Coriolis mass-flow meter with integrated multi-DOF active vibration isolation

Mechatronics ◽  
2016 ◽  
Vol 36 ◽  
pp. 167-179 ◽  
Author(s):  
L. van de Ridder ◽  
W.B.J. Hakvoort ◽  
D.M. Brouwer ◽  
J. van Dijk ◽  
J.C. Lötters ◽  
...  
Keyword(s):  
Mass Flow ◽  
Vibration Isolation ◽  
Flow Meter ◽  
Active Vibration ◽  
Coriolis Mass Flow Meter ◽  
Active Vibration Isolation

Active vibration isolation feedback control for Coriolis Mass-Flow Meters

2014 ◽  
Vol 33 ◽  
pp. 76-83 ◽  
Author(s):  
L. van de Ridder ◽  
M.A. Beijen ◽  
W.B.J. Hakvoort ◽  
J. van Dijk ◽  
J.C. Lötters ◽  
...  
Keyword(s):  
Feedback Control ◽  
Mass Flow ◽  
Vibration Isolation ◽  
Flow Meters ◽  
Active Vibration ◽  
Active Vibration Isolation

Vibration Isolation by an Actively Compliantly Mounted Sensor Applied to a Coriolis Mass-Flow Meter

2016 ◽  
Vol 138 (3) ◽  
Author(s):  
L. (Bert) van de Ridder ◽  
Wouter B. J. Hakvoort ◽  
Johannes van Dijk ◽  
Joost C. Lötters ◽  
André de Boer
Keyword(s):  
Mass Flow ◽  
Flow Measurement ◽  
Vibration Isolation ◽  
Relative Displacement ◽  
Displacement Measurement ◽  
Sensor Element ◽  
Flow Meter ◽  
Displacement Sensors ◽  
Acceleration Feedback ◽  
Coriolis Mass Flow Meter

In this paper, a vibration isolated design of a Coriolis mass-flow meter (CMFM) is proposed by introducing a compliant connection between the casing and the tube displacement sensors, with the objective to obtain a relative displacement measurement of the fluid conveying tube, dependent on the tube actuation and mass-flow, but independent of external vibrations. The transfer from external vibrations to the relative displacement measurement is analyzed and the design is optimized to minimize this transfer. The influence of external vibrations on a compliant sensor element and the tube are made equal by tuning the resonance frequency and damping of the compliant sensor element and therefore the influence on the relative displacement measurement is minimized. The optimal tuning of the parameters is done actively by acceleration feedback. Based on simulation results, a prototype is built and validated. The validated design shows more than 24 dB reduction of the influence of external vibrations on the mass-flow measurement value of a CMFM, without affecting the sensitivity for mass-flow.

Vibration Isolation by Compliant Sensor Mounting Applied to a Coriolis Mass-Flow Meter

2014 ◽  
Author(s):  
L. (Bert) van de Ridder ◽  
Wouter B. J. Hakvoort ◽  
Johannes van Dijk
Keyword(s):  
Mass Flow ◽  
Flow Measurement ◽  
Vibration Isolation ◽  
Relative Displacement ◽  
Displacement Measurement ◽  
Sensor Element ◽  
Flow Meter ◽  
Displacement Sensors ◽  
Simulation Results ◽  
Coriolis Mass Flow Meter

In this paper a vibration isolated design of the Coriolis Mass-Flow Meter (CMFM) is proposed, by introducing a compliant connection between the casing and the tube displacement sensors with the intention to obtain a relative displacement measurement of the fluid conveying tube, dependent on the tube actuation and mass-flow, but independent of casing excitations. Analyses are focussed on changing the transfer function of support excitations to the relative displacement measurement. The influence of external vibrations on a compliant sensor element and the tube are made equal by tuning the resonance frequency and damping of the compliant sensor element and therefore the influence on the relative displacement measurement is minimised. Based on simulation results, a prototype is built and validated. The validated design show a 20dB reduction of the influence of external vibrations on the mass-flow measurement value of a CMFM, without affecting the sensitivity for mass-flow.

The Coriolis mass flow meter as a volume meter for the custody transfer in liquid hydrocarbons logistics

2019 ◽  
Vol 90 ◽  
pp. 311-318 ◽  
Author(s):  
A. García-Berrocal ◽  
C. Montalvo ◽  
P. Carmona ◽  
J. Blázquez
Keyword(s):  
Mass Flow ◽  
Liquid Hydrocarbons ◽  
Flow Meter ◽  
Coriolis Mass Flow Meter

scholarly journals Tilt Active Vibration Isolation Using Vertical Pendulum and Piezoelectric Transducer with Parallel Controller

2021 ◽  
Vol 11 (10) ◽  
pp. 4526
Author(s):  
Lihua Wu ◽  
Yu Huang ◽  
Dequan Li
Keyword(s):  
Piezoelectric Transducer ◽  
Vibration Isolation ◽  
Vertical Vibration ◽  
Open Loop ◽  
Negative Effects ◽  
Voltage Controller ◽  
Hysteresis Nonlinearity ◽  
Passive Vibration Isolation ◽  
Active Vibration ◽  
Active Vibration Isolation

Tilt vibrations inevitably have negative effects on some precise engineering even after applying horizontal and vertical vibration isolations. It is difficult to adopt a traditional passive vibration isolation (PVI) scheme to realize tilt vibration isolation. In this paper, we present and develop a tilt active vibration isolation (AVI) device using a vertical pendulum (VP) tiltmeter and a piezoelectric transducer (PZT). The potential resolution of the VP is dependent on the mechanical thermal noise in the frequency bandwidth of about 0.0265 nrad, which need not be considered because it is far below the ground tilt of the laboratory. The tilt sensitivity of the device in an open-loop mode, investigated experimentally using a voltage controller, is found to be (1.63±0.11)×105 V/rad. To compensate for the hysteresis nonlinearity of the PZT, we experimentally established the multi-loop mathematical model of hysteresis, and designed a parallel controller consisting of both a hysteresis inverse model predictor and a digital proportional–integral–differential (PID) adjuster. Finally, the response of the device working in close-loop mode to the tilt vibration was tested experimentally, and the tilt AVI device showed a good vibration isolation performance, which can remarkably reduce the tilt vibration, for example, from 6.0131 μrad to below 0.0103 μrad.

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