Dynamic Calibration Techniques for Pressure Measurement Systems
Summary
Dynamic calibration of pressure measurement systems addresses the challenge of accurately characterising sensor behaviour under rapidly changing pressure conditions. Unlike static calibration, which applies steady or slowly varying pressures, dynamic calibration must resolve minute sensitivity variations and phase shifts across a broad frequency spectrum. Common primary standards employ shock tubes or fast-opening valves to generate well-defined pressure steps with rise times down to the microsecond scale. Emerging methods integrate optical probing for precise timing, empirical compensation filters to correct acceleration-induced artefacts, and arbitrary waveform generators to simulate real-world pressure profiles. These techniques yield transfer functions in both amplitude and phase, enabling traceable characterisation of transducers from infrasonic through ultrasonic regimes. The resulting data underpin improvements in high-speed combustion diagnostics, aerospace system monitoring, industrial process control and geophysical sensing, where accurate transient pressure measurements are essential for safety, efficiency and scientific insight.
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Dynamic Calibration Techniques for Pressure Measurement Systems publication trend
The graph below shows the total number of articles in dynamic calibration techniques for pressure measurement systems across all publications each year (not limited to Nature Index journals).
Technical terms
Dynamic calibration: Procedure to determine a sensor’s amplitude and phase response when subjected to time-varying pressure signals.
Shock tube: Apparatus generating controlled pressure steps by releasing a high-pressure driver gas across a diaphragm into a driven section.
Transfer function: Mathematical representation of a sensor’s output response (sensitivity and phase) as a function of input frequency.
Phase lag: Delay in sensor output relative to the pressure stimulus, expressed in degrees or time units at a given frequency.
Piezoelectric pressure sensor: Transducer converting pressure changes into electric charge via deformation of piezoelectric crystal, often used for dynamic measurements.
References
- A method for correcting the high-frequency mechanical vibration effects in the dynamic calibration of pressure measurement systems using a shock tube. Mechanical Systems and Signal Processing (2023).
- Pressure Sensors: Working Principles of Static and Dynamic Calibration. Sensors (2024).
- Evaluation of Shock Tube Retrofitted with Fast-Opening Valve for Dynamic Pressure Calibration. Sensors (2021).
- Modeling and Studying Acceleration-Induced Effects of Piezoelectric Pressure Sensors Using System Identification Theory. Sensors (2019).
- Towards traceable dynamic pressure calibration using a shock tube with an optical probe for accurate phase determination. Metrologia (2022).
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