JP2005121382A - Running state notify system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system for alarming regarding the running condition at an appropriate timing by taking the driver's running experience into consideration, while in the conventional system, it alarms to the running condition corresponding to the driver's driving characteristics, therefore the timing of the alarm display is fixed by the driver's driving characteristics. <P>SOLUTION: Skillfulness of the driver is calculated by memorizing the running road with the day, time passed thereon based on the on board map information. While, based on the present position, running speed, and the map information, the future position, recommended speed are calculated and displayed to the driver wherein the display condition such as timing of display are set by referring to the skillfulness. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a system that advises driving conditions without giving an excessive nuisance to a driver.

The following document is disclosed as a system for performing a warning with less trouble by calculating a driving characteristic value of a driver, accumulating and storing it for each situation, and giving a warning only when the degree of accumulation is large.

JP 2002-127780 A

However, even in this system, for example, a road having the same radius of curvature, the speed at which the vehicle can turn is known on a road that is always running. However, in the case of an unknown road, there are many cases where it is uncertain whether or not the car can turn at that speed. In this way, by adopting a configuration that can appropriately advise according to the familiarity of the road that is running, advise the recommended driving conditions only when necessary, and advice that does not give the driver troublesomeness more than necessary The purpose was to realize the system.

  The present invention has been made to achieve the above object. In the present invention, the means for recording and retrieving past driving history on the road being traveled, and the familiarity indicating the degree of experience regarding the road link which is information including the contents of the driving history record retrieving means and the current traveling and the route related thereto. A degree calculation means, a map information storage means including changes in various driving conditions such as speed regulation, a change in the number of lanes, and a means for estimating a future position with reference to the current driving position, vehicle speed and the contents of the map information storage means When calculating and presenting the recommended traveling speed in consideration of these outputs, the notification operation is controlled in consideration of the driving history of the driver. In other words, if there is no traffic experience on the road, or if the traffic experience is low, the driving condition is notified as an alarm, and if it is judged that the road is sufficiently familiar, such an alarm is not issued. The configuration.

  According to the present invention, since an appropriate advice level is selected according to the driving experience of the road, there is no troublesome system that can give advice or warning of driving conditions despite being familiar with the road. It can be configured.

(Embodiment 1)
As a first embodiment of the present invention, the operation of the present invention when a vehicle travels on a curve will be described with reference to the system configuration diagram of FIG. The current position detection means 1 calculates latitude and longitude information of the position of the host vehicle at the current time point. For this purpose, a technique widely used in navigation devices, such as using GPS signals from artificial satellites, can be used. The travel speed detection means 2 calculates the travel speed of the host vehicle at the current time. The map information storage means 3 stores map information in the vicinity of the host vehicle, and this can also use a technique widely used in navigation devices. Since the first embodiment describes the case where the vehicle travels on a curve, the map information described here stores information related to the recommended speed for each curve in addition to general map information. In addition to curves, for example, near points where the speed limit changes, near points where the slope of the slope changes, near intersections where there is a pause, near intersections or signals with signals, highway interchanges or junctions, fees Generally, such as near a place, near a point where the number of lanes or road width changes, near a point where a specific zone such as a school zone or residential zone changes, near a pedestrian crossing, near a construction section, near a road surface change point If the recommended speed is stored for each point where the speed may change during traveling, the present invention can be used in combination. Also, the recommended speed information here is not necessarily stored as a numerical value of the speed of a certain section, but is a point sequence data composed of points arranged along the radius of curvature, the curvature of the curve, Therefore, the data may be stored in such a data format.

  Moreover, the external environment recognition means 4 detects the generation | occurrence | production state of rain, snow, fog, etc., and the distinction of day and night, for example. In order to detect these, it may be detected by using a wiper operation signal, or information may be obtained by means of FM broadcasting such as traffic information and weather information, road-to-vehicle communication, or the like. In order to distinguish day and night, information on the illuminance sensor may be used, or information on lighting / non-lighting of the light may be used.

  The future position estimation means 5 estimates the travel position after the time Tf, for example, 5 seconds later. This relationship will be described with reference to FIG. Assuming that the vehicle position at the current time T is P1 and the vehicle speed is V1, the predicted position P2 after the time Tf is estimated to be a point that has traveled a distance of Tf × V1 along the road. For example, the road is referred to as a road link with a number of road links that are numbered currently running, for example, a road that is currently running, and the above is a distance of Tf × V1. It means that the vehicle has advanced, and when it exceeds the nodes that connect the road links to each other during this time, the direction with the smallest angle change from the traveling direction is selected.

  The recommended speed calculation means 6 in FIG. 1 calculates the recommended speed at the future position after the time Tf predicted by the future position estimation means 5. As described above, the information stored in the map information storage unit 3 may be read and used, or may be calculated from information related to the road stored in the map information storage unit 3.

  The driving history storage means 8 records driving history information that records at least the date and time and the number of times this road link has been traveled in the past for each road link constituting the road data. This is used as information when the calculation means 9 calculates the familiarity of the road.

  The accumulation history calculation unit 7 calculates information to be stored in the operation history storage unit 8. When calculating the history, the data may be categorized and accumulated for each environment such as weather, day and night, or daytime data in fine weather may be selectively accumulated. The familiarity calculating means 9 calculates a familiarity F for the road link. Examples of accumulated history and familiarity will be described later.

  The display condition calculation means 10 calculates a display condition for the display means 13 based on the recommended speed calculated by the recommended speed calculation means 6 and the familiarity F calculated by the familiarity degree calculation means 9, and the display condition storage means 11 Output to. The display condition storage unit 11 is a temporary storage unit, and specifically uses a memory.

The display control means 12 reads the contents stored in the display condition storage means 11 at regular time intervals and outputs a control signal formed in the display means 13.
The display means 13 is a display device such as a monitor or a head-up display (HUD). In the present embodiment, a display device using visual information is described as an example, but information presentation using sound in the audible range, presentation method using body sensations such as seat vibration, pedal reaction force, or These may be used in combination. It should be noted that the display operation control is executed for items such as whether or not to execute display, display position on the screen, display speed, and presentation timing.

Next, details of the control will be described with reference to the flowchart of FIG.
After the engine is started, the process is started from step S1001. In step S1002, the road link number that was running immediately before the engine stopped is read from the storage area and stored in the road link number address Ltemp in the memory.
In step S1003, the position P1 and the vehicle speed V1 at the current time are calculated.
In step S1005, the running road link number L1 is calculated on the navigation map data corresponding to the position P1.

In step S1007, the road link number Ltemp that was running immediately before is compared with the road link number L1 that is currently running. If the vehicle has moved and the running road link number has changed ("NO" in step S1007), the process proceeds to step S1009. On the other hand, when the vehicle is stopped and when the vehicle is moving but the road link number is not changing ("YES" in step S1007), the process proceeds to step S1011.
In step S1009, the history information of the road link that was traveling immediately before is updated to the latest data. Specifically, as will be described later in Table 4, the latest travel date is stored in the storage area.
In step S1011, the predicted position P2 after time Tf is calculated as described in FIG.

In step S1013, a recommended speed VR at the predicted position P2 is calculated. A method of calculating the recommended speed VR will be described later.
In step S1015, the familiarity F at the predicted position P2 is calculated. A method for calculating the familiarity F will also be described later.
In step S1017, the display condition calculation means 10 in FIG. 1 calculates the speed VD displayed on the display means 13 based on the recommended speed VR and the familiarity F. A method of calculating VD will also be described later.
In step S1019, as in step S1017, the display condition calculation unit 10 calculates the position and timing to be displayed on the display unit 13. A method of calculating the display position and timing will also be described later.
In step S1021, the output result calculated in steps S1017 and S1019 is temporarily stored in the display condition storage unit 11.
In step S1023, L1 calculated in step S1005 is temporarily stored.

Next, the flow of the first interrupt process for updating the display contents will be described with reference to FIG.
After the engine is started, the process is started from step S2001.

In step S2003, the display condition stored in the display condition storage unit 11 is read at regular time intervals in the display control unit 12 in FIG. The certain time here is a time interval determined for each display means 13.
In step S2005, the display control means 12 determines whether or not the display means 13 is driven and controlled. When the display content is to be updated (“YES”), the process proceeds to step S2007, and the display unit 13 is driven and controlled. If the display content is not updated (“NO”), the process returns to step S2003 and the process is repeated again.

Next, the flow of the second interrupt process for updating the display contents will be described with reference to FIG.
After the engine is started, the process is started from step S3001.
In step S3003, the process is repeated until just before the engine is stopped ("NO"). If engine stop is detected ("YES"), the process proceeds to step S3005.
In step S3005, the latest history data is written to the current road link. Specifically, the latest history data is written to the latest road link number Ltemp stored temporarily.

In step S3006, in preparation for the next engine start, the data written in the road link number Ltemp is stored in the storage area of the display condition storage means 11, and the process is terminated.

The operation of the familiarity calculating means 9 is executed as follows.
First, the case where the familiarity F is calculated from the number of days elapsed since the previous traffic will be described. The familiarity calculating means 9 in FIG. 1 is assumed to store the table shown in Table 1 in advance.

ここで運転履歴格納手段８は簡単のため、ある道路リンクの前回通行した日を記憶しているものとすると、精通度算出手段９はこの前回通行日からの経過時間を算出し、これを表１に示すテーブルと比較し精通度Ｆを算出する。
次に過去複数回の通行記録を用いて、その通行記録からの経過時間より精通度Ｆを算出する場合について説明する。精通度算出手段９は予め表２及び表３に示すテーブルを記憶しているものとする。

Here, since the operation history storage means 8 is simple, if it is assumed that the previous passage date of a certain road link is stored, the familiarity calculation means 9 calculates the elapsed time from this previous passage date, and represents this. The familiarity F is calculated in comparison with the table shown in FIG.
Next, a case will be described in which the familiarity F is calculated from the elapsed time from the passage record using the past plural passage records. The familiarity calculating means 9 is assumed to store the tables shown in Tables 2 and 3 in advance.

簡単のため、運転履歴格納手段８に、ある道路リンクの前回通行した日を記録した例を表４に示す。

For the sake of simplicity, Table 4 shows an example in which the driving history storage means 8 records the date of the last passage of a certain road link.

表４において新しいデータが記録される際は、データ番号５の前回通行日データが破棄された上で、データ番号４の前回通行日データはデータ番号５へ、データ番号３のデータはデータ番号４へ順次コピー（データ番号１,２も同様）した上で、最新のデータはデータ番号１に書き込まれているものとする。精通度算出手段９はこの表４に記憶された過去５回の通行日より表２の重み付け係数を用いて各データの頻度係数を算出する。例えば、現在を２００３年６月３０日とした場合の例を表５に示す。頻度係数積算値は、データ番号１から５の頻度係数の和として算出する。

When new data is recorded in Table 4, the previous passage date data of data number 5 is discarded, the previous passage date data of data number 4 is changed to data number 5, and the data of data number 3 is data number 4 It is assumed that the latest data is written in data number 1 after copying sequentially (data numbers 1 and 2 are the same). The familiarity calculating means 9 calculates the frequency coefficient of each data from the past five passage dates stored in Table 4 using the weighting coefficients in Table 2. For example, Table 5 shows an example where the current date is June 30, 2003. The frequency coefficient integrated value is calculated as the sum of the frequency coefficients of data numbers 1 to 5.

この頻度係数積算値を表３と比較し精通度Ｆを算出する。

The frequency coefficient integrated value is compared with Table 3, and the familiarity F is calculated.

  The operation of the display condition calculation unit 10 will be described. The display condition calculation means 10 has a table shown in Table 6 for display conditions corresponding to the familiarity F in advance, and uses this Table 6 to determine display presence / absence, display position, display speed, and display timing. .

すなわち、将来の走行位置Ｐ2が精通度Ｆ1であった場合、その道についての運転経験は全く無いか、その道についての情報について運転者は忘却している状態と推定できる。このような場合は高い注意レベルを喚起するため、推奨速度表示をモニタ及びヘッドアップディスプレイ（ＨＵＤ）に常時表示するものとする。またその際の表示速度については、ステップＳ1017の様に、その地点における推奨速度Ｖ2と精通度Ｆに応じた補正速度Ｖ1’を用いてかなり低めな安全速度を表示すると共に、時間的に余裕をもたせるためにカーブのかなり手前から表示を開始するものとする。すなわちカーブ開始地点到着予想時刻をＴr秒後とすると、Ｔ＋Ｔr−Ｔh1(0<Ｔh1)秒後より表示を開始する。ここで、Ｔは現在時刻であり、Ｔhは精通度Ｆに応じた表示開始時間の補正時間である（例えば精通度Ｆが低い場合は表示開始時間を速めに設定する）。

That is, when the future travel position P2 is the familiarity F1, it can be presumed that there is no driving experience on the road or that the driver has forgotten the information on the road. In such a case, a recommended speed display is always displayed on the monitor and the head-up display (HUD) in order to call a high attention level. As for the display speed at that time, as shown in step S1017, the recommended speed V2 at that point and the corrected speed V1 ′ corresponding to the familiarity F are used to display a considerably low safety speed and allow time. It is assumed that the display starts considerably before the curve in order to give it. That is, assuming that the predicted curve start point arrival time is Tr seconds later, the display is started after T + Tr-Th1 (0 <Th1) seconds. Here, T is the current time, and Th is a display start time correction time corresponding to the familiarity F (for example, when the familiarity F is low, the display start time is set earlier).

  If the future driving position P2 is familiarity F2, it can be estimated that the driver may have forgotten the information about the road, although he has driving experience on the road. In such a case, a recommended speed display is always displayed on the monitor and the HUD in order to call a higher attention level. In addition, regarding the display speed at that time, it is assumed that a lower safe speed is displayed using the recommended speed V2 and the correction speed V2 '(V2' <V1 '), and the display is started from before the curve. That is, assuming that the predicted curve start point arrival time is Tr seconds later, the display starts after T + Tr−Th2 (0 <Th2 <Th1) seconds.

  If the future driving position P2 is familiarity F3, it can be estimated that there is a driving experience on the road and that it may be remembered a little. In such a case, the recommended speed display is always displayed on the monitor. Further, regarding the display speed at that time, it is assumed that a lower safe speed is displayed using the recommended speed V2 and the correction speed V3 '(V3' <V2 '), and the display is started from before the curve.

  If the future driving position P2 is familiarity F4, it can be estimated that the road is quite familiar. In such a case, the recommended speed display is always displayed on the monitor. As for the display speed at that time, the recommended speed V2 is displayed as the safe speed, and the display is started from before the curve.

If the future driving position P2 has a familiarity F5, it can be estimated that the road is very familiar. In such a case, the recommended speed display is not always displayed. However, the safe speed V2 is displayed on the monitor when it is determined that there is a possibility of danger if the vehicle enters the curve as it is. In other words, the display timing starts when T + Tr−Th3 (0 <Th3 <Th2) seconds, assuming that the predicted curve start point arrival time is after Tr seconds.
(Second Embodiment)
Next, a second embodiment of the present invention will be described.
The operation of the display condition calculation means 10 will be described with respect to display when visibility is poor such as bad weather such as rain and snow, fog, and the like. Normally, the display condition calculation means 10 has a table shown in Table 7 as a display condition corresponding to the familiarity F in advance. However, when bad weather, poor visibility, or the like is detected, it always corresponds to the familiarity F1. Operate as a display under conditions In this way, extremely safe operation is possible even under adverse conditions.

  The same applies to the case where information indicating that the slip ratio of the road surface has deteriorated is obtained or detected.

  The present invention is not limited to the above embodiments, and any combination thereof may be implemented.

The block diagram which shows the apparatus structure in this invention. The schematic diagram which shows the traveling vehicle positional relationship for demonstrating operation | movement of this apparatus. The flowchart which shows the control action in this system. The flowchart which shows an example of the interruption process for display content update. The flowchart which shows another example of the interruption process for display content update.

Explanation of symbols

1: Current position detection means 2: Traveling speed detection means 3: Map information storage means 4: External environment recognition means 5: Future position estimation means 6: Recommended speed calculation means 7: Accumulation history calculation means 8: Driving history storage means 9: Familiarity calculation means 10: Display condition calculation means 11: Display condition storage means 12: Display control means 13: Display means

Claims (6)

In a system that calculates the recommended travel speed of the road on which the vehicle is going to travel and displays it to the driver,
Means for recording and searching past driving history in a road link of a driving route including a road being driven;
Familiarity degree calculating means for obtaining a degree of familiarity of the driver with respect to the road from the recorded contents of the means for recording and retrieving the past driving history;
Map information storage means including roads that are running,
Future position estimating means for estimating a future position after a predetermined time from the current traveling position, vehicle speed, and map information stored in the map information storing means;
Recommended speed calculating means for obtaining a recommended traveling speed at the estimated future position using at least the output of the future position estimating means, the map information stored in the map information storing means, and the output of the familiarity calculating means; ,
And a means for controlling the operation of the display using the driving history information when the recommended traveling speed is displayed to the driver. In the driving situation notification system according to claim 1,
The display operation control is at least one of presence / absence of display, display position, display speed, and presentation timing. In the driving situation notification system shown in claims 1 and 2,
The driving history information system is characterized in that the driving history information is at least one of a past driving number and a driving time of a road section including a road link being driven. In the driving situation notification system shown in claims 1 and 2,
The travel condition notification system characterized in that the degree of familiarity with respect to a road link being traveled is calculated using an elapsed time from the previous travel time of a road section including the road link being traveled. In the driving situation notification system shown in claims 1 and 2,
A travel condition notification system characterized in that the degree of familiarity with respect to a road link during travel is calculated using the elapsed time from each of a plurality of past travel times of a road section including the road link during travel. In the driving situation notification system according to claim 1 to claim 5,
A traveling state notification system, wherein at least one of a weather factor and a visibility factor is deteriorated by exceeding a predetermined value, a correction is made to the timing of display operation control.

Images