JP2008293334A - Traffic jam information display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To give useful traffic jam information to a driver by displaying traffic jam information received from a center device in an appropriate display mode. <P>SOLUTION: The onboard navigation device 1 sets traffic jam information received from the center device 2 to a non-display state or displays it while changing a display mode for showing the degree of traffic jam when a relation between the traffic jam information and a road link to be superimposed with the traffic jam satisfies a predetermined condition (for example, the road type of the road link is a specific road such as a narrow street). Since a large amount of traffic jam information received from the center device 2 is not entirely displayed as it is, but displayed while setting part of the traffic jam information received from the center device 2 to non-display or changing the display mode, the traffic jam information received from the center device 2 can be displayed in an appropriate display mode. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a traffic jam information display device configured to be able to display a traffic jam information (traffic jam line) having a predetermined length representing the degree of traffic jam received from a center device, superimposed on a road link of road map data.

Conventionally, an on-vehicle device configured to receive traffic information (congestion line) of a predetermined length representing the degree of traffic jam from the center device and to display the received traffic jam information superimposed on the road link of the road map data. A navigation device is provided (see, for example, Patent Documents 1 and 2).
JP-A-7-239997 JP 2001-194170 A

  By the way, in this type of in-vehicle navigation device, the driver displays traffic information by setting “display” and “non-display” individually for several selection items (for example, for each traffic information and each road type). It was configured to switch whether or not. However, in such a configuration, when the driver sets “display” for all selection items, a large amount of traffic jam information received from the center device is displayed as it is, and the driver is confused. is there.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to display the traffic information received from the center device in an appropriate display mode, and to provide meaningful traffic information to the driver. The object is to provide a traffic information display device capable of

  According to the first aspect of the present invention, when the traffic jam information receiving unit receives the traffic jam information having a predetermined length indicating the level of the traffic jam from the center device, the control unit displays the traffic jam information received by the traffic jam information receiving unit as the road map. The data reading means superimposes it on the road link of the road map data read from the road map data storage means and displays it on the display means. Here, when the relationship between the traffic jam information received by the traffic jam information receiving unit and the road link on which the traffic jam information is superimposed satisfies a predetermined condition, the control unit hides the traffic jam information.

  As a result, the traffic jam information received from the center device is displayed for traffic jam information whose relationship with the superimposed road link does not satisfy the predetermined condition, but the traffic jam information for which the relationship with the superimposed road link satisfies the predetermined condition is not displayed. Because it is displayed, instead of displaying all of the large amount of traffic information received from the center device as it is, the traffic information received from the center device is displayed by hiding a part of the traffic information received from the center device. The information can be displayed in an appropriate display mode, and meaningful traffic jam information can be provided to the driver.

  According to the second aspect of the present invention, the control means determines the road type of the road link on which the congestion information received by the congestion information receiving means is superimposed, and if the road type of the road link is a specific road, the traffic congestion Hide information. As a result, roads other than arterial roads (for example, highways and general roads) (for example, attachment roads, narrow streets, and roundabouts) are set in advance as specific roads, so Congestion information can be hidden, while traffic information for highways and general roads can be displayed normally (as usual).

  According to the invention described in claim 3, the control means also determines the length of the traffic jam information received by the traffic jam information receiving means, the road type of the road link is a specific road, and the length of the traffic jam information. If is within a predetermined distance, the traffic information is not displayed. As a result, it is possible to hide the congestion information within a predetermined distance to the attached road, narrow street, and roundabout, etc., and to hide the congestion information is within the range where it is advantageous for the driver. Information can be hidden.

  According to the fourth aspect of the present invention, when the traffic jam information receiving unit receives the traffic jam information having a predetermined length indicating the level of the traffic jam from the center device, the control unit displays the traffic jam information received by the traffic jam information receiving unit as the road map. The data reading means superimposes it on the road link of the road map data read from the road map data storage means and displays it on the display means. Here, when the relationship between the traffic jam information received by the traffic jam information receiving unit and the road link on which the traffic jam information is superimposed satisfies a predetermined condition, the control unit displays the traffic jam information by changing the display mode indicating the level of the traffic jam. Display on the means.

  As a result, the traffic jam information received from the center device is displayed for traffic jam information whose relationship with the superimposed road link does not satisfy the predetermined condition, but for traffic jam information whose relationship with the superimposed road link satisfies the predetermined condition Since the display mode representing the degree of traffic is changed and displayed, not all of the large amount of traffic jam information received from the center device is displayed as it is, but a part of the traffic jam information received from the center device is displayed representing the level of traffic jam By changing and displaying the mode, the traffic information received from the center device can be displayed in an appropriate display mode, and meaningful traffic information can be provided to the driver.

  According to the invention described in claim 5, the control means determines the road type of the road link on which the congestion information received by the congestion information receiving means is superimposed, and if the road type of the road link is a specific road, the traffic congestion Information is displayed on the display means by changing the display mode representing the degree of traffic jam. As a result, for example, roads other than arterial roads (for example, highways and general roads) (for example, attached roads, narrow streets, and roundabouts) other than the main roads are set in advance. Information can be displayed by changing the display mode indicating the degree of traffic jams, while traffic information for expressways and general roads can be displayed normally (as usual).

  According to the invention described in claim 6, the control means also determines the length of the traffic jam information received by the traffic jam information receiving means, the road type of the road link is a specific road, and the length of the traffic jam information. Is within a predetermined distance, the traffic information is displayed on the display means by changing the display mode indicating the degree of traffic jam. As a result, it is possible to change and display the display mode indicating the degree of the traffic jam for the traffic jam information whose length with respect to the attached road, narrow street or roundabout is within a predetermined distance, and change the display mode of the traffic jam information. It is possible to display the traffic information by changing the display mode within a range where it is advantageous for the driver to display.

  According to the invention described in claim 7, even if the road type of the road link is a specific road, the control means keeps the traffic information in an initial state unless the length of the traffic information is within a predetermined distance. Display on the display means. As a result, it is possible to normally display (conventionally) traffic jam information in which the length with respect to an attachment road, a narrow street, or a roundabout exceeds a predetermined distance.

  Hereinafter, an embodiment in which the present invention is applied to an in-vehicle navigation device will be described with reference to the drawings. FIG. 1 shows the configuration of the in-vehicle navigation device by a combination of functional blocks, and FIG. 2 shows the configuration of the center device by a combination of functional blocks.

  The in-vehicle navigation device 1 (congestion information display device in the present invention) mounted on the vehicle and the center device 2 installed in the traffic information center are configured to be communicable via a mobile communication network. The in-vehicle navigation device 1 and the center device 2 have an N (unspecified number) one-to-one relationship, and the center device 2 is configured to be able to communicate with an unspecified number of in-vehicle navigation devices 1 via a mobile communication network. .

  The in-vehicle navigation device 1 includes a control unit 3 (control means in the present invention), a position detector 4, a road map data input device 5 (road map data reading means in the present invention), an operation switch group 6, a communication device 7 ( Congestion information receiving means in the present invention, an external memory 8, a display device 9 (display means in the present invention), a voice controller 10, a voice recognition device 11, and a remote control sensor 12.

  The control unit 3 includes a CPU, a RAM, a ROM, and an I / O bus. The control unit 3 includes a known microcomputer, and controls the operation of the entire apparatus by executing a control program. The position detector 4 includes a G sensor 4a, a gyroscope 4b, a distance sensor 4c, and a GPS receiver 4d, and these components have detection errors having different properties. The control unit 3 detects (identifies) the current position by complementing the detection signals input from these components. In this case, the position detector 4 does not have to include all these components as long as the current position can be detected with the required detection accuracy, and the steering sensor for detecting the steering angle of each steering wheel and each wheel. A wheel sensor for detecting rotation may be combined.

  The road map data input device 5 is mounted with a recording medium 13 (road map data storage means in the present invention) made of, for example, a DVD-ROM, and road map data (node information and road type) recorded on the recording medium 13 is loaded. ), Landmark data, map matching data, and the like. Note that the recording medium 13 may be a CD-ROM, a memory card, an HDD, or the like. The operation switch group 6 includes mechanical switches arranged around the display device 9 and touch switches formed on the display device 9, and details of operations performed by crew members including the driver (for example, menu display selection, destination setting). , Route search, route guidance start, display screen change, volume adjustment, etc.) are detected and output to the control unit 3.

  The communication device 7 communicates with the center device 2 via a mobile communication network. The external memory 8 is composed of a large-capacity storage device such as an HDD, and stores large-capacity data and data that should be retained even when the power is turned off. The display device 9 is composed of, for example, a color liquid crystal display, displays various display screens such as a menu display selection screen, and superimposes a current position figure representing a current position, a travel locus, and the like on a road link of road map data. To display. The display device 9 may be composed of an organic EL, a plasma display, or the like.

  The voice controller 10 controls the operation of the voice recognition device 11 and outputs, for example, voice guidance for route guidance from the speaker 14. The voice recognition device 11 recognizes the voice input by the microphone 15 according to a voice recognition algorithm. The remote control sensor 12 outputs an operation signal received from the operation remote controller 16 to the control unit 3.

  For each function, the control unit 3 compares the road map data acquisition unit for acquiring road map data, the current position with the road map data acquired by the road map data acquisition unit, and determines the road link where the current position exists. Map matching unit to be identified, route search unit to search for a route from the current position specified by the map matching unit to the destination set by the occupant, the route searched by the route search unit, and the position of the intersection included in the road map data A route guidance unit that calculates a route necessary for route guidance based on data and the like, and a drawing unit that draws a map around the current position, a schematic diagram of an expressway, an enlarged view near an intersection, and the like are provided.

  In addition, the control unit 3 periodically transmits probe data with the current position, direction, and vehicle speed as one unit from the communication device 7 to the center device 2 via the mobile communication network, and the traffic jam distributed from the center device 2 When the information (traffic congestion line) is received by the communication device 7, the received traffic congestion information is displayed superimposed on the road link of the road map data read from the recording medium 13. In addition, the vehicle on which the vehicle-mounted navigation device 1 configured as described above is mounted may not be a vehicle that has a particularly limited application.

  The center device 2 includes a control unit 17, a probe data receiving unit 18 that receives probe data transmitted from the in-vehicle navigation device 1, a traffic information distribution unit 19 that distributes traffic information, a road map database 20 that stores road map data, It is configured with a traffic information database 21 for storing traffic information. The control unit 17 includes a CPU, a RAM, a ROM, and an I / O bus. The control unit 17 includes a known microcomputer, and controls the operation of the entire apparatus by executing a control program.

  In this case, when the probe data transmitted from the in-vehicle navigation device 1 is received by the probe data receiving unit 18, the control unit 17 extracts the current position and direction from the received probe data and sets the extracted current position and direction to the current position and direction. Corresponding road map data is read from the road map database 20, and the current position is map-matched to the road link of the road map data read from the road map database 20. Further, the control unit 17 extracts the vehicle speed from the probe data, and specifies the traffic jam information according to the extracted vehicle speed with respect to the road link map-matched to the current position.

  Specifically, if the vehicle speed extracted from the probe data is “less than 10 km / h”, the road link is identified as “congested”, and if the vehicle speed is “less than 20 km / h”, the road link is “congested”. If the vehicle speed is “20 km / h or more”, the road link is specified as “empty road”. Then, every time the traffic jam information is identified in this way, the control unit 17 writes the correspondence between the identified traffic jam information and the road link in the traffic jam information database 21 and updates the traffic jam information database 21. The traffic information is distributed from the traffic information distribution unit 19 to the in-vehicle navigation device 1.

  In the in-vehicle navigation device 1, when the communication device 7 receives the traffic information distributed from the center device 2, the control unit 3 reads the road link of the road map data on which the received traffic information is superimposed from the recording medium 13, The received traffic information is superimposed on the road link of the corresponding road map data and displayed on the display device 9. In this case, the control unit 3 displays the traffic jam information received from the center device 2 with different display modes (for example, display colors) according to the level of the traffic jam.

  Specifically, if the traffic jam information received from the center device 2 is “traffic jam” indicating that the degree of the traffic jam is large, the control unit 3 displays the traffic jam information in red and the traffic jam received from the center device 2. If the information is “congested” indicating that the degree of traffic jam is intermediate, the traffic jam information is displayed in orange, and the traffic information received from the center device 2 is “empty road” indicating that the level of traffic jam is small. If so, the traffic information is displayed in yellow. That is, the driver can confirm the size of the degree of traffic jam by confirming the display color of the displayed traffic jam information.

Next, the operation of the above configuration will be described with reference to FIGS. In the in-vehicle navigation device 1, when the traffic information received from the center device 2 is superimposed on the road link of the road map data, the control unit 3 displays the traffic information when a predetermined condition described later is satisfied. Is displayed or traffic information is displayed by changing the display mode indicating the degree of traffic jam. here,
(1) Processing for hiding traffic jam information (2) Processing for displaying traffic jam information by changing the display mode representing the degree of traffic jam will be sequentially described.

(1) Process for hiding traffic jam information First, the process for hiding traffic jam information will be described with reference to FIGS.
In the in-vehicle navigation device 1, the control unit 3 determines whether or not the traffic information transmitted from the center device 2 has been received by the communication device 7 (step S <b> 1), and the traffic information transmitted from the center device 2 is determined. If it is determined that the communication device 7 has received it ("YES" in step S1), the road map data stored in the recording medium 13 is searched, and the road link of the road map data on which the received traffic jam information is superimposed is searched. The road type of the road link that is read from the recording medium 13 and corresponds to the received traffic jam information (the traffic jam information is superimposed) is acquired (step S2). Here, the road type is classified into, for example, a highway, a general road, an attachment road, a narrow street, or a rotary.

  Next, the control unit 3 determines whether or not the road type of the road link corresponding to the received traffic jam information is a specific road (step S3), and the road type of the road link corresponding to the received traffic jam information is determined. If it is determined that the road is a specific road (“YES” in step S3), the length of the received traffic jam information is acquired (step S4), and whether the length of the received traffic jam information is within a predetermined distance or not. Is determined (step S5). When the control unit 3 determines that the length of the received traffic jam information is within a predetermined distance (“YES” in step S5), the control unit 3 hides (decimates) the received traffic jam information (step). S6).

  On the other hand, if the control unit 3 determines that the road type of the road link corresponding to the received traffic jam information is not a specific road ("NO" in step S3), or responds to the received traffic jam information Even if the road type of the road link to be performed is a specific road, if it is determined that the length of the traffic jam information is not within the predetermined distance (“NO” in step S5), the traffic jam information received from the center device 2 is displayed on the display device 9. (Step S7).

  More specifically, as shown in FIG. 4, the road type of the road link a among the road links a to c having received the congestion information from the center device 2 is a specific road (for example, a narrow street) and the length of the congestion information. Is within a predetermined distance, and if the road type of the road links b and c is a road other than the specific road (for example, a general road), the control unit 3 invalidates the traffic jam information about the road link a, and FIG. As shown in b), the traffic information corresponding to the road links b and c is displayed on the display device 9, but the traffic information corresponding to the road link a is not displayed. In this embodiment, in addition to the narrow streets, the attachment road and the roundabout are specific roads, and in addition to the general road, the highway is a road other than the specific road.

(2) Processing for displaying traffic information by changing the display mode representing the degree of traffic congestion Next, processing for displaying traffic information by changing the display mode representing the level of traffic jam will be described with reference to FIGS. I will explain.

  In this case, the control unit 3 determines that the road type of the road link corresponding to the received traffic jam information is a specific road (“YES” in step S3), and the length of the received traffic jam information is a predetermined distance. If it is determined that it is within the range (“YES” in step S5), the degree of traffic jam information is acquired, and the received traffic information is displayed on the display device 9 by changing the display mode indicating the traffic jam level. (Step S11).

  Specifically, as shown in FIG. 7, in this case as well, the road type of the road link a among the road links a to c having received the traffic jam information from the center device 2 is a specific road (for example, a narrow street) and If the length of the traffic jam information is within a predetermined distance and the road type of the road links b and c is a road other than a specific road (for example, a general road), the control unit 3 displays the traffic jam information for the road link a. As shown in FIG. 8B, the traffic information corresponding to the road links b and c is displayed on the display device 9, but the traffic information corresponding to the road link a is displayed in a display mode indicating the degree of traffic jam. Change and display on the display device 9. In this case, how to change the display mode indicating the degree of traffic jam is set in advance according to the correspondence between the road type and the traffic jam level.

  That is, for example, if the road type is a narrow street and the degree of congestion is “congested”, the control unit 3 changes the degree of congestion from “congested” to “congested” (the display color of the congestion information is orange) Change the color of the traffic from “congested” to “empty road” if the road type is rotary and the level of traffic is “congested”. (Change the traffic color information display color from orange to yellow) to display the traffic information.

  By the way, as described above, (1) the process of hiding the traffic jam information and (2) the process of displaying the traffic jam information by changing the display mode indicating the degree of the traffic jam have been described separately. These processes may be performed together. That is, as shown in FIG. 9, the control unit 3 holds a table indicating a display method for each correspondence relationship between the road type and the degree of congestion, and determines the correspondence relationship between the road type and the degree of congestion. To determine whether to display the traffic information or not, or to change the display mode indicating the degree of the traffic.

  As described above, according to the present embodiment, in the in-vehicle navigation device 1, when the relationship between the traffic information received from the center device 2 and the road link on which the traffic information is superimposed satisfies a predetermined condition, the traffic information is not displayed. Since it is configured to display or change the display mode indicating the degree of traffic jam, it is received from the center device 2 instead of displaying all the large amount of traffic jam information received from the center device 2 as it is. By hiding a part of the traffic jam information or by changing the display mode, the traffic jam information received from the center device 2 can be displayed in an appropriate display mode, and meaningful traffic jam information can be displayed to the driver. Can be provided.

  In this case, the road type of the road link is determined, and when the road type of the road link is a specific road, the congestion information is not displayed or the display mode indicating the degree of the congestion is changed and displayed. Therefore, by setting, for example, an attachment road, a narrow street, and a roundabout as a specific road in advance, traffic information can be displayed normally for an expressway, a general road, etc. For roads, narrow streets, and roundabouts, it is possible to hide the traffic information or change the display mode indicating the level of traffic.

  In addition, when the traffic information is hidden or when the display mode indicating the degree of traffic is changed and displayed, the length of the traffic information is within a specified distance. Concerning traffic jam information, it is possible to hide the traffic jam information within the range where it is advantageous for the driver to hide the traffic jam information or to display it by changing the display mode indicating the traffic jam level. The display mode can be changed and displayed, and for traffic jam information whose length exceeds the predetermined distance, the traffic jam information is not displayed or the display mode representing the degree of traffic jam is changed and displayed. It is possible to prevent the driver from being confused by doing so.

The present invention is not limited to the above-described embodiment, and can be modified or expanded as follows.
The predetermined distance, which is a criterion for determining whether to hide the traffic information or change the display mode indicating the degree of traffic congestion, may be a value that can be freely set by the driver, It may be a value that is fixedly set when the vehicle is manufactured or sold, or may be a value that is variably set according to the learning result if the control unit has a learning function. . The configuration may be such that the condition that the length of the traffic jam information is within a predetermined distance is omitted. That is, if the road type of the road link corresponding to the traffic jam information received from the center device is a specific road, the traffic jam information Regardless of the length, the configuration may be such that the traffic information is not displayed or the display mode indicating the degree of traffic is changed and displayed.
The classification of the road type is not limited to the classification of an expressway, a general road, an attachment road, a narrow street, or a roundabout, but may be a classification of, for example, a bridge, a tunnel, or an elevated road.

The one which shows one Embodiment of this invention, and is a figure which shows the whole structure of a system Functional block diagram of in-vehicle navigation system flowchart The figure which shows the aspect which hides traffic jam information Figure showing the display screen 3 equivalent figure The figure which shows the aspect which changes the display mode showing the degree of traffic jam, and displays traffic information Figure equivalent to FIG. The figure which shows the display method for every correspondence of road classification and the degree of traffic jam

Explanation of symbols

  In the drawings, 1 is an in-vehicle navigation device (congestion information display device), 2 is a center device, 3 is a control unit (control means), 5 is a road map data input device (road map data reading means), and 7 is a communication device (congestion). Information receiving means), 9 is a display device (display means), and 13 is a recording medium (road map data storage means).

Claims (7)

Traffic information receiving means for receiving traffic information of a predetermined length representing the degree of traffic congestion from the center device, road map data reading means for reading road map data from the road map data storage means, and the traffic information receiving means A traffic information display device comprising: control means capable of superimposing traffic information on a road link of road map data read from the road map data storage means by the road map data reading means and displaying the traffic information on a display means;
The control means hides the traffic information when a relationship between the traffic information received by the traffic information receiving means and a road link on which the traffic information is superimposed satisfies a predetermined condition. Characteristic traffic information display device. In the traffic information display device according to claim 1,
The control means determines a road type of a road link on which the traffic information received by the traffic information receiving means is superimposed, and hides the traffic information when the road type of the road link is a specific road. A traffic information display device characterized by the above. In the traffic jam information display device according to claim 2,
The control means also determines the length of the traffic jam information received by the traffic jam information receiving means, and when the road type of the road link is a specific road and the length of the traffic jam information is within a predetermined distance, The traffic jam information display device, wherein the traffic jam information is hidden. Traffic information receiving means for receiving traffic information of a predetermined length representing the degree of traffic congestion from the center device, road map data reading means for reading road map data from the road map data storage means, and the traffic information receiving means A traffic information display device comprising: control means capable of superimposing traffic information on a road link of road map data read from the road map data storage means by the road map data reading means and displaying the traffic information on a display means;
When the relationship between the traffic jam information received by the traffic jam information receiving unit and the road link on which the traffic jam information is superimposed satisfies a predetermined condition, the control unit changes the display mode indicating the level of the traffic jam to the traffic jam information. A traffic jam information display device characterized in that the traffic information is displayed on the display means. In the traffic jam information display device according to claim 4,
The control means determines a road type of a road link on which the traffic information received by the traffic information receiving means is superimposed, and when the road type of the road link is a specific road, the traffic information represents a degree of traffic congestion. A traffic jam information display device, wherein a display mode is changed and displayed on the display means. In the traffic information display device according to claim 5,
The control means also determines the length of the traffic jam information received by the traffic jam information receiving means, and when the road type of the road link is a specific road and the length of the traffic jam information is within a predetermined distance, A traffic jam information display apparatus, wherein the traffic information is displayed on the display means by changing a display mode indicating a traffic jam level. In the traffic jam information display device according to any one of claims 2, 3, 5 and 6,
The control means causes the display means to display the traffic jam information in an initial state when the length of the traffic jam information is not within a predetermined distance even if the road type of the road link is a specific road. A traffic information display device characterized by that.

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