JPS63282891A - Device for grasping vehicle position - Google Patents

Abstract

PURPOSE:To easily grasp the traveling track of a vehicle by storing the past vehicle positions in the vehicle side and displaying stored vehicle position information on the base station side. CONSTITUTION:On the vehicle side A, the position of the vehicle is detected by a vehicle position detecting means 1, the detected vehicle position information is stored in a vehicle traveling track storing means 2 and the identification (ID) information of the vehicle is stored in a vehicle ID information storing means 3. A vehicle side data communication means 4 transmits the vehicle position information and the vehicle ID information to the base station side B. On the base station side B, the vehicle position information and the vehicle ID information are received from the means 4 and sent to a display means 6 and the current position of the vehicle and its traveling track are displayed on a map displayed based on map information inputted from a map information storing means 7. Consequently, the track of the vehicle can be grasped on the base station side.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for determining the position of a vehicle at a base station, and more particularly to a device for determining the vehicle position that can determine the traveling trajectory of the vehicle.

(Prior art) As a vehicle position grasping device, the present applicant has previously proposed
164614.

In the above proposal, vehicle position information detected by a position detection means mounted on the vehicle is transmitted to a base station using a data communication line, and the base station uses the received vehicle position information as a base station. The location can now be determined.

(Problems to be Solved by the Invention) However, in the vehicle position grasping device proposed above, the current vehicle position or information on the vehicle position and traveling direction is transmitted to the base station. It is possible to know only the current position of the vehicle, or only the current position and the direction of travel F4.

For this reason, there is a drawback in that it is impossible to know how the vehicle traveled to reach its current location.

In addition, if the base station attempts to record one locus in order to eliminate this drawback, if the number of vehicles increases, the base station must constantly communicate with the vehicle. Not only will a huge amount of communication capacity be required, but the storage capacity of the base station will also be enormous, and vehicle management IT
There are 6 problems that +'l fullll becomes complicated.
child.

(Object of the Invention) The present invention has been made in view of the above-mentioned problems, and its purpose is to store past travel trajectories on the vehicle side, so that the base station side can store them as needed. An object of the present invention is to provide a vehicle position grasping device capable of grasping the trajectory of a vehicle.

(Means for Solving the Problems) In order to achieve the above object, a vehicle position grasping device according to the present invention is configured as shown in FIG.

On both sides of the tunnel, the position of the vehicle is detected by the vehicle position detection means 1, and the detected vehicle position information is stored in the vehicle travel trajectory storage means 2. Also, the vehicle identification information storage means 3 stores the vehicle position Identification information (vehicle ID information) is stored.

Furthermore, the vehicle side data communication means 4 is adapted to transmit the stored vehicle position information and vehicle identification information to the base station side B.

Further, on the base station side B, the base station side data communication means 5 receives vehicle position information and vehicle identification information from the vehicle side data communication means 4, and sends this information to the display means 6. At step 6, the current position and travel trajectory of the vehicle are displayed on a map displayed based on the map information input from the map information storage means 7.

(Function) Since the present invention is configured as described above, the traveling trajectory of the vehicle is displayed on the display means on the base station side with the past vehicle position information stored on the vehicle side below.

(Example) Hereinafter, the present invention will be explained based on the drawings.

FIG. 2 shows four configurations of a system to which the present invention is applied, in which (a) shows the vehicle side A, and FIG. 2 (b) shows the base station side B.

Reference numerals 11 and 21 in the figure are antennas on the vehicle side A and the base station side B, which are connected to the vehicle side wireless communication device 12 and the base station side wireless communication device 22, respectively. These radios 12.22
can be configured from an automatic telephone, MCA radio, or commercial radio.The vehicle radio 12 has only a transmitting function, and the base station radio 22 has a receiving function. It may also be a simple type with .

13 and 23 are modulation/demodulators (E-dems) that perform modulation and demodulation to match the carrier waves of the radio equipment 12 on both sides and the router 22 on the base station side in order to transmit signals;
4 and 24 are one-to-one adapters connected to the vehicle side and the base station side B, respectively, for performing communication control such as error correction.

15 is a control computer on the vehicle side A, which reads vehicle position information from the vehicle position detection device 16 at fixed time intervals, stores this information in a non-volatile RAM 17, and updates the information stored in this non-volatile RAM 17. Furthermore, when receiving a signal from the base station side B via the data adapter 14, or when receiving a transmission command input key 18,
It also has a function of reading the vehicle position information stored in the nonvolatile RAM 17 in accordance with the conditions of the transmission request and outputting it to the data adapter 14 when receiving a signal from the data adapter 14 .

Note that the vehicle position detection device 16 may be a combination of a geomagnetic azimuth sensor and a vehicle speed sensor, or a known vehicle position detection device that uses a signal from a sign post installed on the roadside.

Reference numeral 25 denotes a host computer provided on the base station side B, which receives signals from a database 26 that stores map information, vehicle identification information, vehicle identification data for identifying vehicle occupants, etc., and an operating keyboard 27. It is connected so that it can be inputted, and also connected so that it can be outputted to a color display 28 and a data adapter 24.

Note that the database 26 can use a known storage means such as a magnetic drum or a magnetic tape;
The color display 28 is not necessarily limited to color, but may be monochrome.

In d-3 of this embodiment with the above configuration, when it is desired to notify the position and traveling trajectory of the own vehicle from the vehicle side A to the base station side B, control can be performed by operating the transmission command input key 18. The computer 15 stores non-volatile vehicle position information detected by the vehicle position detection device 16.
The vehicle position information is read from the AM 17, outputted to the data adapter 14, and further transmitted to the base station B via the modem 13, vehicle side wireless communication device 12, and antenna 11.

On the other hand, since base station B constantly manages vehicles,
Since each device such as the color display 28 and the database 26 is in operation, it is always ready to receive transmissions from the vehicle A.

Furthermore, when the base station B needs to know the vehicle position of a specific vehicle, it inputs vehicle identification information and necessary transmission contents, which will be described later, from the operation keyboard 28 to the host 1 to the computer 25.

When the host computer 25''C transmits a vehicle position transmission request signal to the vehicle specified by the vehicle identification information via the data adapter 24, modem 23, base station side wireless communication 1tj, 122, and antenna 21, the vehicle side Then, the signal is transmitted to the antenna 11, the vehicle side radio] 2, and the modem 13.
and the data adapter 14 are input to the control computer 15, and the control computer 15 operates in the same manner as the above-mentioned transmission command input key 18 is operated to transmit vehicle position information from the vehicle side A to the base station side B. do.

Now, in the host computer 25, the data adapter 24
When receiving the vehicle position information received from the database 26, map information of the area matching the position difference information is read from the database 26,
The map, vehicle position, and travel trajectory are displayed on the color display 27 by combining with the vehicle position information.

At this time, it is preferable to display the vehicle position in different colors in order to distinguish between the current position and the past trajectory.

Additionally, if necessary, vehicle characteristic data such as driver and vehicle type can be read from the database 26 and displayed within the color display 27 or on a separate display.

Also, base station side BT: When managing multiple vehicles, only the current location from each vehicle is automatically transmitted at regular intervals, and the current location of each vehicle is always displayed on the map. It is also possible to display only the position and display the travel trajectory of a specific vehicle when necessary.

FIG. 3 shows data writing in the non-volatile RAM 17, and each address 1 to n contains t indicating the vehicle position a predetermined time from the current time, for example, how many hours or minutes ago, and the vehicle position. X and y indicating coordinates are stored. For example, if position coordinates are stored at time intervals, the th data indicates that the position was (xg, Vg) at a time before 1 - (g-1>xτ. This τ can be changed as needed. Therefore, by setting τ short, tl can be regarded as the current time, and in this case, the trajectory can be made closer to a continuous one.In addition, the number of memory addresses n The storage capacity of the media can be adjusted as needed.
2R can be determined.

Furthermore, data is updated by sequentially rewriting the data at address (t-1) with the data at address i when storing new data. Alternatively, only the data at address [) can be used as new data, and a pointer or the like can be used to recognize that it is the sixth data.

4 and 5 show the control computer 15 on the vehicle side A.
4 shows the processing procedure performed by the host computer 25 on the base station side B.
With reference to the internal clock of the control computer 15 of the vehicle A, each time τ elapses (step 101
), the current vehicle position coordinates of the vehicle position detection device 16 are read (step 102), and the data in the non-volatile RAM 17 is updated (step 03).

By the way, this routine is always executed by the backup power supply even if the main switch 1- of the vehicle is turned off. It is set to continue for ¥. This is because when a passenger such as a vehicle driver leaves the vehicle for meals, business, etc., it is necessary to accumulate the data even while the main switch of the vehicle is turned off. Also, in order to save the vehicle's power supply, it is possible to turn off the power to the vehicle position detection device when the vehicle switch is turned off, but at that time, the time τ The previous time is regarded as the current vehicle position and the data is updated.

In addition, if a transmission request is received from the base station side from the data adapter 14 or a transmission request is received from the transmission command input key 18, the routine shown in FIG. 4 is temporarily interrupted and the following 5.
Interrupt the diagram work.

In FIG. 5, when the transmission flag is on (step 11
1) Decipher the contents of the transmission request (step 112), and calculate the value 6 for the counter l-, the time interval k of the transmission request data, the data interval corresponding to this time interval k, and the number m of the transmission request data. settings (step 113). In addition, k
' can provide data corresponding to approximately the value of the required time interval if the time interval is small.

In step 114, at the start of transmission, vehicle identification information is read from the non-volatile RAM 17, outputted to the -i-ta adapter 14, and past position information is read gradually from the position information of the bond and current position, and transmission is repeated. (Step 1
15). Each time it is sent, Karantabi will be updated (
Step 116), when the counter i reaches the number m of requested data (step 117), the transmission flag is reset (step 118) and the process returns to the routine shown in FIG. 4 above.

Incidentally, when the base station side does not need all the data in the nonvolatile RAM 17, the contents of the transmission request in step 112 can be specified such as ``send n pieces of data at 1 hour intervals''. For example, if 60 pieces of data are requested at one-minute intervals, the current location and the location up to one hour ago will be sent.

If data is required at 10-minute intervals for the 60 minutes preceding the current time, and at 30-minute intervals for the previous 6 hours, m is increased in the specified variable, and steps 115 to 115
117 may be added. Additionally, by preparing several modes in advance and setting the data sampling method corresponding to each mode, input operations can be simplified.

According to the above embodiment, not only the current vehicle position but also past vehicle positions are stored on the vehicle side, and the base station arbitrarily sets the necessary position information and issues a transmission request. Because of this configuration, the base station side can easily retrieve the necessary position information of a specific vehicle, and has the advantage of being able to grasp the travel trajectory from the past vehicle position.

Also, base II! ! The station will check where the vehicle stopped, how long it stopped, and what kind of movement it made [[1]
Vehicle operations can be managed efficiently, and in the case of delivery vehicles such as home deliveries, it is possible to check whether the vehicle has already arrived at the delivery destination without relying on voice responses from the driver. Since it can be managed, it does not bother the driver, and in some cases, it has the advantage of being able to give appropriate instructions, such as changing the destination, based on the current travel trajectory.

In addition, in the case of systems that report vehicle emergencies,
When the vehicle must be found and rescued, even if the accuracy of detecting the current position of the vehicle is poor, the current position can be easily estimated based on the past travel trajectory, and the vehicle can be found quickly.

Furthermore, even if a cash transport vehicle is attacked by a robber and the vehicle is used as a getaway vehicle, by knowing the past travel trajectory, it is possible to easily predict in which direction the robber should lie in wait. There are various effects.

(Effects) Since the present invention is configured as described above, the vehicle side records not only the current vehicle position but also the past vehicle position, and the base station stores it. [U] Since both position information can be displayed, there is an effect that the travel trajectory of the vehicle can be easily grasped without increasing the storage capacity on the base station side.

[Brief explanation of the drawing]

FIG. 1 is a complaint correspondence diagram, and FIG. 2 is a block diagram showing a system of an embodiment of the vehicle position grasping device according to the present invention, in which (a) is a block diagram of the vehicle side, and (b) ) is a block diagram of the base station side, FIG. 3 is a configuration diagram of vehicle position information, FIG. 4 is a flowchart showing the processing procedure of the control computer on the vehicle side, and FIG. 5 is a flowchart showing the processing procedure of the host computer on the base station side. FIG. 1...Vehicle position detection means 2...Vehicle travel trajectory storage means 3...Vehicle identification information storage means 4...Vehicle side data communication means 5...Base station side data communication means 6...Display Means 7: Map information storage means Fig. 1 Fig. 2 Fig. 3 Fig. 4

Claims (1)

[Claims] (1) Vehicle position detection means for detecting the vehicle position; vehicle travel trajectory storage means for storing past vehicle position information on which the vehicle has traveled; vehicle identification information storage means for storing vehicle identification information; and the vehicle position. a vehicle-side data communication means for transmitting information and vehicle identification information to a base station; a base station-side data communication means for receiving vehicle position information and vehicle identification information transmitted from the vehicle-side data communication means; a map information storage means for storing map information of a driving area; and a display for combining the vehicle position information and vehicle identification information received by the base station side data communication means with the map information in the map information storage means and displaying the result on a display. A vehicle position grasping device characterized by comprising means.