Differential piezoelectric digital geophone

Abstract

The invention discloses a differential piezoelectric digital geophone. The differential piezoelectric digital geophone comprises a geophone core which comprises a cylindrical shielding case, a base, piezoelectric elements, mass blocks, a signal conditioning unit, a signal preprocessing unit, feed-through capacitors and outgoing cables. The base is arranged in the center of the shielding case and in rigid connection with the shielding case; the two groups of piezoelectric elements are symmetrically attached to two sides of the base, and the two mass blocks are symmetrically attached to the outer sides of one group of piezoelectric elements; the two groups of piezoelectric elements are connected with an input end of the signal conditioning unit through outgaining electrodes at two ends of the piezoelectric elements, an output end of the signal conditioning unit is connected with an input end of the signal processing unit, and an output end of the signal processing unit is connected with the outgaining cables through the feed-through capacitors. By means of the geophone core in the symmetrical structure, differential signal output and direct digital processing of signals, the differential piezoelectric digital geophone has the advantages of high flexibility, high antijamming capability, wide dynamic range, portability, durability and the like.

Description

technical field [0001] The invention belongs to the field of seismic exploration, in particular to a differential piezoelectric seismic digital detector. Background technique [0002] Seismic exploration method has extremely important research significance in the exploration of oil, natural gas and other mineral resources, engineering inspection, geological disaster prediction and so on. The main technical indicators of seismic exploration instruments are determined by geophones. The geophone with moving coil structure is still the most widely used geophone in domestic and foreign seismic exploration. However, due to its inherent mechanical characteristics, it has disadvantages such as low sensitivity, small dynamic range, large mass and volume, and poor anti-interference ability compared to the accuracy and dynamic range that can be achieved by existing seismic instruments. High requirements and complicated manufacturing process. Geophones with piezoelectric structures a...

AI Technical Summary

Problems solved by technology

However, due to its inherent mechanical characteristics, it has disadvantages such as low sensitivity, small dynamic range, large mass and volume, and poor anti-interference ability compared to the accuracy and dynamic range that can be achieved by existing seismic instruments. High requirements and complicated manufacturing process

Geophones with piezoelectric structures have also been used in land and water seismic exploration, and have achieved good results, but there are still some areas to be improved, such as large quality and volume, insufficient sensitivity, and poor anti-interference ability.

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