【摘要】 本研究基于傅里叶变换及S变换时频分析，对地震预警站点的干扰波形进行处理。结果显示，首先，对于维修与巡检等造成的干扰波形，速度计干扰波形的低频优势频率为0.02 Hz左右，高频成分频率范围在5～45 Hz之间，高频优势频率为22 Hz左右，而加速度计干扰波形与速度计干扰波形不同的是无低频成分，干扰频率在5～46 Hz之间，另外还包括一些整数频率；其次，对于道路施工造成的干扰波形，速度计干扰波形的低频优势频率为0.01～0.02 Hz，高频成分频率范围在5～40 Hz之间，高频优势频率为26 Hz左右，而加速度计干扰频率范围在5～45 Hz之间，高频优势频率为20～30Hz；最后，对于车辆通行造成的干扰波形，速度计与加速度计的计算结果显示，干扰频率范围在5～45 Hz之间。更多还原

【Abstract】 This study is based on Fourier transform and S-transform time-frequency analysis to process the interference waveform of earthquake warning stations. The results show that firstly, for the interference waveforms caused by maintenance and inspection, the low-frequency dominant frequency of the speedometer interference waveform is about 0.02 Hz, the high-frequency component frequency range is between 5-45 Hz, and the high-frequency dominant frequency is about 22 Hz.However, the difference between the accelerometer interference waveform and the speedometer interference waveform is that there is no low-frequency component, the interference frequency is between 5-46 Hz, and some integer frequencies are also included; Secondly, for the interference waveform caused by road construction, the low-frequency dominant frequency of the speedometer interference waveform is 0.01～0.02 Hz, and the high-frequency component frequency range is between 5～40 Hz,with a high-frequency dominant frequency of about 26 Hz. The interference frequency range of the accelerometer is between5～45 Hz, with a high-frequency dominant frequency of 20～30 Hz. Finally, for the interference waveform caused by vehicle traffic, the calculation results of the speedometer and accelerometer show that the interference frequency range is between5～45 Hz.更多还原