INJECTION MEASURING DEVICE AND INJECTION MEASURING METHOD

PROBLEM TO BE SOLVED: To enable an appropriate measurement to be carried out without requiring any troublesome works.SOLUTION: A measurement control device 8 of this invention injects liquid from an injection nozzle 2 into a closed vessel 1, calculates a frequency fof a pressure oscillation and a rise amount ΔPof pressure, measures a mass Nof discharged liquid in order to return a pressure in the closed vessel 1 to a prescribed back-pressure with a mass flow meter 7 and sets a coefficient M in view of an equation of M=N×f/ΔP. The measurement control device 8 calculates an injection-quantity Iq in reference to an equation of Iq=M×(ΔP/f) under application of a frequency (f) of pressure oscillation calculated in respect to injection of liquid in subsequent measurement of liquid injection amount, a rise amount of pressure ΔP and a coefficient M.SELECTED DRAWING: Figure 1 【課題】煩雑な作業を必要とすることなく適正な計測を行えるようにする。【解決手段】測定制御装置８は、インジェクションノズル２から液体を密閉容器１内に噴射し、圧力振動の周波数ｆdと圧力の上昇量ΔPdとを算定し、密閉容器１内の圧力を所定の背圧に復帰するために排出した液体の質量Ndを質量流量計７で測定し、係数Mを、M = Nd?ｆd2/ΔPd、により設定する。測定制御装置８は、以降の液体の噴射量の計測において、液体の噴射に対して算定された圧力振動の周波数ｆと圧力の上昇量ΔPと、係数Mとを用いて、Iq = M?(ΔP/ｆ2)として噴射量Iqを求める。【選択図】図１