FLOW SPEED MEASURING APPARATUS, CONTROLLER EMPLOYING IT, AND FLOW DIRECTION MEASURING APPARATUS

摘要

PURPOSE: To measure the speed of very slow flow in a lake. ;CONSTITUTION: Total pressure measuring sections 1A, 1B are moved, respectively, in the flow direction and the opposite direction by means of a motor 2 and the differential pressure is detected and employed, together with the moving speeds of the total pressure measuring sections 1A, 1B, in the calculation of flow speed. Detection sensitivity can be enhanced by increasing the moving speed even for a non-steady flow of very low flow speed.;COPYRIGHT: (C)1993,JPO&Japio