Polymer Conductive Membrane-Based Non-Touch Mode Circular Capacitive Pressure Sensors: An Analytical Solution-Based...

Area of Science:

• Materials Science
• Mechanical Engineering
• Electrical Engineering

Background:

• Capacitive pressure sensors offer non-contact measurement capabilities.
• Polymer conductive membranes are suitable for flexible and sensitive sensor applications.
• Accurate analytical models are crucial for sensor design and calibration.

Purpose of the Study:

• To develop an analytical solution-based method for designing polymer conductive membrane-based capacitive pressure sensors.
• To establish an accurate analytical relationship between capacitance and applied pressure.
• To investigate the influence of design parameters on sensor performance.

Main Methods:

• Derivation of an analytical relationship for the elastic behavior of circular polymer conductive membranes under pressure.
• Numerical calculations and least-squares data fitting to establish the pressure-capacitance input-output relationship.
• Investigation of design parameters like membrane thickness and Young's modulus.

Main Results:

• An accurate analytical relationship between capacitance and applied pressure was derived.
• The pressure-capacitance input-output relationship was accurately established using numerical methods.
• The impact of membrane thickness and Young's modulus on sensor performance was clarified.

Conclusions:

• The presented analytical method enables precise design and numerical calibration of non-touch mode circular capacitive pressure sensors.
• Understanding the influence of design parameters allows for targeted optimization of sensor characteristics.
• This work provides a foundation for developing advanced polymer conductive membrane-based sensors.