| 摘要 |
A single tube Coriolis flowmeter having a flow tube and balance bar vibrated in-phase opposition. Material flow through the vibrating flow tube induces Coriolis deflections in the flow tube which, via brace bars, induces in-phase Coriolis like deflection in the balance bar. A balance bar resonator coupled to the balance bar is excited to vibrate in a rotational mode out of phase with respect to the balance bar. The vibration of the balance bar resonator increases the accuracy of the flowmeter output data by 1) increasing meter flow sensitivity by applying torque to the balance bar to reduce its in-phase Coriolis like deflections; 2) by applying torque to the flow tube via the balance bar to reduce shaking of the flowmeter; and 3) causing the flowmeter to have a flat calibration factor with respect to changed in material density.
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