JPH1178592A - Inter-vehicle distance warning device - Google Patents

Inter-vehicle distance warning device

Info

Publication number
JPH1178592A
JPH1178592A JP9248729A JP24872997A JPH1178592A JP H1178592 A JPH1178592 A JP H1178592A JP 9248729 A JP9248729 A JP 9248729A JP 24872997 A JP24872997 A JP 24872997A JP H1178592 A JPH1178592 A JP H1178592A
Authority
JP
Japan
Prior art keywords
inter
vehicle distance
distance
vehicle
alarm
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.)
Granted
Application number
JP9248729A
Other languages
Japanese (ja)
Other versions
JP3642662B2 (en
Inventor
Yasuo Tomioka
泰夫 冨岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UD Trucks Corp
Original Assignee
UD Trucks Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by UD Trucks Corp filed Critical UD Trucks Corp
Priority to JP24872997A priority Critical patent/JP3642662B2/en
Publication of JPH1178592A publication Critical patent/JPH1178592A/en
Application granted granted Critical
Publication of JP3642662B2 publication Critical patent/JP3642662B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To issue a warning slightly early at a position more apart than normal from a front vehicle or a front obstacle during a doze at the wheel for increasing safety against the doze at the wheel in this inter-vehicle distance warning device. SOLUTION: A driver's cab is provided with a means (a) outputting warning, a means (b) measuring the inter-vehicle distance to a front vehicle or a front obstacle, a means (c) setting a safety inter-vehicle distance to be compared with the measured distance, a means (d) controlling the means (a) to output the warning when the measured distance of the inter-vehicle distance is smaller than the safety inter-vehicle distance, a means (e) detecting a doze at the wheel, and a means (f) correcting the set value of the safety inter-vehicle distance in the increasing direction when the doze at the wheel is detected.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は車間距離警報装置
に関する。
The present invention relates to an inter-vehicle distance alarm device.

【0002】[0002]

【従来の技術】前方車両や前方障害物への過度の接近状
態を警報するため、前方の車間距離を計測し、その車間
距離が安全車間距離よりも小さくなると、運転室の警報
器を作動させるようにしたものがある。また、居眠り運
転に対する安全性を高めるため、車両の走行状態から居
眠り運転を検出すると、警報の発生により運転者を覚醒
させるようにしたものは知られている(特開平9ー11
772号公報)。
2. Description of the Related Art In order to warn of an excessive approach to a preceding vehicle or an obstacle in front, an inter-vehicle distance in front is measured, and when the inter-vehicle distance becomes smaller than a safe inter-vehicle distance, an alarm device in a cab is activated. There is something like that. Further, in order to enhance safety against dozing driving, there has been known a device in which when a dozing driving is detected from a running state of a vehicle, a driver is awakened by generating an alarm (Japanese Patent Laid-Open No. 9-111).
772).

【0003】[0003]

【発明が解決しようとする課題】前方車両や前方障害物
への過度の接近状態を警報する装置においては、車間距
離の計測値を安全車間距離の設定値と比較し、計測値が
設定値以下のときに過度の接近状態を判定するようにな
っている。居眠り運転時は、運転者が正常なときに較べ
ると、前方車両や前方障害物へ過度に接近する可能性も
非常に高くなる。居眠り警報装置も装備する場合は、居
眠り状態が判定されると、前方車両や前方障害物との車
間距離が安全車間距離の設定値よりも大きいときにも警
報が出力されるため、安全性にさほど問題を生じない
が、車間距離の警報装置だけの場合は、車間距離が安全
車間距離よりも小さくなってから、前方車両や前方障害
物への過度の接近状態を警報されても、運転者の覚醒が
遅れて適切な対応が取れない可能性が考えられる。
In a device for warning of an excessive approach to a preceding vehicle or an obstacle ahead, a measured value of the following distance is compared with a set value of a safe following distance, and the measured value is equal to or less than the set value. In the case of, an excessive approach state is determined. During the drowsiness driving, the possibility of the driver excessively approaching the vehicle ahead or the obstacle ahead is very high as compared with the case where the driver is normal. If a dozing alarm device is also provided, if a dozing state is determined, an alarm is output even when the inter-vehicle distance to the vehicle ahead or the obstacle ahead is larger than the set value of the safe inter-vehicle distance, so that safety is reduced. Although it does not cause much problem, in the case of only the inter-vehicle distance alarm device, even if the inter-vehicle distance becomes smaller than the safe inter-vehicle distance, even if the driver is warned of the excessive approach to the preceding vehicle or the obstacle in front, the driver is not warned. It is possible that the awakening of the person is delayed and an appropriate response cannot be taken.

【0004】この発明はこのような問題点を有効に解決
する手段の提供を目的とする。
An object of the present invention is to provide means for effectively solving such a problem.

【0005】[0005]

【課題を解決するための手段】第1の発明では、図4の
ように運転室に警報を出力する手段aと、前方車両や前
方障害物に対する車間距離を計測する手段bと、この計
測距離と比較する安全車間距離を設定する手段cと、車
間距離の計測距離が安全車間距離よりも小さいときに警
報を作動させるように制御する手段dと、を備える車間
距離警報装置において、居眠り運転を検出する手段e
と、居眠り運転の検出時に安全車間距離の設定値を増方
向へ補正する手段fと、を設ける。
According to a first aspect of the present invention, there is provided a means for outputting a warning to a driver's cab as shown in FIG. 4, a means for measuring an inter-vehicle distance with respect to a preceding vehicle or an obstacle ahead, and a measuring distance. A means c for setting a safe inter-vehicle distance to be compared with, and means d for controlling to activate an alarm when the measured distance of the inter-vehicle distance is smaller than the safe inter-vehicle distance. Detecting means e
And means f for correcting the set value of the safe inter-vehicle distance in the increasing direction when a drowsy driving is detected.

【0006】第2の発明では、第1の発明において、図
4のように安全車間距離の補正値に基づく警報の制御状
態を居眠りモードとして表示する手段gを備える。
According to a second aspect, in the first aspect, as shown in FIG. 4, there is provided means g for displaying a control state of an alarm based on the correction value of the safe inter-vehicle distance as a dozing mode.

【0007】第3の発明では、第1の発明における補正
手段fは、図5のように居眠り運転の検出時にフラグを
オンする手段hと、フラグセット時に改めてタイマをス
タートさせる手段i、タイマが所定時間の経過をカウン
トしたときにフラグをオフする手段jと、フラグのオン
ーオフを判定する手段kと、フラグがオンのときに安全
車間距離の補正を行う手段mと、フラグがオフのときに
安全車間距離の補正値を設定値に復帰させる手段nと、
を備える。
In the third invention, the correction means f in the first invention comprises means h for turning on a flag when a drowsy driving is detected as shown in FIG. 5, means i for starting a timer again when the flag is set, and timer Means j for turning off the flag when the predetermined time has elapsed, means k for determining whether the flag is on or off, means m for correcting the safe inter-vehicle distance when the flag is on, and means m for correcting the safe inter-vehicle distance when the flag is off. Means n for returning the safety inter-vehicle distance correction value to the set value;
Is provided.

【0008】[0008]

【発明の効果】第1の発明では、居眠り運転時は安全車
間距離の設定値が増方向へ補正されるため、前方車両や
前方障害物との車間距離が通常よりも離れた位置から警
報が出力される。そのため、運転者の覚醒が遅れて適切
な対応が取れないような事態を未然に防止できる。
According to the first aspect of the present invention, since the set value of the safety inter-vehicle distance is corrected in the increasing direction during the drowsiness driving, an alarm is issued from a position where the inter-vehicle distance to the preceding vehicle or the obstacle in front is farther than usual. Is output. Therefore, it is possible to prevent a situation in which the driver's awakening is delayed and an appropriate response cannot be taken.

【0009】第2の発明では、居眠り検出時に車間距離
の計測値と比較される安全車間距離の設定値を増方向へ
補正することにより、警報は通常時よりも早めに出力さ
れるが、安全車間距離の補正値に基づく警報の制御状態
が居眠りモードとして表示されるため、運転者が警報の
出力タイミングの変化に戸惑うのを避けられる。
In the second invention, the alarm is output earlier than usual by correcting the set value of the safety inter-vehicle distance, which is compared with the measured value of the inter-vehicle distance when the drowsiness is detected, in the increasing direction. Since the alarm control state based on the inter-vehicle distance correction value is displayed as the dozing mode, the driver can be prevented from being puzzled by a change in the output timing of the alarm.

【0010】第3の発明では、居眠り運転の検出がオフ
しても、タイマが所定時間の経過をカウントするまでフ
ラグのオンを保持するため、居眠り運転の断続に伴って
安全車間距離が補正値ともとの設定値との間で頻繁に変
化するのを防止できる。
In the third invention, even if the detection of the drowsy driving is turned off, the flag is kept on until the timer counts the elapse of the predetermined time. Frequent changes between the original set value and the original set value can be prevented.

【0011】[0011]

【発明の実施の形態】図1はこの発明の実施形態を表す
ものであり、運転室のインストルメントパネル1に警報
器3および警報モード表示インジケータ2が設けられ
る。警報器2としてこの例では、音量調節可能なブザー
を採用する。車両の前部にレーザレーダまたはミリ波方
式の距離計測装置5が配置される。距離計測装置5はビ
ームの照射部と感知部とを備えるものであり、前方へ照
射するビームが反射して感知されるまでの所要時間や周
波数,位相の偏移をもとに前方車両や前方障害物との車
間距離を計測する。10は車速を検出する車速センサを
表す。
FIG. 1 shows an embodiment of the present invention. An alarm panel 3 and an alarm mode display indicator 2 are provided on an instrument panel 1 in a cab. In this example, a buzzer whose volume can be adjusted is employed as the alarm 2. A laser radar or millimeter-wave distance measuring device 5 is arranged at the front of the vehicle. The distance measuring device 5 includes a beam irradiating unit and a sensing unit. The distance measuring device 5 determines the time required for the beam irradiating forward to be reflected and sensed, the frequency, and the phase shift based on the deviation of the vehicle ahead and the vehicle ahead. Measure the distance between the vehicle and the obstacle. Reference numeral 10 denotes a vehicle speed sensor that detects a vehicle speed.

【0012】運転室の警報器3および警報モード表示イ
ンジケータ4を制御するメインコントローラ6が設けら
れる。メインコントローラ6は警報制御部7と安全車間
距離の設定部8およびその補正部9と、からなる。警報
制御部7は、安全車間距離の設定値と距離計測装置5に
よる車間距離の計測値に基づいて、計測値が設定値以下
のときに警報器3を作動させるように制御する。また、
車間距離の単位時間あたりの変化量を前方車両や前方障
害物との相対速度として計算する。
A main controller 6 for controlling the alarm 3 and the alarm mode display indicator 4 in the cab is provided. The main controller 6 includes an alarm control unit 7, a safety inter-vehicle distance setting unit 8, and a correction unit 9 therefor. The alarm control unit 7 controls the alarm 3 based on the set value of the safe inter-vehicle distance and the measured value of the inter-vehicle distance by the distance measuring device 5 when the measured value is equal to or less than the set value. Also,
The amount of change in the inter-vehicle distance per unit time is calculated as a relative speed with respect to a preceding vehicle or a preceding obstacle.

【0013】安全車間距離の設定部8は、車速センサ1
0の検出値と車間距離の変化量(相対速度の計算値)に
応じた安全車間距離をメモリのマップデータから設定す
る。安全車間距離の設定補正部9は、後述する居眠り検
出時に車間距離の計測値と比較される安全車間距離の設
定値を増方向へ補正する。メモリに居眠り検出時に使わ
れる補正係数α(1<α)が格納される。
The safe inter-vehicle distance setting unit 8 includes a vehicle speed sensor 1
A safe inter-vehicle distance corresponding to the detected value of 0 and the amount of change in the inter-vehicle distance (calculated value of the relative speed) is set from the map data in the memory. The safe inter-vehicle distance setting correction unit 9 corrects the set value of the safe inter-vehicle distance, which is compared with the measured value of the inter-vehicle distance when a drowsiness detection described later is performed, in the increasing direction. A correction coefficient α (1 <α) used at the time of detecting a drowsiness is stored in the memory.

【0014】メインコントローラ6は、警報器3の音量
を居眠り検出時に通常レベルよりも大出力に切り替える
機能と、同じく居眠り検出時に安全車間距離の補正値に
基づく警報の制御状態を居眠りモードとして警報モード
表示インジケータ4に表示させる機能と、を備える。ま
た、安全車間距離の範囲において、1次警報と2次警報
とが設定され、車間距離の計測値と比較される安全車間
距離の設定値を1次警報用から2次警報用へ切り替える
ための変換係数β(0<β<1)がメモリに格納され
る。
The main controller 6 has a function of switching the volume of the alarm device 3 to an output larger than the normal level when a drowsiness is detected, and a warning mode based on a correction value of the safety inter-vehicle distance when the drowsiness is detected. And a function to be displayed on the display indicator 4. Further, a primary alarm and a secondary alarm are set in the range of the safe inter-vehicle distance, and the set value of the safe inter-vehicle distance to be compared with the measured value of the inter-vehicle distance is switched from the primary alarm to the secondary alarm. The conversion coefficient β (0 <β <1) is stored in the memory.

【0015】運転室のインストルメントパネル1に運転
者の顔を撮影するCCDカメラ2が設置され、その画像
(データ)はサブコントローラ12に入力される。サブ
コントローラ12は、CCDカメラ2の画像処理部13
と、運転者の覚醒度を推定する居眠り検出部14と、か
ら構成される。画像処理部12はCCDカメラ2の画像
から目を精度よく抽出するための特殊な画像フィルタを
備えるものであり、カメラ2で撮影された画像と顔の縦
方向の長さが短い黒領域(目など)を除去した画像との
差を出力する。その出力画像は2値化され、目などを抽
出する2値画像になる。
A CCD camera 2 for photographing the driver's face is installed on an instrument panel 1 in the driver's cab, and its image (data) is input to a sub-controller 12. The sub-controller 12 is an image processing unit 13 of the CCD camera 2.
And a drowsiness detector 14 for estimating the degree of awakening of the driver. The image processing unit 12 includes a special image filter for extracting eyes from the image of the CCD camera 2 with high accuracy. Output the difference between the image and the original image. The output image is binarized and becomes a binary image for extracting eyes and the like.

【0016】居眠り検出部13は2値画像をもとに目尻
の傾きの変化から瞬きを検出する。そして、一定時間あ
たりの閉じ目(目尻の傾きが開き目の傾きよりも緩やか
になる)時間を計測し、その計測時間を覚醒度の閾値と
比較して閾値を越えるときに覚醒度の低下(居眠り状
態)を判定する。そして、メインコントローラ6におけ
る、安全車間距離の設定補正部9へ居眠り状態の検出信
号を出力する。
The drowsiness detector 13 detects blinking from a change in the inclination of the corner of the eye based on the binary image. Then, the closed eye (the inclination of the outer corner of the eye becomes gentler than the inclination of the open eye) time per fixed time is measured, and the measured time is compared with the threshold of the arousal level. (Drowsiness state) is determined. Then, the main controller 6 outputs a dozing detection signal to the safety inter-vehicle distance setting correction unit 9.

【0017】図2はメインコントローラ6で行われる制
御内容を説明するフローチャートであり、制御は所定周
期t0で繰り返し実行される。ステップ1においては、
制御の開始時にフラグFLG=0、タイマカウント(時
間)t=0、音量切り替えを通常モード、にそれぞれ設
定する。
[0017] Figure 2 is a flow chart for explaining the contents of control performed by the main controller 6, the control is repeatedly executed at a predetermined period t 0. In step 1,
At the start of the control, the flag FLG = 0, the timer count (time) t = 0, and the volume switching are set to the normal mode.

【0018】ステップ2,ステップ3では、距離計測装
置5の反射時間から前方車両や前方障害物との距離Si
を計測する。ステップ4では距離計測装置5で計測する
車間距離Siからその単位時間あたりの変化量△V=
(Si−Si-1)/t0 -1を前方車両や前方障害物との相
対速度として計算する。Siは制御周期t0毎に計測され
る車間距離の今回の計測値、Si-1は同じく前回の計測
値である。ステップ5では、車速センサ10の検出値と
相対速度△Vに基づいて、メモリのマップデータからそ
のときの安全車間距離Aを設定する。
In steps 2 and 3, the distance S i from the vehicle ahead or the obstacle ahead is calculated from the reflection time of the distance measuring device 5.
Is measured. Step 4 In the distance measuring apparatus of the per unit time from the inter-vehicle distance S i be measured with 5 variation △ V =
(S i −S i−1 ) / t 0 −1 is calculated as a relative speed with respect to a preceding vehicle or an obstacle ahead. S i is the current measurement value of the inter-vehicle distance measured at each control cycle t 0 , and S i-1 is the previous measurement value. In step 5, based on the detection value of the vehicle speed sensor 10 and the relative speed ΔV, the safe inter-vehicle distance A at that time is set from the map data in the memory.

【0019】ステップ6ではフラグFLG=1かどうか
を判定する。フラグFLG=1でないときは、居眠り運
転状態でない(運転者が正常)としてステップ7へ進
み、車間距離の計測値Siを1次警報用の安全車間距離
の設定値Aと比較する。Si<Aでないときはへリタ
ーンする。Si<Aのときはステップ8へ進み、車間距
離の計測値Siを2次警報用の安全車間距離β・Aと比
較する。Si<β・Aでないときは、ステップ9で1次
警報を出力する一方、Si<β・Aのときは、ステップ
10で2次警報を出力する。これらの警報は通常音量で
出力される。
At step 6, it is determined whether or not the flag FLG = 1. When the flag FLG is not 1, it is determined that the vehicle is not in a drowsy driving state (the driver is normal), and the process proceeds to step 7, and the measured value S i of the following distance is compared with the set value A of the safe inter-vehicle distance for the primary warning. When S i <A, the process returns to step S. If S i <A, the routine proceeds to step 8, where the measured value S i of the following distance is compared with the safe warning distance β · A for the secondary warning. If not S i <β · A, a primary alarm is output in step 9, whereas if S i <β · A, a secondary alarm is output in step 10. These alerts are output at normal volume.

【0020】ステップ6の判定がyes(フラグFLG
=1)のときは、ステップ11へ飛び、タイマカウント
tを所定時間T1に達するかどうかを判定する。t>T1
のときは、ステップ12〜ステップ14でフラグFLG
=0、タイマカウントt=0にする一方、警報の音量を
通常モードに切り替えるとともに警報モード表示インジ
ケータ4をオフしてから、ステップ7へ移行する。ステ
ップ11の判定がno(t>T1でない)のときは、ス
テップ15へ飛び、警報モード表示インジケータ4をオ
ンさせる(居眠りモード表示)。ステップ16で安全車
間距離の設定値Aを補正値A´=α・Aに変換する。
If the determination in step 6 is yes (flag FLG
= 1) when the jump to Step 11 to determine whether the timer count t reaches the predetermined time T 1. t> T 1
, The flag FLG is set in steps 12 to 14.
= 0 and the timer count t = 0, the alarm volume is switched to the normal mode, and the alarm mode display indicator 4 is turned off. When the determination in step 11 is no in (t> is not a T 1), it jumps to step 15 to turn on the alarm mode display indicator 4 (doze mode display). In step 16, the set value A of the safe inter-vehicle distance is converted into a correction value A '= α · A.

【0021】ステップ17では、車間距離の計測値Si
を1次警報用の安全車間距離の補正値A´と比較する。
i<A´でないときはへリターンする。Si<A´の
ときはステップ18へ進み、車間距離の計測値Siを2
次警報用の安全車間距離β・A´と比較する。Si<β
・A´でないときは、ステップ19,ステップ20で音
量切り替えを居眠りモード(大音量)に切り替えて1次
警報を出力する一方、Si<β・A´のときは、ステッ
プ21,ステップ22で音量切り替えを居眠りモードに
切り替えて2次警報を出力する。
In step 17, the measured value S i of the following distance is used.
Is compared with a safe inter-vehicle distance correction value A ′ for the primary warning.
When S i <A ′ is not satisfied, the process returns to step S. When S i <A ′, the process proceeds to step 18 and the measured value S i of the following distance is set to 2
This is compared with the safety inter-vehicle distance β · A ′ for the next warning. S i
If it is not A ', the volume switching is switched to the dozing mode (loud volume) in steps 19 and 20 to output a primary alarm, while if S i <β · A', then in steps 21 and 22 The volume switching is switched to the dozing mode, and a secondary alarm is output.

【0022】図3はタイマカウントtに関する制御内容
のフローチャートであり、サブコントローラから居眠り
の検出信号を受けると、この割り込み処理は起動する。
ステップ1ではフラグFLG=1にする。ステップ2で
はタイマカウントt=0かどうかを判定する。t≠0で
ないときは、ステップ3へ進み、タイマカウントをスタ
ートさせる。t≠0のときは、ステップ4へ飛び、タイ
マカウントt=0にしてから、ステップ3へ移行する。
FIG. 3 is a flow chart of the control contents relating to the timer count t. When a dozing detection signal is received from the sub-controller, this interrupt processing is started.
In step 1, the flag FLG = 1 is set. In step 2, it is determined whether or not the timer count t = 0. If t ≠ 0, the process proceeds to step 3 to start timer counting. If t ≠ 0, the process jumps to step 4 to set the timer count t = 0, and then shifts to step 3.

【0023】このような構成により、居眠り運転時は、
安全車間距離の設定値Aが増方向へ補正されるため、前
方車両や前方障害物との車間距離が通常よりも離れた位
置から警報が出力される。そのため、運転者の覚醒が遅
れて適切な対応が取れないような事態を未然に防止でき
る。また、居眠り検出時の警報は大音量で出力するた
め、運転者を居眠り状態から覚醒させる効果も大きい。
With such a configuration, during drowsy driving,
Since the set value A of the safe inter-vehicle distance is corrected in the increasing direction, an alarm is output from a position where the inter-vehicle distance with the preceding vehicle or the obstacle ahead is farther than usual. Therefore, it is possible to prevent a situation in which the driver's awakening is delayed and an appropriate response cannot be taken. Further, since the alarm at the time of detecting the drowsiness is output at a high volume, the effect of awakening the driver from the drowsiness state is great.

【0024】前方車両や前方障害物との車間距離に対す
る警報の出力タイミングに通常時と居眠り検出時との間
で差異を生じるが、警報モード表示インジケータ4で安
全車間距離の補正値A´に基づく警報の制御状態が居眠
りモードとして表示されるため、運警報の出力タイミン
グの変化に運転者が戸惑うのを防止できる。また、図2
のステップ11〜ステップ14および図3のステップ1
〜ステップ4により、サブコントローラ12の居眠り検
出がオフしても、所定時間にわたってフラグFLG=1
を保持するため、居眠り状態の断続に伴って安全車間距
離が補正値A´と設定値Aとの間で頻繁に変化するのを
防止できる。
The output timing of the warning for the distance between the vehicle ahead and the obstacle in front may differ between the normal time and the time of the detection of falling asleep, but the warning mode display indicator 4 is based on the correction value A 'of the safe distance between vehicles. Since the control state of the alarm is displayed as the dozing mode, it is possible to prevent the driver from being puzzled by a change in the output timing of the luck alarm. FIG.
Steps 11 to 14 of FIG. 3 and Step 1 of FIG.
Through step 4, even if the dozing detection of the sub-controller 12 is turned off, the flag FLG = 1 for a predetermined period of time.
Is maintained, it is possible to prevent the safe inter-vehicle distance from frequently changing between the correction value A ′ and the set value A due to intermittent dozing.

【0025】この発明の要旨は、居眠り検出時に車間距
離の計測値Siと比較される安全車間距離の設定値Aを
増方向へ補正することにより、警報を早めに出力させる
ところにあり、居眠り検出方法や警報方法などについて
は、別の構成を採用しても構わない。たとえば、居眠り
検出方法として、路面の車線(白線)をカメラで監視す
るとともに車両の操舵角を検出し、これらの信号から路
面の車線を横切る走行パターン(蛇行運転)を捕らえる
ことにより、居眠り運転を判定するように構成すること
も考えられる。警報方法については、単なるブザー音で
なくメッセージをアナウンスするようにしてもよい。こ
れらに運転者の覚醒を促す臭気の発生手段を組み合わせ
ることも考えられる。
The gist of the present invention is to output a warning earlier by correcting the set value A of the safe inter-vehicle distance, which is compared with the measured value S i of the inter-vehicle distance when the drowsiness is detected, in the increasing direction. Another configuration may be adopted for the detection method, the alarm method, and the like. For example, as a dozing detection method, a dozing driving is monitored by monitoring a lane (white line) on the road surface with a camera, detecting a steering angle of the vehicle, and capturing a running pattern (meandering driving) crossing the lane on the road surface from these signals. It is also conceivable to configure so as to make the determination. As for the warning method, a message may be announced instead of a simple buzzer sound. It is also conceivable to combine these with odor generating means that encourages the driver to wake up.

【図面の簡単な説明】[Brief description of the drawings]

【図1】この発明の実施形態を説明する概要図である。FIG. 1 is a schematic diagram illustrating an embodiment of the present invention.

【図2】同じくメインコントローラの制御内容を説明す
るフローチャートである。
FIG. 2 is a flowchart illustrating the control contents of a main controller.

【図3】同じくメインコントローラの制御内容を説明す
るフローチャートである。
FIG. 3 is a flowchart illustrating the control contents of a main controller.

【図4】この発明のクレーム対応図である。FIG. 4 is a diagram corresponding to claims of the present invention.

【図5】この発明のクレーム対応図である。FIG. 5 is a diagram corresponding to claims of the present invention.

【符号の説明】[Explanation of symbols]

2 CCDカメラ 3 警報器 4 警報モード表示インジケータ 5 距離計測装置 6 メインコントローラ 7 警報制御部 8 安全車間距離の設定部 9 安全車間距離の設定補正部 10 車速センサ 12 サブコントローラ 13 画像処理部 14 居眠り検出部 2 CCD camera 3 Alarm 4 Alarm mode display indicator 5 Distance measuring device 6 Main controller 7 Alarm control unit 8 Safety inter-vehicle distance setting unit 9 Safe inter-vehicle distance setting correction unit 10 Vehicle speed sensor 12 Sub-controller 13 Image processing unit 14 Drowsiness detection Department

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】運転室に警報を出力する手段と、前方車両
や前方障害物に対する車間距離を計測する手段と、この
計測距離と比較する安全車間距離を設定する手段と、車
間距離の計測距離が安全車間距離よりも小さいときに警
報を作動させるように制御する手段と、を備える車間距
離警報装置において、居眠り運転を検出する手段と、居
眠り運転の検出時に安全車間距離の設定値を増方向へ補
正する手段と、を設けたことを特徴とする車間距離警報
装置。
1. Means for outputting an alarm to the driver's cab, means for measuring the following distance between a vehicle ahead and an obstacle ahead, means for setting a safe following distance to be compared with the measured distance, and measuring distance between the vehicles Means for controlling an alarm to be activated when the distance is smaller than the safe inter-vehicle distance, means for detecting dozing driving, and increasing the set value of the safe inter-vehicle distance when detecting dozing driving. And a means for correcting the distance between the vehicles.
【請求項2】安全車間距離の補正値に基づく警報の制御
状態を居眠りモードとして表示する手段を備えたことを
特徴とする請求項1に記載の車間距離警報装置。
2. The inter-vehicle distance alarm device according to claim 1, further comprising means for displaying a control state of the alarm based on the correction value of the safe inter-vehicle distance as a dozing mode.
【請求項3】補正手段は、居眠り運転の検出時にフラグ
をオンする手段と、フラグセット時に改めてタイマをス
タートさせる手段、タイマが所定時間の経過をカウント
したときにフラグをオフする手段と、フラグのオンーオ
フを判定する手段と、フラグがオンのときに安全車間距
離の補正を行う手段と、フラグがオフのときに安全車間
距離の補正値を設定値に復帰させる手段と、を備えたこ
とを特徴とする請求項1に記載の車間距離警報装置。
3. A means for turning on a flag when a drowsy driving is detected; a means for starting a timer again when the flag is set; a means for turning off the flag when the timer counts the elapse of a predetermined time; Means for determining whether the vehicle is on or off, means for correcting the safe inter-vehicle distance when the flag is on, and means for returning the safe inter-vehicle distance correction value to the set value when the flag is off. The inter-vehicle distance alarm device according to claim 1, wherein
JP24872997A 1997-09-12 1997-09-12 Inter-vehicle distance alarm device Expired - Fee Related JP3642662B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24872997A JP3642662B2 (en) 1997-09-12 1997-09-12 Inter-vehicle distance alarm device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24872997A JP3642662B2 (en) 1997-09-12 1997-09-12 Inter-vehicle distance alarm device

Publications (2)

Publication Number Publication Date
JPH1178592A true JPH1178592A (en) 1999-03-23
JP3642662B2 JP3642662B2 (en) 2005-04-27

Family

ID=17182490

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24872997A Expired - Fee Related JP3642662B2 (en) 1997-09-12 1997-09-12 Inter-vehicle distance alarm device

Country Status (1)

Country Link
JP (1) JP3642662B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002169582A (en) * 2000-11-29 2002-06-14 Canon Inc Voice synthesizing device and its control method, and computer-readable memory
JP2002254941A (en) * 2001-02-28 2002-09-11 Tokai Rika Co Ltd Monitoring system for shift lever
JP2005343317A (en) * 2004-06-03 2005-12-15 Nissan Motor Co Ltd Vehicular driving operation auxiliary device, and vehicle having the same
US8537000B2 (en) 2007-01-24 2013-09-17 Toyota Jidosha Kabushiki Kaisha Anti-drowsing device and anti-drowsing method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002169582A (en) * 2000-11-29 2002-06-14 Canon Inc Voice synthesizing device and its control method, and computer-readable memory
JP2002254941A (en) * 2001-02-28 2002-09-11 Tokai Rika Co Ltd Monitoring system for shift lever
JP2005343317A (en) * 2004-06-03 2005-12-15 Nissan Motor Co Ltd Vehicular driving operation auxiliary device, and vehicle having the same
JP4543760B2 (en) * 2004-06-03 2010-09-15 日産自動車株式会社 VEHICLE DRIVE OPERATION ASSISTANCE DEVICE AND VEHICLE HAVING VEHICLE DRIVE OPERATION ASSISTANCE DEVICE
US8537000B2 (en) 2007-01-24 2013-09-17 Toyota Jidosha Kabushiki Kaisha Anti-drowsing device and anti-drowsing method

Also Published As

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