JPH0710653B2 - Rear impact warning device - Google Patents
Rear impact warning deviceInfo
- Publication number
- JPH0710653B2 JPH0710653B2 JP1071936A JP7193689A JPH0710653B2 JP H0710653 B2 JPH0710653 B2 JP H0710653B2 JP 1071936 A JP1071936 A JP 1071936A JP 7193689 A JP7193689 A JP 7193689A JP H0710653 B2 JPH0710653 B2 JP H0710653B2
- Authority
- JP
- Japan
- Prior art keywords
- vehicle distance
- driver
- end collision
- inter
- vehicle
- 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 - Fee Related
Links
Landscapes
- Measuring And Recording Apparatus For Diagnosis (AREA)
- Radar Systems Or Details Thereof (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、車両に適用される追突警報装置に関し、特
に、ドライバーの状態を監視して警報を発し、不要作動
や誤作動を防止した追突警報装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear-end collision warning device applied to a vehicle, and more particularly to a rear-end collision alarm device which monitors a driver's condition and issues an alarm to prevent unnecessary operation or malfunction. Regarding
従来の技術 車両の追突防止装置は、先行車や障害物との距離が所定
の値より小さい場合に警報を発して追突を未然に防止す
るための装置であって、従来の追突警報装置を第２図の
ブロック図に基づいて説明する。2. Description of the Related Art A rear-end collision prevention device for a vehicle is a device for issuing a warning when a distance to a preceding vehicle or an obstacle is smaller than a predetermined value to prevent a rear-end collision. A description will be given based on the block diagram of FIG.
図によれば、追突警報装置は、車間距離Ｄ及び相対速度
Vrを測定するレーダセンサ１と、自車速度V1を測定する
速度計２と、入力されたデータを演算処理する制御部
４′とを具備し、制御部４′では、入力された相対速度
Vr、自車速度V1などのデータから安全車間距離Dsを算出
してレーダセンサ１で測定した実際の車間距離Ｄと比較
するように構成されている。そして、車間距離Ｄが安全
車間距離Dsより小さい場合には警報を発してドライバー
に知らせ、居眠りや漫然運転などによる追突を未然に防
止することができる。According to the figure, the rear-end collision warning device shows that the inter-vehicle distance D and the relative speed are
It comprises a radar sensor 1 for measuring Vr, a speedometer 2 for measuring the own vehicle speed V 1 , and a control section 4'for arithmetically processing the input data.
The safe inter-vehicle distance Ds is calculated from data such as Vr and the vehicle speed V 1 and is compared with the actual inter-vehicle distance D measured by the radar sensor 1. Then, when the inter-vehicle distance D is smaller than the safe inter-vehicle distance Ds, an alarm is issued to notify the driver to prevent a rear-end collision due to a drowsiness or a casual driving.
発明が解決しようとする課題 ところで、前述した従来の追突警報装置によれば、安全
車間距離Dsの算出には判断時間td及び操作時間txといっ
たドライバーの個人差や状態に大きく左右される要素が
含まれている。このため、不特定多数のドライバー全員
の感覚に合った警報タイミングを設定するのは困難であ
った。しかも、同一ドライバーであってもその状態は常
に一定ではないことや、ガードレールや橋脚などに反応
して誤作動する場合もあり、ドライバーを含めない装置
側でのソフト処理による対応だけでは限界があって不都
合だった。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention According to the above-mentioned conventional rear-end collision warning device, the calculation of the safe inter-vehicle distance Ds includes elements such as the judgment time td and the operation time tx, which are largely influenced by the individual difference and the state of the driver. Has been. Therefore, it is difficult to set an alarm timing that matches the feelings of all unspecified drivers. Moreover, even with the same driver, the condition is not always constant, and there are cases where it malfunctions in response to guardrails, piers, etc.Therefore, there is a limit only by the software processing on the side of the device that does not include the driver. It was inconvenient.
課題を解決するための手段 本発明は、前述した課題を解決するためになされたもの
で、レーダセンサで測定した車間距離（Ｄ）が安全車間
距離（Ds）より小さくなるとドライバーに警報を発して
追突を防止する追突警報装置において、覚醒度モニター
を設けてドライバーの覚醒度（Ｗ）を監視し、該覚醒度
（Ｗ）が基準値（Wo）より小さくかつ前記車間距離
（Ｄ）が前記安全車間距離（Ds）より小さい場合にのみ
追突防止の警報を発すると共に、該覚醒度（Ｗ）の低下
に応じて前記安全車間距離（Ds）を長く設定するように
構成したことを特徴とする追突警報装置である。Means for Solving the Problems The present invention has been made to solve the problems described above, and when the inter-vehicle distance (D) measured by a radar sensor becomes smaller than the safe inter-vehicle distance (Ds), an alarm is issued to the driver. In a rear-end collision warning device for preventing a rear-end collision, a wakefulness monitor is provided to monitor the wakefulness (W) of a driver, the wakefulness (W) is smaller than a reference value (Wo), and the inter-vehicle distance (D) is the safety level. A rear impact collision warning is issued only when the distance is smaller than the inter-vehicle distance (Ds), and the safe inter-vehicle distance (Ds) is set to be long according to the decrease in the awakening degree (W). It is an alarm device.
作用 前述の手段によれば、ドライバーの覚醒度を監視するこ
とにより、居眠り運転時や朦朧運転時などのような覚醒
度Ｗが基準値Woより小さくなる異常運転時でかつ車間距
離Ｄが安全車間距離Dsよりも小さくなった場合にのみ危
険と判断して警報を出すことができる。しかも、覚醒度
Ｗの低下に応じて安全車間距離Dsを長く設定するため、
覚醒度が低い時ほど警報のタイミングをはやくしてドラ
イバーの対応時間を確保することもできる。Action According to the above-described means, by monitoring the driver's arousal level, the vehicle-to-vehicle distance D becomes safe and the vehicle-to-vehicle distance D becomes safe when the awakening level W becomes smaller than the reference value Wo, such as during a drowsiness driving or a dazzling driving. Only when it becomes smaller than the distance Ds, it is possible to judge that it is dangerous and issue an alarm. Moreover, since the safe inter-vehicle distance Ds is set longer according to the decrease in the awakening degree W,
The lower the alertness is, the earlier the alarm timing can be set to secure the driver's response time.
実施例 本発明による追突警報装置の一実施例を第１図のブロッ
ク図に基づいて説明すると、追突警報装置は、車間距離
Ｄおよび相対速度Vrを測定するレーダセンサ１と、自車
速度V1を測定する速度計２と、ドライバーの覚醒度Ｗを
監視する覚醒度モニター３と、入力されたデータを演算
処理する制御部４とを具備して構成されている。レーダ
センサ１では、送光部から前方へ照射したレーザビーム
が先行車などの障害物に反射して受光部に戻ってくるま
での時間から車間距離Ｄを測定すると共に、車間距離の
時間変化から相対速度Vrを測定して制御部４へ入力す
る。また、覚醒度モニター３ではドライバーの運転状態
を常に監視し、瞬間瞬間の覚醒度Ｗをたとえば連続的な
電圧レベルとして定量的に検知して制御部４へ入力す
る。ここで検知された覚醒度Ｗは、ドライバーが正常な
状態で運転している場合は基準値Wo以上となるが、居眠
り運転や朦朧運転などの異常時にはその程度に応じて小
さくなる。そして、制御部４では入力された各データに
基づいて安全車間距離Dsを算出するが、ドライバーの判
断・操作時間Ｔは覚醒度Ｗに応じた値を決定する。すな
わち、覚醒度Ｗが大きくなるにつれて判断・操作時間Ｔ
は小さくなるようにマップ化するなどして定めておくこ
とにより、たとえば覚醒度がW1の時には判断・操作時間
をT1と決定することができ、これによりドライバーの覚
醒度が低いため判断力や操作能力も低下している状態で
の判断・操作時間Ｔは長く設定される。この結果、覚醒
度Ｗの低下に応じて安全車間距離Dsは長く設定されるこ
とになり、こうして得られた安全車間距離Dsはレーダセ
ンサ１で測定した実際の車間距離Ｄと比較され、覚醒度
Ｗが基準値Woより小さくかつ車間距離Ｄが安全車間距離
Dsより小さい場合には危険と判断してドライバーへ警報
を発して追突を防止するのである。なお、警報を発する
のと同時にブレーキを作動させ、車両を自動的に停止さ
せることも可能である。EXAMPLE An example of the rear-end collision warning device according to the present invention will be described with reference to the block diagram of FIG. 1. The rear-end collision alarm device includes a radar sensor 1 for measuring an inter-vehicle distance D and a relative speed Vr, and a vehicle speed V 1 And a wakefulness monitor 3 that monitors the driver's wakefulness W, and a control unit 4 that processes input data. The radar sensor 1 measures the inter-vehicle distance D from the time until the laser beam emitted from the light-transmitting unit forwards is reflected by an obstacle such as a preceding vehicle and returns to the light-receiving unit. The relative velocity Vr is measured and input to the control unit 4. The awakening level monitor 3 constantly monitors the driving state of the driver, quantitatively detects the instantaneous awakening level W as, for example, a continuous voltage level, and inputs it to the control unit 4. The arousal level W detected here is equal to or higher than the reference value Wo when the driver is driving in a normal state, but becomes smaller according to the degree during an abnormality such as a drowsy drive or a dazzling drive. Then, the control unit 4 calculates the safe inter-vehicle distance Ds based on the input data, but the driver's judgment / operation time T determines a value according to the awakening degree W. That is, the determination / operation time T increases as the awakening degree W increases.
By setting the map so that it becomes smaller, for example, when the awakening degree is W 1 , the judgment / operation time can be determined as T 1 , which makes the driver's awakening degree low and the judgment power The judgment / operation time T is set to be long when the operation ability is reduced. As a result, the safe inter-vehicle distance Ds is set longer according to the decrease in the wakefulness W, and the safe inter-vehicle distance Ds thus obtained is compared with the actual inter-vehicle distance D measured by the radar sensor 1 to determine the wakefulness. W is smaller than the reference value Wo and the inter-vehicle distance D is a safe inter-vehicle distance
If it is smaller than Ds, it is judged as dangerous and an alarm is issued to the driver to prevent a rear-end collision. It is also possible to automatically stop the vehicle by activating the brake at the same time as issuing the alarm.
上述した追突警報装置によれば、覚醒度モニター３によ
ってドライバーの状態を常に監視し、ドライバーが覚醒
度の高い正常運転をしている限り警報を発することはな
く、従って、正常運転時にはドライバーの判断で運転を
続けることになる。しかし、ドライバーが正常な状態で
の追突事故発生率はきわめて低く、むしろ、ドライバー
のブレーキタイミングよりはやい警報、あるいはガード
レールや橋脚などに反応する警報などが頻繁に発せられ
るといった煩わしさからドライバーが解放されて好都合
である。一方、ドライバーの覚醒度が低い異常運転時に
は、車の流れや道路状況の変化に対してドライバーが適
切な対応をするのは困難な状況にある。従って、自車の
前方に存在する先行車や障害物までの距離、すなわち車
間距離Ｄが安全車間距離Dsより小さくなった時点で警報
を発し、ドライバーに注意を促して追突を防止する。こ
の場合、警報の対象が先行車ではなくガードレールなど
の障害物であってもそのまま直進して衝突する恐れがあ
り、正常運転時の誤警報とは異なって事故防止に貢献す
る。しかも、覚醒度Ｗが小さい程判断・操作時間Ｔは長
くなるため、安全車間距離Dsも覚醒度が小さい程長く設
定されることになり、はやめの警報が発せられることに
なる。従って、ドライバーが覚醒度を回復して適切な対
応を実施できるようになるまでの時間を確保しやすくな
り、ドライバーの状態に合った追突警報装置となる。な
お、覚醒度Ｗが基準値Wo以下であることを警報発生のア
ンド条件とするかわりに、安全車間距離Dsの設定を段階
的に厳密なものとし、覚醒度が高い時程より短い安全車
間距離と比較して警報を発するようにしてもよい。According to the rear-end collision warning device described above, the driver's condition is constantly monitored by the awakening degree monitor 3, and no warning is issued as long as the driver is driving normally with high awakening degree. Will continue to drive. However, the incidence of rear-end collisions is extremely low when the driver is in a normal state, and rather, the driver is released from the hassle of being frequently alerted rather than the driver's braking timing or alerting to guardrails or piers. It is convenient. On the other hand, it is difficult for the driver to properly respond to changes in the flow of vehicles and changes in road conditions during abnormal driving when the driver's awakening level is low. Therefore, when the distance to a preceding vehicle or an obstacle existing in front of the own vehicle, that is, the inter-vehicle distance D becomes smaller than the safe inter-vehicle distance Ds, an alarm is issued to alert the driver to prevent a rear-end collision. In this case, even if the object of the alarm is not the preceding vehicle but an obstacle such as a guardrail, there is a risk of going straight and colliding, which contributes to accident prevention unlike the false alarm during normal operation. Moreover, the smaller the awakening degree W is, the longer the determination / operation time T is. Therefore, the safe inter-vehicle distance Ds is set longer as the awakening degree is smaller, and the stop alarm is issued. Therefore, it becomes easier to secure the time until the driver recovers the arousal level and can take appropriate measures, and the rear-end collision warning device suits the driver's condition. In addition, instead of setting that the alertness W is less than or equal to the reference value Wo as the AND condition for the alarm generation, the safe inter-vehicle distance Ds is set to be stricter in stages, and the safe inter-vehicle distance is shorter than when the wakefulness is high. An alarm may be issued in comparison with.
発明の効果 前述の本発明によれば、ドライバーの覚醒度を常に監視
してその時の状態に合った警報を発することのできる追
突警報装置となる。従って、ドライバーは正常運転時の
警報誤作動やブレーキタイミングの個人差などによる警
報から解放されることになり、追突警報装置への信頼感
が著しく向上するため追突事故防止の効果は大きい。EFFECTS OF THE INVENTION According to the present invention described above, the rear-end collision warning device is capable of constantly monitoring the awakening degree of the driver and issuing an alarm suitable for the state at that time. Therefore, the driver is relieved of the alarm due to the malfunction of the alarm during normal driving and the individual difference of the brake timing, and the reliability of the rear-end collision alarm device is significantly improved, and the effect of preventing the rear-end collision accident is great.
第１図は本発明による追突防止装置の一実施例を示すブ
ロック図、第２図は従来例を示すブロック図である。 １……レーダセンサ、２……速度計、３……覚醒度モニ
ター、４……制御部。FIG. 1 is a block diagram showing an embodiment of a rear-end collision prevention device according to the present invention, and FIG. 2 is a block diagram showing a conventional example. 1 ... Radar sensor, 2 ... Speedometer, 3 ... Arousal level monitor, 4 ... Control unit.
フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ６０Ｒ 21/00 Ｃ 9434−3Ｄ Ｇ０１Ｓ 13/93 Continuation of the front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location B60R 21/00 C 9434-3D G01S 13/93
Claims (1)
安全車間距離（Ds）より小さくなるとドライバーに警報
を発して追突を防止する追突警報装置において、覚醒度
モニターを設けてドライバーの覚醒度（Ｗ）を監視し、
該覚醒度（Ｗ）が基準値（Wo）より小さくかつ前記車間
距離（Ｄ）が前記安全車間距離（Ds）より小さい場合に
のみ追突防止の警報を発すると共に、該覚醒度（Ｗ）の
低下に応じて前記安全車間距離（Ds）を長く設定するよ
うに構成したことを特徴とする追突警報装置。1. A rear-end collision warning device for alerting a driver when a vehicle-to-vehicle distance (D) measured by a radar sensor is smaller than a safe vehicle-to-vehicle distance (Ds) to prevent a rear-end collision. (W) is monitored,
Only when the awakening degree (W) is smaller than the reference value (Wo) and the inter-vehicle distance (D) is smaller than the safe inter-vehicle distance (Ds), an alarm for preventing a rear-end collision is issued, and the awakening degree (W) is reduced. A rear-end collision warning device characterized in that the safety inter-vehicle distance (Ds) is set to be long according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1071936A JPH0710653B2 (en) | 1989-03-27 | 1989-03-27 | Rear impact warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1071936A JPH0710653B2 (en) | 1989-03-27 | 1989-03-27 | Rear impact warning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02254030A JPH02254030A (en) | 1990-10-12 |
| JPH0710653B2 true JPH0710653B2 (en) | 1995-02-08 |
Family
ID=13474893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1071936A Expired - Fee Related JPH0710653B2 (en) | 1989-03-27 | 1989-03-27 | Rear impact warning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0710653B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005199802A (en) * | 2004-01-14 | 2005-07-28 | Hino Motors Ltd | Collision warning device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0581770U (en) * | 1992-03-31 | 1993-11-05 | 株式会社小糸製作所 | Vehicle radar device |
| JPH05325098A (en) * | 1992-05-18 | 1993-12-10 | Honda Motor Co Ltd | Driving warning device for vehicle |
| JPH1086697A (en) * | 1996-09-13 | 1998-04-07 | Fujitsu Ten Ltd | Warning device for vehicle control system |
| JP6485057B2 (en) | 2015-01-19 | 2019-03-20 | アイシン精機株式会社 | Driving assistance device |
| JP6477665B2 (en) * | 2016-11-04 | 2019-03-06 | マツダ株式会社 | Vehicle operation period estimation device |
| CN112049043A (en) * | 2020-08-21 | 2020-12-08 | 江苏扬航绳网带有限公司 | Method for preventing automobile from being scratched and parking spot lock with alarming function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5522291A (en) * | 1978-08-05 | 1980-02-16 | Alps Electric Co Ltd | Manufacture of magnetic head |
-
1989
- 1989-03-27 JP JP1071936A patent/JPH0710653B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005199802A (en) * | 2004-01-14 | 2005-07-28 | Hino Motors Ltd | Collision warning device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02254030A (en) | 1990-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6037860A (en) | Method and arrangement for avoiding and/or minimizing vehicle collisions in road traffic | |
| JP3104463B2 (en) | Rear-end collision prevention device for vehicles | |
| US5091726A (en) | Vehicle anti-collision system | |
| EP0549909B1 (en) | Warning apparatus for a vehicle | |
| US6624747B1 (en) | Method for preventing the collision of a vehicle with an obstacle located in front of the vehicle and braking device | |
| JPH02246838A (en) | Safety control device | |
| US7061374B2 (en) | Computer assisted danger alarm with emergency braking system | |
| JP3115457B2 (en) | Driver abnormal condition alarm device | |
| US6864783B2 (en) | Potential collision detection and reversing aid system | |
| JP3391091B2 (en) | Inter-vehicle distance alarm | |
| JPH0710653B2 (en) | Rear impact warning device | |
| JP3581916B2 (en) | Inter-vehicle distance alarm | |
| JP3334326B2 (en) | Stopper distance alarm | |
| JP2574886Y2 (en) | Auto brake equipment for automobiles | |
| JP2536306B2 (en) | Inter-vehicle distance detection / warning device | |
| KR0184815B1 (en) | Protective crash system for a vehicle | |
| KR0168767B1 (en) | Alarm device for car crash prevention | |
| CN212353799U (en) | Automobile safety system | |
| JP2748286B2 (en) | Inter-vehicle distance detection and alarm device | |
| US20200223357A1 (en) | Vehicle safety alert system | |
| JPH06231394A (en) | Inter-vehicle distance alarming device | |
| KR960013290B1 (en) | Car collision protection method | |
| JPH11139178A (en) | Doze-driving detecting device | |
| KR960010158B1 (en) | Car collision protecting device and method using auto-conversion of sensor | |
| JP2917698B2 (en) | Inter-vehicle distance alarm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |