管路の圧力流量間の動特性を利用した非定常流量計測手法 : 2点の圧力を用いる手法

概要

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The paper describes an approach to estimating unsteady flow rate through a pipe in real time. In this method, the unsteady flow rate is estimated by using hydraulic pipeline dynamics, and measured pressures at two points (upstream and downstream section) distant by a finite length along the pipeline. By scheming the high-speed operations of convolutions between the weighting functions and measured pressure data, data processing in a microcomputer system is achieved in real time using exclusive precalculated maps. The weighting functions are obtained by the application of the inverse fast Fourier transform from the transfer functions which are derived from the transfer matrix. Under unsteady laminar oil flow, good agreement between the estimated and measured flow rate waveforms illustrates the validity of the method proposed here.
一般社団法人日本機械学会の論文
1991-09-25