Piezoelectric Pressure Transmitter For Measuring Dynamic, High-Frequency And Transient Pressure

This is a special sensor used for measuring dynamic, high-frequency and transient pressure. Its working principle and application scenarios are fundamentally different from the mainstream technologies for static pressure measurement, such as piezoresistive and capacitive ones.

1. Extremely High Frequency Response and Ultra-Fast Dynamic Performance
   • This is its core advantage. The piezoelectric element itself has extremely high stiffness, with a natural frequency reaching hundreds of kHz or even MHz. This enables it to precisely capture extremely rapid pressure transients, shock waves, and vibrations.
   • The rise time is extremely short (down to the microsecond level).
2. High Sensitivity and High Resolution
   • It can detect minute dynamic pressure changes.
3. Compact Size and Robust Structure
   • The piezoelectric element itself can be made very compact and can withstand extremely high overloads (up to more than 10 times the range), making it suitable for use in harsh mechanical environments.
4. Wide Operating Temperature Range
   • Especially natural quartz sensors, which can operate in extreme temperatures ranging from -200°C to +400°C.
5. No External Power Supply Required (for the sensor itself)
   • The piezoelectric element is self-generating and does not require a power source. However, the subsequent charge amplifier does need power.

1. Engine and combustion research:
   • Measurement of explosion pressure in the cylinder of an internal combustion engine - This is the most classic application. Monitor the combustion process and analyze detonation.
   • Pressure pulsation in the combustion chamber of a turbine engine.
2. Explosion and shock wave physics:
   • Measurement of explosion shock wave pressure, ballistic impact pressure, and weapon development.
3. Fluid dynamics research:
   • Measurement of pressure pulsation, turbulence, and cavitation in high-speed fluids.
   • Monitoring of water hammer effect.
4. Industrial process monitoring:
   • Monitoring of pulsation pressure in compressors and pumps for fault diagnosis (such as detecting cavitation and valve hammering).
   • Monitoring of pressure in the mold cavity of injection molding machines.
5. Acoustics and vibration:
   • Can be used as the core of a high-performance microphone to measure sound pressure.
6. Aerospace:
   • Wind tunnel testing, measurement of surface pressure pulsation on aircraft.

Piezoelectric pressure transmitters are the "high-speed cameras" and "special scouts" in the field of dynamic pressure measurement. They are not designed for conventional, slowly varying industrial process control but rather serve as precision instruments for capturing transient, rapidly changing pressure phenomena.