MEASUREMENT DEVICE, MEASUREMENT SYSTEM, AND MEASUREMENT METHOD

摘要

PROBLEM TO BE SOLVED: To provide a device, system and method for measurement, capable of precisely measuring the velocity of a moving body and a Doppler shifted reception angular frequency in a short time. SOLUTION: A receiver 3 receives an ultrasonic wave of a single-frequency beat signal output from a transmitter 2, performs quadrature detection of the received signal at least two different reference angular frequencies. The velocity or angular frequency when the difference in reception amplitude estimation values or reception power estimation values each calculated from the detection output based on each reference angular frequency when assuming a reception angular frequency is at target accuracy (preferably 0) is estimated as the velocity or the angular velocity of the transmitter 2. COPYRIGHT: (C)2011,JPO&INPIT