DISTANCE MEASUREMENT SYSTEM, DISTANCE MEASUREMENT DEVICE, MEASURED DEVICE, AND POSITION DETECTION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a distance measurement system capable of accurately measuring a distance.SOLUTION: A distance measurement system includes: a detected device 2; and a distance measurement device for calculating a distance to the detected device 2. The detected device 2 includes a transmission part 6 for wirelessly transmitting a first signal having frequency fand a second signal having frequency fdifferent from the first signal by making their phases synchronize with each other. The distance measurement device includes: a reception part for receiving the first signal and the second signal; and an arithmetic part for calculating a phase difference between the received first signal and second signal, and for calculating a distance from the distance measurement device to the detected device 2 on the basis of the phase difference.SELECTED DRAWING: Figure 2