管内遠隔瞬時流量計測手法の機能拡張に関する研究 : 第1報,機能拡張の提案と内挿手法について

概要

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The paper describes an approach for extending the potential to estimate unsteady flow rate through oil hydraulic pipelines and components in real time, in combination with two previously proposed approaches. In this method, unsteady flow rate at an arbitrary point along the pipeline is estimated by using hydraulic pipeline dynamics and only two measured pressures at two distant points along the pipeline. This method has some advantages, that is, it is more convenient to install without disturbance and highly responsive to flow rate changes. We proposed the following two minor methods: an interpolation method and an extrapolation method. This paper mainly describes the interpolation method. In the interpolation method, unsteady flow rate at an arbitrary internal point between two points to measure the pressures is given by convolutions between the weighting functions and the two measured pressure values of the two distant points. High-speed operations of the convolutions in real time using a microcomputer can be simply achieved with the use of only software. Under unsteady laminar oil flow conditions, good agreement between the estimated and directly 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
1992-12-25