| 摘要 |
<p>PURPOSE:To cancel Doppler components due to deflection effectively by using respective wave receiving signals by giving directional beams of a fixed angle to a wire and extracting the movement of the wire as Doppler components. CONSTITUTION:Wave transmitting and receiving devices 1, 2, 3 of radio waves or ultrasonic waves are arranged at equal intervals (more than bisecting) on the circumference of equal radius with the section of a wire as the center. Directional beams of specified angle alpha to the wire 4 are given to the transmitters and receivers 1, 2, 3 by a winch, and the movement of the wire is extracted as Doppler components. Doppler components caused by deflection are canceled effectively by an operation processing section 6 utilizing frequency of respective received wave signals. Thus, only Doppler components caused by shifting of the wire can be extracted.</p> |
