JP2009168458A - Navigation device, and program for navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device capable of urging a driver to take a proper action, when a vehicle meets a traffic accident. <P>SOLUTION: Based on a fact that own vehicle meets a traffic accident (step 115), when own vehicle can move (step 125), this navigation device shows a route to a safe place (step 135). When own vehicle cannot move (step 125), the navigation device issues an instruction to the driver to arouse attention to the periphery of own vehicle (step 130). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a navigation device and a program for the navigation device.

Conventionally, a technique for detecting that a vehicle has encountered a traffic accident is known (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2006-199088

  When a traffic accident occurs in a place with a lot of traffic, it is necessary to move the accident vehicle to a safe place nearby. However, in many cases, the driver cannot calmly act after the accident, and the accident vehicle may have a secondary adverse effect on the surroundings. For example, a driver may panic due to an accident and escape from the vehicle with a vehicle. In addition, the driver may continue to travel without noticing the accident.

  An object of the present invention is to provide a navigation device that can prompt a driver to take an appropriate action when a vehicle encounters a traffic accident.

  In order to achieve the above object, the navigation device mounted on the vehicle detects that the host vehicle has encountered a traffic accident, and based on the detection, the vehicle is moved to a safe place. Is to guide. In this way, when the vehicle encounters a traffic accident, the driver can be encouraged to take appropriate actions by guiding the vehicle to a safe place.

  In addition, as described in claim 2, the navigation device performs the guidance when the host vehicle can move to a safe place based on the fact that the host vehicle has encountered a traffic accident. If the vehicle is not movable to a safe place, the driver may be instructed to call attention around the vehicle.

  In this way, even when the vehicle cannot be moved to a safe place, it is possible to instruct the driver to take appropriate actions, and to further calm the driver with this appropriate instruction. Can do.

  Further, as described in claim 3, the navigation device may warn the driver based on the fact that the vehicle has departed the route to the safe place. By doing so, it is possible to suppress inappropriate driving of the driver, such as the driver leaving the accident site without a valid reason after the accident.

  According to a fourth aspect of the present invention, the navigation device may disable the traveling of the host vehicle based on the fact that the host vehicle has deviated from the route to the safe place. In this way, it is possible to forcibly prohibit the driver's inappropriate driving such as the driver leaving the accident site after the accident.

  Further, as described in claim 5, the features of the navigation device of the present invention can also be understood as a program used in the navigation device.

  In addition, the code | symbol in the bracket | parenthesis in the said and the claim shows the correspondence of the term described in the claim, and the concrete thing etc. which illustrate the said term described in embodiment mentioned later. .

  Hereinafter, an embodiment of the present invention will be described. FIG. 1 shows a hardware configuration of a vehicle navigation apparatus 1 according to this embodiment. The vehicle navigation device 1 includes a traffic information receiver 10, a position detector 11, an image display device 12, an operation unit 13, a speaker 14, an impact detection sensor 15, an in-vehicle camera 16, a vehicle control device 17, and a map data acquisition unit 18. And a control circuit 19.

  The traffic information receiver 10 is a radio receiver that receives road congestion information, traffic regulation information, and the like wirelessly transmitted from an FM radio broadcasting station or a roadside device installed along the road and outputs the information to the control circuit 19.

  The position detector 11 includes a well-known sensor (not shown) such as a geomagnetic sensor, a gyroscope, a vehicle speed sensor, and a GPS receiver. The current position and direction of the vehicle based on the characteristics of each of these sensors. , And information for specifying the speed is output to the control circuit 19.

  The image display device 12 displays a video based on the video signal output from the control circuit 19 to the user. The operation unit 13 directly accepts a user operation and outputs a signal corresponding to the accepted operation to the control circuit 19.

  The impact detection sensor 15 detects an impact generated in the host vehicle, and outputs a signal corresponding to the strength of the impact to the control circuit 19. As the impact detection sensor 15, for example, a device that detects vibration, sound, and acceleration generated in the vehicle body by impact, such as a vibration sensor, a volume sensor, and an acceleration sensor, can be used.

  The in-vehicle camera 16 is attached to one or more positions (for example, the front end, the side, and the rear end) of the host vehicle, and repeats the surroundings (for example, front, side, rear) of the host vehicle (for example, 0. Images are taken at intervals of 1 second, and an image as a result of the shooting is output to the control circuit 19.

  The vehicle control device 17 is a device that disables traveling of the host vehicle in accordance with a command from the control circuit 19. As the vehicle control device 17, for example, a device that locks a steering, an accelerator, a brake, or the like of the host vehicle to disable the operation, or a device that prohibits the operation of the engine can be used.

  The map data acquisition unit 18 includes a writable nonvolatile storage medium such as an HDD and a device that reads and writes data from and to the storage medium. The storage medium stores a program executed by the control circuit 19, map data for route guidance, and the like.

  The map data has road data and facility data. The road data includes link position information, link type information, link width information, node position information, node type information, information on connection relations between nodes and links, and the like. The facility data includes data indicating name information for each facility, location information, facility type information, and the like.

  A control circuit (corresponding to a computer) 19 is a microcomputer having a CPU, a RAM, a ROM, an I / O, and the like. The CPU executes a program for the operation of the vehicle navigation device 1 read from the ROM or the map data acquisition unit 18, reads information from the RAM, the ROM, and the map data acquisition unit 18 at the time of execution. Information is written to the storage medium of the map data acquisition unit 18, the traffic information receiver 10, the position detector 11, the image display device 12, the operation unit 13, the speaker 14, the impact detection sensor 15, the in-vehicle camera 16, In addition, it exchanges signals with the vehicle control device 17.

  Specific processing performed by the control circuit 19 executing the program includes current position specifying processing, guidance route calculation processing, normal route guidance processing, captured image recording processing, accident response guidance processing, and the like.

  The current position specifying process is a process for specifying the current position and direction of the vehicle based on a signal from the position detector 11 using a known technique such as map matching. The guidance route calculation process is a process of receiving an input of a destination by the user from the operation unit 13 and calculating an optimum guidance route from the current position to the destination.

  In the normal route guidance process, the map data is read from the map data acquisition unit 18, and an image obtained by superimposing the guide route, the destination, the waypoint, and the current position calculated by the guide route calculation process on the map indicated by the map data is displayed. This is a process of outputting to the image display device 12 and outputting to the speaker 14 a guidance voice instructing a right turn, a left turn, etc., when necessary such as when the host vehicle arrives before the guidance intersection.

  The captured image recording process is a process of recording the image received from the in-vehicle camera 16 in the storage medium of the map data acquisition unit 18 in time series.

  The accident response guidance process is a process for guiding the host vehicle to a safe position when the host vehicle encounters an accident. The control circuit 19 executes the program 100 shown in FIG. 2 in parallel with other processes in order to realize this accident response guidance process.

  In the execution of the program 100, the control circuit 19 first waits until the own vehicle collides in Step 105, and then executes Step 110 if the collision occurs. Specifically, it is determined that there is a collision if the intensity of the collision specified according to the signal from the impact detection sensor 15 is equal to or higher than the first reference value, and it is determined that there is no collision if it is less than the first reference value. .

  In step 110, it is determined whether or not the collision corresponds to an accident. If it is determined that the collision corresponds to an accident, then step 120 is executed. If it is determined that the collision does not correspond to an accident, step 105 is executed again.

  As a specific example of this determination, for example, if the intensity of the collision specified according to the signal from the impact detection sensor 15 is equal to or higher than the second reference value (greater than the first reference value), it is determined that an accident has occurred. It may be. Alternatively, it is determined that there is an accident when analyzing the captured images of the period before and after the impact acquired from the in-vehicle camera 16 and detecting that another vehicle, a road installation, a person, or the like has collided with the own vehicle. It may be like this. Moreover, you may determine the presence or absence of an accident using both the signal from the impact detection sensor 15 and the picked-up image from the vehicle-mounted camera 16.

  In step 120, information on the situation around the current location is acquired based on the captured image from the in-vehicle camera 16, the map data in the map data acquisition unit 18, and the information from the traffic information receiver 10.

  Specifically, for example, the traffic volume at the current position is estimated based on the number of vehicles in the captured image, information from the traffic information receiver 10, and the like. In addition, for example, information on whether the current position is a road or other place (for example, a parking lot) is acquired from map data. Further, if the current position is a road, the width information of the road at the current position is obtained. get.

  Subsequently, in step 125, it is determined whether or not the vehicle is to be moved to a safe place based on the information acquired in step 120. If it is determined that the vehicle is not to be moved, then step 130 is executed and it is determined that the vehicle is to be moved. If so, step 135 is executed.

  Whether or not to move the host vehicle to a safe place is determined to move when the host vehicle is movable and the host vehicle needs to be moved. If it is not necessary to move the host vehicle, it is determined not to move.

  When the host vehicle is movable, it means that the host vehicle is able to travel without being damaged, and when the host vehicle is not movable, it means that the host vehicle is faulty and cannot be driven. Say. Whether or not the host vehicle is out of order is determined based on the acquired information, for example, by acquiring failure information on the engine, brake, etc. from an engine ECU, brake ECU, etc. (not shown) via an in-vehicle LAN (not shown). To do.

  Further, the fact that it is not necessary to move the host vehicle means that the current position of the host vehicle is already a safe place. The fact that it is not necessary to move the host vehicle means that the current position of the host vehicle is not a safe place. A safe place is a place where there is no significant adverse effect on the traffic of other vehicles even if the vehicle is there. For example, a parking lot or a shoulder of a road whose traffic volume is smaller than a standard amount and whose width is larger than a standard length corresponds to a safe place.

  In step 130, the driver is instructed to call attention to people around the vehicle. For example, the speaker 14 or the image display device 12 is controlled to output a sound “Please call attention to the surroundings” or display an image. After step 130, the execution of the program 100 is terminated.

  In step 135, based on the map data and the information from the traffic information receiver 10, the nearest safe place (hereinafter referred to as the nearest safe place) from the current position is specified, and the optimum route to the nearest safe place (hereinafter referred to as the nearest safe place). , Referred to as a save route) is determined by the route search process described above. In step 135, the route is displayed on the image display device 12 together with the map, and guidance for the route is started. This guidance is performed in the same way as the normal route guidance process. At the start, a message for guiding to a safe evacuation place may be notified by voice or text using the speaker 14 or the image display device 12.

  Subsequently, in step 140, it is determined whether or not the driver is following the guidance based on whether or not the host vehicle is traveling along the retreat route. When driving according to the guidance, step 145 is subsequently executed. When the driving according to the guidance is not performed and the escape route is deviated, step 155 is subsequently executed.

  In step 145, it is determined whether or not the host vehicle has arrived at the nearest safe area. If the vehicle has arrived, step 150 is executed. If not, step 140 is executed again.

  In step 150, after arriving at the nearest safe place, it is determined whether or not the vehicle has moved from a safe place within a predetermined time (for example, 5 minutes). If the host vehicle does not move even after the predetermined time has elapsed, the execution of the program 100 is terminated.

  In step 155, a warning is given by voice or text using the speaker 14 or the image display device 12 that the user is away from the route to the nearest safe place, and at the current position, a new nearest safe place and the nearest safe place are displayed. The evacuation route is searched, display of the evacuation route and route guidance are started.

  Subsequently, at step 160, the value of the number of re-searches is increased by one time. The number of re-searches is a variable that is reset to zero when the execution of the program 100 is started. Therefore, the number of times that the re-search / guidance in step 155 has been executed is reflected in the value of the number of re-searches.

  Subsequently, in step 165, it is determined whether or not the value of the number of re-searches is within a set number (two times or more, for example, three times). If the set number of times is exceeded, step 170 is subsequently executed. Note that the number of times of setting may be set in advance by the driver using the operation unit 13.

  In step 170, the vehicle control device 17 is controlled to disable traveling of the host vehicle. At this time, the control circuit 19 informs the driver in advance that “the vehicle should be brought close to the road shoulder because the travel of the host vehicle is disabled,” and the vehicle control device 17 gradually travels the host vehicle after the notification. You may control the engine and brake of the own vehicle so that speed may fall.

  As described above, when the vehicle encounters a collision accident (see steps 105 and 110), the control circuit 19 determines whether or not to move to a safe place based on the situation around the current location (see step 120). If the determination is made (see step 125) and movement is performed, the safe place and the route to the place are searched, and the route is guided (see step 135). Thus, when the host vehicle encounters a traffic accident, the driver can be encouraged to take appropriate actions by guiding the driver to a safe place.

  If the control circuit 19 determines not to move to a safe place (see step 125), the control circuit 19 instructs the driver to call attention to the surroundings of the host vehicle (see step 130).

  In this way, the vehicle navigation apparatus 1 can instruct the driver to take an appropriate action even when the host vehicle cannot be moved to a safe place or when there is no need for movement. In addition, the driver can be calmed down by an appropriate instruction. Then, the driver can alert the surroundings according to this instruction.

  Further, the control circuit 19 warns the driver based on the fact that the vehicle has departed the route to the safe place (see step 140), re-searches the route to the safe place, and guides the route. (See step 155). By doing in this way, the navigation apparatus 1 for vehicles can suppress the driver | operator's improper driving | operation, such as a driver leaving from the accident site without a valid reason after an accident. And the own vehicle can always be guided to an appropriate safe place.

  Further, when the number of times the host vehicle has deviated from the route to a safe place exceeds the set number of times (see step 160), the control circuit 19 disables the traveling of the host vehicle. By doing in this way, the vehicle navigation apparatus 1 can forcibly prohibit the driver from ignoring the guidance and leaving the accident site after the accident.

  In addition, after the host vehicle arrives at a safe place where the host vehicle is guided (see step 150) and the host vehicle further moves (see step 150), the control circuit 19 searches and guides the safe place again (see step 150). (See step 135). Even if the vehicle is inevitably moved from a safe place for some reason, the vehicle can be guided to a new safe place.

(Other embodiments)
As mentioned above, although embodiment of this invention was described, the scope of the present invention is not limited only to the said embodiment, The various form which can implement | achieve the function of each invention specific matter of this invention is included. It is. For example, the number of times set in step 165 may be one.

  In addition, the vehicle navigation device 1 provides guidance to a safe place even if the vehicle is movable and needs to move when there is no safe place within a reference distance (for example, 500 meters) from the current position. May not be performed. In this way, it is possible to prevent the vehicle from being too far away from the accident site.

  In the above embodiment, each function realized by the program executed by the control circuit 19 is realized using hardware having these functions (for example, an FPGA capable of programming a circuit configuration). You may come to do.

  Further, data that needs to be sequentially recorded, such as captured images, is not limited to the storage medium of the map data acquisition unit 18, and continues to hold data even when the main power supply of the vehicle navigation device 1 is stopped. It may be stored in a storage medium (for example, flash memory, EEPROM, backup RAM, HDD). In that case, the storage medium of the map data acquisition unit 18 need not be a writable storage medium such as an HDD, and may be a non-writable storage medium such as a DVD or a CD-ROM.

1 is a block diagram of a vehicle navigation apparatus 1 according to an embodiment of the present invention. 3 is a flowchart of a program 100 executed by a control circuit 19;

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle navigation apparatus 10 Traffic information receiver 15 Impact detection sensor 16 Car-mounted camera 17 Vehicle control apparatus

Claims (5)

A navigation device mounted on a vehicle,
Accident detection means (110) for detecting that the vehicle has encountered a traffic accident;
A navigation device comprising guidance means (135, 155) for guiding the vehicle to a safe place based on detection by the accident detection means (110). Based on the detection of the accident detection means (110), when the vehicle is not movable to a safe place, comprising an instruction means (130) for instructing the driver to call attention to the surroundings of the vehicle,
The navigation device according to claim 1, wherein the guide means (135, 155) performs the guidance when the vehicle is movable to a safe place.   The navigation device according to claim 1 or 2, wherein the guide means warns the driver based on the fact that the vehicle has deviated from the route to the safe place.   4. A travel disabling means (170) for disabling the travel of the vehicle based on the fact that the vehicle has deviated from the route to the safe place. The navigation device described in one. A program used for a navigation device (1) mounted on a vehicle,
Accident detection means (110) for detecting that the vehicle has encountered a traffic accident, and guidance means (135, 155) for guiding the vehicle to a safe place based on the detection of the accident detection means (110) , A program that causes a computer to function.

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