| 摘要 |
<p>PROBLEM TO BE SOLVED: To properly exclude snow and dust from a radar device for detecting an object position in a measuring area by using a laser radar. SOLUTION: A laser beam is swept in theθdirection in the measuring area, the distance r up to an object in respectiveθpositions from the reflected light is measured, and r(θ) of an r-θpolar coordinate surface is determined. The r(θ) is processed by and adaptive rank filter, re(θ) is calculated, and this is used as object position information on the measuring area. That is, r-θpolar coordinates are transformed into r-l coordinates by l=∫0θrdθ, and in the r-l coordinates, respective l are processed by a median filter of±ΔL of both side ranges with these as a center position, and the output r is used as distance information up to the object inθof inverse conversion of the l.</p> |
