JPH0466698U

JPH0466698U -

Info

Publication number: JPH0466698U
Application number: JP10674790U
Authority: JP
Priority date: 1990-10-11
Filing date: 1990-10-11
Publication date: 1992-06-12

Description

[Brief explanation of drawings]

第１図は本考案の一実施例に係る後方追突警報
装置を搭載した自車の走行状態を示す説明図、第
２図は第１図に示す後方追突警報装置の構成図、
第３図は本考案の一実施例に係る後方追突警報装
置を搭載した自車の後部正面図、第４図は自車速
が所定値以上の場合に於ける安全車間距離を示す
グラフ、第５図は自車速が所定値に達しない場合
の安全車間距離を示すグラフ、第６図は本実施例
に係る後方追突警報装置の作用を示すフローチヤ
ート、第７図は注意喚起手段の他の実施例を示す
自車の後部正面図である。１……自車、５……車速センサ、７……情報処
理回路、９……実車間距離計算手段、１１……自
車速計算手段、１３……相対速度計算手段、１５
……後方車両速度計算手段、１７……安全車間距
離計算手段、１９……警報判定手段、２５……レ
ーザレーダヘツド、２７……後方車両、３７……
注意喚起手段、３９……表示手段、４１……後部
表示灯、４３……反射板、４５……タイマ作動判
定手段、４７……タイマ。 FIG. 1 is an explanatory diagram showing the running state of a vehicle equipped with a rear-end collision warning system according to an embodiment of the present invention, and FIG. 2 is a configuration diagram of the rear-end collision warning system shown in FIG. 1.
Fig. 3 is a rear front view of a vehicle equipped with a rear-end collision warning system according to an embodiment of the present invention; Fig. 4 is a graph showing the safe inter-vehicle distance when the vehicle speed is above a predetermined value; Figure 6 is a graph showing the safe inter-vehicle distance when the own vehicle speed does not reach a predetermined value, Figure 6 is a flowchart showing the operation of the rear collision warning system according to this embodiment, and Figure 7 is another implementation of the attention calling means. It is a rear front view of the own vehicle which shows an example. DESCRIPTION OF SYMBOLS 1... Own vehicle, 5... Vehicle speed sensor, 7... Information processing circuit, 9... Actual inter-vehicle distance calculation means, 11... Own vehicle speed calculation means, 13... Relative speed calculation means, 15
... Rear vehicle speed calculation means, 17 ... Safe inter-vehicle distance calculation means, 19 ... Alarm determination means, 25 ... Laser radar head, 27 ... Rear vehicle, 37 ...
Attention calling means, 39...display means, 41...rear indicator light, 43...reflection plate, 45...timer operation determination means, 47...timer.

Claims

[Scope of Claim for Utility Model Registration] (1) Calculate the safe following distance from the actual distance to the vehicle behind as determined by the laser radar and the own vehicle speed as determined by the vehicle speed sensor, and compare the actual distance between the vehicles with the above-mentioned safe distance. In a rear-end collision warning system for a vehicle that issues a warning when the actual inter-vehicle distance is shorter than the safe inter-vehicle distance to call attention to the vehicle behind, when the own vehicle's speed is greater than a predetermined value, the safe inter-vehicle distance is calculated as the actual measured value of the rear vehicle speed. When the own vehicle speed does not reach the predetermined value, the rear vehicle speed for calculating the safe inter-vehicle distance is calculated using the formula: Rear vehicle speed (Km/h) = Own vehicle speed (Km/h) x coefficient + constant ( A rear-end collision warning system for a vehicle, characterized in that it is equipped with a means for calculating a safe inter-vehicle distance using the formula (Km/h). (2) A warning is issued when the own vehicle speed does not reach a predetermined value.
It is characterized in that it is performed the first time it is detected that the actual inter-vehicle distance is shorter than the safe inter-vehicle distance, and when the own vehicle speed is above a predetermined value, it is performed when the actual inter-vehicle distance is detected to be shorter than the safe inter-vehicle distance three times in a row. A rear collision warning system for a vehicle according to claim 1.