JPH0840159A - Device for preventing rear end collision - Google Patents

Device for preventing rear end collision

Info

Publication number
JPH0840159A
JPH0840159A JP17507594A JP17507594A JPH0840159A JP H0840159 A JPH0840159 A JP H0840159A JP 17507594 A JP17507594 A JP 17507594A JP 17507594 A JP17507594 A JP 17507594A JP H0840159 A JPH0840159 A JP H0840159A
Authority
JP
Japan
Prior art keywords
vehicle
speed
camera
speed information
end collision
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.)
Withdrawn
Application number
JP17507594A
Other languages
Japanese (ja)
Inventor
Hidenobu Korenaga
英伸 是永
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.)
Yazaki Corp
Original Assignee
Yazaki 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 Yazaki Corp filed Critical Yazaki Corp
Priority to JP17507594A priority Critical patent/JPH0840159A/en
Publication of JPH0840159A publication Critical patent/JPH0840159A/en
Withdrawn legal-status Critical Current

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  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Traffic Control Systems (AREA)

Abstract

PURPOSE:To provide an inexpensive rear end collision preventing device with a simple constitution by comparing the speed of a vehicle in front extracted from the signal photographed by a camera to photograph the lighting output of a speed information lighting means of the vehicle in front with the vehicle speed, and dispatching an alarm when a danger is judged. CONSTITUTION:A speed information lighting means 1 achieves the lighting corresponding to the information of each digit of the vehicle speed which is expressed in binary, and transmits the output to a vehicle behind. A camera 2 photographs the lighting output from the speed information lighting means 1 of a vehicle in the front. A speed extracting means 3 extracts the speed of the vehicle in the front from the photographed signal, and the speed of the vehicle in the front is compared with that of the vehicle by a comparing and judging means 4 to judge if or not dangerous. If dangerous, the alarm is dispatched by an alarming means 6. The speed information lighting means 1 is simplified by making common use with a high mount stop lamp. A camera 2 is provided with a band-pass filter to pass the light in the frequency band where the speed information lighting means 1 is lit for photographing to increase the S/N ratio of the speed information.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は前方車両との追突を予防
する追突予防装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear-end collision prevention device for preventing rear-end collision with a vehicle ahead.

【0002】[0002]

【従来の技術】前方車両との追突をさけるために運転者
は常に前方車両との車間距離を目測し、またブレーキラ
ンプの点灯に注意をはらって追突を防止している。しか
し、運転者の不注意でブレーキランプの点灯を見落す可
能性もあり、このためレーダによって前方車両との車間
距離を測定して、一定距離以下になった場合警報を発し
て追突を予防する追突予防装置がある。
2. Description of the Related Art In order to avoid a rear-end collision with a vehicle in front, the driver always measures the distance between the front-vehicle and the front vehicle and pays attention to the lighting of a brake lamp to prevent the rear-end collision. However, there is a possibility that the driver may overlook the lighting of the brake lamp, so the distance between the vehicle and the vehicle ahead is measured by the radar, and if the distance is less than a certain distance, an alarm is issued to prevent a rear-end collision. There is a collision prevention device.

【0003】[0003]

【発明が解決しようとする課題】前述したように、従来
の追突予防装置では前方車両との距離をレーダによって
測定し、一定距離以下のとき警報を発するようにしてい
た。しかし、このようなレーダを使用する装置は、装置
構成が複雑であり、かつ高価であった。
As described above, in the conventional rear-end collision prevention device, the distance to the vehicle in front is measured by a radar and an alarm is issued when the distance is less than a certain distance. However, a device using such a radar has a complicated device configuration and is expensive.

【0004】本発明は簡易な構成で、かつ安価な追突予
防装置を提供することを目的とする。
An object of the present invention is to provide an inexpensive rear-end collision prevention device having a simple structure.

【0005】[0005]

【課題を解決するための手段】前述した課題を解決する
ために本発明が採用した手段を図1を参照して説明す
る。図1は本発明の基本構成図である。前方に走行中の
車両との追突を予防する追突予防装置であって、2進数
で表わした自車速度の各ケタの情報を発光させて後方車
両に送出する速度情報発光手段1と、前方車両の前記速
度情報発光手段1よりの発光出力を撮像するカメラ2
と、前記カメラ2で撮像した信号より速度値を抽出する
速度値抽出手段3と、前記速度値抽出手段3より抽出さ
れた前方車両の速度と自車両の速度とを比較して危険で
あるか否を判定する比較判定手段4と、前記比較判定手
段4で危険と判定されたとき警報を発する警報手段5
と、を備える。
Means adopted by the present invention for solving the above-mentioned problems will be described with reference to FIG. FIG. 1 is a basic configuration diagram of the present invention. A rear-end collision prevention device for preventing a rear-end collision with a vehicle traveling forward, which is speed information emitting means 1 for emitting information of each digit of the vehicle speed represented by a binary number to a rear vehicle, and a front vehicle. A camera 2 for imaging the light emission output from the speed information light emitting means 1
Then, is it dangerous to compare the speed value extracting means 3 for extracting a speed value from the signal picked up by the camera 2 with the speed of the preceding vehicle and the speed of the own vehicle extracted by the speed value extracting means 3? Comparison judging means 4 for judging whether or not there is a warning, and warning means 5 for issuing a warning when the comparison judgment means 4 judges a danger.
And

【0006】また、前記速度情報発光手段1をハイマウ
ントストップランプと共用する。また、前記カメラ2は
前記速度情報発光手段1が発光する周波数帯の光を通過
する帯域フィルタを介して撮像するようにする。また、
前記カメラ2のレンズがシリンドリカルレンズであるよ
うにする。
The speed information light emitting means 1 is also used as a high mount stop lamp. Further, the camera 2 captures an image through a bandpass filter that passes light in the frequency band emitted by the speed information light emitting means 1. Also,
The lens of the camera 2 is a cylindrical lens.

【0007】[0007]

【作用】速度情報点灯手段1は、2進数で表わした自車
両の速度値の各ケタの1または0の情報に対応させて点
灯して後方車両に送出する。カメラ2は、前方を走行中
の車両の速度情報点灯手段1より送出される点灯出力を
撮像する。
The speed information lighting means 1 lights in response to the information of 1 or 0 of each digit of the speed value of the own vehicle represented by a binary number and sends it to the rear vehicle. The camera 2 images the lighting output transmitted from the speed information lighting means 1 of the vehicle traveling ahead.

【0008】速度値抽出手段3は、カメラ2で撮像され
た信号より前方車両の速度値を抽出する。比較判定手段
4は、速度値抽出手段3で抽出された前方車両の速度と
自車両の速度を比較して危険であるか否かを判定する。
The speed value extracting means 3 extracts the speed value of the vehicle ahead from the signal imaged by the camera 2. The comparison / determination means 4 compares the speed of the preceding vehicle extracted by the speed value extraction means 3 with the speed of the host vehicle to determine whether or not there is a danger.

【0009】警報手段6は危険であると判定されたとき
警報を発して運転者に知らせる。また、前記速度情報点
灯手段1をハイマウントストップランプと共用させる。
また、カメラ1には速度情報点灯手段1が発光する周波
数帯の光を通過させる帯域フィルタを付けて撮像する。
The alarm means 6 gives an alarm to notify the driver when it is judged to be dangerous. The speed information lighting means 1 is also used as a high mount stop lamp.
Further, the camera 1 is attached with a bandpass filter that allows the light in the frequency band emitted by the speed information lighting means 1 to pass therethrough for imaging.

【0010】また、カメラ1のレンズをシリンドリカル
レンズにする。以上のように、前方車両よりの光によっ
て転送された前方車両速度と自車両の速度とを比較して
危険があると判定されたとき警報を発するようにしたの
で装置構成が簡単となり、かつ安価となる。
Further, the lens of the camera 1 is a cylindrical lens. As described above, since the warning is issued when it is determined that there is a danger by comparing the speed of the front vehicle transferred by the light from the front vehicle and the speed of the own vehicle, the device configuration is simple and inexpensive. Becomes

【0011】また、自車両の速度を後方車両に転送する
ための点灯手段を、車両に取付けられたハイマウントス
トップランプと共用するようにしたので、装置構成が更
に簡易化できる。また、カメラを速度情報を点灯させる
光の発光周波数帯を通過させるフィルタを介して撮像す
るようにしたので、速度情報のS/N比を高くすること
ができる。
Further, since the lighting means for transferring the speed of the host vehicle to the rear vehicle is also used as the high mount stop lamp mounted on the vehicle, the device structure can be further simplified. Further, since the camera is configured to capture an image through a filter that passes the light emission frequency band of the light for turning on the speed information, the S / N ratio of the speed information can be increased.

【0012】また、カメラのレンズをシリンドリカルレ
ンズを用いるようにしたので、カメラで撮像した信号よ
りの速度情報の抽出を容易に行なうことができる。
Since the lens of the camera is a cylindrical lens, the speed information can be easily extracted from the signal picked up by the camera.

【0013】[0013]

【実施例】本発明の一実施例を図2および3を参照して
説明する。図2は本発明の実施例の構成図、図3は同実
施例の動作フローチャートである。図2において、11
はカメラ、12は帯域フィルタ、13は速度算出部、1
4は発光駆動部、15は速度情報発光部、16は速度値
抽出部、17は比較判定部、18は警報部、19は制御
部、20〜22はインタフェース(I/O)、23は処
理を実行するプロセッサ(CPU)である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. 2 is a block diagram of the embodiment of the present invention, and FIG. 3 is an operation flowchart of the embodiment. In FIG. 2, 11
Is a camera, 12 is a bandpass filter, 13 is a speed calculation unit, 1
4 is a light emission drive unit, 15 is a speed information light emission unit, 16 is a speed value extraction unit, 17 is a comparison determination unit, 18 is an alarm unit, 19 is a control unit, 20 to 22 are interfaces (I / O), and 23 is a process. Is a processor (CPU) that executes.

【0014】速度情報発光部15は車両後方に設置さ
れ、自車両の2進数で表わした速度値情報を発光して後
方車両につたえる。カメラ11は前方車両に設置されて
いる速度情報発光部15の発光を撮像する。
The speed information light emitting unit 15 is installed at the rear of the vehicle and emits speed value information represented by the binary number of the host vehicle to the rear vehicle. The camera 11 images the light emission of the speed information light emitting unit 15 installed in the vehicle ahead.

【0015】また、帯域フィルタ12は速度情報発光部
15が発光する光の周波数帯を通過してカメラ11で撮
像される信号のS/Nを高くする。つぎに、図3を参照
して実施例の動作を説明する。処理S1では、速度算出
部13は、I/O20を介して入力される走行センサよ
りの信号より自車両の速度値を算出する。
Further, the bandpass filter 12 increases the S / N ratio of the signal picked up by the camera 11 by passing through the frequency band of the light emitted by the speed information light emitting section 15. Next, the operation of the embodiment will be described with reference to FIG. In process S1, the speed calculation unit 13 calculates the speed value of the host vehicle from the signal from the travel sensor input via the I / O 20.

【0016】処理S2では、発光駆動部14は、I/O
20を介して運転者がブレーキを掛けたか否かを判定す
る。すなわち、ストップランプが点灯したか否かを判定
して、判定がNOの場合は処理S4に移る。処理S3で
は、発光駆動部14は、処理S1で算出した自車両の速
度値を2進数に対応させて、各ケタの1または0の情報
を速度情報発光部15に指令して発光させる。
In step S2, the light emission drive unit 14 causes the I / O
It is determined via 20 whether the driver has applied the brakes. That is, it is determined whether or not the stop lamp is lit, and if the determination is NO, the process proceeds to step S4. In process S3, the light emission drive unit 14 associates the speed value of the vehicle calculated in process S1 with a binary number, and instructs the speed information light emission unit 15 to emit information of 1 or 0 of each digit to emit light.

【0017】図4は速度情報発光部15の具体例であ
る。図4(A)において、0〜15はほぼ等間隔に配置
された高輝度発光ダイオード(LED)である。速度を
kmで表わし、60kmを2進数8ケタで表わすと(0
0111010)となる。
FIG. 4 shows a specific example of the speed information light emitting section 15. In FIG. 4A, 0 to 15 are high-intensity light emitting diodes (LEDs) arranged at substantially equal intervals. Expressing speed in km and 60 km in binary 8 digits (0
0111010).

【0018】そこで、図4(B)では、4〜11で示す
発光ダイオードを2進数の各ケタに対応させ、ケタの値
が1のときは発光させ、0のときは発光させない。ま
た、速度値にかかわらず0,3,12および15のLE
Dは発光させ、1,2,13および14は速度値にかか
わらず発光させない。
Therefore, in FIG. 4 (B), the light emitting diodes 4 to 11 are made to correspond to each digit of the binary number. When the digit value is 1, the light is emitted, and when the digit value is 0, the light is not emitted. In addition, LEs of 0, 3, 12 and 15 are irrespective of the speed value.
D emits light, and 1, 2, 13 and 14 do not emit light regardless of the speed value.

【0019】このように、速度値の両側を固定的に発光
させることにより、容易に速度値を見つけ出すことがで
きる。また図4(C)は、発光ダイオード全体をON/
OFFさせるもので、図4(A)の発光ダイオード位置
に対応させて時間的に分割して発光させる。
In this way, the speed value can be easily found by making both sides of the speed value emit light in a fixed manner. Further, in FIG. 4C, the entire light emitting diode is turned ON /
The light is turned off, and the light is divided and emitted in time corresponding to the position of the light emitting diode in FIG.

【0020】すなわち、例えば最初に8回オンオフを繰
返して11111111を発光させて多重信号のフレー
ム信号とし、このフレーム信号に続く8ビットを速度値
に対応させた00111010を発光させ、この001
11010を読み取ることにより速度信号を容易に抽出
できる。
That is, for example, the on / off operation is repeated eight times at first to make 11111111 emit light to become a frame signal of a multiplex signal, and 00111010 corresponding to 8 bits following this frame signal is made to emit light, and this 001
The speed signal can be easily extracted by reading 11010.

【0021】処理S4では、制御部19は、カメラ11
で撮像された信号を読込む。処理S5では、速度値抽出
部16は、処理S4で読込んだ撮像信号より前方車両の
速度値VF を抽出する。図5はカメラ11の具体例を示
したものであり、11Aはトロイダルレンズ、11Bは
CCD撮像素子である。
In step S4, the control unit 19 controls the camera 11
Read the signal imaged in. In process S5, the speed value extraction unit 16 extracts the speed value V F of the vehicle ahead from the image pickup signal read in process S4. FIG. 5 shows a specific example of the camera 11, in which 11A is a toroidal lens and 11B is a CCD image pickup device.

【0022】このようにトロイダルレンズを使用するこ
とによって、LEDの撮像面(CCD11B)の結像は
イメージラインとして表わる。また、図5で点線で示す
ように、LEDが上下に移動してもイメージラインの位
置は変化しない。
By using the toroidal lens in this way, the image formation on the image pickup surface (CCD 11B) of the LED appears as an image line. Further, as shown by the dotted line in FIG. 5, the position of the image line does not change even if the LED moves up and down.

【0023】したがって、このようなトロイダルレンズ
を使用することによってカメラで撮像した信号より速度
値を抽出するのに1次元の処理のみで良く、処理時間を
短縮することができる。なお、このようなトロイダルレ
ンズを使用した場合は、速度情報発光部15を設置した
位置の上下には同一色を発光するランプ等がないように
する。
Therefore, by using such a toroidal lens, only one-dimensional processing is required to extract the velocity value from the signal imaged by the camera, and the processing time can be shortened. When such a toroidal lens is used, there should be no lamp or the like that emits the same color above and below the position where the speed information light emitting unit 15 is installed.

【0024】処理S6では、比較判定部17は、処理S
1で算出した自車速度Vと処理S5で抽出した前方車両
の速度VF との差が0より大か否かを判定し、判定がN
Oの場合は処理S1に移り、YESの場合は処理S7に
移って警報部18のウォーニングランプを点灯して前方
車両に接近中であることを警告する。
In process S6, the comparison / determination unit 17 performs process S6.
It is determined whether the difference between the vehicle speed V calculated in 1 and the vehicle speed V F extracted in step S5 is greater than 0, and the determination is N.
If it is O, the process proceeds to step S1, and if it is YES, the process proceeds to step S7 to turn on the warning lamp of the alarm unit 18 to warn that the vehicle ahead is approaching.

【0025】処理S7では、比較判定部17は、自車両
の速度Vと前方車両の速度VF との差が或る値V1 より
大か否かを判定し、判定がNOの場合は処理S1に移
り、YESの場合は処理S9に移って警報部18のブザ
ーを鳴動させて追突危険大を示す警告音を発する。
In step S7, the comparison and determination section 17 determines whether or not the difference between the speed V of the host vehicle and the speed V F of the vehicle ahead is greater than a certain value V 1 , and if the determination is NO, the processing is performed. If the result is YES, the process proceeds to step S9, and the buzzer of the alarm unit 18 is activated to emit a warning sound indicating a danger of a rear-end collision.

【0026】[0026]

【発明の効果】以上説明したように本発明によれば次の
効果が得られる。前方車両よりの光によって転送された
前方車両速度と自車両の速度とを比較して危険があると
判定されたとき警報を発するようにしたので装置構成が
簡単となり、かつ安価となる。
As described above, according to the present invention, the following effects can be obtained. Since the warning is issued when it is determined that there is a danger by comparing the speed of the front vehicle transferred by the light from the front vehicle and the speed of the own vehicle, the device configuration becomes simple and inexpensive.

【0027】また、自車両の速度を後方車両に転送する
ための点灯手段を、車両に取付けられたハイマウントス
トップランプと共用するようにしたので、装置構成が更
に簡易化できる。また、カメラを速度情報を点灯させる
光の発光周波数帯を通過させるフィルタを介して撮像す
るようにしたので、速度情報のS/N比を高くすること
ができる。
Further, since the lighting means for transferring the speed of the own vehicle to the rear vehicle is shared with the high mount stop lamp mounted on the vehicle, the device structure can be further simplified. Further, since the camera is configured to capture an image through a filter that passes the light emission frequency band of the light for turning on the speed information, the S / N ratio of the speed information can be increased.

【0028】また、カメラのレンズをシリンドリカルレ
ンズを用いるようにしたので、カメラで撮像した信号よ
りの速度情報の抽出を容易に行なうことができる。
Since the lens of the camera is a cylindrical lens, the speed information can be easily extracted from the signal imaged by the camera.

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

【図1】本発明の基本構成図である。FIG. 1 is a basic configuration diagram of the present invention.

【図2】本発明の実施例の説明図である。FIG. 2 is an explanatory diagram of an example of the present invention.

【図3】同実施例の動作フローチャートである。FIG. 3 is an operation flowchart of the same embodiment.

【図4】同実施例の速度情報発光部の具体例である。FIG. 4 is a specific example of a speed information light emitting unit of the same embodiment.

【図5】同実施例のカメラの具体例である。FIG. 5 is a specific example of the camera of the embodiment.

【符号の説明】[Explanation of symbols]

1 速度情報発光手段 2,11 カメラ 3 速度値抽出手段 4 比較判定手段 5 警報手段 11A トロイダルレンズ 11B CCD 12 帯域フィルタ 13 速度算出部 14 発光駆動部 15 速度情報発光部 16 速度値抽出部 17 比較判定部 18 警報部 19 制御部 20,21,22 インタフェース(I/O) 22 プロセッサ(CPU) 1 Velocity Information Emitting Means 2, 11 Camera 3 Velocity Value Extracting Means 4 Comparison Judging Means 5 Warning Means 11A Toroidal Lens 11B CCD 12 Bandpass Filter 13 Velocity Calculating Unit 14 Emission Driving Unit 15 Velocity Information Emitting Unit 16 Velocity Value Extracting Unit 17 Comparison Judgment Section 18 alarm section 19 control section 20, 21, 22 interface (I / O) 22 processor (CPU)

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 前方に走行中の車両との追突を予防する
追突予防装置であって、 2進数で表わした自車速度の各ケタの情報を発光させて
後方車両に送出する速度情報発光手段と、 前方車両の前記速度情報発光手段よりの発光出力を撮像
するカメラと、 前記カメラで撮像した信号より速度値を抽出する速度値
抽出手段と、 前記速度値抽出手段より抽出された前方車両の速度と自
車両の速度とを比較して危険であるか否を判定する比較
判定手段と、 前記比較判定手段で危険と判定されたとき警報を発する
警報手段と、を備えたことを特徴とする追突予防装置。
1. A rear-end collision prevention device for preventing a rear-end collision with a vehicle traveling forward, which is a speed information light emitting means for emitting information of each digit of the vehicle speed represented by a binary number to a rear vehicle. A camera that images the light emission output from the speed information light emitting means of the front vehicle, a speed value extraction means that extracts a speed value from the signal imaged by the camera, and a front vehicle extracted by the speed value extraction means. It is characterized by further comprising: a comparison determination means for comparing the speed of the vehicle with the speed of the host vehicle to determine whether the vehicle is dangerous, and an alarm means for issuing an alarm when the comparison determination means determines that the vehicle is dangerous. Rear-end collision prevention device.
【請求項2】 前記速度情報発光手段をハイマウントス
トップランプと共用したことを特徴とする請求項1記載
の追突予防装置。
2. The rear-end collision prevention device according to claim 1, wherein the speed information light emitting means is also used as a high mount stop lamp.
【請求項3】 前記カメラは前記速度情報発光手段が発
光する周波数帯の光を通過する帯域フィルタを介して撮
像するようにしたことを特徴とする請求項1または2記
載の追突予防装置。
3. The rear-end collision prevention device according to claim 1, wherein the camera captures an image through a bandpass filter that passes light in a frequency band emitted by the speed information light emitting means.
【請求項4】 前記カメラのレンズがシリンドリカルレ
ンズであることを特徴とした請求項1,2または3記載
の追突予防装置。
4. The rear-end collision prevention device according to claim 1, wherein the lens of the camera is a cylindrical lens.
JP17507594A 1994-07-27 1994-07-27 Device for preventing rear end collision Withdrawn JPH0840159A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17507594A JPH0840159A (en) 1994-07-27 1994-07-27 Device for preventing rear end collision

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17507594A JPH0840159A (en) 1994-07-27 1994-07-27 Device for preventing rear end collision

Publications (1)

Publication Number Publication Date
JPH0840159A true JPH0840159A (en) 1996-02-13

Family

ID=15989802

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17507594A Withdrawn JPH0840159A (en) 1994-07-27 1994-07-27 Device for preventing rear end collision

Country Status (1)

Country Link
JP (1) JPH0840159A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2447346A (en) * 2007-03-07 2008-09-10 Shih-Hsiung Li Variable brightness brake lights and sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2447346A (en) * 2007-03-07 2008-09-10 Shih-Hsiung Li Variable brightness brake lights and sensor

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