Process and device for determining the speed and the rate of flow of a fluid in a pipe by using a Doppler echographic method.

摘要

Two mutually attached wave-train transmitter-receiver units (3, 4) are mounted on a support so that they can be oriented as required with respect to a pipe (2) containing the moving fluid whose speed and rate of flow are to be determined. One transmitter-receiver (3) is brought into a position such that its axis is perpendicular to the axis of the pipe (2). Means (14) are provided for measuring the transit time between the transmission of a wave train by the transmitter-receiver (3) and the reception of the reflected train. A calculator unit (13) calculates the diameter and perpendicular cross-section of the pipe. Another calculator unit (11) calculates the instantaneous speed of the fluid at different points over the cross-section together with the instantaneous rate of flow in the pipe (2). <IMAGE>