| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To accurately grasp the movement of a traveling object (especially, person) to be monitored, and to accurately predict the intrusion of the traveling object to the interior of a vehicle C even under such an environment that a disturbance frequency is present, in monitoring the traveling object positioned in the periphery of the installation location of a Doppler sensor 1 by using the Doppler sensor 1. <P>SOLUTION: In such a case that at least one band width excluding band width including the maximum frequency and minimum frequency in a predetermined frequency range among all band widths whose frequency levels are calculated on the basis of FFT analysis by an FFT analyzing part 13 is specific band width whose frequency level is a first set level or more, when the frequency levels of two band widths adjacent to the high side and low side of a frequency for the specific band width are the second set level which is lower than the first set level or lower, the frequency level of the specific band width is lowered by a disturbance frequency removing part 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
