| 摘要 |
PROBLEM TO BE SOLVED: To suppress increase in costs in the range measurement when the distance to an object to be measured is short. SOLUTION: The range finder is provided with: a signal generation means generating a first signal having a repetition period T1 in synchronization with a measurement signal and a second signal having a repetition period T2 in synchronization with a reflection signal; a phase difference detection means detecting the phase difference between the first signal and the second signal; a count means counting the number of repetitions of the first signal or the second signal; and a calculation means calculating the transmission/reception timeΔT on the basis of the number n of repetitions until the first signal and the second signal have the same phase, the repetition period T1 of the first signal, the repetition period T2 of the second signal, and the transmission/reception timeΔT and acquiring the distance to the object to be measured on the basis of the transmission/reception timeΔT. COPYRIGHT: (C)2007,JPO&INPIT
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