JPH0518198Y2 - - Google Patents
Info
- Publication number
- JPH0518198Y2 JPH0518198Y2 JP1988031048U JP3104888U JPH0518198Y2 JP H0518198 Y2 JPH0518198 Y2 JP H0518198Y2 JP 1988031048 U JP1988031048 U JP 1988031048U JP 3104888 U JP3104888 U JP 3104888U JP H0518198 Y2 JPH0518198 Y2 JP H0518198Y2
- Authority
- JP
- Japan
- Prior art keywords
- steering
- drowsy
- alarm
- driving
- detecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 8
- 230000004913 activation Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 206010041349 Somnolence Diseases 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は車両の居眠り運転検出装置の改良に
関する。[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to an improvement of a drowsy driving detection device for a vehicle.
（従来の技術）
自動車の運転する時の居眠り運転検出装置とし
て、居眠り運転時に特徴的なステアリング操作パ
ターン（ハンドル操作が一時的に停止する無操舵
状態及び無操舵後のハッとしたハンドルの急な切
返し操作など）をマイクロコンピユータなどに記
憶させておき、運転者がそれと合致する操作を行
つたときに警報を発するようにしたものが知られ
ている（特公昭62−30943号、同62−30944号公
報）。(Prior art) A device for detecting drowsy driving when driving a car detects steering operation patterns that are characteristic of drowsy driving (no-steering conditions in which steering wheel operation temporarily stops, and abrupt steering movements after no steering). It is known that a vehicle is stored in a microcomputer, etc., and a warning is issued when the driver performs a corresponding operation (Special Publications No. 62-30943, No. 62-30944). Publication No.).
（考案が解決しようとする課題）
このような方法は有効であるが、ステアリング
操作の個人差は意外に大きく、また路面の轍、タ
イヤからの振動など外乱的要素により誤警報を発
する可能性が高いという問題点があつた。つまり
従来方法では居眠り運転を適確に判定することが
難しかつた。(Problem that the invention aims to solve) Although this method is effective, there are surprisingly large individual differences in steering operation, and there is a possibility of false alarms being issued due to external factors such as road ruts and vibrations from tires. The problem was that it was expensive. In other words, it has been difficult to accurately determine drowsy driving with conventional methods.
この考案はこのような問題点を解決することを
目的とする。 This invention aims to solve these problems.
（課題を解決するための手段）
そのため、この考案は第１図で示すように、操
舵角を検出する手段と、操舵力を検出する手段
と、これらの検出信号に基づいて操舵角変化が所
定値以上で操舵力が規定値以下の状態が所定時間
以上継続したときに居眠り運転と判定する居眠り
状態判別手段と、この判定信号に基づいて警報手
段の作動を制御する警報駆動手段を備えたもので
ある。(Means for solving the problem) Therefore, as shown in FIG. The vehicle is equipped with a drowsy state determining means that determines that driving is drowsy when the steering force is equal to or greater than a specified value and less than a specified value continues for a predetermined period of time, and an alarm drive means that controls the operation of an alarm means based on this determination signal. It is.
（作用）
運転者が居眠り運転を始めると、操舵角変化が
路面の轍など外乱的要素による振れ幅以上に増加
し、かつ運転者の意思的な操舵力が低下する。こ
の場合操舵角変化が所定値以上で、操舵力が規定
値以下の状態が所定時間以上継続したときに、居
眠り運転と判定して警報を発するようにしたの
で、ステアリング操作の個人差、路面の轍など外
乱的要素に惑わされることなく、居眠り運転を正
確に判定して警報することができる。(Function) When the driver begins to fall asleep while driving, the steering angle change increases beyond the amplitude caused by disturbance factors such as ruts on the road surface, and the driver's intentional steering force decreases. In this case, when the change in steering angle is greater than a predetermined value and the steering force is less than a predetermined value for a predetermined period of time, it is determined that the driving is drowsy and a warning is issued. It is possible to accurately determine drowsy driving and issue a warning without being confused by disturbance factors such as ruts.
（実施例）
第２図において、１はステアリングの回動角度
を検出する操舵角センサ、２は同じくステアリン
グの回動トルクを検出する操舵力センサ、３はこ
れらの検出信号に基づいて居眠り運転を検出した
ときにランプ、ブザー、音声等の警報手段４を作
動させるマイクロコンピユータ（CPU５、ROM
６、RAM７、入出力ポート８とから構成され
る）を示す。(Example) In Fig. 2, 1 is a steering angle sensor that detects the turning angle of the steering wheel, 2 is a steering force sensor that also detects the turning torque of the steering wheel, and 3 is a sensor that detects drowsy driving based on these detection signals. A microcomputer (CPU 5, ROM
6, RAM 7, and input/output port 8).
このマイクロコンピユータ３の制御動作の一例
を第３図にしたがつて説明する。まず、ステツプ
１０にて居眠り運転検出開始のための所定の前提
条件（走行環境が単調で居眠り運転しやすくなる
所定車速以上の定速走行時）が成立すると、ステ
ツプ１１〜１３にて操舵角センサ１と操舵力セン
サ２からの信号に基づいて演算を行ない、居眠り
運転の発生を判定したときに警報手段４の作動信
号を出力する。第４図は第３図のステツプ１２で
行なわれる居眠り運転の判定動作を示すフローチ
ヤートで、ステツプ２０〜２３にて操舵角センサ
１の検出信号から求めた操舵角変化が路面の轍な
ど外乱的要素による振れ幅（例えば2°）以上で、
かつ同じく操舵角センサ１の検出信号から求めた
操舵周波数が所定値、つまり居眠り運転に特徴的
なステアリング操作により例えば0.3Hz以下であ
れば、さらに操舵力センサ２の検出信号に基づい
てステアリング回動トルクが規定値、例えば0.15
Kg・Ｍ以下で、運転者の意思的な操舵力が低下し
たことを確認したときに警報タイマフラグを１に
セツトする。なお、上記の判定条件以外では基本
的にステツプ２４で警報タイマフラグを０にリセ
ツトするのであるが、操舵角変化と操舵周波数の
条件の少なくとも一方がNOの場合でもステアリ
ング回動トルクが所定値以下のときには居眠り運
転の可能性があるため、このような場合、ステツ
プ２３で警報タイマフラグを１にセツトするよう
にステツプ２５，２６が付加される。 An example of the control operation of this microcomputer 3 will be explained with reference to FIG. First, in step 10, when a predetermined precondition for starting drowsy driving detection is satisfied (during constant speed driving at a predetermined vehicle speed or higher, where the driving environment is monotonous and drowsiness is likely to occur), the steering angle sensor is detected in steps 11 to 13. 1 and the signal from the steering force sensor 2, and outputs an activation signal for the alarm means 4 when it is determined that drowsy driving has occurred. FIG. 4 is a flowchart showing the operation for determining drowsy driving performed in step 12 of FIG. If the deviation due to the element is greater than (e.g. 2°),
Similarly, if the steering frequency obtained from the detection signal of the steering angle sensor 1 is a predetermined value, that is, 0.3 Hz or less due to steering operation characteristic of drowsy driving, the steering is further rotated based on the detection signal of the steering force sensor 2. Torque is specified value, e.g. 0.15
When it is confirmed that the driver's intentional steering force is lower than Kg・M, the warning timer flag is set to 1. Note that, except for the above judgment conditions, the alarm timer flag is basically reset to 0 in step 24, but even if at least one of the steering angle change and steering frequency conditions is NO, the steering rotation torque is less than the predetermined value. In such a case, there is a possibility that the driver falls asleep at the wheel, so steps 25 and 26 are added so that the alarm timer flag is set to 1 in step 23 in such a case.
さらに、第５図は第３図のステツプ１３で行な
われる警報動作を示すフローチヤートで、３０〜
３３にて警報タイマフラグのセツトにより警報タ
イマを起動し、その所定時間（例えば３秒）の積
算時に警報手段４の作動信号を出力する。なお、
３４〜３７は警報タイマフラグのリセツトに伴い
起動中の警報タイマを停止させるための制御動作
を示し、警報タイマフラグのリセツト時に警報タ
イマが積算中であれば、停止用のタイマを起動
し、その所定時間（例えば0.2秒）の積算時に警
報タイマの積算内容をクリアにする。 Furthermore, FIG. 5 is a flowchart showing the alarm operation performed in step 13 of FIG.
At step 33, the alarm timer is activated by setting the alarm timer flag, and an activation signal for the alarm means 4 is output when the predetermined time (for example, 3 seconds) has been accumulated. In addition,
34 to 37 indicate control operations for stopping the alarm timer that is running when the alarm timer flag is reset.If the alarm timer is integrating when the alarm timer flag is reset, the timer for stopping is started and the Clears the accumulated content of the alarm timer when a predetermined time (for example, 0.2 seconds) has been accumulated.
このように、居眠り運転に特徴的なステアリン
グ操作の検出に加えて、運転者の意思的な操舵力
の低下を居眠り運転の判定条件として採用したの
で、ステアリング操作の個人差、路面の轍など外
乱的要素に惑わされることなく、居眠り運転を正
確に判定して警報することができる。 In this way, in addition to detecting the steering operation characteristic of drowsy driving, we adopted a decrease in the driver's intentional steering force as a condition for determining drowsy driving, so we are able to detect individual differences in steering operation and disturbances such as road ruts. It is possible to accurately determine drowsy driving and issue a warning without being confused by other factors.
（考案の効果）
以上要するにこの考案によれば、操舵角を検出
する手段と、操舵力を検出する手段と、これらの
検出信号に基づいて操舵角変化が所定値以上で操
舵力が規定値以下の状態が所定時間以上継続した
ときに居眠り運転と判定する居眠り状態判別手段
と、この判定信号に基づいて警報手段の作動を制
御する警報駆動手段を設けたので、ステアリング
操作の個人差、路面の轍などに外乱的要素に惑わ
されることなく、居眠り運転を正確に警報するこ
とができる。つまり誤警報頻度の低下が図れると
いう効果が得られる。(Effect of the invention) In summary, according to this invention, there is a means for detecting a steering angle, a means for detecting a steering force, and a means for detecting a steering angle when a change in the steering angle is greater than a predetermined value and the steering force is less than a predetermined value based on these detection signals. We have provided a drowsy state determination means that determines that driving is drowsy when this state continues for a predetermined period of time, and an alarm drive means that controls the operation of the alarm means based on this determination signal. It is possible to accurately warn of drowsy driving without being confused by disturbance factors such as ruts. In other words, the effect of reducing the frequency of false alarms can be obtained.
第１図はこの考案のクレーム対応図、第２図は
この考案の実施例を示すブロツク図、第３図〜第
５図はマイクロコンピユータで行なわれる制御動
作の一例を示すフローチヤートである。
１……操舵角センサ、２……操舵力センサ、３
……マイクロコンピユータ、４……警報装置。
FIG. 1 is a diagram corresponding to claims of this invention, FIG. 2 is a block diagram showing an embodiment of this invention, and FIGS. 3 to 5 are flowcharts showing an example of control operations performed by a microcomputer. 1... Steering angle sensor, 2... Steering force sensor, 3
...Microcomputer, 4...Alarm device.
Claims (1)
段と、これらの検出信号に基づいて操舵角変化が
所定値以上で操舵力が規定値以下の状態が所定時
間以上継続したときに居眠り運転と判定する居眠
り状態判別手段と、この判定信号に基づいて警報
手段の作動を制御する警報駆動手段を設けたこと
を特徴とする居眠り運転検出装置。 A means for detecting a steering angle, a means for detecting a steering force, and a means for detecting drowsy driving when a state in which a change in steering angle is greater than a predetermined value and a steering force is less than a predetermined value continues for a predetermined time or more based on these detection signals. A drowsy driving detection device comprising a drowsy state determining means for determining a drowsy state, and an alarm drive means for controlling the operation of an alarm means based on the determination signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988031048U JPH0518198Y2 (en) | 1988-03-09 | 1988-03-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988031048U JPH0518198Y2 (en) | 1988-03-09 | 1988-03-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01134522U JPH01134522U (en) | 1989-09-13 |
| JPH0518198Y2 true JPH0518198Y2 (en) | 1993-05-14 |
Family
ID=31256627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988031048U Expired - Lifetime JPH0518198Y2 (en) | 1988-03-09 | 1988-03-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0518198Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010515960A (en) * | 2007-01-09 | 2010-05-13 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Method and apparatus for detecting driver's fatigue state using rotational moment detection sensor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6076426A (en) * | 1983-09-30 | 1985-04-30 | Nissan Motor Co Ltd | Dozing at wheel detecting device |
| JPS60135330A (en) * | 1983-12-22 | 1985-07-18 | Aisin Seiki Co Ltd | Detector of holding state of steering wheel |
-
1988
- 1988-03-09 JP JP1988031048U patent/JPH0518198Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6076426A (en) * | 1983-09-30 | 1985-04-30 | Nissan Motor Co Ltd | Dozing at wheel detecting device |
| JPS60135330A (en) * | 1983-12-22 | 1985-07-18 | Aisin Seiki Co Ltd | Detector of holding state of steering wheel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010515960A (en) * | 2007-01-09 | 2010-05-13 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Method and apparatus for detecting driver's fatigue state using rotational moment detection sensor |
| JP2014013571A (en) * | 2007-01-09 | 2014-01-23 | Robert Bosch Gmbh | Method and device for detecting fatigue state of driver using steering angle detection sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01134522U (en) | 1989-09-13 |
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