Ultrasonic impulse of capacity measurement manner and the program null necessary frequency for capacity measurement which use the Doppler type

摘要

PROBLEM TO BE SOLVED: To provide technique as to a Doppler type ultrasonic flowmeter allowing more precise flow measurement even when a measured value of a flow velocity distribution is dispersed.;SOLUTION: This flowmeter is provided with an output operation monitor provided with a flow velocity distribution outputting means for outputting, on a screen, the flow distribution of a measured fluid in a measuring area, a central display means for displaying the center of a measured point in the measured fluid with respect to the flow velocity distribution displayed on the screen by the flow velocity distribution outputting means, and a divided distribution selecting means for making a user select one of flow velocity distributions divided into two using the central display as a boundary, to be output. A flow rate computing means executes computation using the one divided distribution selected using the divided distribution selecting means, and executes multiplication by two to measure a flow rate of the measured fluid in the measuring area.;COPYRIGHT: (C)2004,JPO