Acoustic velocities of tap water and polymer solution were studied using ultrasonic-pulsereflectionmethod in the laboratory. Polymer density and apparent viscosity were measured.
As a result, this method offers much better reflection coefficients than ordinary segmental pulse deconvolution does.
因此,此法要比普通分段脉冲反褶积求解反射系数的精度高得多。
3
The automatic testing method of cable fault is characterized by that the pulse signal transmitted and received by pulse reflection test circuit can be directly superposed on the output end of d.