| 摘要 |
<p>An electromagnetic flowmeter for water conveyance in a semifull state, whose measurement error caused by the inclination of a pipeline can be reduced. In the flowmeter, excitation coils U and L provided on the upper and lower sides of a pipeline 1 are excited alternately and the flow rate QO of the pipeline is given by the equation QO = epsilon UO/k O where epsilon UO is determined by the ratio of the output voltages of the coils U, L when the coils are excited PO = epsilon LO/ epsilon UO and k O is the sensitivity at that time. The flowmeter is characterized in that the data of the relation of the flow rate Q with the output ratio epsilon L/ epsilon U and the data of the relation of the flow rate Q with the sensitivity k are measured beforehand using various inclinations alpha , beta , gamma , delta ,... of the pipeline as parameters, and from these data, the flow rate QO is calculated and corrected by using the curve representing data on an inclination approximate to an unknown inclination rho of the pipeline. <IMAGE></p> |
