地震物理模型是在实验室内将野外的地质构造和地质体按照一定的模拟相似比制

The seismic physical model is a geological model made in the laboratory according to a certain simulation similarity of the geological structure and the geological body in the field [1]. The seismic physical model ultrasonic imaging technology uses the propagation of high-frequency ultrasonic waves in the model to simulate the propagation of seismic waves in the geological body, and obtains the internal structure information of the seismic physical model by receiving and processing the information of the reflected signal. Among them, the piezoelectric ceramic transducer PZT is generally used as the ultrasonic signal source and receiver. However, this type of transducer has three main disadvantages: susceptibility to electromagnetic interference, narrow response frequency band, and excessive size [2-3]. Optical fiber ultrasonic sensor has become a research hotspot due to its advantages of anti-electromagnetic interference, small size, easy reuse and bandwidth of response frequency.

The seismic physical model is a geological model which is made by the geological structure and geological body in the field according to a certain simulation similarity ratio in the laboratory. The ultrasonic imaging technology of seismic physical model is to simulate the propagation of seismic wave in geological body by the propagation of high frequency ultrasonic in the model. The internal structure information of the seismic physical model can be obtained by receiving and processing the information of reflection signal. PZT is generally used as the signal source and receiver of ultrasonic. However, the transducer has three main disadvantages: easy to be subjected to electromagnetic interference, narrow response frequency band and too large size. The fiber ultrasonic sensor has become a hot research topic because of its advantages of anti electromagnetic interference, small volume, easy to reuse and wide response frequency band.<br>

Seismic physical model is a geological model made in the laboratory according to a certain simulation similarity ratio between geological structures and geological bodies in the field. Ultrasonic imaging technology of seismic physical model simulates the propagation of seismic waves in the ground mass by the propagation of high-frequency ultrasonic waves in the model, and obtains the internal structure information of the seismic physical model by receiving and processing the information of reflected signals. Among them, piezoelectric ceramic transducer PZT is generally used as the signal source and receiver of ultrasonic wave. However, this transducer mainly has the following three shortcomings: susceptibility to electromagnetic interference, narrow response frequency band and oversize [2-3]. Optical fiber ultrasonic sensor has become a research hotspot because of its advantages of anti-electromagnetic interference, small size, easy reuse and wide response frequency.