论文部分内容阅读
A sensitive polymer diaphragm based fiber Fabry-Perot(F-P) sensor for aeroacoustic wave measurement is presented.A novel polymer material poly(phthalazinone ether sulfone ketone)(PPESK) diaphragm is used as the acoustic sensing element.The effective dimensions of the diaphragm are 4 mm in diameter and 6μm in thickness.Owing to the good mechanical and optical features of the diaphragm and application of the interferometric/intensity demodulation,a system sensitivity of 31 mV/Pa is achieved in the frequency range of 0.1-12.7 kHz,and a signal-to-noise ratio(SNR) of 29 dB at 1 kHz is obtained.The linear response of the sensor is from 0.35 to 2.82 Pa,corresponding to 85 - 103 dB sound pressure level(SPL)(re:20μPa).The sensor has the potential to be used as a universal and low-cost optical microphone.
A sensitive polymer diaphragm based fiber Fabry-Perot (FP) sensor for aeroacoustic wave measurement is presented. A novel polymer material poly (phthalzinone ether sulfone ketone) (PPESK) diaphragm is used as the acoustic sensing element. The effective dimensions of the diaphragm are 4 mm in diameter and 6 μm in thickness. Orwing to the good mechanical and optical features of the diaphragm and application of the interferometric / intensity demodulation, a system sensitivity of 31 mV / Pa was achieved in the frequency range of 0.1-12.7 kHz, and A signal-to-noise ratio (SNR) of 29 dB at 1 kHz is obtained. The linear response of the sensor is from 0.35 to 2.82 Pa, corresponding to 85 - 103 dB sound pressure level (SPL) (re: 20 μPa). The sensor has the potential to be used as a universal and low-cost optical microphone.