Patent ID: 11914021
Assignee: ALOUETTE TECHNOLOGY INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 10:
11. A velocity measurement method comprising:
transmitting a transmission signal by a transmitting antenna toward a measurement object;
receiving a reflected wave from the measurement object with a plurality of receiving antennas and generating a reception signal for each of the receiving antennas; and
obtaining a phase plane of the reflected wave with respect to an antenna plane of the plurality of receiving antennas from a phase difference between the reception signals to specify an arrival direction of the reflected wave, obtaining a distance to the measurement object from a propagation delay time of the reflected wave, calculating a phase fluctuation of the reflected wave to calculate a velocity of the measurement object from the phase fluctuation, and measuring a velocity of a vehicle running on a road as the velocity of the measurement object.