JP4552220B2 - Moving body position display device and moving body position display method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile object position display device and a mobile object position display method for displaying a location of a mobile object on a map screen.
[0002]
[Prior art]
Conventionally, in the field of automobiles, which are typical mobile bodies, various navigation systems have been proposed that display the detected current position of the host vehicle on a map screen and guide the route to a desired destination. Yes.
[0003]
As an example of such a navigation system, Japanese Patent Application Laid-Open No. 2000-59533 also proposes a system that displays information acquired by performing communication between a plurality of mobile objects.
[0004]
[Problems to be solved by the invention]
However, in the above conventional technique, when the current positions of a plurality of moving bodies are displayed on the same map screen, the user cannot intuitively recognize the change in the approaching state of these moving bodies.
[0005]
Therefore, the present invention provides a moving body position display device and a moving body position display method for displaying a moving state of a moving body in a display mode that can be easily recognized by a user. Legal For the purpose of provision.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a mobile object position display device according to the present invention is characterized by the following configuration.
[0007]
That is, a mobile object position display device that displays the location of a plurality of mobile objects on the same map screen, and calculates the center of gravity of the location of the mobile objects based on the position information of the plurality of mobile objects In addition, on the same map screen corresponding to the area including the location of the plurality of moving bodies, the calculated gravity center point is arranged at the approximate center of the map screen. Provided with display control means for displaying in display mode The display control means, when a common destination is set for the plurality of mobile bodies, based on the position information of the plurality of mobile bodies and the location information of the destination, And calculating a symbol representing the plurality of moving objects and a symbol representing the destination on the same map screen corresponding to an area including the locations of the plurality of moving objects and the destination. The calculated barycentric point is displayed in a display form arranged at the approximate center of the map screen. It is characterized by that.
[0009]
In addition, a mobile object position display device having another configuration that achieves the above-described object is as follows. Multiple The location of the moving body and Common to the plurality of moving objects Is a moving body position display device that displays the destination on the same map screen, plural Based on the position information of the moving body and the position information of the destination plural While calculating the center of gravity of the location of the moving object and the destination, plural On the same map screen corresponding to the area including the location of the moving object and the destination, plural Represents a moving object Individual A symbol and a symbol representing the destination The table Display control means to display, in front When the destination is located at one end point of the polygon in the maximum area polygon formed by the locations of the destination and the plurality of moving objects, the display control means displays the barycentric point as the map screen. When the destination is included in a polygon with the maximum area formed by the locations of the plurality of moving objects, a symbol representing the destination is displayed. It is characterized by being displayed in a display form arranged at the approximate center of the map screen.
[0016]
The above-mentioned object is to display the moving body position corresponding to the moving body position display device having the above-described configuration. To the law Therefore, it is realizable.
[0017]
【The invention's effect】
According to the present invention, the moving body position display device and the moving body position display method for displaying the moving state of the moving body in a display mode that can be easily recognized by the user. Legal Provision is realized.
[0018]
That is, claim 1, claim 2, claim 10 , Claims 11 According to this invention, since the calculated barycentric point is displayed at substantially the center of the map screen, the user can intuitively and easily recognize the moving state of the moving object.
[0020]
According to the invention of claim 1, the user can intuitively and easily recognize the approaching state of each moving body to a common destination. Claims 2 According to the present invention, since the symbol representing the destination is always displayed at a position that is easy to see, the convenience is improved.
[0021]
Claims 3 According to the invention, when a plurality of moving objects and symbols representing the destination are present in a wide range, some of the moving objects are not displayed on the map screen, but the user can easily recognize them. Since a map screen having a scale smaller than a predetermined scale is not displayed, the recognizability of the displayed map screen can be maintained.
[0022]
However, when performing operation management of a plurality of mobile objects or when group traveling is performed, 3 According to the invention of the present invention, it is expected that convenience will be lacking unless more than a predetermined number of symbols representing a mobile object are displayed. 4 According to the invention, in such a case, a map screen with a scale ratio smaller than a predetermined scale ratio is selected, so that all symbols to be displayed are displayed on the map screen, so that convenience is maintained. can do.
[0023]
Claims 5 According to this invention, since the mobile body can be prevented from being displayed at the end of the map image, the convenience can be improved.
[0024]
In addition, for example, when the moving body is an automobile, selecting a heading-up display mode on a mountain road or the like where a loop bridge or a curved road continues, it becomes uncomfortable for a user who turns around the displayed map screen. Is the claim 6 According to the invention, such an unpleasant state is displayed, for example, in such a manner that the barycentric point is arranged above the symbol representing the self-moving body. 7 ) Or the like.
[0026]
In addition, it is not easy for human vision to grasp at a glance the movement status of each mobile object on a map screen in which individual symbols representing a plurality of mobile objects are scattered. 8 According to the invention, since the polygonal shape formed by these symbols continuously changes on the map screen, it is possible to intuitively and easily recognize the movement status of these moving objects.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a mobile body position display device according to the present invention will be described in detail with reference to the drawings as an embodiment in which the mobile body position display device is applied to a navigation device for a vehicle (automobile) that is a representative mobile body.
[0028]
[First Embodiment]
FIG. 1 is a block diagram illustrating an internal configuration of an in-vehicle navigation device with a communication function according to the first embodiment.
[0029]
In the figure, 22 is a display such as a liquid crystal display, and 23 is an input device comprising a key switch and various pointing devices. A ROM 24 stores a boot program and the like. Reference numeral 25 denotes a RAM that temporarily stores various processing results. Reference numeral 26 denotes a storage device such as a hard disk drive (HDD) that stores map information and programs for navigation. Reference numeral 27 denotes a communication interface (wireless transmitter / receiver) that communicates with a vehicle-mounted navigation device with a communication function having a similar device configuration via a communication line 30 such as the Internet. Reference numeral 28 denotes a GPS unit that detects the current position based on a GPS (Global Positioning System) signal received from the outside. Each of these components is connected via an internal bus 29, and a CPU (Central Processing Unit) 21 executes display control processing to be described later in accordance with a control program stored in the storage device 26.
[0030]
Such a control program can be read from a portable storage medium such as a DVD-ROM or acquired from the outside via the communication line 30 even if it is executed after the CPU 21 reads out the one burned in the ROM 24 in advance. May be stored in the storage device 26 as appropriate, and read out before execution.
[0031]
The navigation apparatus having the device configuration shown in FIG. 1 employs position information (consisting of data items such as latitude, longitude, altitude, etc.) common to other vehicles equipped with the navigation device having the same device configuration in this embodiment. In addition, the current position (location position) information of the vehicle is acquired, and the current position of the host vehicle is detected by a general method using the GPS unit 28 and a gyro (not shown). And the symbol which shows the present position of the own vehicle and another vehicle can be displayed on the same map screen displayed on the display 22, and it has the characteristic in the display mode.
[0032]
FIG. 7 is a diagram illustrating a map screen displayed on the display 22 in the first embodiment.
[0033]
The navigation device according to the present embodiment calculates the center of gravity of the location of the vehicle based on the current position information of the host vehicle and the other vehicle, and, as shown in FIG. The center of gravity point is displayed on the same map screen corresponding to the area including the location of the plurality of vehicles, and a symbol representing the plurality of vehicles (marked with ● in the figure). It is displayed in a display form arranged at substantially the center of the map screen to be displayed (note that the symbol representing the center of gravity does not have to be displayed on the map screen).
[0034]
Note that the calculation method for calculating the centroid points of the positions based on the position information of a plurality of locations may adopt a general calculation procedure, and thus detailed description in this embodiment is omitted.
[0035]
According to such a navigation device, the user can intuitively and easily recognize the movement status of the host vehicle and other vehicles.
[0036]
Further, when displaying such a map screen, between the symbols representing each vehicle, each side of the polygon (the triangle in FIG. 7) of the maximum area formed by the symbols is displayed in a display color such as red for easy identification by the user. (However, if the displayed map screen has sufficient visibility with only the symbols of the vehicles, the sides connecting the symbols may not be displayed). In general, for human vision, on a map screen in which individual symbols representing a plurality of vehicles are scattered, the movement status of each vehicle (that is, which vehicle is moving in which direction and at what speed). Although it is not easy to grasp at a glance, in this embodiment, since the polygonal shape formed by these symbols continuously changes on the map screen, the user is more intuitive about the movement status of these vehicles. Can be easily and easily recognized.
[0037]
Here, the procedure of the display control process performed by the navigation device to display the map screen illustrated in FIG. 7 will be described.
[0038]
FIG. 2 is a flowchart showing a display control process performed by the navigation device in the first embodiment, and shows an operation procedure performed by a software program executed by the CPU 21.
[0039]
In the figure, Step S1, Step S2: When a mode (group running mode) in which the current positions of a plurality of predetermined vehicles are displayed on the same map screen by the operation of the input device 23 is selected by the user (Step S1). The current position information of other vehicles forming the group is acquired from the outside while referring to the identification information of the predetermined plurality of vehicles forming the group registered in advance in the storage device 26 and the like, and The current position is detected (step S2). In addition, since the general method can be employ | adopted for the detection method of the present position of the own vehicle, and the method of acquiring the present position of another vehicle via a communication line, detailed description in this embodiment is abbreviate | omitted.
[0040]
Step S3: A pattern shape (triangle in FIG. 7) having the largest area is selected from polygons formed by connecting a plurality of vehicles (moving bodies) forming a group with straight lines (see FIG. 8).
[0041]
Steps S4 to S6: The center of gravity (middle point) of the polygon selected in Step S3 is calculated based on a general geometrical calculation formula (Step S4) and includes the locations of the plurality of vehicles. The same map screen corresponding to the area to be displayed is displayed on the display 22 together with the symbol of the current position of each vehicle so that the calculated center of gravity is arranged at the approximate center of the screen (step S5, step S6). At this time, the scale ratio of the map screen to be displayed is changed to a scale ratio at which each individual symbol can be displayed on the same map screen.
[0042]
<Modification of First Embodiment>
In the first embodiment described above, a plurality of vehicles (the host vehicle and other vehicles) are displayed on the same screen. For this reason, since the map screen of a smaller scale ratio is displayed so that the symbols of all the vehicles are displayed on the same map screen so that these vehicles are scattered in a wide range, it is difficult for the user to see There is also.
[0043]
Therefore, in this modification, even when all of these symbols cannot be displayed on the same map screen, display at a scale smaller than the predetermined scale is prohibited, thereby recognizing the map screen for the user. To maintain.
[0044]
However, even if it is not possible to display all the individual symbols on the same map screen on a map screen with a scale ratio larger than the predetermined scale ratio, for example, when traveling in a group, etc. If the symbol is not displayed, it is not convenient.
[0045]
Therefore, when there are a plurality of symbols that cannot be displayed on a map screen having a scale ratio larger than the predetermined scale ratio, the predetermined scale is used as the scale ratio adopted in the map screen to be displayed so that the number of symbols not displayed is less than the predetermined number. Choose a scale factor smaller than the rate. As a result, although the map screen has a scale ratio smaller than the predetermined scale ratio, the number of symbols that are not displayed on the screen can be made smaller than a predetermined number, so that the overall movement status of the host vehicle and other vehicles cannot be recognized. That can be prevented.
[0046]
The items described in this modification apply to the third, fifth, and sixth embodiments described below, that is, when a plurality of symbols indicating a plurality of vehicles and a common destination are displayed. be able to.
[0047]
[Second Embodiment]
Next, a second embodiment based on the hardware configuration of the navigation device according to the first embodiment described above will be described. In the following description, the description similar to that of the first embodiment will be omitted, and the description will focus on the characteristic part of the present embodiment.
[0048]
In this embodiment, the navigation device can display the location of the host vehicle and the set route guidance destination on the same map screen, and has a feature in its display mode. For this reason, in this embodiment, it is not necessary to acquire position information from other vehicles via a communication line.
[0049]
FIG. 9 is a diagram illustrating a map screen displayed on the display 22 in the second embodiment.
[0050]
As shown in FIG. 9, the navigation apparatus according to the present embodiment displays a symbol representing the current position of the host vehicle (marked with ● in the figure) and a symbol representing the destination (marked with ■ in the figure). On the same map screen corresponding to the area including the location and the destination, a symbol representing the destination is displayed in a display form arranged at the approximate center of the map screen to be displayed. In the present embodiment, since the symbol representing the destination is displayed at the approximate center of the map screen, the user can intuitively and easily recognize the approach situation of the host vehicle to the destination.
[0051]
In the present embodiment, when the map screen is displayed, the symbols representing the host vehicle and the destination may be displayed in a display color such as red for easy identification by the user.
[0052]
Here, the procedure of the display control process performed by the navigation device to display the map screen illustrated in FIG. 9 will be described.
[0053]
FIG. 3 is a flowchart showing a display control process performed by the navigation device in the second embodiment, and shows an operation procedure performed by a software program executed by the CPU 21.
[0054]
3A, step S11 to step S13: when the user selects a mode in which the destination is displayed at the approximate center of the map screen by operating the input device 23 (step S11), the destination Is set so as to be arranged at substantially the center of the display screen (step S12), and the current position of the vehicle is detected (step S13).
[0055]
Step S14: A map screen of a range including the current position of the host vehicle is displayed on the display 22 together with the destination and the symbol of the host vehicle with the destination approximately at the center. At this time, if the display position of the symbol indicating the host vehicle is located at the end on the map screen, it cannot be said that it is easy for the user to see. Therefore, in such a case, the map screen displayed by automatically scrolling the map screen to be displayed so that the display position of the symbol of the host vehicle is shifted by a predetermined amount toward the center of the map screen. It is good to ensure the visibility of
[0056]
Further, contrary to the display mode of FIG. 9, the symbol representing the current position may be displayed in a display mode (not shown) arranged at the approximate center of the map screen to be displayed, and the area around the host vehicle is wide. Since it is displayed, it is suitable when visiting a sightseeing spot in the vicinity in the process of moving to the destination.
[0057]
In this case, as shown in FIG. 3B, when the display mode is selected by the user (step S15), the symbol of the current position of the host vehicle detected in step S16 is set to the approximate center of the display screen. (Step S17), and a map screen in a range including the destination centered on the current position may be displayed on the display 22 (step S18).
[0058]
[Third Embodiment]
Next, a third embodiment based on the hardware configuration of the navigation device according to the first and second embodiments described above will be described. In the following description, the description similar to that of the first and second embodiments will be omitted, and the description will focus on the characteristic parts of the present embodiment.
[0059]
In the present embodiment, the navigation device displays the destination and the current position of each vehicle on the same map screen, for example, when a plurality of vehicles are moving toward a common destination in group traveling or the like. It has a feature in its display mode. For this reason, in this embodiment, it is necessary to acquire the current position information of other vehicles via a communication line.
[0060]
FIG. 10 is a diagram illustrating a map screen displayed on the display 22 in the third embodiment.
[0061]
As shown in FIG. 10, the navigation device according to the present embodiment shows a symbol (● mark in the figure) indicating the current positions of the host vehicle and other vehicles, and a symbol (■ mark in the figure) indicating a common destination. In addition, on the same map screen corresponding to the area including the location of the host vehicle and other vehicles and the destination, a display mode in which a symbol representing the destination is arranged at the approximate center of the map screen to be displayed Is displayed. In this embodiment, since the symbol representing the destination is displayed at the approximate center of the map screen, the user of each vehicle can intuitively and easily recognize the approaching situation of the host vehicle and other vehicles with respect to the common destination. Can do.
[0062]
In the present embodiment, when the map screen is displayed, the symbols representing the host vehicle and other vehicles and the destination may be displayed in a display color such as red for easy identification by the user.
[0063]
Here, a procedure of display control processing performed by the navigation device to display the map screen illustrated in FIG. 10 described above will be described.
[0064]
FIG. 4 is a flowchart showing display control processing performed by the navigation device in the third embodiment, and shows an operation procedure performed by a software program executed by the CPU 21.
[0065]
In the figure, step S21 to step S23: When the user selects a mode in which the common destination of a plurality of predetermined vehicles is displayed at the approximate center of the map screen by operating the input device 23 (step S21). Then, the position information of the common destination of the group registered in advance in the storage device 26 or the like is read (step S22), and the symbol of the destination is set to be arranged at the approximate center of the display screen (step S23). ).
[0066]
Steps S24 and S25: While referring to the identification information of the predetermined plurality of vehicles forming the group, the current position information of the other vehicles forming the group is acquired from the outside and the current position of the host vehicle is detected (step S24). S24) A map screen of a range including the current positions of the host vehicle and other vehicles is displayed on the display 22 with the destination and the symbols of the plurality of vehicles centered on the destination (step S25).
At this time, the scale ratio of the map screen to be displayed is changed to a scale ratio at which each individual symbol can be displayed on the same map screen.
[0067]
[Fourth Embodiment]
Next, a fourth embodiment based on the hardware configuration of the navigation device according to the first embodiment described above will be described. In the following description, the description similar to that of the first embodiment will be omitted, and the description will focus on the characteristic part of the present embodiment.
[0068]
FIG. 11 is a diagram illustrating a map screen displayed on the display 22 in the fourth embodiment.
[0069]
In this embodiment, the navigation device displays the location of the host vehicle and the set route guidance destination on the same map screen, and also shows a symbol (● mark in the figure) indicating the host vehicle and the destination. Are displayed on the same map screen in such a manner that the symbol at the middle point of these two points (× mark in the figure) is displayed in the display screen with the approximate center of the map screen. For this reason, in this embodiment, it is not necessary to acquire position information from other vehicles via a communication line. According to this display mode, it is possible to display the location of the host vehicle and the destination with a good balance with the calculated midpoint as the center.
[0070]
Further, when the map screen is displayed, the symbols representing the host vehicle and the destination are displayed in a display color such as red for easy identification by the user.
[0071]
Here, a procedure of display control processing performed by the navigation device to display the map screen illustrated in FIG. 11 described above will be described.
[0072]
FIG. 5 is a flowchart showing a display control process performed by the navigation device in the fourth embodiment, and shows an operation procedure performed by a software program executed by the CPU 21.
[0073]
In the figure, Steps S31 to S33: A mode in which the midpoint between the current position of the host vehicle and the destination is displayed at the approximate center of the map screen by the operation of the input device 23 is selected by the user (Step S31). In this case, the current position of the host vehicle is detected (step S32), and the position information of the destination registered in advance in the storage device 26 is read (step S33).
[0074]
Steps S34 and S35: The host vehicle and the destination are connected by a straight line (step S34), and the midpoint of the straight line is calculated by a general method (step S35).
[0075]
Step S36, Step S37: The midpoint symbol calculated in Step S35 is set so as to be arranged at substantially the center of the display screen (Step S36), and the map screen in the range including the destination and the current position of the host vehicle is displayed. The information is displayed on the display 22 together with the symbols of the destination, the host vehicle, and the midpoint (step S37). At this time, the scale ratio of the map screen to be displayed is changed to a scale ratio at which each individual symbol can be displayed on the same map screen.
[0076]
[Fifth Embodiment]
Next, a fourth embodiment based on the hardware configuration of the navigation device according to the first embodiment described above will be described. In the following description, the description similar to that of the first embodiment will be omitted, and the description will focus on the characteristic part of the present embodiment.
[0077]
In the present embodiment, the navigation device displays the destination and the current position of each vehicle on the same map screen, for example, when a plurality of vehicles are moving toward a common destination in group traveling or the like. It has a feature in its display mode. For this reason, in this embodiment, it is necessary to acquire the current position information of other vehicles via a communication line.
[0078]
FIG. 12 is a diagram illustrating a map screen displayed on the display 22 in the fifth embodiment.
[0079]
In the present embodiment, the navigation device calculates the center of gravity of each position based on the position information of the own vehicle and other vehicles and the position information of the common destination, and as illustrated in FIG. The calculated symbol of the center of gravity (X in the figure), the symbol indicating the multiple vehicles (marked with ● in the figure), and the symbol indicating the destination (marked with ■ in the figure) are displayed at the current position of the multiple vehicles. On the same map screen corresponding to the area that includes the destination and the destination, and the center of gravity is displayed in a display form with the approximate center of the map screen (note that the symbol representing the center of gravity is displayed on the map screen) You do n’t have to).
[0080]
According to this display mode, the calculated barycentric point is displayed at the approximate center of the map screen, so that the user can intuitively and easily recognize the movement status of each vehicle and the positional relationship between the destinations. .
[0081]
Here, the procedure of the display control process performed by the navigation device to display the map screen illustrated in FIG. 12 described above will be described.
[0082]
FIG. 6 is a flowchart showing a display control process performed by the navigation device in the fifth embodiment, and shows an operation procedure performed by a software program executed by the CPU 21.
[0083]
In the figure, steps S41 to S43: the mode in which the center of gravity of the current position of the host vehicle and other vehicles and the common destination of those vehicles is displayed at the approximate center of the map screen by the operation of the input device 23 (Step S41), the current position information of the other vehicles forming the group while referring to the identification information of the predetermined plurality of vehicles forming the group previously registered in the storage device 26 or the like. Is acquired from the outside, the current position of the host vehicle is detected (step S42), and the common destination position information registered in advance in the storage device 26 and the like is read (step S43).
[0084]
Step S44: A pattern shape (rectangle in FIG. 12) having the largest area is selected from polygons formed by connecting a plurality of vehicles (moving bodies) forming a group with straight lines (see FIG. 8).
[0085]
Steps S45 to S47: The center-of-gravity point (midpoint) of the polygon selected in Step S44 is calculated based on a general geometrical calculation formula (Step S45), and the locations of the plurality of vehicles are included. The same map screen corresponding to the area to be displayed is displayed on the display 22 together with the symbol of the current position of each vehicle and the symbol of the destination so that the calculated center of gravity is arranged at the approximate center of the screen (step S46). , Step S47). At this time, the scale ratio of the map screen to be displayed is changed to a scale ratio at which each individual symbol can be displayed on the same map screen.
[0086]
<Modification of Fifth Embodiment>
In the fifth embodiment described above, the center of gravity is displayed so as to be arranged at the approximate center of the screen regardless of the display position of the destination symbol on the displayed map screen.
In such a display mode, the destination symbol is located at one end point of the polygon in the polygon of the maximum area formed by the current position of the destination, the host vehicle, and the other vehicle as in the map screen illustrated in FIG. However, if it is contained inside the displayed polygon, the destination symbol is difficult for the user to see.
[0087]
Therefore, in this modification, in the polygon of the maximum area formed by the current position of the destination, the host vehicle, and the other vehicle, if the destination is located at one end point of the polygon, a symbol representing the center of gravity is displayed. They are displayed in a display form arranged at substantially the center of the map screen to be displayed (note that the symbol representing the center of gravity does not have to be displayed on the map screen).
[0088]
When the destination is included in the polygon of the maximum area formed by the current position of the host vehicle and the other vehicle, as described in the third embodiment, a symbol representing the destination is displayed. The display mode is arranged in the approximate center of the map screen to be displayed.
[0089]
According to this modified example, when a plurality of vehicles are moving toward a common destination in group traveling or the like, a symbol indicating the destination is easily recognized by the user (that is, calculated). Therefore, the user can easily recognize the proximity state of each vehicle to the destination.
[0090]
[Sixth Embodiment]
Next, a sixth embodiment based on the hardware configuration of the navigation device according to the fifth embodiment described above will be described. In the following description, the description similar to that of the first embodiment will be omitted, and the description will focus on the characteristic part of the present embodiment.
[0091]
In the conventional navigation device, the display mode of the map screen displayed on the display of the host vehicle includes a north-up display mode in which north is always directed upward regardless of the traveling direction of the host vehicle, and the host vehicle. The heading-up display mode in which the traveling direction is directed to the upper side of the display screen is employed. For example, when the navigation device is activated, it is general that the user can select any display mode.
[0092]
Among these two types of display modes, the heading up is a display mode that matches the sense of the user (driver), but in this case, when the vehicle travels on a continuous mountain road that turns with a loop bridge and a winding, Since the map screen also rotates as the traveling direction of the host vehicle changes, the user feels uncomfortable.
[0093]
Therefore, in the present embodiment, in addition to the display control process described with reference to FIG. 6, the switching process shown in FIG. 13 is also performed to prevent such discomfort from being given to the user.
[0094]
FIG. 13 is a flowchart showing a display mode switching process in the sixth embodiment, and shows an operation procedure performed by a software program executed by the CPU 21.
[0095]
When the map screen is displayed heading up as in the fifth embodiment (FIG. 12) described above, the fact that the vehicle has entered the loop bridge or the like is stored in the GPS unit 28 and the storage device 26. If detected using map information (step S51), it is determined whether the acceleration (lateral acceleration) detected by a gyro (not shown) or the like is greater than a predetermined reference value (step S52), and the detected acceleration is detected. When is smaller than the predetermined reference value, the heading-up display mode is continued (step S53).
[0096]
On the other hand, when the acceleration detected in step S52 is larger than the predetermined reference value, the heading-up display mode is prohibited until the detected acceleration becomes smaller than the predetermined reference value again (steps S54 and S55). When it is confirmed in step S55 that the acceleration is smaller than the reference value, the latest current position and traveling direction are calculated, and the heading-up display mode is resumed based on the calculated values (step S55). S57).
[0097]
Here, as a display mode of the map screen when the heading-up display mode is prohibited, for example, a method of continuing to display the map screen at the timing when the heading-up display mode is prohibited in step S54, or The center of gravity calculated in step S45 in FIG. 6 may be displayed in a display form in which the center of gravity is arranged above the symbol representing the host vehicle.
[0098]
Note that the display mode switching process in the sixth embodiment may be adopted in each of the first to fourth embodiments described above, and in that case, the displayed map screen is short as in this embodiment. User discomfort due to rotation in time can be prevented.
[0099]
In each of the above-described embodiments, the mobile body position display device according to the present invention is applied to a navigation device for a vehicle (automobile), and communication of position information and the like is performed between a plurality of vehicles on which the navigation device is mounted. However, the present invention is not limited to this system configuration, and the mobile body position display device is employed in an information processing device such as a personal digital assistant (PDA) or a mobile phone having a positioning function. You may utilize for the position display of the several mobile body (including a person) carried.
[0100]
Further, in each of the above-described embodiments, the case where each vehicle is mounted with the mobile body position display device according to the present invention and travels in a group has been described as an example. However, for example, a vehicle (mobile body) operation management system in the transportation industry When applied to, the operation manager uses the map screen of each display mode described above on the desk, so that the situation of the vehicle to be managed can be easily grasped, and the efficiency of work can be improved. it can.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating an internal configuration of an in-vehicle navigation device with a communication function according to a first embodiment.
FIG. 2 is a flowchart showing a display control process performed by the navigation device in the first embodiment.
FIG. 3 is a flowchart showing display control processing performed by a navigation device in a second embodiment.
FIG. 4 is a flowchart showing display control processing performed by a navigation device in a third embodiment.
FIG. 5 is a flowchart showing display control processing performed by a navigation device in a fourth embodiment.
FIG. 6 is a flowchart showing a display control process performed by a navigation device in a fifth embodiment.
FIG. 7 is a diagram illustrating a map screen displayed on the display 22 in the first embodiment.
FIG. 8 is a diagram illustrating a process of selecting a polygonal pattern shape to be displayed on a map screen in the first embodiment.
FIG. 9 is a diagram illustrating a map screen displayed on the display 22 in the second embodiment.
FIG. 10 is a diagram illustrating a map screen displayed on the display 22 in the third embodiment.
FIG. 11 is a diagram illustrating a map screen displayed on the display 22 in the fourth embodiment.
FIG. 12 is a diagram illustrating a map screen displayed on the display 22 in the fifth embodiment.
FIG. 13 is a flowchart showing a display mode switching process in the sixth embodiment.
[Explanation of symbols]
21: CPU,
22: Display
23: input device,
24: ROM,
25: RAM,
26: storage device,
27: Communication interface,
28: GPS unit,
29: Internal bus,
30: communication line,

Claims (11)

A mobile body position display device that displays the location of a plurality of mobile bodies on the same map screen,
Based on the position information of the plurality of moving objects, the center of gravity of the position of the moving objects is calculated, and on the same map screen corresponding to the area including the positions of the plurality of moving objects, Display control means for displaying a symbol representing a moving body in a display mode in which the calculated barycentric point is arranged substantially at the center of the map screen;
In the case where a common destination is set for the plurality of moving bodies, the display control means calculates the center of gravity of each position based on the position information of the plurality of moving bodies and the position information of the destination. And calculating, on the same map screen corresponding to the area including the location of the plurality of moving bodies and the destination, a symbol representing the plurality of moving bodies and a symbol representing the destination, A moving body position display device characterized in that the calculated barycentric point is displayed in a display form arranged at substantially the center of the map screen. A common destination location and the plurality of moving of a plurality of mobile, a mobile location display apparatus for displaying on the same map screen,
Based on the position information of the plurality of moving bodies and the position information of the destination, the center of gravity of the positions of the plurality of moving bodies and the destination is calculated, and the positions of the plurality of moving bodies and the in the same map screen on the corresponding the destination including area, the individual symbols representing a plurality of mobile, provided with a table Shimesuru display control unit and a symbol representing the destination,
Before Symbol display control means,
When the destination is located at one end point of the polygon of the maximum area formed by the location of the destination and the plurality of moving objects, the barycentric point is arranged at the approximate center of the map screen. Display in display mode,
When the destination is included in the polygon of the maximum area formed by the locations of the plurality of moving objects, a symbol representing the destination is displayed in a display form arranged at the approximate center of the map screen. A moving body position display device. The display control means changes the scale ratio of the map screen to be displayed and displays all the symbols on the same map screen in order to display all the individual symbols on the same map screen. even, the display of a small scaling factor than the predetermined reduction ratio claim 1 or claim 2 Symbol placement vehicle location display of and inhibits. The display control means reduces the number of symbols that are not displayed among the individual symbols to be less than a predetermined number when all the individual symbols cannot be displayed on the same map screen on a map screen having a scale larger than the predetermined scale. Therefore, the mobile body position display apparatus according to claim 3 , wherein a scale ratio smaller than the predetermined scale ratio is selected as the scale ratio of the map screen to be displayed. The mobile body position display device is a display device mounted or carried on the mobile body,
The display control means, when displaying a symbol indicating the location of the mobile object, if the display position of the symbol is located at an end on the map screen, the display position of the symbol is displayed on the map screen. to shift by a predetermined amount in a center direction, characterized by scrolling the map screen to be displayed according to claim 1 or claim 2 Symbol placement vehicle location display. When the mobile body position display device is a display device mounted on or carried by the mobile body, the display control means displays the map screen so that the movement direction of the mobile body is above the map screen. claim 1 or claim 2 Symbol placement vehicle location display of and inhibits the display mode of the heading-up facing the. The display control means prohibits the heading-up display mode when displaying the map screen, and displays the display in a display mode in which the barycentric point is arranged above the symbol representing the self-moving body. The moving body position display device according to claim 6 . Wherein the display control unit, wherein when displaying the individual symbols, claim 1 or claim 2 Symbol mounting a movable body, characterized in that identifiably displayed each side of the polygon largest area they symbols eggplant Position display device.   3. The moving body position display according to claim 1, wherein the display control means displays a symbol representing the barycentric point at a position corresponding to the barycentric point when displaying the map screen. apparatus. A mobile body position display method for displaying the location of a plurality of mobile bodies on the same map screen,
Based on the position information of the plurality of moving objects, the center of gravity of the position of the moving objects is calculated, and on the same map screen corresponding to the area including the positions of the plurality of moving objects, A display control step of displaying a symbol representing a moving body in a display mode in which the calculated barycentric point is arranged substantially at the center of the map screen;
In the display control step, when a common destination is set for the plurality of moving bodies, the center of gravity of each position is determined based on the position information of the plurality of moving bodies and the position information of the destination. And calculating, on the same map screen corresponding to the area including the location of the plurality of moving bodies and the destination, a symbol representing the plurality of moving bodies and a symbol representing the destination, A moving body position display method, characterized in that the calculated barycentric point is displayed in a display form arranged at substantially the center of the map screen. A common destination location and the plurality of moving of a plurality of mobile, a mobile location display method for displaying on the same map screen,
Based on the position information of the plurality of moving bodies and the position information of the destination, the center of gravity of the positions of the plurality of moving bodies and the destination is calculated, and the positions of the plurality of moving bodies and the in the same map screen on the corresponding the destination including area, the individual symbols representing a plurality of moving body and a symbol representing the destination has a table Shimesuru display control step,
In the previous Symbol display control process,
When the destination is located at one end point of the polygon of the maximum area formed by the location of the destination and the plurality of moving objects, the barycentric point is arranged at the approximate center of the map screen. Display in display mode,
When the destination is included in the polygon of the maximum area formed by the locations of the plurality of moving objects, a symbol representing the destination is displayed in a display form arranged at the approximate center of the map screen. A moving body position display method characterized by:

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