Experimental evaluation of dynamic characteristics of strain gauge pressure transducers under pulsed vibration effects

This paper presents an experimental approach for evaluating the dynamic characteristics of strain gauge pressure transducers under pulsed ultrasonic (vibration-like) excitation using spectral transfer-function identification without prior knowledge of the emitter frequency response. Two silicon-sapphire strain gauge pressure transducers with different sensing-element designs (types A and B, nominal range 0-100 kPa) were tested. The estimated normalized frequency responses show distinct resonance patterns: type A exhibits pronounced maxima at approximately 6.4, 23.5, and 68.6 kHz with peak normalized magnitude H f ≈ 0.99, 0.56, and 0.88, respectively, whereas type B shows a smoother response with the dominant maximum near 44.4 kHz ( H f ≈ 0.44). The peak response of type A is about 2.3× higher than that of type B, indicating higher susceptibility to vibration-induced dynamic errors in the corresponding bands. The proposed technique supports comparative assessment of vibration resistance and dynamic measurement errors under controlled laboratory broadband excitation.

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