JPH05189636A - Device for collecting traveling information of vehicle - Google Patents

Abstract

PURPOSE:To provide a traveling information collecting device to a vehicle for recording traveling road information having many branch points or the like in a sufficiently compressed data state. CONSTITUTION:Current position coordinates are found out by a current position detecting sensor 111 in a navigation system 11 and current position information is formed by a map data base 112 while collating the current position with a link number set up on a road map. The current position information based upon the link number is sent to a tachograph system 12 and stored in a specific area in a traveling information storing memory 122 as information set together with the link number. Such stored data are updated in each change of a link number and the information of a road on which a vehicle has traveled is collected as the continuation of unit information corresponding to respective link numbers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation system mounted on a vehicle such as an automobile, and more particularly to a vehicle traveling information collecting device for efficiently recording a traveling locus of the vehicle.

[0002]

2. Description of the Related Art When an automobile travels a long distance on an unknown land to reach a destination, the return route is often not clearly stored. In such a case, by recording the route when traveling on the outward route and reproducing the record so as to follow the reverse direction, it is possible to easily return to the departure point.

Many means for recording such a traveling path have been proposed in the past. For example, the traveling locus is recorded on the screen or in the working RAM of the electronic control unit, and this recording is appropriately reproduced and read. I am trying to do it.
In this case, if the travel locus is recorded in absolute coordinates, the amount of data inevitably becomes huge, and naturally it becomes impossible to record a long-distance travel locus. That is, the meaning of this type of information collecting device is halved.

As a means for solving such a problem,
A method of recording vector data in which a traveling locus is represented by an azimuth and a traveling distance was considered. However, even if such a data compression is attempted, the data can be relatively compressed when the road is a straight line, but the travel data cannot be sufficiently compressed when the road has a continuous curve.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and even in the case of a curved road having many branch points, the recording of the traveling locus is in a state in which the data is sufficiently compressed. It is an object of the present invention to provide a vehicle traveling information collecting device that can record the traveling trajectory including the return route information with sufficient accuracy.

[0006]

A traveling information collection device for a vehicle according to the present invention measures the current position coordinates of the vehicle, and based on map information in which a link number is set in advance for each road by a map matching means. A link number corresponding to the measured position coordinates is obtained, and the link number obtained by the map matching means is stored in the information storage means as one unit information together with the determination bit including the presence / absence of the traveling information collection operation. Then, each time the link number changes, one unit information corresponding to each link number is sequentially stored and set in the information storage means.

[0007]

In the vehicle travel information collecting device configured as described above, the coordinate data of the vehicle position and the link number set in the preset map information are associated with each other, and the travel data is provided in link number units. Will be recorded. And
One unit data is written and recorded in one storage area of the information storage means every time the link number changes as the vehicle travels, so that the entire traveling locus of the vehicle is recorded with a sufficiently small amount of data. become. Therefore,
If this recorded data is read from the reverse side and displayed in correspondence with the map information, the return route is clearly indicated as the vehicle travels.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the basic configuration of the navigation system 11, and the navigation system 11 transmits the current position information to the tachograph system 12.

The navigation system 11 is provided with a current position detection sensor 111 composed of GPS and the like and a map database 112 such as a CD. Further, the controller 113 performs map matching with the current position data and the map data. There is.

That is, the current position detection sensor 111 generates coordinate position data of the vehicle at present based on an artificial satellite or the like whose position is specified, and the coordinate position is matched with the map data. Identifies the road on which the exists. And this navigation system
From 11, the map-matched road data is output to the tachograph system 12 as current location information.

The tachograph system 12 is provided with a traveling information collecting sensor 121 composed of a vehicle speed sensor or the like, and constitutes a system for recording in a traveling information storage memory 122. The current position information supplied from the system 11 is recorded in time series to record the traveling locus.

Here, the road data recorded in the map database 112 of the navigation system 11 includes:
For example, as shown in FIG. 2, link numbers such as a, b, ... Are attached to each section from the branch point of the road to the branch point. Then, this link number is output as the current location information.

In this embodiment, in the road map shown in FIG. 2, the traveling locus from point A to point B via point B and from point D to point E is recorded. Then, the data representing the traveling locus of this road is compressed as shown in FIG. 3, for example.

FIG. 3 shows the data storage state of the data storage section of the travel information storage memory 122. The flag A is a flag for determining whether or not map matching for collecting travel data is performed. It is set to "0" when map matching is not performed, and is set to "1" at the start of data matching. Further, the flag B is a flag for determining midway entry and midway exit of the link (road) specified by the link number. Therefore, in areas # 1 and # 2 where map matching is not performed,
Both flags A and B are set to "0". However, even when map matching is not performed in this way, current position information is collected and absolute coordinate data of the vehicle current position is stored in these storage areas.

When the vehicle reaches the point A and data matching is started, the flag A is set as shown in the storage area # 3.
Both B and B are set to "1", and the link number "a" at the point A where the vehicle exists is stored. Next storage area #
In No. 4, when the flags A and B are both "1", the running at the link number "a" is recorded.

FIG. 4 shows the flow of processing for recording such running data. First, in step 201, the current position of the vehicle is measured, and its absolute coordinate data is output, and in step 202, the previous link is performed. Memory number PLNK
Write to and save. Further, in step 203, map matching corresponding to the map data is performed based on the coordinate data obtained in step 201, and the process proceeds to step 204.

In step 204, it is judged whether or not the link number is "0", and the link number is set to "0" in the state where map matching in which the road locus is not recorded is not performed. In the map matching state, the link number corresponding to the current vehicle position is set.

If it is determined in step 204 that the link number is not "0", that is, if it is determined that map matching is being performed, the process proceeds to step 205, and the link number stored in the memory PLNK and the map matching. It is determined whether or not the link numbers obtained by the above match, and if it is determined that they do not match, the process proceeds to step 206. In this step 206, it is judged whether or not the flag HW stored in the memory PHW is "1".

Here, the link number of the flag HW is "0".
It is set to "1" only when the state is converted into a specified number such as a or b, and is set to "0" in the normal state.

When it is determined in step 206 that the flag HW is "1", the process proceeds to step 207, in which the flags A and B are set to "11" and stored in the buffer BUF together with the traveling distance data. In step 208, buffer output is performed. When it is determined in step 206 that the flag HW is "0", the process proceeds from step 206 to step 208.

In step 209, the flag HW is stored in the memory PHW, and in the next step 210, it is determined whether or not the flag HW is "0". When it is determined that the flag HW is "0", the process proceeds to step 211, sets the flags A and B to "10", stores them in the buffer BUF together with the link number, and returns to step 201.

When it is determined in step 205 that the stored link number and the link number obtained by map matching match, the process proceeds to step 212, the mileage of the vehicle is updated, and then the process returns to step 201.

If it is determined in step 210 that the flag HW is "1", the process proceeds to step 213 where the flags A and B are set to "11" and stored in the buffer BUF together with the link number. Output at 204 and return to step 201.

In step 205, when map matching is not performed and it is determined that the link number is "0",
In step 215, it is determined whether the link number stored in the memory PLNK is "0". When the stored link number is "0", the routine proceeds to step 216, sets flags A and B to "00", stores the absolute coordinates X and Y at that time, and proceeds to step 214.

If it is determined in step 215 that the link number stored is not "0", the flow proceeds to step 217 to determine whether the flag HW stored in the memory PHW is "1". If the flag HW is determined to be "1", the process proceeds to step 207. If it is determined that the flag HW is "0", the flow advances to step 218 to set the flags A and B to "11" and store them in the buffer BUF. Then, in step 219, buffer output is performed, and the flow advances to step 207.

The flow of such processing will be described below in correspondence with a more specific traveling locus. First, considering the process from the side road to the point A of the link number a in FIG. 2, the current position coordinates are measured in step 201 of FIG. 4, and the previous link number is written in the memory PLNK in step 202. Is set. Then, in step 103, map matching is performed.

In this state, the link number has not been matched yet, so the link number is set to "0". Therefore, in step 204, the link number "0" is determined and the process proceeds to step 215. However, since the link number stored in the memory PLNK is also “0”, step 216
To "00" in the flags A and B, and the position coordinates X and Y are stored and set in the buffer BUF.
Continue to 214. Such a process is repeated to repeat # 1 in FIG.
# 2 data storage is performed.

Next, when the vehicle reaches the point A of the link number a, the link number "a" is discriminated in step 204, and the process proceeds to the next step 205 to write this link number "a" and the memory PLNK. Compare with the link number.
In this state, since the stored link number is "0", the process proceeds to step 206. In this step 206, since the flag HW is still "0", step 20
Proceed to 8. In this state, both flags A and B are "1".
Then, the data in the area # 3 in FIG. 3 is stored.

In step 209, the vehicle has the link number "0".
Since the area has entered the area of the link number "a" from the area of No. 2, the flag HW of "1" is written in PHW, and the flag HW is "1" at Step 210, so Step 21
Proceeding to 3, the data in the area # 3 is written into the buffer BUF.

In this way, the vehicle is linked from the point A to the link number a.
In the situation where you are traveling on the road of point B,
Since the link number "a" is set in the memory PLNK, the process proceeds from step 205 to step 212, and the distance from the approach point A is measured and updated. Then, the flags A and B are both set to "1", and the data of # 4 in FIG. 3 is stored.

In this way, when the vehicle passes the point B where the link number "a" changes to "c", the link number "a" stored so far in step 205 is changed to "c". Therefore, the process proceeds from step 205 to step 206. Since the link number is changed from "a" to "c", the flag HW is set to "0", and the flag HW of "0" is stored in the memory PHW in step 209.
Is written. In step 210, the flag HW is "0"
Therefore, in step 211, "flags A and B are set to" 1 ".
The data set to "0" and the ring number "c" are written in the area # 5 in FIG.

In this way, while the vehicle is traveling in the area of the link number c, the traveling distance is measured and updated and reaches the point C. When the vehicle reaches the point C, it further reaches the point D. In this state, the same processing as when the point B is reached is performed, and the data is recorded as in # 6 shown in FIG.

In this way, when the vehicle runs on the road with the link number e and leaves the road from point A, step 20
Link number "0" is now recognized in 4,
Proceed to step 215. In this step 215, the link number stored so far is recognized, but since this stored link number is "e", the routine proceeds to step 217. The flag HW stored in this step 217 is determined. Since this flag HW is set to "0", the routine proceeds to step 218. This step 21
In 8, the flag B is set to "1" in response to the departure from the road with the specified link number, and this is output in step 219 to record the data of # 7 in FIG.
In this case, the link number has already been set to "e".
From this step 219 proceed to step 207
Record the flag “11” and the mileage in BUF like # 8.

After leaving the road with the link number "e",
Since the link number is "0", step 20
From 4 to step 215, the link number of the memory PHW is confirmed, and if "0" is confirmed, the procedure proceeds to step 216 to set flags A and B to "1" respectively, and no map matching is performed thereafter. Record after # 9.

[0035]

As described above, according to the vehicle traveling information collecting apparatus of the present invention, the traveling data of this road is recorded in a sufficiently compressed state even in a road situation where there are many branch points and more curves. Therefore, the navigation of the return route to the forward route is effectively performed, and the road information in a wide range is collected by effectively utilizing the memory element having the limited capacity.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a basic configuration of a traveling information collection device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a road structure for collecting travel information.

FIG. 3 is a diagram illustrating a form of collected recording information.

FIG. 4 is a flowchart illustrating a flow of travel information collection processing.

[Explanation of symbols]

11 ... Navigation system, 111 ... Current location detection sensor, 112 ... Map database, 113 ... Controller, 12
… Tachograph system, 121… Sensors for collecting driving information,
122… Memory for storing driving information.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiji Kato 1-1-1, Showa-cho, Kariya city, Aichi prefecture Nihon Denso Co., Ltd.

Claims (1)

[Claims] 1. A position coordinate measuring means for measuring the current position coordinates of a vehicle, and map matching for obtaining a link number corresponding to the measured position coordinate based on map information in which a link number is set in advance for each road. Means and an information storage means for storing the link number obtained by the map matching means as one unit information together with a determination bit including the presence / absence of a traveling information collection operation, and each link changes for each change of the link number. A traveling information collection device for a vehicle, wherein one unit information corresponding to each number is sequentially stored and set in the information storage means.