| 摘要 |
<p>PURPOSE:To securely detect a precedent vehicle even during a run on a curved road by detecting the precedent vehicle on condition that the steering angle when the precedent vehicle runs at the current position of a following vehicle is equal to the current steering angle of the following vehicle. CONSTITUTION:A vehicle speed (v) and a steering angle delta detected by a vehicle speed sensor 12 and a steering angle sensor 14 are supplied to a processing circuit 16. A radar device 10 is equipped with a light transmitter 24 which emits a vertically flat radar beam 102 to in front of a vehicle in its running direction and a light receiver 26 which receives its reflected wave 104. The light transmitter 24 obtains the pulsating laser beam 102 synchronized with the clock signal of a clock generator 28 and the light reception signal of the light receiver 26 is supplied to a distance detecting circuit 32 through an amplifier 30. The circuit 32 finds the distance to a body present in front of the vehicle from the delay time from the input of the clock signal of the generator 28 to the input of the light reception signal of the light receiver 26. A scanning device 34 scans the beam 102 of the light transmitter 24 in a horizontal plane in the width direction of the vehicle and supplies its scanning angle to the circuit 16 as the azimuth of the body which is present in the running direction to the this vehicle.</p> |
