JP2004303157A - Tracking vehicle search device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent to the utmost a vehicle whose destination is accidentally the same from being erroneously determined as the tracking vehicle in a tracking vehicle searching device which determines that, when the same vehicle is continuously detected as a following vehicle for a fixed time, the vehicle is a tracking vehicle. <P>SOLUTION: A sightseeing facility or the like is decided as a specific facility, and when its own vehicle is present within a preliminarily decided distance from the specific facility, besides the condition that the same vehicle is continuously received as a following vehicle in a preliminarily set time, another additional condition that the same vehicle turns at a national road, for example, 20 times or more is set, and as long as the additional condition is fulfilled, the vehicle is decided as a tracking vehicle. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tracked vehicle search device that detects, when a host vehicle is tracked by another vehicle, this.
[0002]
[Prior art]
One of the vehicle security systems is a tracked vehicle search device that can detect the presence of a vehicle that tracks and tracks the vehicle in order to see the behavior and privacy of the driver. (For example, see Patent Document 1). In this apparatus, another vehicle information receiving means for receiving information of another vehicle is provided, and when the same vehicle is continuously detected by the other vehicle information receiving means for a certain period of time, the vehicle is determined to be a tracking vehicle and an image or sound is determined. It is configured to notify the driver by such as.
[0003]
[Problems to be solved by the invention]
If the same vehicle is continuously detected for a certain period of time, in the method of determining that the vehicle is a tracking vehicle, for example, if the destination is a sightseeing spot, the closer to the sightseeing spot, the more the vehicle travels toward the same place. Since the number of other vehicles increases, there is a problem that another vehicle that is accidentally traveling toward the same destination is determined as a tracking vehicle.
[0004]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tracked vehicle search device that can prevent a vehicle having the same destination from being accidentally determined as a tracked vehicle as much as possible. There.
[0005]
[Means for Solving the Problems]
According to the present invention, when the own vehicle is in a predetermined area for a predetermined specific facility, a state of receiving information from the same vehicle lasts for a predetermined time, and a predetermined additional condition is satisfied. When the vehicle is satisfied, the vehicle is determined to be a tracking vehicle.
According to this configuration, when the state of receiving the information of the same vehicle continues for a preset time, the vehicle is not immediately determined to be a tracking vehicle. For example, a specific facility such as a sightseeing spot or a large commercial facility is used. Therefore, if the own vehicle is in the area defined for the specific facility, the vehicle is determined to be the tracked vehicle only when the additional conditions are satisfied, so the other vehicle whose destination is the same by accident is tracked The determination as a vehicle can be prevented as much as possible.
In this case, the additional condition may be the number of turns at the intersection.
[0006]
Further, the specific facility and the additional condition may be set by the user. According to this, by setting the home or office as the specific facility, it is possible to prevent the vehicle of a person who lives or works around the home or office from being used as a tracking vehicle as much as possible.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The invention assumes that each vehicle is provided with an electronic license plate. This electronic license plate 1 functions as a transmitting means and a receiving means, and comprises an antenna 2, a communication circuit 3, a CPU 4, a ROM 5, and a RAM 6, as shown in FIG. It is built into the front and rear license plates. The ROM 5 stores an operation program as an electronic license plate, and also stores vehicle information such as the vehicle number, vehicle type, weight, owner, vehicle inspection information, and displacement of the own vehicle. It is transmitted from the communication circuit 3 via the antenna 2. Further, the electronic license plate 1 receives the vehicle information transmitted from the electronic license plate 1 of another vehicle and temporarily stores the vehicle information in the RAM 6. Further, the electronic license plate 1 is provided with a Bluetooth (registered trademark) interface unit 8 for transmitting and receiving data to and from a car navigation device 7 as an in-vehicle device. The electronic license plate 1 and the car navigation device 7 may be connected by a signal line.
[0008]
The car navigation device 7 of the present embodiment also serves as a tracked vehicle search device, and determines whether or not a tracked vehicle exists based on other vehicle information acquired by the electronic license plate 1 in addition to the original car navigation function. It also has functions. As shown in FIG. 1, the car navigation device 7 includes a control circuit 9 as a control unit, a position detector 10 as a position acquisition unit, and a map data input unit 11 as a map data acquisition unit. , An external memory 12, a display device 13 as a notification device, an operation switch group 14, an audio output device 15 as a notification device, a remote control sensor 17 for detecting a signal from a remote controller 16, and transmission and reception of data to and from the electronic license plate 1. It is configured by connecting a Bluetooth interface unit 18 and the like.
[0009]
The control circuit 9 is configured as a microcomputer, and includes a CPU, a ROM, a RAM, and an I / O interface (all not shown). Of these, the ROM stores programs for car navigation and tracking vehicle determination and the like, and the RAM temporarily stores processing data at the time of program execution and road map data acquired from the map data input device 10. Is done.
[0010]
Signals from a position detector 10, a geomagnetic sensor 19 for detecting an absolute azimuth, a gyroscope 20 for detecting a yaw angular velocity (yaw rate), a distance sensor 21 for detecting a traveling distance of the vehicle, and signals from a GPS satellite. This is a part for calculating current position information (longitude / latitude information) of the vehicle. The position detector 10 performs high-accuracy position detection while interpolating the detection errors because each component has a detection error having a different property. However, the current position is detected with the required detection accuracy. It is not necessary to provide all components if they can be calculated. Further, the position detector 10 may be configured by combining a rotation sensor of the steering wheel, a wheel sensor for detecting the rotation of each tire, and the like.
[0011]
The map data input device 11 is for reading data from a large-capacity information recording medium 23 such as a CD-ROM or a DVD-ROM. In this case, in addition to various types of map drawing data and map matching data, the information recording medium includes a facility name database in which facility names are arranged in, for example, the Japanese syllabary order, and specific information on each facility in the facility name database. A variety of map databases are stored, such as a facility database that covers information (such as facility names, genre names indicating categories of occupations, etc., facility location data (longitude / latitude data), etc.), and a phone number database that shows correspondence between phone numbers and facilities. Have been. Note that a hard disk, a magneto-optical disk, a large-capacity memory card, or the like can be used as the information recording medium.
[0012]
The external memory 12 is configured by a flash memory card or the like, and is provided, for example, for storing program software for supporting an information recording medium of another standard, and for storing and recalling specific data. ing.
The display device 13 includes, for example, a color liquid crystal display for displaying a map screen, and is installed near the driver's seat of the vehicle. The operation switch group 14 includes a mechanical switch disposed around the display device 13 and a touch switch formed on a color liquid crystal display of the display device 13, and controls operation inputs such as various data and setting items by a control circuit. 9 is provided. The remote control sensor 17 is also provided as an operation input means, and receives an operation input from the remote control 16 and gives it to the control circuit 9.
The voice output device 15 includes a voice synthesis circuit, an amplifier, a speaker, and the like, and can generate an arbitrary voice output according to voice information from the control circuit 9.
[0013]
Here, in addition to the basic function of executing a map matching process for positioning the current position on the map, the control circuit 9 receives point data such as a destination and a waypoint via the operation switch group 14 and the remote controller 16. The route calculation function of performing a route search operation from the current position to the destination based on the point data using, for example, the Dijkstra method, and displaying a guide route according to the route search result on a map screen ( It includes a well-known support function such as a so-called reroute search function) and a route guidance function of performing various guides by voice or display based on the guidance route obtained by this function.
[0014]
When the car navigation device 7 determines the presence of a tracked vehicle, when the information from the same vehicle is continuously received for a preset time (determination time) (first determination criterion), the vehicle is tracked by the tracked vehicle. However, when it is in the area (applied area) inside a circle of a predetermined radius (additional condition application radius) defined for each specific facility around the specific facility, in this embodiment, near a preset specific facility. When the additional condition (the second determination criterion) is satisfied in addition to the first criterion, the vehicle is determined to be a tracking vehicle.
[0015]
FIG. 6 shows specific facilities and their additional conditions. According to FIG. 6, for the XX aquarium, when the vehicle is within the applicable area of the additional condition application radius of 1000 m from the XX aquarium, the number of turns on the national road is 20 or more, and for the YY zoo, When your vehicle is within the applicable area of the additional condition applicable radius of 800 from the YY zoo, you must bend at least 20 times on the national road or prefectural road. When the vehicle is in the area, the vehicle must turn ten times at the intersection regardless of the road type, as additional conditions. The specific facility, the radius of application of the additional condition for adding the additional condition to the determination criterion, and the content of the additional condition are tabulated and stored in the external memory (additional condition storage means) 12.
[0016]
Next, in the above configuration, the operation of determining the tracking vehicle will be described with reference to the flowcharts of FIGS.
First, the electronic license plate 1 of the vehicle repeats the information collecting process shown in FIG. 3 at fixed time intervals, for example, every second. That is, the CPU 4, which is a control means of the electronic license plate 1 provided on the rear side of the vehicle, provides the vehicle information (along with the ID information) for the vehicle (following vehicle) existing within a predetermined range (search range) behind the own vehicle. Is transmitted (step A1). Upon receiving the request for reading the vehicle information, the CPU 4, which is a control means of the electronic license plate 1 provided on the front side of the following vehicle, transmits the information such as the vehicle number of the own vehicle from the ROM 5 and transmits the request for reading the vehicle information. To the electronic license plate 1.
[0017]
When the rear electronic license plate 1 receives the vehicle information transmitted from the following vehicle (“YES” in step A2), the CPU 4 transmits the vehicle information received from the Bluetooth interface unit 18 to the Bluetooth interface unit of the car navigation device 7. 8 (step A3). The Bluetooth interface unit 8 of the car navigation device 7 that has received the vehicle information sends the vehicle information to the control circuit 9.
[0018]
When the control circuit 9 of the car navigation device 7 enters the execution of the tracking vehicle presence determination process of FIG. 4, first, it initializes a timer for counting the determination time and starts a timekeeping operation (step B1). When receiving the vehicle information of the following vehicle from the electronic license plate 1 on the rear side of the own vehicle, the control circuit 9 stores the vehicle information in the external memory 12 ("YES" in step B2, step B3).
[0019]
Next, the control circuit 9 determines whether the vehicle information received this time matches the vehicle information received last time, and if they do not match ("NO" in step B4), the first determination time is counted. The process returns to step B1 where the timer is initialized and started. If the vehicle information received this time matches the vehicle information received last time ("YES" in step B4), control circuit 9 determines whether or not a specific facility is registered (step B5). If the specific facility is not registered ("NO" in step B5), if the state in which the vehicle information received this time matches the vehicle information received last time continues until the determination time elapses, the vehicle is determined as follows. A pursuit warning is displayed on the screen of the display device 13 as a pursuit vehicle, and "the pursuit vehicle is present. The vehicle number of the pursuit vehicle is xxx" is displayed, and the same is notified from the voice output device 15 by voice. (Step B7), and returns.
[0020]
When the specific facility is registered as shown in FIG. 6, the control circuit 9 determines “YES” in step B5, and then determines whether the specific facility (if there are a plurality of facilities, one of them) and the own vehicle. The linear distance is calculated (calculation means, step B8). Then, it is determined whether or not the distance between the specific facility and the own vehicle is smaller than or equal to the additional condition application radius, that is, whether or not the own vehicle is within the applicable area (step B9; application determining means). When it is not within the applicable area, then, for the other unspecified specific facilities, an operation of determining whether or not the own vehicle is within the applicable area for each specific facility is executed in the same manner as described above ("NO" in step B9). "YES in step B11, step B8, step B9). If the vehicle is not within the applicable area for any specific facility, the process returns to step B2 ("NO" in step B9, "NO" in step B11, step B2).
[0021]
After that, until the judgment time elapses, the vehicle information received this time matches the vehicle information received last time without continuing to enter the application area of any specific facility. A tracking warning is issued using the vehicle as a tracking vehicle, and the vehicle returns.
[0022]
As shown in FIG. 5, when the distance between the host vehicle and a certain specific facility is equal to or smaller than the additional determination radius, that is, when the host vehicle enters the applicable area (in the example of FIG. Is in the applicable area.), The control circuit 9 determines “YES” in step B9, and then determines whether or not the additional condition is satisfied (satisfaction determining means; step B10).
[0023]
If the additional condition is not satisfied for one specific facility ("NO" in step B10), the control circuit 9 measures the distance between the own vehicle and each of the other undetermined specific facilities. Then, the operation of determining whether the own vehicle is within the applicable area, and if the own vehicle is within the applicable area, repeats the operation of determining whether the additional condition is satisfied. If none of the additional conditions is satisfied, the control circuit 9 proceeds to step B2 (“NO” in step B10, “NO” in step B11, step B2).
[0024]
If there is a specific facility that satisfies the additional condition ("YES" in step B10), the control circuit 9 shifts to step B6, and the vehicle information received this time remains unchanged until the determination time elapses. When the state consistent with the information continues, a tracking warning is issued with the vehicle as the tracked vehicle, and the process returns.
[0025]
As described above, according to the present embodiment, a facility where the same vehicle is likely to become a subsequent vehicle by accident is defined as a specific facility, and when the same vehicle is within a predetermined distance from the specific facility, the time for detecting the same vehicle as a subsequent vehicle is the predetermined time. In addition to the continuation, when a condition such as turning a national road 20 times or more is further satisfied, the vehicle is determined to be a deliberately pursued vehicle, so that the possibility of a determination error can be sufficiently reduced.
[0026]
The present invention is not limited to the embodiment described above and shown in the drawings.
The position of the host vehicle may be obtained from only the GPS receiver.
The map data may be obtained from a map server by a mobile phone or the like. Similarly, the current position of the vehicle may be transmitted to a server by a mobile phone or the like from a signal received from a GPS artificial satellite, and the latitude and longitude calculated by the server may be acquired. The vehicle information of the following vehicle is not limited to the configuration obtained from the electronic license plate, but may be obtained via a wireless LAN or the Internet.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a diagram showing a detection state of an imperial vehicle. FIG. 3 is a flowchart for detecting a following vehicle. FIG. 4 is a flowchart for determining a tracking vehicle. 5 is a diagram showing a range to which an additional condition is added. [FIG. 6] A conceptual diagram showing a table of a specific facility, an additional condition application radius, and an additional condition.
In the figure, 1 is an electronic license plate (receiving means), 7 is a car navigation device, 9 is a control circuit (computing means, judging means), 10 is a position detector (position obtaining means), 11 is a map data input device (map) Data acquisition means), 12 is an external memory (additional condition storage means), 13 is a display device, and 15 is an audio output device.

Claims (3)

A vehicle provided with a receiving means for receiving information transmitted from another vehicle, wherein when the receiving means receives information transmitted from the same vehicle for a predetermined time, the vehicle is tracked by the vehicle; In the tracking vehicle search device that is determined to
Map data acquisition means for acquiring map data;
Position acquisition means for acquiring the position of the vehicle,
An additional condition storage unit that stores a predetermined specific facility, an additional condition of the specific facility, and an application area centered on the specific facility;
Calculating means for calculating the distance between the position of the vehicle acquired by the position acquiring means and the specific facility based on the map data;
When it is determined that the own vehicle is within the applicable area for the specific facility based on the distance calculated by the calculating means, whether or not the additional condition for the specific facility stored in the additional condition storage means is satisfied. When the own vehicle is in the applicable area, the state of receiving information from the same vehicle lasts for a preset time, and the determining means satisfies the additional condition. And determining the vehicle as a tracking vehicle. The tracking vehicle search device according to claim 1, wherein the additional condition is a number of times of turning at an intersection. The tracked vehicle search device according to claim 1, wherein the specific facility and / or the additional condition can be set by a user.

Images