| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce combining process (pairing process) quantity of the beat frequency at the time of a frequency ascent and the beat frequency at the time of a frequency descent, to reduce erroneous pairing and to improve the processing efficiency of distance and relative speed calculations by removing the peak spectrum of the beat signal generated by the reflected signal from a continuous road side object (guardrail, soundproof wall, wire netting). SOLUTION: A continuous road side object process section 10 groups the peaks having the interval of peak frequencies within the continuous road side object judging peak frequency difference set in advance (e.g. frequency difference corresponding to the distance 10 (m)) when many peaks are detected on the peak spectrum of the beat signal in one beam radiation direction. The continuous road side object process section 10 refers to the peak spectrum in the adjacent beam radiation direction, excludes a peak from the group when the peak related to a preceding vehicle is included in the group, and deletes other peak data.</p> |
