| 摘要 |
PROBLEM TO BE SOLVED: To provide a distance-measuring device, a distance-measuring method, and a distance-measuring program, which can precisely perform measurement down to short distance, even in a narrow emission frequency band. SOLUTION: A generation part 12 outputs a signal, having a prescribed transmission frequency f by a frequency control part 14. A transmission part 20 emits electromagnetic waves, having the same frequency f as that of the output signal of the generation part 12 in the measurement axis (x-axis) direction. A detection part 30 includes a plurality of detectors, which are disposed at a plurality of observation points (x=0, x<SB>1</SB>, x<SB>2</SB>) on the x-axis, respectively. Respective detectors detect the receiving power signals p (f, 0), p (f, x<SB>1</SB>), and p (f, x<SB>2</SB>) of a standing wave S at the corresponding observation points. An analysis signal generating part 42 extracts constant components, amplitude variation components, and phase variation components from the received power signals p (f, 0), p (f, x<SB>1</SB>), and p (f, x<SB>2</SB>) and generates analysis signal. A Fourier transformation part 44 performs the Fourier transform of the analysis signal for calculating a profile P (x) and obtains the distance of up to the object to be measured. COPYRIGHT: (C)2006,JPO&NCIPI
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