JP2000039332A - Running guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guide running by properly a voiding traffic information without confirming the received traffic information every time during guiding running. SOLUTION: When traffic information, jam information, road state information, etc., are received (S14) with a transceiver 8, whether the position that the traffic information is generated is on the path of the self car or not is judged (S150). If the position is on the running path (S150: yes), a new running path bypassing the path concerning the traffic information is recalculated (S160) and the car is guided following the new running path. By this, running guide is performed by properly avoiding the traffic information without confirming the received traffic information every time. Thus, such traffic control as avoiding a rear-end collision of a following car, avoiding traffic jam by leading to a bypass can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a travel guide device having a function of receiving traffic information such as accident information, traffic congestion, and road surface information and appropriately changing and setting a travel route.

[0002]

2. Description of the Related Art Conventionally, in addition to displaying the position of a vehicle on a road map displayed on a display screen, traffic information such as traffic congestion is received from outside the vehicle, and the traffic information is additionally displayed. 2. Description of the Related Art There is an information display device that allows the user to understand the road traffic situation in the vicinity as well as the position of the vehicle.

[0003]

However, although the conventional information display device can recognize the road traffic situation around the own vehicle, the information display device is required to determine how the information is related to the position of the own vehicle. The driver needed to confirm.

[0004] Under such circumstances, especially when traveling guidance is performed according to a traveling route set in advance, the driver must first select only information necessary for traveling from various information. After making a selection, you must consider a countermeasure. As a result, it is difficult to take a quick response.

[0005] If confirmation of received information is inadequate or delayed, a situation may arise in which traffic jams occur, or on the contrary, traffic jams increase.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a travel guidance apparatus that can appropriately avoid traffic information and provide travel guidance without confirming received traffic information during travel guidance. The purpose is to do.

[0007]

To achieve the above object, according to the first aspect of the present invention, there is provided a route calculating means for calculating a travel route to a set destination, and the route calculating means. Navigation means for providing travel guidance in accordance with the travel route calculated by the means, receiving means for receiving traffic information from the outside, and traffic information received by the receiving means, the travel route calculated by the route calculation means If the information is considered relevant,
Means for causing the route calculation means to calculate a new travel route that bypasses at least the route related to the traffic information, and causing the navigation means to perform travel guidance according to the calculated new route. I do.

Therefore, during the traveling guidance, the traveling guidance can be performed by avoiding the traffic information as appropriate without checking the received traffic information. Therefore, there is an effect of improving traffic control, such as avoiding a rear-end collision of a following vehicle and avoiding congestion by promoting detour.

Here, the received external traffic information includes accident information, traffic congestion information, or road surface information as described in claim 2. For example, the collision is automatically detected using an acceleration sensor or the like, and the information is transmitted.Or, the user can obtain various traffic information such as traffic congestion and road freezing, for example, average vehicle speed, wheel slip, and the like. The data may be automatically calculated from the rate or the like and transmitted.

[0010] According to a third aspect of the present invention, the apparatus further includes a notifying unit for displaying or relating to the contents related to the external traffic information received by the receiving unit by display or sound. Therefore, even if there is a sudden route change, the reason can be recognized.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of a travel guide device according to one embodiment of the present invention. The information display device includes a position detector 1, a map data input device 2, an operation switch 3, an emergency detector 4, and a CPU connected thereto.
5, and a memory 6, a display 7, and a transceiver 8 connected to the CPU 5.

The position detector 1 includes a well-known geomagnetic sensor 11.
And a gyroscope 13, a distance sensor 15, and a GPS receiver 17 for a GPS (Global Positioning System) that receives radio waves from satellites and detects the position of the vehicle based on the received radio waves. The GPS receiver 17 has a GPS antenna 19 that receives a signal wave transmitted from a GPS transmitter mounted on a GPS satellite (not shown).

These sensors and the like 11, 13, 15, 17
Since each has an error having a different property, it is configured to be used while being interpolated by a plurality of sensors. It should be noted that depending on the accuracy, it may be constituted by a part of the above, and furthermore, a rotation sensor for the steering wheel, a wheel sensor for the rotating wheels, or the like may be used.

The map data input device 2 is a device for inputting so-called map matching data and various data including map data and route guidance for improving the accuracy of position detection. As a medium, the CDR
Although OM is generally used, another medium such as a memory card may be used.

The position detector 1, the map data input device 2, the operation switch 3, the CPU 5, the display 7, etc. constitute a so-called navigation device. The display 7 can display the position information of the vehicle input from the position detector 1 and the map data input from the map data input unit 2 in a superimposed manner. The navigation device also has a so-called route guidance function for guiding and displaying a typical route from the current position to the destination when a destination is input by the operation switch 3. The operation switch 3 is, for example,
A touch switch or a mechanical switch integrated with the display 7 is used for various inputs.

The emergency detector 4 includes a collision sensor 41 and an emergency switch 43. The collision sensor 41 detects a sudden change in acceleration to detect a collision of a vehicle, which is an example of traffic information. For example, if the vehicle has an airbag, a signal from a G sensor for the airbag is used. Alternatively, it is easy to divert a deployment signal indicating that the airbag has been activated. The emergency switch 43 enables the driver to manually input an emergency state.

The position information of the vehicle detected by the position detector 1 and the collision information of the vehicle detected by the emergency detector 4 are transmitted to the communication satellite CS shown in FIG. Can be sent to Further, information on other vehicles transmitted from the communication satellite CS can be received via the transmitting / receiving antenna 9.

Next, the operation of the present embodiment will be described with reference to the flowcharts of FIGS. In the present embodiment, by executing the traffic information transmission / reception control processing, a map display in the navigation system can be performed at the same time. When this processing is started, first, the position detector 1
The current position of the vehicle is calculated from the detection data constantly input from (Step 100, hereinafter simply referred to as S100).
The same applies hereinafter. ), Map data from the map data input device 2,
Alternatively, when a traveling route is set in advance, display data including a route guidance mark or the like according to the traveling route is created (S110).

When the destination is input by the operation switch 3, the travel route is calculated by the route calculation routine shown in FIG.
A representative route from the current position to the destination, for example, a route having the shortest distance is calculated (S300). This calculation is performed by the Dijkstra method or the like based on a database including a road link length, a road width, traffic regulations, and the like.

Next, it is determined whether or not a detection signal is input from the emergency detector 4 (S120). If the detection signal is input, the position information calculated in S100 and the emergency code of the detection signal are determined. Is transmitted from the transceiver 8 (S13).
0). The emergency code is, for example, a code that can distinguish between a collision detection signal from the collision sensor 41 and a signal from the emergency switch 43, and when there are a plurality of types of emergency switches 43, these can be distinguished.

The processing ends as the transmitting side by the processing up to S130. The position information and the emergency code transmitted via the transceiver 8 and the transmitting / receiving antenna 9 are transmitted to a communication satellite (not shown), and transmitted from the communication satellite to the ground. When the position information and the emergency code from the other vehicle are received (S140), it is determined based on the position information whether the position where the information is transmitted is located on the traveling route of the own vehicle (S140). S150).

If there is an information transmission position on the set traveling route (S150; YES), a new traveling route that reaches the destination by bypassing the information transmission position is recalculated and created in S110. The display data is created again (S160). Regarding the recalculation of the travel route, for example, in the route calculation (S300) of the above-described route calculation routine, it is possible to calculate as a state where traffic regulation is added to a certain link in the database. Then, the received position information and the reception time are stored in the memory 6 (S170).

Next, it is determined whether or not the position information is stored in the memory 6 (S180). If the position information is stored, it is within a predetermined time (T time) from the last reception of the position information. Is determined (S190).
If it is within T hours after the last reception (S190: YE
S), an accident occurrence mark M1 shown in FIG. 6A is added to the display data (S200).

Further, it is determined whether or not the information transmission position is within the display area of the display 7 (S210). If it is within the display area, the information transmission position shown in FIG. Is added to the map data (S220). Then, the display data is displayed on the display 7 (S230), and the process returns to S100 to repeat the following processing.

FIG. 7A shows an example of display using display data before receiving collision data. FIG. 7B shows that the information transmission position is outside the display area of the display 7 and the accident occurrence mark M1 is displayed. A display example based on the display data to which only “A” is added is shown.
In FIG. 7C, the information transmission position is within the display area of the display 7, and the accident occurrence mark M1 and the accident position mark M2 are shown.
Shows a display example based on the display data added together. FIG.
In (b) and (c), a route guidance mark based on the new travel route recalculated in S160 is displayed.

On the other hand, when no traveling route is set,
Alternatively, even if it is set, if there is no information transmission position on the traveling route (S150: NO), it is determined whether the information transmission position is within a predetermined distance (Lkm) from the position of the host vehicle (S240). It is considered that the predetermined distance Lkm is suitably about several km to 10 km.

If the information transmission position is within Lkm from the position of the vehicle (S240: YES), the received position information and reception time are stored in the memory 6 (S17).
0). If the information transmission position is more than Lkm from the position of the vehicle (S240: NO) or if there is no received data (S140: NO), the process proceeds to S180.

If it is determined in step S180 that there is no position information in the memory 6, display is performed in accordance with the display data created in step S110 (S230). On the other hand, even if there is position information in the memory 6, if the time T has elapsed after the last reception (S 190: NO), the position information and the reception time are cleared (S 250), and the process proceeds to S 230. .

The execution of the processing of S120 and S130 functions as transmission control means, and S150 to S170 and S130
The execution of the process at 240 serves as the determination means. Also, S2
Execution of the processing of 00 to S230 functions as a display control unit.

As described above, according to the travel guide device of the present embodiment, when an emergency condition such as a collision occurs, the traffic information of the collision and the position information of the vehicle at the time of detecting the information are transmitted. On the other hand, when receiving the traffic and position information as described above from another vehicle, based on the position information of the other vehicle and the position information of the own vehicle, if the distance between the two vehicles is within a predetermined distance, or When another vehicle is located on the traveling route, the traffic and position information received from the other vehicle are displayed.

Therefore, when a collision accident or the like occurs on the other side during traveling, it is possible to inform the driver by displaying the accident information and the occurrence position on a display of a following vehicle traveling in the lane. it can. Therefore, the following vehicle can avoid a rear-end collision.

Further, even if the vehicle travels at a distant place where there is no danger such as a rear-end collision, if there is an accident location on the traveling route of the own vehicle, there is a possibility that the vehicle will be jammed due to the accident. . However, by displaying the accident information and the occurrence position, if there is a side road, it is possible to bypass the accident point and avoid traffic jam by passing through the side road. Further, in the travel guide device of the present embodiment, a new route that reaches the destination by bypassing the route can be displayed.

Since no accident information or the like irrelevant to future driving is displayed, the driver must
There is no need to determine the need for information about the vehicle. Therefore, the reliability of the displayed information is increased, and the driver can quickly respond to the information.

As described above, it is possible to achieve smooth traffic control such as avoiding a rear-end collision of a succeeding vehicle at the time of occurrence of an accident and avoiding congestion by promoting detour.

As described above, the present invention is not limited to such embodiments at all, and can be implemented in various modes without departing from the gist of the present invention. In the above-described embodiment, a collision accident or the like is detected by the collision sensor 41 or the like, and an emergency stop is urged to prevent a rear-end collision or change the route. Alternatively, for example, a transit time between two predetermined measurement points may be calculated, and when the value exceeds a certain value, the traffic may be automatically determined to be a traffic jam and the information may be transmitted.

In this case as well, if the received vehicle is on the traveling route of the own vehicle or within a predetermined distance, the driver is prompted to change the route by displaying the fact. Therefore, it is possible to prevent a further increase in traffic congestion and achieve smooth traffic control.

Further, a voice output device may be added to transmit information by voice in addition to display. In particular, when an accident occurs at a short distance where a rear-end collision may occur, it is necessary to perform an avoidance driving operation such as an emergency stop as soon as possible, so that information transmission by voice is effective.

In the above-described embodiment, the on-vehicle transceiver 8 directly communicates with the communication satellite CS. However, a relay station may be provided on the ground to indirectly communicate with the communication satellite CS.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram showing the overall configuration of a travel guide device according to one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing transmission of information between two vehicles.

FIG. 3 is a flowchart illustrating a first half of a traffic information transmission / reception control process according to the embodiment;

FIG. 4 is a flowchart illustrating the latter half of the traffic information transmission / reception control process according to the embodiment.

FIG. 5 is a flowchart illustrating a route calculation routine according to the present embodiment.

6A is an explanatory diagram of an accident occurrence mark M1 shown on a display, and FIG. 6B is an explanatory diagram of an accident position mark M2 shown on a display.

7A is an explanatory diagram of a display example based on display data before collision data reception, FIG. 7B is an explanatory diagram of a display example in a case where an information transmission position is out of a display area, and FIG. FIG. 9 is an explanatory diagram illustrating a display example in a display area.

[Explanation of symbols]

M1: accident occurrence mark, M2: accident position mark, 1: position detector, 2 ... map data input device, 4 ... emergency detector, 5
... CPU, 6 ... Memory, 7 ... Display, 8 ... Transceiver, 9
... Transceiver antenna, 41 ... Collision sensor, 43 ... Emergency switch

Claims (3)

[Claims] 1. A route calculation means for calculating a travel route to a set destination, a navigation means for performing travel guidance according to the travel route calculated by the route calculation means, and a reception for receiving traffic information from outside. Means, if the traffic information received by the receiving means is determined to be information related to the traveling route calculated by the route calculating means, at least a new route detouring the route related to the traffic information. Means for causing the route calculating means to calculate a running route, and causing the navigation means to perform running guidance according to the calculated new route. 2. The travel guidance device according to claim 1, wherein the traffic information is one of accident information, traffic congestion information, and road surface information. 3. The travel guide device according to claim 1, further comprising an informing means for displaying or informing by voice a content related to external traffic information received by said receiving means.