Question

____ measures dynamic pressure.

• A. Bourdon tube pressure gauges
• B. Barometric sensor
• C. Piezoelectric pressure sensor
• D. Piezoresistive pressure sensor

Hint:

Dynamic Pressure Measurement. Requires sensors with fast response times. Piezoelectric sensors generate charge almost instantly upon pressure change, making them excellent for dynamic and high-frequency pressure measurements.

Answer 1

The Correct Option is C

Dynamic pressure refers to rapidly changing or fluctuating pressure
Measuring such pressure requires a sensor with a fast response time
- Bourdon tube pressure gauges are mechanical devices suitable for measuring static or slowly changing gauge pressures; they have significant inertia and slow response
- Barometric sensors measure atmospheric pressure, which usually changes relatively slowly
- Piezoresistive pressure sensors measure pressure based on the change in resistance of a material under stress
They can measure dynamic pressure but may have limitations in frequency response compared to piezoelectric sensors
- Piezoelectric pressure sensors utilize the piezoelectric effect, where certain crystals generate an electrical charge proportional to the applied pressure/force
This charge generation is nearly instantaneous, giving these sensors a very high frequency response, making them ideal for measuring dynamic and transient pressures (like explosions, pulsations, acoustics)
Therefore, piezoelectric pressure sensors are particularly well-suited for measuring dynamic pressure