A Piezoelectric Swamp Geophone

Abstract

The invention discloses a piezoelectric swamp detector, which comprises ceramic sheets (10), weight bodies (11), a movement shell (6), and a detector shell with sealed waterproof effect. The movement shell (6) is arranged in the detector shell. A copper substrate conducted with the movement shell (6) is installed inside the movement shell (6). The ceramic sheets (10) are attached to both the upper and lower surfaces of the copper substrate. The ceramic sheets (10) on the two surfaces are both provided with the weight bodies (11). A circuit board (12) is arranged on the movement shell (6), and an adapter board (14) is arranged on the circuit board (12). A transmission line (1) with a sealing rubber sleeve (2) is introduced out of the upper end of the detector shell, and a tail vertebra is installed on the lower end of the detector shell. The detector has a good long-time waterproof function, thus prevents leakage phenomena when the detector conducts construction work in waters for a long time, and fully meets the requirements of the detector for construction work in swamp waters. Besides, the detector is small in size, good in grounding effect and convenient for construction work.

Description

technical field [0001] The invention belongs to the field of piezoelectric detectors and relates to a piezoelectric swamp detector. Background technique [0002] Geophones for seismic and geophysical prospecting will encounter various surface conditions when working in the field, including construction operations in water areas. Since construction operations in water areas are very inconvenient, it is not suitable for combined geophone strings. It is better The best method is to use a single geophone, and because the geophone is used in water, the geophone itself is required to have a good waterproof function. Water is a good mechanical filter attenuator, which has a strong attenuation effect on sound waves from space and surface waves on the ground, and there is no shear wave in water. Therefore, the influence of mechanical interference on the geophone in water is much smaller than that on land, and the influence of electromagnetic interference on the geophone in water is ...

AI Technical Summary

Problems solved by technology

It cannot meet the requirements of use in various swampy water environments, and there is no good grounding channel, and the suppression effect on electromagnetic interference is not good.

[0004] 2. Chinese patent ZL 201320713509.1 discloses a multifunctional land-use piezoelectric detector. This detector is also suitable for use on land, but not for use in swampy waters. At the same time, this detector adopts two core structures. It makes the volume larger, and adopts the side outlet method, which is not convenient for construction and operation in water areas. This is also the main reason why this kind of geophone cannot be extended to swamp waters.

[0005] To sum up, although the above two detectors are single piezoelectric detectors, they have not solved the problem of soaking in water for a long time, which will cause the leakage of the detector and cause the detector to fail. It works normally in water, but there are also problems such as poor grounding of the geophone, large size, and inconvenient construction operations when the side outlet is inconvenient, which limits the application of this type of geophone in swamp water.

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