JP2010211610A - Apparatus for providing vehicle trajectory information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for providing vehicle trajectory information that reliably transmits data accumulated in a vehicle through low-cost communication with a radio beacon. <P>SOLUTION: The apparatus for providing vehicle trajectory information includes a trajectory acquiring means for acquiring a trajectory of the vehicle; a communication means for communicating with the radio beacon installed at a road, a control means for controlling the communication means to transmit the trajectory of the vehicle acquired by the trajectory acquiring means to the radio beacon, and a vehicle speed acquiring means for acquiring the speed of the vehicle. The control means changes the control when transmitting the trajectory of the vehicle to the radio beacon on the basis of the speed of the vehicle acquired by the vehicle speed acquiring means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicular travel trajectory information providing apparatus that transmits a travel trajectory of a host vehicle to a center via a wireless sign, and is used for other vehicles.

  2. Description of the Related Art Conventionally, navigation devices that perform route guidance to a destination by referring to map data stored in a storage medium such as a CD-ROM or DVD have been widely used. One of the problems in such a navigation device is that the map data stored in the storage medium is not necessarily the latest, and does not cover all the roads in the country.

  Such problems can be solved to a considerable extent by downloading the latest map data from the center using the in-vehicle Internet equipment. When such a method is used, it is effective to generate the latest and detailed map data from the traveling locus of the vehicle (probe car). Therefore, a mechanism for uploading the traveling locus acquired in the vehicle to the center is required.

  In relation to this, an invention has been disclosed regarding a navigation system that forms and stores a travel locus of the host vehicle every time the traveling direction of the host vehicle changes by a certain amount (see, for example, Patent Document 1).

  Further, in the mobile terminal, it is determined whether or not the road map read from the server matches the position information of the own terminal, and if not, the position information of the own terminal is output to the server as new road position information. An invention concerning a correction system is disclosed (for example, see Patent Document 2).

JP-A-9-292251 JP 2008-170277 A

  By the way, in order to upload the travel locus acquired in the vehicle to the center, in addition to a method using a wide-area communication network such as a mobile phone network, it is close to various beacons (wireless signs) used in VICS (registered trademark). A method for performing communication is conceivable. Here, if a wide area communication network such as a cellular phone network is used, the communication cost may increase. Therefore, there is an actual advantage of adopting a method for performing short-range communication with various beacons.

  However, since communication with various beacons performs infrared communication or the like, the transmission / reception area is limited. Therefore, when the transmission data is large, there is a case where not all data can be transmitted. In this regard, the system described in Patent Document 2 does not consider anything.

  The present invention is for solving such problems, and provides a vehicle travel locus information providing apparatus capable of reliably transmitting data accumulated in the host vehicle through low-cost communication with a radio sign. This is the main purpose.

In order to achieve the above object, one embodiment of the present invention provides:
Traveling locus acquisition means for acquiring the traveling locus of the host vehicle;
Communication means for communicating with radio signs installed on the road;
Control means for performing control for transmitting the travel locus of the host vehicle acquired by the travel locus acquisition means to the wireless sign by the communication means;
A vehicle travel locus information providing device comprising:
Vehicle speed acquisition means for acquiring the vehicle speed of the host vehicle,
The control means changes control when transmitting the traveling locus of the host vehicle to the radio sign based on the vehicle speed of the host vehicle acquired by the vehicle speed acquiring unit.
It is a travel locus information providing device for vehicles.

  According to this aspect of the present invention, since the control for transmitting the travel locus of the host vehicle to the wireless sign is changed based on the vehicle speed of the host vehicle acquired by the vehicle speed acquisition means, the host vehicle is wireless at high speed. When passing through the sign transmission / reception area, it is possible to avoid the inconvenience that all data cannot be transmitted. Therefore, the data accumulated in the own vehicle can be reliably transmitted by low-cost communication with the wireless sign.

In one embodiment of the present invention,
When the vehicle speed of the host vehicle acquired by the vehicle speed acquisition unit is equal to or higher than a predetermined vehicle speed, the control unit decelerates according to the difference between the vehicle speed of the host vehicle acquired by the vehicle speed acquisition unit and the predetermined vehicle speed. It may be a means for performing control or divided transmission control.

  ADVANTAGE OF THE INVENTION According to this invention, the driving | running | working locus information provision apparatus for vehicles which can transmit the data accumulate | stored with the own vehicle reliably by low-cost communication with a radio | wireless sign can be provided.

1 is a system configuration example of a vehicle travel locus information providing device 1 according to an embodiment of the present invention. It is a figure which shows a mode that the vehicle carrying the vehicle travel locus information provision apparatus 1 transmits route data to the beacon 80. It is a figure which shows the driving | running | working locus | trajectory of the own vehicle produced | generated by connecting a relay point. It is a figure which shows a mode that a user can confirm route data in a display apparatus. It is an example of the navigation display produced | generated using route data. It is a flowchart which shows the flow of the characteristic process which the traveling locus information provision control part 38 performs. It is a flowchart which shows the flow of the characteristic process which the traveling locus information provision control part 38 performs. It is another figure which shows a mode that a user can confirm route data in a display apparatus. It is another example of the navigation display produced | generated using route data.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.

  Hereinafter, a vehicle travel locus information providing apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings. The vehicle travel locus information providing device 1 shares the main configuration with the in-vehicle navigation device, and transmits the travel locus of the host vehicle to the center via a wireless sign such as a beacon so that it can be used for other vehicles. Device. At the same time, in the host vehicle, it is preferable to improve the navigation function by receiving the travel locus of the other vehicle from the center and updating the map information.

[Constitution]
FIG. 1 is a system configuration example of a vehicle travel locus information providing apparatus 1 according to an embodiment of the present invention. The vehicle travel locus information providing device 1 includes a GPS (Global Positioning System) receiver 10, an input / output device 12, a storage device 20, a navigation ECU (Electronic Control Unit) 30, a vehicle speed sensor 40, and a steering angle sensor. 42 and the communication device 50.

  The GPS receiver 10 receives radio waves transmitted from GPS satellites, demodulates them, and outputs navigation messages (satellite signals) included in the radio waves. The navigation message includes information on the satellite orbit, the correction value of the satellite clock, the correction coefficient of the ionosphere, the health message indicating the operation state of the satellite itself, and the like.

  The input / output device 12 includes, for example, a microphone, a speaker, a buzzer, a display device, an input switch, and the like. The display device is configured as, for example, a touch panel, sets a GUI (Graphical User Interface) switch at a predetermined position on the screen, and detects a voltage change or the like to recognize the touch position of the user.

  The storage device 20 is, for example, a storage device such as an HDD (Hard Disk Drive), a DVD (Digital Versatile Disk) drive, a CD-R (Compact Disc-Recordable) drive, or a flash memory, and the storage medium includes map data 22. Is remembered. The map data 22 represents, for example, an intersection or the like, and expresses a road shape by a node point having coordinates (latitude, longitude) and a link that connects the node points and stores a road width and a road curvature along with it. is doing. Further, the map data 22 includes information including coordinates such as main facilities, intersections, and place names as destination candidates.

  The navigation ECU 30 is, for example, a computer unit in which a ROM, a RAM, and the like are connected to each other via a bus with a CPU at the center. In addition, an internal storage device 32 such as an EEPROM (Electronically Erasable and Programmable Read Only Memory) or an I / O O port, timer, counter, etc. are provided. The ROM stores programs and data executed by the CPU. Further, the navigation ECU 30 is connected to a control device such as a light ECU 60 that performs illumination control including a hazard lamp and an engine ECU 62 that performs engine control in an integrated manner via multiple communication lines.

  The navigation ECU 30 is a main functional block that functions when the CPU executes a program stored in the ROM, a current position specifying unit 34, a recommended route generating unit 35, a route guiding unit 36, A trajectory information provision control unit 38.

[Basic navigation functions]
The current position specifying unit 34 analyzes navigation messages from a plurality of GPS satellites, and specifies the current position of the vehicle (referred to as latitude, longitude, and altitude). Specifically, the position (Xs, Ys, Zs) of each GPS satellite in the world coordinate system (for example, WGS84) is calculated from the satellite orbit information included in the navigation message and the radio wave arrival time (arrival time-transmission time). ) Is multiplied by the speed of light to calculate a pseudo distance between each GPS satellite and the vehicle, and the pseudo position and position calculated for the plurality of GPS satellites are used to calculate the current position of the vehicle based on the principle of triangulation. Note that the current position of the vehicle may be corrected based on the output of various sensors such as the vehicle speed sensor 40 and the gyro sensor.

  The recommended route generation unit 35 generates a recommended route from the current position of the host vehicle specified by the current position specifying unit 34 to the destination set by the user using the Dijkstra method or the like, and outputs the recommended route to the route guide unit 36. . This process is repeatedly executed according to the transition of the current position of the host vehicle.

  The route guidance unit 36 controls navigation display and voice guidance using the input / output device 12 so that the host vehicle can travel along the recommended route generated by the recommended route generation unit 35. Specifically, the input / output device 12 is controlled so as to perform left / right turn guidance at intersections, use guidance on highways, guidance that the destination is approaching, and the like.

[Characteristic processing]
By the way, route guidance is performed using the map data 22 in this way, but the map data 22 is not necessarily the latest, and does not cover all the roads in the country.

  Therefore, in this embodiment, route data generated by the outputs of the vehicle speed sensor 40 and the steering angle sensor 42 is stored in the internal storage device 32 and transmitted to the beacon 80 using the communication device 50. The beacon 80 is connected to the server 90 in the information center, and data acquired in the host vehicle is provided from the server 90 to each vehicle. FIG. 2 is a diagram illustrating a state in which a vehicle equipped with the vehicle travel locus information providing device 1 transmits route data to the beacon 80.

  The beacon 80 is, for example, an optical beacon provided with a radio transceiver. In addition, not only this but optical beacon itself may be sufficient, and a radio wave beacon may be sufficient.

  The vehicle speed sensor 40 includes, for example, a wheel speed sensor attached to each wheel of the vehicle and a skid control computer, and the skid control computer converts the wheel speed pulse signal output from the wheel speed sensor into a vehicle speed rectangular wave pulse signal (vehicle speed signal). Convert and output. The steering angle sensor 42 is disposed inside the steering column, for example, and outputs a steering angle signal indicating the turning angle of the steering.

  In the route data, for example, a point where the steering angle is equal to or greater than a predetermined angle and returned to an angle indicating a neutral position is set as “relay point n”, and coordinates of each relay point are stored. FIG. 3 is a diagram illustrating a travel locus of the host vehicle generated by connecting relay points in this way.

  The route data is converted into an ID number, for example. The ID number includes a number indicating the area name in the license plate of the host vehicle (for example, “033” is defined as “Numazu”), a subsequent number, and a number indicating the route.

  Further, as shown in FIG. 4, the route data can be confirmed by the user on the display device. As a result, it is possible to perform processing such as determining whether or not the user will delete or provide the server 90 later. Note that such a screen may be displayed, for example, at a timing such as ignition off so that the user can delete it.

  The route data generated in the host vehicle can be used for route guidance in the host vehicle as well as being provided to the server 90. FIG. 5 is an example of a navigation display generated using route data.

  However, as shown in FIG. 2, infrared communication or the like is performed in communication with the beacon 80, so the transmission / reception area is limited. Therefore, when the transmission data is large, there is a case where not all data can be transmitted. Such inconvenience tends to occur when the host vehicle passes through the transmission / reception area of the beacon 80 at high speed.

  Therefore, in this embodiment, the control for transmitting route data to the beacon 80 (via the server 90) is changed based on the vehicle speed signal input from the vehicle speed sensor 40.

  6 and 7 are flowcharts showing the flow of characteristic processing executed by the travel locus information provision control unit 38. FIG.

  First, it waits until the own vehicle approaches a beacon (S100). In this determination, for example, the position of the beacon is registered in the map data 22, and this may be referred to, or a warning radio sign provided before the beacon may be detected. Alternatively, it may be determined that the host vehicle has approached the beacon simply by entering the beacon transmission / reception area.

  When the host vehicle approaches the beacon, a transmission data size check of route data to be transmitted this time is performed (S102). The route data to be transmitted this time is previously selected by the user as described above.

  Next, the transmission time is calculated by dividing the transmission data size by the transmission rate (S104), and the distance in the road longitudinal direction of the transmission / reception area is divided by the transmission time to calculate the target travel speed V # ( S106). As the transmission rate, a value determined in advance by a communication method with a beacon is used.

  Then, it is determined whether or not the most recently input vehicle speed V is less than the target travel speed V # (S108). If the vehicle speed V is less than the target travel speed V #, the communication device 50 is instructed to transmit route data to the beacon 80 (S110).

  On the other hand, if the vehicle speed V is equal to or higher than the target travel speed V #, it is determined whether the vehicle speed V is less than 120% of the target travel speed V # (S112).

  If the vehicle speed V is less than 120% of the target travel speed V #, the light ECU 60 is instructed to blink the hazard lamp (S114), and then the engine ECU 62 causes the vehicle speed V to be less than the target travel vehicle speed V #. (S116), and then instructs the light ECU 60 to turn off the hazard lamp (S118). Note that these processes are sequentially performed after a certain amount of time has elapsed. Then, the communication device 50 is instructed to transmit the route data to the beacon 80 (S110).

  When the vehicle speed V is 120% or more of the target travel speed V #, divided transmission control is performed (S200 to S216). This is because if the deceleration is too large, the control of S112 to S116 may confuse the subsequent vehicle.

  The divided transmission control will be described with reference to FIG.

  First, it is determined whether or not data transmission is in progress (S200). If it is not during data transmission, the divided transmission control is terminated.

  If data transmission is in progress, the distance in the longitudinal direction of the transmission / reception area is divided by the vehicle speed V to calculate the transmission / reception area passage time (S202), and the data transmission time calculated in S104 is divided by the transmission / reception area passage time. The required transmission / reception frequency X is calculated (S204).

  Then, it is determined whether the required transmission / reception count X exceeds 1 (S206).

  If the required transmission / reception count X exceeds 1, the unit transmission / reception data amount is calculated by multiplying the transmission rate by the transmission / reception area passage time calculated in S202 (S208), and only the data corresponding to the unit transmission / reception data amount is transmitted. Thus, the communication device 50 is instructed (S210), and the communication device 50 is instructed to transmit a flag indicating that transmission is in progress to the beacon 80 (S212), and the split transmission control is terminated.

  On the other hand, if the required transmission / reception count X does not exceed 1, the communication apparatus 50 is instructed to transmit all of the route data to the beacon 80 (S214), and further, the communication apparatus is configured to transmit a completion flag to the beacon 80. 50 (S216), and the divisional transmission control is terminated.

  According to the vehicle travel locus information providing apparatus 1 of the present embodiment described above, since the control when transmitting route data to the beacon 80 based on the vehicle speed V input from the vehicle speed sensor 40 is changed, When passing through the transmission / reception area of the beacon 80 at high speed, it is possible to avoid the inconvenience that all data cannot be transmitted. Therefore, the data accumulated in the host vehicle can be reliably transmitted by low-cost communication with the beacon 80.

  The best mode for carrying out the present invention has been described above with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the scope of the present invention. And substitutions can be added.

  For example, the average road slope for each point is registered in the route data, and the total travel distance, average fuel consumption, estimated arrival time, etc. are displayed in cooperation with the VICS (registered trademark) information in the navigation display. May be. FIG. 8 shows an example of route data display in this case, and FIG. 9 shows an example of navigation display.

  Here, the total travel distance is the total distance from P1 to Pn, and the average fuel consumption is determined by referring to the average fuel consumption map for each inclination of the host vehicle stored in advance in the ROM, etc. calculate. The section average fuel efficiency is obtained by summing the section average fuel efficiency multiplied by the section distance and dividing the sum by the total travel distance (see the following equation (1)).

  (Section average fuel consumption) = Σ {(Section average fuel consumption) × (Section distance)} / (Total travel distance) (1)

  Further, the estimated arrival time can be obtained by adding the current time to the travel distance multiplied by the traffic jam coefficient and dividing by the legal vehicle speed (see the following equation (2)). The traffic congestion coefficient is obtained by assigning values of 2.0, 1.5, 1.0, etc. to “congestion”, “congestion”, and “smoothness” included in the VICS information, respectively.

  (Estimated arrival time) = (current time) + (travel distance) × (congestion coefficient) / (statutory vehicle speed) (2)

  The present invention can be used in the automobile manufacturing industry, the automobile parts manufacturing industry, and the like.

DESCRIPTION OF SYMBOLS 1 Vehicle travel locus information provision apparatus 10 GPS receiver 12 Input / output device 20 Storage device 22 Map data 30 Navigation ECU
32 Internal storage device 34 Current position specifying unit 35 Recommended route generating unit 36 Route guiding unit 38 Traveling track information providing control unit 40 Vehicle speed sensor 42 Steering angle sensor 50 Communication device

Claims (1)

Traveling locus acquisition means for acquiring the traveling locus of the host vehicle;
Communication means for communicating with radio signs installed on the road;
Control means for performing control for transmitting the travel locus of the host vehicle acquired by the travel locus acquisition means to the wireless sign by the communication means;
A vehicle travel locus information providing device comprising:
Vehicle speed acquisition means for acquiring the vehicle speed of the host vehicle,
The control means changes control when transmitting the travel locus of the host vehicle to the wireless sign based on the vehicle speed of the host vehicle acquired by the vehicle speed acquisition unit.
Vehicle travel locus information providing device.