck,
After that, it is necessary to select each fire truck sequentially and calculate the arrival time on site for each fire truck, such as selecting the next fire truck and calculating the arrival time of this fire truck,
When a fire occurs, there is a problem that it takes too much time to find a fire engine capable of arriving at a fire occurrence site fastest among the fire engines.

In particular, when the number of branches of the road between each fire truck and the fire occurrence site is large, the number of combinations of routes increases, and it is possible to reach the fire occurrence site fastest within a realistic calculation time. You will not be able to select a fire engine that can.

For this reason, it is practically impossible to determine a plurality of routes to the fire occurrence site for each fire truck, and each fire truck concentrates on the same route and stops at a railroad crossing or the like on this route. All fire trucks were sometimes delayed from reaching the fire site.

In view of the above circumstances, the present invention calculates the reachable area per unit time of a moving body such as a fire engine at a high speed and displays the area overlaid on a map so that each moving body can reach it. It is an object of the present invention to provide a reachable area display device within a unit time, which allows a plurality of possible routes to be selected and allows the reachable time of each moving body to be grasped at a time.

[Structure of the Invention]

[0010]

In order to achieve the above-mentioned object, a reachable area display device in a unit time according to the present invention is provided.
A road information database unit that stores road information on each road, a moving object position information generating unit that generates moving object position information indicating a current position or a virtual position of each moving object, and a moving object position capturing unit. A reachable area calculation unit for determining a reachable area per predetermined time of each moving body based on the generated moving body position information of each moving body and each road information stored in the road information database unit; A display information synthesizing unit is provided which superimposes the reachable area of each mobile object obtained by the reachable area calculation unit and the auxiliary screen and displays the auxiliary screen on the display device.

[0011]

In the above configuration, the current position of each moving object generated by the reachable region calculation unit by the moving object position information generating unit or the moving object position information indicating the virtual position is stored in the road information database unit. The reachable area of each mobile unit per predetermined time is obtained from each road information, and the reachable area of each mobile unit obtained by the reachable area calculation unit by the display information synthesis unit is superimposed on the auxiliary screen. And displayed on the display device.

[0012]

FIG. 1 is a block diagram showing an embodiment of an apparatus for displaying a reachable area within a unit time according to the present invention.

[0013] The unit reachable area display device shown in FIG. 1 includes a target position input unit 1, a map database unit 2,
A map search unit 3, a speed database unit 4, a speed search unit 5, a road database unit 6, a road information search unit 7,
Reachable region calculation unit 8, display information synthesis unit 9, CRT
10. Each of these fire trucks is a unit based on the current position of each fire truck and the speed data of each road on which these fire trucks are running or on which roads are scheduled to run. Reachable area data that can be reached in time is calculated, and a composite screen is created by superimposing each of the reachable area data, road network data, and map image data, and this is displayed on the CRT 10.

A target position input unit 1 is a keyboard for inputting the current position of each fire truck and address data of a fire occurrence site or the like, or a mouse for designating the current position of each fire truck or the position of a fire occurrence site or the like. And an automatic position detecting device for automatically detecting the position of each fire truck. The position of each fire truck is always taken in, and this is used as fire truck position data. When the information indicating the occurrence of a fire or the address data thereof is input by operating the keyboard or the mouse and inputting the data to the section 5 and the road information search unit 7, the disaster location indicating the place where the fire occurred is provided. Data is generated and supplied to the map search unit 3 and the reachable area calculation unit 8. Also, when temporary direction change point data and traveling direction data for each fire truck are input by operating a keyboard or a mouse, the temporary fire truck position data (virtual fire truck) corresponding to the direction change point data and traveling direction data is obtained. The position data) is generated and supplied to the reachable area calculation unit 8, the speed search unit 5, and the road information search unit 7.

The map database unit 2 is composed of an optical disk device, a magneto-optical disk device, a large-capacity hard disk device, and the like, and stores a map of an adaptation area in which terrain, buildings, streets, and place names are entered by an image scanner or the like. When the read map image data pieces are supplied, these map image data pieces 11 are connected and stored as one map image data 12 as shown in FIG. When supplied, the image of the place designated by the read command is extracted from the map image data 12 and supplied to the map search unit 3 as map image data.

The map search unit 3 has various interfaces, calculates address data of a map indicating the disaster location based on the disaster location data output from the target location input unit 1, and generates a read command. Then, the map image data corresponding to the address data is read from the map database unit 2 and supplied to the display information synthesizing unit 9.

The speed database unit 4 is constituted by a hard disk device or the like, and is capable of moving at each of an up line and a down line of each main road, an average moving speed, an intersection, a crossing, a railroad crossing, and other obstacle locations. When road data such as waiting time is supplied, these are stored for each main road,
When a read command is supplied from the speed search unit 5, the road data of the main road specified by the read command is read and supplied to the speed search unit 5.

The speed search unit 5 has various interfaces, and each fire truck is currently running based on each fire truck position data and each virtual fire truck position data output from the target position input unit 1. Each road number data indicating a road and each road number data indicating a road when each fire truck tentatively travels are calculated, and a read command is generated to output a road corresponding to each road number data from the speed database unit 4. The data is read out and supplied to the reachable area calculation unit 8.

The road database unit 6 is composed of a large-capacity hard disk device or the like, and as shown in FIG.
Road vector that is divided for each of the up and down lines of each of the main roads 14 and that indicates the extension and position of each main road, the traffic direction, the signal, the crossing position, etc. When (X, Y coordinate data) is supplied,
These are stored as road network data, and when a read command is supplied from the road information search unit 7, the road network data of the main road specified by the read command is read and supplied to the speed search unit 5.

The road information search unit 7 has various interfaces, and based on each fire truck position data and each virtual fire truck position data output from the target position input unit 1, the current travel of each fire truck is performed. In addition to calculating the road number data indicating the road in which the vehicle is located and the road number data indicating the road when each fire truck tentatively travels, a read command is generated and the road database unit 6 generates a road corresponding to the road number data. The network data is read out and supplied to the reachable area calculator 8 and the display information synthesizer 9.

The reachable area calculation unit 8 includes various arithmetic circuits, a microprocessor, and the like. When the damaged position data is output from the target position input unit 1, the target position input unit 8 is used based on the damaged position data. From among the fire truck position data output from the unit 1, fire truck position data of a fire truck running in a predetermined area corresponding to the disaster location data is selected, and based on each of the fire truck position data. Of the road data output from the speed search unit 5 and the road network data output from the road information search unit 7, the road data and road network data of each fire truck indicated by each fire truck position data are Based on the selected road data and the road network data, a reachable area within a unit time for each fire truck is calculated and obtained by this calculation operation. Supplying the reachable area data indicating each reachable areas in the display information synthesizing unit 9.

In this case, the reachable area calculation unit 8 calculates the reachable area of each fire truck according to the following procedure.

At first, the reachable area calculation unit 8 shown in FIG.
The present position C of the fire truck is obtained based on the fire truck position data of the fire truck to be calculated as shown in FIG.

Thereafter, the road network data (road vector 1)
5) The traveling direction of the fire truck is determined based on 5), and the speed at which the vehicle can move in the same direction as the traveling direction from the road data, the average traveling speed, the waiting time at obstacles such as intersections, railroad crossings, and the like. 4 (b) is selected.
Calculating a position P ₁ after unit time with respect to the traveling direction of the said fire engine on the basis of the road data as shown in.

Next, the reachable area calculation unit 8 calculates the speed at which the vehicle can move in the direction opposite to the traveling direction, the average speed at which the vehicle can travel, the waiting time at obstacles such as intersections, level crossings, etc. from the road data. Select the data and select FIG.
The fire engine calculates the position P ₂ after unit time in when a U-turn and travels to U-turn can be located on the basis of the road data as shown in.

After that, the reachable area calculation unit 8 selects road data such as a movable speed and an average movable speed in a direction perpendicular to the traveling direction from the road data, and the road data is shown in FIG. As shown, the position P after a unit time when the fire truck turns left based on the road data
_3, calculates the position P ₄ after unit time at when the right turn.

Next, the reachable area calculation unit 8 is shown in FIG.
The fire truck by connecting the respective positions P ₁ to P ₄ as shown in (e) is seeking reachable areas S which can be reached in a unit time displaying the reachable area data indicating the reachable area S The information is supplied to the information synthesizing unit 9.

The reachable area calculation unit 8 also calculates the position Cd of the virtual fire truck position data with respect to the virtual fire truck position data for the virtual fire truck position data as shown in FIG. A reachable area S with respect to the traveling direction is obtained, and reachable area data indicating the reachable area S is supplied to the display information synthesizing unit 9.

The display information synthesizing section 9 includes various synthesizing circuits, and includes a map screen indicated by the map image data output from the map searching section 3 and a road network data output from the road information searching section 7. A composite screen is created by superimposing a road network screen indicated by the symbol “” and each reachable area screen indicated by the respective reachable area data output from the reachable area calculation unit 8. Is supplied to the CRT 10.

The CRT 10 is constituted by a display device having a display capacity necessary for displaying a map or the like. When the display information synthesizing section 9 supplies the synthetic screen data, the CRT 10 responds to the synthetic display screen data. Create a screen and display it.

Next, the calculation operation and display operation of the reachable area within a unit time of this embodiment will be sequentially described with reference to FIGS.

First, when the power of the reachable area display device within the unit time is turned on, the target position input unit 1 always takes in the positions of the fire trucks within the adaptation target range and stores each fire truck position data. Based on the generated fire truck position data, the speed search unit 5 is operated to read out road data corresponding to the respective fire truck position data stored in the speed database unit 4 and to read the road data. In addition to supplying the data to the arithmetic unit 8, the road information search unit 7 is operated based on each of the fire truck position data to read out the road network data corresponding to each of the fire truck position data from the road database unit 6 and to reach the data. It is supplied to the possible area calculation unit 8 and the display information synthesis unit 9.

In this state, if a fire occurs within the adaptation range, the target position input unit 1 generates damaged position data indicating the position where the fire occurred, and outputs the data to the reachable area calculation unit 8 and the map. This is supplied to the search unit 3.

Thus, the reachable area calculation unit 8 operates to find each fire truck traveling in a predetermined area including the damaged position data based on the damaged position data output from the target position input unit 1. At the same time, of the road data output from the speed search unit 5 and the road network data output from the road information search unit 7, each fire truck is determined based on the road data corresponding to each fire truck and the road network data. An area (reachable area S) that can be reached within a unit time of the car is obtained, and reachable area data corresponding to each of the reachable areas S is supplied to the display information synthesis unit 9.

In parallel with this operation, the map retrieval unit 3 operates to read out the map image data corresponding to the disaster location data from the map database unit 2 and supply it to the display information synthesizing unit 9. The display information synthesizing unit 9 synthesizes the map image data, the road network data, and the reachable area data to create synthesized screen data, and supplies the synthesized screen data to the CRT 10 to display a synthesized screen.

At this time, if the target position input unit 1 is operated to input direction change point data such as an intersection and traveling direction data, the target position input unit 1 converts the direction change point data and the traveling direction data to the above. The corresponding provisional fire truck position data (virtual fire truck position data) is output, and road data corresponding to the virtual fire truck position data is read from the speed database unit 4 and can be reached via the speed search unit 5. In addition to being supplied to the area calculation unit 8, road network data corresponding to the virtual fire truck position data is read from the road database unit 6 and supplied to the reachable area calculation unit 8 via the road information search unit 7. The reachable area S according to the virtual fire truck position data is calculated, and this is synthesized by the display information synthesizing unit 9 and displayed on the CRT 10.

Thus, the position of the place where the fire occurred and the position of each fire truck can be known only by looking at the composite screen, and the fire trucks arrive within a unit time from the current position of each fire truck. It is possible to know the reachable area S that can be reached and the reachable area S that can be reached within a unit time from the position when each fire truck is driven to the designated position, and You can know if you can reach the site of occurrence the fastest.

As described above, in this embodiment, a reachable area which can be reached within a unit time from the current position for each fire engine is calculated, and these are superimposed on the road network data and the map image data, and the CRT 10 is used. Because it was displayed above, multiple reachable routes of each fire truck,
In addition to being able to make a selection, the reachable time of each fire truck can be grasped at a time.

In the above-described embodiment, the reachable area S of each fire truck is calculated for the main road, but the reachable area of each fire truck is also calculated for each branch line connected to each trunk line. May be calculated and displayed together with the road information of each branch line in a color-coded manner by stage.

In the above-described embodiment, the positions P ₃ and P ₄ after a unit time with respect to the direction orthogonal to the traveling direction of each fire truck are determined based on each road network data read from the road database unit 6. Although it has to, previously set coefficient, the position P ₃ of the unit time after the relative direction perpendicular to the traveling direction of the respective fire engine by multiplying the coefficient at the position P ₂ after a unit time with respect to the running direction of the fire truck , may be obtained P _4.

[0041]

As described above, according to the present invention, the reachable area per unit time of a moving body such as a fire engine is calculated at a high speed, and this is superimposed and displayed on a map. A plurality of reachable routes of the moving body can be selected, and the reachable time of each moving body can be grasped at a time.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a device for displaying a reachable area within a unit time according to the present invention.

FIG. 2 is a schematic diagram showing an example of map image data stored in a map database unit shown in FIG.

FIG. 3 is a schematic diagram illustrating an example of road network data stored in a road database unit illustrated in FIG. 1;

FIG. 4 is a schematic diagram illustrating an operation example of a reachable area calculation unit illustrated in FIG. 1;

FIG. 5 is a schematic diagram illustrating an operation example of a reachable area calculation unit illustrated in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Moving body position information generation part (target position input part) 4 Road information database part (speed database part) 6 Road information database part (road database part) 8 Reachable area calculation part 9 Display information synthesis part 10 Display device (CRT)

Claims (1)

(57) [Claims] 1. A road information database unit that stores road information on each road, a moving object position information generating unit that generates moving object position information indicating a current position or a virtual position of each moving object, Reachable area for finding a reachable area per predetermined time of each moving body based on moving body position information of each moving body generated by the body position capturing unit and each road information stored in the road information database unit A unit comprising: a calculation unit; and a display information synthesis unit that superimposes the reachable region of each mobile object obtained by the reachable region calculation unit and the auxiliary screen and displays the auxiliary screen on a display device. In-time reachable area display device.