Borehole strain observation full-frequency band data acquisition device

Abstract

The invention belongs to the digital seismic observation field and relates to a borehole strain observation full-frequency band data acquisition device. The data acquisition device is provided with two 4-input data acquisition channels, can simultaneously generate second-sampling and 100-sampling high-precision and wide-dynamic range observation data and 10000Hz-sampling high-sampling rate observation data, and carry out precise synchronization on the observation data through a GPS clock; and the borehole strain observation full-frequency band data acquisition device and a 4-component borehole strain seismograph can be combined together to form an observation system of which the frequency band ranges from 10<-6>Hz to 1000Hz, which can carry out digital observation of earth tide, seismic wave and high-frequency microquake or earth sound. According to the borehole strain observation full-frequency band data acquisition device, the traditional earth tide observation function of a borehole strain instrument is reserved; a seismic wave observation new means which cannot be realized by a pendulum seismograph can be provided; especially a high-frequency microquake observation function or an earth sound observation function is realized; and the cognition of people for seismic waves can be enriched. The borehole strain observation full-frequency band data acquisition device covers all frequency bands in the seismic observation field and has great application significance in deepening the understanding of people for high-frequency microquake or earth sound and the like.

Description

technical field [0001] The invention relates to the field of digital seismic observation, in particular to a full-band data acquisition controller for borehole strain observation. It can simultaneously produce 4 input signals with high precision and large dynamic range of sampling per second and 100Hz sampling and high sampling rate observation data of 10000Hz sampling, and the observation data can be precisely synchronized through the GPS clock, which can be used with the frequency band range of 10-6Hz-1000Hz The 4-component borehole strain seismometer together constitutes an observation system for simultaneous observation of solid tides, seismic waves and high-frequency microseisms or geoacoustics. Background technique [0002] The borehole strain gauge is a kind of crustal strain observation instrument. It is one of the main instruments in the China Digital Seismic Network, and it is also the instrument adopted by the US "Earth Lens" project. In the China Digital Seismic...

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Problems solved by technology

When applied to the 4-component borehole strain seismograph proposed and realized in the national invention patent ZL20061007216.7, there are the following problems: 1. Since it is mainly designed for the three-component seismograph, the number of channels is not suitable for the borehole strain seismograph , that is, if the four components of the borehole strain seismograph are arranged in two sets of data acquisition channels as two seismographs, it will bring great inconvenience to the instrument and data management; 2. At most, only seismic waves and fixed Tide observation, does not have the observation function of high-frequency microseisms or geoacoustics

Other types of data collectors do not have the ability or function to simultaneously observe solid tides, seismic waves, high-frequency microseisms or ground sounds

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