JPH08339492A - Navigation device for vehicle - Google Patents

Abstract

PURPOSE: To prevent obsolete traffic information from being guided improperly by making an indication for urging a choice of a broadcasting station for traffic information unless stored traffic information is updated for a certain time, and automatically tuning the device to the broadcasting station for traffic information. CONSTITUTION: Under the control of a control processor 1, it is decided whether or not traffic information stored in the respective internal memories of an FM multiplex broadcast receiver 9, a radio wave beacon receiver 11, and a light beacon receiver 14 are updated for longer than the specific time, and when the information is not updated for longer than the specific time, an indication for a choice of the broadcasting station for traffic information is made. Under the control of the control processor 4, the traffic information is erased unless the traffic information is updated for longer than the specific time. At this time, the information of notices for the erasure of the traffic information is made under the control of the control processor 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular navigation device that receives traffic information that is updated and broadcast every moment, and that uses the received traffic information to provide predetermined guidance.

[0002]

2. Description of the Related Art Recently, there has been a vehicle navigation device that finds the position of a vehicle on a road map and displays the current position of the vehicle on the road map displayed on the screen. Has been developed, which receives a traffic information broadcast whose position is specified and displays the traffic jam location and the like symbolically at a predetermined position on a road map on a navigation screen (Japanese Patent Laid-Open No. Hei 5 (1993) -58). 28
397).

Also, recently, while displaying the current position of the vehicle on a road map displayed on the screen, the travel distance and travel time from the current position of the vehicle on the road map to the destination are minimized. Automatically search for the optimal route to
In a vehicular navigation device that is configured to guide the travel guidance of the own vehicle according to the searched route, receives and stores a broadcast of traffic information in which a position such as road congestion or construction regulation is specified, A system is being developed in which the stored traffic information is used to search for an optimum route. Then, when the stored traffic information is not updated for a predetermined time or longer, the stored traffic information is erased so that guidance based on the outdated traffic information is not provided (Japanese Patent Laid-Open No. 5-61409). (See the official gazette).

[0004]

The problem to be solved is to receive and store traffic information that is updated and broadcast every moment, and use the stored traffic information to give a predetermined guidance. In this case, if the stored traffic information becomes old without being updated forever, the guidance provided using the traffic information will be inappropriate. Then, there is a problem that proper guidance based on the latest traffic information cannot be provided only by deleting old traffic information that is not updated forever.

[0005]

DISCLOSURE OF THE INVENTION The present invention relates to a vehicle navigation device for receiving traffic information transmitted from an FM multiplex broadcasting station and performing a predetermined guidance based on the received traffic information. A storage unit for storing the received traffic information together with the update time thereof so as to request the update of the traffic information when the received and stored traffic information becomes obsolete without being updated forever, and the stored traffic. And means for deciding whether or not the information is updated for a predetermined time or more, and means for urging a manual selection to an FM multiplex broadcasting station transmitting the traffic information when the stored traffic information is not updated for a predetermined time or more. I am trying.

Further, the present invention is a vehicle navigation device which receives traffic information transmitted from an FM multiplex broadcasting station and performs a predetermined guidance based on the received traffic information, and first receives and stores the traffic information. Storage means for storing the received traffic information together with the update time thereof so as to forcefully update the traffic information when the held traffic information becomes obsolete without being updated forever, and the stored traffic information. And a means for automatically selecting the FM multiplex broadcasting station transmitting the traffic information when the stored traffic information is not updated for a predetermined time or longer. There is.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of the configuration of a vehicle navigation device according to the present invention. Here, the current position is displayed on the road map displayed on the screen by obtaining the position of the vehicle on the road map. When receiving, traffic information that is updated and updated every moment is received, stored and stored, and the stored traffic information is used to display a symbol such as a traffic jam at a predetermined position on the road map on the navigation screen. I am trying to guide the driver.

Obtaining the position of the vehicle on the road map,
This is a general vehicle navigation device itself that displays the current position of the vehicle on the road map displayed on the screen, and detects the distance detector 1 that detects the traveling distance of the vehicle and the traveling direction of the vehicle. Direction detector 2 and GPS receiver 3
And the current position on the XY coordinates of the vehicle based on the traveling distance of the vehicle detected by the distance detector 1 and the traveling direction of the vehicle detected by the direction detector 2 are sequentially obtained by cumulative calculation processing. , Or XY of the vehicle based on the position information obtained from the reception signal of the GPS receiver 3.
A control processing device 4 including a microcomputer that calculates the current position on the coordinates and controls the whole, a map information storage medium 5 in which road map information based on digital map data is stored in advance, and the storage medium 5 A storage medium reproducing device 6 for selectively reading out road map information of a necessary area, and displaying a predetermined road map on the screen based on the read road map information, and displaying on the road map displayed on the screen. , Mark the current position of your vehicle,
A display device 7 that displays the traveling state of the vehicle along with the traveling direction mark of the vehicle at that position and an input command to the signal processing device 4 to select and specify a map to be displayed on the display device 7, and display the map. It is possible to change the setting of the scale factor and arbitrarily set the starting point and the destination of the vehicle on the displayed map, and to perform various input operations such as selectively giving a display command of the traveling locus. And an operating device 8 that can be used.

With the above-described structure, the selectively read road map is displayed on the screen of the display device 7, and a signal is displayed according to the running of the vehicle from the starting point set on the map. The processor 4 obtains the current position on the XY coordinates according to the preset map display scale, and the data of each obtained position is accumulated and held in the internal memory to obtain the traveling locus. Go.

The current position on the road map is calculated by a predetermined calculation process while detecting the traveling distance and the traveling direction of the vehicle, and is calculated by the calculation process while measuring the current position by the GPS receiver 3. By periodically correcting the cumulative error of the position according to the measurement result by the GPS receiver 3, or by adopting the position obtained by the arithmetic processing when the position measurement by the GPS receiver 3 is impossible, Complementary is required.

In the present invention, the FM receiving the traffic information by the FM multiplex broadcasting from the broadcasting station is as follows.
A broadcast receiver 9, a radio wave beacon receiver 11 for receiving traffic information by a radio wave beacon transmitted from a road facility through a beacon antenna 10, and a light receiver 12 and an amplifier for traffic information by a light beacon transmitted from the road facility. 1
3 is provided with an optical beacon receiver 14 for receiving via the communication system 3, and the control and processing functions of the control processing device 4 are expanded so that the received traffic information can be displayed on the navigation screen in an overlapping manner. I have to.

[0012] The traffic information includes information such as traffic congestion on roads and construction regulations, vacant information about parking lots, and the type, content, and position of the information.

Then, the traffic information is regularly updated at a traffic information center (not shown) and is broadcast together with the update time.

Each of the FM multiplex broadcast receiver 9, the radio wave beacon receiver 11 and the optical beacon receiver 14 has a built-in computer, and when the radio wave intensity of the FM multiplex broadcast is high and the signal is ready to be received by passing the beacon. The traffic information is received at any time, and the received traffic information is stored in the internal memory.

In FM multiplex broadcasting, traffic information such as traffic jams, traffic restrictions, parking information, and general information such as news and weather forecasts are digitally signaled by using empty portions of ordinary FM broadcasting (audio broadcasting). The FM multiplex broadcasting receiver 9 can receive traffic information and general information when the FM broadcasting is selected.

FIG. 2 shows a display example of a screen in the FM broadcasting station tuning mode. In response to a FM broadcasting station tuning command from the operation device 8, the control processing unit 4 under its control. , A touch switch SW1 for selecting each of the FM broadcasting stations A, B, and C that can be selected on the screen of the display device 7 based on the information of the FM broadcasting stations that can be selected from the FM multiplex broadcasting receiver 9. , SW2, SW3 are displayed, and the broadcast contents of the FM broadcast station selected by the touch switch are displayed on the display section D. In the figure, S-SW is a setting switch for channel selection, and R-SW is a return switch for returning to the previous channel selection state.

Here, the FM broadcasting stations A and FM are used.
Broadcasting station B broadcasts regular information and traffic information.
Broadcasting station C broadcasts normal broadcasting and general information.

Each of the FM multiplex broadcast receiver 9, the radio wave beacon receiver 11 and the optical beacon receiver 14 is updated and stored in the internal memory when the control processor 4 requests traffic information. The traffic information being sent is sent to the control processing device 4.

The FM multiplex broadcasting station transmits traffic information in a wide area, and the radio wave beacon and the optical beacon transmit traffic information in a relatively narrow area centered on the area where the beacon exists.
Therefore, the control processing device 4 uses the FM multiplex broadcast receiver 9,
When the reception data stored in the radio beacon receiver 11 and the optical beacon receiver 14 are compared with each other, and when traffic information is received by a plurality of receivers in the same area, the traffic information is updated most among them. Use traffic information with a new time.

At this time, since the FM multiplex broadcast receiver 9, the radio wave beacon receiver 11 and the optical beacon receiver 14 are receiving the traffic information on a regional basis, when the traffic information is requested, each receiver receives the current area. When the traffic information in is sent, select the latest one,
Further, when traffic information in different areas is sent from each receiver, the traffic information in the current area is adopted.

Now, when a traffic information display instruction is given from the operation device 8 (including a touch switch provided on the screen), the control processing device 4 enters the traffic information display mode,
The latest traffic information received by the FM broadcast receiver 9, the traffic information received by the radio wave beacon receiver 11 or the traffic information received by the optical beacon receiver 14 is selected, and based on the selected traffic information. Each symbol corresponding to the type of traffic information is displayed at a predetermined location on the road map displayed on the screen of the display device 7.

At this time, when a traffic information display command is given from the operation device 8, the control processing device 4 causes, for example, as shown in FIG. The symbols SA ₁ , SA ₂ and SB of the respective received traffic information are displayed at predetermined locations. here,
The symbol SA indicates a traffic jam location, and the symbol SB indicates a traffic closure location.

[0023] In the display state of the screen like, by an input operation of the operation device 8, for example, specifying a symbol SA _1, the signal processing device 4, as shown in FIG. 4, the specified symbol SA ₁ such as by raising the brightness or changing the color of the display to indicate that the symbol SA ₁ is selected by changing the display form of the symbol SA _1.

Then, the content of the traffic information corresponding to the symbol SA ₁ is displayed in the lower right corner of the screen, for example, "accident traffic jam 2 km, transit time 10 minutes".

The contents of the traffic information corresponding to the selected symbol SA ₁ may be output by voice.

According to the present invention, in particular, according to the present invention, under the control of the control processing device 4, it is stored in each internal memory of the FM multiplex broadcast receiver 9, the radio wave beacon receiver 11 and the optical beacon receiver 14. It is determined whether the traffic information being updated is not updated for a certain period of time or more, and when the traffic information is not updated for a certain period of time or more, a notification that prompts the broadcast station to select the traffic information is performed.

Further, according to the present invention, under the control of the control processing device 4, when the traffic information is not updated for a certain time or more, the traffic information is erased.

At this time, according to the present invention, under the control of the control processing device 4, a notice for erasing the traffic information is given.

FIG. 5 shows a flow of traffic information processing performed by the control processing device 4. The specific processing will be described below according to this flow.

First, the control processing device 4 determines whether or not it is in the traffic information display mode (step 1), and if it is the traffic information display mode, the traffic information necessary for display is the FM multiplex broadcast receiver 9. Then, it is determined whether or not it is stored in each internal memory of the radio beacon receiver 11 or the optical beacon receiver 14 (step 2). If the mode is not the traffic information display mode, the process ends.

Here, if the traffic information is stored, the latest traffic information is selected, and the latest traffic information is updated, for example, as shown in FIG.
The present position P of the vehicle is displayed together with "00 present" on the map (step 3).

At this time, when the traffic information stored in the internal memory of the FM multiplex broadcasting receiver 9 is selected, the data of the selected FM broadcasting station is set to "82.
5 MHz FM-A traffic information ”is displayed.

When no traffic information is stored in any of the FM multiplex broadcast receiver 9, the radio wave beacon receiver 11, and the optical beacon receiver 14, as shown in FIG. 6, the traffic information to be displayed is displayed. Is displayed (step 4), and the process ends.

Next, the control processing device 4 determines whether the traffic information has been updated for a predetermined time (30 minutes) based on the displayed traffic information providing time (step 5), and updates the traffic information. If so, the process ends.

At this time, if it has not been updated for a predetermined time, it is judged whether or not the FM broadcast of the traffic information is being selected (step 6).

If the FM broadcast of the traffic information is being selected, the control processing device 4 displays a notice indicating that the traffic information received by the FM multiplex broadcast receiver 9 will be deleted as shown in FIG. 7 ( After the step 7), the traffic information is erased (step 8), and the process ends.

At this time, not only is the stored data in the internal memory of the FM multiplex broadcast receiver 9 erased, but a predetermined time (30 minutes) stored in the internal memory of each of the radio beacon receiver 11 and the optical beacon receiver 14 is also deleted. ) You may make it delete the traffic information which passed above.

Unless the FM broadcast of traffic information is being selected,
It is determined whether there is a broadcasting station that can receive the traffic information (step 9). Specifically, FM that broadcasts traffic information
This is done by checking the list from among the stations. The pre-search is performed, for example, when the power of the FM multiplex broadcast receiver 9 is turned on and thereafter at regular intervals.

If there is an FM broadcasting station that can receive the traffic information, as shown in FIG. 8, the FM broadcasting station for the traffic information is urged to notify that the traffic information can be updated (step 10). ), After that, a notice indicating that the display of the traffic information is deleted is displayed (step 7), the traffic information is deleted (step 8), and the process is ended. When the tuning is prompted, the driver knows that the traffic information is outdated, and can start the tuning screen of FIG. 2 and select the broadcasting station of the traffic information if necessary.

If there is no receivable broadcasting station, the control processing device 4 displays a notice indicating that the display of the traffic information is to be erased (step 7), and then the traffic information is erased (step 8), and then the processing is performed. To finish.

FIG. 10 shows a case according to another embodiment of the present invention. In this case, the control processor 4 is provided with an automatic channel selection function, and when the traffic information is not updated for a predetermined time or longer, the FM is displayed. By controlling the multiplex broadcast receiver 9, the traffic information is automatically received.

Here, step 10, step 11 and step 12 are modified from the flowchart of FIG. 5, and the description of the same parts will be omitted.

When there is a receivable station for traffic information (step 9), as shown in FIG. 9, a message for automatically selecting a broadcasting station for traffic information is displayed (step 10), and the automatic tuning is selected. If the touch switch T-SW to be stopped has not been operated for a predetermined time or longer (step 11), the broadcast station of the traffic information is selected (step 12).

At this time, if it is desired to continue receiving the normal broadcasting station (audio broadcasting) currently selected, the touch switch T
By operating the SW, it is possible to stop the automatic selection of the traffic information broadcasting station (step 11). In this case, since the traffic information is still old, the traffic information is erased (step 7) after giving notice of the erasing of the traffic information display (step 7).

Further, the present invention is not limited to the case where the received traffic information is displayed as a symbol on the navigation screen which displays the current position of the vehicle on the road map displayed on the screen, and guidance is provided. It goes without saying that the same applies to the case of searching for the optimum route from the current position of the vehicle on the road map to the destination using the traffic information regarding traffic jams and traffic closures.

[0046]

As described above, according to the vehicular navigation device of the present invention, the traffic information that is updated and broadcast every moment is received and temporarily stored, and if necessary, the stored traffic information is used to determine a predetermined value. When the stored traffic information has not been updated for a certain period of time, the traffic information broadcast station will be automatically selected. By doing so, the user can be made aware that the stored traffic information is obsolete, and it is possible to prevent inappropriate guidance using the obsolete traffic information. Then, the traffic information used for guidance can be updated to the latest information by the channel selection or the automatic channel selection according to the notification prompting the channel selection, and the guidance using the latest traffic information can always be appropriately performed. become able to.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration example of a vehicle navigation device according to the present invention.

FIG. 2 is a diagram showing a display example of a screen in a channel selection mode of an FM multiplex broadcasting station.

FIG. 3 is a diagram showing an example in which received traffic information is symbolically displayed on a navigation screen.

FIG. 4 is a diagram showing an example of a display state of contents of traffic information according to a selected symbol.

FIG. 5 is a diagram illustrating an example of a flow of processing of traffic information in the control processing device.

FIG. 6 is a diagram showing an example of a display state of a screen when traffic information is not stored.

FIG. 7 is a diagram illustrating an example of a display state of a screen when a notice display to delete traffic information is displayed.

FIG. 8 is a diagram showing an example of a display state of a screen when a message indicating that the traffic information can be updated by FM broadcasting is urged to be displayed.

FIG. 9 is a diagram showing an example of a display state of a screen when a message indicating that an FM broadcast of traffic information is automatically selected is displayed.

FIG. 10 is a diagram showing another example of the flow of processing of traffic information in the control processing device.

[Explanation of symbols]

 1 distance detector 2 direction detector 3 GPS receiver 4 signal processing device 5 map information storage medium 6 storage medium reproducing device 7 display device 8 operating device 9 FM broadcast receiver 10 beacon antenna 11 radio wave beacon receiver 12 light receiver 13 amplifier 14 Optical beacon receiver

Claims (2)

[Claims] 1. A vehicle navigation device that receives traffic information transmitted from an FM multiplex broadcasting station and provides predetermined guidance based on the received traffic information, and stores the received traffic information together with its update time. Storage means for determining whether or not the stored traffic information is updated for a predetermined time or more, and transmitting the traffic information when the stored traffic information is not updated for a predetermined time or more F
A vehicle navigation device comprising means for prompting manual selection to an M multiplex broadcasting station. 2. A vehicle navigation device that receives traffic information transmitted from an FM multiplex broadcasting station and provides predetermined guidance based on the received traffic information, and stores the received traffic information together with its update time. Storage means for determining whether or not the stored traffic information is updated for a predetermined time or more, and transmitting the traffic information when the stored traffic information is not updated for a predetermined time or more F
A vehicle navigation system comprising means for automatically selecting an M multiplex broadcasting station.