JP2000016115A - Alarm device for doze in vehicle - Google Patents
Alarm device for doze in vehicleInfo
- Publication number
- JP2000016115A JP2000016115A JP10189007A JP18900798A JP2000016115A JP 2000016115 A JP2000016115 A JP 2000016115A JP 10189007 A JP10189007 A JP 10189007A JP 18900798 A JP18900798 A JP 18900798A JP 2000016115 A JP2000016115 A JP 2000016115A
- Authority
- JP
- Japan
- Prior art keywords
- awakening
- driver
- lower limit
- initial
- degree
- 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
Links
Landscapes
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
- Emergency Alarm Devices (AREA)
- Traffic Control Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、車両の運転中に運
転者が居眠りしたときに警報を発する装置に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for issuing an alarm when a driver falls asleep while driving a vehicle.
【０００２】[0002]
【従来の技術】従来、この種の装置として、心拍の拍間
時間の呼吸性変動等の出現が期待される心拍周波数帯域
が分散比−心拍周波数特性の通過域に含まれるようにサ
ンプル数を定め、呼吸性変動等の出現が期待される周波
数帯域における覚醒時の心拍の拍間時間の分散に基づい
て覚醒度の低下許容限界に対応する心拍の拍間時間の分
散の判定値を設定し、サンプル数について心拍の拍間時
間の分散を演算して心拍の拍間時間の呼吸性変動等を抽
出し、更に判定値と現在の心拍の拍間時間の呼吸性変動
等とを比較して現在の覚醒度が許容限界を下回ったか否
かを判定するように構成された覚醒度判定方法が開示さ
れている（特開平３−２７２７４５号）。2. Description of the Related Art Conventionally, as this type of apparatus, the number of samples is set so that a heart rate frequency band in which respiratory fluctuations in the interbeat time of a heartbeat are expected to be included in the passband of the variance ratio-heartbeat frequency characteristic. The determination value of the variance of the interbeat time of the heartbeat corresponding to the permissible lowering limit of the arousal level is set based on the variance of the interbeat time of the awake heartbeat in the frequency band where the appearance of respiratory fluctuations is expected. By calculating the variance of the interbeat time of the heartbeat with respect to the number of samples, extracting the respiratory variation and the like of the interbeat time of the heartbeat, and further comparing the determination value with the respiratory variation and the like of the current heartbeat A wakefulness determination method configured to determine whether the current wakefulness has fallen below an allowable limit has been disclosed (Japanese Unexamined Patent Publication No. 3-272745).
【０００３】このように構成された覚醒度判定方法で
は、現実の呼吸性変動等に対する追従性が向上し、例え
ば車両走行時における運転者の覚醒度低下をより迅速か
つ敏感に検出できる。また覚醒度の低下比により呼吸性
変動等を判定するため、呼吸性変動等の周波数における
運転者の個人差の影響を排除できるようになっている。[0003] With the arousal level determination method configured as described above, the ability to follow actual respiratory fluctuations and the like is improved, and, for example, a decrease in the arousal level of the driver while the vehicle is running can be detected more quickly and more sensitively. In addition, since the respiratory variation and the like are determined based on the reduction ratio of the arousal level, the influence of the individual difference of the driver on the frequency of the respiratory variation and the like can be eliminated.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記従来の特
開平３−２７２７４５号公報に示された覚醒度判定方法
では、システムが一旦オンした後に設定された初期値
（初期覚醒レベル）はシステムがオフになるまで再初期
化（更新）されないため、上記初期値が覚醒度が低下傾
向の状態で設定されると、運転中に居眠りしそうな場合
でも覚醒度が低下していると判定されない恐れがあっ
た。本発明の目的は、初期覚醒下限値をより覚醒してい
る方（覚醒度が高い方）に更新することにより、運転者
の覚醒度の低下を確実に判定できる居眠り警報装置を提
供することにある。However, in the awakening degree determination method disclosed in the above-mentioned conventional Japanese Patent Laid-Open Publication No. 3-272745, the initial value (initial awakening level) set after the system is once turned on is determined by the system. Since it is not re-initialized (updated) until it is turned off, if the initial value is set in a state where the arousal level tends to decrease, there is a possibility that it is not determined that the arousal level is decreasing even if it is likely to fall asleep during driving. there were. An object of the present invention is to provide a dozing alarm device that can reliably determine a decrease in a driver's arousal level by updating the initial arousal lower limit value to a more awake one (a higher arousal level). is there.
【０００５】[0005]
【課題を解決するための手段】請求項１に係る発明は、
図１及び図２に示すように、車両始動時の運転者１１の
初期覚醒度及び運転継続時の運転者１１の運転時覚醒度
をそれぞれ検出する覚醒度検出手段１２と、運転者１１
に警報を発して運転者１１を覚醒させる覚醒手段１３
と、初期覚醒度に基づいて運転者１１の初期覚醒下限値
を算出し運転時覚醒度が初期覚醒下限値より低下したと
きに覚醒手段１３を作動させる覚醒度判定手段１４とを
備えた居眠り警報装置の改良である。その特徴ある構成
は、車両の速度を検出する車速センサ１８と、車両のド
アの開閉を検出するドアセンサ１９とを備え、車速セン
サ１８が車速ゼロの状態を検出しドアセンサ１９がドア
開の状態を検出した後に車両が再発進して車速センサ１
８が車速ゼロ以外の状態を検出したときの再発進時の運
転者１１の覚醒度を中期覚醒度とし、覚醒度判定手段１
４が中期覚醒度に基づいて運転者１１の中期覚醒下限値
を算出し、中期覚醒下限値が初期覚醒下限値より高いと
きに覚醒度判定手段１４が中期覚醒下限値を初期覚醒下
限値として更新するように構成されたところにある。The invention according to claim 1 is
As shown in FIGS. 1 and 2, an awakening degree detecting means 12 for detecting an initial awakening degree of the driver 11 at the time of starting the vehicle and a driving awakening degree of the driver 11 at the time of continuous driving, respectively,
Awakening means 13 which alerts the driver and awakens the driver 11
A drowsiness alarm comprising: a drowsiness determining means 14 for calculating an initial waking lower limit of the driver 11 based on the initial waking degree and activating the waking means 13 when the driving waking degree falls below the initial waking lower limit. It is an improvement of the device. The characteristic configuration includes a vehicle speed sensor 18 that detects the speed of the vehicle, and a door sensor 19 that detects the opening and closing of a door of the vehicle. The vehicle speed sensor 18 detects a state where the vehicle speed is zero, and the door sensor 19 detects a state where the door is open. After the detection, the vehicle restarts and the vehicle speed sensor 1
The awakening degree of the driver 11 at the time of restarting when the state 8 detects a state other than zero vehicle speed is defined as the middle awakening degree, and the awakening degree determining means 1
4 calculates the lower limit of the middle awakening of the driver 11 based on the middle arousal level, and when the lower limit of the middle awakening is higher than the lower limit of the initial awakening, the arousal level determination means 14 updates the lower limit of the middle awakening as the lower limit of the initial awakening. It is configured to do so.
【０００６】この請求項１に記載された居眠り警報装置
では、運転者１１がエンジンを始動すると、覚醒度検出
手段１２が運転者１１の初期覚醒度を検出し、覚醒度判
定手段１４は覚醒度検出手段１２の検出出力に基づいて
運転者１１の居眠りする寸前の初期覚醒下限値を算出す
る。運転者１１が運転を継続して運転時覚醒度が上記初
期覚醒下限値を下回ったとき、覚醒度判定手段１４は覚
醒手段１３を作動させる。一方、車両をパーキングエリ
ア等に停止し、運転者１１がエンジンを掛けたまま車両
から降りてリフレッシュした後に、ドアを開いて乗車
し、車両を再発進する、即ち車速センサ１８が車速ゼロ
を検出し、ドアセンサ１９がドアの開いたことを検出し
た後に、更に車速センサ１８が車速ゼロ以外の状態を検
出すると、覚醒度判定手段１４は上記各センサ１８，１
９の検出出力に基づいて運転者１１がリフレッシュした
と判断する。この判断により覚醒度判定手段１４は覚醒
度検出手段１２の検出出力に基づいて運転者１１の中期
覚醒下限値を算出し、リフレッシュした後の方が運転開
始初期より覚醒している場合には中期覚醒下限値を初期
覚醒下限値として更新する。In the drowsiness alarm device according to the first aspect, when the driver 11 starts the engine, the arousal level detecting means 12 detects the initial arousal level of the driver 11, and the arousal level determining means 14 sets the arousal level. Based on the detection output of the detection means 12, the initial wake-up lower limit before the driver 11 falls asleep is calculated. When the driver 11 continues driving and the driving alertness falls below the initial alertness lower limit, the alertness determining means 14 activates the alerting means 13. On the other hand, after the vehicle is stopped in a parking area or the like and the driver 11 gets off the vehicle with the engine running and refreshes, the driver opens the door and gets on the vehicle, and restarts the vehicle. That is, the vehicle speed sensor 18 detects zero vehicle speed. Then, when the vehicle speed sensor 18 further detects a state other than the vehicle speed of zero after the door sensor 19 detects that the door has been opened, the arousal level determination means 14 detects the above-mentioned sensors 18, 1
It is determined that the driver 11 has refreshed based on the detection output of No. 9. Based on this determination, the arousal level determining means 14 calculates the lower limit of the middle-term arousal level of the driver 11 based on the detection output of the arousal level detecting means 12. The wake-up lower limit is updated as the initial wake-up lower limit.
【０００７】請求項２に係る発明は、図３及び図４に示
すように、所定時間毎の運転者１１の運転時覚醒度を中
期覚醒度とし、覚醒度判定手段５４が中期覚醒度に基づ
いて運転者１１の中期覚醒下限値を算出し、中期覚醒下
限値が初期覚醒下限値より高いときに覚醒度判定手段５
４が中期覚醒下限値を初期覚醒下限値として更新するよ
うに構成されたことを特徴とする。この請求項２に記載
された居眠り警報装置では、所定時間毎に覚醒度判断の
基準となる初期覚醒下限値が更新され或いはそのまま用
いられるので、請求項１に係る発明と同様に覚醒度判定
手段５４が運転者１１の覚醒度の低下を確実に判定でき
る。According to a second aspect of the present invention, as shown in FIGS. 3 and 4, the driving awakening level of the driver 11 at predetermined time intervals is defined as a middle awakening level, and To calculate the lower limit of the middle awakening of the driver 11 when the lower limit of the middle awakening is higher than the lower limit of the initial awakening.
4 is characterized in that it is configured to update the middle wake lower limit value as the initial wake lower limit value. In the drowsiness alarm device according to the second aspect, the initial waking lower limit value serving as a reference for the arousal level determination is updated or used as it is at predetermined time intervals. 54 can reliably determine a decrease in the arousal level of the driver 11.
【０００８】[0008]
【発明の実施の形態】次に本発明の第１の実施の形態を
図面に基づいて説明する。図１に示すように、居眠り警
報装置は車両始動時の運転者１１の初期覚醒度及び運転
継続時の運転者１１の運転時覚醒度をそれぞれ検出する
覚醒度検出手段１２と、運転者１１に警報を発して運転
者１１を覚醒させる覚醒手段１３と、初期覚醒度に基づ
いて運転者１１の初期覚醒下限値を算出し運転時覚醒度
が初期覚醒下限値より低下したときに覚醒手段１３を作
動させる覚醒度判定手段１４とを備える。覚醒度検出手
段１２はこの実施の形態では運転席１６のシートバック
１６ａに内蔵された超音波センサであり、運転者１１の
心臓の脈動、即ち心拍を心臓からの超音波の反射により
検出するように構成される。超音波センサ１２は所定周
波数を発振する発振回路１７により運転者１１の心臓に
向って超音波を送波する送波部と、運転者１１の心臓か
らの反射波を受けて運転者１１の心臓の脈動、即ち心拍
を検出する検出部とを有する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the drowsiness alarm device includes an awakening degree detecting unit 12 that detects an initial awakening degree of the driver 11 at the time of starting the vehicle and an awakening degree of the driver 11 at the time of continuation of driving. Awakening means 13 for issuing an alarm to awaken the driver 11; and an awakening means 13 for calculating an initial awakening lower limit value of the driver 11 based on the initial awakening degree and when the driving awakening degree falls below the initial awakening lower limit value. Awakening degree determining means 14 to be activated. In this embodiment, the arousal detection means 12 is an ultrasonic sensor built in the seat back 16a of the driver's seat 16 and detects the pulsation of the driver's 11 heart, that is, the heartbeat by the reflection of ultrasonic waves from the heart. It is composed of The ultrasonic sensor 12 transmits an ultrasonic wave toward the heart of the driver 11 by an oscillating circuit 17 that oscillates a predetermined frequency, and receives a reflected wave from the heart of the driver 11 to receive the reflected wave from the heart of the driver 11. Pulsation, that is, a heartbeat.
【０００９】覚醒手段１３はこの実施の形態では運転者
１１に警報を発する警報ブザーであり、覚醒度判定手段
１４はマイクロコンピュータにより構成されたコントロ
ーラである。また車両には車速を検出する車速センサ１
８が設けられ、運転席側のドアにはこのドアの開閉を検
出するドアセンサ１９が設けられ、更にステアリングホ
イールには警報ブザー１３の作動を停止させる解除スイ
ッチ２１が設けられる。超音波センサ１２、車速センサ
１８、ドアセンサ１９及び解除スイッチ２１の各検出出
力はコントローラ１４に制御入力にそれぞれ接続され、
コントローラ１４の制御出力は発振回路１７及び警報ブ
ザー１３にそれぞれ接続される。In this embodiment, the awakening means 13 is an alarm buzzer for issuing an alarm to the driver 11, and the awakening degree determining means 14 is a controller constituted by a microcomputer. The vehicle has a vehicle speed sensor 1 for detecting the vehicle speed.
The door on the driver's seat side is provided with a door sensor 19 for detecting opening and closing of the door, and the steering wheel is provided with a release switch 21 for stopping the operation of the alarm buzzer 13. Each detection output of the ultrasonic sensor 12, the vehicle speed sensor 18, the door sensor 19, and the release switch 21 is connected to a control input to the controller 14, respectively.
The control output of the controller 14 is connected to the oscillation circuit 17 and the alarm buzzer 13, respectively.
【００１０】上記超音波センサ１２により運転者１１の
心拍を検出するのは下記の理由に基づく。心拍数の逆数
として求められる心拍周波数の変化に対して、心拍の拍
間時間の変動強度を表す振幅比の変化にはピークが現れ
る。このピークは運転者１１の覚醒状態に深く関連して
出現することが知られており、一般に呼吸性変動と呼ば
れている。上記ピーク、即ち呼吸性変動は緊張時には小
さな値になり、安静時には大きな値になる。従って呼吸
性変動が小さな値のときには運転者１１の覚醒度が高
く、大きな値のときには運転者１１の覚醒度が低くなっ
たと判定できるからである。The detection of the heart rate of the driver 11 by the ultrasonic sensor 12 is based on the following reasons. A peak appears in the change in the amplitude ratio indicating the fluctuation intensity of the interbeat time of the heartbeat with respect to the change in the heartbeat frequency obtained as the reciprocal of the heart rate. It is known that this peak appears in deep relation to the awake state of the driver 11, and is generally called respiratory fluctuation. The peak, i.e., the respiratory fluctuation, has a small value during tension and a large value at rest. Therefore, when the respiratory variation is a small value, the degree of awakening of the driver 11 is high, and when the value is large, it can be determined that the degree of awakening of the driver 11 is low.
【００１１】このように構成された居眠り警報装置の動
作を図１及び図２に基づいて説明する。先ず運転者１１
が車両の運転席に座ってエンジンを始動すると、居眠り
警報装置が作動し、超音波センサ１２が運転者１１の心
拍から運転者１２の初期拍間時間の変動強度の振幅比を
検出し、コントローラ１４は超音波センサ１２の検出出
力に基づいて上記振幅比を例えばエンジン始動時からｔ
1＝１０分間積算してその平均値Ｘ1を算出する。この平
均値Ｘ1には覚醒度が低下して運転者の居眠りする寸前
の覚醒度の値（初期覚醒下限値）を示す上記振幅比のピ
ークを含むように係数αが掛けられ、得られた値をＡと
する。運転者１１が運転を継続して運転時拍間時間の変
動強度の振幅比のピークが上記値Ａを越えたとき（運転
時覚醒度が初期覚醒下限値を下回ったとき）、コントロ
ーラ１４は警報ブザー１３を作動させる。この結果、居
眠り状態に陥りそうな運転者１１を覚醒させることがで
き、この警報により覚醒した運転者１１は解除スイッチ
２１を押し、警報ブザー１３を停止させる。The operation of the drowsy alarm apparatus thus configured will be described with reference to FIGS. First, driver 11
When the driver starts the engine while sitting in the driver's seat of the vehicle, the dozing alarm device is activated, and the ultrasonic sensor 12 detects the amplitude ratio of the fluctuation intensity of the initial interpulse time of the driver 12 from the heartbeat of the driver 11, Reference numeral 14 denotes the amplitude ratio based on the detection output of the ultrasonic sensor 12, for example, t
1 = accumulated to 10 minutes to calculate the average value X 1. The average value X 1 was multiplied by a coefficient α so as to include the peak of the amplitude ratio indicating the value of the arousal level immediately before the driver fell asleep and the driver fell asleep (initial arousal lower limit value). Let A be the value. When the driver 11 continues driving and the peak of the amplitude ratio of the fluctuation intensity of the interpulse time during driving exceeds the above value A (when the awakening degree during driving falls below the initial awakening lower limit value), the controller 14 issues an alarm. The buzzer 13 is operated. As a result, the driver 11 likely to fall asleep can be awakened, and the driver 11 awakened by this alarm presses the release switch 21 to stop the alarm buzzer 13.
【００１２】一方、車両をパーキングエリア等に停止
し、運転者１１がエンジンを掛けたまま車両から降りて
リフレッシュした後に、ドアを開いて乗車し、車両を再
発進する、即ち車速センサ１８が車速ゼロを検出し、ド
アセンサ１９がドアの開いたことを検出した後に、更に
車速センサ１８が車速ゼロ以外の状態を検出すると、コ
ントローラ１４は上記各センサ１８，１９の検出出力に
基づいて運転者１１がリフレッシュしたと判断する。こ
の判断によりコントローラ１４は超音波センサ１２の検
出出力に基づいて運転者１１の心拍から運転者１１の中
期拍間時間の変動強度の振幅比を例えば車両再発進時か
らｔ2＝１０分間積算してその平均値Ｘ2を算出する。こ
の平均値Ｘ2には覚醒度が低下して運転者１１の居眠り
する寸前の覚醒度の値（中期覚醒下限値）を示す上記振
幅比のピークを含むように係数αが掛けられ、得られた
値をＢとし、値Ｂが値Ａより小さい場合、即ちリフレッ
シュした後の方が運転開始初期より覚醒している場合に
は値Ｂを値Ａとして更新する。この結果、初期覚醒下限
値がより覚醒している中期覚醒下限値に更新されるの
で、コントローラ１４は運転者１１の覚醒度の低下を確
実に判定できる。また値Ｂが値Ａ以上の場合、即ち運転
開始初期の方がリフレッシュした後より覚醒している場
合には値Ｂを値Ａに更新せず、値Ａがそのまま覚醒度判
定の基準値として用いられる。On the other hand, after the vehicle is stopped in a parking area or the like and the driver 11 gets off the vehicle and refreshes while the engine is running, the driver opens the door and gets on the vehicle, and restarts the vehicle. When the vehicle speed sensor 18 detects a state other than the vehicle speed zero after detecting the zero and the door sensor 19 detects that the door is opened, the controller 14 determines the driver 11 based on the detection outputs of the sensors 18 and 19. Is determined to have been refreshed. With this determination, the controller 14 integrates the amplitude ratio of the intensity of fluctuation of the driver 11 from the heartbeat of the driver 11 based on the detection output of the ultrasonic sensor 12 to, for example, t 2 = 10 minutes from the time the vehicle restarts. Te and calculates the average value X 2. The average value X 2 is multiplied by a coefficient α so as to include the peak of the amplitude ratio indicating the value of the arousal level immediately before the driver 11 falls asleep and the driver 11 falls asleep (the lower limit of the middle arousal level). When the value B is smaller than the value A, that is, when the refreshed one is more awake than the initial operation start, the value B is updated as the value A. As a result, the initial arousal lower limit value is updated to the middle awake lower limit value that is more awake, so that the controller 14 can reliably determine a decrease in the degree of awakening of the driver 11. When the value B is greater than or equal to the value A, that is, when the driver is more awake at the beginning of the operation than after the refresh, the value B is not updated to the value A, and the value A is used as it is as a reference value for the arousal level determination. Can be
【００１３】図３及び図４は本発明の第２の実施の形態
を示す。図３において図１と同一符号は同一部品を示
す。この実施の形態では、超音波センサ１２及び解除ス
イッチ２１の各検出出力がコントローラ５４の制御入力
に接続され、コントローラ５４の制御出力は発振回路１
７及び警報ブザー１３に接続され、更に所定時間毎（例
えば１２０分毎）の運転者１１の運転時覚醒度を中期覚
醒度とし、コントローラ１４がこの中期覚醒度に基づい
て運転者１１の中期覚醒下限値を算出するように構成さ
れたことを除いて、上記第１の実施の形態と同一に構成
される。FIGS. 3 and 4 show a second embodiment of the present invention. 3, the same reference numerals as those in FIG. 1 indicate the same parts. In this embodiment, each detection output of the ultrasonic sensor 12 and the release switch 21 is connected to the control input of the controller 54, and the control output of the controller 54 is
7 and the alarm buzzer 13, and furthermore, the driving wakefulness of the driver 11 at predetermined time intervals (for example, every 120 minutes) is defined as a middle wakefulness level, and the controller 14 determines the middle wakefulness level of the driver 11 based on the medium wakefulness level. The configuration is the same as that of the first embodiment, except that the configuration is such that the lower limit is calculated.
【００１４】このように構成された居眠り警報装置で
は、所定時間毎に覚醒度判断の基準となる初期覚醒下限
値が更新され或いはそのまま用いられるので、第１の実
施の形態と同様にコントローラ１４が運転者１１の覚醒
度の低下を確実に判定して運転者１１に警報を発するこ
とができる。なお、上記第１及び第２の実施の形態で
は、覚醒度検出手段として運転者の心拍を検出する超音
波センサを用いたが、運転者の覚醒度を検出できれば運
転者のまばたきを検出するカメラや運転者の血圧を検出
する圧力センサ等を用いてもよい。In the drowsy alarm apparatus configured as described above, the initial wake-up lower limit, which is a criterion for determining the wakefulness, is updated or used as it is at predetermined time intervals. It is possible to reliably determine a decrease in the awakening degree of the driver 11 and issue an alarm to the driver 11. In the first and second embodiments, the ultrasonic sensor for detecting the driver's heartbeat is used as the arousal detection means. However, if the arousal of the driver can be detected, a camera for detecting the blink of the driver is used. Alternatively, a pressure sensor or the like for detecting the driver's blood pressure may be used.
【００１５】[0015]
【発明の効果】以上述べたように、本発明によれば、車
速がゼロでドアが開いた後に車両が再発進したときの再
発進時の運転者の覚醒度を中期覚醒度とし、覚醒度判定
手段が中期覚醒度に基づいて運転者の中期覚醒下限値を
算出し、中期覚醒下限値が初期覚醒下限値より高いとき
に覚醒度判定手段が中期覚醒下限値を初期覚醒下限値と
して更新するように構成したので、運転者がエンジンを
始動すると、覚醒度検出手段が運転者の初期覚醒度を検
出し、覚醒度判定手段が覚醒度検出手段の検出出力に基
づいて運転者の居眠りする寸前の覚醒度の値（初期覚醒
下限値）を算出する。運転者が運転を継続して運転時覚
醒度が上記初期覚醒下限値を下回ったとき、覚醒度判定
手段は覚醒手段を作動させる。As described above, according to the present invention, when the vehicle restarts after the door is opened at a vehicle speed of zero and the door is opened, the awakening degree of the driver at the time of restarting is defined as a medium-term awakening degree. The determining means calculates the driver's middle arousal lower limit based on the middle arousal level, and when the middle awake lower limit is higher than the initial awake lower limit, the arousal level determining means updates the middle awake lower limit as the initial awake lower limit. With this configuration, when the driver starts the engine, the arousal level detecting means detects the initial arousal level of the driver, and the arousal level determining means is based on the detection output of the arousal level detecting means, just before the driver falls asleep. Is calculated (lower initial wakefulness lower limit). When the driver continues driving and the awakening level during driving falls below the initial arousal lower limit, the awakening level determination unit activates the awakening unit.
【００１６】一方、車両をパーキングエリア等に停止
し、運転者がエンジンを掛けたまま車両から降りてリフ
レッシュした後に、ドアを開いて乗車し、車両を再発進
すると、車速センサが車速ゼロを検出し、ドアセンサが
ドアの開いたことを検出した後に、更に車速センサが車
速ゼロ以外の状態を検出する。覚醒度判定手段は上記各
センサの検出出力に基づいて運転者がリフレッシュした
と判断し、覚醒度検出手段の検出出力に基づいて運転者
の中期覚醒下限値を算出し、更にリフレッシュした後の
方が運転開始初期より覚醒している場合には中期覚醒下
限値を初期覚醒下限値として更新する。この結果、初期
覚醒下限値がより覚醒している中期覚醒下限値に更新さ
れるので、覚醒度判定手段は運転者の覚醒度の低下を確
実に判定できる。On the other hand, when the vehicle is stopped in a parking area or the like, the driver gets off the vehicle with the engine running and refreshes, opens the door, gets on the vehicle, and restarts the vehicle. The vehicle speed sensor detects zero vehicle speed. Then, after the door sensor detects that the door is opened, the vehicle speed sensor further detects a state other than the vehicle speed of zero. The arousal level determination means determines that the driver has refreshed based on the detection output of each of the above sensors, calculates the driver's middle arousal lower limit value based on the detection output of the arousal level detection means, and further calculates If the vehicle has been awake since the beginning of operation, the mid-term awake lower limit is updated as the initial awake lower limit. As a result, the initial arousal lower limit value is updated to the more awake middle-term arousal lower limit value, so that the arousal level determination unit can reliably determine a decrease in the arousal level of the driver.
【００１７】また所定時間毎の運転者の運転時覚醒度を
中期覚醒度とし、覚醒度判定手段が中期覚醒度に基づい
て運転者の中期覚醒下限値を算出し、中期覚醒下限値が
初期覚醒下限値より高いときに覚醒度判定手段が中期覚
醒下限値を初期覚醒下限値として更新するように構成す
れば、上記と同様に覚醒度判定手段が運転者の覚醒度の
低下を確実に判定できる。The driver's awakening level at predetermined time intervals is defined as a mid-term awakening level, and the arousal level determining means calculates a driver's medium-term awakening lower limit value based on the medium-term awakening level. If the wakefulness determination means is configured to update the middle wakefulness lower limit as the initial wakefulness lower limit when the wakefulness determination means is higher than the lower limit, the wakefulness determination means can reliably determine a decrease in the wakefulness of the driver in the same manner as described above. .
【図１】本発明第１実施形態の居眠り警報装置を含む構
成図。FIG. 1 is a configuration diagram including a dozing alarm device according to a first embodiment of the present invention.
【図２】その居眠り警報装置の動作を示すフローチャー
ト。FIG. 2 is a flowchart showing the operation of the dozing alarm device.
【図３】本発明第２実施形態の居眠り警報装置を含む構
成図。FIG. 3 is a configuration diagram including a dozing alarm device according to a second embodiment of the present invention.
【図４】その居眠り警報装置の動作を示すフローチャー
ト。FIG. 4 is a flowchart showing the operation of the dozing alarm device.
１１ 運転者 １２ 超音波センサ（覚醒度検出手段） １３ 警報ブザー（覚醒手段） １４，５４ コントローラ（覚醒度判定手段） １８ 車速センサ １９ ドアセンサ 11 Driver 12 Ultrasonic Sensor (Arousal Level Detecting Means) 13 Warning Buzzer (Awakening Means) 14, 54 Controller (Arousal Level Determining Means) 18 Vehicle Speed Sensor 19 Door Sensor
Claims (2)
び運転継続時の前記運転者(11)の運転時覚醒度をそれぞ
れ検出する覚醒度検出手段(12)と、前記運転者(11)に警
報を発して前記運転者(11)を覚醒させる覚醒手段(13)
と、前記初期覚醒度に基づいて前記運転者(11)の初期覚
醒下限値を算出し前記運転時覚醒度が前記初期覚醒下限
値より低下したときに前記覚醒手段(13)を作動させる覚
醒度判定手段(14)とを備えた居眠り警報装置において、 前記車両の速度を検出する車速センサ(18)と、前記車両
のドアの開閉を検出するドアセンサ(19)とを備え、 前記車速センサ(18)が車速ゼロの状態を検出し前記ドア
センサ(19)が前記ドア開の状態を検出した後に前記車両
が再発進して前記車速センサ(18)が車速ゼロ以外の状態
を検出したときの前記再発進時の運転者(11)の覚醒度を
中期覚醒度とし、 前記覚醒度判定手段(14)が前記中期覚醒度に基づいて前
記運転者(11)の中期覚醒下限値を算出し、 前記中期覚醒下限値が前記初期覚醒下限値より高いとき
に前記覚醒度判定手段(14)が前記中期覚醒下限値を前記
初期覚醒下限値として更新するように構成された居眠り
警報装置。An arousal level detecting means for detecting an initial arousal level of the driver at the time of starting the vehicle and an arousal level of the driver at the time of continuous driving; Awakening means (13) for issuing an alarm to (11) and awakening the driver (11)
And an awakening degree that activates the awakening means (13) when the initial awakening lower limit of the driver (11) is calculated based on the initial awakening degree and the driving awakening degree is lower than the initial awakening lower limit value. A drowsiness alarm device comprising: a vehicle speed sensor (18) that detects a speed of the vehicle; and a door sensor (19) that detects opening and closing of a door of the vehicle, wherein the vehicle speed sensor (18) ) Detects the state of zero vehicle speed and the door sensor (19) detects the state of opening the door, and then the vehicle restarts and the vehicle speed sensor (18) detects the state other than zero vehicle speed. The arousal level of the driver (11) at the time of starting is defined as a middle arousal level, and the arousal level determination means (14) calculates a lower limit of the middle arousal level of the driver (11) based on the middle arousal level. When the arousal lower limit is higher than the initial arousal lower limit, the arousal degree determination means (14) is A drowsiness alarm device configured to update a middle wake lower limit value as the initial wake lower limit value.
び運転継続時の前記運転者(11)の運転時覚醒度をそれぞ
れ検出する覚醒度検出手段(12)と、前記運転者(11)に警
報を発して前記運転者(11)を覚醒させる覚醒手段(13)
と、前記初期覚醒度に基づいて前記運転者(11)の初期覚
醒下限値を算出し前記運転時覚醒度が前記初期覚醒下限
値より低下したときに前記覚醒手段(13)を作動させる覚
醒度判定手段(54)とを備えた居眠り警報装置において、 所定時間毎の前記運転者(11)の運転時覚醒度を中期覚醒
度とし、 前記覚醒度判定手段(54)が前記中期覚醒度に基づいて前
記運転者(11)の中期覚醒下限値を算出し、 前記中期覚醒下限値が前記初期覚醒下限値より高いとき
に前記覚醒度判定手段(54)が前記中期覚醒下限値を前記
初期覚醒下限値として更新するように構成された居眠り
警報装置。2. A wakefulness detection means (12) for detecting an initial wakefulness of the driver (11) at the time of starting the vehicle and a wakefulness of the driver (11) at the time of continuation of driving, respectively; Awakening means (13) for issuing an alarm to (11) and awakening the driver (11)
And an awakening degree that activates the awakening means (13) when the initial awakening lower limit of the driver (11) is calculated based on the initial awakening degree and the driving awakening degree is lower than the initial awakening lower limit value. A drowsiness alarm device comprising a determination means (54), wherein the driving arousal level of the driver (11) at predetermined time intervals is defined as a mid-term arousal level, and the arousal level determination means (54) is based on the middle-level arousal level. The driver (11) calculates a middle awake lower limit, and when the middle awake lower limit is higher than the initial awake lower limit, the arousal level determination means (54) sets the middle awake lower limit to the initial awake lower limit. A doze alarm device configured to update as a value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18900798A JP3617776B2 (en) | 1998-07-03 | 1998-07-03 | Dozing alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18900798A JP3617776B2 (en) | 1998-07-03 | 1998-07-03 | Dozing alarm device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000016115A true JP2000016115A (en) | 2000-01-18 |
| JP3617776B2 JP3617776B2 (en) | 2005-02-09 |
Family
ID=16233748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18900798A Expired - Fee Related JP3617776B2 (en) | 1998-07-03 | 1998-07-03 | Dozing alarm device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3617776B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007094542A (en) * | 2005-09-27 | 2007-04-12 | Denso Corp | Danger occurring place information collecting system and in vehicle unit |
| KR101370494B1 (en) * | 2011-12-14 | 2014-03-10 | 포항공과대학교 산학협력단 | Apparatus and method for preventing dozing off while driving |
| CN112950900A (en) * | 2021-01-27 | 2021-06-11 | 吉林云帆智能工程有限公司 | Driver behavior monitoring and detecting method |
| JP2021111006A (en) * | 2020-01-07 | 2021-08-02 | トヨタ自動車株式会社 | Vehicle monitoring device |
-
1998
- 1998-07-03 JP JP18900798A patent/JP3617776B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007094542A (en) * | 2005-09-27 | 2007-04-12 | Denso Corp | Danger occurring place information collecting system and in vehicle unit |
| JP4539514B2 (en) * | 2005-09-27 | 2010-09-08 | 株式会社デンソー | Hazardous location information collection system and in-vehicle equipment |
| KR101370494B1 (en) * | 2011-12-14 | 2014-03-10 | 포항공과대학교 산학협력단 | Apparatus and method for preventing dozing off while driving |
| JP2021111006A (en) * | 2020-01-07 | 2021-08-02 | トヨタ自動車株式会社 | Vehicle monitoring device |
| JP7524542B2 (en) | 2020-01-07 | 2024-07-30 | トヨタ自動車株式会社 | Vehicle monitoring device |
| CN112950900A (en) * | 2021-01-27 | 2021-06-11 | 吉林云帆智能工程有限公司 | Driver behavior monitoring and detecting method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3617776B2 (en) | 2005-02-09 |
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