仪器的频率响应比在甄别地倾斜异常中的应用

The application of the frequency response rate of the instrument in recognition of the further ground inclination

在同一观测点,对于观测同一形变物理量的不同类型仪器而言,由于频率响应不同,对同一应变源的输出响应将不同,但各仪器的谱比应与其频率响应比相一致,本文称之为同源形变关系。因此,两套倾斜仪(或应变仪)在正常情况下其观测量的谱比应满足同源形变关系;也就是说,孕震的异常信息观测同正常的固体潮观测其谱比应一致。利用这一关系可以在一定程度区别形变异常、仪器及其小环境引起的干扰,从而在一定程度上排除干扰。

The response of different type of instruments at the same site to the same deformational anomaly is different because they have different frequency response. However, the wave spectrum ratio should agree with the ratio of the frequency responses. In this paper, it is named the same seismic focus deformation relation. Therefore in normal cases, the wave spectrum ratio of the measurements of two sets of slant or strain instruments should satisfy the same seismic focus deformation relation. In other words, the wave spectrum ratio of anomalous information of the promising earthquake and the normal solid tide should be identical. With the relationship, abnormal shape change can be distinguished from the disturbance of instruments and ambient noise, so eliminating the noise becomes possible.