Research on piezoelectric pressure sensor for shock wave load measurement

Area of Science:

• Materials Science
• Mechanical Engineering
• Sensor Technology

Background:

• Accurate measurement of dynamic pressure from explosive shock waves is critical for safety and analysis.
• Existing sensors may face limitations in real-time, high-frequency response.
• Piezoelectric sensors offer potential for high-sensitivity dynamic pressure measurements.

Purpose of the Study:

• To develop and validate a piezoelectric pressure sensor for real-time measurement of explosive shock wave dynamics.
• To investigate the influence of structural design on sensor performance.
• To establish the sensor's capability for high-frequency dynamic load signal acquisition.

Main Methods:

• Designed a crystal group structural layout with acceleration compensation using mass blocks.
• Developed static and dynamic models to determine sensor sensitivity and natural frequency.
• Analyzed the impact of structural parameters on static and dynamic characteristics.
• Performed simulations to obtain input-output mapping under various pressure loads.
• Fabricated a sensor prototype and conducted static and dynamic calibration experiments.

Main Results:

• The sensor's static and dynamic models were established, yielding sensitivity and natural frequency.
• Simulations provided a clear mapping relationship between input pressure and sensor output.
• Calibration experiments confirmed the sensor's ability to measure high-frequency dynamic load signals.
• The designed crystal structure with acceleration compensation proved effective.

Conclusions:

• The developed piezoelectric pressure sensor is suitable for real-time measurement of explosive shock waves.
• The sensor meets the stringent requirements for high-frequency dynamic load signal acquisition.
• The study validates the sensor's design and calibration methodology for practical applications.