| 摘要 |
PURPOSE:To enable the reduction in the length of a measuring pipe, by providing an arithmetic circuit which calculates the void content of the two-phase flow in a measuring pipe in accordance with the detection signal of a detector which detects the radiation beam transmitting the two-phase flow in said tube. CONSTITUTION:A radiation source 3, a radiation detector 4 which irradiates a radiation beam 5, a collimator 6 provided to the source 3 and a slit 7 provided to the detector 4 are provided in addition to a flow pipe 101 for two-phase flow in which the two-phase flow 1 to be measured flows. The detection signal of the detector 4 is transmitted through a signal cable 8 to an arithmetic circuit 9, by which void content alpha is calculated. More specifically, the beam 5 of X- rays or gamma-rays irradiated from the source 3 is throttled to a fine parallel beam by the collimator 6 and transmits the two-phase flow including the foam 10 mixed therein then the beam is made incident to the detector 4 past the slit 7 and the void volume alpha is calculated in accordance with the detection signal in the circuit 9. |
