Absolute quasi-static calibration method of piezoelectric high-pressure sensor based on force sensor

Area of Science:

• Mechanical Engineering
• Materials Science
• Metrology

Background:

• Piezoelectric high-pressure sensors require accurate calibration for reliable measurements.
• Existing calibration methods may have limitations in accuracy and applicability.
• Drop-weight devices are commonly used for dynamic pressure testing.

Purpose of the Study:

• To design and validate a strain-gauge-type force sensor for direct mounting on drop-weight devices.
• To develop an empirical formula for correcting peak pressure measurements.
• To enhance the accuracy of absolute quasistatic pressure calibration for piezoelectric sensors.

Main Methods:

• Design of a strain-gauge-type force sensor for drop-weight systems.
• Development of a mathematical model relating force and pressure.
• Finite element analysis (FEA) using ANSYS for mechanical strength and dynamic characteristics.
• Absolute quasistatic pressure calibration experiments.

Main Results:

• The designed force sensor can be directly mounted on existing drop-weight devices.
• An empirical formula was derived to correct peak pressure, improving accuracy.
• FEA provided insights into the sensor's mechanical strength and system dynamics.
• Experimental validation demonstrated a reduction in peak pressure calculation difference from 3.42% to 0.70%.

Conclusions:

• The developed strain-gauge force sensor and empirical correction method effectively enhance the accuracy of piezoelectric high-pressure sensor calibration.
• The study provides a validated approach for improving quasistatic pressure calibration in dynamic testing environments.
• Finite element analysis is a valuable tool for optimizing sensor design and understanding system behavior.