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Abstract
A dynamic pressure generator using a rotating valve has been developed to evaluate the dynamic characteristics and performance of pressure transducers. The waveform of the generated dynamic pressure is square, and the amplitude and fundamental frequency can be varied. In this paper, the generator using a novel rotating valve and the method of evaluating the frequency characteristics of pressure transducers using the generator are described. With the amplitude of the dynamic pressure of 10 kPa and varying the fundamental frequency in 1-Hz increments between 10 and 50 Hz, we measured the generated dynamic pressure using two different pressure transducers, and to obtain the amplitude spectrum of the measured waveform using frequency analysis. Then, the magnitude of the harmonic components in the spectrum are shown as a function of frequency. From the simultaneous outputs of two transducers, the frequency characteristics of one transducer was compared with that of the other.
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