ULTRASONIC DOPPLER RHEOMETER

摘要

In order to suppress the transient phenomenon of a wall filter, an ultrasonic Doppler rheometer uses a clutter component estimation unit (110) for estimating an amplitude, an initial phase, a phase speed of a clutter component from a detection output by a phase detection unit (104). According to the estimated data, an initialization value of the wall filter (105) is generated by a filter initial value generation unit (11), and the value is given to the wall filter (105) to perform filter processing.