An Annular Conductive Membrane-Based Hollow Capacitive Wind Pressure Sensor: Analytical Solution and Numerical Design...

Area of Science:

• Mechanical Engineering
• Sensor Technology
• Applied Physics

Background:

• Accurate measurement of wind pressure and gas flow rates is crucial in various engineering applications.
• Existing sensors often face limitations in sensitivity, accuracy, or range of application.
• Development of novel sensing principles is essential for advancing measurement capabilities.

Purpose of the Study:

• To propose and analyze a novel hollow capacitive wind pressure sensor.
• To develop an analytical solution for the elastic behavior of the sensor's membrane.
• To investigate the sensor's performance and potential applications in pressure and flow rate measurement.

Main Methods:

• Design of a hollow capacitive sensor with a non-parallel plate variable capacitor.
• Derivation of an analytical solution for large deflection elastic behavior using new membrane governing equations.
• Numerical design, calibration, and investigation of design parameter effects on the capacitance-pressure relationship.
• Experimental verification of the derived analytical solution.

Main Results:

• A novel hollow capacitive wind pressure sensor was successfully proposed.
• A new analytical solution for the membrane's elastic behavior was derived and validated.
• The sensor demonstrated potential for detecting wind pressure and measuring flow rates.
• The study provided a comprehensive analysis of design parameters influencing sensor performance.

Conclusions:

• The proposed hollow capacitive sensor offers a promising new approach for wind pressure and gas flow rate measurement.
• The developed analytical solution provides a superior method for understanding sensor behavior.
• The sensor's unique design and validated performance highlight its potential for practical applications.