JP2014142798A - Inter-vehicle communication portable device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inter-vehicle communication portable device which, even when a user carrying the device is on a vehicle, can notify another vehicle of presence information.SOLUTION: A portable device 100 comprises at least a control unit 101, a GPS antenna 103, a GPS reception circuit 110, an inter-vehicle communication antenna 106, an inter-vehicle communication circuit 107; and an acceleration sensor 111G, and executes communication with an on-vehicle device of a vehicle. The control unit determines whether a person carrying the portable device 100 is walking or is in a vehicle on the basis of detection data of the acceleration sensor, and transmits the determination result with position information by GPS to the on-vehicle device of the vehicle.

Description

  The present invention relates to a mobile device for inter-vehicle communication, and more particularly to a device that provides driving assistance.

In the current traffic environment, in order to support driving when turning right and left on a T-junction, a crossroad, etc., communication is carried out between the portable device of the pedestrian and the in-vehicle device on the vehicle side, and the occupant on the vehicle side A driving support system has been proposed to inform the existence of pedestrians.
In this type of driving support system, the mobile device on the pedestrian side wirelessly transmits presence information such as its own location information and speed to the surrounding vehicle side, and the vehicle side that has received the presence information In the in-vehicle device, a process of calculating and predicting the approach distance and notifying appropriately is executed.

At this time, for example, in Patent Document 1, when it is determined that the pedestrian has boarded another vehicle, it is proposed to stop communication with the portable device of the pedestrian and delete unnecessary information. .
In Patent Document 2, communication is performed when it is determined that the pedestrian's portable device is left without detecting an external force such as vibration, or when it is determined that the pedestrian's portable device is on the vehicle and moving at high speed. It has been proposed to stop.
Patent Document 3 also proposes that communication is stopped when a mobile device of a pedestrian gets on a vehicle based on information detected by an acceleration sensor and determines that transmission of pedestrian presence information is unnecessary.

JP 2005-9933 A JP 2004-219387A JP 2000-149198 A

However, in such a portable device on the pedestrian side, when it is determined that the vehicle has been boarded, transmission (notification) of the presence information of the pedestrian is stopped. When the on-vehicle device on the vehicle side to be exchanged is not installed, information cannot be acquired and processing for avoiding a collision between vehicles cannot be executed.
Therefore, an object of the present invention is to provide a portable device for inter-vehicle communication that can also notify the vehicle side of presence information at the time of boarding.

A first aspect of the invention relating to a mobile device for inter-vehicle communication that solves the above-described problem is a mobile device that includes at least a position detection function and a transmission function and performs communication with the vehicle side. A situation determination unit that determines whether the wearer is walking or riding, and a transmission control unit that causes the transmission function to transmit detection position information by the position detection function together with a situation determination result by the situation determination unit. It is characterized by having.
In a second aspect of the invention relating to a mobile device for inter-vehicle communication that solves the above-mentioned problem, in addition to the specific matter of the first aspect, the vehicle on which the carrier rides is either a two-wheel vehicle or a four-wheel vehicle. A vehicle type determination unit for determining whether or not there is provided, wherein the transmission control unit causes the transmission function to transmit the vehicle determination result by the vehicle type determination unit.

As described above, according to the first aspect of the present invention, it is possible to transmit a situation determination result indicating whether the user is walking or riding along with the position information of the carrier. The apparatus can receive and process not only the presence information of a mobile person who is walking, but also the presence information of a mobile person who has boarded the vehicle. Therefore, it can be avoided that information transmission from a pedestrian who has boarded the vehicle is stopped and cannot be understood. For example, even when the vehicle rides on a vehicle without an on-vehicle device on the vehicle side, Presence information can be obtained and processed.
According to the second aspect of the present invention, it is possible to transmit the vehicle determination result indicating whether the vehicle is a two-wheeled vehicle or a four-wheeled vehicle as the type of vehicle on which the carrier rides. Therefore, the vehicle-side in-vehicle device that has received the information on the carrier can execute processing according to the type of boarding.

FIG. 1 is a diagram showing an embodiment of a mobile device for inter-vehicle communication according to the present invention, and is a block diagram showing an overall configuration thereof. FIG. 2 is a block diagram showing the overall configuration of the in-vehicle device that communicates with the portable device. FIG. 3 is an explanatory diagram showing how the mobile device is used. FIG. 4 is a flowchart for explaining control processing in the portable device. FIG. 5 is a flowchart for explaining control processing in the portable device. FIG. 6 is a flowchart for explaining control processing in the portable device. FIG. 7 is an explanatory diagram for explaining a transmission cycle executed in the control process.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1-7 is a figure which shows one Embodiment of the portable apparatus for communication between vehicles which concerns on this invention.
In FIG. 1, the mobile device 100 functions as a communication terminal that can be carried by a pedestrian, for example, thereby constructing a so-called driving support system together with the in-vehicle device 200 shown in FIG. 2. These devices 100 and 200 exchange driving information with each other to execute a driving support process that informs the presence when making a right or left turn in an environment that is difficult to see, such as a T-junction or a crossroad. Here, in the present embodiment, a case where various types of information are directly exchanged between the apparatuses 100 and 200 will be described as an example. However, the present invention is not limited to this, and can be applied to a case where the information is exchanged via a relay communication station. Needless to say.

  The portable device 100 includes a control unit 101, a liquid crystal display unit 102 (may be an LED, etc.), a GPS antenna 103, an inter-vehicle communication antenna 106, an inter-vehicle communication circuit 107, a speaker 108S, a buzzer 108B, and a GPS receiving circuit 110. , An acceleration sensor 111G, a gyro sensor 111J, a battery 112, and a mode switching SW 113, and is installed in a multifunctional mobile phone (smart phone) that is portablely used by a pedestrian or the like, for example. Functions as a communication terminal.

The control unit 101 is constructed by a CPU, a memory, and the like, and performs overall control of the entire apparatus using stored power in the battery 112, thereby displaying and outputting various types of information on the liquid crystal display unit 102, and a speaker 108S. And buzzer 108B.
For example, when the control unit 101 executes a control process for functioning as a driving support system, the inter-vehicle communication circuit 107 communicates with the in-vehicle device 200 via the inter-vehicle communication antenna 106. Various information is exchanged by executing the protocol.
At this time, the control unit 101 acquires GPS information such as latitude and longitude by the GPS receiving circuit 110 via the GPS antenna 103, calculates its own position information, and wirelessly transmits it to the in-vehicle device 200 as pedestrian presence information. To do. That is, the GPS antenna 103 and the GPS receiving circuit 110 constitute a position detection function, and the inter-vehicle communication antenna 106 and the inter-vehicle communication circuit 107 constitute a transmission function.

  The in-vehicle device 200 includes a control unit 201, a liquid crystal display unit 202 (may be an LED or the like), a GPS antenna 203, a communication antenna for road facilities 204, a communication circuit 205 for road facilities, and a communication antenna 206 for vehicle steps. The vehicle-to-vehicle communication circuit 207, the speaker 208S, the buzzer 208B, the GPS receiving circuit 210, the acceleration sensor 211G, and the gyro sensation 211J are constructed. It functions as a composing communication terminal.

The control unit 201 is constructed by a CPU, a memory, and the like, and receives and supplies power from an in-vehicle battery to control the entire apparatus, thereby displaying various kinds of information on the liquid crystal display unit 202. Sound is output from the buzzer 208B.
For example, when executing the control process for functioning as a driving support system, the control unit 201 uses the inter-vehicle communication circuit 107 via the inter-vehicle communication antenna 206 and the portable device 100 or other vehicle-mounted devices. Various information is exchanged by executing a communication protocol with the apparatus 200.
At this time, the control unit 201 acquires GPS information such as latitude and longitude by the GPS receiving circuit 210 via the GPS antenna 203, calculates its own position information, and uses the mobile device 100 or other vehicle-mounted information as vehicle presence information. Wireless transmission to the device 200.
The control unit 201 acquires various road information from the road-to-road facility communication circuit 205 via the road-to-road facility communication antenna 204, selects a route for traveling, and sends the information to the liquid crystal display unit 202. Display output etc. Further, the control unit 201 grasps the movement and posture of the vehicle based on the detection information of the acceleration sensor 211G and the gyro sensor 211J, and outputs the display information to the liquid crystal display unit 202.

  The portable device 100 and the in-vehicle device 200 calculate the distance and the direction of travel with the approaching partner based on the presence information of the surrounding pedestrians and vehicles received by the control units 101 and 201, respectively, and may cause a collision or the like. The calculation result is displayed and output to the liquid crystal display units 102 and 202 as necessary, and the sound is output from the speakers 108S and 208S and the buzzers 108B and 208B. For example, a pedestrian (carrying person) carrying the mobile device 100 can call attention by listening to a voice output saying “the vehicle is approaching from the right”.

  Then, the portable device 100 determines the situation of the pedestrian detected by the acceleration sensor 111G and the gyro sensor 111J by the control unit 101 as a situation determination result in the in-vehicle device 200 including the type of vehicle boarding and the type of the boarding vehicle described later. Transmission is performed via the inter-communication antenna 106 and the inter-vehicle communication circuit 107. That is, the control unit 101 constitutes a situation determination unit, a vehicle type determination unit, and a transmission control unit. Thereby, the in-vehicle device 200 can continuously grasp the situation of the pedestrian carrying the mobile device 100.

  This portable device 100 can be selectively switched by the mode switching SW 113 as to whether or not it functions as the driving support system described above. As a result, as shown in FIG. 3, when the vehicle on which the in-vehicle device 200 is installed is boarded, the mode switching SW 113 turns off the boarding mode to set the vehicle 300B, the portable device 100 stops transmission, and only the in-vehicle device 200 is transmitted. Sends and receives. Thereby, the receiving frequency of the other vehicle-mounted apparatus 200 can be reduced and communication load can be reduced. Moreover, the power consumption of the portable apparatus 100 and the other vehicle-mounted apparatus 200 can be suppressed.

Specifically, the control unit 101 of the mobile device 100 executes the control program shown in the flowcharts of FIGS. 4 to 6 when the CPU executes a control program stored in advance in the memory based on the stored / acquired data. (Driving support processing method) is started.
Specifically, as shown in the flowchart of FIG. 4, the control unit 101 first confirms whether or not there is a change in the speed of the carrier detected by the acceleration sensor (so-called G sensor) 111G (step S101), and changes the speed. If there is, the periodicity is extracted from the detection data of the acceleration sensor 111G (step S102), and whether or not the periodicity is longer than a predetermined value (threshold) Tb set in advance together with the presence or absence of the periodicity is confirmed. (Step S103).

In this step S103, if the detection data of the acceleration sensor 111G is not periodic, that is, if there is no periodicity such as when the legs are alternately advanced at a constant rhythm, the process proceeds to step S111 and it is determined that the vehicle is boarded. . Further, even when periodicity is extracted, the periodic period is equal to or less than the predetermined value Tb, that is, even if there is periodicity, a change in the road surface that is smaller than the periodic period of the shortest time in which the legs are alternately advanced is picked up. Similarly, when the cycle is short, the process proceeds to step S111, and it is determined that the vehicle is boarded.
In step 103, when the periodic period of the periodicity of the detection data of the acceleration sensor 111G is longer than the specified value Tb, the peak value (absolute value) of the detection data of the acceleration sensor 111G is confirmed (step S104). When the peak value is larger than a predetermined value (threshold value) Gb set in advance, that is, when the acceleration is large, which is impossible unless the vehicle, the process similarly proceeds to step S111 and it is determined that the vehicle is boarded.

In step S104, when the peak value of the detection data of the acceleration sensor 111G is equal to or less than the specified value Gb, it is determined that the user is walking including running (step S105).
In step S105 in which it is determined that the vehicle is walking and in step S111 in which it is determined that the vehicle is on board, the identification information of the pedestrian and the identification information of the pedestrian boarding are stored in the identification flag so as to be usable in a control process described later.
After these steps S105 and S111, the identification information of the pedestrian and the pedestrian boarding is held in the identification flag for a predetermined time (step S112), and the same processing is repeated by returning to step S101. .

  Subsequently, as shown in the flowchart of FIG. 5, the control unit 101 determines that the vehicle is being boarded in step S111 (identification information of the pedestrian boarding is stored in the identification flag), and detection data of the acceleration sensor 111G. If it is determined that the vehicle is stopped (steps S201 and S202), the period and duration of the detection data of the acceleration sensor 111G are further confirmed (step S203).

  In step S203, the cycle period is shorter than a preset specified value (threshold value) Ta, that is, when the vibration of the engine (internal combustion engine) is directly transmitted, or when the cycle time is shorter than the specified value Ta. If vibration that has continued to be longer than the length La that can be determined to be always continuous even during a long period of time has been transmitted, it is determined that the vehicle is on a two-wheeled vehicle that easily transmits vibration (step S204). On the other hand, if the cycle period is equal to or greater than the prescribed value Ta or the vibration continues only when the regularity determination length La is less than or equal to, it is determined that the vehicle rides on a four-wheeled vehicle with little engine transmission vibration (step S211). At this time, the control unit 101 may check whether or not the posture is shaken based on the detection data of the gyro sensor 111J and determine whether or not the vehicle is in a two-wheeled vehicle.

In steps S204 and S211 where it is determined that the two-wheeled vehicle or the four-wheeled vehicle is being boarded, the identification information of the two-wheeled vehicle and the identification information of the four-wheeled vehicle are stored in the identification flag so as to be usable in a control process described later.
After these steps S204 and S211, while the identification information of the two-wheeled vehicle or the four-wheeled vehicle is held for a predetermined time in the identification flag (step S212), the process returns to step S201 and the same processing is performed. repeat.

Subsequently, as shown in the flowchart of FIG. 6, the control unit 101 confirms whether or not walking is performed from the identification flag (step S <b> 301). It is determined from the detected data whether or not it is stopped (step S311).
If it is determined in this step S311 that walking is stopped, presence information such as position information and speed information acquired by the GPS antenna 103, the GPS receiving circuit 110, the acceleration sensor 111G, and the gyroscope 111J is transmitted in-vehicle at the transmission cycle T3. It transmits to the apparatus 200 (step S312).
If it is determined in step S311 that the pedestrian is not stopped, presence information such as position information and speed information is transmitted to the in-vehicle device 200 in the transmission cycle T4 (step S313).
Thereby, the vehicle-mounted device 200 can grasp the presence of the pedestrian and notify the occupant of the approach information of the pedestrian as necessary, and the vehicle-mounted device 200 has a function of notifying the portable device 100. When equipped, the presence information of the vehicle can be transmitted to notify pedestrians of vehicle approach information.

  In step S301, when it is not walking and the storage of the pedestrian is confirmed from the identification flag, the control unit 101 confirms whether or not the on-board mode ON is selected and set in the mode switching SW113. (Step S302), when the boarding mode is OFF, the process proceeds to Step S321 as it is, returns to Step S301 with the transmission stopped, and repeats the same processing.

  In addition, in step S302, when it is confirmed that the boarding mode ON is selected, a reaching speed that is derived and held by accumulating changes in detection data of the acceleration sensor 111G is set in advance. It is confirmed whether or not the value (threshold value) S1 or more (step S303).

In this step S303, when it is confirmed that the vehicle is out of the specified speed S1, the two-wheel / four-wheel vehicle acquired by the GPS antenna 103, the GPS receiving circuit 110, the acceleration sensor 111G, and the gyrosensor 111J at the transmission cycle T2. The presence information including the type is transmitted to the in-vehicle device 200 (step S304).
If it is confirmed in step S303 that the specified speed S1 has not been reached, similar presence information is transmitted to the in-vehicle device 200 in the transmission cycle T1 (step S305).

Here, as shown in FIG. 7, the transmission cycle T1 described above is selected during low-speed traveling that does not reach the specified speed S1, and therefore it is sufficient to provide information to the in-vehicle device 200 at longer intervals. It is possible to avoid frequently occupying the communication path and increasing power consumption. On the other hand, since the transmission cycle T2 described above is selected when traveling at a high speed of the specified speed S2 or higher, the information provided to the in-vehicle device 200 can be updated in a short cycle. For this reason, the traveling distance per unit time of the vehicle increases during high-speed traveling, but information can be updated before traveling a predetermined distance.
Further, since the transmission cycle T3 described above is selected while walking is stopped, it is sufficient to provide information to the in-vehicle device 200 at intervals longer than the transmission cycle T1, and the transmission cycle T4 selected during walking. Is set to an interval that can provide information to the in-vehicle device 200 with sufficient frequency during walking between the transmission cycles T2 and T3.

Thereby, even after the pedestrian gets on the vehicle on the in-vehicle device 200 side, various information such as the position and speed including the type of the vehicle can be acquired, and the approach information of the vehicle on which the pedestrian gets on, etc. It is possible to grasp and notify the occupant as necessary.
Further, when the in-vehicle device 200 has a function of notifying the mobile device 100, vehicle presence information and the like are transmitted to the owner of the mobile device 100 that transmits its own presence information and gets on a vehicle without a driving support system. Can be notified.
At this time, the driving support system can be comfortably used as it is simply by selecting and switching the mode switching SW 113 depending on whether or not the in-vehicle device 200 is mounted on the vehicle on which the vehicle is to be boarded.

  The scope of the present invention is not limited to the illustrated and described exemplary embodiments, but includes all embodiments that provide the same effects as those intended by the present invention. Further, the scope of the invention is not limited to the combinations of features of the invention defined by the claims, but may be defined by any desired combination of particular features among all the disclosed features. .

100 Mobile device 101, 201 Control unit 102, 202 Liquid crystal display unit 103, 203 GPS antenna 106 vs. inter-vehicle communication antenna 107 vs. inter-vehicle communication circuit 108B, 208B Buzzer 108S, 208S Speaker 110, 210 GPS receiving circuit 111G, 211G Acceleration Sensor 111J, 211J Gyro sensor 112 Battery 113 Mode switching SW
200 In-vehicle device 204 Communication antenna for road facility 205 Communication circuit 206 for road facility Communication antenna for vehicle step 207 Communication circuit for vehicle step 300A, 300B Vehicle

Claims (2)

A portable device having at least a position detection function and a transmission function, and performing communication with the vehicle side,
A situation determination unit that determines whether the wearer is walking or riding, and a transmission control unit that causes the transmission function to transmit detection position information by the position detection function together with a situation determination result by the situation determination unit A portable device for inter-vehicle communication characterized by the above. A vehicle type determination unit that determines whether the vehicle on which the carrier rides is a two-wheeled vehicle or a four-wheeled vehicle;
The portable device for inter-vehicle communication according to claim 1, wherein the transmission control unit causes the transmission function to transmit the vehicle determination result including the vehicle type determination unit.

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