| 摘要 |
PROBLEM TO BE SOLVED: To detect displacement of an object with a simple configuration.SOLUTION: An object displacement detection apparatus which detects displacement of an object to be detected, on the basis of a transmission wave transmitted to the object and a reflection wave formed by the object reflecting the transmission wave includes: a transmitter-receiver circuit which generates a plurality of signals having different phases on the basis of the transmission wave and the reflection wave; and a displacement distance calculation apparatus which calculates a degree of deformation of a trajectory on an orthogonal coordinate of the signals generated by the transmitter-receiver circuit, determines a correction value of a predetermined phase angle of a trajectory with respect to a phase angle of the signals having a phase difference of 90 degrees, on the basis of the deformation degree, corrects the predetermined phase angle of the trajectory on the basis of the correction value, and calculates displacement of the object to be detected, on the basis of the predetermined corrected phase angle of the trajectory. |
