【摘要】 为克服常用声发射传感器必须和被测物体接触、工作频带较窄且带内幅频特性波动较大和易受电磁干扰的不足,提出采用光纤干涉仪原理研制声发射传感器.介绍了光纤声发射传感器的原理、系统组成.其频率范围为100kHz～1.4MHz,振幅分辨率为0.08nm.更多还原

【Abstract】 In order to overcome the disadvantages of the common used acoustic transmission transducer, i. e. the necessity of contacting with the measured object, the narrow operational band and bigger fluctuation of the amplitude vs. frequency characteristic within the band as well as influence by electromagnetic interference, the acoustic transmission transducer developed by using the principle of optical fibre interferometer is stated. The principle, system composition of the transducer are introduced. Its frequency range is 100kHz -1.4MHz and the amplitude resolution is 0.18nm.更多还原