PROBLEM TO BE SOLVED: To solve the problem of a case in which, while a work vehicle is travelling on a road, a following vehicle with a speed difference approaches and overtakes while presence of the following vehicle is not perceived.SOLUTION: A rear direction is photographed with two cameras 12, 13 provided at a rear part of a travelling machine body, and a following vehicle is recognized through an image processing. The images of the two cameras 12, 13 are smaller as they are far away and being imaged on a center side, and become larger as they approach, being inside along lateral width direction of the two cameras. Approaching of a following vehicle is determined based on time variation of the two images and an operator is notified of the fact.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2016,JPO&INPIT【課題】作業車両の路上走行時、速度差のある後続車両が接近して、追い抜くことがあるが、後続車両を気付かないことがある。【解決手段】走行機体の後部に設けた2個のカメラ12,13により後方を撮影して、後続車両を画像処理により認識する。2個のカメラ12,13の映像は、遠くにある程小さく、かつ中央側に写り、近づくと、大きくなり、かつ2個のカメラの左右幅方向内側になる。上記2個の映像の時間変化により後続車両の接近具合を判断して、オペレータに報知する。【選択図】図3
