REMOTE SENSING APPARATUS AND FREQUENCY ANALYSIS METHOD OF THE SAME

摘要

PROBLEM TO BE SOLVED: To heighten accuracy in frequency resolution without lengthening sampling times. SOLUTION: Laser reflection light chopped by an optical pattern plate from an object to be measured is received. Its reception signal is converted into a signal in a frequency region to analyze a frequency component at prescribed sampling times. As an analytical technique, carrier frequency candidate values are determined through the use of the relational expression frc=frs×nd(wherein, the rotational frequency of the optical pattern plate is frs; the carrier frequency generated by the chopping of light by rotation is frc; and the number of divisions (a pair of integral values) of patterns of transmission/non transmission formed in the optical pattern plate 11 is nd) (S12). Each candidate value is evaluated to select the most provable carrier frequency, and the relational expression frs=frc/ndis used to determine the rotational frequency (S14). COPYRIGHT: (C)2005,JPO&NCIPI