Dynamic Pressure-Gauge Calibrator
D. O. Mines · The Journal of the Acoustical Society of America · 1964
No satisfactory theoretical or experimental method has appeared by which it is possible to obtain economically for a complicated pressure gauge the diaphragm deflection as a function of the frequency of an applied sinusoidal pressure, over a frequency range that includes the natural diaphragm resonance. An experimental method is described by which a piezoelectric driver is employed to generate a sinusoidal pressure of continuously variable frequency and amplitude in a confined gas, to which one side of a test diaphragm may be exposed. Equations are derived describing the gas-coupling medium and the driver, so that the characteristics of the apparatns may be predicted. The apparatus is proven experimentally, using a series of thin, circular, clamped-edged plates whose dynamic response is both calculated and determined by ringing. Finally, the apparatus is employed to successfully determine the dynamic response of a commercial 500-psi pressure transducer connected to the generator by various lengths of tubing. The mechanical resonance of the transducer diaphragm and the acoustic resonance of the path through the tubing are both displayed.