| 摘要 |
PURPOSE:To improve the measuring accuracy and at the same time to realize miniaturization and simplification for a laser radar device, by measuring the distance to a travelling object and the vertical speed of the travelling object at each time point by a signal processor in order to obtain a horizontal speed component. CONSTITUTION:The pulse tye laser light is irradiated to a travelling object 2 from a laser device 4, and this reflected light is led to a detector 9. At the same time, the output of a local oscillating laser device 10 is made incident to the detector 9 to perform heterodyne wave detection. Thus the distance R to the object 2 is obtained, and at the same time the vertical speed component of the object 2 is obtained from a beat frequency of the heterodyne wave detection output. It is possible to obtain through an operation the horizontal speed component Ve1 and the speed V0 of travelling direction of the object 2 by a signal processor 11 and from distances Rt1 and Rt2 between positions A and B of the object 2 at time points t1 and t2 respectively and a position O of an optical system 6a as well as a speed component t1 of vertical direction. |
