JPH069920Y2 - Rear-end collision warning system for automobiles - Google Patents
Rear-end collision warning system for automobilesInfo
- Publication number
- JPH069920Y2 JPH069920Y2 JP8587988U JP8587988U JPH069920Y2 JP H069920 Y2 JPH069920 Y2 JP H069920Y2 JP 8587988 U JP8587988 U JP 8587988U JP 8587988 U JP8587988 U JP 8587988U JP H069920 Y2 JPH069920 Y2 JP H069920Y2
- Authority
- JP
- Japan
- Prior art keywords
- detecting means
- end collision
- vehicle
- laser radar
- collision warning
- 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
- 239000011521 glass Substances 0.000 description 10
- 241000533950 Leucojum Species 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 230000006837 decompression Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000010365 information processing Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Emergency Alarm Devices (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は、自動車の追突警報装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a rear-end collision warning device for a vehicle.
［従来の技術］ かかる装置は知られている（本出願人による実開昭６３
−２４７００号公報および自動車技術会学術講演会前刷
集８８１．昭和６３−５）。[Prior Art] Such a device is known (Actually developed by the applicant of the present application, Sho 63
-24700 Publication and Preprints of the Automotive Engineering Society Academic Lecture 881. 63-5).
その後者の装置を第３図ないし第６図について説明する
と、該装置は、第１クロスメンバ７に取付けられた距離
検出手段であるレーザ・レーダヘッド１と、そのヘッド
１からの信号を受けて距離を表示する距離表示装置２
と、車間距離の時間変化による先行車Ｂの速度と車速検
出手段である車速センサ５による自車Ａの速度とから安
全車間距離を計算する手段である制動距離計算回路、警
報発生判定手段である警報発生判定回路等を設けた情報
処理装置３と、情報処理装置３からの信号で距離表示や
警報装置に警報発令を行うとともにドライバが可変スイ
ッチを操作する入力部をもつ表示スイッチボックス４
と、モニタ出力回路６とからなっている。The latter device will be described with reference to FIGS. 3 to 6. The device is a laser radar head 1 which is a distance detecting means attached to the first cross member 7 and receives a signal from the head 1. Distance display device 2 for displaying distance
And a braking distance calculation circuit that is a means for calculating a safe inter-vehicle distance from the speed of the preceding vehicle B due to the time change of the inter-vehicle distance and the speed of the own vehicle A by the vehicle speed sensor 5 that is the vehicle speed detection means, and an alarm generation determination means. An information processing device 3 provided with an alarm occurrence determination circuit and the like, and a display switch box 4 having an input section for displaying a distance and issuing an alarm to the alarm device by a signal from the information processing device 3 and for a driver to operate a variable switch.
And a monitor output circuit 6.
上記レーザ・レーダヘッド１は、第５図に示すようにレ
ーザ・ビームＣを前方に照射し、先行車Ｂのリフレクタ
８からの反射光Ｃ１が戻ってくる時間から車間距離Ｄを
測定する。ここで、 Ｖ１…自車速度 Ｖ２…先行車速度 α１…自車の制動減速度 α２…先行車の制動減速度 Ｄｒ…安全車間距離 Ｄｓ…停止先行車時の安全車間距離 Ｔｄ…空走時間（例えば１秒に固定） Ｔｘ…制動動作を起こすまでの判断時間（可変） Ｔｙ…停止先行車時の判断時間（可変） とすると、 Ｄｒ＝Ｖ１（Ｔｄ＋Ｔｘ）＋（Ｖ１２／２α１ −Ｖ２２／２α２） …（１） Ｄｓ＝Ｖ１（Ｔｄ＋Ｔｙ）＋Ｖ１２／２α１…（２） で示される。The laser radar head 1 irradiates the laser beam C forward as shown in FIG. 5, and measures the inter-vehicle distance D from the time when the reflected light C1 from the reflector 8 of the preceding vehicle B returns. Here, V1 ... Vehicle speed V2 ... Preceding vehicle speed α1 ... Vehicle braking deceleration α2 ... Preceding vehicle braking deceleration Dr ... Safe inter-vehicle distance Ds ... Safe inter-vehicle distance when stopped preceding vehicle Td ... Duration time ( For example, fixed to 1 second) Tx ... Judgment time (variable) until braking operation is performed Ty ... Judgment time (variable) when the preceding vehicle is stopped: Dr = V1 (Td + Tx) + (V1 2 / 2α1-V2 2 / 2α2) (1) Ds = V1 (Td + Ty) + V1 2 / 2α1 (2)
そこで、Ｄ＜Ｄｒ、Ｄ＜Ｄｓのときに警報を出すように
している。Therefore, an alarm is issued when D <Dr and D <Ds.
すなわち第６図において、初期設定を行い（ステップＳ
１）、車速センサ５からの信号に基づいて自車速Ｖ１を
計算し（ステップＳ２）、レーダヘッド１からの信号に
基づいて車間距離Ｄを計算し加算する（ステップＳ
３）。次いで、Ｔｘ、Ｔｙ、α１、α２の各スイッチの
ＯＮ・ＯＦＦポジションを１０マイクロ秒毎に入力する
（ステップＳ４、Ｓ５）。次いで、レーダヘッド１から
の信号を１００マイクロ秒間加算し、この間に５０％以
上の反射光Ｃ１が返ってくれば対象物を検知していると
判断し、その間の距離データの平均値を求め、かつ、最
小二乗法により距離の変化から自車Ａと先行車Ｂとの相
対速度を計算する。また、相対速度の値により移動対象
物と停止対象物を判断する（ステップＳ６、Ｓ７）。次
いで、式（１）、（２）によりＤｒ、Ｄｓを計算し（ス
テップＳ８）、Ｄ＜ＤｒまたはＤ＜Ｄｓのときに警報ラ
ンプに出力し（ステップＳ９）、モニタに出力して（ス
テップＳ１０）、ステップＳ２に戻る制御を行い、追突
の防止を図っている。That is, in FIG. 6, initial setting is performed (step S
1), the own vehicle speed V1 is calculated based on the signal from the vehicle speed sensor 5 (step S2), and the inter-vehicle distance D is calculated and added based on the signal from the radar head 1 (step S).
3). Next, the ON / OFF positions of the Tx, Ty, α1, and α2 switches are input every 10 microseconds (steps S4 and S5). Next, the signals from the radar head 1 are added for 100 microseconds, and if 50% or more of the reflected light C1 is returned during this period, it is determined that the target object is detected, and the average value of the distance data during that period is calculated. Moreover, the relative speed between the own vehicle A and the preceding vehicle B is calculated from the change in the distance by the least squares method. Further, the moving object and the stationary object are determined based on the value of the relative speed (steps S6 and S7). Then, Dr and Ds are calculated by the equations (1) and (2) (step S8), and when D <Dr or D <Ds, output to an alarm lamp (step S9) and output to a monitor (step S10). ), Control is returned to step S2 to prevent a rear-end collision.
［考案が解決しようとする課題］ 上記の従来装置のレーザ・レーダセンサは、発光部と受
光部とを備えており、両部ともケース内に収められてい
る。そのケースの前面には光の透過率の高いガラス等の
透明部材が設けられているが、雨滴、泥、雪片等がガラ
ス面に付着すると、光の透過率が低下し、発光、受光が
妨げられてレーザ・レーダセンサの機能が低下し、警報
の発生が不確実になる。[Problems to be Solved by the Invention] The laser radar sensor of the conventional device described above includes a light emitting portion and a light receiving portion, and both portions are housed in a case. A transparent member such as glass with high light transmittance is provided on the front surface of the case, but if raindrops, mud, snowflakes, etc. adhere to the glass surface, the light transmittance will decrease and light emission and light reception will be blocked. As a result, the function of the laser / radar sensor deteriorates and the alarm is uncertain.
他方、本出願人は実開昭５８−３３３５７号公報におい
て、洗浄液によるヘッドランプのウォッシャ装置を提案
している。On the other hand, the applicant of the present invention has proposed a washer device for a headlamp using a cleaning solution in Japanese Utility Model Laid-Open No. 58-33357.
したがって本考案は、雨滴、泥等の前面透明部材への付
着によるレーザ・レーダセンサの機能低下を防止する自
動車の追突警報装置を提供することを目的としている。Therefore, it is an object of the present invention to provide a rear-end collision warning device for a vehicle, which prevents the deterioration of the function of the laser radar sensor due to the adhesion of raindrops, mud or the like to the front transparent member.
［課題を解決するための手段］ 本考案によれば、車速検出手段と、レーザ・レーダセン
サからなる距離検出手段と、該両手段からの信号に基づ
き安全車間距離を計算する制動距離検出手段と、該手段
と前記距離検出手段からの信号に基づき警報の発生を判
定する警報発生判定手段と、警報装置とを備えた自動車
の追突警報装置において、前記レーザ・レーダセンサの
発光部および受光部の前面に高圧空気を噴出してエアカ
ーテンを形成するノズルを設け、該ノズルを電磁ソレノ
イドバルブを介してサージタンクに接続し、該電磁ソレ
ノイドバルブをキャブ内の手元スイッチに接続してい
る。[Means for Solving the Problems] According to the present invention, a vehicle speed detecting means, a distance detecting means including a laser radar sensor, and a braking distance detecting means for calculating a safe inter-vehicle distance based on signals from both means. In a rear-end collision warning device for an automobile, which comprises an alarm occurrence determination means for determining the occurrence of an alarm based on a signal from the means and the distance detection means, and a warning device for a vehicle, a light emitting unit and a light receiving unit of the laser radar sensor are provided. A nozzle for ejecting high-pressure air to form an air curtain is provided on the front surface, the nozzle is connected to a surge tank via an electromagnetic solenoid valve, and the electromagnetic solenoid valve is connected to a hand switch in a cab.
［作用］ 上記のように構成された自動車の追突警報装置におい
て、必要なときに手元スイッチをＯＮすると、電磁ソレ
ノイドバルブが開きサージタンクのエアがノズルから噴
出してレーザ・レーダセンサの前面透明部材の前面にエ
アカーテンが形成される。したがって、雨滴、泥、雪片
等はエアカーテンに妨げられ、前面透明部材へ付着する
のが防止される。[Operation] In the vehicle rear-end collision warning device configured as described above, when the hand switch is turned on when necessary, the electromagnetic solenoid valve is opened and the air in the surge tank is ejected from the nozzle, and the front transparent member of the laser radar sensor is opened. An air curtain is formed on the front surface of the. Therefore, raindrops, mud, snowflakes, etc. are blocked by the air curtain and prevented from adhering to the front transparent member.
［実施例］ 以下図面を参照して本考案の実施例を説明する。第１図
および第２図において、レーザ・レーダセンサ１０のケ
ース１１の前面には、透過率の高い前面ガラス１２が設
けられている。そのケース１１の前面ガラス１２の上縁
には、エアチューブ１３がブラケット１５、１５により
取付けられており、このエアチューブ１３には下方に向
けて複数個（図示の例では５個）のノズル１４が設けら
れている。そして、ノズル１４から噴出したエアによ
り、前面ガラス１２の直前に若干前下方に傾いたエアカ
ーテン１６を形成するようになっている。[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, a front glass 12 having a high transmittance is provided on the front surface of the case 11 of the laser radar sensor 10. An air tube 13 is attached to the upper edge of the front glass 12 of the case 11 by brackets 15 and 15, and a plurality of nozzles 14 (five in the illustrated example) are attached to the air tube 13 downward. Is provided. The air ejected from the nozzle 14 forms an air curtain 16 that is slightly inclined forward and downward just before the front glass 12.
そのエアチューブ１３は、電磁ソレノイドバルブ１７、
減圧タンク１８および減圧バルブ１９を介してサージタ
ンク２０に接続され、このサージタンク２０はエアパイ
プ２１を介してエンジン側のコンプレッサ２２に接続さ
れている。The air tube 13 is an electromagnetic solenoid valve 17,
The surge tank 20 is connected via a pressure reducing tank 18 and a pressure reducing valve 19, and the surge tank 20 is connected to an engine side compressor 22 via an air pipe 21.
他方、電磁ソレノイドバルブ１７の図示しない電磁ソレ
ノイドは、電気配線２３、２４によりバッテリ２５に接
続され、一方の電気配線２３には図示しないキャブ内の
ドライバシート付近に設けられた手元スイッチ２６が介
装されている。On the other hand, the electromagnetic solenoid (not shown) of the electromagnetic solenoid valve 17 is connected to the battery 25 by electric wires 23, 24, and one electric wire 23 is provided with a hand switch 26 provided near the driver seat in the cab (not shown). Has been done.
したがって必要時に手元スイッチ２６を閉じると、電磁
ソレノイドバルブ１７が開き、サージタンク２０のエア
は、減圧バルブ１９、減圧タンク１８で減圧され、ノズ
ル１４から噴出して前面ガラス１２の直前に若干前下方
に傾いたエアカーテン１６を形成する。このエアカーテ
ン１６の傾きは、走行風に抵抗するように適宜決めるの
が好ましいが、この向きは任意であり、真下でもよく、
または前面ガラスに向けてもよい。Therefore, when the hand switch 26 is closed when necessary, the electromagnetic solenoid valve 17 is opened, and the air in the surge tank 20 is decompressed by the decompression valve 19 and the decompression tank 18, ejected from the nozzle 14 and slightly forward and downward just before the front glass 12. The air curtain 16 inclined to the side is formed. The inclination of the air curtain 16 is preferably determined as appropriate so as to resist the running wind, but this direction is arbitrary and may be right below.
Alternatively, it may face the front glass.
その結果、前方より飛来する雨滴、泥、雪片等はエアカ
ーテン１６に妨げられ、前面ガラス１２に付着すること
が防止される。As a result, raindrops, mud, snowflakes and the like flying from the front are obstructed by the air curtain 16 and prevented from adhering to the windshield 12.
［考案の効果］ 本考案は、以上説明したように構成されているので、エ
アカーテンにより雨滴、泥、雪片等がレーザ・レーダセ
ンサの前面ガラスに付着するのを防止し、前面ガラスの
透過率の低下を防ぎ、レーザ・レーダセンサの機能を確
保することができる。その結果、悪天候でもセンサの直
視距離の約８０％を確保し、追突警報の効果を奏するこ
とができる。[Advantages of the Invention] Since the present invention is configured as described above, rain drops, mud, snowflakes, etc. are prevented from adhering to the front glass of the laser radar sensor by the air curtain, and the transmittance of the front glass is reduced. Can be prevented and the function of the laser radar sensor can be secured. As a result, even in bad weather, about 80% of the direct viewing distance of the sensor can be secured, and the effect of a rear-end collision warning can be achieved.
第１図は本考案の一実施例を示す上面図、第２図は第１
図のＩ矢視図、第３図、第４図、第５図および第６図は
本考案が実施される追突警報装置の全体構成図、制御ブ
ロック図、作動説明図および制御ブロック図である。 １０……レーザ・レーダセンサ、１１……前面ガラス、
１３……エアチューブ、１４……ノズル、１６……エア
カーテン、１７……電磁ソレノイドバルブ、２０……サ
ージタンク、２６……手元スイッチ。FIG. 1 is a top view showing an embodiment of the present invention, and FIG.
FIG. 1, FIG. 3, FIG. 4, FIG. 5, and FIG. 6 of the drawing are an overall configuration diagram, a control block diagram, an operation explanatory diagram, and a control block diagram of a rear-end collision warning device in which the present invention is implemented. . 10 ... Laser radar sensor, 11 ... Front glass,
13 ... Air tube, 14 ... Nozzle, 16 ... Air curtain, 17 ... Electromagnetic solenoid valve, 20 ... Surge tank, 26 ... Hand switch.
Claims (1)
らなる距離検出手段と、該両手段からの信号に基づき安
全車間距離を計算する制動距離検出手段と、該手段と前
記距離検出手段からの信号に基づき警報の発生を判定す
る警報発生判定手段と、警報装置とを備えた自動車の追
突警報装置において、前記レーザ・レーダセンサの発光
部および受光部の前面に高圧空気を噴出してエアカーテ
ンを形成するノズルを設け、該ノズルを電磁ソレノイド
バルブを介してサージタンクに接続し、該電磁ソレノイ
ドバルブをキャブ内の手元スイッチに接続したことを特
徴とする自動車の追突警報装置。1. A vehicle speed detecting means, a distance detecting means composed of a laser radar sensor, a braking distance detecting means for calculating a safe inter-vehicle distance based on signals from the both means, and a braking distance detecting means from the means and the distance detecting means. In a rear-end collision warning device for an automobile, which is provided with a warning occurrence judgment means for judging the occurrence of a warning based on a signal, and a warning device, an air curtain by ejecting high-pressure air to the front surface of the light emitting portion and the light receiving portion of the laser radar sensor. A rear-end collision warning device for an automobile, comprising: a nozzle for forming a valve, the nozzle being connected to a surge tank via an electromagnetic solenoid valve, and the electromagnetic solenoid valve being connected to a hand switch in a cab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8587988U JPH069920Y2 (en) | 1988-06-30 | 1988-06-30 | Rear-end collision warning system for automobiles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8587988U JPH069920Y2 (en) | 1988-06-30 | 1988-06-30 | Rear-end collision warning system for automobiles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH027155U JPH027155U (en) | 1990-01-17 |
| JPH069920Y2 true JPH069920Y2 (en) | 1994-03-16 |
Family
ID=31310532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8587988U Expired - Lifetime JPH069920Y2 (en) | 1988-06-30 | 1988-06-30 | Rear-end collision warning system for automobiles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH069920Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19618922A1 (en) * | 1995-05-11 | 1996-11-14 | Hitachi Ltd | Vehicle distance measuring system for motor vehicles with communication unit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006194639A (en) * | 2005-01-11 | 2006-07-27 | Denso Corp | Radar equipment |
-
1988
- 1988-06-30 JP JP8587988U patent/JPH069920Y2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19618922A1 (en) * | 1995-05-11 | 1996-11-14 | Hitachi Ltd | Vehicle distance measuring system for motor vehicles with communication unit |
| US5675518A (en) * | 1995-05-11 | 1997-10-07 | Hitachi, Ltd. | Inter-vehicle distance measuring apparatus and method for automotive |
| DE19618922C2 (en) * | 1995-05-11 | 2001-05-23 | Hitachi Ltd | Device and method for measuring the vehicle distance for motor vehicles |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH027155U (en) | 1990-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7375620B2 (en) | Speed-sensitive rear obstacle detection and avoidance system | |
| JP3755248B2 (en) | In-vehicle display device | |
| US20200391702A1 (en) | Vehicle cleaning system | |
| JPH1096776A (en) | Display device for inter vehicle distance | |
| JPH1145398A (en) | Own lane object detecting device and vehicle traveling control device provided with the same | |
| JPH05174296A (en) | Inter-vehicle distance detection and alarm device | |
| JP7236800B2 (en) | vehicle wash system | |
| JPH079661U (en) | Rear-end collision warning system for automobiles | |
| JP2007038954A (en) | Vehicle surrounding alarm device | |
| JPH03263199A (en) | Vehicle-to-vehicle distance display device | |
| CN111722230B (en) | A method and system for monitoring blind spots in a full-speed area | |
| JP3677965B2 (en) | Rear collision warning device for vehicles | |
| JPH08184675A (en) | Inter-vehicle distance alarm device | |
| JP2959255B2 (en) | Inter-vehicle distance detection and alarm device | |
| JPH05225498A (en) | Inter-vehicle distance detection / warning device | |
| JPH04213200A (en) | Distance between cars detection/alarm device | |
| JP2697442B2 (en) | Inter-vehicle distance detection and alarm device | |
| JP2591416Y2 (en) | Inter-vehicle distance detection and alarm device | |
| JPH04201642A (en) | Between-vehicle distance detecting alarm device | |
| JP2555808Y2 (en) | Work vehicle rear monitoring device | |
| JPH06191361A (en) | Inter-vehicle distance warning system | |
| JP2748286B2 (en) | Inter-vehicle distance detection and alarm device | |
| JPH04213800A (en) | Detecting/alarming device for distance between cars | |
| JP2704979B2 (en) | Rear-end collision warning system for automobiles | |
| JPH05196720A (en) | Optical axis adjustment device for laser radar in inter-vehicle distance detection / warning device |