462 コリオリ質量流量計における空気混入診断 : 2つのセンサ出力間における相関の揺動による手法(設備の監視,OS-11 システムのモニタリングと診断,総合テーマ「伝統を,未来へ!」)

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  • 462 Aerated Flow Diagnosis in Coriolis Mass flowmeter : Method Based on the Fluctuations of Mathematical Function Related to 2 Sensors' Output

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This paper proposes a diagnostic method of an aerated flow that causes significant flow measurement errors in Coriolis mass flowmeter. In order to diagnose the aerated flow at a water line with a Coriolis mass flowmeter, three factors: amplitudes of 2 sensor signals and the phase difference between them-are focused on. Through the experimental investigations, the following facts are derived: 1) Our proposed diagnostic index increases with the increase in the void fraction. 2) The diagnostic index is approximately 0 at the single-phase flow. These results show that this diagnostic index can distinguish the single-phase flow from the aerated flow.

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