JP4973380B2 - Traffic safety system - Google Patents

Description

  The present invention relates to a traffic safety system that performs communication between a portable communication device possessed by a pedestrian or the like and an in-vehicle communication device mounted on a vehicle.

As a conventional traffic safety system, for example, as described in Patent Document 1, data is transmitted and received between a pedestrian portable terminal device (mobile communication device) and an in-vehicle communication device mounted on a vehicle. By determining the distance and positional relationship between the vehicle and the terminal device, discovering a pedestrian who has a high probability of colliding with the vehicle, and notifying the in-vehicle communication device and / or the terminal device, there is a danger. What can be informed is known.
JP 7-306995 A

  However, the prior art performs one-to-one communication between the in-vehicle communication device and the terminal device, and detects the risk level. Therefore, when many pedestrians have terminal devices, communication congestion occurs. As means for solving such communication congestion, one terminal device is selected as a master terminal device, another terminal device is set as a slave terminal device, and communication between the in-vehicle communication device and the slave terminal device is performed as the master terminal device. There is a so-called master / slave system that mediates. In such a master / slave system, a terminal device possessed by a pedestrian who has a high possibility of colliding with a vehicle should directly communicate with the in-vehicle communication device. Select as device. Since the master terminal device selected in this way is likely to remain in a high risk state even after being selected, the master terminal device frequently communicates with the in-vehicle communication device and the slave terminal device. It becomes. For this reason, when the battery of the master terminal device becomes intensive and the remaining battery level of the master terminal device is exhausted, a situation occurs in which communication between the terminal device including the slave terminal device and the in-vehicle communication device becomes impossible.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide traffic safety that can prevent communication failure when one master portable communication device continues communication when communication is performed between an in-vehicle communication device and a portable communication device in a master / slave manner. To provide a system.

  The present invention includes an in-vehicle communication device mounted on a vehicle and a plurality of portable communication devices that can communicate with the in-vehicle communication device, and sets the plurality of portable communication devices to either a master portable communication device or a slave portable communication device. And a traffic safety system for performing communication between the master portable communication device and the in-vehicle communication device, and communicating between the master portable communication device and the slave portable communication device, wherein the remaining battery level of each portable communication device And a selection means for selecting a master portable communication device from a plurality of portable communication devices based on the remaining battery level of each portable communication device.

  In the traffic safety system according to the present invention, when the master portable communication device is selected by selecting the master portable communication device based on the remaining battery amount of each portable communication device, the remaining battery amount is high. Can be re-selected as a new master portable communication device. Thereby, it is prevented that the battery remaining in the master portable communication device is reduced and communication becomes impossible.

  Preferably, the information processing apparatus further includes a determination unit that determines a risk level of the owner of each portable communication device, and the selection unit is based on the remaining battery level of each portable communication device and the risk level of the owner of each portable communication device. A master portable communication device is selected.

  In the traffic safety system according to the present invention, for example, when the battery level of a portable communication device held by a person with a high degree of danger to the vehicle is large, the portable communication device is selected as a master portable communication device, and Even if it is a portable communication device held by a person with a high degree of danger, if the remaining battery level of the portable communication device is low, another portable communication device with a large remaining battery level is selected as the master portable communication device. Is possible.

  Preferably, the selection unit selects the portable communication device as the master portable communication device when the remaining battery level of the portable communication device determined to be the highest risk of the owner is greater than a predetermined value. Features.

  In the traffic safety system according to the present invention, a portable communication device held by a person whose battery remaining amount is greater than a predetermined value and determined to have the highest risk to the vehicle is selected as a master portable communication device, Since communication is performed directly, a plurality of portable communication devices can be effectively used for a long time.

  Further preferably, the determining means determines the risk of the owner of each portable communication device based on the distance to the vehicle and the distance to the roadway.

  In the traffic safety system according to the present invention, for example, when the owner of each portable communication device is walking on a sidewalk or riding a bicycle on the sidewalk, the risk level of each owner is easily and reliably determined. be able to.

  According to the present invention, there is provided a traffic safety system capable of preventing communication failure when one master portable communication device continues to communicate when performing communication between an in-vehicle communication device and a portable communication device in a master / slave manner. It becomes possible to provide. As a result, it is possible to sufficiently improve the safety of the owner of the mobile communication device.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a traffic safety system according to the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

  FIG. 1 is a schematic configuration diagram showing an embodiment of a traffic safety system according to the present invention. As shown in FIG. 1, the traffic safety system 1 according to the present embodiment includes a mobile communication device 10 held by a pedestrian or the like and an in-vehicle communication device 20 mounted on the vehicle 2. The mobile communication device 10 and the in-vehicle communication device 20 can perform wireless communication with each other. By transmitting and receiving data related to behavior information such as position information and speed information between the mobile communication device 10 and the in-vehicle communication device 20, the distance and the positional relationship between the vehicle 2 and the pedestrian and the like can be determined. The degree of danger indicating the possibility of collision with the vehicle 2 is calculated, and the danger can be notified by notifying both or one of the mobile communication device 10 and the in-vehicle communication device 20 to that effect. As the mobile communication device 10, it is generally considered that a mobile phone is used. However, a PDA (Personal Digital Assistant) terminal or a dedicated terminal device may be used.

  When the vehicle 2 starts, the in-vehicle communication device 20 transmits communication data intermittently or continuously using radio waves of a predetermined frequency. The communication data transmitted here includes ID information for uniquely identifying the vehicle 2. When the mobile communication device 10 enters the reachable range of the radio wave transmitted from the in-vehicle communication device 20, the mobile communication device 10 can receive the radio wave transmitted from the in-vehicle communication device 20. The portable communication device 10 transmits communication data including ID information uniquely identifying itself to the in-vehicle communication device 20 by radio waves in order to inform the in-vehicle communication device 20 of the presence of the mobile communication device 10. The in-vehicle communication device 20 can recognize the presence of the mobile communication device 10 together with the ID information when receiving the radio wave transmitted from the mobile communication device 10.

  Next, grouping of the mobile communication devices 10 will be described. For this grouping, various known methods can be used, and an example will be described. The mobile communication device 10 transmits / receives its own position information to / from other mobile communication devices 10 existing in a communicable range. Then, the mobile communication devices 10 existing in the vicinity can be grouped based on the received position information. As another example, the mobile communication device 10 can calculate its own risk level, and a plurality of mobile communication devices 10 whose calculated risk values are within a predetermined range can be grouped. Furthermore, as another example, the in-vehicle communication device 20 receives the position information and the risk level of the mobile communication device 10, and the in-vehicle communication device 20 has a plurality of mobile communication devices 10 present in the vicinity based on the received information. They can be grouped together, or the mobile communication devices 10 whose risk values fall within a predetermined range can be grouped. And the vehicle-mounted communication apparatus 20 can make the portable communication apparatus 10 recognize the group to which self belongs by transmitting the information etc. which identify a group to the portable communication apparatus 10.

  When the mobile communication devices 10 are grouped as described above, the mobile communication devices 10 belonging to the same group communicate with each other, and one mobile communication device 10 is assigned the ID of another mobile communication device 10 belonging to the same group. Can recognize information.

  FIG. 2 is a block diagram illustrating the configuration of the mobile communication device 10. As illustrated in FIG. 2, the mobile communication device 10 includes various sensors 11, a terminal behavior acquisition unit 12, a transmission / reception unit 13, a vehicle behavior acquisition unit 14, another terminal information acquisition unit 15, and a risk determination unit 16. A battery remaining amount detection unit 17, a communication method setting unit 18, and a notification unit 19.

  Various sensors 11 are for detecting the behavior of the mobile communication device 10. As the various sensors 11, for example, an orientation sensor, an acceleration sensor, a GPS device, a geomagnetic sensor, and the like are mounted as necessary.

  The terminal behavior acquisition unit 12 acquires position information, speed information, acceleration information, and the like as behavior information of its own mobile communication device 10 from detection values of various sensors 11. The acquired behavior information is used by the risk determination unit 16 to calculate the risk, and is transmitted to the in-vehicle communication device 20 by the transmission / reception unit 13.

  The transmission / reception unit 13 transmits / receives information to / from the other mobile communication device 10 and the in-vehicle communication device 20. Further, the transmission / reception unit 13 extracts ID information that uniquely identifies the mobile communication device 10 or the in-vehicle communication device 20 that is the transmission source of the information from the received information. Furthermore, the transmission / reception unit 13 can include ID information for identifying itself in the information to be transmitted during transmission.

  The vehicle behavior acquisition unit 14 acquires behavior information of the vehicle 2 on which the in-vehicle communication device 20 is mounted based on the communication data from the in-vehicle communication device 20 received by the transmission / reception unit 13. The behavior information of the vehicle 2 includes position information, speed information, acceleration information, and the like.

  The other terminal information acquisition unit 15 acquires and stores ID information of other mobile communication devices 10 and in-vehicle communication devices 20 that perform communication via the transmission / reception unit 13. The other terminal information acquisition unit 15 also acquires and stores information on the risk level and remaining battery level of the mobile communication devices 10 belonging to the same group via the transmission / reception unit 13.

  Based on the behavior information of the mobile communication device 10 acquired by the terminal behavior acquisition unit 12 and the behavior information of the vehicle 2 acquired by the vehicle behavior acquisition unit 14, the risk determination unit 16 The degree of risk that is a value indicating the possibility that the pedestrian carrying the vehicle collides with the vehicle 2 on which the in-vehicle communication device 20 is mounted is calculated.

  Specifically, as shown in FIG. 3, the risk determination unit 16 determines the distance L1 between the pedestrian holding the mobile communication device 10 and the vehicle 2 and the distance between the pedestrian holding the mobile communication device 10 and the roadway. Based on L2, the pedestrian's risk can be calculated. At this time, the smaller the distance L1 from the vehicle 2 or the distance L2 from the roadway, the greater the pedestrian risk level. Further, the pedestrian risk level can be calculated using other known methods. An example of the calculation method will be described below. First, the travel trajectory of the pedestrian and the travel trajectory of the vehicle 2 are obtained. And where there is a place where both trajectories intersect or there is a place approaching the vicinity of a certain distance or less, and the difference in time when both pass through those places is within a certain value, a place where a collision is expected The required time to reach can be taken as the danger level.

  The battery remaining amount detection unit 17 acquires the remaining amount of battery power (battery remaining amount) included in the mobile communication device 10.

  The communication method setting unit 18 sets the communication method of the mobile communication device 10 as a master method based on the pedestrian risk calculated by the risk determination unit 16 and the remaining battery level acquired by the remaining battery level detection unit 17. Or the slave method, and this setting information is sent to the transmission / reception unit 13. Here, there is one portable communication device (master portable communication device) whose communication method is the master method, and the other portable communication devices are slave portable communication devices whose communication method is the slave method. The in-vehicle communication device 20 communicates only with the master portable communication device. Details of the setting of the communication method will be described later.

  The notification unit 19 notifies the owner of the mobile communication device 10, that is, the pedestrian, of the possibility of a collision with the vehicle 2 based on the risk level calculated by the risk level determination unit 16. For example, the notification unit 19 may notify by making a sound, may be notified by visual means, or may be notified by vibrating the mobile communication device 10.

  FIG. 4 is a block diagram showing the configuration of the in-vehicle communication device 20. As shown in FIG. 4, the in-vehicle communication device 20 includes various sensors 21, a vehicle behavior detection unit 22, a transmission / reception unit 23, a terminal information acquisition unit 24, a terminal risk management unit 25, and a notification unit 26. I have.

  Various sensors 21 are for detecting the behavior of the vehicle 2. As the various sensors 21, for example, an orientation sensor, an acceleration sensor, a GPS device, a geomagnetic sensor, and the like are mounted as necessary.

  The vehicle behavior acquisition unit 22 acquires position information, speed information, acceleration information, and the like as behavior information of the vehicle 2 from detection values of the various sensors 21. The acquired behavior information is used by the terminal risk management unit 25 to determine the risk indicating the possibility of collision with the holder of each mobile communication device 10, and is transmitted to the mobile communication device 10 by the transmission / reception unit 23. Is done.

  The transmission / reception unit 23 transmits / receives information to / from the mobile communication device 10. Further, the transmission / reception unit 23 extracts ID information that uniquely identifies the mobile communication device 10 that is the transmission source of the information from the received information. Furthermore, the transmission / reception unit 23 can include ID information for identifying itself in information to be transmitted at the time of transmission.

  The terminal information acquisition unit 24 acquires the risk level and behavior information of the mobile communication device 10 received by the transmission / reception unit 23. The behavior information of the mobile communication device 10 includes position information, speed information, acceleration information, and the like.

  The terminal risk management unit 25 manages information such as the risk level of each mobile communication device 10 acquired by the terminal information acquisition unit 24. Further, the terminal risk management unit 25 determines whether to notify the driver of the vehicle 2 that there is a possibility of a collision with the owner of the mobile communication device 10 based on the managed information. To do.

  The notification unit 26 notifies the driver of the vehicle 2 of the possibility of a collision with the owner of the mobile communication device 10 based on the determination of the terminal risk management unit 25. For example, the notification unit 26 may notify by emitting a sound, or may notify by visual means.

  FIG. 5 is a flowchart showing a processing procedure executed by the communication method setting unit 18 of the mobile communication device 10.

  First, in step S51, the risk level of a pedestrian who owns his mobile communication device 10 calculated by the risk level determination unit 16 is acquired.

  In step S52, the remaining battery level of the portable communication device 10 detected by the remaining battery level detection unit 17 is acquired.

  In step S53, the risk level and remaining battery level of other mobile communication devices 10 in the same group are acquired. The risk level and the remaining battery level of the mobile communication devices 10 belonging to the same group are stored in the other terminal information acquisition unit 15 together with the ID information. Thereby, it is possible to acquire the risk level and remaining battery level of other mobile communication devices 10 in the group.

  In step S54, first, the mobile communication device 10 having the highest risk level of the owner is extracted from the mobile communication devices 10 belonging to the same group including itself. Then, it is determined whether or not the remaining battery level of the mobile communication device 10 having the highest risk level of the owner is equal to or less than a predetermined value. If the remaining battery level is not more than the predetermined value, the process proceeds to step S55, and if not, the process proceeds to step S57.

  It is preferable to select the mobile communication device 10 having a high risk level of the owner as a master mobile communication device that directly communicates with the in-vehicle communication device 20. However, when the remaining battery level of the master portable communication device is equal to or less than a predetermined value, the master portable communication device cannot communicate with the in-vehicle communication device 20 due to insufficient battery power. Communication between the device and the slave portable communication device cannot be performed. For this reason, when selecting the master portable communication device, not only the risk level of the owner but also the remaining battery level is taken into account.

  In step S55, the power-consideration risk level of a pedestrian who owns each mobile communication device 10 is calculated. The power-considered risk level is an index value that is calculated to select the master mobile communication device in consideration of the remaining battery level, instead of selecting the master mobile communication device only based on the risk level. Various calculation methods can be adopted for the power-considered risk level depending on the system. For example, the sum of the risk level and the remaining battery level can be used as the power source consideration risk level. Further, if importance is attached to the safety of the owner of the mobile communication device 10, a sum value obtained by adding the remaining amount of the battery to a value obtained by squaring the risk level can be set as the power-source risk level.

  Subsequently, in step S56, the mobile communication device 10 having the maximum power-consideration risk calculated in step S55 is selected as the master mobile communication device. Thereafter, the process returns to step S51, and the above procedure is repeatedly executed.

  On the other hand, in step S57, the mobile communication device 10 having the maximum risk is selected as the master mobile communication device. This is because there is no fear that the remaining battery level is insufficient due to the determination made in step S54. Thereafter, the process returns to step S51, and the above procedure is repeatedly executed.

  In the processing procedure shown in FIG. 5, first, the risk of the owner of the mobile communication device 10 is evaluated to determine a master mobile communication device candidate, and then the remaining battery level of the master mobile communication device candidate is evaluated. When the remaining battery level is low, the power-considered risk level is calculated and the master portable communication device is selected. However, the present invention is not limited to this procedure. For example, in step S53, after acquiring the risk level of the pedestrian holding the other mobile communication device 10 and the remaining battery level of the other mobile communication device 10, the stepwise evaluation as in step S54 is not performed, and the power is immediately supplied. The consideration risk level may be calculated, and the portable communication device 10 having the maximum power consideration risk level may be selected as the master portable communication device. In any processing procedure, an appropriate portable communication device 10 is selected as the master portable communication device at that time.

  In the above, the remaining battery level detection unit 17 of the mobile communication device 10 constitutes a detection unit that detects the remaining battery level of each mobile communication device. The transmission / reception unit 13, the other terminal information acquisition unit 15, and the communication method setting unit 18 of the mobile communication device 10 select means for selecting a master mobile communication device from a plurality of mobile communication devices based on the remaining battery level of each mobile communication device. Configure.

  In addition, various sensors 11 of the mobile communication device 10, terminal behavior acquisition unit 12, transmission / reception unit 13, vehicle behavior acquisition unit 14, other terminal information acquisition unit 15 and risk level determination unit 16, various sensors 21 of the in-vehicle communication device 20, The vehicle behavior acquisition unit 22 and the transmission / reception unit 23 constitute a determination unit that determines the risk level of the owner of each portable communication device.

  As described above, in the present embodiment, the master portable communication device is determined in consideration of not only the risk of the owner of the portable communication device 10 but also the remaining battery level of the portable communication device 10. Even if the risk level of the owner of the mobile communication device 10 is high, if the remaining battery level of the mobile communication device 10 is low, the mobile communication device 10 with a large remaining battery level is selected again as the master mobile communication device. . Thereby, it is prevented that the battery of the battery of a master portable communication apparatus is lose | eliminated and communication with a master portable communication apparatus, a vehicle-mounted communication apparatus, and a slave portable communication apparatus becomes impossible. Accordingly, since the remaining battery levels of a plurality of mobile communication devices belonging to the same group are made uniform, it is possible to sufficiently improve the safety of the owner of each mobile communication device.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, a plurality of mobile communication devices 10 belonging to the same group acquire the risk level and remaining battery level of the owner of each mobile communication device 10 and select a master mobile communication device. The method is not particularly limited. For example, the in-vehicle communication device 20 acquires the behavior information and the remaining battery level of all the mobile communication devices 10 belonging to one group, and calculates the risk level of the owner of each mobile communication device 10 based on the acquired information. Furthermore, a master portable communication device may be selected. Further, the base station of the center acquires the behavior information of the in-vehicle communication device 20, the behavior information of the plurality of mobile communication devices 10, and the remaining battery level, and the risk of the owner of each mobile communication device 10 based on the acquired information The degree may be calculated and a master portable communication device may be selected.

It is a schematic structure figure showing one embodiment of a traffic safety system concerning the present invention. It is a block diagram of the portable communication apparatus shown in FIG. FIG. 3 is a diagram illustrating a positional relationship between a pedestrian, a vehicle, and a roadway when calculating a risk level by a risk level determination unit illustrated in FIG. 2. It is a block diagram of the vehicle-mounted communication apparatus shown in FIG. It is a flowchart which shows the process sequence which the communication system setting part shown in FIG. 2 performs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Traffic safety system, 2 ... Vehicle, 10 ... Portable communication apparatus, 11 ... Various sensors (determination means), 12 ... Terminal behavior acquisition part (determination means), 13 ... Transmission / reception part (selection means, determination means), 14 ... Vehicle behavior acquisition unit (determination unit), 15 ... other terminal information acquisition unit (selection unit, determination unit), 16 ... risk level determination unit (determination unit), 17 ... remaining battery level detection unit (detection unit), 18 ... communication System setting unit (selection unit), 20 ... vehicle-mounted communication device, 21 ... various sensors (determination unit), 22 ... vehicle behavior acquisition unit (determination unit), 23 ... transmission / reception unit (determination unit)

Claims (5)

An in-vehicle communication device mounted on the vehicle;
A plurality of portable communication devices capable of communicating with the in-vehicle communication device;
The plurality of portable communication devices are set as one of a master portable communication device and a slave portable communication device, and communication is performed between the master portable communication device and the in-vehicle communication device, and the master portable communication device and the slave A traffic safety system for communicating with a portable communication device,
Detecting means for detecting a remaining battery capacity of each portable communication device;
A determination means for determining a risk level of a holder of each portable communication device;
Selection means for selecting the master portable communication device from the plurality of portable communication devices based on the remaining battery level of each portable communication device and the risk level of the owner of each portable communication device. Road safety system. The traffic safety system according to claim 1, wherein the selection unit selects the master portable communication device based on a sum of a risk level and a remaining battery level. 2. The traffic safety system according to claim 1, wherein the selection unit selects the master portable communication device based on a sum value obtained by adding a remaining battery amount to a value obtained by squaring the degree of danger. The selection means selects the mobile communication device as the master mobile communication device when the remaining battery level of the mobile communication device determined to be the highest risk of the holder is greater than a predetermined value. The traffic safety system according to claim 1 . The said judgment means judges the risk of the holder of each said mobile communication apparatus based on the distance with the said vehicle, and the distance with a roadway, The any one of Claims 1-4 characterized by the above-mentioned. Road safety system.

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