Interference Wave Suppression Method of Distributed Optical Fiber Sensors in High-Resolution Seismic Observation

Since distributed optical fiber sensors will generate strong interference waves during seismic wave acquisition, in order to obtain high-resolution seismic waves, a distributed optical fiber sensor interference wave suppression method in high-resolution seismic observation is proposed. By analyzing the generation process and characteristics of interference waves in distributed optical fiber sensors in high-resolution seismic observation, it is clear that the interference waves are cable waves and spring waves. The recursive cyclic translation adaptive threshold sheet transformation method is established. The improved particle swarm optimization algorithm based on multi-stage and multi-model is used to optimize the adaptive threshold and improve the interference wave suppression effect. The optimized recursive cyclic translation adaptive threshold sheet transformation method is used to decompose the seismic wave collected by the distributed optical fiber sensor, suppress the interference wave part, and obtain the effective seismic wave after interference wave suppression. The experimental results show that for single seismic wave and multi-channel seismic wave, this method can not only ensure the coherence of effective seismic wave, but also suppress interference wave more thoroughly. Under different noise levels, the correlation coefficient and amplitude attenuation of this method are high, and it has better interference wave suppression effect.