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A Model-Based Analysis of Capacitive Flow Metering for Pneumatic Conveying Systems: A Comparison between
Thomas Suppan1, Markus Neumayer1, Thomas Bretterklieber1
1Christian Doppler Laboratory for Measurement Systems for Harsh Operating Conditions, Institute of Electrical Measurement and Sensor Systems, Graz University of Technology, 8010 Graz, Austria.
Sensors (Basel, Switzerland)
|February 15, 2022
Summary
Electrical capacitance tomography (ECT) flow meters offer advantages over calibration-based systems for pneumatic conveying. ECT provides better spatial material distribution estimates, improving process control in bulk material transport.
Area of Science:
- Engineering
- Measurement Science
Background:
- Pneumatic conveying is vital for industrial bulk material transport.
- Accurate flow metering is essential for efficient operation and process control.
- Capacitive measurement systems are commonly used for flow metering in these systems.
Purpose of the Study:
- To comparatively analyze calibration-based and Electrical Capacitance Tomography (ECT) based flow meters for pneumatic conveying.
- To evaluate sensor and algorithm behavior using measurement experiments and a holistic system model.
Main Methods:
- Developed a comparative analysis framework for capacitive flow metering techniques.
- Utilized measurement experiments and a holistic system model for evaluation.
- Conducted Monte Carlo simulations with randomly generated pneumatic conveying flow patterns for model-based analysis.
Main Results:
- Demonstrated the potential benefits of Electrical Capacitance Tomography (ECT) based flow meters.
- Highlighted limitations of calibration-based flow meters tied to calibration measurement extent.
- Showcased ECT's ability to estimate spatial material distribution for improved accuracy.
Conclusions:
- ECT-based flow meters show superior performance compared to calibration-based designs for pneumatic conveying.
- Model-based signal processing in ECT offers advantages over regression methods for flow metering.
- Further development in ECT instrumentation and modeling can enhance bulk material transport efficiency.
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