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.

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.

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

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

A Pneumatic On-Off Vehicle Suspension System

1977 ◽  
Vol 99 (2) ◽  
pp. 130-136 ◽  
Author(s):  
D. L. Klinger ◽  
A. J. Calzado
Keyword(s):  
Vibration Isolation ◽  
Relative Displacement ◽  
Disturbance Attenuation ◽  
Vehicle Suspension ◽  
System Complexity ◽  
Pressure Transducers ◽  
Control Signals ◽  
Pneumatic Suspension ◽  
Simulation Results ◽  
Vehicle Suspension System

An active, nonlinear, pneumatic suspension applicable to passenger railcars is described. Standard on-off valves modulate pressure differences between dual opposing airbags to attenuate vibration and create guidance forces. Improved vibration isolation over that of conventional passive suspensions is achieved at low power levels. Guidance forces are provided with small suspension travel using short bursts of compressed air taken from vehicle supply reservoirs. Acceleration, relative displacement, and pressure transducers provide the control signals required for stabilization, feedforward guidance commands, and disturbance attenuation. Simulation results indicate that performance comparable to hydraulic servosystems can be attained with substantially reduced system complexity and power requirements.

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